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How to properly operate a three-phase motor using single-phase power

Plant Engineering
Publication date: 
October 2016
Chuck Yung, EASA Senior Technical Support Specialist

There are several methods to operating a three-phase motor using single-phase power to make what would be an otherwise expensive and arduous process a little easier

So, you told a neighbor you work with electrical equipment and now he thinks you can solve his problem because he or she bought a three-phase motor that can't run on single-phase power. Being asked to convert this motor already sounds like more trouble than it's worth. That's not quite true though. There are some methods to make the process easier.

These methods include:

  • The phantom leg method
  • Rotary phase converter method
  • Variable frequency drive method