Wholesale 250W Brushless DC Motor Driver Circuit for Ventilation System

The speed control of high speed must take into account whether the CLOCK resolution of the system is enough to grasp the time of processing software instructions. In addition, the data access mode of hall-sensor signal change also affects the processor efficiency and the correctness and real-time of judgment. As for the speed control of low speed, especially low speed starting, because the returned hall-sensor signal changes more slowly, how to capture the signal mode, processing time and properly configure the control parameter value according to the motor characteristics is very important.

When the motor rotor turns to the position where the hall-sensor senses another set of signals, the control unit turns on the next set of power transistors again, so that the circulating motor can continue to turn in the same direction until the control unit decides to stop the motor rotor and turn off the power transistors (or only turn on the lower arm power transistors); If the motor rotor is reversed, the power transistor turns on in reverse order.