Talk:Excitation (magnetic)

The article says "A 240 volt, 5 amp load appears to be a 240 amp load when driven with 5 volts" This assumes that the load takes a constant power. If it is a resitive load then the current is proportional to the voltage, so a 240 volt 5 amp resitive load (48 ohm) appears to be a 0.02 amp load when driven with 5 volts. TimMorley (talk) 13:26, 17 March 2008 (UTC)
 * I make it 0.104 amp (5/48) but I agree that the original claim is dubious. Biscuittin (talk) 15:07, 19 July 2009 (UTC)

Out of date?
I'm wondering if the whole of this article has been sourced from the same 1917 book as the picture. It is all about DC machines which are no longer used in power stations. Biscuittin (talk) 18:55, 19 July 2009 (UTC)
 * (years later) I was at a hydro plant in July 2011 and it uses DC machines for generator excitation. True, they didn't *sell* any DC power, but the machines are still around and still useful. --Wtshymanski (talk) 14:03, 29 September 2011 (UTC)

Voltage and current
"The shunt-wound generator output varies with the current draw, while the magneto output is steady regardless of load variations". I disagree with this. The voltage of any generator will fall as the current increases (because of armature resistance) unless a compensatory winding is fitted. Biscuittin (talk) 19:29, 19 July 2009 (UTC)
 * The phrase is correct: since the magneto is not connected to the load at all, its output does not depend on the load variations. Removing comment in the article. --Викидим (talk) 00:15, 7 June 2022 (UTC)

Suggest merge
Shunt generator can be merged here. We also should describe excitation of motors. --Wtshymanski (talk) 14:03, 29 September 2011 (UTC)
 * Also need to describe load/voltage regulation characteristics for generators, and speed/load characteristics for motors. --Wtshymanski (talk) 14:26, 29 September 2011 (UTC)


 * Oppose merge There is nothing in either of these articles to merge. Our task to write content from scratch. We can do this equally well under either title, and would probably be best doing it, as appropriate, under both. Overlap is not a problem. Andy Dingley (talk) 13:40, 30 September 2011 (UTC)

Note that this was previously discussed at Talk:Electric_generator Andy Dingley (talk) 13:41, 30 September 2011 (UTC)

This not fully accurate...if a generator is seperately excited, then the problem of voltage varying with load current can be overcome due to independant source controlling the field magnetism. Also, there is no need to merge articles as each is a defined area of study. Robert  0850  13 Feb 2012  — Preceding unsigned comment added by Shadgill (talk • contribs) 14:51, 13 February 2012 (UTC)