Open AccessA New Method for Detecting Initial Position of IPMSM Rotor
Author(s) -
Qingquan Zhang,
Yi Zheng,
Xumin Huang,
Haiyan Gao,
Guizhi Yang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/768/4/042023
Subject(s) - rotor (electric) , control theory (sociology) , stator , heterodyne (poetry) , signal (programming language) , demodulation , position (finance) , computer science , dspace , engineering , acoustics , physics , algorithm , electrical engineering , artificial intelligence , telecommunications , channel (broadcasting) , control (management) , finance , economics , programming language
Aiming at the speed sensorless control system of permanent magnet synchronous motor which embedded in rotor magnet steel, a new method for detecting the initial position of the rotor is proposed in this paper. This method is injecting a high-frequency rotating voltage to generate a high-frequency current in the stator windings that contains the spatial position information of the rotor. Compared with the traditional high-frequency injection method, this paper uses Discrete Fourier Transform (DFT) to demodulate high-frequency current. It avoids the signal phase delay caused by the use of a large number of filters when demodulating the traditional heterodyne method. At the same time, this method has nothing to do with the initial phase of the injected signal. Compared with the heterodyne method, the extracted rotor position angle is more accurate, and the structure is simple Number system. The validity and feasibility of the method are verified by simulation and experimental platform based on dSPACE.