Outer Limits 4x4 Board

Hey guys, might sound like a silly question for some, but just wondering if a 24v truck air compressors clutch able to be actuated by only 12 volt. Like I said, silly question, but is there a simple answer? Or do I just stick to putting a 12v compressor in?

put an invertor in...

Is there such a thing? 12V stepped up to 24V? I know you can get them round the other way.

u can get 12-240, to run laptops/tvs/hairdryers(theres always one woman in the group who needs one...), so y not 12-24?

You can get 12 to 24, but it will cost more than you might expect.

You can test whether 12V engages the clutch by just trying it. You might also be able to bolt on a clutch from a 12V one instead.

But the easiest approach would just be to go with a 12V compressor.

Yeh, I used a 12v one last time, did the job OK......just wasted something that was faster and pumped more air!!!!! Might get one anyway and try to engage it with only 12v. I seem to think that it will engage anyway, just weather or not it will slip?

over time the solenoid windings in the clutch will burn out due to excessive current.

ausoops wrote:over time the solenoid windings in the clutch will burn out due to excessive current.

How do you come to that conclusion?

-Scott- wrote:

ausoops wrote:over time the solenoid windings in the clutch will burn out due to excessive current.

How do you come to that conclusion?

put 12v through a coil designed for 24v and it WILL burn out. the coil will need to pull almost double the current to create the same strength magnetic field.

ausoops wrote:

-Scott- wrote:

ausoops wrote:over time the solenoid windings in the clutch will burn out due to excessive current.

How do you come to that conclusion?

put 12v through a coil designed for 24v and it WILL burn out. the coil will need to pull almost double the current to create the same strength magnetic field.

Ohm's Law?

The coil has a fixed resistance. Halve the voltage and it will halve the current, consuming one quarter of the power. It won't create the same strength magnetic field. It won't burn out.

-Scott- wrote:

ausoops wrote:

-Scott- wrote:

ausoops wrote:over time the solenoid windings in the clutch will burn out due to excessive current.

How do you come to that conclusion?

put 12v through a coil designed for 24v and it WILL burn out. the coil will need to pull almost double the current to create the same strength magnetic field.

Ohm's Law?

The coil has a fixed resistance. Halve the voltage and it will halve the current, consuming one quarter of the power. It won't create the same strength magnetic field. It won't burn out.

Hence it's a question of a practical test of whether 12V is enough to engage the clutch or not. I wouldn't be prepared to guess either way.

-Scott- wrote:

ausoops wrote:

-Scott- wrote:

ausoops wrote:over time the solenoid windings in the clutch will burn out due to excessive current.

How do you come to that conclusion?

put 12v through a coil designed for 24v and it WILL burn out. the coil will need to pull almost double the current to create the same strength magnetic field.

Ohm's Law?

The coil has a fixed resistance. Halve the voltage and it will halve the current, consuming one quarter of the power. It won't create the same strength magnetic field. It won't burn out.

my bad, i wasnt thinking

ausoops wrote:

-Scott- wrote:

ausoops wrote:

-Scott- wrote:

ausoops wrote:over time the solenoid windings in the clutch will burn out due to excessive current.

How do you come to that conclusion?

put 12v through a coil designed for 24v and it WILL burn out. the coil will need to pull almost double the current to create the same strength magnetic field.

Ohm's Law?

The coil has a fixed resistance. Halve the voltage and it will halve the current, consuming one quarter of the power. It won't create the same strength magnetic field. It won't burn out.

my bad, i wasnt thinking

There is something that's more likely to burn out with too little voltage though isn't there? Is it a particular type of motor? Something? Dunno, just rings a bell basically.

chimpboy wrote:

ausoops wrote:

-Scott- wrote:

ausoops wrote:

-Scott- wrote: How do you come to that conclusion?

put 12v through a coil designed for 24v and it WILL burn out. the coil will need to pull almost double the current to create the same strength magnetic field.

Ohm's Law?

The coil has a fixed resistance. Halve the voltage and it will halve the current, consuming one quarter of the power. It won't create the same strength magnetic field. It won't burn out.

my bad, i wasnt thinking

There is something that's more likely to burn out with too little voltage though isn't there? Is it a particular type of motor? Something? Dunno, just rings a bell basically.

Yes, sounds familiar to me too - can't think what, off the top of my head. A switchmode device may attempt to draw too much current if it's input voltage is too low? Good design should cause the device to shut down before causing damage.

-Scott- wrote:Yes, sounds familiar to me too - can't think what, off the top of my head. A switchmode device may attempt to draw too much current if it's input voltage is too low? Good design should cause the device to shut down before causing damage.

I wonder if it's a DC motor stalling due to too little voltage and then just getting hotter and hotter due to the current that is passing into it... hrmm, dunno. I just made that up, it may not make any sense in reality