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Some thoughts on extracting perspectives from ealfa and Ebeta
2022-07-05 07:59:00 【feiyingzaishi】
1、 The angle extracted from the back EMF can be directly atan2 To calculate the , It can also be done through PLL obtain
2、 I use simulation PLL Extract frequency and angle , There are two debugging experiences recorded
1)PLL The input error is :Ealfa*cosθ - Ebeta*sinθ; instead of -Ealfa*cosθ - Ebeta*sinθ;
2)PLL Of Kp and KI Gain adjustment ,KI Basically unchanged , With Ealfa The increase in frequency , If smaller Kp Words , The estimated phase lag is large , It's time to add Kp Gain can reduce the phase error .
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