Abstract
Conventional techniques for sensorless control of permanent magnet synchronous motor drive (PMSM), which requires information on rotor position, are reviewed, and recent developments in this area are introduced in this paper along with their inherent advantages and drawbacks. The paper presents an improved method for sensorless speed control of PMSM drive with emphasis placed on signal injection method. This signal injection method examines the control performance of sensorless PMSM drive by injecting signal externally and thereby sensing the rotor position. The main objective of this drive system is to have speed control at standstill and low speed regions. Several tests are carried out to demonstrate the ability of proposed models at different operating conditions with the help of simulation results in Matlab/Simulink environment. Simulation results confirm that the proposed sensorless control approach of PMSM can achieve high performance at standstill and low speeds but not at very high speeds. An experimental setup is implemented using a 1HP surface mounted (SM) PMSM and DsPICDEM^TM MCHV-2 development board, to check the validity of simulation results.
Highlights
Permanent Magnet Synchronous Motor (PMSM) drives have been used widely due to its numerous advantages such as higher efficiency, higher power factor, rugged construction, reliable operation, high degree of control flexibility, high torque to inertia ratio, high torque to current ratio, etc
This paper presents a performance of rotor position sensorless control of PMSM drive in which the rotor position is sensed by injecting external high frequency (HF) voltage signal in rotating q-and d-axes [4], [5]
The mathematical modeling for analysis of sensorless vector controlled PMSM drive and its implementation employing HF signal injection using MATLAB/Simulink has been presented in this paper
Summary
Permanent Magnet Synchronous Motor (PMSM) drives have been used widely due to its numerous advantages such as higher efficiency, higher power factor, rugged construction, reliable operation, high degree of control flexibility, high torque to inertia ratio, high torque to current ratio, etc. This paper presents a performance of rotor position sensorless control of PMSM drive in which the rotor position is sensed by injecting external high frequency (HF) voltage signal in rotating q-and d-axes [4], [5]. With this scheme the difficulties in sensing the rotor position at standstill are eased. The main aim of this drive system is to have a closed loop speed control at low speed range without using a speed transducer and the simulation results demonstrate that the proposed strategy is effective
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