## 6.3.1. Direct current generatorsThe induced voltage is determined by means of the equation U Thus we derive the value of U 1. through the construction (C) The construction constant (C) which results from the construction of the generator take in, for example, the number of pole pairs, the number of rotor conductors and the interconnection of the rotor windings. The exciter flow can be controlled by changing the exciter winding voltage. This is possible by series connection of an alterable resistance to the exciter winding. This is called resistance strain field actuator. Exciter voltage, exciter current and excited flow are interlinked like this:
If U
Figure 96 depicts the relationship between rotor speed and induced voltage U
The induced voltage of a direct current generator can be controlled by altering the exciter current or the speed. |

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