Y slip ring use in a.c. dynamo wt is its advantages
Answers
Slip rings provide a means for connecting the rotating armature of a simple a.c. generator to an external circuit. As the armature naturally produces an alternating voltage, an alternating voltages appears across the slip rings. ...
Advantages
High Starting torque with low starting current. Maximum starting can be attained in the slip ring motor compared to squirrel cage motor by inserting an external resistance in each phase of the rotor circuit and cutting the resistance during starting
Speeds can be adjusted in the case of slip ring (wound rotor) induction motor by inserting an resistance. Hence slip ring motors are considered as variable speed motors.
Slip ring motors have high over loading capacity, smooth acceleration under heavy loads, and no abnormal heating during starting
Read more: http://electricalquestionsguide.blogspot.com/2011/12/slip-ring-induction-motor-advantages.html#ixzz5WZI3f1mX
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