dc controller motor supplierswe are exquisite workmanship, models complete, the dc motor control principle of brushless dc motor control principle, to make the motor rotation, the first control department must be based on the induction to the position of the motor rotor, and then according to the stator winding decided to open (or closed) inverter power transistor in order, makes in the AH, BH, CH (these are called upper arm power transistor) and AL, BL, CL (these are called lower arm power transistor), the current flowing through the motor coil in a sequence forward (or backward) a rotating magnetic field, and interact with the rotor magnet,This enables the motor to turn in time/against time.When the motor rotor turns to the position of hall-sensor to sense another set of signals, the control department starts the next set of power transistors again. In this way, the cycle motor can continue to rotate in the same direction until the control department decides to stop the motor rotor, then the power transistor is closed (or only the lower arm power transistor is opened).To the motor rotor reverse power transistor opening sequence reverse.
In the speed control of high speed, it must consider whether the CLOCK resolution of the system is sufficient to grasp the time of processing software instructions. In addition, the data access mode of hall-sensor signal changes also affects the processor efficiency, accuracy of determination and real-time performance.As for the speed control at low speed, especially the low speed starting, the hall-sensor signal returned will change more slowly. Therefore, how to capture the signal, how to process the time and how to properly configure the control parameter values according to the characteristics of the motor are very important.Or the change of speed back transmission can be taken as the reference of encoder to increase the signal resolution in order to get better control.The motor runs smoothly and responds well, and the proper P.I.D. control is impossible to ignore.As mentioned before, the BRUShless DC motor is controlled by closed loop, so the credit number is equivalent to telling the control department how much the motor speed is still short of the target speed, which is the error
