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Old 01-21-2017, 04:08 PM   #3014 (permalink)
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Originally Posted by kalidasbala View Post
Btw, is there a formula to calculate the precharge resistor value? Also can I use an automotive relay (12v).
The precharge resistor value is a function of capacitance, time and voltage.
I dont have a formula though. Or... i found this
Use a relay that can handle the voltage. I dont think a 12v relay will do the job

Originally Posted by kalidasbala View Post
You are using 25v as HV and running a 208Vac 3PH motor? What kind of batteries are you using?
I was using a:

Then i used 3 in series, making it 75 volts.
I use them only for testing, for my convenience...

Last edited by motorulf; 01-21-2017 at 04:14 PM..
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