Rotating Magnetic Field – 2

If φ_m is the maximum value of flux due to any one phase, then resultant flux in 2 phase and 3 phase AC machines would respectively be given by ______

If F₁ is the constant amplitude of fundamental rotating MMF wave, the for the space harmonics of order 6K-1 (where K=1,2,3….), the harmonic MMF wave is of _________

A 3 phase star connected winding is fed from symmetrical 3 phase supply with their neutrals connected together. If one of the 3 supply lines gets disconnected, then the revolving MMF wave will have a __________

Three phase voltages are applied to the three windings of an electrical machine. If any two supply terminals are interchanged, then the rotating MMF wave _______

What does the space angle α in the equation F_r(α,t)=3/2F_mcos(α-ωt) for MMF produced when 3-phase balanced windings excited by three phase balanced currents represent?

When a single-phase winding is excited by an alternating current, then which of the following statements are correct?

Which of the following harmonics are present in the resultant MMF produced by 3 phase currents flowing in the 3 phase windings?

The rotating MMF wave of constant amplitude can be produced, only if the time angle displacement between currents is ____________

In case of the 3 phase winding with delta or star connection without neutral, if one of the supply lines gets disconnected, then the MMF becomes _______