On the evening of April 2nd, 18:30-19:30, Changsha Jianke Electronics Co., Ltd. No. 2 training on the advantages and disadvantages, basic principles and applicable conditions and scope of the common sensorless position detection algorithm for square wave platforms The training room on the 5th floor of the R&D building was successfully held. A total of 14 people from the company management, technical department, and sales department participated in the training. Through this training, everyone learned the basic technical principles of square wave control of DC brushless motors, as well as various algorithms. Advantages and disadvantages and applicable conditions and scope.