交替極無軸承永磁電機的懸浮力脈動分析
交替極無軸承永磁電機的懸浮力與轉子轉角本質上是無關的，其控制系統因此得以簡化，但考慮到諧波因素時，其引起的懸浮力脈動對于系統的懸浮性能產生了不利影響。推導了計及諧波的懸浮力統一公式，并以有限元分析對其進行了驗證，指出了不同極對數時，產生的懸浮力脈動的情況及原因，并提出了抑制懸浮力脈動的方法，為交替極無軸承永磁電機的設計和優化提供了理論指導。
Abstract: The control system of a consequent-pole bearingless PM motor is less complicated than those of other types of bearingless machines, since the radial suspension force is independent of the rotating angle. However, when the harmonics of magnetic field in the air-gap are taken into account, the radial suspension force ripple can be observed, which affects the suspension performance. In this paper, the harmonics of the magnetic field in the air-gap is taken into account for the deduction of the model of a CPB PM motor. And the model is proved by the FEA simulation. The radial suspension force ripples with different pole pair configurations are discussed. The causes and the methods to eliminate the suspension force ripple are analyzed.
關鍵詞： 磁懸浮；無軸承；交替極；永磁電機
Keywords: magnetic suspension；bearingless；consequent-pole；pm motor