Log in

Relevant bibliographies by topics / Rotor Static Eccentricity / Journal articles

To see the other types of publications on this topic, follow the link: Rotor Static Eccentricity.

Journal articles on the topic 'Rotor Static Eccentricity'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Rotor Static Eccentricity.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Kotsur, I. M., M. I. Kotsur, D. S. Yarymbash, T. Ye Dyvchuk, Yu S. Bezverkhnia, and V. S. Ozerov. "Investigation of electromagnetic processes in the case of static eccentricity of a two-pole induction motor with a short-circuited rotor." Electrical Engineering and Power Engineering, no. 4 (April 24, 2024): 17–24. http://dx.doi.org/10.15588/1607-6761-2023-4-2.

Full text

Abstract:

Purpose. Correction of the mathematical model of electromagnetic processes in a two-pole induction motor with a short-circuited rotor, taking into account static rotor eccentricity to identify diagnostic correlations. Methodology. Analytical modeling using the method of specific magnetic conductivity, mathematical modeling of electromagnetic fields in a three-phase induction motor with a short-circuited rotor using methods of electromagnetic field theory and finite element methods. Obtained results. The necessity of improving mathematical models for induction motors with short-circuited rotors

APA, Harvard, Vancouver, ISO, and other styles

2

Karami, Mahdi, Norman Mariun, Mohammad Rezazadeh Mehrjou, Mohd Zainal Abidin Ab Kadir, Norhisam Misron, and Mohd Amran Mohd Radzi. "Static Eccentricity Fault Recognition in Three-Phase Line Start Permanent Magnet Synchronous Motor Using Finite Element Method." Mathematical Problems in Engineering 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/132647.

Full text

Abstract:

This paper is dedicated to investigating static eccentricity in a three-phase LSPMSM. The modeling of LSPMSM with static eccentricity between stator and rotor is developed using finite element method (FEM). The analytical expression for the permeance and flux components of nonuniform air-gap due to static eccentricity fault is discussed. Various indexes for static eccentricity detection using stator current signal of IM and permanent magnet synchronous motor (PMSM) are presented. Since LSPMSM is composed of a rotor which is a combination of these two motors, the ability of these features is ev

APA, Harvard, Vancouver, ISO, and other styles

3

Goroshko, Andrii, Maryna Zembytska, and Vadym Paiuk. "Induction Motor Vibrations Caused by Mechanical and Magnetic Rotor Eccentricity." Journal of Engineering Sciences 11, no. 1 (2024): D66—D77. http://dx.doi.org/10.21272/jes.2024.11(1).d8.

Full text

Abstract:

Vibration reduction of induction motors is a significant problem that requires effective models for the effects of mechanical and electromagnetic unbalanced forces. This article presents a mathematical model of dynamics for induction motors with rotor mass eccentricity and static and dynamic magnetic eccentricity. The model allows for the influence of the gyroscopic torque of the rotor and considers the elastic-damping characteristics of each of the stator supports and their location. The model has eight degrees of freedom, which makes it possible to simulate transverse and axial vibrations of

APA, Harvard, Vancouver, ISO, and other styles

4

Prudnikov, Artem, Vyacheslav Bonnet, Alexandr Loginov, and Yakov Bonnet. "The results of the production tests of the method for diagnosing the eccentricity of the rotor of an asynchronous electric motor." E3S Web of Conferences 390 (2023): 06020. http://dx.doi.org/10.1051/e3sconf/202339006020.

Full text

Abstract:

Ensuring the reliability of electrical equipment in agriculture remains an urgent problem, since rugged operating conditions and aggressive environment hinder its rational use. The high accident incidence rate of asynchronous motors in most cases is invariably caused by the failure of the inter-turn insulation and interphase short circuit or short circuits to the housing. The probability of an emergency situation increases with an increase in the radial clearance in the bearings and, consequently, the occurrence of static eccentricity of the rotor. The developed method for diagnosing the stati

APA, Harvard, Vancouver, ISO, and other styles

5

Ahlam, Luaibi Shuraiji. "The effect of static and dynamic eccentricities on the performance of flux reversal permanent magnet machine." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 2 (2020): 634–40. https://doi.org/10.11591/ijpeds.v11.i2.pp634-640.

Full text

Abstract:

This study investigates the effect of static and dynamic eccentricities on the performances of flux reversal permanent magnet (FRPM) machine with even rotor pole number, i.e. FRPM machine with 12/10 stator/rotor combination. No-load and load performances of the machine are investigated under three rotor operating conditions including centricity, static eccentricity and dynamic eccentricity. The investigation has been carried out using 2D-FEA. It has been revealed that the 12/10 FRPM machine under normal operating condition has no unbalanced magnetic force, due to the even pole number of the ro

APA, Harvard, Vancouver, ISO, and other styles

6

WERNER, ULRICH. "THEORETICAL VIBRATION ANALYSIS OF SOFT MOUNTED TWO-POLE INDUCTION MOTORS WITH STATIC ROTOR ECCENTRICITY." International Journal of Applied Mechanics 03, no. 01 (2011): 131–59. http://dx.doi.org/10.1142/s1758825111000919.

Full text

Abstract:

The paper shows a mathematical model for vibration analysis of soft mounted two-pole induction motors regarding electromagnetic excitation due to static rotor eccentricity. A static rotor eccentricity causes an electromagnetic force, acting on the rotor and on the stator and oscillating with the double supply frequency. This magnetic force is implemented into a simplified analytical machine dynamic model and the correlations between the rotor dynamics, electromagnetic, oil film characteristics of the sleeve bearings, and the stiffness and damping of a soft foundation are mathematically describ

APA, Harvard, Vancouver, ISO, and other styles

7

Zeng, Shan, Sigui Luo, Fei Wang, Xifan Lan, Xinrui Ma, and Yuxin Lu. "The Nonlinear Dynamic Characteristics of an Industrial Turbine Engine with Eccentric Squeeze Film Dampers." Applied Sciences 13, no. 24 (2023): 13325. http://dx.doi.org/10.3390/app132413325.

Full text

Abstract:

Squeeze film dampers are often used to suppress vibration in turbine engines and play an important role in rotor systems. In this paper, the nonlinear dynamic characteristics of an industrial turbine engine fitted with squeeze film dampers are investigated with the static eccentricity of the SFDs. A recently developed time domain technique that combines the finite element method and the fixed interface modal synthesis method is applied to predict the nonlinear unbalance response of the industrial turbine engine under different unbalanced and static eccentricity configurations. By comparing the

APA, Harvard, Vancouver, ISO, and other styles

8

Wang, Wenbo, Pengyun Song, Hechun Yu, and Guoqing Zhang. "Study on Static Characteristics of Ultra-Precision Aerostatic Motorized Spindle under Gas–Magnetic Field Coupling." Electronics 11, no. 9 (2022): 1434. http://dx.doi.org/10.3390/electronics11091434.

Full text

Abstract:

In the working process of ultra-precision aerostatic motorized spindles, the journal and the rotor must have a certain eccentricity to have a certain bearing capacity and stiffness, which will induce the unbalanced magnetic pull (UMP). The intercoupling of the UMP and the gas film force will affect the motion state of the rotor and the accuracy of spindles. In order to deeply study the influence of the UMP caused by the rotor eccentricity on the equilibrium position of aerostatic spindles, a physical model of an aerostatic spindle based on slit throttling gas bearing is established and the cou

APA, Harvard, Vancouver, ISO, and other styles

9

Wan, Shuting, and Yuling He. "INVESTIGATION ON STATOR AND ROTOR VIBRATION CHARACTERISTICS OF TURBO-GENERATOR UNDER AIR GAP ECCENTRICITY FAULT." Transactions of the Canadian Society for Mechanical Engineering 35, no. 2 (2011): 161–76. http://dx.doi.org/10.1139/tcsme-2011-0010.

Full text

Abstract:

This paper investigates the stator and the rotor vibration characteristics of turbo-generator under the air gap eccentricity fault. Firstly the air gap magnetic flux density of the fault is deduced, and the formula of the magnetic pull per unit area acting on the stator and the unbalanced magnetic pulls of x-axis and y-axis acting on the rotor are respectively gotten. Then the static eccentricity, the dynamic eccentricity and the mixed eccentricity are respectively studied to analyze the stator and the rotor vibration characteristics. Finally experiments are done on a SDF-9 non-salient fault s

APA, Harvard, Vancouver, ISO, and other styles

10

Wang, Xinrou, Rui Zhu, and Xuechao Wang. "Analysis of bending and torsional vibration characteristics of rotor under the influence of air gap eccentricity-rub impact coupling fault." Journal of Physics: Conference Series 2825, no. 1 (2024): 012025. http://dx.doi.org/10.1088/1742-6596/2825/1/012025.

Full text

Abstract:

Abstract Considering the challenges posed by air gap compound eccentricity fault and rubbing fault in gas turbine generator groups, we undertake an analysis of the air gap magnetic field variation in the presence of air gap compound eccentricity. Leveraging the energy method of the air gap magnetic field, we establish a model for an unbalanced magnetic pulling force induced by air gap compound eccentricity. Concurrently, we develop a dynamic model for rotor rubbing fault, from which we derive the expression for rubbing force. Subsequently, we formulate the dynamic equations governing rotor sys

APA, Harvard, Vancouver, ISO, and other styles

11

Lasjerdi, H., Z. Nasiri-Gheidari, and F. Tootoonchian. "Static Eccentricity Fault Diagnosis in Wound-Rotor Resolvers." IEEE Sensors Journal 21, no. 2 (2021): 1424–32. http://dx.doi.org/10.1109/jsen.2020.3019260.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Shuraiji, Ahlam Luaibi. "The effect of static and dynamic eccentricities on the performance of flux reversal permanent magnet machine." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (2020): 634. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp634-640.

Full text

Abstract:

This study investigates the effect of static and dynamic eccentricities on the performances of flux reversal permanent magnet (FRPM) machine with even rotor pole number, i.e. FRPM machine with 12/10 stator/rotor combination. No-load and load performances of the machine are investigated under three rotor operating conditions including centricity, static eccentricity and dynamic eccentricity. The investigation has been carried out using 2D-FEA. It has been revealed that the 12/10 FRPM machine under normal operating condition has no unbalanced magnetic force, due to the even pole number of the ro

APA, Harvard, Vancouver, ISO, and other styles

13

Pérez, Ramón, Jérôme Cros, and Mathieu Picard. "Real-Time Modeling of Static, Dynamic and Mixed Eccentricity in Permanent Magnet Synchronous Machines." Machines 13, no. 2 (2025): 120. https://doi.org/10.3390/machines13020120.

Full text

Abstract:

Eccentricity faults are one of the main causes that significantly affect the performance of permanent magnet synchronous machines (PMSMs). Monitoring eccentricity in real time could prevent failures by adapting operation conditions and maintenance schedule when early signs of deterioration are detected. This article proposes making a circuit-type model of a permanent magnet machine with an easily configurable eccentricity for simulations and real-time analysis of signals under different operating conditions. The basis for the construction of the circuit model will be the simulation of the PMSM

APA, Harvard, Vancouver, ISO, and other styles

14

Zhu, Rui, Xin Tong, Qingpeng Han, Keyuan He, Xinrou Wang, and Xuechao Wang. "Calculation and Analysis of Unbalanced Magnetic Pull of Rotor under Motor Air Gap Eccentricity Fault." Sustainability 15, no. 11 (2023): 8537. http://dx.doi.org/10.3390/su15118537.

Full text

Abstract:

Due to various factors such as manufacturing, assembly and operation, the motor air gap will be uneven in the circumferential direction, resulting in the air gap eccentricity having a longer air gap on one side and a shorter air gap on the other side, which affects the normal operation and service life of the motor. This paper analyzed and compared the applicability of linear and nonlinear calculation methods of unbalanced magnetic pull. Based on the method of finite element analysis, the unbalanced magnetic pull of motor rotor under static eccentricity, dynamic eccentricity and compound eccen

APA, Harvard, Vancouver, ISO, and other styles

15

Karami, Mahdi, Norman Mariun, Kadir Ab, Radzi Mohd, and Norhisam Misron. "Analysis of rotor asymmetry fault in three-phase line start permanent magnet synchronous motor." Facta universitatis - series: Electronics and Energetics 34, no. 4 (2021): 483–98. http://dx.doi.org/10.2298/fuee2104483k.

Full text

Abstract:

This article proposed a detection scheme for three-phase Line start permanent magnet synchronous motor (LSPMSM) under different levels of static eccentricity fault. Finite element method is used to simulate the healthy and faulty LSPMSM with different percentages of static eccentricity. An accurate laboratory test experiment is performed to evaluate the proposed index. Effects of loading condition on LSPMSM are also investigated. The fault related signatures in the stator current are identified and an effective index for LSPMSM is proposed. The simulation and experimental results indicate that

APA, Harvard, Vancouver, ISO, and other styles

16

He, Yu-Ling, Meng-Qiang Ke, Fa-Lin Wang, Gui-Ji Tang, and Shu-Ting Wan. "EFFECT OF STATIC ECCENTRICITY AND STATOR INTER-TURN SHORT CIRCUIT COMPOSITE FAULT ON ROTOR VIBRATION CHARACTERISTICS OF GENERATOR." Transactions of the Canadian Society for Mechanical Engineering 39, no. 4 (2015): 767–81. http://dx.doi.org/10.1139/tcsme-2015-0061.

Full text

Abstract:

This paper investigates the radial rotor vibration characteristics under static air-gap eccentricity and stator inter-turn short circuit composite faults. The air-gap magnetic flux density is firstly deduced to obtain the unbalanced magnetic pull (UMP) on rotor. Then the rotor vibration characters, as well as the developing trend between the faulty parameters and the vibration amplitudes, are analyzed. Finally, the experiments are taken on a SDF-9 type simulating generator. It is shown that the radial deformation possibility, the 2nd, 4th, and 6th harmonic vibrations will be caused by the comp

APA, Harvard, Vancouver, ISO, and other styles

17

Qian, Kun Xi, and Teng Jing. "Route Chart to Stabilizing Permanent Maglev Rotator." Advanced Materials Research 785-786 (September 2013): 1586–89. http://dx.doi.org/10.4028/www.scientific.net/amr.785-786.1586.

Full text

Abstract:

Permanent maglev has been since long recognized to be unstable because of Earnshaw's theory, which theoretically proved that permanent maglev can not achieve stable equilibrium in static state. How about that in dynamic state, for example, about a rotator, nobody has given an answer until now actually. A permanent maglev pump and a permanent maglev turbine have been developed, by using a patented permanent magnetic bearing developed by the author. Experiments demonstrated, there is a critic speed either in the pump or in the turbine, under which the rotors in the pump and the turbine have a ma

APA, Harvard, Vancouver, ISO, and other styles

18

Lee, Hoon Ki, Tae Kyoung Bang, Jong Hyeon Woo, Hyo Seob Shin, and Jang Young Choi. "Electromagnetic Characteristic Analysis of Permanent Magnet Synchronous Machine Considering Current Waveform According to Static Rotor Eccentricity." Applied Sciences 10, no. 23 (2020): 8453. http://dx.doi.org/10.3390/app10238453.

Full text

Abstract:

In this study, we performed an electromagnetic characteristic analysis of a permanent magnet synchronous machine considering the current waveform based on static rotor eccentricity. First, the characteristics of the back electromotive force were analyzed through the no-load analysis of the analysis model according to static rotor eccentricity. Next, a dynamic analysis was performed through mathematical modeling of a permanent magnet synchronous motor and PWM method. The input current during operation was derived through the dynamic analysis, and the core loss analysis was performed using deriv

APA, Harvard, Vancouver, ISO, and other styles

19

Nässelqvist, Mattias, Rolf Gustavsson, and Jan-Olov Aidanpää. "Experimental and Numerical Simulation of Unbalance Response in Vertical Test Rig with Tilting-Pad Bearings." International Journal of Rotating Machinery 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/309767.

Full text

Abstract:

In vertically oriented machines with journal bearing, there are no predefined static radial loads, such as dead weight for horizontal rotor. Most of the commercial software is designed to calculate rotordynamic and bearing properties based on machines with a horizontally oriented rotor; that is, the bearing properties are calculated at a static eccentricity. For tilting-pad bearings, there are no existing analytical expressions for bearing parameters and the bearing parameters are dependent on eccentricity and load angle. The objective of this paper is to present a simplified method to perform

APA, Harvard, Vancouver, ISO, and other styles

20

Du, Jianmin, and Yan Li. "Analysis on the Variation Laws of Electromagnetic Force Wave and Vibration Response of Squirrel-Cage Induction Motor under Rotor Eccentricity." Electronics 12, no. 6 (2023): 1295. http://dx.doi.org/10.3390/electronics12061295.

Full text

Abstract:

Aiming to address the rotor eccentricity problem caused by various factors, such as manufacturing, operation and the mass imbalance of the induction motor, the variation law of electromagnetic force wave and vibration response under rotor eccentricity during no-load operation is investigated. To begin with, on the basis of the air-gap permeability, the air-gap magnetic density components under static and dynamic eccentricity are analyzed by using the analytical method. The order and amplitude expressions of the radial electromagnetic force generated by the interaction of harmonics are obtained

APA, Harvard, Vancouver, ISO, and other styles

21

Mahdiuon-Rad, S., S. R. Mousavi-Aghdam, M. Reza Feyzi, and M. B. B. Sharifian. "Analysis of PM Magnetization Field Effects on the Unbalanced Magnetic Forces due to Rotor Eccentricity in BLDC Motors." Engineering, Technology & Applied Science Research 3, no. 4 (2013): 461–66. http://dx.doi.org/10.48084/etasr.296.

Full text

Abstract:

This paper investigates both static and dynamic eccentricities in single phase brushless DC (BLDC) motors and analyzes the effect of the PM magnetization field on unbalanced magnetic forces acting on the rotor. Three common types of PM magnetization field patterns including radial, parallel and sinusoidal magnetizations are considered. In both static and dynamic eccentricities, harmonic components of the unbalanced magnetic forces on the rotor are extracted and analyzed. Based on simulation results, the magnetization fields that produce the lowest and highest unbalanced magnetic forces are det

APA, Harvard, Vancouver, ISO, and other styles

22

Hoang Ho, Truc, Nattapon Chayopitak, Ruchao Pupadubsin, Nattawoot Depaiwa, and Takushi Saito. "Effects of Rotor Eccentricity on Interior Permanent Magnet Motor Performance in Electric Vehicles." Journal of Physics: Conference Series 2949, no. 1 (2025): 012043. https://doi.org/10.1088/1742-6596/2949/1/012043.

Full text

Abstract:

Abstract Interior Permanent Magnet (IPM) motors are a popular choice in electric vehicle (EV) powertrains because of their high efficiency, compact size, and controllability. Rotor eccentricity remains a significant challenge because it introduces unbalanced magnetic forces, which increase vibrations, noise, and the risk of premature motor failure. This study investigated the effects of static, dynamic, and mixed eccentricity on the performance of IPM motors and explored how numerical analysis can aid in fault detection during the design and diagnostic phases. This study aims to explore eccent

APA, Harvard, Vancouver, ISO, and other styles

23

ZARETSKIY, R. K. "COMPARATIVE ANALYSIS OF DIFFERENT ROTARY CONTROL SYSTEMS." Fundamental and Applied Problems of Engineering and Technology 6 (2020): 86–93. http://dx.doi.org/10.33979/2073-7408-2020-344-6-86-93.

Full text

Abstract:

This article provides a comparative analysis of various control systems for a rotor system on fluid friction bearings. The control was carried out on the basis of the criterion of the minimum friction moment, the controlled parameter was the bearing stiffness coefficients. The following control methods were compared in terms of friction torque and rotor eccentricity: STATIC, PID, DQN, DDPG, Q-Learning and SARSA. The control systems were guided by the following observed parameters: the values of coordinates and velocities along the x, y axes, as well as the frictional moment and relative eccent

APA, Harvard, Vancouver, ISO, and other styles

24

He, Yu-Ling, Wei-Qi Deng, Gui-Ji Tang, Xiao-Ling Sheng, and Shu-Ting Wan. "Impact of Different Static Air-Gap Eccentricity Forms on Rotor UMP of Turbogenerator." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/5284815.

Full text

Abstract:

Theoretical analysis and numerical FEM calculations, together with segmental experiment studies, are used to study the impact of the static air-gap eccentricity forms on the rotor unbalanced magnetic pull (UMP) of turbogenerator. The universal expression of the magnetic flux density under different forms of SAGE is firstly deduced, based on which the detailed UMP formulas for the normal condition and three SAGE cases are obtained, respectively. Then the exciting characteristics of the UMP for each SAGE form to generate vibrations are analyzed. Finally, numerical FEM calculations and segmental

APA, Harvard, Vancouver, ISO, and other styles

25

Abderrahim, Touil, Babaa Fatima, Bennis Ouafae, and Kratz Frederic. "Analytical Model for Separated Frequency Signature of Outer Race Bearing Fault From Static Eccentricity." International Journal of Circuits, Systems and Signal Processing 15 (January 11, 2022): 1821–27. http://dx.doi.org/10.46300/9106.2021.15.196.

Full text

Abstract:

The present paper addresses a precise and an accurate mathematical model for three-phase squirrel cage induction motors, based on winding function theory. Through an analytical development, a comparative way is presented to separate the signature between the existence of the outer race bearing fault and the static eccentricity concerning the asymmetry of the air gap between the stator and the rotor. This analytical model proposes an effective signature of outer race defect separately from other signatures of static eccentricity. Simulation and experimental results are presented to validate the

APA, Harvard, Vancouver, ISO, and other styles

26

Vaskovskiy, Yuriy, Alexandr Geraskin, and Konstantin Tatarinov. "Research of dampher system damage physical processes of synchronous machines rotor." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 2 (6) (December 9, 2021): 19–24. http://dx.doi.org/10.20998/2079-3944.2021.2.04.

Full text

Abstract:

The physical processes in the damper system of the rotor with the appearance of a static eccentricity of the rotor for two types of salient-pole synchronous machines - a capsule hydrogenator SGK 538/160-70M with a capacity of 22 MW and a synchronous generator with a capacity of 500 kW were investigated by means of mathematical modeling. A field mathematical model has been developed that takes into account the combined action of three physical fields of different nature: electromagnetic, temperature and field of thermomechanical stresses, and makes it possible to evaluate the heating and three-

APA, Harvard, Vancouver, ISO, and other styles

27

Li, Shanle, Feng Liu, Hongyan Wang, Haijun Song, and Kuilong Yu. "Nonlinear Vibration Analysis of Rotor considering Cogging and Harmonic Effects." Shock and Vibration 2021 (March 4, 2021): 1–16. http://dx.doi.org/10.1155/2021/6685588.

Full text

Abstract:

This paper aims to investigate nonlinear vibration characteristics of rotor system considering cogging and harmonic effects. Firstly, relative permeance with eccentric was established and then corrected by correction factor caused by the cogging effect. Based on the new formula of relative permeance, the expression of unbalanced magnetic force was obtained, and the coefficient of cogging effect was defined. Motion equations of rotor system were established, and Runge–Kutta method was used to solve the equations. Results showed that errors between finite and analytical results were smaller cons

APA, Harvard, Vancouver, ISO, and other styles

28

Sun, Dan, Sheng-Yuan Li, Huan Zhao, and Cheng-Wei Fei. "Numerical Investigation on Static and Rotor-Dynamic Characteristics of Convergent-Tapered and Divergent-Tapered Hole-Pattern Gas Damper Seals." Materials 12, no. 14 (2019): 2324. http://dx.doi.org/10.3390/ma12142324.

Full text

Abstract:

To study the influence of taper seal clearance on the static and rotor-dynamic characteristics of hole-pattern damper seals, this paper develops three-dimensional transient computational fluid dynamic methods, which comprise single-frequency and multi-frequency elliptical orbit whirl model, by the transient solution combined with a mesh deformation technique. Through the investigations, it is illustrated that: (1) In the present paper, the leakage rates of convergent-tapered hole-pattern damper seals are less than divergent-tapered hole-pattern damper seals for the same average seal clearance,

APA, Harvard, Vancouver, ISO, and other styles

29

Feng, Hui-Hui, Chun-Dong Xu, and Jie Wan. "Mathematical Model and Analysis of the Water-Lubricated Hydrostatic Journal Bearings considering the Translational and Tilting Motions." Mathematical Problems in Engineering 2014 (2014): 1–15. http://dx.doi.org/10.1155/2014/353769.

Full text

Abstract:

The water-lubricated bearings have been paid attention for their advantages to reduce the power loss and temperature rise and increase load capacity at high speed. To fully study the complete dynamic coefficients of two water-lubricated, hydrostatic journal bearings used to support a rigid rotor, a four-degree-of-freedom model considering the translational and tilting motion is presented. The effects of tilting ratio, rotary speed, and eccentricity ratio on the static and dynamic performances of the bearings are investigated. The bulk turbulent Reynolds equation is adopted. The finite differen

APA, Harvard, Vancouver, ISO, and other styles

30

Kupriyanov, Ivan, and Anatoly Lukyanov. "Mathematical and Natural Modeling of Oscillations in Induction Motors with Static Rotor Eccentricity." System Analysis & Mathematical Modeling 5, no. 4 (2023): 425–41. http://dx.doi.org/10.17150/2713-1734.2023.5(4).425-441.

Full text

Abstract:

The article discusses the issues of improving the quality of diagnostics of induction motors in the presence of static rotor eccentricity (uneven air gap). In the process of assembly and repair of an induction electric drive, violations of the manufacturing and assembly technology may occur, in particular, the displacement of the rotor axis relative to the stator axis. This defect can also occur when the rotor bearings are worn. When operating and repairing asynchronous electric motors according to the actual state, reliable diagnostic information plays an important role, in particular, on vib

APA, Harvard, Vancouver, ISO, and other styles

31

Petryna, Janusz, Arkadiusz Duda, and Maciej Sułowicz. "Eccentricity in Induction Machines—A Useful Tool for Assessing Its Level." Energies 14, no. 7 (2021): 1976. http://dx.doi.org/10.3390/en14071976.

Full text

Abstract:

In the condition monitoring of induction machines operating in various industry sectors, the assessment of eccentricity is as important as the assessment of the condition of windings, bearings, mechanical vibrations or noise. The reasons for the eccentricity can be various; for example, rotor imbalance, damage or wear of the bearings, improper alignment of the rotor and the load machine and finally, assembly errors after overhaul. Disregard of this phenomenon during routine tests may result in the development of vibrations transmitted to the stator windings, faster wear of the bearings and eve

APA, Harvard, Vancouver, ISO, and other styles

32

Kruchinina, Irina Yu, Yuvenaliy Khozikov, Alexandr Liubimtsev, and Valentina Paltceva. "Harmonic losses in high-speed PM synchronous machines." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 36, no. 3 (2017): 683–91. http://dx.doi.org/10.1108/compel-09-2016-0401.

Full text

Abstract:

Purpose The purpose of this paper is the development of a new numerical method for the calculation of the air-gap magnetic flux harmonics in synchronous machines with permanent magnet (PM) excitation. The harmonic analysis results are used as input data for the eddy-current loss calculation and for the rotor heating evaluation. Design/methodology/approach The method is based on the finite element analysis (FEA). The model takes into account toothed stator design, rotor asymmetrical magnetic reluctance and saturation. At first, a series of static DC magnetic (magnetostatic) simulations is run.

APA, Harvard, Vancouver, ISO, and other styles

33

Liu, Yi, Heng Liu, and BoWen Fan. "Nonlinear dynamic properties of disk-bolt rotor with interfacial cutting faults on assembly surfaces." Journal of Vibration and Control 24, no. 19 (2017): 4369–82. http://dx.doi.org/10.1177/1077546317724602.

Full text

Abstract:

Interfacial cutting faults on assembly surfaces are considered in a three-dimensional (3D) disk-bolt rotor system. The traditional finite element method is used to establish the 3D model of faulted disk-bolt rotor. A contact algorithm is applied to calculate the static features of this combined rotor. It is revealed that interfacial cutting faults produce rotor bending which is gradually strengthened as rotational speed increases besides disk’s mass eccentricity. The 3D dynamic equations of a faulted disk-bolt rotor system include these cutting faults’ static influences. The nonlinear dynamic

APA, Harvard, Vancouver, ISO, and other styles

34

Belyaev, P. V., A. P. Golovskii, and D. S. Sadaev. "THE MATHEMATICAL MODEL OF ASYNCHRONOUS MACHINE WITH THE ROTOR STATIC ECCENTRICITY." Dynamics of Systems, Mechanisms and Machines 7, no. 2 (2019): 010–18. http://dx.doi.org/10.25206/2310-9793-7-2-10-18.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Shakouhi, Mohammad, Mustafa Mohamadian, and Ebrahim Afjei. "Fault-Tolerant Control of Brushless DC Motors Under Static Rotor Eccentricity." IEEE Transactions on Industrial Electronics 62, no. 3 (2015): 1400–1409. http://dx.doi.org/10.1109/tie.2014.2365439.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Zhang, Chao, Chuang-Jin He, Shuai Li, et al. "A Hybrid Method to Diagnose 3D Rotor Eccentricity Faults in Synchronous Generators Based on ALIF_PE and KFCM." Mathematical Problems in Engineering 2021 (May 31, 2021): 1–14. http://dx.doi.org/10.1155/2021/5513881.

Full text

Abstract:

This paper proposed a new hybrid diagnosis method for the generator’s 3D static eccentricity faults which include the axial eccentricity, the radial eccentricity, and the mixed eccentricity composed of the former two. Firstly, adaptive local iterative filtering (ALIF) method was used to decompose the vibration signals of the generator under eccentricity faults. Then, in order to figure out the intrinsic mode function (IMF) components with the upmost feature information, the correlation coefficient was calculated. Finally, the components’ permutation entropy (PE) is extracted to construct the e

APA, Harvard, Vancouver, ISO, and other styles

37

Jiang, Hong-Chun, Gui-Ji Tang, Yu-Ling He, Kai Sun, Wei-Jun Li, and Lun Cheng. "Effect of Static Rotor Eccentricity on End Winding Forces and Vibration Wearing." International Journal of Rotating Machinery 2021 (March 29, 2021): 1–14. http://dx.doi.org/10.1155/2021/5554914.

Full text

Abstract:

In order to study the vibration wearing regularity and the strength failure point of stator end windings before and after static rotor eccentricity, the three-dimensional electromagnetic forces and the subsequent mechanical responses are studied in this paper. The electromagnetic force, stress, and deformation on the end winding of the QFSN-600-2YHG turbo-generator are calculated by the finite element method (FEM) through an electromagnetic-structure coupling. The radial vibration characteristics of the winding are verified by experiments. It shows that the vibration wearing in the same layer

APA, Harvard, Vancouver, ISO, and other styles

38

Li, Fengqin, Lulu Zhai, Baoling Cui, Jia Guo, and Guoyou Chen. "Investigation of the Dynamic Characteristics of an Eccentric Annular Seal on the Basis of a Transient CFD Method with Three Whirl Models." Journal of Marine Science and Engineering 9, no. 11 (2021): 1290. http://dx.doi.org/10.3390/jmse9111290.

Full text

Abstract:

Many annular seals suffer eccentricity because of rotor–stator misalignment or the deflection of a flexible rotor, which has a strong influence on the vibration characteristics and stability of rotating machines. In this article, a transient CFD method based on three whirl models is employed to research the dynamic characteristics of annular seals at various static eccentricities. The influence of the whirl amplitude on the dynamic characteristics of eccentric annular seals are also explored. The results of the transient CFD method are compared with the bulk flow model results and the experime

APA, Harvard, Vancouver, ISO, and other styles

39

Siew, C. C., M. Hill, R. Holmes, and M. J. Brennan. "Reduced-order modelling methods to assess the overall vibration response of a flexible rotor-squeeze film damper bearing assembly." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 216, no. 11 (2002): 1081–97. http://dx.doi.org/10.1243/095440602761609452.

Full text

Abstract:

This paper uses two reduced-order methods to calculate the overall non-linear vibration response of a multi-mode rotor-squeeze film damper (SFD) bearing assembly. Good agreement has been found between their computed results and those calculated by the conventional Runge-Kutta-Merson method (RKMM), yet they require less than 5 per cent of the computing time consumed by the RKMM. They are applied to compute the vibration response, three-dimensional deflection shape and the overall vibrational kinetic energy of the rotor-bearing assembly. The assembly is simulated under various operating conditio

APA, Harvard, Vancouver, ISO, and other styles

40

Soulas, Thomas, and Luis San Andres. "A Bulk Flow Model for Off-Centered Honeycomb Gas Seals." Journal of Engineering for Gas Turbines and Power 129, no. 1 (2002): 185–94. http://dx.doi.org/10.1115/1.2227031.

Full text

Abstract:

A computational analysis for prediction of the static and dynamic forced performance of gas honeycomb seals at off-centered rotor conditions follows. The bulk-flow analysis, similar to the two-control volume flow model of Kleynhans and Childs (1997, “The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals,” ASME J. Eng. Gas Turbines Power, 119, pp. 949–957), is brought without loss of generality into a single-control volume model, thus simplifying the computational process. The formulation accommodates the honeycomb effective

APA, Harvard, Vancouver, ISO, and other styles

41

Jiang, Hong-Chun, Yu-Ling He, Gui-Ji Tang, and Xing-Hua Yuan. "Electromagnetic Force and Mechanical Response of Turbo-Generator End Winding under Electromechanical Faults." Mathematical Problems in Engineering 2021 (December 23, 2021): 1–19. http://dx.doi.org/10.1155/2021/9064254.

Full text

Abstract:

This paper comparatively studies the electromagnetic force and mechanical response of the end winding before and after 3 kinds of typical electromechanical faults in turbo-generator. The analytical expression of electromagnetic force of end winding is derived under the composite fault of static eccentricity and rotor interturn short circuit. Meanwhile, the three-dimensional transient finite element simulation is carried on, and the frequency composition and amplitude variation characteristics of the radial, axial, and tangential electromagnetic force are analyzed for the end windings under sta

APA, Harvard, Vancouver, ISO, and other styles

42

Ruf, Andreas, Michael Schröder, Aryanti Kusuma Putri, Roman Konrad, David Franck, and Kay Hameyer. "Analysis and determination of mechanical bearing load caused by unbalanced magnetic pull." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 728–43. http://dx.doi.org/10.1108/compel-03-2015-0111.

Full text

Abstract:

Purpose – The purpose of this paper is to focus on the mechanical bearing load caused by the unbalanced magnetic pull (UMP), which is studied in detail. The applied approach is based on an analysis of static and dynamic eccentricities at different positions and different amplitudes. The influence of the operating points is calculated to show the effective bearing load for machines operating at different speeds. The decreasing lifetime of the applied bearings is examined and evaluated in detail. Design/methodology/approach – To evaluate the proposed methodology a permanent magnet synchronous ma

APA, Harvard, Vancouver, ISO, and other styles

43

Grinek, AV, IP Boychuk, A. M. Fishenko, NV Savosteenko, and O. N. Gerasimenko. "Investigation of the operation of a ship’s synchronous generator based on a numerical model." Journal of Physics: Conference Series 2061, no. 1 (2021): 012004. http://dx.doi.org/10.1088/1742-6596/2061/1/012004.

Full text

Abstract:

Abstract The article presents the results of modeling a ship’s synchronous generator. Based on preliminary design calculations, a geometric model of the generator was built. The static and overclocking processes of the generator are investigated. For static modes, the frequency response of the process is obtained. A numerical model was used to identify a mechanical defect. On the example of a simulated defect of an electrical machine - the eccentricity of the generator rotor, the signature of the defect signal is obtained. The study revealed that the presence of rotor eccentricity leads to the

APA, Harvard, Vancouver, ISO, and other styles

44

Werner, Ulrich. "Theoretical rotor dynamic analysis of two-pole induction motors regarding excitation due to static rotor eccentricity." Archive of Applied Mechanics 81, no. 2 (2010): 241–62. http://dx.doi.org/10.1007/s00419-010-0413-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Wei, Kaijun, Shuguang Zuo, Huijuan He, and Zhe Wang. "Study on the aerodynamic noise of centrifugal compressors with rotor static eccentricity." Journal of the Acoustical Society of America 135, no. 4 (2014): 2406. http://dx.doi.org/10.1121/1.4877967.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Alexander, C. R., D. W. Childs, and Z. Yang. "Theory Versus Experiment for the Rotordynamic Characteristics of a Smooth Annular Gas Seal at Eccentric Positions." Journal of Tribology 117, no. 1 (1995): 148–52. http://dx.doi.org/10.1115/1.2830591.

Full text

Abstract:

Experimental results are presented for the rotordynamic coefficients of a smooth gas seal at eccentricity ratios out to 0.5. The effects of speed, inlet pressure, pressure ratio, fluid prerotation, and eccentricity are investigated. The experimental results show that direct stiffness KXX decreases significantly, while direct damping and cross-coupled stiffness increase with increasing eccentricity. The whirl-frequency ratio, which is a measure of rotordynamic instability, increases with increasing eccentricity at 5000 rpm with fluid prerotation. At 16,000 rpm, the whirl-frequency ratio is inse

APA, Harvard, Vancouver, ISO, and other styles

47

Cao, Xue, Sen Yan, and Chunming Lv. "Research on Influence of Eccentricity on Submersible Motor and its Solution." International Journal of Energy 3, no. 1 (2023): 1–5. http://dx.doi.org/10.54097/ije.v3i1.9793.

Full text

Abstract:

The working efficiency and stability of submersible motor are very important for energy utilization, and dynamic eccentricity is the main factor affecting its efficiency and fatigue life. This paper takes a 2-pole 60kW vertical three-phase cage induction motor with static eccentricity as the research object. Through finite element analysis, the mechanical structure and coordination of submersible motor shaft and spiral pump are analyzed. The influence caused by motor shaft eccentricity is regarded as external interference received by the system. The idea of auto disturbance rejection controlle

APA, Harvard, Vancouver, ISO, and other styles

48

Qiu, Z. L., and A. K. Tieu. "Misalignment Effect on the Static and Dynamic Characteristics of Hydrodynamic Journal Bearings." Journal of Tribology 117, no. 4 (1995): 717–23. http://dx.doi.org/10.1115/1.2831542.

Full text

Abstract:

This paper solves the Reynolds equation by the finite difference method in a fixed coordinate system with the static load acted in the vertical direction. All static and dynamic characteristics (including load capacity, attitude angle, side flow, friction force, misaligned moments, and eight linear force coefficients) of a horizontally grooved bearing under different eccentricity and misalignment conditions are presented and compared with available experimental data. The effects of misalignment on all these bearing characteristics and on the stability of the rotor-bearing system are analyzed.

APA, Harvard, Vancouver, ISO, and other styles

49

Crâştiu, Ion, Liviu Bereteu, and Dorin Simoiu. "Determination of the Eccentricity of a Rotor by Impulse Excitation Technique of Vibration." Applied Mechanics and Materials 801 (October 2015): 176–81. http://dx.doi.org/10.4028/www.scientific.net/amm.801.176.

Full text

Abstract:

The aim of this paper is the development and validation of an impulse excitation technique to determine static imbalance of a rotor. The experimental measurement of the vibroacustic response is carried out by using a condenser microphone. In determining the center of mass three measurements are needed: one in plane flexure, and other out of the plane flexure, to which is added a measurement for a balanced rotor. By the means of Finite Element Method (FEM), the natural frequencies and shape modes of two rotor specimens are determined. The analysis is carried out in balanced condition as well as

APA, Harvard, Vancouver, ISO, and other styles

50

Zhao, J. Y., and E. J. Hahn. "Subharmonic, Quasi-Periodic and Chaotic Motions of a Rigid Rotor Supported by an Eccentric Squeeze Film Damper." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 207, no. 6 (1993): 383–92. http://dx.doi.org/10.1243/pime_proc_1993_207_145_02.

Full text

Abstract:

This paper analyses the complexity of the unbalance response possible with a simple rigid rotor supported by an eccentric squeeze film damper. The damper forces are obtained from the ‘π’ film short bearing approximation to the Reynolds equation and a fourth-order Runge-Kutta integration is used to evaluate the rotor response. Poincaré maps, rotor trajectories, bifurcation diagrams and power spectra are used to elucidate and to illustrate the diversity of the system behaviour. It is shown that for a large unbalance and static eccentricity ratio, the system can exhibit undesirable jump phenomeno

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!