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 11 and its series field resistance is 0 08 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

Question: 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

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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