Brushless motor controller is to rely on support, simple structure and single current in numerous motor controller products run faster, their knowledge of velocity measurement is introduced as follows: 1, the principle of hall effect speed measuring method of brushless motor controller of magnetic steel shaft drive shaft rotation, the changing magnetic field size, through the hall circuit converts magnetic field changes to the pulse signal, cosmetic enlargement, rectangular pulse signal output. When the speed changes, the output pulse frequency can change. Dc gear motor controller rotational speed is obtained. 2, photoelectric speed measuring method of using grid disk and optical switch speed measuring system. When the brushless motor controller through the transmission part of the grid disk rotates, the speed photoelectric door to obtain a series of pulse signal. The pulse signal by single chip microcomputer with two timer/counter, a count a timing. Calculate the number of pulses per unit time m, through unit conversion, you can calculate the motor rotation speed controller.
