Section 1
GENERATOR FUNDAMENTALS
A SIMPLE AC GENERATOR
Figure
As the MOTOR turns, its magnetic field cuts across the stationary STATOR. A voltage is induced into the STATOR windings. When the magnet's NORTH pole passes the STATOR, current flows in one direction. Current flows in the opposite direction when the mag- net's SOUTH pole passes the STATOR. This con- stant reversal of current flow results in an alternating current (AC) waveform that can be diagrammed as shown in Figure
The ROTOR may be a
1.The
2.The
CURRENTVOLTAGE
(+)
0 | 180 | 360 |
ONE CYCLE
Figure 1-5. – Alternating Current Sine Wave
A MORE SOPHISTICATED AC GENERATOR
Figure
STATOR
ROTOR
MAGNETIC FIELD
Figure 1-4. – A Simple AC Generator
OUTPUT |
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| 120 V | STATOR STATOR |
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| 240 V |
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AC | 120 V |
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CURRENT |
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| BRUSHES |
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DC |
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Figure 1-6. – A More Sophisticated Generator
See Figure
Page 4