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Radio Wrangler · 12th May 2019, 7:26 am

Taking a step back, perhaps a 1600Hz AC power supply might be a case where the efficiency of a class-D amplifier could save a lot of heat? The problem would then switch to finding one and filtering its output.

I wondered about a car/truck alternator minus its rectifier. The load would have to be split up, if possible, and distributed amongst its three phases. But a rough estimate suggested it would have to be driven at over 12,000 rpm depending on the number of rotor poles. This is likely too noisy and dangerous for the intended application.

David

12th May 2019, 7:26 am	#20
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,905	Re: Power MOSFETs Taking a step back, perhaps a 1600Hz AC power supply might be a case where the efficiency of a class-D amplifier could save a lot of heat? The problem would then switch to finding one and filtering its output. I wondered about a car/truck alternator minus its rectifier. The load would have to be split up, if possible, and distributed amongst its three phases. But a rough estimate suggested it would have to be driven at over 12,000 rpm depending on the number of rotor poles. This is likely too noisy and dangerous for the intended application. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done