关键词: 永磁电机, 直流分量, 不平衡电流, 电磁力, 磁密

Abstract: The 12-slot & 8-pole interior permanent magnet machine was used as the study object. Under both the DC component mode and the unbalanced current mode, the tangential electromagnetic force and the air-gap flux density were researched. The contribution orders of the two kinds of abnormal currents mentioned above to the tangential electromagnetic force was analyzed by simulation. The internal relationship between the larger tangential forces and the radial & tangential flux density was analyzed, and the main-contribution flux density order was proved. This study could provide theoretical support for the analysis of engineering cases related to abnormal currents.

Key words: permanent magnet motor, DC component, unbalanced current, electromagnetic force, flux density