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#1
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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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 |
#2
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
"rkremser" wrote in message .. . 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 Then you need to use a transformer - preferably with push pull drive. |
#3
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On Fri, 2 Mar 2007 01:55:22 -0500, "rkremser"
wrote: 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 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). http://www.kemo-electronic.com/en/module/m029/index.htm |
#4
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On Sat, 03 Mar 2007 01:48:26 GMT, "Homer J Simpson"
wrote: "rkremser" wrote in message . .. 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 Then you need to use a transformer - preferably with push pull drive. --- 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 bull**** your way through the test) simple **** who couldn't figure out how to use a current transformer? More than likely. -- JF |
#5
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
"rkremser" wrote in message .. . 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 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 |
#6
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On Fri, 2 Mar 2007 01:55:22 -0500, "rkremser"
wrote: 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 Use the Maxim solutions. THey are the best possible solution. Sure, you could 'roll your own' with discrete components, but that's the hard way, will be less reliable, and probably be *much* larger in the end. |
#7
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
In article ,
PeterD wrote: On Fri, 2 Mar 2007 01:55:22 -0500, "rkremser" wrote: 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 Use the Maxim solutions. THey are the best possible solution. Sure, you could 'roll your own' with discrete components, but that's the hard way, will be less reliable, and probably be *much* larger in the end. I assume you work for Maxim. The OP can get a DC-DC convert from almost anyone else for the job. Look in Digikey. -- -- forging knowledge |
#8
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On Mar 3, 9:14 am, PeterD wrote:
On Fri, 2 Mar 2007 01:55:22 -0500, "rkremser" wrote: 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 Use the Maxim solutions. THey are the best possible solution. Sure, you could 'roll your own' with discrete components, but that's the hard way, will be less reliable, and probably be *much* larger in the end. Sure rolling your own may be more work, but I doubt that it will be any larger and is ,in fact, likely to be smaller. I have done a number of PS designs and they mostly were smaller than off the shelf designs, also cheaper. But the work is not trivial, even with a design example. In automotive apps (not sure how similar go-carts are to autos in this regard) you need a lot of input protection way beyond anything you see in other environments. Unless a module is designed for that it is likely to fail at a high rate. This applies to both bought modules and self designed ones. |
#9
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On 2007-03-03, Homer J Simpson wrote:
"rkremser" wrote in message .. . 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 Then you need to use a transformer - preferably with push pull drive. 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 |
#10
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
"jasen" wrote in message ... Then you need to use a transformer - preferably with push pull drive. huh? a charge pump needs push-pull but no transformer. and a boost converter needs only a single ended drive on the inductor for 12 W? |
#11
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On 2007-03-04, Homer J Simpson wrote:
"jasen" wrote in message ... Then you need to use a transformer - preferably with push pull drive. huh? a charge pump needs push-pull but no transformer. and a boost converter needs only a single ended drive on the inductor for 12 W? sure. Bye. Jasen |
#12
Posted to sci.electronics.design,alt.electronics,sci.electronics.basics
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Looking for simple and reliable voltage doubler 12-24v
On Mar 3, 7:51 pm, "Homer J Simpson" wrote:
"jasen" wrote in message ... Then you need to use a transformer - preferably with push pull drive. huh? a charge pump needs push-pull but no transformer. and a boost converter needs only a single ended drive on the inductor for 12 W? 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. |
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