Periodic Harmonic Spread Spectrum Modulation for High-Frequency Sideband Vibro-Acoustic Suppression in Permanent Magnet Synchronous Motor
Qiu Zizhen1,2, Chen Yong1, Cheng Haiquan1, Liu Xu3, Gu Fengshou2
1. Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles Hebei University of Technology Tianjin 300130 China; 2. Centre for Efficiency and Performance Engineering (CEPE) University of Huddersfield Huddersfield HD1 3DH UK; 3. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China
Abstract：In this paper, a 12-slot/10-pole permanent magnet synchronous motor and control system for the electric vehicle rear axle drive has been taken as the research object. Based on the periodic harmonic spread spectrum modulation technique, the sideband harmonic components and high-frequency vibro-acoustic response introduced by the conventional space vector pulse width modulation (SVPWM) technology are suppressed. The main frequency distribution and other characteristics are analyzed in sideband current harmonics and radial electromagnetic force. A comprehensive power spectrum analysis model of harmonic spread spectrum modulation has been established, where two typical periodic signals of sawtooth wave and sinusoidal wave are analyzed. The influence of bandwidth and modulation ratio on the suppression effect is also discussed. The related sideband current harmonics and vibro-acoustic responses are verified by the measurement and control experimental platform under different operational conditions. The results show that the periodic harmonic spread spectrum modulation can effectively suppress sideband harmonic components, and the central frequency band of noise responses is optimized by more than 20dBA. The sawtooth signal-based scheme exhibits better suppression effect than the sinusoidal signal-based scheme. Moreover, the sideband harmonics in the sinusoidal signal-based scheme are more sensitive to the bandwidth changes.
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2022, Vol. 37 
