Graham Gunderson's Energy conference presentation Most impressive and mysterious

[TinselKoala]

I've scavenged at least a dozen CRT TVs and monitors over the past couple of years for parts. Each and every one of them has had at least one inductor on the circuit board that is biased by a permanent magnet glued to the ferrite core. Some of these inductors appear to have several windings, some have just one winding.
These circuit boards are built to the lowest possible unit cost. The reasonable conclusion is that the permanent magnets are doing something desirable and useful, since it would certainly cost less to build the circuits without using them.

Of course MH's point still holds. Any reasonable experimenter attempting to justify his use of permanent magnets in some device should be prepared to perform and publish the results of comparison tests showing some significant positive effect of using magnets. I'm quite sure the manufacturers of those TV and monitor circuits I've taken apart could justify their use of magnets. That is, if there is anybody still working there who remembers how to design circuits for CRT-based systems.

Can anyone else?

[hoptoad]

I've scavenged at least a dozen CRT TVs and monitors over the past couple of years for parts. Each and every one of them has had at least one inductor on the circuit board that is biased by a permanent magnet glued to the ferrite core. Some of these inductors appear to have several windings, some have just one winding.
These circuit boards are built to the lowest possible unit cost. The reasonable conclusion is that the permanent magnets are doing something desirable and useful, since it would certainly cost less to build the circuits without using them.

Of course MH's point still holds. Any reasonable experimenter attempting to justify his use of permanent magnets in some device should be prepared to perform and publish the results of comparison tests showing some significant positive effect of using magnets. I'm quite sure the manufacturers of those TV and monitor circuits I've taken apart could justify their use of magnets. That is, if there is anybody still working there who remembers how to design circuits for CRT-based systems.

Can anyone else?

Permafield inductors were also widely used in the telephone switching systems of the 1940s-1970s. They were used for very specific relay timing sequences where a fast acting, slow release, or slow acting, fast release relay was needed to control the sequencing of other relays. Ordinarily this sort of timing was achieved with diodes and resistors across the relay coil/s, or heel end or front end copper slugs, and specific contact tensioning.

But in smaller, faster relay switching systems permafield inductors using weak steel magnets coupled to non retentive magnetic stainless steel cores were favoured. Some permafield relays, once triggered, would hold the armature indefinitely without further current applied, until a brief pulse of opposite polarity was applied to the relay coil.

Cheers

[ramset]

MileHigh
It would of course  Be "quackery"
Until it is Not.

If this Device turns out to be genuine.. there'll be a lot of Quacking around here !

Your perspective Is By no means Unique.


respectfully

Chet K

[tinman]

There are a number of reasons you would want to bias an inductor with a PM field.

Some use it as a means to reduce winding turn amounts-thus decreasing resistive losses,and some to reduce the size of the inductor core to achieve the same result.

The most common-which may be the reason the Gun is using PMs to bias his transformer core,is to offset core saturation current values-in that the core will become saturated using only a small amount of current flow in one direction,and a large amount of current flow in the opposite direction is required to saturate the core with the opposite magnetic flux to that of the biasing field.

What is a magnetic field-what is the magnetic force?

An electromagnetic field is made up of photon's,but what about a PMs field?
We take away the electric field,and we have a field of virtual photons-that is your magnetic force.

Has anyone ever bothered to experiment with electromagnetic fields and a solar panel?

Come on guy's-put it altogether here.


Brad

[MileHigh]

TK:

Let's Google!

http://www.eevblog.com/forum/beginners/magnetic-inductors-what-are-they-called/

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?

http://www.repairfaq.org/sam/deflfaq.htm#dshlc

Horizontal Linearity Correction

Since there is non-zero resistance associated with the components (mainly coil losses) in the yoke circuit (yoke winding, ESR of S-cap, etc.) the world is not quite as ideal as one would hope. Without compensation, this resistance would result in non-linearity of the picture - it would tend to be squashed on the right side as the resistance saps energy from the yoke circuit.

The waveform becomes a damped sinewave, which will be 'undamped' by restoring energy during the flyback.

One way to deal with this is to add a magnetically biased saturable inductor in series with the horizontal deflection yoke. This is called the linearity coil.

Its core is magnetically biased near the point of saturation such that the inductance decreeases with increasing current and this helps to stretch the right hand side of the scan. In other words, during the scan the coil saturates so that the inductance decreases. At the end of scan there is practically no voltage left over the linearity coil so that the deflection coil gets maximum voltage.