Generator System Design Of The Series Hybrid Electric Vehicle

Compared with the fossil energy, electrical energy, with its clean, convenient, efficient and controllable characteristics,has been getting increasing attention by people.Due to relatively mature technology, and its obvious effects of energy-saving and environment-friendly, at present, the Hybrid Electric Vehicle(HEV) has turned its small batch production to a big stage of rapid growth, with the preferential policy encouragement of countries in the world.With the Series Hybrid City Buses power system being served as the research object, the double closed loop SVPWM control model of Permanent Magnet Synchronous Generator being served as the research foundation, the process of design and development of 30KW permanent magnet synchronous generator rectifier platform being served as a practical example,this dissertation studies and verifies the control strategy of IPMSG-PWM rectifier.The following factors are including.First, the mathematical model of IPMSG is introduced, and the control system of the generator based on rotor flux orientation is thoroughly analyzed.The dissertation sets up the block diagram and simulation models of the unit power factor control of IPMSG-PWM system, and on this basis,the PI controller parameters of the double closed-loop vector control strategy is designed. Through experiment of 350KW permanent magnet synchronous generator PWM rectifier, the unit power factor control in double closed-loop vector is verified.Secondly, based on the limitation of the unit power factor control strategy of generator rectifier, and the problem of output voltage being elevated by increasing stator inductance to weaken the current harmonics, the d-axis flux-weakening voltage vector control is proposed, by increasing the d-axis weakening magnetic current to whittle the armature reaction of quadrature axis,which can achieve the purpose of the step-down rectifier. In contrast with the waveform of unit power factor control through simulation and experimental analysis of PWM rectifier under rated condition,The dissertation verifies the correctness and feasibility of the weaken magnetic control method.At the same time, flux-weakening control of generator rectifier system is optimized, and the flux-weakening control based on leading angle in the application of IPMSG-PWM rectifier system is put forward,expounding its method of realization in detail, and through the simulation and experiment, by comparing these two the waveforms of flux-weakening control strategy, the effectiveness and advantage of flux-weakening control based on leading angle applied to the generator rectification system is verified.Finally, based on the experience of design and development of 30KW permanent magnet synchronous generator rectifier platform, the dissertation analyzes the rectifier system of generator from each factors such as hardware selection, circuit design, software system and so on, verifying the correction of previous theories by experimental waveforms.