The impulse that will damage the rectifier is short duration , very short compared to the cycles of 50 or 60Hz AC you are generating.
For the whole of the duration of the dangerous pulse voltage, the the generator does not move very far, and it can be considered to be static (not rotating). (Think like a flash photo freezes the action ? Its not really frozen, but it looks as if it is.)
Now if you just have coils in a more or less fixed orientation, that is a transformer, albeit one with a funny shape.So the pulse coming in from the load side ends up being transformed into a pulse on the diode side of the rotor winding..
The Back EMF in a motor is the generator voltage - so the supply only needs to provide the difference.
However, I am thinking of the very short duration back EMF you get when you switch off a current in an inductive circuit.
The impulse that will damage the rectifier is short duration , very short compared to the cycles of 50 or 60Hz AC you are generating.
For the whole of the duration of the dangerous pulse voltage, the the generator does not move very far, and it can be considered to be static (not rotating). (Think like a flash photo freezes the action ? Its not really frozen, but it looks as if it is.)
Now if you just have coils in a more or less fixed orientation, that is a transformer, albeit one with a funny shape.So the pulse coming in from the load side ends up being transformed into a pulse on the diode side of the rotor winding..
The Back EMF in a motor is the generator voltage - so the supply only needs to provide the difference.
However, I am thinking of the very short duration back EMF you get when you switch off a current in an inductive circuit.
