True, but the trick would be doing the reversing when the negative side
is the motor case bolted to the inner fender.
> About 5 Yorks ago there was a poor guy walking around the corral with a motor
> in his hands, brand new, he had just paid $65 for it.
[quoted text clipped - 7 lines]
> http://bondobilly.com/#stuff
> TAKE A LOOK AT THE NEW SHIRTS.....THEY ARE NEAT

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Joel - 24 Oct 2004 02:42 GMT
Yes, but only permanent magnet type DC motors can be reversed by
reversing polarity to the motor.
Joel
> True, but the trick would be doing the reversing when the negative side
> is the motor case bolted to the inner fender.
[quoted text clipped - 13 lines]
>> http://bondobilly.com/#stuff
>> TAKE A LOOK AT THE NEW SHIRTS.....THEY ARE NEAT
Gordon Richmond - 28 Oct 2004 07:43 GMT
You can reverse a series-wound DC motor, like the heater motors, by
reversing the connections to the brushes OR to the field. One or the
other other, not both.
The construction of the individual motor usually dictates which
reversal is easiest to perform.
This is why series-wound motors run on AC as well as on DC. Their
direction of rotation is determined by the relationship between the
magnetic poles of the field vs the armature, and not by the direction
of current flow.
Gord Richmond
> About 5 Yorks ago there was a poor guy walking around the corral with a motor
> in his hands, brand new, he had just paid $65 for it.
[quoted text clipped - 5 lines]
> I do not know much about electronics, but a DC motor can be reversed by
> switching polarity right, so what was the panic?
Only certain motors reverse... For example, applying 12 volts to a six
volt starter motor still turns in the same direction.

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JT
Just tooling through cyberspace in my ancient G4
Joel - 24 Oct 2004 03:57 GMT
Yes, because unlike a pm motor the 6 volt starter motors use a stator
winding to produce the magnetic field that the armature spins in and
this field reverses when polarity is reversed,
Joel
>>About 5 Yorks ago there was a poor guy walking around the corral with a motor
>>in his hands, brand new, he had just paid $65 for it.
[quoted text clipped - 8 lines]
> Only certain motors reverse... For example, applying 12 volts to a six
> volt starter motor still turns in the same direction.
Grumpy au Contraire - 24 Oct 2004 04:57 GMT
Joel,
I'm going to try and copy the '31 Chassis/Body Parts book next week.
JT
> Yes, because unlike a pm motor the 6 volt starter motors use a stator
> winding to produce the magnetic field that the armature spins in and
[quoted text clipped - 14 lines]
> > Only certain motors reverse... For example, applying 12 volts to a six
> > volt starter motor still turns in the same direction.
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