The S-JS-S-JS7503 Stator is a type of synchronous motor. Let’s delve into its construction and working principles:

1. Construction of Synchronous Motor:
   • The stator core is made of thin silicon lamination, which is insulated with a surface coating to minimize eddy current and hysteresis losses.
   • Inside the stator, there are axial slots where a three-phase stator winding is placed.
   • The stator winding has a specific number of poles equal to the rotor poles.
   • The rotor in synchronous motors is typically of the salient pole type.
   • DC supply is provided to the rotor winding via slip-rings, exciting the rotor and creating electromagnetic poles.
   • Alternatively, some synchronous motors use permanent magnets in the rotor.
   • Overall, the construction of a synchronous motor resembles that of an alternator (AC generator)
2. Working of Synchronous Motor:
   • The stator is wound with the same number of poles as the rotor and is fed with three-phase AC supply.
   • The AC supply generates a rotating magnetic field in the stator.
   • The rotor winding is fed with DC supply, magnetizing the rotor.
   • Consider a two-pole synchronous machine:
     • When the stator poles rotate with synchronous speed, they interchange their position rapidly.
     • Initially, if the rotor position aligns N pole of the rotor with N pole of the stator, repulsion occurs, resulting in anticlockwise torque.
     • As the rotor catches up to synchronous speed, the poles align, and attraction produces clockwise torque.
     • The rotor undergoes rapidly reversing torque until it reaches synchronous speed.
     • Once synchronized, the rotor experiences unidirectional torque and rotates at synchronous speed.

In summary, the S-JS-S-JS7503 Stator operates as a synchronous motor, converting electrical energy into mechanical motion. Its construction and working principles align with those of an alternator, making it a versatile component in various applications.

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