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E1171 Pages: 2

By conducting Open Circuit and Short Circuit tests derive the equivalent circuit
of a single phase transformer
What are the losses present in a single phase transformer
By conducting no load and blocked rotor test write the procedure to draw the
circle diagram of a three phase induction motor
What is the significance of the term slip of an induction motor
Explain how rotating magnetic field is produced in a three phase induction
motor. Also prove that its magnitude of resultant flux is constant at different
angles.
PART C

Answer any four full questions, each carries 10 marks.
Explain how regulation of alternator is conducted by EMF Method
What is a synchronous condenser
Explain the V curves of a synchronous motor
What are the methods of starting synchronous motors
Explain double field revolving theory of a single phase induction motor
Explain with diagram the Working of a capacitor start induction motor
What are the applications of capacitor start induction motors
Explain with diagram the working of a multi stack variable reluctance stepper
motor
Explain the principle of operation of a stepper motor
Explain the with block diagram the working of open loop and closed loop
control of a stepper motor
What are the applications of stepper motors
What are the applications of programmable logic controller
Explain the working of a digital controller used for Automation
Explain the applications of axis controller and machine tool controller in

Industrial Automation

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