Abstract
Motor controller is on the way of digital and integration. In the country, outdated motor controllers made of analog circuit are prevailing in our family life. In one hand the advantages of BLDCM system have been recognized, in the other hand the price of permanent magnet material and microprocessor have sharply declined.. Thus it is a great opportunity to develop digital BLDCM control system.
The principle of speed control system for DC motor is briefed Full digital. speed control system for DC motor, which consists of MSC-51 single-chip processor, is presented. System configuration is briefed, The design rules and realization schemes of each functional module are described in detail. Beginning with the theory of the DC timing system and by contrasting it with the low exponent typical system it presents the parameters of the current/velocity controller , then in the aspect of microcomputer control, it has discussed the principle of number touch off、number velocity testing 、current/velocity controller and presents the hardware scheme to achieve it.
To MCS-controlled core of the AC motor speed control system than the general speed of the system has great advantages. Due to the fixed rate and the number of guns used to a very wide scope precision gun, the governor expanded the scope improve the speed control accuracy; As hardware highly concentrated, and the number of spare parts Contact greatly reduced. Many functions can be passed to complete. Made to simplify the hardware fault than most of the control system much less. 8051 SCM to digital signals, flexible control, anti-jamming capability has been greatly enhanced.
Key words：DC motor speed control system digital control phase locked loop
