內藏式永磁同步馬達定力矩與定功率控制之開發

本論文研究內藏式永磁同步馬達在全速度操作域最大效能之輸出控制開發，在額定轉速內使用最大力矩控制產生最大定力矩輸出，在額定轉速外使用弱磁控制產生最大定功率輸出。針對最大力矩控制，本論文推出定45度m-t軸最大力矩控制方法，可簡化一般參數型的根號計算，讓系統能有相同最大力矩輸出的前提下也能有更少的計算時間。針對弱磁控制，本論文將比較前饋型弱磁控制以及回授型弱磁控制的暫態與穩態響應，並針對其需要的參數設定以及弱磁控制器設定加以優化，讓這兩種弱磁控制都能實現相近的最大定功率輸出。

This paper develops an internal permanent magnet synchronous motor (IPMSM) controller to maximize the drive performance under the same energy usage. Maximum torque per ampere (MTPA) control is used to maximize the torque output below rated speed. Flux-weakening (FW) control is implemented to maximize the power output beyond rated speed. From the perspective of MTPA, a fixed m-t axis current control is proposed during the constant torque region at low speed. Conventional MTPA control requires the differentiation of nonlinear torque equation to obtain corresponding d- and q-axis current, leading to complicated nonlinear mathematical calculation. Under this effect, conventional MTPA results in considerable controller memory and calculation time. From the perspective of FW, both feedforward and feedback control methods are compared to identify a suited FW controller. It is shown that the feedforward FW control results in fast dynamic responses; however, the parameter sensitivity is the primary control issue.