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Electrical Machines
For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load?
4575.4 r.p.m.
1037.5 r.p.m.
1130 r.p.m.
none of above.
4575.4 r.p.m.
1037.5 r.p.m.
1130 r.p.m.
none of above.
Answer
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The output power of a dc motor is given by
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In a 3 - φ induction motor running at full load which of these parameters is stationary with respect to the stator mmf wave?
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Which type of motors uses slip rings?
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Answer
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