Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Novel Rotor Position Error Calculation Method using a Rotation Matrix for a Switching Frequency Signal Injected Sensorless Control in IPMSM
Authors Sang-Il Kim ; Rae-Young Kim
DOI 10.6113/TKPE/2015.20.5.402
Page pp.402-409
ISSN 1229-2214
Keywords Sensor-less control; IPMSM(Interior Permanent Magnet Synchronous Machine); Signal injection; Rotation matrix
Abstract This paper proposes a novel rotor position error calculation method for high-frequency signal-injected sensorless control. The rotor position error using the conventional modulation method can be only measured up to ±45°. In addition, when the rotor position estimation error is not sufficiently small, the small angle approximation in no longer valid. To overcome these problems, this study introduces a new rotor position error calculation method using the rotating matrix. In this study, the position error measurement range of the proposed method is extended from ±45° to ±90°. The linearity between the real rotor position error and the estimated error is maintained by nearly 90°. These features of the proposed method improve the performance of the sensorless control. The validity of the proposed method is verified by simulations and experiments.