Page 241 - Electrical Equipment Handbook _ Troubleshooting and Maintenance
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SYNCHRONOUS GENERATORS
12.4 CHAPTER TWELVE
FIGURE 12.3 A brushless exciter circuit. A small three-phase current is rectified and used to
supply the field circuit of the exciter, which is located on the stator. The output of the armature circuit
of the exciter (on the rotor) is then rectified and used to supply the field current of the main machine.
FIGURE 12.4 Photograph of a synchronous machine rotor with a brushless
exciter mounted on the same shaft. Notice the rectifying electronics visible
next to the armature of the exciter.
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