单片机在无位置传感器无刷直流电机开环起动中的应用

The Application of Single-chip Microcomputer in Open-loop Start-up of Sensorless Brushless DC Motor

基于AT89C2051芯片,针对具有梯形反电势波形的无位置传感器BLDCM的开环起动控制,文章提出了一种软件实现方法,它能有效克服通常的无位置传感器的无刷直流电动机,在起动和低速运行时,由于反电势过小而带来的运行困难。并通过实验验证了这种方法的可行性。

On the basis of AT89C2051 chip, this paper puts forward software methods which is used for trapezoidal sensorless brushless DC motor in open-loop start-up control, and can overcome operation problem due to too low an electro-motive force at the starting and at low speeds. The experimental results shows that the advanced method is feasible.