STUDY OF PHASE ADVANCE ANGLE CONTROL METHOD FOR BRUSHLESS DC (BLDC) MOTOR

The brushless DC (BLDC) motor is recognized by the linear speed to voltage and
torque to current. It has high fast dynamic response and high power density with high
proportion of torque in sprite of small size drive. However, it is difficult to
conventional BLDC motor to drive at high speed operating mode (limited top speed).
It is because of the torque and speed response characteristic of the motor at high
speed operating mode are deteriorated by the motor inductance components in stator
winding. Phase advance angle method is one method used to control the phase current
and improve torque and speed response at high speed operating mode of BLDC
motor. This project concentrates on the operation of BLDC motor under high-speed
motoring mode. Extended simulation results prove the validity of phase advance
angle control method, considering lossless motor operation and the same parameters
of an actual BLDC motor. In this project also, the results of laboratory testing are
demonstrated to prove the compatibility of the purposed phase advance motor drive
on actual BLDC motor. Both simulation and experimentation results confirm that
phase advance angle control method is capable to extend the speed beyond the
designed motor speed.