A Novel Strategy for Sensorless Control of IPMSM with Error Compensation Based on Rotating High Frequency Carrier Signal Injection

Lei Guo,Fei Lin,Zhongping Yang

doi:10.3390/en13081919

Abstract

In the applications of rail transit and electric vehicles, sensorless control of interior permanent magnet synchronous motor (IPMSM) usually uses high frequency (HF) signal injection in low speed or zero speed. Rotating HF signal injection based on the stationary reference frame can identify the rotor position, but its accuracy is easily affected by various nonlinearities of the control system and stator resistance. In this paper, the causes of rotor position estimation deviation are analyzed and deduced in detail. It is proposed that the rotor position estimation deviation can be divided into high frequency phase deviation (HFPD) and stator resistance phase deviation. On the basis of these analyses, a novel sensorless rotor position estimation strategy for IPMSM is proposed. This strategy can theoretically eliminate the HF phase deviation caused by the nonlinearity of the control system and reduce the phase deviation caused by the stator resistance. Although the factors that cause the estimation deviation of rotor position may change with the time and the operation status of the motor, the proposed strategy has the characteristics of online calculation and real-time compensation, which can improve the accuracy of the estimated rotor position. In addition, this paper provides a detailed theoretical derivation of resolving rotor position considering stator resistance and HF phase deviation. Finally, the result analysis on an IPMSM demonstrate the correctness of the theoretical analysis and the effectiveness of the strategy.

Highlights

Permanent magnet synchronous motors (PMSM) are widely used in transportation, industrial automation, artificial intelligence and aerospace due to their high torque density, power density and efficiency
In order to verify the high frequency carrier motor signal simulation injection control strategy proposed this paper, an interior permanent magnet synchronous platform driven proposed in this paper, an interior permanent magnet synchronous motor simulation platform by voltage source inverters is built according to the laboratory IPMSM simulation experiment platform
A rotating high frequency (HF) carrier signal injection method based on tracking rotor saliency is widely used

Summary

Introduction

Permanent magnet synchronous motors (PMSM) are widely used in transportation, industrial automation, artificial intelligence and aerospace due to their high torque density, power density and efficiency. In order to achieve high-performance motor control using the field-oriented method, it is necessary to accurately obtain the rotor position and phase current of the motor. If the rotor position detection is inaccurate, delayed or advanced, it will inevitably reduce the stability, smoothness, accuracy and dynamics of the motor control, and even prevent the motor from starting normally. Accurate detection of rotor position becomes a key technology for permanent magnet synchronous motor control. The rotor position is usually obtained with a high precision mechanical sensor. These sensors introduce disadvantages, such as additional machine dimensions, higher cost, low reliability and anti-interference. Much research has been conducted on the sensorless control of a permanent magnet synchronous motor [1,2,3,4,5,6,7,8,9,10,11,12,13,14]

Methods

Results

Conclusion