metalmagpie
Titanium
- Joined
- May 22, 2006
- Location
- Seattle
I know some of you are very knowledgeable about motors. I'm hoping one of you can answer this question off the top of your head. I'm going through a later Century R-I motor. It's got lots of filth and spider webs inside, like usual. It's probably 80 years old. Anyway, it is a 4-pole motor and has 4 brushes. I'm no expert, but I watched several long videos about tearing into such motors and in each case the brushes were independent. Yet on mine, there are two pairs shunted together with wire.
They are wedge-shaped brushes with the sides partly copper clad, although the copper has worn through in several spots. They look a lot like these:
Redirecting to https://store.eurtonelectric.com/brushesfloorequipment196a-1-1-1-2-5.aspx
The motor ran at the seller's house, so it doesn't seem to be a problem. But I want to understand why one repulsion/induction motor has independent brushes and another has two pairs of shunted brushes.
metalmagpie
They are wedge-shaped brushes with the sides partly copper clad, although the copper has worn through in several spots. They look a lot like these:
Redirecting to https://store.eurtonelectric.com/brushesfloorequipment196a-1-1-1-2-5.aspx
The motor ran at the seller's house, so it doesn't seem to be a problem. But I want to understand why one repulsion/induction motor has independent brushes and another has two pairs of shunted brushes.
metalmagpie