AC PMSM Servo Technology

　　AC PMSM Servo Technology
　　Servo is a primary technology of modern industry. With developing of this years, alternating current servo has taken the place of direct current servo in many situations step by step, while three-phase alternating current Permanent Magnet Synchronous Motor is one kind of alternating current permanent magnet servo motor. Due to improvement of performance and falling down of price of permanent magnet and a series of advantagies, brought by Neodymium Magnets the substitute for field excitation winding in wound rotor, such as no heat generation of rotor, with a simple control system, higher efficiency and speed and so on, three-phase alternating current Permanent Magnet Synchronous Motor has been applied widely in such low power ways as numerical control machines, robots and so on.This paper introduces a alternating current permanent magnet AC digital servo system whose hardware is based on DSP (Digital Signal Processor) and IPM (Intellect Power Modular) and in which feed control was adopted in position loop to improve the performance. This system uses the DSP as the main controller, in which position loop, current loop and speed loop were implemented. In alternating http://www.999magnet.com/products/110-sintered-neodymium-magnets servo digital system DSP is the signal processor, Intellect Power Modular is inverter while rotation code device and current flow sensing element supply the feedback signal. The signal coming out from sensing element goes back to DSP to be calculated after disposals of wave filtering, shaping and so on. DSP adjusts the position loop, current loop and speed loop in servo system throughing the disposals of reference signal and feedback signal and outputs PWM signal, then servo closed loop control of motor will be realized after isolated driving IPM modular.