Research of Sensorless Drive of Permanent Magnet Synchronous Motor Based on Power Factor Control

Abstract

For the traditional sensorless vector control systems of permanent magnet synchronous motor, a new sensorless vector control method is proposed based on the power factor control. On the basis of analysis of the mathematical models for the permanent magnet synchronous motor, established a power factor voltage reference frame system. The rotor position and speed is estimated by the control of power factor angle, and then from the point of view of efficiency drive to configure the stator current. This stator current is arranged in the vicinity of the current minimum trajectory. This method not only can control the speed, but also ensure high power factor and high drive efficiency of the permanent magnet synchronous motor. The simulation results proved the effectiveness and feasibility of this control method.

PMSM sensorless control based on sliding mode control with fuzzy variable gain STA-SMO

“…Rotor speed and position information can be obtained by mechanical sensors, but mechanical sensors not only increase the complexity of the system structure, but also increase the cost. In particular, mechanical sensors are susceptible to damage in humid, vibrating and dusty industrial environments, therefore, a sensorless control technology for PM synchronous motors that can reduce cost and improve reliability has received wide attention [1][2][3] . The main sensorless control techniques currently used for permanent magnet synchronous motors are the extended Kalman filter method, the model reference adaptive method, and the sliding mode observer method.…”