At 18:30-19:30 on the evening of April 10, the 4th phase of the technical department of Changsha Jianke Electronics Co., Ltd. on the bus voltage step pair, 4964 stable operation principle analysis and improvement measures training in the training room on the 5th floor of the R&D building It was successfully held. A total of 8 people from the company management and technical departments participated in the training. Through this training, everyone learned how to deal with the problem. Through this problem, they learned the principles of motor control, and made inferences on various platforms to brainstorm risk points.