Key points are not available for this paper at this time.
Abstract Aiming at the Interior Permanent Magnet Synchronous Motor (IPMSM) which cannot be started smoothly in the zero low speed range and transition smoothly to the medium high speed range in a single observer, this paper proposes a set of full speed range control algorithms based on the fusion of pulsating high frequency injection (HFI) and the position error information of the back electromotive force (EMF). When operating in the low speed range or start-up, a square wave excitation signal is injected, and the obtained high frequency current signal is processed to obtain the rotor position error information, which enhances the control bandwidth, reduces the noise, and reduces the phase shift due to the introduction of filters. The observer uses the dual second order generalized integrator (DSOGI) module to output the angular frequency in the low speed range to ensure smooth observer switching. When operating in the high speed range, higher order sliding mode observer (HSMO) based on the back EMF model can be used to obtain rotor position error information. During switching, the rotor position information is processed by the fusion strategy, and the obtained hybrid information is fed into the system to improve the stability of motor operation. The accuracy of the algorithm is verified in a 0.2kW IPMSM position sensorless vector control system.
Gao et al. (Mon,) studied this question.