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  • Users: wment
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  1. wment

    Electric motor RPM vrs Load

    Thanks for all the good suggestions. The compressor is rated for a 5 to 7.5 hp motor so I dont think I can run the compressor too fast with the 3hp motor. I will check the rpm and current draw under load and increase the diameter of the motor pully while trying to keep the rpm close to 3450 and...
  2. wment

    Electric motor RPM vrs Load

    I replaced a 1725 rpm motor on a compressor with a 3hp 3450rpm 220vac single phase motor. I am trying to determine the pully size. I want to spin the compressor as fast as possible. As the load increases on the motor (larger pully) the rpm drops. What is the lowest RPM I can run the motor at...

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