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How Does My Car Starter Work
August 17th, 2020
Your car starter works like any electric motor. There are fixed magnets with opposite poles on either side of the framework. The framework acts as an electromagnet. It has two plates one on each side called commutators.
The commutators accept a charge from the battery through steel brushes or fixed copper that touch them. This action turns the framework into a two-pole magnet. Each pole of the framework is repelled by its identical-pole fixed magnet and attracted by the opposite pole magnet.
The side of the framework with the positive charged commutator will spin toward the north magnet and the side of the armature with the negatively charged commutator will spin toward the south magnet. The brushes taking the charge to the commutators keep it from sticking. After the framework flips over, the commutators will have switched position, putting them in contact with the opposite brushes.
They now have the opposite charge and are repelled by and attracted to the opposite pole from what they were before, so they have to flip over again. It continues until the starter stops receiving electricity from the battery.
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Auto Repair and Maintenance