Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Online Parameter Estimation of SPMSM using Affine Projection Algorithm
Authors Byung-Hun Moon ; Hyoung-Woo Kim ; Joon-Young Choi
Page pp.66-71
ISSN 1229-2214
Keywords APA(Affine Projection Algorithm) ; Online parameter estimation ; PI control ; SPMSM(Surface-mounted Permanent-Magnet Synchronous Motor)
Abstract We propose an online parameter estimation method for surface-mounted permanent-magnet synchronous motor (SPMSM) using an affine projection algorithm (APA). The proposed method estimates parameters with two APAs based on the discrete-time model equation of SPMSM during motor operation. The first APA is designed to estimate inductance, and the second APA is designed to estimate resistance and flux linkage. However, in case when the d-axis current is controlled to 0A, the second APA cannot estimate resistance and flux linkage simultaneously because the matrix rank in APA becomes deficient. To overcome this problem, we temporarily inject a negative reference current input to the d-axis control loop, and the matrix in the APA then becomes full rank, which enables the simultaneous estimation of resistance and flux linkage. The proposed method is verified by PSIM simulation and an actual experiment, and the results reveal that SPMSM parameters can be estimated online during motor operation.