The working principle of the brushless alternator is to provide excitation to the exciting winding of the exciter on the stator. The rotor armature winding will emit AC power. After rectification, the rotor will supply power to the exciting winding of the main generator in the rotor, so that the main generator The armature winding on the stator induces the required alternating current. This is the "brushless" working principle of general alternators.
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