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About cleggsan
Expertise
All technical areas of Electronics Engineering.

Experience
BSEE, MBA, Design, R&D, University Research.
Senior Life Member of IEEE. Life Fellow of AES.

Organizations
IEEE, Consumer Electronics Society, Audio Engineering Society.
Broad teaching experience; work experience mostly in consumer electronics and conversion from analog to digital technologies. Pioneer in digital audio at all levels.

You are here: Experts > Computing/Technology > Job Searching: Technical > Electrical Engineering > three phase convertion

Electrical Engineering - three phase convertion

Expert: cleggsan - 11/9/2009

Question
I have printing machine which required three power supply 5 HP, I have learned that i can made a converter using three phase motor and capacitor so that i can use the machine in single phase power supply

can you please give a electrical diagram for the converter and the computation of capacitor I need will use

thanks in advance

Answer
From everything I have learned it is a better solution to just replace the motor with a new single phase than to convert the 3 phase:

http://wiki.answers.com/Q/How_do_you_convert_or_rewire_a_5hp_3_phase_motor_to_si...

The problem with converting is you have to have a starting function. It is not a standard cook-book procedure because it depends on the load on the shaft of the motor and the windings of the specific motor. In other words it is a trial and error engineering task.

If you would like to convert the single phase power to 3-phase there are many methods of doing that. Here is one example to study:

http://www.metalwebnews.com/howto/ph-conv/ph-conv.html

Discussion:

http://www.electro-tech-online.com/electronic-projects-design-ideas-reviews/2709...

http://forum.doityourself.com/archive/index.php/t-71649.html

http://en.allexperts.com/q/Electric-Motors-3782/2009/9/3-phase-motor-2.htm

I hope this discourages you from wanting to convert and to make the decision to replace the motor with a single phase unit!

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