Previous in Forum: Water as Working Medium in Wind Generation   Next in Forum: The Co-Combustion of Coal Flue Gas to Extract More Heat and Reduce Emissions
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
11 comments
Rating: Comments: Nested
Jim Pollock
Participant

Join Date: Nov 2013
Posts: 4
Good Answers: 1

New Axial Flux Alternator

11/16/2013 9:37 PM

Hello, I am new to this forum. My son is in an engineering class at his high school and he had a project where he was supposed to make an alternator that would light one small miniature christmas light bulb while running the alternator with a drill. We have a machine shop here at home so I suggested that he build something that would produce power while cranking by hand. So he built an axial flux alternator similar to the ones they use for windmills excepted smaller. We had a small aluminum gearbox that is about a 20:1 ratio. He made the alternator on this gearbox so when you crank it the alternator runs about 20 times faster than you crank it. It has 8 round neo magnets 3/4" x 1/8" on each rotor with 8 coils in the stator. This thing will light a whole string of christmas lights plus a 60 watt light bulb all at the same time while it is producing 140 volts. I think he did pretty good.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#1

Re: New axial flux alternator

11/16/2013 9:53 PM

Impressive.....no pics...? YouTube video...? Maybe he could add some wind turbine blades for a later model project....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
Jim Pollock
Participant

Join Date: Nov 2013
Posts: 4
Good Answers: 1
#2
In reply to #1

Re: New axial flux alternator

11/16/2013 10:07 PM

He took the alternator over to show his girl friend so I can't get any pics or video until he gets back. This thing will also run our 3/8 drill, jig saw or our 4 1/2" angle grinder. I thought about putting blades on it later to make a windmill. I think it will be a good tool in the class room to see how much harder it is to power a 100 watt bulb as apposed to say a 60 watt bulb.
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#3
In reply to #2

Re: New axial flux alternator

11/16/2013 10:49 PM

Yes I agree, the amount of work that it takes to make electricity is a valuable concept to acquire....also the amount of energy that is expended vs that produced, is a good learning tool for efficiency and the role it plays in everyday life....Understanding that these are all forms of energy that is just being transformed from one form to another form, is the methodology of how modern society raises the quality of life....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
Jim Pollock
Participant

Join Date: Nov 2013
Posts: 4
Good Answers: 1
#4
In reply to #3

Re: New axial flux alternator

11/16/2013 10:59 PM

Here is a link to the you tube video. It is powering the whole string of christmas lights plus a 90 watt bulb.

http://www.youtube.com/watch?v=R4T37vHxKNk
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#5
In reply to #4

Re: New axial flux alternator

11/16/2013 11:05 PM

I would have it start with no load and add devices one at a time so the force of resistance can be felt for each device.....would be nice to have a handle made out of a torque wrench so a visual representation of resistance could be seen....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
J.A.C.
Commentator

Join Date: Nov 2013
Location: United Kingdom
Posts: 65
Good Answers: 3
#10
In reply to #4

Re: New axial flux alternator

11/18/2013 2:40 PM

that is awesome
Register to Reply
user-deleted-1105
Guru
Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
Location: Harlow England
Posts: 16512
Good Answers: 670
#6
In reply to #2

Re: New axial flux alternator

11/17/2013 3:06 AM

If she's impressed... then she's a keeper

Del

__________________
 health warning: These posts may contain traces of nut.
Register to Reply
2
Jim Pollock
Participant

Join Date: Nov 2013
Posts: 4
Good Answers: 1
#7

Re: New Axial Flux Alternator

11/17/2013 7:34 PM

Here is new you tube video of the alternator.

http://www.youtube.com/watch?v=jxELp6a2rME&feature=youtu.be
Register to Reply Good Answer (Score 2)
No more Good Answers.
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#8
In reply to #7

Re: New Axial Flux Alternator

11/17/2013 8:44 PM

Well done.....can't wait to see the next project....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
Wal
Guru

Join Date: Jun 2011
Location: Phnom Penh
Posts: 4019
Good Answers: 102
#9

Re: New Axial Flux Alternator

11/17/2013 11:04 PM

Nice job.

Hours of classroom fun waiting to be had there.

Ready.... set....crank....

__________________
 Difficulty is not an obstacle it is merely an attribute.
Register to Reply
JWthetech
Guru
Fans of Old Computers - ZX-81 - New Member

Join Date: Feb 2011
Location: 18N 65W o
Posts: 1003
Good Answers: 28
#11

Re: New Axial Flux Alternator

11/19/2013 12:17 AM

I remember taking the kids to the WTC back in the '80's. ConEd had a display, there was a bicycle driven generator attached to a 100 watt bulb. IIRC you really had to ride hard to get it to light.
Register to Reply
Register to Reply
Have a Different Question?
11 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

J.A.C. (1); Jim Pollock (3); JWthetech (1); SolarEagle (4); user-deleted-1105 (1); Wal (1)

Previous in Forum: Water as Working Medium in Wind Generation   Next in Forum: The Co-Combustion of Coal Flue Gas to Extract More Heat and Reduce Emissions

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Sustainable Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (89 right now)
Show Members
Advertisement