无刷直流电动机控制器设计

Controller Design of Brushless DC Motor

针对无刷直流电动机的结构特点与控制要求,设计了基于专用芯片MC33035和MC33039的无刷直流电动机控制器。通过研究发现,对控制信号中的转速信号进行预处理可以提高控制器的转速控制精度。于是,采用AVR单片机ATmega48对控制信号进行预处理,同时使控制操作更为安全。相对于完全使用微处理器或数字信号处理器的控制方案,此方案可以简化软件的设计与调试,并且降低成本。实验结果表明,转速控制精确。该控制器实现了高性价比,可以广泛地应用于无刷电动机控制领域。

According to the struetural characteristic and the control requirement of brushless DC motor, the controller of brushless DC motor is designed based on the special integrated circuits MC33035 and MC33039. Pretreating the control signals can improve the precision of rotate speed control, so the AVR single chip ATmega48 is adopted. It makes control more precise and safe. The program simplifies the designing and debugging of software and reduces the cost of the controller. The test results indicate that the rotate speed is controlled precisely. The controller achieves high performance and low cost, and it can be widely used in the area of control of brushless DC motor.