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Components and Construction
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Construction
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| 4. |
Rectifier
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| (1) |
The rectifier performs full-wave rectification to convert the three-phase alternating current generated in the stator coils into direct current using six diodes (or eight diodes on alternators using neutral-point diodes). |
| (2) |
The rectifier consists of an output terminal, holder fin (heat-sink) and diodes. The two-layer construction of the holder fin improves heat radiation and allows for a compact rectifier. |
HINT:
The diodes used for rectification produce heat as the current passes through them. However, because the elements of the diode itself (semi-conductor material) are sensitive to heat, excessive heat build-up will cause poor rectification and possible diode failure. Therefore, the holder fin (heat-sink) is required to provide a large surface area to absorb and release this heat. |
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(19)
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