Talk:Magnetic amplifier
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[edit] Merge or expansion?
I have been writing, off and on, a page on the history of magnetic amplifiers, while being unaware of this page until a recent general search. Would there be any benefit in merging the two articles together, or keeping them separate? This one appears to deal more with the technology, while the article I've been working on deals more in the history of the subject. Comments? Erzahler 21:29, 20 July 2007 (UTC)
Just a question re: the claim that magnetic amplifier is an amplifier of type class-H? Is this so, and if so, how? I would argue, rightly or wrongly, that the role of the mag amp historically has been to provide a controllable output voltage from an alternating voltage source by using a small current to modulate the effective impedance of the mag-amp ie: the exact point at which it no longer will block the supply voltage. How would this be class-H? Comments, anyone? —Preceding unsigned comment added by 61.68.107.47 (talk) 12:35, 3 December 2007 (UTC)
(New author) I had the pleasure of using and seeing the schematic of a two stage magnetic amplifier that was used to control the magnetic field of a large electromagnet. It had a large DC gain and with a resistor for feedback produced a gain of near 1000. The DC input, I presume was from a spinning coil in the magnetic field, some few millivolts and the output of the amplifier was some volts, used to control the magnet (3 phase AC input)power supply. As I remember the AC source for the magnetic amplifier was a few volts at an audio frequency and there were two sets of reactors (maybe two reactors). The output from the first set was fed as input to the second set to produce the large power gain. The intermediate connection did not to my knowledge involve any nonlinear parts such as transistors or diodes and the output was a voltage source proportional to the input voltage similar to a DC op-amp circuit. Unfortunately I did not copy the page and It is likely lost from the University of New Orleans Physics Department. I am trying to figure out how this worked and possibly recreate a crude replica. -
I would not view this device as a class H amplifier but rather as related to class B with AC rails. However the final output of my (school's) amplifier was a good grade of DC. If you can find anything on this or even advise on experiments contact me-Charles (august04@verizon.net) —Preceding unsigned comment added by 71.164.33.26 (talk) 02:25, 25 January 2008 (UTC)
