Special‐angle‐based signal injection sensorless control of IPMSM for suppressing multiple zero‐crossings of phase current
Year: 2022
Type: article
Abstract: Pulsating high‐frequency signal injection has the problem of multiple zero‐crossings when the phase current crosses zero‐point, which deteriorates the distortion of high‐frequency current caused by the zero‐current‐clamping effect. Thus, the accuracy of position observation is affected. To suppress multiple zero‐crossings, improved sinusoidal and square‐wave signal injection schemes are proposed. First, the relationship between the injection angle of the high‐frequency signal and the phase of the high‐frequency response current amplitude function is analysed. Based on the relationship, a special injection angle is calculated. By injecting the pulsating signal in the obtained special angle, the phase of the high‐frequency current is shifted. The amplitude of the high‐frequency response current is minimum when the fundamental frequency current crosses zero, thus reducing zero‐crossing points of phase current. Furthermore, the error signal extraction scheme applicable to arbitrary angle injection is designed to observe rotor position. The proposed high‐frequency signal injection method minimises the zero‐crossings of the phase current at any value of the torque angle. Both of the novel sinusoidal pulsating injection sensorless control scheme and square‐wave injection sensorless control scheme are confirmed by experiments on a 2.2‐kW interior permanent magnet synchronous motor (IPMSM) drive platform.
Source: IET Power Electronics
DOI: 10.1049/pel2.12383
Authors: Lisi Tian, Zaixiang Wang, Hao Zhang, Zheng Wang, Xin Guo
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,800
Awards: G3275150197, G3974185411, G7164593421
OpenAlex ID: W4297201632