When operated from a 230-V dc supply, a dc series motor operates at 975 r/min with a
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When operated from a 230-V dc supply, a dc series motor operates at 975 r/min with a line current of 90 A. Its armature-circuit resistance is 0.11Ω and its series-field resistance is 0.08Ω. Due to saturation effects, the flux produced by an armature current of 30 A is 48 percent of that at an armature current of 90 A. Find the motor speed when the armature voltage is 230 V and the armature current is 30 A.
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From the given data the generated voltage at Ia 90A and n90 975 ...View the full answer
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