Thread: How do you slow down an electric motor?

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Originally Posted by pat mccarthy

AC 3 phase motor i think 4 hp 1750 rpm step down about 450 rpm .the frequency drive is a baldor key pad and has a rpm read out with a speed dail on the machine . can get the numbers if needed .thanks

If you are running a 1750 rpm motor at 450 rpm, that is 26% of its rated speed, and you are probably having torque issues.

Baldor is a good name in inverters, I have had a lot of luck with them in the past. Dig out the manual, and see if there are some parameters you can adjust to improve the torque at low speed.

If you can give me the model #, I might be able to tell you which parameter(s) to adjust.