| Title |
A Study on Starting Characteristics Improvement of Sensorless BLDC Motor |
| Keywords |
Capacitor-run ; Single phase ; Permanent magnet ; Synchronous motor |
| Abstract |
Brushless DC motor is a motor which is modified from DC brush motor and it does not have brushes. BLDCM is easy to contro, has wide speed range, high efficiency. However it needs speed sensor like encoder which increases the motor price and cause some faults in poor surroundings. In this paper, for the sensorless control, the driving techniques for the initial stable start and the steady state are studied. For the steady state, the rotor position is determined using the measured back-EMF. To enhance the initial stating performance, the current signal from the free-wheeling diode is used. The results are conformed through the experiments. |