Electronic Science and Technology ›› 2021, Vol. 34 ›› Issue (4): 59-69.doi: 10.16180/j.cnki.issn1007-7820.2021.04.010

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Overview of Sensorless Control Technology for Full Speed Range Permanent Magnet Synchronous Motors

ZHOU Tao,JIANG Quan   

  1. School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
  • Received:2020-01-02 Online:2021-04-15 Published:2021-04-16
  • Supported by:
    National Key R&D Program of China(2018YFB0104603)


Currently, the control system of permanent magnet synchronous motor is developing towards high efficiency and low cost. In view of the problems of the conventional mechanical position or speed sensors, such as large size, high cost, inconvenient installation and low reliability in special applications, sensorless control technology is widely used in the field of electric drives. The key to realize sensorless control is to detect the rotor position or speed of the motor. This study classifies and summarizes the various methods of sensorless control technology of permanent magnet synchronous motors in the range of zero low speed, medium high speed and full speed. The principle and characteristics of various methods are introduced, and their advantages and disadvantages are analyzed and compared. Finally, the research focus and development trends of sensorless control methods for permanent magnet synchronous motors are prospected.

Key words: permanent magnet synchronous motors, position sensorless control, rotor position estimation, zero low speed, medium high speed, full speed range, signal injection, sliding mode observer

CLC Number: 

  • TP273