| Wireless power transmission is a new power transmission technology which is safe and efficient.Using magnetic resonance coupling principle to achieve the wireless transmission of electrical energy has great prospects in the transportation, aerospace, underwater, medical, etc.In this paper,the principle of magnetic resonance coupling wireless power transmission system, current situation and existing research difficulties were introduced, focusing on magnetic resonance coupling wireless power transmission system to the front stage power supply.Through the current major-power power inverter topologies:full-bridge inverter circuit, phase-shifted full-bridge inverter circuit, a series resonant inverter circuit, double-bridge phase-shifting series resonant inverter circuit and several power output adjustment mode Comparative advantages and disadvantages of application of occasions, the system determines the level before the power supply scheme:PAM inverter side power adjustment, series resonant inverter circuit as the inverter main circuit of the inverter main circuit uses PFM modulator based on FPGA. This paper focuses on the use of Verilog HDL-based FPGA chip programming language Dual 180° PFM modulation pulse overvoltage and phase shift, overcurrent, overheating and other functions to achieve fast protection and isolation amplifier designed for amplifying the modulated pulse to drive IGBT. After modelsim simulation and experimental verification, after the power supply using FPGA greatly improved system integration and reflect the speed, reducing the volume and improve the anti-jamming capability of the system.Through theoretical analysis and design parameters, complete with a prototype design and development, power supply maximum output voltage 1000V, the maximum rated power 5kW, the output voltage can be adjusted step. The results show that the power supply meets coupling magnetic resonance wireless power transmission system preamp power supply requirements, to achieve the design goal. |
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