If I currently have a mixer that has a one hp motor inputting 3300 rpm to a gear reducer to obtain 800 RPM output, then if I was to remove the motor and reducer to put a VFD driven 1750 motor direct drive to my mixer what size HP motor would be required. If you know please can you also provide the formula.
Have an insight or suggestion?
Login or register to post a comment.
Dave Dickey Forum Moderator 298 Posts
Re: HP Motor Size Requirements2 April 2008 at 1:29pmThe motor size question does not require a formula, you simply need the same horsepower motor. The speed-reduction drive is a constant horsepower device: horsepower "in" equals horsepower "out," minus some small losses of typically 2% to 5%. To drive your mixer at the same speed, 800 rpm, with the same torque, you need the same power. Under normal conditions, an equal-size electric motor designed for use with a VFD, should deliver the amount of power your mixer needs.