The type of BLDC motor available are
Right Answer is:
Both Unipolar and Bipolar
SOLUTION
There are two types of brushless DC motors available, which are
- Unipolar BLDC motor
- Bipolar BLDC motor
Unipolar BLDC Motor:- In this type of BLDC motor, optical sensors are used by the rotor. The optical sensor has a light source, three phototransistors. These transistors are placed at an angle of 120° from each other and they are fitted on the motor end-plate. A revolving shutter coupled to the motor shaft is also used.
Bipolar BLDC Motor:- In Bipolar BLDC motor three-phase inverter feedback diodes are used. Moreover, the Hall effect sensors are used to sense the position of the rotor. However, the combination of three Hall effect sensors and a ring of the magnet makes a rotor position sensor. The Hall sensors are placed 120 electrical degrees apart from each other. A magnet ring is directly fitted on the rotor shaft and revolves with the rotor.
