220v electric motor connection

MisterBill2

Joined Jan 23, 2018
18,442
Ok I will wire it up like star connections to run single phase
It is not likely that a motor intended to operate from three phase power will perform adequately connected to single phase power. Star configuration connection to single phase power will not deliver the rated performance .
The connections shown are for connecting a three-phase motor to three phase power.
 

Reloadron

Joined Jan 15, 2015
7,512
You have a 220 Volt 3 Phase motor. You can have 3 phase delta or 3 phase Y but it is a 3 phase motor so unless you have a 3 phase 240 VAC 60 Hz generator or other 3 phase source you can't hook it up to run. I see MrBill was quicker than I with that. :)

Ron
 

MaxHeadRoom

Joined Jul 18, 2013
28,669
Also one motor must run clockwise and the other counter clockwise. Is it possible to only use one digital phase converter?
You can use 2 Identical motors on a VFD, I have done it in the past, but the performance requirement and command has to be identical, ideally.
If under ~5HP total, you can use 1ph supply.
 

MisterBill2

Joined Jan 23, 2018
18,442
Do not expect anything like the rated motor performance when using the scheme shown in post #10, if the motor runs at all.
Actual 3-phase power is not like a somewhat phase shifted second phase, Also, the capacitor value will depend on the motor size and rating. In addition, the capacitor will have to be motor-running current rated.
 

MaxHeadRoom

Joined Jul 18, 2013
28,669
Do not expect anything like the rated motor performance when using the scheme shown in post #10, if the motor runs at all.
Actual 3-phase power is not like a somewhat phase shifted second phase, Also, the capacitor value will depend on the motor size and rating. In addition, the capacitor will have to be motor-running current rated.
Although it does roughly simulate the method used in RPC (Rotary phase convertors) I built one and used it for a few years to run my 3ph Excello mill spindle before eventually replacing with VFD.
https://www.northamericaphaseconverters.com/phase-converters/
 

MaxHeadRoom

Joined Jul 18, 2013
28,669
I have seen 'scope readings which show a 3ph signal that is impossible to tell the difference between the two.
In any case, it did the job well and as could be expected.
I suspect the eventual availability of cheaper VFD's was the cause of its demise.
 
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