PMSM Drive System Based On Artificial Immune For FSEC And It's Efficiency Optimization

Nowadays, human's excessive demand and consumption for fossil fuels lead toincreasingly serious problems such as global warming. In recent years, continuous hazeweather, up in China, threat to people's health seriously. And the processing of haze isdifficult and expensive to the government. For using only electricity to provide power,pure EVs (electric vehicles) consume no fossil oil and do not pollute the air. Hence, wecan solve the problems above effectively by developing the EVs rapidly and finallyreplacing the traditional internal combustion engine vehicles. As the heart of EVs, theperformance and efficiency of drive motor will make pivotal impacts of the vehicles'dynamic and energy saving performance. Permanent magnet synchronous moto?rPMSM?,compared with many other motors, has many advantages and is very suitable forapplication in the electric car driver. The rapid development of Formula Student ElectricChina?FSEC?can quickly provide new talents to China's EVs field. The performance ofmotor drive system for FSEC has a great impact on the dynamic performance and energysaving ability of the car. At the same time, dynamic performance and energy saving abilitywill affect the results of the competition greatly. Therefore, this paper takes anexperimental FSEC into the research object. Aim at the problems of improving controlperformance and efficiency of the PMSM drive system, many study works have done. Sothe subject of this paper is of great significance. Our detail works are:1. For the specialty and the selection principles, the performance requirements of thedrive motor of FSEC racing car are analyzed; and the structures, characteristics andmathematical models of PMSM for FSEC are analyzed and introduced.2. The principles of vector control method for FSEC drive PMSM and the SpaceVector Pulse Width Modulation (SVPWM) technology are analyzed. A fuzzy immunefeedback controller is designed based on the immune feedback theory, which is applied inthe speed loop and current loop of the PMSM vector control system.3. This paper introduces several common efficiency optimization strategies of PMSM.The special requirements of efficiency optimization control method of PMSM drivesystem for FSEC are analyzed. For the disadvantages of search contro?lSC? optimizationmethod,an efficiency optimization controller based on Loss Model Control (LMC) methodfor FSEC PMSM drive system is designed to improve efficiency of the system.4. A FSEC dynamic model with single degree of freedom is set up in theMATLAB/Simulink environment. By integration with the PMSM drive system using the controller designed in steps above, according to the actual parameters of an experimentalFSEC and it's PMSM, an integral simulation model of the vehicle is built.In order to verifythe control effect and test the dynamic performance of the FSEC, using the subsystemsmodels above and the integral FSEC vehicle model, several groups of simulation test areconducted respectively. Results verify the superiority and feasibility of the designed fuzzyimmune PI controller and efficiency optimization strategy.