Generator Conversion

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augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Need help figuring out how to get 3 phase from single phase genset.

There is no direct method. You could use your gen to power an inversion device such as a roto-phase, some drives or a motor-generator set but in most cases it is impractical.
 

junkhound

Senior Member
Location
Renton, WA
Occupation
EE, power electronics specialty
3 phase from single phase genset

Easiest way is to use the single phase output as the input to a 3 phase motor drive inverter.

You can also strip the winding out of the single phase generator and rewind in a 3 phase configuration, but likely not worth that effort as cheap as inverters are becoming.
 

stevekibbe

Member
Location
AZ
Single phase

Single phase

Thank you all for the replies. The gen is a Cat 75KW G75F1S. To replace would be around $35K. It
appears a rot-phase would cost more than a new gen end. It's powering a 75HP compressor and several
small pumps. Looks like most economical way is to replace gen end to 3 phase.
 

eHunter

Senior Member
Thank you all for the replies. The gen is a Cat 75KW G75F1S. To replace would be around $35K. It
appears a rot-phase would cost more than a new gen end. It's powering a 75HP compressor and several
small pumps. Looks like most economical way is to replace gen end to 3 phase.


Being a CAT product is encouraging although it is most likely an Olympian.
Have you contacted CAT about reconfiguring? You will have to provide them the exact model & serial number and they can peovide you with info concerning that particular unit configuration when it was manufactured.
Without the serial number I cannot ascertain the config when manufactured.
Do you know the generator head model number?
Do you know how may winding leads the generator has? If there are 9 or 12 winding leads, it can most likely be reconfigured for 3-phase. but will require additional changes and controller programming.
 
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