Research On A Contactless Power Supply Based On DSP Realize

The contactless inductive coupled power transfer system is one of the newest power transfer technology, which transmit energy to load by electromagnetic coupling and without electrical connection or physical contact, what's more, it comb-out contact existence of electric spark completely, reduce mechanical wear, and have the characteristics that safeguard operating non-maintaining or low. It has been developed rapidly with its security, environmental protection, free maintenance, having a good adaptability etc.This text has introduced the principle, basic structure and current development situation of the contactless power supply based on ICPT technology at first, and analyze the realize structure of loosely coupled transformer as the key part of contactless power transmit system, moreover, derive out the mathematics model of the loose coupled transformer on the basis transformer of routine and computing method of its key parameter. Analyzing the magnetic circuit of the loose coupled transformer, as it's magnetic resistance on the high side and it's coupling rate on the low side, for get most heavy electric energy transmit efficiency, we carry on the ANSYS simulate on the condition of different distance between the fist coil and the second coil and have found out the transformer structure and power transfer efficient which have offered the theoretical direction for research of the loosely coupled transformer.In order to reduce transmit loss, improve the electric energy and transmit efficiency, High frequency resonance convert based on shift-phase full-bridge ZVSZCS-PWM controlled is adapted, that topology achieved zero voltage and zero current soft switch and have reduced the electric current and voltage assault to the power device. And reduced the circuit loss effectively, improved transmit efficiency. MATLAB simulations verify validity of the controller.In the last part, the hardware design of non-contact power supply is proposed based on DSP (TMS320F240), the central control circuit and is described in detail, and also parts of the main program flow charts of the control system are given out.