Study On The Wireless Energy Transmission Control Of Magnetic Induction

In ocean exploration, UUV is widely applied, but its continuous operation ability is poor because of size and weight constraints. The power supply can timely supply electric power to detection equipment. The traditional cable supply mode consume too high, while the submarine power station can do power supply efficiently. For underwater detection equipment, the current power transmission mostly need direct electrical contact to point,easy to Water Leakage accident leakage under water. The electric energy transmission system based on the technique of induction coupling don't need for direct electrical contact,the system do conversion between the power and the energy can be completely sealed, so as to improve the reliability of detection equipment of water charging.Firstly, design the inductively coupled power transfer system based on the induction coupling technology. The system includes hardware circuit, loosely coupled transformer(separable), DSP minimum system and other parts. Establishing the transformer, equivalent circuit model based on loosely coupled transformer characteristics. Reach the influence on the transmission performance of the system from frequency changes and other factors based on impedance expression derived. Select initial / sub series compensation structure through the comparative analysis of the effect of eight kinds of conventional compensation structure to the system transmission power, efficiency.Secondly, design the hardware circuit and the coupler. Select materials and models of core based on the comparative analysis of a variety of material properties, the symmetry,size and other factors. Select the nominal diameter of the enameled wire group in order to avoid skin effect caused by high frequency current flowing through a conductor and the proximity effect, and check if coupler can accommodate a corresponding number of turns.Do the finite element analysis of the coupler designed in the finite element software ANSYS, and change the gas gap distance, compensation structure, winding location and other conditions in the model to obtain transmission efficiency, transmission power changing tendency in different situations. Prove the advantage of the primary / secondary series compensation structure on transmission performance again.Thirdly, design each part of the hardware circuit of system based on the coupler and finite element analysis, include inverter, rectifier and filter, isolation, power amplifier, relay control, current and voltage detection circuit. Complete selecting the size and type of the corresponding device of each part of circuit.Finally, complete the inductive coupled electric energy integration and transmission system test, including design of program in DSP minimum system, control algorithm and hardware platform (performance) performance verification. The program is to PWM signal generation, dead to join, and phase setting etc. In the design of the controller algorithm,build closed-loop induction coupling charging control system in MATLAB based on the battery charging method and the use of modules, The design of hysteresis controller to the constant current control, the design of double closed loop controller to the constant voltage control. Complete the integration of system hardware platform. Verify the characteristic function and performance through inductive coupled power transfer test and change the system parameters.