AoE x-Chapters 9x.23, sending power on a beam of light

Winfield Hill · 2019-10-06T13:00:56+00:00

AoE x-Chapters, section 9x.23, power on a light beam. For my electrospinning project (recall 15kV+4kV=19kV, now 30kV), we need to power an LED voltmeter module, to measure the nano-thread production current on the high side of a 6kV power supply. Measure to 0.1nA with a 10k resistor. DATEL (now Murata) DMS-40PC is a 4.5-digit meter; it needs 5V at 35mA = 180mW. I don't trust the long-term reliability of isolated dc-dc modules at 6kV, and we might need to do 25kV. In section 9x.23, we used a 100-watt COB LED with a 65x65mm solar panel, spaced at 25mm, and got 750mW. We got 300mW from a 25x35mm panel, with LED at 35W. -- Thanks, - Win

Oct 06, 2019 21 Replies

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Piglet 6 years ago

Pardon the dumb question - but if there is already a 10-100k current sense at low potential why all this complexification with isolated current sensing floating up at many kV?

piglet

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Winfield Hill 6 years ago

In my case, the collection plate is at -3 to -6kV.

Thanks, - Win

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