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- W4297201632 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." @default.
- W4297201632 created "2022-09-27" @default.
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- W4297201632 date "2022-09-25" @default.
- W4297201632 modified "2023-09-27" @default.
- W4297201632 title "Special‐angle‐based signal injection sensorless control of IPMSM for suppressing multiple zero‐crossings of phase current" @default.
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- W4297201632 doi "https://doi.org/10.1049/pel2.12383" @default.
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