Questions and Answers
What is the purpose of the external resistances added to the rotor circuit at starting?
To obtain a high starting torque
How is the rotor winding of the wound rotor connected?
In star fashion
What happens to the external resistances as the motor runs up to speed?
They are gradually removed from the circuit
What is the role of the carbon brushes in the wound rotor?
Signup and view all the answers
How does the wound rotor operate once it attains normal speed?
Signup and view all the answers
What is the construction of the wound rotor?
Signup and view all the answers
How is the rotor winding of the wound rotor connected?
Signup and view all the answers
What can be added to the rotor circuit at starting to obtain high starting torque?
Signup and view all the answers
What is the function of the carbon brushes in the wound rotor?
Signup and view all the answers
How does the use of external resistances affect the starting current and starting torque of the motor?
Signup and view all the answers