Using the technique of thyristor and microcontroller to realize soft start and soft stop for motor is a better method that is adopted at present, but its price is more higher.
利用晶闸管、单片机控制技术实现电动机软起动和软制动是目前普遍采用的一种较好的方法，但其成本较高。
This paper mainly studied using STC series microcontroller control PWM signal output so as to realize the speed control of a dc motor control method.
本文主要研究了利用STC系列单片机控制PWM信号输出从而实现对直流电机转速进行控制的方法。
Plan a soft combination, microcontroller do core with simple buffer circuit, can realize the design requirement, advantages, easy to adjust, flexible and can realize the function is very rich.
方案一软硬结合，单片机做核心加上简单的外围电路，可以实现设计要求，优点灵活多变，易于调整，可以实现的功能非常丰富。
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