Explain how the power flows in an induction machine, where losses occur and how they can be calculated, along with typical percentage values that you would expect to observe.
a) Explain how the power flows in an induction machine, where losses occur and how they can be calculated, along with typical percentage values that you would expect to observe.
b) Briefly explain the differences between synchronous motors and induction motors. You should describe the construction and operation of each motor, and how power is distributed to the rotor.
c) A 415V star-connected synchronous induction motor has a stator resistance of 0.5ohms per phase and a combined rotor and exciter resistance of 2 ohms. On no-load and with unity power factor, the motor draws a line current of 5 amperes.If the excitation current is 10 amperes under no-load unity power factor conditions and 20 amperes under load condition, what is the efficiency of the motor when the line supply current is 100 amperes?
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