基于正负序分离的旋转变压器软件解码算法研究

A Software-decoding Algorithm of Resolver Based on the Separation of Positive and Negative Sequence

为了消除旋转变压器(简称“旋变”)因正余弦反馈信号幅值不平衡以及相位不正交所引起的解码角度误差,文章对旋变正余弦反馈信号进行了dq变换以及正负序分离,并提出了一种基于正负序分离的旋变软件解码算法。该解码算法提取旋变异常信号中的负序分量,并利用负序分量对解码角度进行补偿,能够有效地消除由于负序分量导致的2倍频角度误差以及直流分量误差。最后对该算法进行仿真分析和实验验证,实验数据验证了所提算法的有效性。

In order to eliminate the angle error caused by amplitude imbalance and phase non-orthogonality of resolver sine and cosine feedback signals,dq transform and positive and negative sequence separation are carried out to resolve sine and cosine feedback signals,and a software decoding algorithm based on positive and negative sequence separation is proposed.The decoding algorithm extracts the negative sequence component from abnormal signals,and uses the negative sequence component to compensate the decoding angle.The decoding algorithm can effectively eliminate the angle error of double frequency and DC component error caused by negative sequence component.Finally,the algorithm is simulated and verified by experiments.Experimental data verify the effectiveness of the proposed algorithm.