FREE POWER? Is it possable to get a 12 volt motor to turn a 24 volt generator.?
460675
We dont even have a machine with efficiency close to 1, you are talking of a machine of efficeincy 2 or more. What of the law of conservation of energy, and mass and momentum?\n\nI don't think it's possible, not in this universe within the limits of the known laws of Physics.
722546
I use a power inverter.
511307
well you need the power factor as well, From O/P KW to I/P KW by I/P KW = O/P KW / Efficiency; I/P KVA = I/P KW / power factor; I/P Current = I/P KVA / (V3 x 480); V3 is a 3 phase motor is used. so simple.
297080
Not sure I understand your question, but I think you could just parrelel it with your existing fan, instead of taking it off of the circuit board.  That is what I did when I added a duct booster fan to a long heat run in my house.  Those just have a fractional horsepower induction motor on them, so they dont take much electricity.
975955
generally pc work on 18 volts dc not 12 . they actually us e less than 12 volts . but for prop sake and etc . if you can tell the kind of pc you us e i can give you a digram of what to do . dc to dc is not a solution for your problem
914175
Depending on the size of the Battery. Find an electric motor that use the same voltage and connect an outside source to turn it. Motors work on the same principle as a generator (To be simple about this). If, you apply voltage to the motor it will turn, if, you turn the motor in some way; it produce voltage. You can test what I say with window fans. Take two and face them toward each other. Turn on on high and it will make the other fan turn. Take an AC volt meter and measure the voltage at the plug of the fan that being turned. The faster you can make the fan turn the better your output voltage. This work the same with a little electric motor for your generator. If, it run on 12 volts DC then it will output the same, if, it turned fast enough and actually charge a battery. Hope this enough to help.
13921
If you mean a 12 volt mobile radio like a ham rig, you should need a 12 volt DC power supply.  The antenna will need a ground plane.
468400
You need to mechanically generate motion to turn the shaft of the motor/generator at the speed specified on the name plate. Say 1800rpm for a induction motor would then generate the given voltage at 60Hz.\n\nIt is important to maintain this motion otherwise the frequency will vary.\nThe torque to maintain this motion is related to the load on the motor. So a 1 hp motor is about 746 watts. So for a 10kw turbin you will need a 2 x 15HP motor or 30HP motor due to a 50% efficiency factor for the maximum load. Most of the mechanical energy goes into heat.
442636
While you can convert HP to Watts, electric motors are also rated in HP.  A 5HP motor is pretty big, and won't use a normal wall outlet (15A, 120V).
865400
Get some power generators.
144848
You need a circuit called an inverter.  These are available to plug into your 12 V socket in your car.  However, use these with the engine running or you could easily drain your battery.
526693
Yes. The FIELD windings (not the armature windings) of a generator quite often can over heat and "short" together, thus reducing the capable out put under load, no mater how fast the armature is rotated.
132042
Don't plug it into the AC outlet. All the previous answers miss a vital thought. A garage door motor has to turn both clockwise and counterclockwise to raise and lower the door. It could be AC with two sets of windings, or it could be DC with a transformer and bridge rectifiers. I'm betting its AC, but I'm also betting it isnt a simple 120V single phase motor.
531796
You would need multiple alternators plus an inverter to accomplish this.  A common Delco GM alternator puts out 120A at 13.5-14V DC at an engine RMP above 3000.  You would have to put the DC through an RV inverter (for use camping where you hook up a battery bank and get AC out).  Assuming inverter efficiency of 85%, you would need 7475 (or more if e is less than 85%) DC watts.  You would need 5 alternators to power your inverter.  The problem is the inverter is VERY expensive, as in thousands of dollars.  \n\nThe problem with using a car alternator as an AC source is it is THREE PHASE.  I have had people disable the regulator and get high AC voltage out, but it is three phase.  You would have a difficult time clocking multiple auto alternators so the phases all matched, and then you would only have 3 phase voltage (probably less than 220V but 120V) and it wouldn't be regulated.\n\nFor 6500 watts you need a belt driven gen head.  See northern tool link to belt driven 25KW head.  Also look at their inverters for taking DC and making AC (yeah, I know--americans use 120 but I'm sure you could find a supplier to go to 240)\n\nBut dollar for dollar, you would spend more to fool around with DC alternators than just getting a gen head which was rated at the wattage and voltage with self-regulation.  ALSO you must REGULATE the RPM.  SO just hooking it to a car engine isn't going to work without a governor, which car engines don't have unless you preserve the cruise control option and hook up the speed sensor (which may give weird results at high engine RPM such as 3600 for 60HZ or 3000 RPM for 50Hz).  NOTE: my links are for 120VAC at 60Hz.  Europe will have different specs.
679769
I suggest you contact Stewart and Stevenson in Houston, Tx. They assemble a wide range of electrical generating systems.
145405
if the voltage rating of your motor is 460, you can really hook up to a 480 volts electric s=poer source. the maximum your motor can hanmdle is 460 = 10% of 460 whixh is 506 volts
1077558
The quick answer is no, if you could you'd have invented perpetual motion. \n\nIf the battery has a certain amount of stored energy, when it turns the motor some energy is lost (the motor will be about 80-90% efficient) with the same lost in the generator giving and approximate conversion of 60-80%.\n\nThe batteries themselves will also be inefficient in the charge discharge cycle, more so than the motor-generator combination although I haven't found a specific value. However, whenever you charge a battery it gets warm and this warmth is due to energy losses in the charge cycle. \n\nCoupled to all of these would be electrical losses in the wiring, but these would be minimal compared to the other losses.