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Air-core inductive charging systems offer significant weight, cost and reliability advantages over competing ferrite based solutions at the expense of reduced coupling factor. Acceptable magnetic link efficiencies (>95%) can nonetheless be achieved by operating at MHz frequencies where the coil Q is inherently very high (>1000). We present a design approach for transmit-side power electronics...
A silicon carbide (SiC) class E inverter for 6 MHz mid-range inductive power transfer (IPT) has been experimentally shown to offer improvements of 13% in efficiency compared to a previous state-of-the-art silicon (Si) equivalent, whilst delivering 100 W to the load. Using newly available ultra-low gate charge half-bridge GaN modules from Texas Instruments, a custom resonant gate drive has been designed...
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