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-Matt

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We have got a hydraulic motor/powerpack for leveling legs of a trailer. However this trailer is running off a 15KW inverter, so the motor needs to run off single phase.

The motor has come configured for 3 phase, however the motor plate does say it will run off single phase.

Would i be right in thinking it would need 2 capacitors? (start and run), and then the busbar's between W1+V1, V2+U2?
With capacitor's between U1+W2, and U2+W2?

Cheers

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-Matt

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Easiest option is to run it through a VFD. It will not run from single phase, the 230V is for running in Delta which is 230 volts per phase.

I have a smaller version of that motor for running a lathe, not a bad make.

Thanks, will see if it can be exchanged for a single phase motor.
 

brianmoooore

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I have a hydraulic four post car ramp in my workshop with a 2kW 3 phase motor, and have run it faultlessly off of a 230V single phase supply for the 20 years or so that I've had it.
I configured the motor from star to delta, added a permanently connected 'run' capacitor, and a 'start' capacitor, switched by a current operated relay.
 

telectrix

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I have a hydraulic four post car ramp in my workshop with a 2kW 3 phase motor, and have run it faultlessly off of a 230V single phase supply for the 20 years or so that I've had it.
I configured the motor from star to delta, added a permanently connected 'run' capacitor, and a 'start' capacitor, switched by a current operated relay.
and i always used to think that a 4 post ramp needed a phase each for 3 of the posts and a neutral for the 4th post. each post having the appropriate wrap of tape around it, red,yellow,blue, black. they then go up with a 120 deg. separation, wobbles the car somewhat, finds the suspension squeaks. ???
 

Darkwood

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To note here using an inverter to run single to 3ph and swapping the motor configurations will draw about 15+ amps off the supply, take that into consideration and size your mcb as stated in the drive instructions.
 
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-Matt

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So the hydraulic manufacturer is going to send over a single phase 3KW motor the replace the 3PH one, however its rated current is 17.75A which isn't ideal, but its only used for set-up.

Is there going to be any issues with using a motor off an inverter? (have never done it), with the start up currents of the motor?

This is the inverter (its ----ing heavy!):

And 4 of these: (in 2 banks of 2)
 

ElectroChem

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So the hydraulic manufacturer is going to send over a single phase 3KW motor the replace the 3PH one, however its rated current is 17.75A which isn't ideal, but its only used for set-up.

Is there going to be any issues with using a motor off an inverter? (have never done it), with the start up currents of the motor?

This is the inverter (its ----ing heavy!):

And 4 of these: (in 2 banks of 2)

I am puzzled by this.

You're using £20,000 worth of battery banks and inverters, but can't spring the few hundred quid for a 1-3 VSD to smoothly run the original motor?

Priorities much?
 

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