| This paper has paid more attention to the optimization design of permanent magnet synchronous machine (PMSM) and system performance analysis of serial and parallel hybrid electric vehicle (SPHEV).Firstly, the research background and significance are expounded. The status quo and development trend of inside and outside national EV have been analyzed. The main types of EV have been summarized at present and SPHEV has been selected. The main technologies' development status quo of HEV has been analyzed, including battery and its management system, high power bi-directional DC/DC converter's topology technology and control, the motor and its driving and control technique, multi-power-source control strategies and vehicle management, simulation technology of HEV. The development status quo of rotor structure, flux-weakening control and sensor-less control of PMSM for HEV has been introduced in detail. The two interior PMSM (IPMSM) MG1 and MG2 have been selected as the motors in SPHEV by analyzing various existing motor performance and development status quo of PMSM.Subsequently, based on the Prius SPHEV generator's working on unidirectional way, the composite SPHEV has been proposed, whose two motors can work on motor-generator bidirectional power flow. The composite SPHEV has more working modes with high working efficiency. The initial parameter calculating and important parameters optimization analysis of two IPMSM MG1 and MG2 have been done according to the various operation modes' requirements. The transient simulation analysis of more than 10 working modes including starting, power assisted, power generation and electric operation have been carried out. The simulation results have fulfilled the requirements of various working modes, such as that the efficiency 39% of energy-recover of vehicle's Braking has been attained.Then, the back EMF of transient including electric transient under stationary status of rotor has been selected to determine the position of rotor based on the rules of quick, accurate and easy to be measured after the relationship between inputs-outputs and rotor's position has been analyzed. The normalization method among the three phases back EMF has been first put forward, by using which the normalized data has no relationship with the amplitudes of back EMF and the problem of low-speed small back EMF amplitude with big error has been solved after the relationship between the back EMF and speed and position based on motor and generation modes has been analyzed.The composite invertible conditions have been proposed with creativity according to the periodic data. The accurate judgment of the rotor's position has been very well realized under stationary, mechanical movement, motor and generator status. The simple, easy and quick sensor-less control of position and speed has been attainted. At the same time, in order to overcome the shortcomings of low efficiency under high speed with flux-weakening, the control idea of boost under motor status and flux-strengthening under low speed status has been proposed from structure design and performance analysis by using the motor design and transient analysis software of ANSOFT. The wide range running of IPMSM with high efficiency has been basically realized with no flux-weakening under high speed status.Subsequently, the paper has introduced the topological structure of DC/DC converter in detailed. The relationships between the output characteristics of non-isolated DC/DC converter and the electric parameters of L and C and control parameters D and f have been analyzed. The PWM control characteristics of three kinds of familiar converters of voltage controlled SPWM, space voltage vector PWM (SVPWM) and current regulated PWM (CRPWM) have been discussed. The relationships between switching frequency of CRPWM and voltage and hysteresis band have been analyzed, which provides theoretical basis for the design of motor controller including the components' selection and control algorithm of software. The tracking effect is good according to the tested result of the designed high performance CRPWM converter.At last, simulation software Advisor parameters setting, simulation modules' mathematical description, modules' building have been mainly discussed. The secondary developments for the designed composite SPHEV have been done based on the Prius SPHEV in Advisor. The vehicle, generator, motor and composite power module have been shown. The simulation results have proved the feasibility of the control strategy. The analyzed results show that One-Hundred-Kilometer Fuel Consumption and emission of the vehicle can meet the needs of vehicle development and greatly improve the energy saving and environmental protection.
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