General Question on Power Output of Motor

Thread Starter

Benjamin0904

Joined Oct 3, 2020
22
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
 

Chris65536

Joined Nov 11, 2019
254
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.
 

Thread Starter

Benjamin0904

Joined Oct 3, 2020
22
Yeah its permanent magnet, but I am pretty sure I was not exact with the 93% conversion efficiency. Somewhere close to there though. It's not AC.
Thanks.
 
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