Air Compressor Motor Selection & RPM Guide

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SUMMARY

To select an electric motor equivalent to an 11 horsepower gas engine for an air compressor, it is essential to consider both horsepower and RPM. Electric motors, particularly compressor duty motors, deliver more power at lower RPMs compared to gas engines. Recommended suppliers for these motors include Grainger, McMaster-Carr, and Northern Tool. Additionally, ensure that the electric motor can be connected to a 220V source, as it will require nearly 40 amps for operation.

PREREQUISITES
  • Understanding of electric motor specifications, including horsepower and RPM
  • Familiarity with compressor duty motors
  • Knowledge of electrical requirements for 220V systems
  • Basic understanding of air compressor functionality
NEXT STEPS
  • Research compressor duty motors available at Grainger, McMaster-Carr, and Northern Tool
  • Learn about the electrical requirements for connecting motors to a 220V source
  • Explore the differences in performance between electric and gas engines in air compressors
  • Investigate the implications of motor amperage on circuit design and safety
USEFUL FOR

Engineers, HVAC technicians, and anyone involved in selecting or upgrading air compressor systems will benefit from this discussion.

Bob Hill
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If I have an air compessor that uses an 11 horse power gas engine.
How do I know what size electric motor, and what RPM will do the same job?
 
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Can't you just match the horsepower and rpm to the one you have?
 
Electric motors are often sized in H.P. They do however provide much more power at lower rpm than do gas engines. I would suggest you look for a compressor duty motor. Try Grainger, Mcmaster Carr or Northern Tool. 11 h.p is pretty big for a home air compressor. Will you be able to connect it to a 220V source? Even at 220V you will need almost 40 amps.
 

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