Window Motor question

[kevin.li.rit]

Originally Posted by ipburbank

Sorry for the poor wording of that question the first time, What I mean to ask is: a second motor wouldn't decrease the duty cycle, and I wonder if the difference in load would be enough to decrease the heat generated. From previous discussion the 7-8 amps isn't an enormous load indication, therefore even half that with the long duty cycles might not make much of a difference?

The heat generated in total would be cut down as you are running the motors more efficiently. With two motors ( and based on your current measurements) you'd be running a at close to 80% efficiency, with a single motor you'd be running closer to 60% efficiency. You'd also have twice the surface area to dissipate less than half the excess heat.

I don't have too much experience running these window motors to know under what loads the PTC likes to trip.

Edit: I've been reading the RPMs as %efficiency... so my figures for efficiency are off...