EcoModder Forum Electrical engineering question - power generation

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 07-12-2014, 01:10 AM #1 (permalink) Moderate your Moderation.   Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts Electrical engineering question - power generation This is actually a fairly simple question, but despite all the reading I've done recently, there are some things not necessarily clear in my head, so given my past experience with helpful members of this forum, I thought his would be a good place to inquire. Basically, my question is this: If I make two barrel type coils (a LA Faraday Flashlight) of identical specification, and use them in conjunction with two magnets of identical specification, I have in essence made two identical generators. For the purpose herein, well say that at 300 passes per minute, each generator is capable of making 1.5VDC @ 1A after being rectified. If I want to wire the two separate generators' coils in series, this creates 3.0 VDC @1A, while parallel link creates 1.5VDC @ 2A, is this correct? A second question - When combining the outputs of the two generators, should this be done before or after rectifying output from each coil? Third - Given that the magnets travel through the coils is variable, is it feasible that one magnet should induce current in more than one coil, wired parallel, with a series of magnets inducing each set of parallel coils, their outputs wired in series (to increase voltage). If the questions are unclear or require more information, I can provide crude diagrams to he'll explain.. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı" Last edited by Christ; 07-12-2014 at 02:43 AM..
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Quote:
 Originally Posted by Christ If I want to wire the two separate generators' coils in series, this creates 3.0 VDC @1A, while parallel link creates 1.5VDC @ 3A, is this correct?
No, I don't think you'll get a free 1A by wiring two 1A sources in parallel.
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 The Following User Says Thank You to redpoint5 For This Useful Post: Christ (07-12-2014)
 07-12-2014, 02:43 AM #3 (permalink) Moderate your Moderation.   Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts Typo, fixed. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
 07-12-2014, 02:49 AM #4 (permalink) Eco-ventor     Join Date: Oct 2010 Location: sweden Posts: 1,541 Princess - '92 Mazda MX-3 GS House of TudorTeam Mazda 90 day: 53.54 mpg (US) Shirubāarō (*´ω｀*) - '05 Toyota Prius Executive Team Toyota 90 day: 54.88 mpg (US) Blue Thunder - '20 Hyundai IONIQ Trend PHEV Team HyundaiPlug-in Hybrids Thanks: 68 Thanked 629 Times in 399 Posts Unless you can keep them exactly in sync, it is better to rectify first. __________________ 2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US) 2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
 07-12-2014, 03:08 AM #5 (permalink) Human Environmentalist     Join Date: Aug 2010 Location: Oregon Posts: 9,130 Acura TSX - '06 Acura TSX 90 day: 28.24 mpg (US) Lafawnda - '01 Honda CBR600 F4i 90 day: 47.32 mpg (US) Big Yeller - '98 Dodge Ram 2500 base 90 day: 21.82 mpg (US) Prius Plug-in - '12 Toyota Prius Plug-in 90 day: 57.64 mpg (US) Mazda CX-5 - '17 Mazda CX-5 Touring 90 day: 26.83 mpg (US) Thanks: 3,182 Thanked 3,497 Times in 2,605 Posts I would tend to agree with Jakob, but I'm no expert in this regard. Christ, you ask good questions, and now I'm curious as well. Perhaps your testing will educate us. __________________ Gas and Electric Vehicle Cost of Ownership Calculator Give me absolute safety, or give me death!
 07-12-2014, 12:49 PM #6 (permalink) Master EcoModder     Join Date: Jan 2008 Location: Sanger,Texas,U.S.A. Posts: 12,784 Thanks: 20,500 Thanked 6,307 Times in 3,907 Posts 3-vdc Are you looking for 3-volts? Like to run LEDs? Or would you wind your coils with a secondary (a transformer) to step up your voltage to 12-volts AC before the rectifier? __________________ Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
 07-12-2014, 05:18 PM #7 (permalink) Moderate your Moderation.   Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts I'm actually looking at building a tubular setup with multiple coils and magnets its length that is capable of producing 14.4 or better, which will then be rectified and converted to DC, used in a situation similar to an automotive electrical system, to charge batteries that are in use. I don't know if there is a single iteration that could replace an existing charging system, but there is most certainly room to use such a device concurrently to extract otherwise wasted motion. Need the magnets be isolated from each other or stacked in opposing orientation? I feel like stacking them complementary to each other destroys the possibility of flux lines existing outside then surface of the magnets... __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı" Last edited by Christ; 07-12-2014 at 05:25 PM..
 07-12-2014, 05:20 PM #8 (permalink) Moderate your Moderation.   Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts The design I have in my head is basically a stack of magnets oriented north facing south, passing through several stacked coils. The variable and unpredictable stroke is really at issue here, so it may be best to make each coil capable of providing the necessary voltage by itself, so that shorter strokes don't 'miss' producing the correct voltage to drive the circuit. In other words, each stacked coil provides, say, 14.5 vdc @ 500ma, so a longer stroke just boosts the amperage in the circuit by passing more coils through more flux lines, but a shorter stroke will still produce the correct voltage to power the circuit, despite being less 'driven' in terms of charging ability. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
 07-12-2014, 05:56 PM #9 (permalink) Master EcoModder     Join Date: Oct 2012 Location: USA Posts: 1,408 awesomer - '04 Toyota prius Thanks: 102 Thanked 249 Times in 201 Posts typically designers use a buck and/or boost converter to stabilize the output when the input is variable (i.e. regen)