This is basically about the working principle I am confused about this issue. Pls help.
2007-03-07 02:52:00 · 3 answers · asked by usha r 1 in Science & Mathematics ➔ Engineering
All electric machines (motors OR generators) operate based on the magnetic effect between the stationary portion and the rotating portion.
For a DC machine, the stationary portion holds 'fixed' polarity magnets that are either electromagnets (copper wound around steel poles), or permanent magnets. The rotating portion has an embedded coil that alternates polarity as the brush contact makes/breaks during rotation.
When motoring, the rotor tries to 'match up' with the stationary field of opposing polarity (a 'south' rotor field will go looking for a 'north' stator field) ... which in turn makes the shaft rotate.
When generating, an outside driver turns the shaft through the magnetic field created by the stationary poles, thereby creating a current in the rotating winding and 'generating' power.
2007-03-07 04:20:59 · answer #1 · answered by CanTexan 6 · 0⤊ 0⤋
even as a cord carrying an electric powered modern-day is moved in a magnetic field of a magnet the magnetic field led to by technique of the cord reacts with the magnetic field of the magnet causing the cord to flow outwards. Fleming's left hand rule permits you to foretell the flow. First finger - route of magnetic field (N-S) 2d finger - route of modern-day (efficient to detrimental) ThuMb - moves of the cord
2016-12-05 09:03:49 · answer #2 · answered by Anonymous · 0⤊ 0⤋
It's based on magnetic effects. The left-hand rule simply makes it clear which way the coils should be wound so that they interact properly.
HTH ☺
Doug
2007-03-07 03:05:36 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋