Configuring motor to run off single phase?

-Matt · Oct 9, 2021

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

[ElectriciansForums.net] Configuring motor to run off single phase?

cliffed · Oct 9, 2021

Looks like delta connection on the nameplate which is 230v…

Strima · Oct 9, 2021

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.

telectrix · Oct 9, 2021

agreed. the 230V rating detail is not single phase.

-Matt · Oct 9, 2021

Strima said:
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 · Oct 9, 2021

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 · Oct 10, 2021

brianmoooore said:
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 · Oct 10, 2021

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.

-Matt · Oct 17, 2021

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!):

Victron Energy Quattro 48V 15000-200-100-100 Pure Sine Power Inverter Battery Charger - Low Energy Supermarket

Similar to the MultiPlus, this Quattro 48V 15000-200-100-100 is also a combined inverter and charger. Additionally it can accept two AC inputs and automatically connect to the active source. Its many features include a true sine wave inverter, adaptive charging, hybrid PowerAssist technology...

lowenergysupermarket.com

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

Victron Energy LiFePO4 Battery 25,6V 200Ah Smart-a - BAT524120610

BMS Technologies LTD are leading Victron Energy distributors offering free delivery throughout the UK. Free technical advice on all lithium smart batteries.

www.batterymegastore.co.uk

ElectroChem · Oct 20, 2021

-Matt said:
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!):

Victron Energy Quattro 48V 15000-200-100-100 Pure Sine Power Inverter Battery Charger - Low Energy Supermarket

Similar to the MultiPlus, this Quattro 48V 15000-200-100-100 is also a combined inverter and charger. Additionally it can accept two AC inputs and automatically connect to the active source. Its many features include a true sine wave inverter, adaptive charging, hybrid PowerAssist technology...

lowenergysupermarket.com

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

Victron Energy LiFePO4 Battery 25,6V 200Ah Smart-a - BAT524120610

BMS Technologies LTD are leading Victron Energy distributors offering free delivery throughout the UK. Free technical advice on all lithium smart batteries.

www.batterymegastore.co.uk

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?