XV Xun1, RUAN Jianguo2, LU Wenqi1,3, YU Zhiyuan3

 

(1. Wolong Electric Group Co. Ltd., Hangzhou 310052, China;

 

2. Zhejiang Institute of mechanical & electrical engineering Co. Ltd., Hangzhou 310009, China;

 

3. Faculty of Mechanical Enqineering & Automation, Zhejiang SciTech University, Hangzhou 310016, China)

 

 

Abstract: Aiming that the feature of  higher price is not suitable for the cost sensitivity industry application when the traditional high performance surface permanent magnet synchronous motor always requires a physical current sensor with its corresponding conditioning circuit gathering and feeding back the phase current to form a closed loop system and in order to make the system more cohesive and economic, current sensorless control′s scheme of permanent magnet synchronous motor (PMSM) based on phase current estimation was designed. The system′s simulation model was established and the system′s performance was analyzed. The analysis results indicate that the control system′s speed governing performance of phase current reconstruction is relatively outstanding and the phase current reconstruction algorithm has high accuracy. However, at low speed, the current estimation performance is relatively poor, this method is only suitable for highspeed occasion.

 

Key words: permanent magnet synchronous motor (PMSM); current senorless; phase current reconstruction; simulation