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Rotor position estimated with high-frequency (HF) voltage injection methods can be distorted by voltage errors due to inverter nonlinearities, motor resistance, and rotational voltage drops, etc. This paper proposes an improved HF square-wave voltage injection algorithm, which is robust to voltage errors without any compensations meanwhile has less fluctuation in the position estimation error. The...
This paper presents the development of a position sensorless controlled synchronous reluctance motor (SynRM) drive. First, the basic vector controlled SynRM drive is established, including power circuit, sensing and commutation schemes. Then the high-frequency injection (HFI) based rotor position estimator is developed to yield the rotor position for making the vector control. After comprehending...
This paper proposes a new method of modelling of inductance spatial harmonic components for a position sen-sorless control. The conventional methods for the sensorless control based on mathematical model consider only fundamental components of the inductances. This cause several problems including limited controller's bandwidth. The proposed method is based on the fact that the estimated back electromotive...
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