Study Of Permanent Magnet Synchronous Motor Drive And Regeneration Energy Feedback Based On DSP

Motor system energy saving is one of the ten projects which are national major energyconservation projects. As a high efficient AC motor, permanent magnet synchronous motor iswidely used in different situations. The research of PMSM controlling is the key to itsnormally working, at the same time, there is a number of kinetic energy when the motor isunder braking, saving the kinetic energy can improve the efficiency of PMSM system aboutenergy conservation and emissions reduction. Comparing to the traditional motor, PMSMcost is higher than traditional motor, the cost recovery period is long. At present, how tocontrol the PMSM precisely, meanwhile solve the problem about PMSM kinetic energy hasbecome a research hot spot in related field.Under the support of the National High Technology Research and Development Programof China which is called “863”project(No:2012AA110702), the National Nature ScienceFoundation of China(No:E51375173) and Strategic Emerging Industry Core TechnologyResearch Project of GuangDong Province(No:2012A032300007), this paper analyzes theresearch of PMSM driver and regeneration energy feedback, designs a new type of PMSMdriver based on DSP which not only control the PMSM accurately but also achieve thekinetic energy feedback.This paper analyzes the research process of PMSM driver and regeneration energyfeedback. Aim at PMSM characteristics, it offers PMSM math models and the theory ofregeneration energy, through the design of hardware and software, it builds the systemexperience platform completely. Under the result of simulink and experiment, this paperverifies the design. The main contents of this paper includes as follows:1. This paper studies the PMSM math model under three different coordinates. Then,research the SVPWM control principle and regeneration energy from the theory level, layinga solid theoretical foundation for the following system design.2. According to the requirements of PMSM and system performance, this paper putsforward the bi-directional DC-DC converter and three-phase inverter, combines them to thePMSM driver hardware system, and designs each module of main circuit in details. 3. Adopting TI DSP chip TMS320F28335for the control core. This paper builds thedigital control system for PMSM driver, designs the control circuit, compiles the system mainprogram and interrupt service routine completely.4. After building the PMSM driver system experimental platform, this paper providesthe math model for the PMSM driver system through the MATLAB Simulink platform. Theresult of MATLAB Simulink and experiment verify the feasibility of this design.At last, the PMSM can work normally under the condition of a wide range betweeninput and output voltage, meanwhile, there is a stable output voltage when the PMSM isunder braking, as a result, saving part of PMSM kinetic energy so as to achieve highefficiency of energy saving and emission reduction.