Field oriented space vector pulse width modulation control of permanent magnet brushless DC motor

This paper describes the field oriented control strategy for permanent magnet brushless DC motor with space vector pulse width modulation technique using current sensor and a speed sensor as feedback. Adaptive proportional-integral (PI) controller is introduced in this proposed control method. The performance of the control method is studied for starting condition and speed variation in C++ simulation. We observed that the control method has good performance and speed response.

I. Introduction

Brushless DC (BLDC) motor is one type of synchronous motor. It is also like a commutatorless and brushless DC motor as torque-current characteristic is similar to DC motor [1]. In this motor commutator action is done by an intelligent inverter, capable of wide range of speed control using pulse width modulation (PWM). It has three phase winding and AC power is given from the inverter. In a DC motor field is stationary but in a BLDC motor field is rotating and armature is stationary. In permanent magnet brushless DC (PMBLDC) motor the rotor is made from permanent magnet material. As there is no brush and commutator, this motor is almost maintenanceless [1].