The DC motor is commonly used as driving equipment in the industrial scene. A speed control and test system of DC motor are proposed whose core is the single chip computer AT89S51. The design structure of the system's main circuit, driving circuit and system of software is given. The system conforms to the current trend in o-verseas development, fully utilizes the advantages of single-chip, and has the characteristics of high frequency and fast response.%直流电机是工业现场中常用的驱动设备.提出了以AT89 S51单片机为核心的直流电机调速与测速系统的设计方法,给出了系统的主电路结构,以及驱动电路设计和系统软件设计.本系统的设计顺应了电子技术的发展趋势,充分利用了单片机的优点,具有频率高、响应快的特点.
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