Friday, October 31, 2014

Three Phase BLDC Motor Bridge

To control a three phase bldc motor you must have a bridge to switch the three phases on and off. This bridge consists of switches and some other electronic components. I used in my three phase bridge 6 mosfets, 3 N-type and 3 P-type. I used some other transistors and resistors to turn these mosfets on and off.
The schematic diagram of the three phase circuit is shown below:


We will use this circuit to control a cd-rom sensored three phase bldc motor speed and direction using arduino uno board.