| With the rapid development of the vehicle industry, the situation of the energy and environment is getting more and more serious. Therefore the development and innovation of the new energy automobile is urgent for the whole industry. For the recent years, many countries and scientific research institution have invested a lot of material resources and manpower to research the new energy vehicles. The new energy automobiles include hybrid electric vehicles, electric vehicles and fuel cell electric vehicles. With the advantages of high reliability, fuel economy and less pollution gas emission, the hybrid electric vehicles have become the important measures to relieve the energy the environment issues. It is known that the hybrid electric vehicles have two power sources, namely the internal combustion engine and the battery. The flexible condition can be realized through the cooperation of the motor in the whole power system. The hybrid electric vehicles are categorized as the series, parallel, and series-parallel according to the power transmission mode. Also they can be categorized as the Extended Range Electric Vehicle(EREV) and the Plug-in Electric Vehicle(PHEV) by the power ratio of the engine and motor. EREV can realize all the power performance in the electric mode. However when the battery cannot drive the vehicle to move longer distance, the auxiliary generating set, namely the Extended Range equipment(ER), provides the electric energy for power system for longer distance. Because the EREV has two power sources, the energy management control strategy becomes very important. How to distribute the energy of the two power sources reasonably and efficiently becomes the key to improve the vehicle operating efficiency and increase battery pack service life. In this paper the peak power highest charged state control strategy is proposed for EREV based on Brushless Dual-Rotor Flux-Switching Permanent Magnet(BDRFSPM) motor. And the validity of the control strategy is verified by the Advisor simulation software. The specific work is as follows:1. This paper explains the background and the significance of the project research, points out the necessity of the electric vehicle development,introduces the present development situation and key technology of EREV, and draws forth the methods and significance of the energy management control.2. The power-driven system structure of EREV studied in this paper is illustrated in detail. The basic structure and working principle of BDRFSPM motor is described. The mathematics model is deduced. And the different working modes of EREV based on the BDRFSPM motor is analyzed, which provides theoretical support for the proposed control strategy, simulation analysis and experiment verification.3. In order to allocate the energy of EREV based on the BDRFSPM motor reasonably, the peak power highest charged state is proposed and the basic principle is explained. The simulation model is built in Matlab. And the working condition of the engine and motor in NEDC operating condition can be obtained through the simulation.4. To analyze the performance of the vehicle including the battery performance clearly, the vehicle model, the engine model and continuously variable transmission model are built in the Advisor software. The state of charge of the battery, the fuel economy and the emission performance of the EREV can be obtained through the simulation. Simultaneously compared with the switching type management control strategy, the proposed control strategy can improve the fuel economy and emission performance better.5. Finally the prototype motor is produced and the experiment platform is built. The characteristic of the BDRFSPM motor with no load, the operation with electric power and the operation of hybrid driving are tested. The experiment results show the validity of the BDRFSPM acting as the vehicle motor and the reasonability of the energy management control strategy. |
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