Rotor Speed Current Frequency ,Torque And Emf
slip:the slip is a ratio of synchronous rpm minus the actual rpm to the synchronous speed multipled by 100 which is relative to the synchronous speed
where s is the slop between 0 and 1
nr=rotor rotation speed
ns=synchronous rotation speed
Frequency of rotor current or emf: the rate of cutting flux by the rotor conductors is the major thing on which the frequency of rotor emf and rotor current depends. The frequency of the rotor induced emf is defined as the product of slip times the supply frequency in running conditions
Rotor current: the rotor current per phase is defined as the ratio of e2 to the z2
Rotor torque: the rotor developed by the rotor is directly proportional to the rotor current, rotor emf and power factor of the rotor circuit.
t is directly proportional to e2i2cosф
Rotor emf: the emf induced per phase in the rotor when it is at stand still ,the motor operated as the 3 phase transformer with secondary short circuited .
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