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Research of Electromagnetic Vibration and Electromagnetic Noise in High-Torque Low-Speed Permanent Magnent Synchronous Wheel Motor

Author: ZhaoDongSheng
Tutor: ChaiFeng
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: Permanent magnet synchronous wheel motor Electromagnetic vibration Modal Analysis
CLC: TM341
Type: Master's thesis
Year: 2011
Downloads: 271
Quote: 1
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Abstract


The permanent magnet synchronous motor with high efficiency, low torque ripple, high torque density, making it the main choice of electric automotive wheel drive system. Motor vibration and noise level is a measure of motor performance and even wheels drive system is an important indicator of the performance. Accounted for the major part in the vibration and noise of the motor, the vibration and noise caused by the electromagnetic. In permanent magnet synchronous wheel motor has important practical significance to study the electromagnetic vibration and noise. This paper focuses on four aspects: First, the electromagnetic design of low speed high torque permanent magnet synchronous wheel motor. Combination of motor performance parameters and technical requirements, in terms of the structure of the rotor pole slot with pole arc coefficient analysis of the motor electromagnetic design simulation, analysis comparison of three no-load torque and operating performance, in order to determine the optimal programs. Second, the an inherent modal analysis of permanent magnet synchronous wheel motor stator structure. The analytical method to calculate the natural frequency of the stator structure, established with ANSYS software motor stator and components model, modal simulation, cover, chassis for motor stator intrinsic mode. Once again, the permanent magnet synchronous wheel motor electromagnetic vibration and noise analysis. Derived based on the the motor electromagnetic force wave theory, wave power of 50kW hub motor stator tooth inner surface by the electromagnetic force wave number and frequency of use Ansoft software the three rotor structure of the motor in the no-load case the radial flux density in the air gap and the distribution of the radial electromagnetic force to study the differences in the distribution of the radial electromagnetic force of the motor and tangential electromagnetic force. Using the analytical method and the finite element method to calculate the three motor electromagnetic vibration displacement, and then get the calculated value of the electromagnetic noise. Finally, the development of permanent magnet synchronous wheel motor experimental analysis of the intrinsic mode electromagnetic vibration and electromagnetic noise. The hammering method modal experiments to verify the natural frequencies and mode shapes of the prototype, provides a basis for the design and manufacture of motor to avoid resonance. Acceleration sensors and CRAS signal acquisition and analysis system, the experimental study of the vibration characteristics of the motor at different speeds. Sudden power failure to determine the degree of motor noise, electromagnetic noise ratio. Motor speed controller switching frequency and other factors on the effects of electromagnetic noise test analysis.

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Synchronous motor
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