Difference between 2 DC motors Ive a pretty sound electrical/electronic background but i'm a little confused between the specs of 2 motors. One motor is rated 12v @ 80 amps, speed 4100 rpm The other motor (from the plate) says 24v 5100 rpm 4 amps 350w (?) The first motor was used for starting model aero engines, larger sized via a rubber coupling. So using the data on the plate, this motor would be rated at 960 watts. However the other motor says 350 watts, but only 4 amps, a Chinese typo? The second motor, the 24v one was used in a 4mph mobility scooter. However, the confusing thing is that the 'theoretically' more powerful motor, the 12v one is about 10-15% smaller in physical size. I want to use the more powerful one, but which one do i believe? John https://reprap.org/forum/read.php?160,591516,591516#msg-591516 Thu, 16 Apr 2026 06:27:00 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?160,591516,591651#msg-591651 Re: Difference between 2 DC motors https://reprap.org/forum/read.php?160,591516,591651#msg-591651 The Scooter motor is rated for continuous running. They can deliver much more power for a short time as well.
It all depends on the brushes ( size and quality ) and a matching controller ( preferably with current limitation )
-Olaf]]> o_lampe Stepper Motors, Servo Motors, DC Motors Tue, 01 Dec 2015 16:43:50 -0500 https://reprap.org/forum/read.php?160,591516,591590#msg-591590 Re: Difference between 2 DC motors https://reprap.org/forum/read.php?160,591516,591590#msg-591590 dc42 Stepper Motors, Servo Motors, DC Motors Tue, 01 Dec 2015 14:30:34 -0500 https://reprap.org/forum/read.php?160,591516,591516#msg-591516 Difference between 2 DC motors https://reprap.org/forum/read.php?160,591516,591516#msg-591516
One motor is rated 12v @ 80 amps, speed 4100 rpm
The other motor (from the plate) says 24v 5100 rpm 4 amps 350w (?)

The first motor was used for starting model aero engines, larger sized via a rubber coupling. So using the data on the plate, this motor would be rated at 960 watts. However the other motor says 350 watts, but only 4 amps, a Chinese typo? The second motor, the 24v one was used in a 4mph mobility scooter.

However, the confusing thing is that the 'theoretically' more powerful motor, the 12v one is about 10-15% smaller in physical size.

I want to use the more powerful one, but which one do i believe?

John]]> jomac Stepper Motors, Servo Motors, DC Motors Tue, 01 Dec 2015 11:39:01 -0500