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 ______

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 ____________

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?

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 _______

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 _________

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 _______

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 __________