I need to do some inrush testing for a PMDC motor. The voltage is 280VDC and I expect the inrush to be between 47 and 55 amps. I need to supply the current for less than 10 seconds. I could get a large DC power supply but the cost of that and the associated wiring is quite expensive especially...
Thanks for everyones replies as this still is kicking my butt.
The motor is a 4 pole PMDC that has a 5" OD. Currently it is running off of 115 VAC right through a 400V 30Amp bridge rectifier. With the 7400 mF cap (3"x6") it smooths the DC very well and the motor is always drawing current as I...
I miss spoke earlier. The cap I used (rather large) was a 7400 mF. I happen to have a couple laying around. Just to clarify, my commutation was greatly improved when I used the cap vs. no cap. Currently out of my rectifier I am running 127V RMS. With the cap in there it bumps the voltage to...
I am trying to improve the commutation. After about 12 hours of run time the commutator starts pitting and the motor really goes down hill. I tried running it with an off the shelf SCR drive and it performs the same way. If I run the motor on straight DC it performs beautifully. My goal is...
I am working on a 1.5 Hp PMDC motor that is run off 115 FWR. If I look at the current waveform on the scope it is pulling a peak current of 28.5 Amps every 120 Hz and the current going to zero in between the peaks. My RMS current reads 14.5 volts. I need to make some sort of filter for the...
