(a) Calculate the \"no-load\" voltage at 1000 rpm (when there is no circuit hook

Question

(a) Calculate the "no-load" voltage at 1000 rpm (when there is no circuit hooked up to the generator).

__________________________ V

(b) Calculate the full-load voltage (i.e. at 50 A) when the generator is run at 800 rpm.

__________________________ V

A dc generator is rated at 10 kW, 220 V, and 50 A when it rotates at 1000 rpm. The resistance of the armature windings is 0.42 ohm . Assume that the magnitude of the magnetic field remains constant. (a) Calculate the ''no-load'' voltage at 1000 rpm (when there is no circuit hooked up to the generator). __________________________ V (b) Calculate the full-load voltage (i.e. at 50 A) when the generator is run at 800 rpm. __________________________ V

Explanation / Answer

(a)

E = 220 V

(b)

E = (800/1000)*220

= 176 V

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