Brushless dc motor controller is widely used in household appliances, auto parts, power tools, office automation, industrial equipment, medical equipment, personal care, robots, and many other industries. Recently, r&d efforts devoted to high speed large torque of the new motor controller of research and development, is the new type of brushless motor with high torque controller can be available after 2 months. we also have co-operated with the foreign some famous medical equipment company, due to the medical device products more strict to the requirement of the motor controller, power output and torque is compared commonly big, so the new type of high speed large torque of dc motor controller development, will have a very good market prospects, especially in the area of large medical equipment application.