A way of neodymium-iron-boron magnets regeneration in surface-mounted PMSM used in electric vehicles

Łebkowski, Andrzej

doi:10.1515/bpasts-2017-0081

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…In addition, the magnets mounted on the rotor are subjected to forces caused by action of the coils in the electromagnetic circuit. Very high values of current in the stator circuit, along with extra harmonic content introduced from the inverter circuit can cause heating of magnets, and in extreme cases demagnetization, following their detachment from the rotor surface and permanent damage [60]. The method of mounting magnets on the ERPMSM rotor is to ensure optimal use of their magnetic properties, without compromising the developed parameters of the motor, and regardless of the environmental conditions in which they are used.…”

Section: Analysis and Selection Of Magnet Fixings On The Rotormentioning

confidence: 99%

Design, Analysis of the Location and Materials of Neodymium Magnets on the Torque and Power of In-Wheel External Rotor PMSM for Electric Vehicles

Łebkowski

2018

Energies

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The technology of mounting electric direct drive motors into vehicle wheels has become one of the trends in the field of electric vehicle drive systems. The article presents suggestions for answering the question: How should magnets be mounted on the External Rotor Permanent Magnet Synchronous Machine (ERPMSM) with three phase concentrated windings, to ensure optimal operation of the electric machine in all climatic and weather conditions? The ERPMSM design methodology is discussed. Step by step, a method related to the implementation of subsequent stages of design works and tools (calculation methods) used in this type of work are presented. By means of FEM 2D software, various ERPMSM designs were analyzed in terms of power, torque, rotational speed, cogging torque and torque ripple. The results of numerical calculations related to variations in geometric sizes and application of different base materials for each of ERPMSM machine components are presented. The final parameters of the motor designed for mounting inside the wheel of the vehicle are presented (Power = 53 kW, Torque = 347 Nm; Base speed = 1550 RPM), which correspond to the adopted initial assumptions.

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Section: Analysis and Selection Of Magnet Fixings On The Rotormentioning

confidence: 99%

Design, Analysis of the Location and Materials of Neodymium Magnets on the Torque and Power of In-Wheel External Rotor PMSM for Electric Vehicles

Łebkowski

2018

Energies

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“…Electric vehicles are powered by electric motor drives instead of the conventional combustion engine. Permanent Magnet Synchronous Motor (PMSM) drives have received a lot of interest in this field for their powerful torque profiles that are suitable for vehicle traction [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis and Optimized Design of Synergetic Control for a PMSM Drive System

Adib¹,

Dhaouadi²

2022

Induction Motors - Recent Advances, New Perspectives and Applications

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This chapter presents an optimum design of synergetic control for a permanent magnet synchronous motor (PMSM) drive system. New macro-variables are proposed to improve the performance of the standard controller. The controller’s performance is compared with that of the field-oriented control scheme. The chapter also investigates the regenerative braking mode of operation in PMSM. Regenerative braking is achieved by operating the motor in torque control mode. The different algorithms are validated through experiments using a 1-hp PMSM drive system. We also provide an extensive study of the controller parameters tuning for optimal performance. The experimental results show that the proposed macro-variables improve the performance of the synergetic controller significantly. The synergetic controller is able to overcome nonlinearities in the system, such as static friction, faster than the field-oriented controller. The system also experiences fewer harmonics under the synergetic controller. The synergetic controller shows also better performance under wide signal variations. As for regenerative braking, the torque control mode of operation is shown to be suitable for harvesting energy and both techniques showed similar performance levels. The proposed synergetic control strategy will be very useful in electric vehicle (EV) applications, as it allows to improve the dynamic response and efficiency of the drive system required by the EV dynamics.

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“…Permanent magnets based on the Re-Fe-B alloys are extensively used in various areas of technical applications, especially in electrical motors and actuators [1]. In order to reduce the sizes of such devices, new processing techniques must be applied.…”

Section: Introductionmentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Pawlik

2021

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GFA of the alloy [5][6][7]. Furthermore, doping with Zr and Nb causes the microstructure refinement of the RE-Fe-B magnets and, thus, can enhance the magnetic properties of the annealed specimens [8][9][10]. As was reported in [7], the appropriate setting of the composition for the Fe 67 Co 9.4 Nd 3.1 Dy 0.5 B 20 alloy led to an improvement of the GFA that allowed processing of the fully glassy rods with diameters up to 0.5 mm. A further change of composition and addition of Zr facilitated casting 1-mm diameter amorphous rods and up to 3-mm outer diameter tubes for the Fe 61 Co 13.5 Zr 1 Pr 3.5 Dy 1 B 20 alloy [11]. However, a small amount of RE elements in the chemical composition caused the formation of a relatively low fraction of the RE 2 Fe 14 B phase. For this reason, such magnets reveal rather moderate magnetic parameters [12]. We have shown in our previous studies on rapidly solidified plates of various thicknesses produced for Pr 9 Fe 50 + x Co 13 Zr 1 Nb 4 B 23 - x (x = 0, 2, 5, 8) alloys that boron content greatly influences the GFA. In the case of the Pr 9 Fe 50 Co 13 Zr 1 Nb 4 B 23 alloy, the 0.5-mm thick plates were fully amorphous while 1-mm plates were slightly crystalline and only one very low-intensity diffraction peak was detected [6,13]. However, for alloys of lower B content, the suction cast plates were all crystalline in as-cast state. Furthermore, the critical cooling rate attainable for specific production equipment depends on the sample geometry [14]. The changes in the microstructure and magnetic properties with the sample shape were shown for the Pr 9 Fe 52 Co 13 Zr 1 Nb 4 B 21 alloy [15].The aim of the present work was to study the influence of the Fe to B ratio on the GFA as well as on the phase constitution, microstructure, and magnetic properties of the 1-mm diameter rods of Pr 9 Fe 50 + x Co 13 Zr 1 Nb 4 B 23 - x (x = 0, 5, 8) alloys in the as-cast state and those subjected to annealing. Preliminary analysis of magnetic parameters has shown that optimal magnetic

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A way of neodymium-iron-boron magnets regeneration in surface-mounted PMSM used in electric vehicles

Cited by 5 publications

References 25 publications

Design, Analysis of the Location and Materials of Neodymium Magnets on the Torque and Power of In-Wheel External Rotor PMSM for Electric Vehicles

Design, Analysis of the Location and Materials of Neodymium Magnets on the Torque and Power of In-Wheel External Rotor PMSM for Electric Vehicles

Dynamic Analysis and Optimized Design of Synergetic Control for a PMSM Drive System

Bulletin of the Polish Academy of Sciences: Technical Sciences

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