2500hp GE electric Motor (6RDS)

[ScottRomero]

I am looking for a cyclone type blower that reduces the moisture in the air before it discharges into the rotor end of a 2500hp electric motor, something that passes about 400cfm at about 1" to 2" H2O positive pressure.

The type that is on their now they no longer make. The reason it needs to be moisture free is because we need it to cool down the brush end of the motor (The rotor) if anyone can help, thanks in advance.

Scott Romero

 

[itsmoked]

I'm not much of a motor person but why do you need "dry" air for a running motor? Won't the motor always be far warmer than the dew point? Wouldn't moist non-condensing air be able to carry more heat away?

 

[ScottRomero]

The blower is for cooling the brush ring and ring assembly, so basically we have a rotorclone type blower attach to a piece of 4" pvc pipe ran out to over the outside of the platform.

That way, we can suck clean air without any debre and we also don't want to suck in any moisture, rain water or in this case high humidity moisture into the system because it would just blow it right into the brush ring and at 1kv on the rotor it could get ugly.

 

[jraef]

Although I'm not a fan of cross posting, you may want to post this in the HVAC/R forum. Even though what you are feeding to is an electric motor, this more of a mechanical issue than a control issue. HVAC/R guys would be beter at recommending a dehumidifier based on performance specs than we would I would think.

That said, make sure you don't dry the air too much! There needs to be a small amount of moisture in order for the brushes to work. brush moisture article link

"Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more."
Nikola Tesla

 

[aolalde]

Hello ScottRomero:

See if these links give you any help.

http://www.tech-help.com/electra_kool.htm

http://www.wayneproducts.com/

 

[petronila]

Hello Scott,

Why you have to install a forced air in slip ring end? is the motor not working proper? before you install a forced air I think is better to research about why you have high temperature. You could to check spring force in the brush holders, the brush material type and to test the winding.

Regards

PETRONILA

 

[ScottRomero]

This motor has been set up like that for 20 years. It is driving a gas compressor. It has a liquid stat system to control the speed of the motor witch in general controls the resistance of the rotor. The brushes are good for 100 amps and they are carbon. Each phase of the ring draws about 800 to 1000 amps that is where the heat is coming from plus the outside temp can get pretty high in the Gulf.

 

[petronila]

Hi Scott,

If you don´t have any trouble with the rotor´s motor perfomance I think is better you get contact with a AIR blowing Specialist to help you,because is not enough with all data you have, the skill technician most go to your company and then they are gonne have an analysis of all the application, including ducts and all you need.

Regards

PETRONILA