When there is a certain brushless motor controller failure, for it is indispensable in the pulse width modulation, in order to let you better modulation, the following will introduce its modulation method for you, also suggest that you can thoroughly mastered. Pulse width modulation can be programmatically controlled by a PWM output to produce, can also be used for PWM chip to achieve. When the PWM wave frequency is too high, its controller of dc motor driving power tube asked too much, and when it's frequency is too low, it produces electromagnetic noise is big, in practice, when the frequency of the pulse width modulation wave around 18 KHZ, the best effect. In the brushless motor controller design of the circuit, based on the principle of the circuit design of the hardware circuit, the measuring device can measure speed range larger speed brushless motor controller. Through motor controller of each rotation, can through infrared tube speed measuring circuit, thus to accumulate, finally through the different values, in the 1 s time can know the specific size with different levels of speed. In a fixed time period of laps, duty ratio is different, the infrared to the size of the tube speed measuring circuit is different, the last on the digital tube can display speed by software programming specific values. We have finished to introduce to the knowledge of the equipment have a certain understanding, that is some basic information about the brushless motor controller, it is advised to refer to, will help to understand and use it. Changes in: 2015. 2. 9
