Magnetic Pickup
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| Illustration 1 | g01344897 |
Schematic of Magnetic Pickup (1) Magnetic lines of force (2) Wire coils (3) Gap (4) Pole (5) Flywheel ring gear | |
The magnetic pickup is a permanent magnet generator with a single pole. The magnetic pickup is made of wire coils (2). The coils go around a permanent magnet pole piece (4) .
As the teeth of the flywheel ring gear (5) cut through the magnetic lines of force (1) around the pickup, an AC voltage is generated. The frequency of this voltage is directly proportional to engine speed.
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