What is the working principle and construction of synchronous motor?

 

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Q&A about Synchronous Motor

1. What is the working principle and construction of synchronous motor?

1. Working Principle: A synchronous motor is an AC motor in which the rotation of the rotor is synchronized with the frequency of the supply current. The stator creates a rotating magnetic field, which induces an AC voltage in the rotor. The rotor then locks onto the stator's magnetic field and rotates at the same speed. This synchronization between the magnetic fields of the stator and rotor allows the motor to maintain a constant speed, making it ideal for applications where precise speed control is required.2. Construction: A synchronous motor consists of two main parts - the stator and the rotor. The stator is the stationary part of the motor and is typically made up of a series of coils that produce a rotating magnetic field when an AC current is passed through them. The rotor, on the other hand, is the rotating part of the motor and is connected to the load that needs to be driven.Synchronous motors are often classified into two types based on the construction of the rotor - non-excited and excited. Non-excited synchronous motors have a rotor with permanent magnets that provide the magnetic field necessary for operation. Excited synchronous motors, on the other hand, have a rotor that is energized by DC current supplied through slip rings and brushes.In summary, the working principle of a synchronous motor involves the interaction of the rotating magnetic fields produced by the stator and rotor. The construction of a synchronous motor includes a stationary stator with coils and a rotating rotor connected to the load, with variations depending on whether it is a non-excited or excited type.

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