Can i convert supply voltage is 120v ac/ 60 Hz thrugh VFD

[manojdhapola]

hi all
manoj here .
I need help .. i have one application i want to run compressor it's supply voltage is 120v ac/ 60 Hz. can i convert this supply thrugh VFD {Power Flex 4 or 40} Allen Bradely make drive .



Waiting for your risponce.
Manoj Kumar Dhapola.

 

[Steve Etter]

Yes, you can buy a 120VAC PowerFlex 4 drive. I recommend contacting you AB rep.

Steve

 

[srehmanakhtar]

How is it possible to convert supply through frequency drive? You can not convert supply by using frequency drives.

 

[leitmotif]

Hmmm 120 VAC line and 120 VAC motor are the facts given.

IF the motor is a 120 VAC 3 phase then a 120 VAC VFD will work.

IF motor is a single phase it will not work well for variable speed. More than likely will do just fine at 60 Hz or 50 Hz whichever is its design frequency. Poor results at any other frequency due to changing inductive or capacitive reactance at other frequencies.

Dan Bentler

 

[Adam303]

IF the motor is a 120 VAC 3 phase then a 120 VAC VFD will work

I never hear of 120 volts 3 phase

 

[Ken Roach]

Manoj, you need to clarify if your compressor uses a single-phase motor or a three-phase motor.

Virtually all industrial variable frequency drives are built for three-phase output, but the input for various models have be three-phase, one-phase, or DC bus supply.

 

[OkiePC]

We have a bunch of power freezer doors using AB160 series single phase drives (I think they're 230V single phase), and another brand I don't recall with a 120VAC single phase input and IIRC a fractional HP 208VAC 3 phase motor connected...works pretty good too, actually, I think we lost one HIM module in five years and one or two motors among these 6 or 8 doors with single phase input 3 phase output VFDs.

 

[JeffKiper]

i built a few training stations and used 120 VAC. This system had a Baldor drive that would give me 230 VAC 3 Phase out from the 120 single phase input.

 

[manojdhapola]

Dear all thanks for discussing this matter. Actually motors specification are given below:-
Input Voltage-100-140v AC
Phase- Single phase input
Main phase winding resistance- 5.7-6.3 Ohm
Aux. winding resistance-12.16-13.44 Ohm
Full load current- 1.3 Ampere

It's Just Refrizrator's compressor motor.



Thanks and Regards
Manoj Kumar Dhapola
INDIA

 

[leitmotif]

Dear all thanks for discussing this matter. Actually motors specification are given below:-
Input Voltage-100-140v AC
Phase- Single phase input
Main phase winding resistance- 5.7-6.3 Ohm
Aux. winding resistance-12.16-13.44 Ohm
Full load current- 1.3 Ampere

It's Just Refrizrator's compressor motor.

Thanks and Regards Manoj Kumar Dhapola INDIA

Since this is a single phase motor I do not recommend trying to run off a VFD. Reasons
VFD wants balanced loading on each of 3 phases. Single motor would not give balanced load.

Motor is "impedance matched" for a single frequency. Outside of this frequency your impedances will get all wrong and you may or quite likely will burn out motor

Freon flow actually helps cool the motor / compressor. Volume is proportional to cooling which is proportional to speed. Low speed results in lowered cooling.
Dan Bentler

 

[2rlp]

Hi Manoj,

You have not mentioned the need to convert to 110/120V AC. Is it becos the voltage here in India is 230V AC?

Ron

 

[bce123]

transformer? is it 50 or 60 hz incomming?