inductance idéale

12:42 Jan 18, 2015 

Thanks very much all - very helpful and very much appreciated.

06:57 Jan 15, 2015 

What you say is correct and it's good background information but I think it muddies the waters a bit as it isn't necessary to answer this question.

The context does not mention additional resistors or capacitors so I think we can reasonably assume that the resistive and capacitive effects are negligible in this application.

Of course, the author may go on to add them later, to improve the model.

23:58 Jan 14, 2015 

An 'ideal' inductor is one that ONLY exhibits the phenomenon of 'inductance'; it has no resistance, no capacitance (self-capacitance or capacitance vis-a-vis the environment), nor anything else. Of course, such a specimen does not (cannot) exist in the real world. The 'inductance de fuite' represents the induction losses associated with the 'real' inductor. There might also be a series reistance to represent the resistance of the 'ideal' inductor's winding, and one or more capacitors to represent the capacitance of the 'ideal' inductor wrt its environment, and/or to itself.

14:14 Jan 14, 2015 

You already have the right answer twice so not much use me posting it again :)

What the sentence is saying is that inductors work by inducing a magnetic field which is then used to perform useful work of some sort. In the real world, some of this magnetism is lost through leakage. For the purposes of modelling, the author is representing this real world inductor by two inductors in series - one that is perfect and all of its magnetism is used for the real work and one where all of its magnetism is lost (the leakage inductor). Both of these inductors are fictitious but, taken together, they provide a realistic model of the real-world inductor.