A universal motor (ac-operated) has a 2-pole armature with 960 conductors. At a certain load the...
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A universal motor (ac-operated) has a 2-pole armature with 960 conductors. At a certain load the motor speed is 5000 rpm and the armature current is 4.6 Amps, the armature terminal voltage and input power are respectively 100 Volts and 300 Watts. Compute the following, assuming an armature resistance of 3.5 ohm. (i) Effective armature reactance. (ii) Maximum value of useful flux/pole. (8) A universal motor (ac-operated) has a 2-pole armature with 960 conductors. At a certain load the motor speed is 5000 rpm and the armature current is 4.6 Amps, the armature terminal voltage and input power are respectively 100 Volts and 300 Watts. Compute the following, assuming an armature resistance of 3.5 ohm. (i) Effective armature reactance. (ii) Maximum value of useful flux/pole. (8)
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