Re: DC Motor/Generator help - where to go
- From: Mark Rand <randm@xxxxxxxxxxxxxxxxx>
- Date: Thu, 08 Jun 2006 20:22:42 +0100
On Wed, 7 Jun 2006 22:05:30 +0100, "Steve Richardson" <oldnoccer at
btinternet.com> wrote:
Worth just checking that the brushes are free in their holders before
you start paying for help.
Cheers
Tim
Tim,
I didn't even need to go as deep as the brushes. I thought the 4 wires
passed under a plate and into the generator, but I found that under the
plate was a 4 way terminal block and two of the wires were out. I now find I
have 358 ohms on one circuit and 2.3 ohms on the other - which is at least
continuity. I think the higher resistance is the rotor as it seems to change
as I rotate it. The other would then be the field coil resistance.
The two windings on the DC motor are 130 ohms and 5 ohms.
So maybe things are not so bad after all !! Though the rubber coated
insulation on the leads still will need changing. So a strip down is still
required, but it may mean an expensive rewind is no longer required.
Steve
If it's shunt wound, the higher resistance will be the field. What you may be
seeing is a false reading caused by voltages being induced in the field
winding by some residual magnetism in the rotor.
regards
Mark Rand
RTFM
.
- References:
- DC Motor/Generator help - where to go
- From: Steve Richardson
- Re: DC Motor/Generator help - where to go
- From: Steve Richardson
- DC Motor/Generator help - where to go
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