Research on Rotor Position Detection Method of Printed PMSM Based on Leakage Magnetic Field of Rotor

摘要

With the merits of simple structure, strong stability and high power factor, the application of Permanent Magnet Synchronous Motor (PMSM) have become more and more widespread. Meanwhile, rotor position information of PMSM is of vital importance to motor driving. This paper is mainly to research the rotor position detection of Printed PMSM, and, by applying fluxgate technology into the detection process, the rotor position is determined based on the leakage magnetic field of the rotor. The simulation of the rotor leakage magnetic field is made using Finite Element Analysis (FEA), which verifies the feasibility of rotor position detection methods based on the Leakage Magnetic Field of Rotor. Finally, through the experimental prototype of Printed PMSM and fluxgate sensor, Printed PMSM can be driven using a rotor position detected by fluxgate sensors. Fluxgate sensors have advantages of high resolution, strong anti-interference ability, good stability, wide measurement range and ability of miniaturization design, making it suitable to detect weak leakage magnetic field at the end of the rotor so that Printed PMSM has advantages of integration and easy maintenance. Meanwhile, methods mentioned in this paper/article are also applicable to other kinds of PMSM and have certain guiding significance for the integration design of PMSM.