Magnetic inductors....What are they called?

[Seekonk]

I was taking some components out of a TV before I recycled it. It was a CRT type, one of the last runs for these.  I noticed screws and other things sticking to these.  These radial open bobbin flyback inductors were wound on a fairly strong magnet.  Everyone knows that an inductor becomes just a resistor once it saturates.  Starting with a core that is magnetized should allow you to store twice the energy.  That is, if you don't drmagnetize the core in the process.  Anyway, this is the first time I have seen these in a product and I have been traring things apart for more than 40 years.  Went looking for an app note for an interesting read.  None of the search terms  I used came up with anything.  Any idea on what these are called?

[Rufus]

"Biased Inductor" or " Magnetically biased inductor"

Hits a few patents and papers. Doesn't seem to hit any products you can buy.

[T3sl4co1l]

It's either for extending the useful range of a flyback inductor (does the expense of a magnet justify the added range?), or for controlling the nonlinearity in a saturating application (more likely -- deflection circuitry).

Tim

[megajocke]

Sounds like the horizontal linearity correction coil:
http://www.repairfaq.org/sam/deflfaq.htm#dshlc