A three-phase induction motor is supplied with power from a 60-Hz source. At full load the motor speed is 1728 rpm, and at no load the speed is nearly 1800 rpm. At full-load conditions, determine the following: 1. speed of rotor field wih respect to the rotor 2. speed of rotor field with respect to the stator 3. speed of rotor field with respect to the stator field

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A: a) Rotating Magnetic Field When a three-phase supply is applied to a three-phase distributed…

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A: The given data is shown below:

Q: A 3-phase, 60 Hz induction motor has 2 poles. If the slip is 2% at a certain load, determine  the…

A:

Q: A 3-phase, 60 Hz induction motor has 2 poles. If the slip is 2% at a certain load, determine  the…

A:

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.