Design And Realization Of Small Wireless Power Transfer Device

Wireless power transfer device was overcome the drawbacks of the directtransmission of power through the metal contact. Such as sliding wear, contacting sparkand unsafe conductor bare, it prone to security incidents for directly inserted and pulledout in the flammable, explosive, high temperature, humid environment. Wireless powertransfer device with a safer, more reliable, more durable electrical characteristics, whichhas an incomparable advantages for energy access in the special environment offlammable, explosive, water environment.This paper introduces the basic principles of small Wireless power transfer device.Use of the magnetic circuit equivalent model had finished the electromagnetic structureof analysis. Analysis of the electromagnetic field distribution of the different corestructures and planar connector energy access institutions coil winding with theMaxwell software. Design a main circuit, secondary circuit and coupling compensationtopology, which according to the basic principles of small Wireless power transferdevice. Design a control program with the soft switch control and load identification forthis device. Build a M-file in Matlab according to mutual inductance equivalent modeland the stroboscopic map model, which used to verify and find the frequency of thedevice soft-switching point. Build a power circuit simulation module in MatlabSimulink which verified the power and efficiency of the working device. Verifiedsecondary circuit output voltage value in Saber software.Finally build the experimental device, the device output power is150W, the outputvoltage is48V, the device efficiency is81.67%at full load, standby consumption lessthan2W, the device has a load identification feature.