Abstract: Motor is a key part of the compressor which can transfer electric energy to compression energy of gas. The high pressure of refrigerant compressed by compressor pushes the refrigerant to circulate in the system. The energy efficiency of compressor is determined by the motor efficiency. Different characteristics of the designed SPM synchronous permanent magnet motor combined with the load characteristics are described. There are many advantages for light commercial compressor using SPM synchronous permanent magnet motor. The test results indicated that light commercial compressor with SPM synchronous permanent magnet motor has better running performance under different working conditions.

Key words: Synchronous motor, SPM, Ferrite, Light commercial compressor