Lecture 5: Flux Linkage & Induced EMF in Rotor Coils in Induction Motors

Mistake Alert: Timestamp: 20:30 to 22:00 -- While explaining why H in PM is negative, I was supposed to apply Ampere's circuital law along the assumed loop. So, it is supposed to be
Hm lm + Hg lg = 0 which implies Hm = -(lg/li)Hg
where Hm, Hg : magnetic field intensity in PM and air-gap; lm, lg : lengths of the PM and air-gap.
By mistake I wrote, Hm Bm + Hg Bg = 0 which is incorrect.
This will be discussed at the beginning of the Lecture-8.
Thanks for pointing that out.
--------------------------------------------------------------------------------------------------------------------------------------------------

The video starts with responses to questions on MMF distribution due to distributed winding, the difference between salient-pole and cylindrical-rotor synchronous machines, and the torque density comparison between PMSMs and wound-rotor SMs.

Thereafter, flux linkage and induced EMF waveforms of the rotor coils are explained for cases where the stator is excited with 3-phase balanced sinusoidal currents (rotating magnetic field at 3000 rpm) and (i) the rotor is stationary, (ii) the rotor is rotated at 2400 rpm.

This leads to the realization of singly excited cage rotor Induction Motors, apart from the doubly fed Induction Machines.

Видео Lecture 5: Flux Linkage & Induced EMF in Rotor Coils in Induction Motors канала SAMRAT DAS