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Journal articles on the topic 'Rotor resistance'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Kawase, H., K. Kato, T. Matsuhisa, and T. Mizuno. "Development of Ceramic Turbocharger Rotors for High-Temperature Use." Journal of Engineering for Gas Turbines and Power 115, no. 1 (1993): 23–29. http://dx.doi.org/10.1115/1.2906681.

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A ceramic turbocharger rotor (CTR) for high-temperature use has been developed. The features of this rotor are the use of silicon nitride, which maintains high mechanical strength up to 1200°C, and a new joining technique between the ceramic rotor and its metal shaft. The CTR is expected to cope with stoichiometric mixture burning engines, which produce a higher exhaust gas temperature for fuel economy, and the impact resistance of the rotor against foreign object damage (FOD) has been markedly increased, over that of earlier rotors, resulting in higher reliability. This paper describes the de

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2

Moon, Mahin Hasan, Sikder Ariyan Zaman, Md Daluar Hussain, and Md Mezbah Uddin. "A Preliminary Assessment of Power Savings by Flettner Rotors Installed on a Cargo Ship." MIST INTERNATIONAL JOURNAL OF SCIENCE AND TECHNOLOGY 13 (June 30, 2025): 73–82. https://doi.org/10.47981/j.mijst.13(01)2025.508(73-82).

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In response to increasingly stringent environmental regulations by the International Maritime Organization (IMO), this study presents a preliminary assessment of Flettner rotors as a viable wind-assisted propulsion system for cargo ships. Using RANS-based Computational Fluid Dynamics (CFD), the aerodynamic performance of various rotor configurations is evaluated under different wind speeds, spin ratios, and angles of attack. Initially, an isolated 2D and 3D rotor at model scale are simulated for various operating conditions. A grid convergence study is conducted as part of the CFD results veri

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3

Gowreesan, Vamadevan, Dhimas Ario, Hepy Hanifa, and Wayne Greaves. "Weld Repair of Steam Turbine Rotor with 12 Cr Weld to Mitigate Corrosion Issues." MATEC Web of Conferences 269 (2019): 03007. http://dx.doi.org/10.1051/matecconf/201926903007.

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Weld repair of steam turbine rotors has become an acceptable practice to extend the life of rotors. Depending on the type of damage, the extent of weld repair can range from weld build-up of integral discs to stubbing a new forging to replace the damaged portion of an old rotor. Steam turbine rotors made of low alloy steels experience corrosion related damages such as stress corrosion cracking, pitting corrosion, corrosion-erosion etc., Traditional weld repairs have been using low alloy steel welds. While the low alloy welds may have mechanical properties comparable to or even slightly exceedi

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4

Daut, I., Gomesh Nsurface, Y. Yanawati, Muhamad Irwanto, and S. Nor Shafiqin. "In House Construction of an Induction Motor Rotor by Using 0.35mm Thickness of Steel Sheet for Efficiency Based Investigation." Applied Mechanics and Materials 110-116 (October 2011): 67–71. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.67.

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In this paper, an in house production of a 0.5hp induction motor’s rotor is investigated. This investigation considers the induction motor’s efficiency and losses dissipation as an important aspect to determine the rotors efficiency. Through out this project, a new rotor which has 0.35mm steel sheet thickness and 10mm rotor bar slot size is constructed and compared with the existing rotor which has 0.50mm steel sheet thickness and 10mm rotor bar slot size. Once the construction phase of the rotor has been completed an in house motor experiment is done such as the no load, blocked rotor and dc

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5

Li, Chong, Jiayou Wang, Meng Li, et al. "Simulation of the Design Performance of Carbon Fiber/Glass Fiber Hybrid-Reinforced Resin Matrix Composite Rotors." Polymers 17, no. 12 (2025): 1668. https://doi.org/10.3390/polym17121668.

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Composite rotors, attributing to their leveraging characteristics of the light weight, high strength, high rigidity, corrosion resistance, and low noise, can significantly reduce the moment of inertia and enhance equipment operational efficiency. Using carbon fiber/glass fiber hybrid-reinforced resin–matrix composites as the rotor base material, the radial stability of a rotor can be effectively increased by regulating the fiber volume content. Meanwhile, the introduction of glass fiber not only enables the transition between the metal hub and composite rim but also optimizes the cost structur

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6

Chen, Jenn-Yih. "PASSIVITY-BASED PARAMETER ESTIMATION AND COMPOSITE ADAPTIVE POSITION CONTROL OF INDUCTION MOTORS." Transactions of the Canadian Society for Mechanical Engineering 37, no. 3 (2013): 559–69. http://dx.doi.org/10.1139/tcsme-2013-0044.

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In the rotor reference frame, the input-output linearization theory was adopted to decouple the rotor position and rotor flux. We then designed two adaptation laws to estimate the rotor resistance and mechanical parameters of the motor. The passive properties of the negative feedback connection from the rotor flux observer to the rotor resistance estimator, and the position controller were analyzed according to the passivity theorem. The overall control system was proved to be globally stable. Finally, experimental results show that the proposed scheme is robust to the variations of the rotor

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7

Toylbay, Ozgerishan, Gulzhan Seifulla, Aidos Moldabekov, Dastan Yergaliyev, and Uljalgas Adilbayeva. "THE EFFECT OF SURFACE ROUGHNESS AND ELECTROSTATIC BONDS OF RESIDUAL GASES ON THE SETTLING OF THE GYROSCOPE ROTOR." Вестник КазАТК 132, no. 3 (2024): 110–19. http://dx.doi.org/10.52167/1609-1817-2024-132-3-110-119.

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Consider the rotor of an electrostatic gyroscope (ESG) for contactless operation. The rotors of the ESG are made in the shape of a ball and placed in an electric field. The gyroscope operates contactless between the rotor and the mutual oscillation force of the electrodes. Air is sucked out of the chamber in which the rotor is located. Due to the lack of air resistance and the lack of friction force, the rotor can rotate for a long time. But the rotor, located inside the vacuum, also slows down. The reason for this is the roughness and residual deposits of the rotor surface. This is the notori

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8

Khattab, Afraa, and Csaba Felhő. "ALUMINUM MATRIX COMPOSITES ALTERNATIVE FOR BRAKE ROTOR APPLICATIONS." Cutting & Tools in Technological System, no. 100 (June 15, 2024): 87–118. http://dx.doi.org/10.20998/2078-7405.2024.100.08.

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This literature overview examines the capacity of using aluminum matrix composites (AMCs) rather than conventional grey solid iron in brake rotor packages. Driven by the preference for lighter and more environmentally friendly vehicles, AMCs offer several benefits, including decreased weight, advanced thermal properties, superior put-on resistance, and an optimized breaking system. Studies have concluded that AMCs can gain weight reductions of up to 60% compared to cast iron, resulting in stepped-forward gas performance and automobile management. Besides exhibiting superior thermal conductivit

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9

Nelson, Oyakhilomen Omogbai. "The Relative Sensitivity of Rotor Impedance Parameters to the Design Changes in Rotor Bar Geometry - A Torque Production perspective." International Journal of Novel Research in Engineering and Science 9, no. 2 (2023): 35–39. https://doi.org/10.5281/zenodo.7612848.

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<strong>Abstract:</strong> This article delves into the geometry-impedance relation of the three-phase squirrel cage induction motor (SCIM), to study the levels of sensitivity of the impedance parameters to design modifications in the geometry of the rotor bar cross section. Studies have long clarified the facts about the strong influence that the geometry of the rotor bar transverse section has on the standstill and operating impedance values of the rotor circuit, and it is a well-known fact that the development of electromagnetic torque as well as the shape of the torque-speed characteristic

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10

Pham Van, Tuan, Dung Vo Tien, Zbigniew Leonowicz, Michal Jasinski, Tomasz Sikorski, and Prasun Chakrabarti. "Online Rotor and Stator Resistance Estimation Based on Artificial Neural Network Applied in Sensorless Induction Motor Drive." Energies 13, no. 18 (2020): 4946. http://dx.doi.org/10.3390/en13184946.

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This paper presents a new approach method for online rotor and stator resistance estimation of induction motors using artificial neural networks for the sensorless drive. In this method, the rotor resistance is estimated by a feed-forward neural network with the learning rate as a function. The stator resistance is also estimated using the two-layered neural network with learning rate as a function. The speed of the induction motor is also estimated by the neural network. Therefore, the accurate estimation of the rotor and stator resistance improved the quality of the sensorless induction moto

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11

Karanayil, Baburaj, Muhammed Fazlur Rahman, and Colin Grantham. "Identification of Induction Motor Parameters in Industrial Drives with Artificial Neural Networks." Advances in Fuzzy Systems 2009 (2009): 1–10. http://dx.doi.org/10.1155/2009/241809.

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This paper presents a new method of online estimation of the stator and rotor resistance of the induction motor in the indirect vector-controlled drive, with artificial neural networks. The back propagation algorithm is used for training of the neural networks. The error between the rotor flux linkages based on a neural network model and a voltage model is back propagated to adjust the weights of the neural network model for the rotor resistance estimation. For the stator resistance estimation, the error between the measured stator current and the estimated stator current using neural network

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12

Chacko, Saji, Chandrashekhar N.Bhende, Shailendra Jain, and R. K. Nema. "A Novel Rotor Resistance Estimation Technique for Vector Controlled Induction Motor Drive Using TS Fuzzy." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 3 (2015): 538. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp538-553.

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Induction motor with indirect field oriented control is well suited for high performance applications due to its excellent dynamic behavior. But, the indirect field oriented controller is sensitive to variations in rotor time constant, especially variation in rotor resistance. In this study a scheme based on the Rotor flux Model Reference Adaptive Controller is used for on line identification of the rotor resistance and thus improving the steady state performance of the drive. The overriding feature of this estimation technique is the accurate identification of rotor resistance especially duri

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13

Fan, Bo, Zhumu Fu, Leipo Liu, and Jiangtao Fu. "The full-order state observer speed-sensorless vector control based on parameters identification for induction motor." Measurement and Control 52, no. 3-4 (2019): 202–11. http://dx.doi.org/10.1177/0020294019827341.

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During the operation of speed-sensorless control system for induction motor, the stator and rotor resistance varies greatly with the change of temperature and the frequency of the rotor side, which affects the estimation of the stator flux and leads to the low accuracy of the speed estimation. A speed-sensorless vector control method based on parameters identification with the full-order adaptive state observer is proposed in this paper. In the model reference adaptive system of AC motor, the stator resistance and rotor flux are assigned as state variables to build the reference model, and a f

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14

Nzita, André Mampuya, Léon Mwanda Mizengi, Guy Wanlogo Ndiwulu, et al. "Statistical Analysis of Electrical Component Aging in Group 6 of the Inga 2 Hydroelectric Plant Following Abrupt Shutdowns." Computational And Experimental Research In Materials And Renewable Energy 7, no. 2 (2024): 78. https://doi.org/10.19184/cerimre.v7i2.51268.

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The Inga 2 hydroelectric power plant in the Democratic Republic of the Congo plays a crucial role in national electricity production and distribution. On January 5, 2016, Unit 3 abruptly shut down, triggering a cascade of shutdowns in other units and disrupting the network frequency. This study aims to analyze the evolution of the stator and rotor winding resistances, as well as the insulation resistance of turbine-generator Unit 6, from its commissioning in 1982 until 2016. The goal is to assess the impact of sudden shutdowns on the aging of its electrical components. Measurements of stator a

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15

Liu, Huai Cong, Jang Soo Park, and Il Hwan An. "Design, Analysis, and Comparison of Electric Vehicle Drive Motor Rotors Using Injection-Molded Carbon-Fiber-Reinforced Plastics." World Electric Vehicle Journal 15, no. 7 (2024): 283. http://dx.doi.org/10.3390/wevj15070283.

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Due to their excellent mechanical strength, corrosion resistance, and ease of processing, carbon fiber and carbon-fiber-reinforced plastics are finding wide application in diverse fields, including aerospace, industry, and automobiles. This research explores the feasibility of integrating carbon fiber solutions into the rotors of 85-kilowatt electric vehicle interior permanent magnet synchronous motors. Two novel configurations are proposed: a carbon fiber wire-wound rotor and a carbon fiber injection-molded rotor. A finite element analysis compares the performance of these models against a ba

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16

Takama, K., S. Sasaki, T. Shimizu, and N. Kamiya. "Design and Evaluation of Silicon Nitride Turbocharger Rotors." Journal of Engineering for Gas Turbines and Power 115, no. 1 (1993): 17–22. http://dx.doi.org/10.1115/1.2906675.

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Two types of silicon nitride ceramic rotor have been introduced into the Japanese market by Toyota Motor Corporation, named CT26 and CT12A, to improve engine acceleration response by the reduction in moment of inertia. In order to design a suitable blade shape for a ceramic rotor, the critical stress of the blade was determined by the results obtained experimentally from correlating the fracture origin over spintested rotors with centrifugal stress at fracture. A suitable blade shape has been determined for the CT26 turbocharger rotor type, which is identical to the metal rotor except for the

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17

Ben Regaya, C., A. Zaafouri, and A. Chaari. "Electric Drive Control with Rotor Resistance and Rotor Speed Observers Based on Fuzzy Logic." Mathematical Problems in Engineering 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/207826.

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Many scientific researchers have proposed the control of the induction motor without speed sensor. These methods have the disadvantage that the variation of the rotor resistance causes an error of estimating the motor speed. Thus, simultaneous estimation of the rotor resistance and the motor speed is required. In this paper, a scheme for estimating simultaneously the rotor resistance and the rotor speed of an induction motor using fuzzy logic has been developed. We present a method which is based on two adaptive observers using fuzzy logic without affecting each other and a simple algorithm in

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18

Nasir, Bilal Abdullah. "Dynamic Modeling of Wound-Rotor Slip-Ring Induction Generator with Switched-Excitation Capacitance and Chopper Resistance Across Bridge Rectifier in the Rotor Circuit." European Journal of Electrical Engineering 24, no. 1 (2022): 27–32. http://dx.doi.org/10.18280/ejee.240104.

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This paper presents a novel external secondary self-excitation capacitance and chopper resistance across the diode bridge rectifier in the rotor circuit to control the voltage and frequency of 3-phase, wound-rotor, slip-ring, induction generator (WRSRIG). The problem related to the excitation- capacitance from the rotor side is the required large excitation capacitance to enhance the generator performance in a wide - range. In the present proposed method, a dynamic excitation capacitance is used in the H-Bridge inverter circuit connected in series with a chopper resistance across a 3-phase dio

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19

Tezcan, Mehmet Murat, Asim Gökhan Yetgin, Ali Ihsan Canakoglu, Bariş Cevher, Mustafa Turan, and Murat Ayaz. "Investigation of the effects of the equivalent circuit parameters on induction motor torque using three different equivalent circuit models." MATEC Web of Conferences 157 (2018): 01019. http://dx.doi.org/10.1051/matecconf/201815701019.

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In this study, the most vital characteristic properties of induction motor, motor starting, maximum and nominal torque are analyzed for what are affected. For the analysis of torque, L type, T type and IEEE 112 equivalent circuit model is employed. Torque change is investigated with the help of codes developed in MATLAB to be used in electrical machines course. First, the slip-moment characteristic curve of the induction motor is divided into three working zones and it was determined which equivalent circuit model gave the best results in these study zones. Later, such parameters as stator and

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20

Echeikh, H., R. Trabelsi, Atif Iqbal, M. F. Mimouni, and R. Alammari. "Online Adaptation of Rotor Resistance based on Sliding Mode Observer with Backstepping Control of A Five-Phase Induction Motor Drives." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 3 (2016): 648. http://dx.doi.org/10.11591/ijpeds.v7.i3.pp648-655.

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Multiphase electric drives have been developed due to numerous advantages offered by those machines when it compared with the conventional three-phase machines. Multiphase motor drives are considered for applications, where the reduction of power per phase for both motor and inverter and high reliability are required. High performance control techniques are developed for multi-phase drives. The performances of the high performance controller and flux observers may be degraded during the operation. Since the parameters of Induction Motor (IM) varies continuously due to temperature variation and

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21

Chen, Jenn Yih, and Bean Yin Lee. "Adaptive Parameter Estimation and Position Control of Induction Motors Based on Passivity Theorem." Materials Science Forum 626-627 (August 2009): 489–94. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.489.

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This paper presents the passivity-based rotor resistance and mechanical paramters estimation, and the position control for induction motors. Firstly, the input-output linearization theory is employed to decouple the rotor flux amplitude and the rotor position at the transient state. An open-loop current model flux observer then estimates the rotor flux. Furthermore, we adopted the gradient algorithm to design adaptive laws to estimate the rotor resistance, moment of inertia, viscous coefficient, and load torque. The passive properties of the feedback connection of the rotor flux observer to th

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Chen, Jenn Yih. "Passivity-Based Parameter Estimation and Position Control of Induction Motors via Composite Adaptation." Applied Mechanics and Materials 284-287 (January 2013): 1894–98. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1894.

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This paper proposes the parameters estimation and position control of an induction motor drive by using the composite adaptation scheme. First, in the rotor reference frame, the input-output linearization theory was employed to decouple the mechanical rotor position and the rotor flux amplitude at the transient state. An open-loop current model rotor flux observer was utilized for estimating the flux, and then the adaptive laws for estimating the rotor resistance, moment of inertia, viscous friction coefficient, and load torque. The passive properties of the flux observer, rotor resistance est

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23

Adamczyk, Michal, and Teresa Orlowska-Kowalska. "Active Current Sensor Fault-Tolerant Control of Induction Motor Drive with Online Neural Network-Based Rotor and Stator Resistance Estimation." Power Electronics and Drives 8, no. 1 (2023): 235–51. http://dx.doi.org/10.2478/pead-2023-0016.

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Abstract This article presents an active current sensor (CS) fault-tolerant control (FTC) strategy for induction motor (IM) drive with adaptation of rotor and stator resistances. The stator current estimator with online adaptation of resistance parameters was applied for the reconstruction of missing current signals. A model reference adaptive system (MRAS), based on a neural network (NN), was used to estimate the rotor resistance. Additionally, stator resistance estimation was applied based on ratio index. The use of such a solution allowed for a significant increase in the quality of stator

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24

Omeje, Crescent Onyebuchi, Damian Benneth Nnadi, and Stephen Ejiofor Oti. "Multi-phase inverter-controlled induction machine at varied rotor parameters." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 5 (2022): 4808. http://dx.doi.org/10.11591/ijece.v12i5.pp4808-4819.

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<p>This paper presents a step-wise modelling of a symmetrical six-phase induction machine driven by a six-phase diode clamped multi-level inverter at a varying rotor resistance and motor inertia. The machine drive process was considered in two stages. The first stage presents the dynamic behavior of the machine when a load torque of 0 Nm and 100 Nm is applied at a varied rotor external resistance value of (0.8 and 3.2) Ω with constant motor inertia. The second stage showcased the variations in the speed, electromagnetic torque and rotor current when motor inertia is varied at (0.5 and 1.

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Crescent, Onyebuchi Omeje, Benneth Nnadi Damian, and Ejiofor Oti Stephen. "Multi-phase inverter-controlled induction machine at varied rotor parameters." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 5 (2022): 4808–19. https://doi.org/10.11591/ijece.v12i5.pp4808-4819.

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This paper presents a step-wise modelling of a symmetrical six-phase induction machine driven by a six-phase diode clamped multi-level inverter at a varying rotor resistance and motor inertia. The machine drive process was considered in two stages. The first stage presents the dynamic behavior of the machine when a load torque of 0 Nm and 100 Nm is applied at a varied rotor external resistance value of (0.8 and 3.2) Ω with constant motor inertia. The second stage showcased the variations in the speed, electromagnetic torque and rotor current when motor inertia is varied at 0.5 Kg-m2 and

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26

Ben, Regaya, Farhani, Zaafouri, and Chaari. "Comparison between two methods for adjusting the rotor resistance." International Review on Modelling and Simulations 5, no. 2 (2012): 938–44. https://doi.org/10.5281/zenodo.1400581.

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In this paper, the indirect vector control with rotor resistance adaptation is presented, since the command performance depends greatly on the variation of rotor time constant, therefore two adaptive mechanisms have been proposed to identify this constant in order to have a robust control that reflects this kind of change while ensuring decoupling between flux and torque. The first adjustment mechanism based on fuzzy logic, a study was made to present the steps needed to design a fuzzy controller of the rotor resistance. The second mechanism has been developed from an adaptive observer to desi

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27

Regaya, Chiheb Ben, Fethi Farhani, Abderrahmen Zaafouri, and Abdelkader Chaari. "Adaptive proportional-integral fuzzy logic controller of electric motor drive." Engineering review 41, no. 2 (2021): 26–40. http://dx.doi.org/10.30765/er.1446.

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This paper presents the indirect field vector control of induction motor (IM) which is controlled by an adaptive Proportional-Integral (PI) speed controller. The proposed solution can overcome the rotor resistance variation, which degrades the performance of speed control. To solve this drawback, an adaptive PI controller is designed with gains adaptation based on fuzzy logic in order to improve the performances of IM with respect to parameters variations, particularly the rotor resistance (Rr). The proposed control algorithm is validated by simulation tests. The obtained results show the robu

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28

Larsson, Bjo¨rn. "Heat Separation in Frictional Rotor-Seal Contact." Journal of Tribology 125, no. 3 (2003): 600–607. http://dx.doi.org/10.1115/1.1472456.

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The development of thermal bows in rotors is frequently reported. The cause of the bows is an asymmetric temperature distribution as a result of uneven heating. The heat source can be a friction contact between rotor and seal. Both partial and full annular rub can give asymmetric heating. A general model for these two cases is a rotor with an arbitrary elliptic orbit and an eccentric position in an elliptic seal. Depending of these kinematics, different regions of the rotor and seal are heated and the heat flow resistance effected. Closed-form solutions of the heat conduction in three spatial

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29

Wang, Chunze, Rui Feng, Yao Chu, Qing Tan, Chaoyang Xing, and Fei Tang. "Simulations of the Rotor-Stator-Cavity Flow in Liquid-Floating Rotor Micro Gyroscope." Micromachines 14, no. 4 (2023): 793. http://dx.doi.org/10.3390/mi14040793.

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When rotating at a high speed in a microscale flow field in confined spaces, rotors are subject to a complex flow due to the joint effect of the centrifugal force, hindering of the stationary cavity and the scale effect. In this paper, a rotor-stator-cavity (RSC) microscale flow field simulation model of liquid-floating rotor micro gyroscopes is built, which can be used to study the flow characteristics of fluids in confined spaces with different Reynolds numbers (Re) and gap-to-diameter ratios. The Reynolds stress model (RSM) is applied to solve the Reynolds averaged Navier–Stokes equation fo

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IORDACHE, Mihai, Sorin DELEANU, and Neculai GALAN. "THE ANALYSIS OF THE THREE-PHASE INDUCTION MOTOR WITH DEEP ROTOR BARS THROUGH NUMERICAL SIMULATIONS UTILIZING A MODIFIED MATHEMATICAL MODEL." "ACTUALITĂŢI ŞI PERSPECTIVE ÎN DOMENIUL MAŞINILOR ELECTRICE (ELECTRIC MACHINES, MATERIALS AND DRIVES - PRESENT AND TRENDS)" 2020, no. 1 (2021): 1–11. http://dx.doi.org/10.36801/apme.2020.1.15.

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The three-phase induction machine mathematical model presented in the paper, is adequate for applying to the deep rotor bars case. The rotor resistance R’r(r), respectively its leakage inductivity L’r(r), depend upon the rotor currents’ frequency fr because of the skin effect. Following the previous considerations, one developed slip dependent analytical expressions of the rotor circuit resistance R’r(s), respectively rotor circuit leakage reactance L’r (s). A modified space phasor based mathematical model of the deep bar induction motor is tested through simulations to assess the motor’s

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31

Kanakabettu, Ajithanjaya Kumar Mijar, Rajkiran Ballal Irvathoor, Sanath Saralaya, Sathyendra Bhat Jodumutt, and Athokpam Bikramjit Singh. "Novel Advanced Artificial Neural Network-Based Online Stator and Rotor Resistance Estimator for Vector-Controlled Speed Sensorless Induction Motor Drives." Energies 17, no. 9 (2024): 2150. http://dx.doi.org/10.3390/en17092150.

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This paper presents a new approach for the online estimation of stator and rotor resistance of induction motors for speed sensorless vector-controlled drives, using feed-forward artificial neural networks with advanced adaptive learning rates. For the rotor resistance estimation, a neural network model based on rotor speed and stator currents is developed. The rotor flux linkages acquired from the voltage model are compared with the neural network model. The feed-forward neural network employs an adaptive learning rate as the function of the obtained error during training for quick convergence

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32

Aswad, Raya A. K., Laszlo Szamel, and Bassim M. H. Jassim. "Trajectory of Rotor Resistance for Detecting Broken Rotor Bars of Asynchronous Machines." Acta Polytechnica Hungarica 22, no. 3 (2025): 211–26. https://doi.org/10.12700/aph.22.3.2025.3.11.

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Guo, Lei, Zhongping Yang, and Fei Lin. "A Novel Strategy for Sensorless Control of IPMSM with Error Compensation Based on Rotating High Frequency Carrier Signal Injection." Energies 13, no. 8 (2020): 1919. http://dx.doi.org/10.3390/en13081919.

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In the applications of rail transit and electric vehicles, sensorless control of interior permanent magnet synchronous motor (IPMSM) usually uses high frequency (HF) signal injection in low speed or zero speed. Rotating HF signal injection based on the stationary reference frame can identify the rotor position, but its accuracy is easily affected by various nonlinearities of the control system and stator resistance. In this paper, the causes of rotor position estimation deviation are analyzed and deduced in detail. It is proposed that the rotor position estimation deviation can be divided into

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34

Kotenev, Viktor I., and Alexander D. Stulov. "Method for calculating the resistance of an asynchronous squirrel cage motor according to passport data and estimation of its error." Vestnik of Samara State Technical University. Technical Sciences Series 29, no. 3 (2021): 98–110. http://dx.doi.org/10.14498/tech.2021.3.6.

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A simpler method is proposed for determining the resistances of an induction motor (total inductive resistance, active resistance of the stator and reduced active resistance of the rotor) according to reference data. Three algebraic equations are obtained from the equations of reactive power dissipation and electromagnetic power in the nominal mode and the equation of electromagnetic power in the critical mode: the first is relative to three resistances, the second is the equation of the dependence of the active resistance of the stator relative to the total inductive resistance, and the third

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35

Xie, Zhen, and Xue Li. "The Virtual Resistance Control Strategy for HVRT of Doubly Fed Induction Wind Generators Based on Particle Swarm Optimization." Mathematical Problems in Engineering 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/350367.

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Grid voltage swell will cause transient DC flux component in the doubly fed induction generator (DFIG) stator windings, creating serious stator and rotor current and torque oscillation, which is more serious than influence of the voltage dip. It is found that virtual resistance manages effectively to suppress rotor current and torque oscillation, avoid the operation of crowbar circuit, and enhance its high voltage ride through technology capability. In order to acquire the best virtual resistance value, the excellent particle library (EPL) of dynamic particle swarm optimization (PSO) algorithm

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KINAL, Grzegorz, and Michał LIBERA. "ANALYSIS OF THE HARDNESS OF A SELECTED GROUP OF CAST IRON BRAKE ROTORS." Tribologia 276, no. 6 (2017): 27–31. http://dx.doi.org/10.5604/01.3001.0010.8055.

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The paper discusses the problems related to cast iron brake rotors in the context of their hardness, which is one of the fundamental mechanical properties of these components. This property fundamentally determines the resistance to the wear processes occurring at the contact of the working surface of the rotor with the brake pad. In order to ensure a proper braking process, the manufacturer must appropriately select the friction pair in terms of the hardness of the mating components and guarantee the constant hardness of each and every manufactured brake rotor. The research presented in the p

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Wei, Wen Xiang, and Xiao Ping Zhang. "Flux and Speed Estimation Based on the Extended State Observer for Speed Sensorless Control of Indirect Field Oriented Induction Motor Drives." Applied Mechanics and Materials 273 (January 2013): 414–18. http://dx.doi.org/10.4028/www.scientific.net/amm.273.414.

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A flux observer based on the extended state observer (ESO) is proposed for rotor flux estimation and speed identification of indirect field oriented induction motor drives system. The uncertain component including rotor resistance and speed in the stator current equation is extended to a new state, the ESO is then constructed. By the current estimate error, the uncertain component convergences to its actual value and the accurate rotor flux, speed and the rotor time constant are obtained. The accuracy of the ESO independent the rotor resistance and load torque variations, simulations under hig

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Dafang, Wang, Wang Miaoran, Dong Guanglin, Wei Hui, and Xu Zexu. "Speed and Rotor Resistance Estimation of AC Induction Motor." MATEC Web of Conferences 173 (2018): 02037. http://dx.doi.org/10.1051/matecconf/201817302037.

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The speed estimation method based on Extended Kalman Filter (EKF) is widely used in speed sensorless induction motor. The method has high accuracy and good robustness. However, EKF is sensitive to parameters. In particular, the rotor resistance becomes up to twice the original when the motor is running. This greatly affects the speed identification accuracy. This paper achieves online estimation of rotor resistance utilizing the Model Reference Adaptive Controller (MRAC) based on reactive power. This ensures that the speed is estimated with high accuracy even if the rotor resistance changes su

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Dayhoum, Abdallah, Alejandro Ramirez-Serrano, and Robert J. Martinuzzi. "Design of an Experimental Test Rig for Shrouded and Open Rotors for Small Rotary Wing Unmanned Aerial System." Electronics 14, no. 8 (2025): 1584. https://doi.org/10.3390/electronics14081584.

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This study details the design and testing of a custom test rig for evaluating the performance of both open and shrouded rotors. The rig includes a two-axis load cell that is directly connected to the rotor to measure the rotor thrust separated from the total thrust when testing shrouded rotors and ensure accurate torque measurements, independent of external structural influences. Moreover, a main load cell is used to measure the total thrust for both configurations (open and shrouded rotor), as it is connected to the entire setup. Rotor RPM is monitored by capturing the voltage frequency from

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Carlson, Renato, Cláudia A. da Silva, Nelson Sadowski, and Michel Lajoie-Mazenc. "An analysis of inter-bar currents on a polyphase cage induction motor." Sba: Controle & Automação Sociedade Brasileira de Automatica 15, no. 4 (2004): 476–84. http://dx.doi.org/10.1590/s0103-17592004000400011.

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This work uses a methodology based on 2D-Finite Element Method (FEM) and on the Circuits Theory (Independent Currents Method) to analyze the inter-bar currents on the rotor of cage induction motors. The Multi-Slice Technique is used to consider the skewing effect. Three conditions are considered: one inter-bar resistance, two inter-bar resistances and three inter-bar resistances. The results show the distribution of currents in the rotor bars, short-circuit rings and transversal resistances at a given time. The fundamental component of the inter-bar and surrounding bar currents are shown to he

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Imada, Takumi, Tadashi Makiyama, Heisaburo Nakagawa, Yoshihide Hasegawa, Kenji Tomoda, and Keiji Ogawa. "Study on Grinding of Hypocycloid-Curved Rotor Made of Alumina Ceramics with a Small-Diameter Ball-End Electroplated Diamond Grinding Wheel." International Journal of Automation Technology 15, no. 1 (2021): 89–98. http://dx.doi.org/10.20965/ijat.2021.p0089.

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The coating process of high-performance films, such as electrodes for lithium-ion batteries, requires high-precision transfer of settling slurries and high-viscosity liquids. This is because transfer characteristics, such as low pulsation and quantitative transfer, have a significant impact on product performance. A single eccentric screw pump is used in this coating process. One component of this pump is a complex-shaped rotor. This rotor must have high precision and high wear and chemical resistance. To meet these requirements, we applied alumina ceramics, which have excellent material prope

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Ho, Sang Dang, Petr Palacky, Martin Kuchar, Pavel Brandstetter, and Cuong Dinh Tran. "Particle swarm optimization-based stator resistance observer for speed sensorless induction motor drive." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 1 (2021): 815. http://dx.doi.org/10.11591/ijece.v11i1.pp815-826.

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This paper presents a different technique for the online stator resistance estimation using a particle swarm optimization (PSO) based algorithm for rotor flux oriented control schemes of induction motor drives without a rotor speed sensor. First, a conventional proportional-integral controller-based stator resistance estimation technique is used for a speed sensorless control scheme with two different model reference adaptive system (MRAS) concepts. Finally, a novel method for the stator resistance estimation based on the PSO algorithm is presented for the two MRAS-type observers. Simulation r

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Sang, Dang Ho, Palacky Petr, Kuchar Martin, Brandstetter Pavel, and Dinh Tran Cuong. "Particle swarm optimization-based stator resistance observer for speed sensorless induction motor drive." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 1 (2021): 815–26. https://doi.org/10.11591/ijece.v11i1.pp815-826.

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This paper presents a different technique for the online stator resistance estimation using a particle swarm optimization (PSO) based algorithm for rotor flux oriented control schemes of induction motor drives without a rotor speed sensor. First, a conventional proportional-integral controller-based stator resistance estimation technique is used for a speed sensorless control scheme with two different model reference adaptive system (MRAS) concepts. Finally, a novel method for the stator resistance estimation based on the PSO algorithm is presented for the two MRAS-type observers. Simulation r

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Hara, Yutaka, Naoki Horita, Shigeo Yoshida, Hiromichi Akimoto, and Takahiro Sumi. "Numerical Analysis of Effects of Arms with Different Cross-Sections on Straight-Bladed Vertical Axis Wind Turbine." Energies 12, no. 11 (2019): 2106. http://dx.doi.org/10.3390/en12112106.

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Most vertical axis wind turbines (VAWTs) need arms connecting the blades with the rotational axis. The arms increase the power loss of VAWTs; however, the distribution between the pressure and friction influences and their degrees of influence have not yet been investigated in detail in past research. We applied computational fluid dynamics (CFD) targeting a small-sized straight-bladed VAWT to elucidate the effects of arms on turbine performance. In the analysis, three kinds of arms with different cross-sections (NACA 0018 airfoil, 18% rectangular, circular) with the same height were added to

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Terras, Tahar, Samir Hadjeri, Abdelkader Mezouar, and Tarek Chikouche. "Robust speed control with rotor resistance estimation." Canadian Journal of Electrical and Computer Engineering 36, no. 2 (2013): 43–51. http://dx.doi.org/10.1109/cjece.2013.6601079.

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Atkinson, D. J., J. W. Finch, and P. P. Acarnley. "Estimation of rotor resistance in induction motors." IEE Proceedings - Electric Power Applications 143, no. 1 (1996): 87. http://dx.doi.org/10.1049/ip-epa:19960004.

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Kolychev, S., and А. Sianov. "EXPERIMENTAL STUDY OF STATIC CHARACTERISTICS ASYNCHRONOUS MACHINE IN DYNAMIC BRAKING MODE WITH INDUCTION RESISTANCE IN THE ROTOR WINDING." Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 1, no. 38 (2021): 68–74. http://dx.doi.org/10.31319/2519-2884.38.2021.8.

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The article discusses the results of a study of the static electromechanical characteristics of an asynchronous machine (AM) when prototypes of induction resistances (IR) with improved parameters are included in its rotor circuits. The dynamic braking (DB) of asynchronous machines, which is widespread in practice, provides for the dissipation of the kinetic energy of the rotating parts in the resistance boxes included in the rotor winding. In the process of stopping, to maintain a constant average braking torque AM, a bulky relay-contactor circuit for shunting rotor resistances is used. Howeve

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GUO, Ang, Zuo-dong HUANG, Zai-ran DING, Yi SHI, Lei JIAO, and Jian-xing LENG. "Research on Rotational Resistance Moment of Rotary Energy Recovery Device." E3S Web of Conferences 53 (2018): 02001. http://dx.doi.org/10.1051/e3sconf/20185302001.

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The effects of operational conditions on the resistance moment of a rotary energy recovery device have been systematically investigated through the computational fluid dynamics in this paper. Based on the structural characteristics of the rotary energy recovery device, the hydro-static bearing was established on both sides of the rotor. Simulation results indicate that for the rotation resistance moment generated by the rotor internal flow path, the rotation speed is linearly positive with the rotational resistance moment. For the rotation resistance moment generated by the clearance flow, the

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Peresada, S. M., Y. O. Nikonenko, S. M. Kovbasa, D. I. Rodkin, and O. I. Kiselychnyk. "Observer-based speed estimation for vector controlled induction motors." Tekhnichna Elektrodynamika 2022, no. 1 (2022): 25–32. http://dx.doi.org/10.15407/techned2022.01.025.

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A speed observer for field-oriented controlled induction drives is presented. The proposed solution exploits the concept of the classic full-order flux observer which is adaptive to the rotor resistance variations. Due to the structural similarity of the rotor speed and active rotor resistance in motor model, the speed observer can be designed using similar structure. The observer guarantees local asymptotic estimation of the rotor fluxes, stator currents and rotor speed in all operating conditions, excluding DC stator excitation. The stability properties of the observer are studied using Lyap

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Perdukova, Daniela, Petr Palacky, Pavol Fedor, Peter Bober, and Viliam Fedak. "Dynamic Identification of Rotor Magnetic Flux, Torque and Rotor Resistance of Induction Motor." IEEE Access 8 (2020): 142003–15. http://dx.doi.org/10.1109/access.2020.3013944.

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