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Research on Fault-Tolerant Permanent Magnet Synchronous Machine for Electric Vehicles

Author: SuiYi
Tutor: ZhengPing
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: Multiphase motor Electric vehicles Fault-tolerant Torque ripple Eddy current loss
CLC: U469.72
Type: Master's thesis
Year: 2011
Downloads: 181
Quote: 0
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Abstract


With the continuous improvement of the reliability and fault tolerance requirements of electric vehicles , the traditional three-phase motor is difficult to meet these requirements , multi-phase motor still able to meet the demanding requirements of electric vehicles on the reliability of high power density , low torque ripple advantages. Multiphase fault tolerant motor of this study can be used as the next generation of electric vehicles , high-performance power implementation of the program , but also can be extended to the field of ship propulsion and aerospace . First analysis of fault-tolerant motor characteristics , to clear basic motor design principles ; considering a variety of factors to determine the number of phases of the motor , to study the basic principles of the multi-phase motors , research the multiphase motor electromagnetic design method based on the magnetic circuit law by establishing a limited element model to verify the correctness of the design method . Secondly, the inductance parameters calculation method based on the finite element calculations , consider cross magnetizing inductance parameter , given the calculation process , the crossover the magnetization phenomenon of the motor inductance parameter study saturated . Next , against the the multiphase motor torque density and torque fluctuations special requirements , choose the winding arrangement , the pole arc coefficient , magnetization direction and notch width of motor performance , thereby determining the motor optimal design and analysis of the electromagnetic properties of the motor at full speed within . Further analysis of the motor in an open, two-phase open - circuit and the one-phase short-circuit under the torque output capability using phasors under the root causes of the torque ripple in the fault . Final study airgap mmf harmonic distribution , study subharmonic caused by eddy current loss in the permanent magnet , and and effective way proposed to reduce the eddy current loss of the permanent magnet .

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CLC: > Transportation > Road transport > Automotive Engineering > A variety of automotive > Various energy vehicles > Electric vehicles
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