Previous in Forum: Project Management for Mechanical CAD   Next in Forum: Hydraulic Hose Visual Inspection / Failure Criteria
Close
Close
Close
9 comments
Rate Comments: Nested
Participant

Join Date: Dec 2007
Posts: 2

AC/DC Motors (Help Appreciated)

12/27/2007 3:40 PM

Hi, hope someone can help with this

I want to make a magnetic cylinder spin by using another magnet, thus producing some electricity.

I then need a way to make a fan like object spin to around 20-25,000RPM making the fan pretty powerful.

I'm not sure on AC/DC motors & what to use.

Again i really hope someone can help me out with this.

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Power-User

Join Date: Jan 2007
Location: Knoxville, Tn
Posts: 141
Good Answers: 3
#1

Re: AC/DC Motors (Help Appreciated)

12/27/2007 11:18 PM

The vagueness of your post is kinda skeery. What are you trying to accomplish?

__________________
Analogies are like something else.
Register to Reply
Guru

Join Date: Jun 2007
Posts: 1035
Good Answers: 40
#5
In reply to #1

Re: AC/DC Motors (Help Appreciated)

12/28/2007 12:22 PM

Sounded clear-as-mud to ME...

He "want to make a magnetic cylinder spin by using another magnet, thus producing some electricity... then need a way to make a fan like object spin to around 20-25,000 RPM making the fan pretty powerful."

Sounds like he needs a Westing-Electric 504P coupled to a counter-rotating Generack X-Series Up-Winder with a Solar-Amplified De-boggler... Whadda U think?

.

Register to Reply Off Topic (Score 5)
Power-User

Join Date: Nov 2007
Location: Alberta Canada
Posts: 182
Good Answers: 9
#7
In reply to #5

Re: AC/DC Motors (Help Appreciated)

12/28/2007 1:49 PM

Is that a first or third generation Solar Amplified De-Boggler? (Don't even bother with the second generation, they were crap!)

__________________
Vote for something useful this time, vote to repeal the second law of thermodynamics!
Register to Reply Off Topic (Score 5)
Participant

Join Date: Dec 2007
Posts: 2
#8
In reply to #1

Re: AC/DC Motors (Help Appreciated)

12/28/2007 3:33 PM

Basically i'm trying to make an appliance, eg a garden blower just now run on magnetic power. I'm under the assumption if you connect a 25,000RPM motor to a car battery for example then there would be more than enough force than a regular blower. If that is correct i then want to take Neodymium magnets to replicate the electricity to power the motor. Hope all that makes sense.

Register to Reply
Commentator
Fans of Old Computers - Commodore 64 - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Control Engineering - Process Control Engineer

Join Date: Dec 2007
Location: Idaho, USA
Posts: 79
Good Answers: 2
#9
In reply to #8

Re: AC/DC Motors (Help Appreciated)

12/28/2007 4:42 PM

I don't want to burst your bubble, but If I understand you correctly, you are missing a couple of things. First of all, a magnet is not a source of power, it is a force, like gravity is a force. You can not plug a wire into gravity or magnetism. You can use these forces to move or store energy, but they are not energy in themselves.

Secondly, a high rpm blower does not equal moving a large volume of air. It may not have sufficient energy to do much of anything. It may spend all it energy spinning around quickly. If you bog it down with a load, it will slow down, to keep up the speed you have to add power. Try studying up on energy transfer (Power). There is no free lunch.

If you do manage to create a zero point energy snowblower I would be interested.

__________________
It is impossible to defeat a fool in an argument, he wil bring you down to his level and beat you with experience.
Register to Reply
Commentator

Join Date: Dec 2006
Location: india
Posts: 63
#2

Re: AC/DC Motors (Help Appreciated)

12/28/2007 5:16 AM

don't wast time,monney as well miend you can't produce eneargy even what you supplyed for ratating magnet.

science in magnetic field from last 17 years.

still if you produce 50% even post me artical i may further help you.

nayanelectronics@yahoo.co.in

Register to Reply
Guru

Join Date: Aug 2005
Location: Hemel Hempstead, UK
Posts: 5826
Good Answers: 322
#3

Re: AC/DC Motors (Help Appreciated)

12/28/2007 6:19 AM

Try a car scrap yard: get an alternator and an electric fan. You may need to remove the blades from the fan, and use a "fan belt" (non electric fan) to another pulley: to gear up the revs.

__________________
If you spend all your time looking for people and things to complain about: trust me, you will find plenty to complain about.
Register to Reply
Guru

Join Date: Jul 2007
Posts: 4448
Good Answers: 143
#4

Re: AC/DC Motors (Help Appreciated)

12/28/2007 12:19 PM

If you're going to run a fan at 25,000 rpm, you're almost surely gonna be supersonic at some point. You're looking at some serious stress and possible (probable?) explosion. People often do this in a vacuum or, at least, not in air.

__________________
"Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
Register to Reply
Commentator
Fans of Old Computers - Commodore 64 - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Control Engineering - Process Control Engineer

Join Date: Dec 2007
Location: Idaho, USA
Posts: 79
Good Answers: 2
#6

Re: AC/DC Motors (Help Appreciated)

12/28/2007 1:05 PM

Capstone makes a microturbine about the size of a refrigerator. They basically use a little tiny jet engine with a speed of 50,000 to 95,000 rpm. (Not a typo) It has one moving part. The rotor. It uses an air bearings instead of traditional bearings since traditional lubrication has a tough go of it at these speeds. They can be run off a lot of different fuels, for instance in L.A. the have a bunch of these running off of Landfill methane gas.

Google "microturbine" and you can get a lot of info that can help you in your quest. Maybe help you be more specific. After all this site is populated by engineers and we do like our specs.

__________________
It is impossible to defeat a fool in an argument, he wil bring you down to his level and beat you with experience.
Register to Reply
Register to Reply 9 comments
Copy to Clipboard

Users who posted comments:

AccuDave (2); jarunmagnet (1); ndt-tom (1); palinurus (1); Randall (1); t11chb (1); TVP45 (1); Zaphod2Headed (1)

Previous in Forum: Project Management for Mechanical CAD   Next in Forum: Hydraulic Hose Visual Inspection / Failure Criteria

Advertisement