利于開關磁阻電機減振降噪的散熱筋和繞組結構設計

相當大的振動和噪聲阻礙了開關磁阻電機的推廣應用。由于定子的徑向振動是開關磁阻電機噪聲的主要根源，因此定子振動系統的模態分析是降噪研究的有效手段。本文利用三維有限元法模態分析，通過比較分析開關磁阻電機定子振動系統的固有頻率在不同繞組安裝工藝和散熱筋結構條件下的變化，得出了加固繞組和采用周向散熱筋結構有利于降低開關磁阻電機噪聲水平的結論。通過比較一臺實驗樣機的模態分析計算結果和實測結果，證實了模態分析計算的有效性。
Abstract: Considerable vibration and acoustic noise limit the application of Switched Reluctance Motors (SRMs). As the radial vibration of stator is the origin of the acoustic noise of SRMs, modal analysis of stator vibration is the effective way to the research for low acoustic noise. Three-dimension finite element modal analysis was adopted in this paper to analyze and compare the resonance frequencies of SRMs varying with different winding assembly drafts and radiating rib structures.Eventually the conclusion is drawn that both reinforce windings and circumferential direction ribs structures are favorable for lowering the acoustic noise level of SRMs. The validity of modal analysis was proved by comparing the modal analysis results with the measured results of a prototype motor.
關鍵詞﹕噪聲，繞組裝配工藝，模態分析，固有頻率，散熱筋，開關磁阻電機，振動
Keywords: Acoustic Noise，Draft of Winding Assembly，Modal Analysis，Natural Frequency，Radiating Rib， Switched Reluctance Motor，Vibration