Electrical - A/C & D/C - Convert 3 phase motor to single phase

Does anyone know if there is a simple way to convert a 5hp 3 phase motor to run on single phase 240? Is the amp rating of the motor affected by the conversion? TIA for any info.

I believe the only thing you can do is obtain another motor or get a device called a Rotophase. See link.

http://www.rotophase.com/

Thanks - looks like it may be an answer. They also mention static phase converters as a competitive product.

Ronk Electrical Industries makes both rotary and static. In my experience the static model is preferred for general purpose motors. We'd be talking about a 5HP/4S model, which takes 240 volt single phase in and gives you 480v/3 phase output. List price is $661 though, which could buy you a bunch of 5HP single phase motors!

Good luck.

Juice

Roto-phases must be sized by the largest motor loaded on the output of the generated converter. Then you can put several motors on that same Roto-phase without increasing the size of that phase convertor generator.

A static phase convertor is an electronic device sized for each individual motor.

Usually a static phase convertor is you most economic buy if only one motor is involved. However there are limitations you need to consider such as inrush demand involved. If this static phase convertor is powering say an air compressor that does not have a pressure relief and starts under heavy load it may knock out that satic convertor due to the heavy inrush of load. Something that you should research before you buy.

A company called Arco which was bought as a division of Kirby Risk in my home town has been manufacturing Roto-phases for decades. That might be another company to check with if you chose a Roto-phase.

In my opinion if it is only one motor a static phase convertor is most likely you best choice.

Good Luck


Wg