Search found 4 matches

by ki7ay
Thu Jul 24, 2008 8:17 am
Forum: General Discussion
Topic: Need PWM with current regulation 8-18 volts DC max 30 amps
Replies: 9
Views: 2168

PWM current limit

Hi Phil.

That is a very interesting suggestion. I was leaning towards a PWM motor controller and a 0.1 ohm 1% 25 watt precision resistor inline to sense current. A comparator circuit sounds like a good idea for this application.

Thanks for your input.

Jim Darrough
by ki7ay
Thu Jul 24, 2008 7:50 am
Forum: General Discussion
Topic: Need PWM with current regulation 8-18 volts DC max 30 amps
Replies: 9
Views: 2168

PWM Power Supply

No, 50 amps is way too high. All I am looking for is a way to provide regulated current under varying load and varying supply voltages. I have seen PWM motor controller circuits online that are pretty inexpensive to purchase and relatively simple to build, but as I mentioned, I want to set the curre...
by ki7ay
Wed Jul 23, 2008 2:27 pm
Forum: General Discussion
Topic: Need PWM with current regulation 8-18 volts DC max 30 amps
Replies: 9
Views: 2168

PWM

Hi Al.

The input will be from an automotive alternator, which as you know means a voltage swing from about 12 to 14.6 or so.

Thanks for looking.

Regards, Jim
by ki7ay
Tue Jul 22, 2008 2:46 pm
Forum: General Discussion
Topic: Need PWM with current regulation 8-18 volts DC max 30 amps
Replies: 9
Views: 2168

Need PWM with current regulation 8-18 volts DC max 30 amps

I would like help coming up with a PWM that I can use to provide regulation to a hydrogen generator system. It would need the following: 1. Current readout inside the car (LCD??) 2. Ability to set the current inside the car. 3. Capacity of no more than about 30 amps. I would like to be able to set t...