magnetos

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Subject Author Date magnetos carjo 08-09-2008  Re: magnetos m II 08-09-2008  Re: magnetos Vaughn Simon 08-09-2008  Re: magnetos m II 08-09-2008  Re: magnetos sno 08-09-2008  Re: magnetos EXT 08-09-2008
Posted by on August 9, 2008, 6:24 pm Please log in for more thread options Along time ago in a land far away, WAAAAAy back when I was just a young lad,there still some of the early automobiles left on the streets that did not have batteries. They used magnetoes to supply energy to the spark plugs and a mans strong arm to turn over the engine. Now I need education. Can a magneto be used to charge a battery and why not. Thank you one and all for any enlightenment you can give me John, carjo@nethere.com Posted by m II on August 9, 2008, 6:39 pm Please log in for more thread options carjo@nethere.com wrote: > Along time ago in a land far away, WAAAAAy back when I was just a > young lad,there still some of the early automobiles left on the > streets that did not have batteries. They used magnetoes to supply > energy to the spark plugs and a mans strong arm to turn over the > engine. Now I need education. Can a magneto be used to charge a > battery and why not. A magneto makes really high voltage, but not much current. It's great for making a spark, but doesn't make enough volume of electricity (amperage) to charge a battery. It's like comparing a pressure washer with a tiny nozzle (great pressure, very low volume) with an irrigation pipe (great volume, low pressure). mike --=20 Densa International=C2=A9 'Think tanks cleaned cheap' Due to the insane amount of spam and garbage, I block all postings with a Gmail, Google Mail, Google Groups or HOTMAIL address. I also filter everything from a .cn server. http://improve-usenet.org/ Posted by Vaughn Simon on August 9, 2008, 6:41 pm Please log in for more thread options >Can a magneto be used to charge a > battery and why not. No, a magneto can't be used to directly charge a battery because it generates AC. An ignition magneto is generally a very power device that makes a very brief shot of very high voltage AC at a very low current for the express purpose of making a spark. To charge a battery, you would prefer to have continuous DC at a much lower voltage and a much higher current. Vaughn Posted by m II on August 9, 2008, 7:05 pm Please log in for more thread options Vaughn Simon wrote: > No, a magneto can't be used to directly charge a battery because it = generates=20 > AC. All rotating generators or alternators make AC. In the case of generators, a mechanical, rotating rectifier, called a commutator and brushes makes the dc output. In an alternator, the dc is made by solid state (diode) rectification. The trick with a magneto is to time where in the generation cycle the energy is sent to the spark plug, probably with adjustable points and a moveable backing plate. The permanent magnets energize the primary winding, with it's points. The secondary winding produces the high voltage, low current. Some good stuff here: http://www.old-engine.com/maghma.htm mike --=20 Densa International=C2=A9 'Think tanks cleaned cheap' Due to the insane amount of spam and garbage, I block all postings with a Gmail, Google Mail, Google Groups or HOTMAIL address. I also filter everything from a .cn server. http://improve-usenet.org/ Posted by sno on August 9, 2008, 6:46 pm Please log in for more thread options carjo@nethere.com wrote: > Along time ago in a land far away, WAAAAAy back when I was just a > young lad,there still some of the early automobiles left on the > streets that did not have batteries. They used magnetoes to supply > energy to the spark plugs and a mans strong arm to turn over the > engine. Now I need education. Can a magneto be used to charge a > battery and why not. Thank you one and all for any enlightenment you > can give me John, carjo@nethere.com A magneto is a high voltage low current generator....generally still used to fire spark plugs directly..as in aircraft....further explanation here.... http://en.wikipedia.org/wiki/Magneto_(electrical) Since charging a battery usually requires low voltage and a higher current a dc generator is normally used.....a generator can be set up to charge a battery using hand or foot power to operate...the length of time it will take is generally dependent on the size of the battery...this process is used in hand cranked flashlights and radios....battery is charged by generator...and light or radio operates for an extended period of time using battery.... hope helps....have fun.....sno