本文探討切換式磁阻馬達(Switched Reluctance Motor)之開關角度對於轉矩漣波的影響，進而發展出一套開關角度控制。通常使用直接轉矩控制做為驅動策略時，當磁阻馬達操作於高速運轉時會因為轉矩補償及電流續流問題而產生較大的轉矩漣波。藉由開關的導通與截止角度控制，進而抑制高轉速時馬達之轉矩漣波。本方法使用MATLAB軟體進行模擬，分析馬達運轉不同轉速時轉矩漣波抑制情況。接著以一具額定2.2kW之切換式磁阻馬達以及非對稱半橋驅動器驗證本文提出的開關角度控制，在各轉速下皆有效抑制轉矩漣波在20%以內。

This thesis illustrates the impact of current conduction angle on torque ripple for the operation of switched reluctance motor. A control methodology is then proposed to alle-viate this impact. In general, torque ripple is more obvious as the switched reluctance motor is running at high speed using the Direct Torque Control because of unbalanced torque compensation and current tail effect. The proposed method is to adaptively control the turn-on and turn-off angles of the power switch in order to improve the torque bal-ancing compensation as well as reduce the current tail effect. MATLAB simulation is ap-plied to analyze the proposed effect on torque ripple reduction at different rotor speeds. Following that, a 2.2kW switched reluctance motor driven by an asymmetric half bridge converter is tested to validate the effectiveness of the proposed control methodology. Test result shows that the torque ripple can be suppressed below the range of twenty per-cent at different rotor speeds.

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