Introduction to AC:Direct Current ( DC ) Generator

Direct Current ( DC ) Generator

The basic difference between the AC generator and the DC generator is the way the generated EMF and current are extracted from the rotating coil, which cuts the magnetic field. In the case of the AC generator the induced EMF is extracted via fixed carbon brushes in contact with the rotating slip rings. In the case of the DC generator, the induced EMF is extracted via fixed carbon brushes in contact with the rotating commutator, as shown in Figure 18. A simple DC generator as shown, has a single loop coil with its ends connected to two copper segments forming its commutator which is mounted on a shaft.

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