Understanding Rotor RMF in Squirrel Cage & Slip Ring Induction Motors

AI Thread Summary
The discussion centers on the presence of rotor rotating magnetic field (R-RMF) in squirrel cage induction motors (SCIM) compared to slip ring induction motors (SRIM). In SRIM, the three-phase supply to the stator generates an RMF that induces current in the rotor winding, creating its own RMF that is stationary relative to the stator. In contrast, SCIM relies on short-circuited rotor bars and end rings, which do not have a three-phase winding, raising questions about how R-RMF is generated in this design. While both motor types operate on similar principles, the mechanisms of RMF generation differ significantly. Understanding these differences is crucial for grasping the operational characteristics of each motor type.
nik235
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is the rotor rotating magnetic field(R-RMF) present in squirrel cage induction motor (SCIM).

Is it same as in 3 phase ROTOR winding of slip ring induction motor (SRIM), generating rotor RMF.

* THE 3 phase, supply given to stator 3 phase winding of SRIM, generates (RMF), which cuts the rotor 3 phase winding of SRIM, now this flux cutting action results in emf induction and thus current flow in 3 phase rotor winding of SRIM, due to current, the rotor winding generates its own RMF, this RMF is stationery with respect to stator RMF, thus torque production.

so now, is the above described pattern same in SCIM too, if yes, then how is ROTOR RMF generated, with just rotor bars short circuited with end rings (ie in absence of 3 phase rotor winding).
 
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