Re: Charging a battery backwards

Posted by Nat 2 on July 06, 2007 at 10:53:11 from (64.80.108.53):

In Reply to: Charging a battery backwards posted by marvin johnson on July 06, 2007 at 10:37:39:

Oh, you probably did some minor damage to the battery, but nothing serious, unless the battery's been drawn down to zero many times before.

The starter is a DC motor, but it is shunt wound, meaning that instead of one set of windings and a set of permanent magnets, there are two sets of windings (one fixed, one rotating) connected in series. Because reversing the polarity reverses the polarity in both sets of windings, the motor turns the same way no matter what.

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