Sensorless Control for Permanent Magnet Synchronous Motor in Rail Transit Application Using Segmented Synchronous Modulation

Abstract

This paper proposes a position sensorless control technique for permanent magnet synchronous motor (PMSM) used in rail transit application, where a segmented synchronous modulation (SSM) is usually applied. The arbitrary signal injection-based sensorless control is adopted to estimate rotor position. In a switching period, an oversampling technique is used to obtain the average current slope that contains the rotor position information during the active voltage-vector operation. In SSM, the hysteresis zone is set near the carrier ratio (CR) switching critical point to eliminate the influence of the repeated oscillation on the current measurement accuracy. Furthermore, a load disturbance compensation method is designed so that the failure of hysteresis zone is avoided. Through the analysis of power spectral density (PSD) of phase current, the optimization of harmonic energy distribution with hysteresis zone is also verified. The experimental results show that the proposed method can improve the position estimation precision during the fast CR transition, which can be effectively applied in SSM. INDEX TERMS Permanent magnet synchronous motor (PMSM), segmented synchronous modulation (SSM), arbitrary signal injection, oversampling, sensorless control.

Vector Control of Permanent Magnet Synchronous Motor Based on MRAS Method

“…The rotor magnetic circuit of the built-in permanent magnet synchronous motor is asymmetric, and the motor changes electrically under the influence of rotor position angle [17,18]. Combined with the double reaction theory of traditional electrically excited synchronous motor, the current, voltage and flux linkage vectors of the motor are converted into rotating coordinate system.…”

Archives of Electrical Engineering

“…The analysis showed a high value of the THD coefficient for the supply current. In the case of supplying PMSMs by inverter-equipped systems one usually observes a high content of odd harmonics, that is 5, 7, 11 and 13 [22][23][24][25].…”

UKF-Based Parameter Estimation and Identification for Permanent Magnet Synchronous Motor

“…Permanent magnet synchronous motor (PMSM) has been widely used in the fields of new energy vehicles, power generation, and servo drive due to its advantages of large starting torque, high operation efficiency, high power density, and low failure rate (Chen et al, 2014;Chen et al, 2019;Cui et al, 2020;Wang et al, 2021). In the traditional vector control system, sensors are usually used to obtain rotor speed and position information; but in practical application, the existence of sensors increases the motor volume and system cost, and it is difficult to install and maintain in some harsh environments, which reduces the reliability of the system (Pan and Gao, 2018).…”