Abstract
This paper presents a strategy for a permanent magnet synchronous motor sensorless vector control based on rotor flux estimation considering a rotor saliency. The integration problem in the stator flux estimation was solved by replacing the integrator with a low-pass filter. The low-pass filter parametric adaptation algorithm with phase delay compensation, based on Bode diagrams was designed for the rotor angular position estimation accuracy improving. The proposed adaption algorithm allowed to expand a stable motor control with a high accuracy in the rotor position estimation down to 15 rpm. Also the developed rotor angular position estimation algorithm together with adaptive field weakening algorithm provides a sable motor operation with a high accuracy in the rotor position estimation at the high speed.
Highlights
The electric drives based on permanent magnet synchronous motor (PMSM) are in high demand in such industry areas as robotics, tracking and guidance systems, mining, servo systems, medical equipment, electric traction drives, etc
Experimental results The rotor angular position observer algorithm was developed for the fan electric drives based on PMSM sensorless control
PMSM parameters are presented in table 1
Summary
The electric drives based on permanent magnet synchronous motor (PMSM) are in high demand in such industry areas as robotics, tracking and guidance systems, mining, servo systems, medical equipment, electric traction drives, etc. This is explained by that the PMSM has such advantages over another motors type as low values of the electromagnetic and electromechanic time constants, high torque overload capacity, small weight-size parameters compared with other motors type at the same power, wide speed control range, high efficiency (more than 90%). The sliding mode control generates a high-frequency component in the estimated rotor angular position, that is required the output signal additional filtering. The PMSM rotor angular position estimation method that provides stable performances with a high accuracy of rotor position estimation in range from 2 Hz to 400 Hz is considered
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