交替極無(wú)軸承永磁電機(jī)的懸浮力脈動(dòng)分析
交替極無(wú)軸承永磁電機(jī)的懸浮力與轉(zhuǎn)子轉(zhuǎn)角本質(zhì)上是無(wú)關(guān)的，其控制系統(tǒng)因此得以簡(jiǎn)化，但考慮到諧波因素時(shí)，其引起的懸浮力脈動(dòng)對(duì)于系統(tǒng)的懸浮性能產(chǎn)生了不利影響。推導(dǎo)了計(jì)及諧波的懸浮力統(tǒng)一公式，并以有限元分析對(duì)其進(jìn)行了驗(yàn)證，指出了不同極對(duì)數(shù)時(shí)，產(chǎn)生的懸浮力脈動(dòng)的情況及原因，并提出了抑制懸浮力脈動(dòng)的方法，為交替極無(wú)軸承永磁電機(jī)的設(shè)計(jì)和優(yōu)化提供了理論指導(dǎo)。
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(guān)鍵詞： 磁懸??；無(wú)軸承；交替極；永磁電機(jī)
Keywords: magnetic suspension；bearingless；consequent-pole；pm motor