stube40
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stube40 said:If I used an opto-coupler, the only remaining problem is what to do with the ground for the resistor-divider voltage measurement feed that allows the CPU to measure the amplitude of the high-power voltage source. Maybe using the CPU's differential ADC inputs?
IanP said:To provide power to the isolated side you need a dc/dc converter ..
There are hundreds of them available on the market and they come in several voltage and wattage ratings ..
For example, the NMA1215 takes 11-13V (as input) and produces +/-15V (as output) ..
If you have, look in the RS Components book, page 240-250, or visit their website ..
Rgds,
IanP
Without connecting grounds there is no way you can provide any reference, but with good surge protection that shouldn’t cause problems ..will I need to connect the minus rail of the DC-DC output to the GND of the 150V / 40A PSU
I have seen clearer questions at edaboard...a CPU to control the on-off state of a high power IGBT
stube40 said:Just for clarification, the 15V DC/DC are giving out 0V/15V or +/- 15V?
stube40 said:If I wanted to be modular and wasnt worried about cost, could I also use 2 on the low side for neatness?
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