High Current 12 to 24 VDC Voltage Doubler
High Current 12 to 24 VDC Voltage Doubler
(OP)
I need to power a 24 volt motor with a 12 volt car battery. How can I step the voltage up to 24 volts and allow for a possible spike of 250 amps at 24 volts? I found a 5000 watt DC voltage regulator that would work, but it is $7000! I don't need a very precise regulated voltage, if it fluctuated a couple of volts that would not be the end of the world. To make it more of a challenge, I need to keep it cheap, I am going to need 10 of these for the project I'm working on.
Thanks for any advice, it seems like it should be simple but I can't think of a good way to do this.
Thanks for any advice, it seems like it should be simple but I can't think of a good way to do this.





RE: High Current 12 to 24 VDC Voltage Doubler
RE: High Current 12 to 24 VDC Voltage Doubler
You need to tell us more about the application as your solution is likely the direct one, but the most expensive, and unneeded. If you can give us better details we can hit all the alternatives. Likely one will be much better than a 12->24V converter.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: High Current 12 to 24 VDC Voltage Doubler
Thanks!!
RE: High Current 12 to 24 VDC Voltage Doubler
If a plane's battery is dying just because of a long landing with engine at idle. Then the battery is sulfated (bad) and should be replaced before a more serious problem occurs.
Secondly to run a starter with an inverter you would need a monstrous thing certainly costing a fortune. Your 250A is likely even low.
On the other hand if the user could stand a 10~20 minute charge period, far less expensive devices may work.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: High Current 12 to 24 VDC Voltage Doubler
By the way, it is not uncommon for plane's batteries to die, even if they are brand new without. A lot of the older planes do not have alternators, they have generators that don't output much when you are at idle. If you are coming in at night with all of your equipment on, landing lights etc, and you begin your descent from 10,000 feet, you will easily be descending for 20 minutes... the older planes can't handle that. Trust me, there is a need for it, I used to work at an FBO and we had a couple planes a week come in looking for a charge.
Thanks for the help!
RE: High Current 12 to 24 VDC Voltage Doubler
Option B) Mount a 24 V alternator on the car, 10 minutes charging @ 50 Amps should start anything.
Option C) Couple a car starter motor to a 24 V alternator drive it from the car with jumper cables.
Option D) Buy or build a 24 V charger.
Roy
RE: High Current 12 to 24 VDC Voltage Doubler
Drop me an email maybe I can connect the dots. (not sure though)
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: High Current 12 to 24 VDC Voltage Doubler
My first thought, a voltage doubler, but you would need some pretty hefty components.
I still think the starter motor driving an alternator has some merit e.g. readily available used hardware. It's interesting that aircraft still use generators though, don't work well at all at low revs. With all the radios and navigation equipment sounds like a serious problem.
Roy
RE: High Current 12 to 24 VDC Voltage Doubler
The new planes have alternators, I fly a 1966, and that is by no means the oldest on the field.
Thanks!
RE: High Current 12 to 24 VDC Voltage Doubler
RE: High Current 12 to 24 VDC Voltage Doubler
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: High Current 12 to 24 VDC Voltage Doubler
No I just thought if you had one at the airport you would drag it out to the plane, or have it mounted on whatever runabout they use.
Is 24 Volts common for light aircraft?
Roy
RE: High Current 12 to 24 VDC Voltage Doubler
jump-starting. Use battery switches available
from any decent auto parts store.
OR
Swap out the alternator regulator for a 24v
version, and add a second identical battery
in line with the original.
<als>