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Old 06-05-2009, 02:36 AM
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sucahyo sucahyo is offline
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Join Date: Dec 2008
Posts: 3,073
I think the best duty cycle for this kind of circuit need to be experimented. On my experiment of coil collapse current circuit, 10% ON at 2KHz is a lot cooler than 50% at 50Hz. Cool enough to let it run 8 hour a day for few month at 0.4Amp.

I think there should be sweet spot frequency or duty cycle for heat generation too.