how to convert 3-phase motor to single phase motor?
how to convert 3-phase motor to single phase motor?
(OP)
I have a 3-phase motor (1.5 HP, 400V)and wnt to operate it using a single phase source (220V). if i was to use the capacitor for this converstion how can i determine the capacitance.





RE: how to convert 3-phase motor to single phase motor?
You can't just use a capacitor alone - needs a few other bits too. If it were my motor, I would buy one of the low-end inverters which are now quite inexpensive - you should get one for under £150 if you shop around a bit.
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RE: how to convert 3-phase motor to single phase motor?
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RE: how to convert 3-phase motor to single phase motor?
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Start each day with a smile. Get it over with.
RE: how to convert 3-phase motor to single phase motor?
RE: how to convert 3-phase motor to single phase motor?
If you use an inverter then you want the supply voltage to be equal or more than the motor voltage. Equal is better.
RE: how to convert 3-phase motor to single phase motor?
Most motors of that size tend to be 400V star / 230V delta, at least in Europe which is where I'm guessing this motor is from based on the rated voltage. 400V delta / 690V star motors do exist in such small sizes but are much less common. Assuming that the motor isn't one of that minority it is usually reasonably simple to reconnect the windings in delta. Even if minor surgery is required to split the star point if it is internal in order to bring bring out all six leads, it is not especially difficult.
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RE: how to convert 3-phase motor to single phase motor?