Hello, i have some questions about my HV pcb.There’s things i use a lot on low voltage but i want to ask for HV.
1. I pass the 230Vrms through rectifier and have an 325VDC.I want a LED just for debug/display when its powered on.
I can use some resistor and common LED (Vf about 1.7V).Lets say (325-1.7)/10mA = 32.3kΩ. But as i calculate the W on resistor will be about 3WI can power the LED with lower current and use 1W resistor.Correct on above thinking;Or its better use some other (dunno) LED for those volts;
2. I will measure some AC currents with LTS-6NP.AC currents coming from 6 N-IGBT switching.Do i realy need low pass RC filter;And if yes, does an fitler with cut-off 1.5Hz will be ok for 10kHz switching;
3 I need an stable 15V supply.I am going to use an 230VAC-18V/20VA PCB-Transformer.After rectifier i will have about 25V.Will 7815 will working proper for currents below 1A or there will be issues;The big voltage difference and power dispiration troubles me.