Eletronic clutch?

[B.M.800]

I thought for sure there was a tread with something about these... but I cant seem to find it.

So then, would one work for gokart/minibike purposes?

My dad thinks they would not, they lock up tight, and stall the motor... or break it.

What do you think?

 

[Russ2251]

Electromagnetic would be more correct.
Dad is right (aren't they always?). Almost zero slippage.

 

[B.M.800]

So then nogo for gokart then... ok thanks!

 

[migel101]

you could create a mechanism that would "slip" at a set torque level

 

[Russ2251]

you could create a mechanism that would "slip" at a set torque level

And to accomplish this, you would...?
A c-clutch would be/is far simpler and less expensive.

 

[Badot]

I'd be rather surprised if you can't regulate how hard it grabs with voltage regulation or through some other fairly simple method.

 

[fowler]

it is a magnet so it just snaps

try getting two big magnet and bringing them together slowly

depending how strong the force needs to be u might be able to make the clutch slip a little by makeing the magnetic force really weak but im not sure that will work

 

[oldbikerarlo]

You could try useing an electric trailer brake regulator. They have an ajustable voltage control.

The biggest problem I see with an electro-clutch is the power to keep it engaged, you will need a fairly heavy duty generator to keep it powered up.

 

[KILLDOZER]

You could try useing an electric trailer brake regulator. They have an ajustable voltage control.

The biggest problem I see with an electro-clutch is the power to keep it engaged, you will need a fairly heavy duty generator to keep it powered up.

I had considered this, and did a little experimentation. Then when I tried to run the clutch on an old 11HP B&S, there was not enough juice to engage the clutch. So you are correct, you'd have to employ an engine from a mower that originally had one of these things on it.

http://www.diygokarts.com/vb/showthread.php?p=143831#post143831

 

[machinist@large]

Electric AC clutches are not designed for controlled slippage, like in a driving app. The only slippage they are rated for is when the AC is engaged.

The idea of having something that slips a a predetermined torque level is doable, its called a slip clutch. Various designs exist, and are found on a large number of different machines, such as brush hogs, various forms of farm machinery, etc.

The idea of an electric clutch Per Se, is doable, they're used a lot in AWD cars , trucks, etc. for engaging the secondary axle. You could try salvaging one from a compact car? maybe? It would probably have to run in oil for it to live, but you never know.:beta1:

 

[KILLDOZER]

Electric AC clutches are not designed for controlled slippage, like in a driving app. The only slippage they are rated for is when the AC is engaged.

The clutch I was playing with is off of a mower, an electric clutch to engage the deck. I would expect these to operate just fine if slipped - they have a 5-6" dia steel friction disk not unlike an automotive clutch.

The idea of having something that slips a a predetermined torque level is doable, its called a slip clutch. Various designs exist, and are found on a large number of different machines, such as brush hogs, various forms of farm machinery, etc.

I think you are talking about a torque limiter here. These don't slip at all until "X" amount of torque is applied, and beyond said "X" torque, they never lock up. These are to prevent damage north of the limiter, if a jam occurs south of the limiter. These won't work on a go kart, as they would be locked up at low rpm and idle, and slip when you get moving (assuming you hit rated torque. If you didn't hit rated torque, there would be no slip anywhere/anytime...)

The idea of an electric clutch Per Se, is doable, they're used a lot in AWD cars , trucks, etc. for engaging the secondary axle. You could try salvaging one from a compact car? maybe? It would probably have to run in oil for it to live, but you never know.:beta1:

Are you talking about a viscous coupling? These units are sensitive to differentiating rpm input vs. output, and would not allow a freewheeling idle. The moment the two halves differ in speed, the fluid causes the output to increse in speed to match the input. These wouldn't work either, as the speed matching effect would prevent the necessary slip required to start up, and pull away.

 

[machinist@large]

1) Mower deck clutch- I've never had a unit with one.

2) The way original question was worded, that's what it sounded like to me.

3) Electric clutch as used in some 4WD trucks to lock a center differential to garentee equal power goes for and aft.

 

[fowler]

u can make a slip clutch like a pto shaft on a tractor

it is just 3 peices of circular metal with fricton discs between them and they are sandwiched by bolts springs

u could do this but use smaller springs

 

[oscaryu1]

Reading around it's said they draw 12v and 2-3amps. If you could build a little PWM circuit, I'm almost positive you could regulate the slip. Might not be GOOD for the clutch, but you COULD regulate it.

 

[CaptCanadia]

Or you could just buy a c clutch.

Over complication!