1756-CFM AB 1756模塊
1756-CFM AB 1756模塊
電機三相電流通過Park變換與矢量旋轉(zhuǎn)被分解為產(chǎn)生磁通的勵磁電流分量id和產(chǎn)生轉(zhuǎn)矩的轉(zhuǎn)矩電流Iq分量,這兩個分量具有獨立的比例積分放大電路。芯片可以啟用或禁止速度閉環(huán)控制,啟用速度閉環(huán)控制時,通過改變給定速度值,給定速度值與測量速度之間相互比較將產(chǎn)生速度偏差?;谶@個偏差,速度調(diào)節(jié)器產(chǎn)生一個對應(yīng)的轉(zhuǎn)矩電流Is_qRef;當速度閉環(huán)控制禁止,可以直接改變轉(zhuǎn)矩電流Is_qRef。當Is_dRef=0時,改變轉(zhuǎn)矩電流 Is_qRef,通過經(jīng)過Clark變換轉(zhuǎn)換成靜止的α,β坐標系的電流分量isα、isβ,再經(jīng)過Park變換轉(zhuǎn)換成旋轉(zhuǎn)坐標系下的電流Id,Iq?;谛D(zhuǎn)坐標系的給定和實際電流的偏差,電流控制器產(chǎn)生輸出電壓Us_q和Us_d(在旋轉(zhuǎn)坐標系d,q)。電壓Us_q和Us_d被反變換成靜止坐標系下的電壓分量。然后經(jīng)過空間矢量PWM計算后,給逆變器的功率模塊發(fā)出合適的開關(guān)信號。
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