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This paper describes the system concept and initial results for end-to-end energy-autonomous sensor systems using unmanned aerial vehicles (drones) as agents for power delivery to and data gathering from sensing devices. Such systems may be particularly useful for delay tolerant monitoring scenarios, where sensing devices may be deployed in remote, harsh conditions, often with sparse connectivity,...
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...
Class EF inverters are hybrid inverters that combine the improved switch voltage and current waveforms of Class F and Class F−1 inverters with the efficient switching of Class E inverters. As a result, their switch voltage and current stresses are reduced, and their efficiency, output power and power-output capability can be higher than the Class E inverter. These improved features of Class EF inverters...
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