关键词: 压缩机电机, 磁场调制, 电机效率, 噪声

Abstract: The magnetic field modulation method generates electromagnetic torque by utilizing the magnetic-field harmonics, which also significantly affects losses, efficiency, and noise. The influence of the magnetic field modulation technology on the magnetic-field harmonics of the motor was analyzed, and the influencing mechanism of harmonics on the torque characteristics was revealed. The radial electromagnetic force of the motor under the measured current was analyzed
and compared. The influence of different magnetic-field harmonics on the main radial electromagnetic force was revealed. A noise suppression technology based on the high-order permeance modulation structure was proposed, which improved the main radial electromagnetic force generated by the magnetic field modulation technology was improved, reduced the noise of compressor was reduced, and enhanced the application value of the magnetic field modulation technology in the compressor motor. The validity of the magnetic field modulation technology was verified by the experiments.

Key words: compressor motor, magnetic field modulation, motor efficiency, noise