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Hi-Power Wind Turbine, Delco Farm Lights Windy Cousin


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  #1  
Old 03-07-2013, 03:16:47 PM
westtexas86004 westtexas86004 is offline
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Question Hi-Power Wind Turbine, Delco Farm Lights Windy Cousin

Hello,

My name is David and I recently acquired a Hi-Power Wind Turbine. This wind turbine was made by Delco Farm Light for part of 1938 so there are not many examples to be found.

This turbine was originally wired for 1KW at 32vdc, however the windings were fried in the example that I purchased and I had the fields and armature rewound.

I had the generator rewound for 48vdc @ 1KW and I am now in the process of rebuilding the brush assembly. This is where I am hoping some of the Delco Farm Light owners can assist me.

This generator uses an odd brush arrangement. Normally brushes are positioned at 180* to each other, but in this instance the brushes are set at 90* to each other. Is this normal for Delco Generators from that time period or is this peculiar to the wind turbine generator only?

I would also like to know if anyone knows of a source for brushes and brush spring clips for this generator?

Thanks, David






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Old 03-07-2013, 08:43:34 PM
Radiomike Radiomike is offline
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Default Re: Hi-Power Wind Turbine, Delco Farm Lights Windy Cousin

I don't know about Delco generators but, if you have a four pole, which you have from the photograph; then having two brushes 180° electrical apart - 90° mechanical- indicates the winding is a wave winding not a lap winding.

In a lap winding the connection from each commutator segment to the winding goes to the armature slots completes the number of turns and comes back to the adjacent segment. In a wave winding the start and finish of the winding are opposite on the commutator. Only two brushes are needed on a wave winding, more can be fitted if current density is a problem.

As for the brush gear there are guidelines on brush pressure per unit area related to the brush grade. However, the pressure is usually in the 18 - 22 kN/m˛ range for carbon brushes. Metallic brushes will be different.

Mike
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Old 03-26-2013, 11:45:39 AM
westtexas86004 westtexas86004 is offline
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Default Re: Hi-Power Wind Turbine, Delco Farm Lights Windy Cousin

Quote:
Originally Posted by Radiomike View Post
. . . having two brushes 180° electrical apart - 90° mechanical- indicates the winding is a wave winding . . . In a wave winding the start and finish of the winding are opposite on the commutator. Only two brushes are needed on a wave winding, more can be fitted if current density is a problem.

As for the brush gear there are guidelines on brush pressure per unit area related to the brush grade. However, the pressure is usually in the 18 - 22 kN/m˛ range for carbon brushes. Metallic brushes will be different.

Mike
Hi Mike,

Very good information. Much obliged.

Dave
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Old 03-26-2013, 01:25:27 PM
Power Power is offline
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Default Re: Hi-Power Wind Turbine, Delco Farm Lights Windy Cousin

I would also like to know if anyone knows of a source for brushes and brush spring clips for this generator?

Any large electric motor repair shop should be able to provide appropriate springs and carbon brushes with similar characteristics. Bring old ones with you.

I often have shop match up brushes/springs for me
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