1. Home
  2. Electronics Design
  3. Looking for simple and reliable voltage doubler 12->24v

Looking for simple and reliable voltage doubler 12->24v

Hello as the topic says i'm looking for a simple design for a 12 to 24 volt convereter. I have been looking around and realize that there are charge pumps, transfomer methods and inductor methods to use. When it comes down to it i need up to .5 amps at the 24 volts and it needs to be reliable and not sensitive to mechanical vibrations (to be mounted on something similar to a gocart and run off of the 12 volt system) The smaller the package the better no more than two cubic inches or so. This will be used to drive two air solenoid valves for shifting and clutching. Any recomendations are welcome. I know there are many maxim chips that are very much suitable for the application but for some reason i feel somewhat hesitant to go the route of a single IC. thanks in advance

--
Posted via a free Usenet account from http://www.teranews.com
Reply to
rkremser
Loading thread data ...

Then you need to use a transformer - preferably with push pull drive.

Reply to
Homer J Simpson

As your air solenoids presumably wouldn't require a regualted 24V, you may find this off-the-shelf unit meets your requirements (unless you have compelling reasons to build your own).

formatting link

Reply to
budgie

--- Like you know something about it? "Charge pump" _requires_ a DC output, so post a schematic instead of just flapping your jaws, bonehead.

Come to think of it, I don't think I've ever seen you post anything other than your self-serving run-of-the-mill drivel.

Geez, I wonder why???

Could it be because you're still the same (idiot electrician licensed in Canada because you managed to bullshit your way through the test) simple shit who couldn't figure out how to use a current transformer?

More than likely.

-- JF

Reply to
John Fields

I have some 24v hydraulic valves that work just fine at 12v -- so just for grins -- try tripping the solenoid on 12v -- its just an electromagnet and may pull suffciently to operate on the lower voltage

Reply to
John Barrett 

--
2.7 cubic inches:

http://vicorwebapps.vicorpower.com/upc/FirstGenDCDCInit

Google "DC to DC converter and you'll probably find just what you're
looking for without having to build anything.
Reply to
John Fields

huh? a charge pump needs push-pull but no transformer. and a boost converter needs only a single ended drive on the inductor

--

Bye.
   Jasen
Reply to
jasen

for 12 W?

Reply to
Homer J Simpson

sure.

Bye. Jasen

Reply to
jasen

You can use a diode to replace the the other transistor. You actually don't need a transformer, just a coil. The coil is between the battery voltage and the load with the diode in series after the coil. The transistor pulls the coil-diode connection to ground long enough to put enough current into the coil, then it releases. While the transistor is turned on, the diode is reverse biased. When the transistor opens up the coil field collapses and the voltage on it reverses boosting the output voltage. With this wiring the coil voltage adds to the battery voltage. A controller modulates the pulse width of the transistor drive in order to maintain a set output voltage.

These circuits are not hard to understand, but they are closed loop feedback controllers and attention must be paid to all the details. So it would be easier to use one off the shelf or to change the solenoids to work on a 12 volt drive.

Reply to
rickman

The solenoid valves I have seen have 2 parts: the valve body and the coil. You select the coil according to the voltage source you have available. Is getting a coil of the proper voltage not an option?

Reply to
JeffM

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.