Research On High Power AC Servo System

Limited by the power electronics and permanent magnet materials, the power of the inchoate servo motors and drives was small, and the application field was finite. These years, benefiting from the rapid development of semiconductor technology, high power electronic devices and manufacturing technology of high performance permanent magnet materials have made continuous progress, and the power of AC servo system continues to expand. Therefore, research institutions, universities and businesses in the same field at home and abroad carry out research on high power PMSM and its drive in succession. Following the new trends of AC servo system, the issue carries out the research on the control of high power PMSM. The main works are following:Firstly, The control scheme of id= 0 was analyzed based on the theory of vector control oriented rotor field in the two-phase rotating coordinate system, and the scheme of SVPWM was formulated based on analyzing and deducing its theory. The software and hardware based on control scheme was implemented with 100KW PMSM made by the Servo System Research and Design Institute of ARIM.Secondly, the author analyzed and calculated the overall heat loss of the 100KW AC servo system, on the basis of this, according to the technical requirements and the used conditions, the heat dissipation system with the forced air cooling method was designed. The model was built based on the simulating software FloTHERM, and the design of heat dissipation system was proved effective and feasible by the simulation results.Finally, series of tests were made for high power AC servo system, including the experiments such as the whole system’s temperature rising, starting and braking, and the system’s frequency response, etc. the experiment results proved that the performance of the system was able to meet the design requirements, and the design was reasonable and feasible.