Zhang, a Shanghai native, is a senior electrical automation engineer. 1956 graduated from shanghai dianji university (now named) majoring in electrical automation, and has been engaged in industrial automation for more than 50 years. Participated in the construction of Changchun No.1 Automobile Factory, Luoyang No.1 Tractor Factory and Hangzhou Tape Factory in the early days of the founding of the People's Republic of China.1From June to August, 1985, he went to Yaskawa Electric Co., Ltd. in Japan to study frequency conversion speed regulation technology. 1995, specializing in the application and development of frequency converters. He has published more than 80 papers in Inverter World, Electrician Technology, Electric Age, Electric World, Automation Expo and Proceedings of the National Annual Meeting on Electrical Technology and Energy Conservation, and compiled Inverter Application Experience, Medium and High Voltage Inverter Application Technology, Inverter Speed Regulation Application Practice and Inverter Fault Diagnosis and Maintenance.