1. What is meant by the excitation current of an induction motor? Draw its phasor diagram with applied voltages as the reference phasor showing its components. Which is the larger component and why?
2. What is the difference between excitation current and no-load current?
3. Draw the phasor diagram of an induction motor showing applied voltage, magnetizing, coreloss, load current and the line current. Label each component.
4. Write the expression for the resistance in the circuit model, the loss in which is equivalent to the mechanical power developed.