How can you run a three phase motor on a single phase supply?

Answer 1

for countries in Europe and other world areas running a 50 Hz supply service. UK household AC power mains voltage is now 230V (previously it was 240V) 50 Hz. From a 415 volt 3-phase incoming supply you will get this voltage between any ONE line and the Neutral.

Between any two lines you will get 415V. DO NOT WIRE IT LIKE THIS!

So, if you wire the motor to any ONE line (and ONLY ONE) and Neutral you'll get the correct voltage.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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My advice would be to buy a proper transformer which can be connected to a 415V 3ph input and give 230V 1ph output at a current rating suitable for the motor and its purpose. I assume the questioner's installation is in a commercial premises because domestic supplies in the UK are 230V 1ph only - running a 3ph motor off that requires a suitable inverter.

Answer 2

Connect the 3 conductors of the power source to the 3 conductors of the motor turn the motor on for a brief moment to note the direction that it turns if the direction is reversed swap any 2 conductors. Try this: www.tdk.co.jp/tefe02/e9123_zrgt_mf.pdf

Answer 3

Really, you cannot do this. Either get three phase power, buy another motor, or you'll have to invest in a motor-generator set, likely more expensive than a different motor.

-Denny, Toronto

I disagree, Temco makes a phase converter

http://www.phaseconverter.com/

Mike V

You can also build your own with a couple of capacitors and a potiential relay. Google it for info.

Answer 4

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. If you do this work yourself, always turn off the power

at the breaker box/fuse panel BEFORE you attempt to do any work AND

always use an electrician's test meter having metal-tipped probes

(not a simple proximity voltage indicator)

to insure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

Answer 5

Yes. Simply connect the motor across any two of the lines. Make sure, however that the line-to-line voltage is the same as the rated voltage of the motor. The reverse does not apply. Do not connect a 3-phase motor to a single phase supply. Yes, and be aware of a possible "high" leg in your 3ph supply. Some pole transformer conections for 3ph have a high leg delta connection(wild-leg). For instance, 240v 3ph line to ground voltages could read 120v, 208v,120v for the 3 consectutive lines. Of course you want the outer two lines from your panel as the center line should be your "High" leg. For 3ph to 1ph, use a phase converter or build one yourself.

Answer 6

You cannot run a three-phase motor on a single-phase supply.

You can if you have 1phase to 3 phase inverter

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The physical internal windings between single phase and three phase motors makes this an impossibility That being said money can make anything happen. Depending on the amount of money you want to spend to make this happen there is a device on the market called a VFD ( Variable Frequency Drive). On the three phase input terminals you apply your single phase voltage. On the output terminals you connect your three phase motor. When run in this configuration there is an internal switch that has to be changed to let the VFD know that it should be looking for only two lines on the input to be hot. Other wise the VFD thinks that there is a line loss on the three phase input terminals and the unit will not start.

Answer 7

The physical internal windings of a three phase motors to operate on a single phase supply makes this an impossibility That being said money can make anything happen. Depending on the amount of money you want to spend to make this happen there is a device on the market called a VFD ( Variable Frequency Drive). On the three phase input terminals you apply your single phase voltage. On the output terminals you connect your three phase motor. When run in this configuration there is an internal switch that has to be changed to let the VFD know that it should be looking for only two lines on the input to be hot. Other wise the VFD thinks that there is a line loss on the three phase input terminals and the unit will not start. The VFD has to be sized to the current that you need for the three phase motor.

Answer 8

The physical internal windings between single phase and three phase motors makes this an impossibility That being said money can make anything happen. Depending on the amount of money you want to spend to make this happen there is a device on the market called a VFD ( Variable Frequency Drive). On the three phase input terminals you apply your single phase voltage. On the output terminals you connect your three phase motor. When run in this configuration there is an internal switch that has to be changed to let the VFD know that it should be looking for only two lines on the input to be hot. Other wise the VFD thinks that there is a line loss on the three phase input terminals and the unit will not start.

Answer 9

Use VFD to make 3 phase from single phase source.