Research On Switched Reluctance Motor Drive System For The Electrical Bicycle

Recently, with the modern city's rapid development, the city scale is enlarging continuously. The city traffic, the environment pollution and the energy sources problem also are concerned increasingly. The developed countries not only research and develop the new electric vehicle, but also develop electric motor and bicycle actively. Without doubt, it is one of the most attracted developing directions in China to the research and development of electric bicycle and motor according to the average per capita income and people living conditions, as well as the economic strength and the technology condition of relevant enterprises.This paper brings forward electric bicycle system which is driven by Switched reluctance motor, aiming to the inherent demerit of the permanent-magnet brushless DC motor(PBLDCM) extensive used in present electric bicycle market and the small passage range problems resulting from the low-energy density of lead-acid accumulator. The SRM drive system specially is suitable to the working need of electric bicycle by reason of many merits such as good starting ability, outstanding performance in a wide speed range, and convenient switch between electric and regenerative braking mode. At first, aiming to the special demand of the external rotor motor, three kinds of different structure SRM are contrasted the performance of starting, over loading and efficiency, and the direction optimizing the tooth pole is educed. Then, the electric bicycle dynamics model based on MATLAB/SUMLINK nonlinearity inductance model is built. It carries out the parameter optimization of the electric and regenerative braking mode, and analyzes detailedly the optimization strategy of the regenerative braking mode. Accordingly, a control strategy fitting to the experiment sample is educed. Last, the hardware and software of the electric bicycle drive system on the basis of DSC chip dspPIC30F3011 are developed, and achieve the electric bicycle's many functions such as cruising speed, broken-electricity brake and the protection for over voltage, under voltage, over temperature of power module, and carry out the experiment to verifying the simulated parameter optimization effect. And the sample system achieves the expected object.