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Question

A dc generator is rated at 10 kW, 200 V, and 50 A when it rotates at $1000$ rpm. The resistance of the armature windings is $0.40 ~\Omega$. (a) Calculate the "no-load" voltage at $1000$ rpm (when there is no circuit hooked up to the generator). (b) Calculate the full-load voltage (i.e. at $50 ~\mathrm{A}$) when the generator is run at $800$ rpm. Assume that the magnitude of the magnetic field remains constant.

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Answered 2 years ago

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1 of 5**Given information:**

$\begin{aligned} P &= 10 \ \text{kW} = 10 000 \ \text{W} \\ V &= 200 \ \text{V} \\ I &= 50 \ \text{A} \\ \omega _1 &= 1000 \ \dfrac{\text{rad}}{\text{s}} \\ R &= 0.40 \ \Omega \\ \omega _2 &= 800 \ \dfrac{\text{rad}}{\text{s}} \end{aligned}$

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