Hopefully? Another 48vdc-240vac Toriod Inverter build.

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poida Guru Joined: 02/02/2017 Location: Australia Posts: 1458	Posted: 03:54am 15 Jan 2023       I like FETs, they can fit inside my small brain. I just tested the double E core choke. something like 13.5 V average 446 uS width 64 Amps at peak L = (13.5 / 64) * 446E-6 = 94uH The LCR meter shows 100.0 at 1kHz Saturation is clearly kicking at after 60 Amps I would use this even to 90 Amps where the effective inductance is 73 uH The current sensor is now shunted with a 15mm2 cable to give more headroom before the sensor clips output. So the two DSO captures use different current calibrations. I prefer to test at low voltages, it's easier to get a component to suit for my hacks. With chokes, it's a simple inverse relationship for time and voltage. Double the voltage means you have 1/2 the time available before the same current is passing through the choke. PWM widths with the inverters we build here are of the order of 3/4 of a 20 kHz pulse, maybe 37 uS. I tested with pulse widths of 450 uS in this post Edited 2023-01-15 13:59 by poida