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Relevant bibliographies by topics / Permanent magnet motors

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Academic literature on the topic 'Permanent magnet motors'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2024

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Journal articles on the topic "Permanent magnet motors"

1

Chang, Sungwoo, Noboru Niguchi, Je-Hoon Lee, and Katsuhiro Hirata. "Improvement of Torque Performance and Energy Density of PM-Type Vernier Motor Utilizing Saddle Coil and Salient Pole." Applied Sciences 11, no. 6 (March 22, 2021): 2818. http://dx.doi.org/10.3390/app11062818.

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In electric motors, the use of rare-earth magnets has been increasing rapidly. A stronger magnet force of the magnet enables the motor’s higher performance, resulting in the most high-performance motors generally using rare-earth magnets. However, these magnets have two crucial disadvantages: the potential restrictions on the supply of rare-earth magnetic materials and the sharp fluctuation in price. Thus, many recent researches focus on developing high-performance electric motors and reducing the use of critical rare-earth magnets. By increasing the torque density of the motor, we can reduce the use of permanent magnets. Focusing on this point, and we presented a double half permanent magnet (DHPM)-type vernier motor. This paper proposed a new saddle coil permanent magnet vernier motor with improved performance compared to its predecessor. The main feature of the proposed motor is that the permanent magnet and coil in the stator of a DHPM-type vernier motor is replaced by salient poles and saddle coils, respectively. We also investigate its characteristics through various simulations.

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Kaňuch, Ján, and Želmíra Ferková. "Design and simulation of disk stepper motor with permanent magnets." Archives of Electrical Engineering 62, no. 2 (June 1, 2013): 281–88. http://dx.doi.org/10.2478/aee-2013-0022.

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Abstract In this paper the design and the magneto-static simulation of axial-flux permanent- magnet stepper motor with the disc type rotor is presented. Disk motors are particularly suitable for electrical vehicles, robots, valve control, pumps, centrifuges, fans, machine tools and manufacturing. The brushless machine with axial flux and permanent magnets, also called the disc-type machine, is an interesting alternative to its cylindrical radial flux counterpart due to the disk shape, compact construction and high torque density. This paper describes a design of four phase microstepping motor with the disc type rotor. The FEM modeling and the 3D magneto-static simulation of the disk stepper motor with permanent magnets is being subject of the article, too. Disc rotor type permanent magnet stepper motor for high torque to inertia ratio is ideal for robotics and CNC machines.

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Bui, Minh Dinh, Duc Hung Bui, Viet Linh Trieu, and Quoc Vuong Dang. "Improved Torque and Efficiency of Induction Motors by Changing Rotor Structure of Permanent Magnet Assistance Synchronous Reluctance Motors." Journal of Technical Education Science, no. 71A (August 30, 2022): 1–7. http://dx.doi.org/10.54644/jte.71a.2022.1145.

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Many authors have recently studied line start permanent magnet assistance synchronous reluctance. This paper presents a method to improve the electromagnetic torque and efficiency of induction motors of 7.5kW-4P (which consists of 36 stator slots and 40 rotor bars) by changing the design of the permanent magnet assistance synchronous reluctance rotors. This means that permanent magnets will be inserted to the squirrel cage induction motors (induction motors). The electromagnetic torque and efficiency of an induction motor is analyzed and compared with that of the line-start synchronous reluctance motor via a finite element analysis. In addition, the influence of position and length permanent magnets on the electromagnetic torque and efficiency of the line-start synchronous reluctance motor is also considered and simulated. The model of this motor Linh is finally designed with four U layered- magnet rotor to verify the developed method. The development of the method is also validated on the practical induction motor.

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Safin, Alfred, and Timur Petrov. "Topological optimization of the rotors of permanent magnet synchronous motors." E3S Web of Conferences 220 (2020): 01040. http://dx.doi.org/10.1051/e3sconf/202022001040.

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Permanent magnet synchronous motors are increasingly used in the oil industry. These motors need to be made more energy efficient. To do this, it is necessary to optimize the rotor of a synchronous motor by changing the design through topological optimization. Designing an electrical machine as a heuristic process does not guarantee finding the best solution. Methods are needed that complement the experience and intuition of the designer to find the optimal (rational) solution. Topological optimization is currently performed using the finite element method to reduce mass and improve the stiffness of structures. The proposed method allows you to transfer topological optimization to electromagnetic processes in permanent magnet synchronous motors to determine the direction of magnetization and the size of permanent magnets, for a given mass-dimensional parameters. Optimization of the rotor of a serial permanent magnet motor based on a genetic algorithm is proposed. A new topology of the rotor of the motor was calculated and an increase in the torque was obtained by 18.2%, which indicates that topological optimization is promising for synchronous motors with permanent magnets.

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Do, NY, TA Le, and XC Ngo. "Effect of Permanent Magnet Structure on The Performance of LSPMSM with a Power of 22 kW and 3000 rpm." IOP Conference Series: Earth and Environmental Science 1111, no. 1 (December 1, 2022): 012047. http://dx.doi.org/10.1088/1755-1315/1111/1/012047.

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Abstract Energy efficiency and sustainability are important goals for countries all over the world. With the advancement of material technology, many new generations of high-efficiency motors are being researched and developed to replace induction motors (IM) to save energy. Line-start permanent-magnet synchronous motors (LSPMSM) are high-performance and ultra-high-performance motors that are emerging as an alternative to squirrel-rotor induction motors. Constructing the permanent magnets in the rotor is critically important in ensuring LSPMSM performance. The study uses the finite element method to analyze the characteristics of the motor. The study presented the influence of the permanent magnet structure in the rotor of the LSPMSM with a power of 22 kW and a speed of 3000 rpm on the electromagnetic field distribution in the motor, as well as the motor’s working characteristics to optimize the permanent magnet structure to optimize the performance of the LSPMSM. The analysis results show that the proposed LSPMSM has a 92.6% higher efficiency than the same-type induction motor. This is a suitable replacement for high-power and high-speed IM, which contributes to energy efficiency, so using fewer fossil fuels to reduce environmental impact is a sustainable development solution.

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Nurmalia, Alif, Widyono Hadi, and Widya Cahyadi. "Performance Test of Three-Phase Brushless Direct Current Motor Axial Flux with Differences Diameter of Neodymium Type Permanent Magnet." ELKHA 13, no. 1 (April 20, 2021): 55. http://dx.doi.org/10.26418/elkha.v13i1.41693.

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Technology that is growing rapidly and innovations that have sprung up in the electrical field today are driving the use of electricity as a source of energy to do work. Electric motor is one component that is very popular in the industrial world and households that are useful to human life. In addition to DC motors and induction motors, there are also 3 phase brushless direct current (BLDC) motors which are a type of synchronous motor where magnetic fields are produced by rotor and stator at the same frequency. The rotor is a moving part of the brushless direct current motor which is a place of permanent magnet called a pole. This paper discusses the performance of brushless direct current 3 phase axial flux motors with different diameters of neodymium type permanent magnets. Tests carried out using neodymium permanent magnets with diameters of 15mm x 2mm and 20mm x 2mm were tested without using a load and using load. The parameters used in testing motor performance include speed, torque, and motor power with a source voltage of 12V, 16V, 20V, and 24V. The test results shows that the speed value of a BLDC motor using permanent magnets with a size of 20mm x 2mm is greater than that of permanent magnets of 15mm x 2mm. The same thing applies to the value of the power produced while, for the value of torque when the motor uses a permanent magnet of 15mm x 2mm will be greater than that of a motor using a permanent magnet of 20mm x 2mm.

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Manh, Tien Ho, Dinh Bui Minh, Tu Pham Minh, and Vuong Dang Quoc. "Investigation of the Influence of Skewed Slots and Degmagnetization Effects to Line Start Permanent Magnet Assistance Synchronous Reluctance Motors." Engineering, Technology & Applied Science Research 13, no. 1 (February 1, 2023): 9807–11. http://dx.doi.org/10.48084/etasr.5307.

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A permanent magnet assistance synchronous reluctance motor can start directly with a net voltage or a power converter via a torque control method. However, this motor has usually a higher irreversible demagnetization level in comparison with interior permanent magnet motors, due to the fewer permanent magnets in rotor slots. In order to cope with this disadvantage, different arrangements of permanent magnets in the rotor of the line-start permanent magnet assistance synchronous reluctance motor are proposed in this paper. The V magnet shape taking skewed slots and demagnetization effect into account with the short circuit current are investigated by the finite element approach. The efficiency, torque, and output power of the proposed model have been also improved. Finally, the rotor with 3V layered magnets is prototyped to verify the efficiency of the proposed motor.

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Minh, D. B., V. D. Quoc, and P. N. Huy. "Efficiency Improvement of Permanent Magnet BLDC Motors for Electric Vehicles." Engineering, Technology & Applied Science Research 11, no. 5 (October 12, 2021): 7615–18. http://dx.doi.org/10.48084/etasr.4367.

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A permanent magnet Brushless DC (BLDC) motor has been designed with different rotor configurations based on the arrangement of the permanent magnets. Rotor configurations strongly affect the torque and efficiency performance of permanent magnet electric motors. In this paper, different rotor configurations of the permanent magnet BLDC motor with parallel the Halbach array permanent magnet were compared and evaluated. Many applications of electric drives or air-crafts have recently preferred the surface-mounted permanent magnet design due to its ease of construction and maintenance. The finite element technique has been used for the analysis and comparison of different geometry parameters and rotor magnet configurations to improve efficiency and torque performance. A comprehensive design of a three-phase permanent magnet BLDC 35kW motor is presented and simulations were conducted to evaluate its design. The skewing rotor and Halbach magnet array are applied to the permanent surface-mounted magnet on the BLDC motor for eliminating torque ripples. In order to observe the skewing rotor effect, the rotor lamination layers were skewed with different angles and Halbach sinusoidal arrays. The determined skewing angle, the eliminated theoretically cogging torque, and the back electromotive force harmonics were also analyzed.

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Bi, Qing, and Dingguo Shao. "Loss Analysis of High-Speed Permanent Magnet Motor for Cordless Vacuum Cleaner." Journal of Physics: Conference Series 2488, no. 1 (May 1, 2023): 012021. http://dx.doi.org/10.1088/1742-6596/2488/1/012021.

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Abstract Compared with traditional permanent magnet motors, high-speed permanent magnet motors (HSPMM) have the advantages of fast dynamic response, high efficiency, high reliability, small size, etc. Therefore, HSPMM has been widely used in household and industrial fields, and the research on high-speed permanent magnet motors has become a hot spot in the motor industry. In this paper, the high-speed permanent magnet motor is applied to the cordless vacuum cleaner, and the calculation and analysis of the iron loss and copper loss of the high-speed permanent magnet motor are emphatically studied for the HSPMM used in the cordless vacuum cleaner.

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Panchal, T. H., A. N. Patel, and R. M. Patel. "Reduction of cogging torque of radial flux permanent magnet brushless DC motor by magnet shifting technique." Electrical Engineering & Electromechanics, no. 3 (May 30, 2022): 15–20. http://dx.doi.org/10.20998/2074-272x.2022.3.03.

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Introduction. In spite of many advantages of radial flux permanent magnet brushless DC motors it suffers from the distinct disadvantage of high cogging torque. The designer must emphasize to reduce the cogging torque during the design stage. This paper introduces magnet shifting technique to mitigate cogging torque of surface mounted radial flux brushless DC motor. Methodology. Initially 200 W, 1000 rpm surface mounted radial flux permanent magnet brushless DC motor is designed with symmetrical placement of permanent magnets with respect to each other on rotor core. Cogging torque profile of this initial motor is obtained by performing finite element modelling and analysis. Originality. This design has been improved by shifting the position of permanent magnets with respect to adjacent permanent magnets. The effect of magnet shifting on cogging torque has been analyzed by performing finite element analysis. Results. It has been examined that the peak to peak cogging torque is decreased from 1.1 N×m to 0.6 N×m with shifting of permanent magnets respectively.

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Dissertations / Theses on the topic "Permanent magnet motors"

1

Devgan, S. K. "Permanent magnet synchronous motors." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235056.

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Varghese, Sajan. "Electromagnetic Noise from Permanent Magnet Motors." Thesis, KTH, Farkost och flyg, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-143492.

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With today’s increase in rail traffic the impact of noise on the people near railway lines is increasing. To control this problem European Union regulations, including TSI (Technical Specifications for Interoperability) Noise, has come into force by implementing many strict norms on new railway vehicles put on the market. One TSI regulation is limiting the acceleration noise, which in turn calls for low noise solutions for drive systems which typically governs the vehicle noise at low speeds, up to around 80 Km/hr. This regulation on railway noise has become a major challenge for many train manufacturers. This calls for electromagnetic-Vibration-Acoustics multi physics analysis of the motor. The thesis mainly focuses on numerical modelling of the electromagnetic-vibro-acoustics system. Ideally such models can compute the audible magnetic sound power radiated from the motor as a function of its speed, PWM strategy applied and geometry. Here a pulse modulated permanent magnet traction motor was modelled with finite elements (FE), using a commercial software. Thereafter, the dynamic characteristics of the motor was analysed by FE modal analysis (eigen-frequencies and eigen-modes) as well as by point force frequency response analysis. The FE model was validated by comparing the Eigen-modes, Eigen-frequencies and point accelerance with the experimental modal analysis results. Thereafter, frequency response analysis was performed to calculate the vibration velocities on the surface of the stator frame using realistic electromagnetic forces. These forces were calculated with a dedicated motor analysis tool (FLUX). Moreover, the vibration velocities calculated were used in boundary element model to calculate the radiated sound power and the directivity. Finally the calculated vibration and sound power levels were compared with measurement results.

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Patni, Chandra Kumar. "Digital control of permanent magnet motors." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47613.

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Bottomley, Jack S. "Self-sensing permanent magnet servo motors." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14179/.

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The use of Permanent Magnet Synchronous Machines (PMSMs) has become widespread across numerous applications and industries. Their high power density, efficiency and accuracy of control make them excellent choices, leading them to become the industrial standard. Two issues concerning PMSMs use in recent years have been associated with the elevated cost of rare earth materials required for the Permanent Magnet (PM) rotor poles and the reliance on a direct rotor position sensor such as an encoder. PMSMs require an accurate rotor position feedback within the control scheme, traditionally provided by an encoder or resolver. These devices are excellent at providing the realtime rotor position accurately but have a negative impact on the machine as a whole. Their use increases the size, weight and cost of the electrical machine, while reducing reliability and often limiting use in extreme environments. This has created motivation for sensorless control of PMSMs, which removes the need for a position sensor. Sensorless control can be categorized into two distinctive aspects. The first is the control scheme and focuses on how position dependent properties can be used to estimate rotor position. The second, which has had less focus, is the machine design. This is focused on the ability of a machine to act as a position sensor with clear position dependent properties. Self-sensing machine design is the common term applied to this field since in essence the machine acts as its own position sensor. This thesis is concerned with self-sensing oriented design. The work presented is focused on PMSMs with inset rotor topologies. A methodology was developed to assess the position tracking capability of a machine and incorporated within a traditional machine design optimization routine. The conceptual design of the machine emphasized a generic geometrical topology, accounting for practical material selections and construction techniques. This ensured the design outcome had widespread implications, as opposed to a novel machine design with limited commercial relevance.

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Parsa, Leila. "Performance improvement of permanent magnet ac motors." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2419.

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Multi-phase motors have several advantages over the traditional three-phase motors. In this study, the additional degrees of freedom available in five-phase permanent magnet motors have been used for three purposes: 1) enhancing the torque producing capability of the motor, 2) improving the reliability of the system, and 3) better adjusting of the torque and flux linkages of the five-phase direct torque controlled system. 1) Due to the fact that space and time harmonics of the same orders will contribute positively to output torque, a five-phase permanent magnet motor with quasi-rectangular back-EMF waveform is supplied with combined fundamental and third harmonic of currents. For modeling and analysis of the motor a 0 3 3 1 1 q d q d frame of reference is defined where 1 1q d rotates at the synchronous speed and 3 3q d rotates at the three times synchronous speed. Based on the mathematical model in the 0 3 3 1 1 q d q d frame of reference, it is shown that this system while having a higher torque density with respect to a conventional permanent magnet synchronous machine, is also compatible with vector control algorithm. 2) A resilient current control of the five-phase permanent motor with both sinusoidal and trapezoidal back-EMF waveforms under asymmetrical fault condition is proposed. In this scheme, the stator MMF is kept unchanged during healthy and faulty condition. Therefore, the five-phase permanent magnet motor operates continuously and steadily without additional hardware and just by modifying the control algorithm in case of loss of up to two phases. The feature is of major importance in some specific applications where high reliability is required. 3) High torque and flux ripple are the major drawbacks of a three-phase direct torque controlled system. The number of space voltage vectors directly influences the performance of DTC system. A five-phase drive, while benefiting from other advantages of high order phase drives, has inherently 32 space voltage vectors which permits better flexibility in selecting the switching states and finer adjustment of flux and torque. A sensorless direct torque control of five-phase permanent magnet motor is implemented. Speed information is obtained based on the position of stator flux linkages and load angle. Experiments have been conducted on a 5kW five-phase surface mount permanent magnet motor and a 3kW five-phase interior permanent magnet motor by using TMS320C32 DSP. The results obtained are consistent with theoretical studies and simulation analysis, which further demonstrate the feasibility and practical significance of the five-phase permanent magnet motor drives.

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Arvidsson, Amanda. "Generic Control of Permanent Magnet Synchronous Motors." Thesis, Linköpings universitet, Fysik och elektroteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110898.

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Mantala, Chawanakorn. "Sensorless control of brushless permanent magnet motors." Thesis, University of Bolton, 2013. http://ubir.bolton.ac.uk/625/.

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In this thesis, a sensorless control method of permanent magnet synchronous machines (PMSMs), whose machine neutral points are accessible, for all speeds and at standstill is proposed, researched and developed. The sensorless method is called Direct Flux Control (DFC). The different voltages between a machine neutral point and an artificial neutral point are required for the DFC method. These voltages are used to extract flux linkage signals as voltage signals, which are necessary to approximate electrical rotor positions by manipulating the flux linkage signals. The DFC method is a continuous exciting method and based on an asymmetry characteristic and machine saliencies. The DFC method is validated by implementing on both software and hardware implementation. A cooperative simulation with Simplorer for the driving circuit and programming the DFC and Maxwell for doing finite element analysis with the machine design is selected as the software simulation environment. The machine model and the DFC method are validated and implemented. Moreover, the influences of different machine structures are also investigated in order to improve the quality of the measured voltages. The hardware implementation has been employed on two test benches, i.e. for small machines and for big machines. Both test benches use a TriCore PXROS microcontroller platform to implement the DFC method. There are several PMSMs, both salient poles and non-salient poles, which are used to validate the DFC method. The flux linkage signals are also analyzed. The approximation of the flux linkage signal is derived and proposed. A technique to remove the uncertainty of the calculated electrical rotor position based on the inductance characteristics has been found and implemented. The electrical rotor position estimation method has been developed based on the found flux linkage signal approximation function and analyzed by comparing with other calculation techniques. Moreover, the calculated electrical rotor position is taken into account to either assure or show the relation with the exact rotor position by testing on the hardware environment. The closed loop speed sensorless control of PMSMs with DFC is presented and executed by using the assured calculated electrical rotor position to perform the DFC capability. This thesis has been done in the Electric Machines, Drives and Power Electronics Laboratory, South Westphalia University of Applied Sciences, Soest, Germany.

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Ede, Jason David. "High-speed permanent magnet brushless DC motors." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719807.

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Martin, Benjamin C. "Geometric Design Optimization of Brushless Permanent Magnet Motors." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/MartinBC2009.pdf.

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Elvestad, Eirik. "Implementation of Permanent Magnet Motors in Electric Vehicles." Thesis, Norwegian University of Science and Technology, Department of Electrical Power Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9743.

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This thesis has studied permanent magnet motors in electric vehicles (EVs) under the assumption that they are tractable due to a low weight and high compactness. The implementation has been investigated through a case study, which resulted in an EV simulation model. The model contains a maximal torque per ampere and a closed-loop field weakening controller. Abstract Faults are a special concern in permanent magnet motors. Fault sources and faulted behavior are addressed separately. The EV model was used to simulate faulted behavior. Abstract Two passive fault measures are suggested as the most attractive for propulsion purpose motors; these are shutting down the inverter and imposing a balanced short to the machine terminals. The balanced three phase short circuit showed a considerable transient behavior not seen during inverter shutdown. This results in an increased requirement to the inverter rating using the balanced short. Also, demagnetization risk of rotor magnets is higher under the balanced short. Abstract The maximal braking torque during inverter shutdown was high for the simulation model, and exceeded the braking torque of any fault. This concern led to a mathematical examination of the inverter shutdown, resulting in two equations that may be of use during design. The resulting equations are based on simplifications done in the literature, and show the relationship of the balanced short to the inverter shutdown.

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Books on the topic "Permanent magnet motors"

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Bai, Kun, and Kok-Meng Lee. Permanent Magnet Spherical Motors. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7.

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2

Permanent-magnet DC linear motors. Oxford: Clarendon Press, 1996.

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Hendershot, J. R. Design of brushless permanent magnet motors. Hillsboro, Ohio (PO Box 78, Hillsboro 45133): Magna Physics Corp., 1991.

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Hendershot, J. R. Design of brushless permanent-magnet motors. Oxford: Oxford University Press, 1994.

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Miller, T. J. E. 1947-, ed. Design of brushless permanent-magnet motors. Hillsboro, OH: Magna Pysics Pub., 1994.

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Hanselman, Duane C. Brushless permanent-magnet motor design. New York: McGraw-Hill, 1994.

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Kenjo, Takashi. Permanent-magnet and brushless DC motors. Oxford: Clarendon, 1985.

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Kenjō, Takashi. Permanent-magnet and brushless DC motors. Oxford: Clarendon Press, 1985.

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Nasar, S. A. Permanent magnet, reluctance, andself-synchronous motors. Boca Raton: CRC Press, 1993.

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I, Boldea, and Unnewehr L. E. 1925-, eds. Permanent magnet, reluctance, and self-synchronous motors. Boca Raton: CRC Press, 1993.

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Book chapters on the topic "Permanent magnet motors"

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Hanitsch, Rolf, and Nejila Parspour. "Exterior Permanent Magnet Motors." In Modern Electrical Drives, 79–113. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9387-8_6.

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Rahman, M. Azizur, and Ping Zhou. "Interior Permanent Magnet Motors." In Modern Electrical Drives, 115–40. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-015-9387-8_7.

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Gieras, Jacek F. "Permanent Magnet Brushless Motors." In Electrical Machines, 369–417. Boca Raton : CRC Press, 2017.: CRC Press, 2016. http://dx.doi.org/10.1201/9781315371429-8.

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Asadi, Farzin. "Brushed Permanent Magnet DC Motors." In ABCs of Electronics, 157–65. Berkeley, CA: Apress, 2024. http://dx.doi.org/10.1007/979-8-8688-0134-1_11.

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Bai, Kun, and Kok-Meng Lee. "Introduction." In Permanent Magnet Spherical Motors, 1–17. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7_1.

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Bai, Kun, and Kok-Meng Lee. "General Formulation of PMSMs." In Permanent Magnet Spherical Motors, 21–30. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7_2.

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Bai, Kun, and Kok-Meng Lee. "Distributed Multi-pole Models." In Permanent Magnet Spherical Motors, 31–80. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7_3.

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Bai, Kun, and Kok-Meng Lee. "PMSM Force/Torque Model for Real-Time Control." In Permanent Magnet Spherical Motors, 81–95. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7_4.

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Bai, Kun, and Kok-Meng Lee. "Field-Based Orientation Sensing." In Permanent Magnet Spherical Motors, 99–107. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7_5.

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Bai, Kun, and Kok-Meng Lee. "A Back-EMF Method for Multi-DOF Motion Detection." In Permanent Magnet Spherical Motors, 109–22. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7962-7_6.

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Conference papers on the topic "Permanent magnet motors"

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Liu, T. S., and Y. C. Chung. "A Novel Brushless Permanent Magnet Motor for Electric Scooters." In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/esda2014-20480.

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The purpose of this study is to design brushless permanent magnet DC motors for electric vehicles based on a pole-changing method. By generating a pulse when changing the number of poles, magnetization of magnets can be changed appropriately and the principle of pole-changing motors can be applied to permanent magnet machines. This kind of machine not only retains the feature of permanent magnet machines in efficiency, but also acquires wide speed range. In this study, a pole-changing method using common windings is proposed and performance of brushless permanent magnet DC pole-changing motors is investigated. According to T-N curves, the proposed brushless permanent magnet pole-changing motor yields larger starting torque and wider speed range than motors with a fixed number of poles.

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Hwang, Sangmoon, and Dennis K. Lieu. "Characterization and Reduction of Reluctance Torque in Permanent Magnet D.C. Motors." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0237.

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Abstract For motors with low speeds and loads, torque pulsation by the reluctance torque is an important source of vibration and control difficulty. In this paper, the magnetic field of a motor is calculated by finite element method and the periodic reluctance torque is determined using Maxwell stress method and time stepping method, and then decomposed using Fourier series expansion. The purpose of this paper is to characterize design parameters on the reluctance torque and to design a permanent magnet motor with a reluctance torque less vulnerable to vibration, without sacrificing the motor performance. The design parameters include stator slot width, permanent magnet slot width, airgap length and magnetization direction. A new design with a less populated frequency spectrum of the reluctance torque is proposed after characterizing individual effect of design parameters. Gradual magnetization, by gradually increasing the thickness of the permanent magnets at edges, yields a smooth shape for the reluctance torque with reduced harmonics.

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Wang, Xin, and C. Steve Suh. "Nonlinear Time-Frequency Control of Permanent Magnet Synchronous Motors." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67363.

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Permanent magnet synchronous motors are essential components in a wide range of applications in which their unique benefits are explored. However, in order for a permanent magnet synchronous motor to achieve satisfactory performance, particular control frameworks are essential. After all, permanent magnet synchronous motor is an AC machine, which is characterized by its complex structure and strongly coupled system states. Therefore, in order for it to achieve satisfactory dynamic performance, advanced control techniques are the only solution. This paper presents a precise speed control of permanent magnet synchronous motors using the nonlinear time-frequency control concept. The novel aspect of this nonlinear time-frequency control, which is an integration of discrete wavelet transformation and adaptive control, is its ability in analyzing the fundamental temporal and spectral qualities inherent of a permanent magnet synchronous motor and exerting control signals accordingly. Simulation results verifies that the proposed nonlinear time-frequency control scheme is feasible for alleviating the nonlinear behavior of the permanent magnet synchronous motor which hampers the tracking of speed with desired precision.

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Jiao, Guandong, and Christopher D. Rahn. "Current Waveform Optimization for Low Noise Permanent Magnet Motors." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33058.

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During torque production, the varying magnetic fields inside an electric motor excite vibration that radiates acoustic noise. In consumer applications, this noise can influence the perceived product quality. Noises from propulsion and auxiliary electric motors on naval vessels create an acoustic signature that increases detectability. The dominant noise occurs at twice the electrical frequency (2E). For permanent magnet (PM) machines, the attraction between the rotor permanent magnets and the stator iron causes a radial force that varies sinusoidally around the stator. The stator coil currents generate a rotating magnetic field that produces rotor torque. This paper develops a new commutation strategy for PM machines that uses higher stator currents to minimize 2E noise by reducing radial force ripple without sacrificing torque. An analytical model is developed that predicts rotor torque and radial force ripple as functions of the stator currents. Based on this model, the phase currents are optimally commutated to maintain constant torque production and reduce force ripple. The optimal commutation is numerically investigated on a small PM motor using ANSYS FEA. The ANSYS results show a 30% reduction in force ripple at no load.

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Eirich, Max, Yuji Ishino, Masaya Takasaki, and Takeshi Mizuno. "Active Stabilization of Repulsive Magnetic Bearing by Using Independent Motion Control of Permanent Magnets." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35134.

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This paper investigates the control system design of magnetic forces using independent motion control of permanent magnets. In the permanent magnet bearing system, the radial motions of the rotor are passively supported by repulsive forces between ring-shape permanent magnets. The experimental results demonstrate that non contact levitation is achieved by independently PD controlled axial motion of permanent magnets driven by voice coil motors (VCM).

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Casadei, Domenico, Fiorenzo Filippetti, Claudio Rossi, and Andrea Stefani. "Magnets faults characterization for Permanent Magnet Synchronous Motors." In 2009 IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives - SDEMPED. IEEE, 2009. http://dx.doi.org/10.1109/demped.2009.5292770.

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Carraro, E., M. Degano, and N. Bianchi. "Permanent magnet volume minimization in permanent magnet assisted synchronous reluctance motors." In 2013 Eighth International Conference and Exhibition on Ecological Vehicles and Renewable Energies (EVER 2013). IEEE, 2013. http://dx.doi.org/10.1109/ever.2013.6521539.

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Krol, Emil, and Robert Rossa. "Modern magnetic materials in permanent magnet synchronous motors." In 2010 XIX International Conference on Electrical Machines (ICEM). IEEE, 2010. http://dx.doi.org/10.1109/icelmach.2010.5607962.

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Slemon, G. R., and Xian Liu. "Core losses in permanent magnet motors." In International Conference on Magnetics. IEEE, 1990. http://dx.doi.org/10.1109/intmag.1990.734358.

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Fei, W. Z., and J. X. Shen. "Novel Permanent Magnet Switching Flux Motors." In 41st International Universities Power Engineering Conferenc. IEEE, 2006. http://dx.doi.org/10.1109/upec.2006.367575.

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Reports on the topic "Permanent magnet motors"

1

Batzel, Todd D. Sensorless Electric Drive for Permanent Magnet Synchronous Motors. Fort Belvoir, VA: Defense Technical Information Center, October 1999. http://dx.doi.org/10.21236/ada370401.

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Fricke, Brian A., and Bryan R. Becker. Permanent Magnet Synchronous Motors for Commercial Refrigeration (Final Report). Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1561671.

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Ludois, Daniel C., and Ian Brown. Brushless and Permanent Magnet Free Wound Field Synchronous Motors for EV Traction. Office of Scientific and Technical Information (OSTI), March 2017. http://dx.doi.org/10.2172/1349258.

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Patil, N., J. S. Lawler, and J. McKeever. Contol of Surface Mounted Permanent Magnet Motors with Special Application to Motors with Fractional-Slot Concentrated Windings. Office of Scientific and Technical Information (OSTI), July 2007. http://dx.doi.org/10.2172/921784.

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McKeever, John W., Niranjan Patil, and Jack Lawler. Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Motors with Concentrated Windings. Office of Scientific and Technical Information (OSTI), July 2007. http://dx.doi.org/10.2172/931748.

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Lawler, J. S. Control of Surface Mounted Permanent Magnet Motors with Special Application to Fractional-Slot Concentrated Windings. Office of Scientific and Technical Information (OSTI), December 2005. http://dx.doi.org/10.2172/886007.

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Upadhyay, Piyush. Manufacturing Hybrid Copper-Aluminum Rotors for High Power Induction and Permanent Magnet Electric Motors - CRADA 475. Office of Scientific and Technical Information (OSTI), December 2020. http://dx.doi.org/10.2172/1867254.

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Lawler, J. S., J. W. McKeever, M. E. Downing, R. D. Stahlhut, R. Bremmer, J. M. Shoemaker, A. K. Seksarian, B. Poore, and J. Lutz. CRADA Final Report: Application of Dual-Mode Invertor Control to Commercially Available Radial-Gap Permanent Magnet Motors - Vol. 1. Office of Scientific and Technical Information (OSTI), May 2006. http://dx.doi.org/10.2172/890028.

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McKeever, J. W. Phase II CRADA ORNL99-0568 Report : Developing Transmission-Less Inverter Drive Systems for Axial-Gap Permanent magnet Accessory and Traction Motors and Generators. Office of Scientific and Technical Information (OSTI), August 2001. http://dx.doi.org/10.2172/814145.

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Zana, I., F. Herrault, D. P. Arnold, and M. G. Allen. Magnetic Patterning of Permanent-Magnet Rotors for Microscale Motor/Generators. Fort Belvoir, VA: Defense Technical Information Center, January 2005. http://dx.doi.org/10.21236/ada463729.

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