Design of small power servo brushless DC motor driver

摘要

Based on the integrated circuits LM629 and MC33035, a design method of small power servo brushless DC motor (BLDC) driver is presented, and the main control circuit, the driving of power circuits and the structure of software are introduced yet in the paper. This driver can communicate externally with RS485 bus and accomplish speed servo and position servo with the scheduled parameters. The experiment shows that the driver provides good stability and precision when driving the 18V 80W brushless DC motor.