# General Question on Power Output of Motor

#### Benjamin0904

Joined Oct 3, 2020
32
Hi everyone. I have a question on the basic workings of a DC generator. I have a 3000 RPM @ 115V Motor with 93% conversion efficiency. It is an 800W motor. If I spin the motor at a constant 500rpm, how many Volts and Amps am I producing. I simply don't understand the math behind it.

Thanks,
Benjamin

#### Delta Prime

Joined Nov 15, 2019
1,326
Hi everyone. I have a question on the basic workings of a DC generator
Hello there

These are the parts of the basic working DC generator use as reference only thank you.

#### Benjamin0904

Joined Oct 3, 2020
32
I believe you misunderstanding because of my mistake in wording. Did you read the rest of the question??
how many Volts and Amps am I producing
Thanks.

#### Chris65536

Joined Nov 11, 2019
270
Hi everyone. I have a question on the basic workings of a DC generator. I have a 3000 RPM @ 115V Motor with 93% conversion efficiency. It is an 800W motor. If I spin the motor at a constant 500rpm, how many Volts and Amps am I producing. I simply don't understand the math behind it.
Is it a permanent magnet DC motor? That's the only way I could see this working. The voltage would scale almost linearly with the RPM, so 1/6 of 115V is about 19V. The amps drawn depends on the load. I suppose the maximum amps would go down with RPM too, but I'm not really sure. 115V sounds like an AC motor though, and that won't work for this.