Let say we have 24Volts DC motor, can it last for 20 minutes? without load
2006-11-24 14:45:27 · 6 answers · asked by dave 1 in Science & Mathematics ➔ Engineering
It depends entirely on the application for which the motor was designed.
Many very powerful motors (like the starter on your vehicle) are designed specifically to deliver maximum torque for very short periods of time. If you were to continuously crank this type of DC motor, it would burn out quite quickly.
Other motors (like the DC fuel pump motor or the winshield wiper motor in your vehicle) are designed to run reliably and continuously for hundreds of hours without any maintenance (these motors often outlast the vehicle.)
2006-11-24 15:14:23 · answer #1 · answered by LeAnne 7 · 0⤊ 0⤋
Some motors are designed for continuous duty and some are not. What kind of DC motor are you asking about?
In general, DC motors are made to be run with a load. It is not good for them to run without a load because they spin faster than they can handle. The centrifugal forces tear them apart. In particular, a series-wound DC motor self destructs rather quickly without a load.
2006-11-24 17:02:26 · answer #2 · answered by semdot 4 · 0⤊ 0⤋
DC motors are usually pretty reliable. Unless it's a very cheap motor it should run for about 10,000 hours or more unless it's in a corrosive location. The biggest problem is the inexpensive motors have bushings rather than bearings. The bushings wear out faster.
2006-11-24 14:54:18 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Everybody else told you about the motor, and they're mostly right except that maybe they're exaggerating a little about what will happen (e.g., "go up in smoke", "melt"). But NOTE! The wires you use can go up in smoke or melt if they aren't heavy enough (Don't ask me how I know!). On the other hand, I think they are misleading you about your solar panel. There is no such thing as a 12V panel. If your panel is labelled 12V, that almost certainly means that it was designed for charging a 12V battery. I have a "5W 12V" panel that I bought to experiment with. In full sun, it's open circuit voltage is 25V. When I hook it up to a battery, though, its output voltage is immediately forced to whatever the voltage of the battery was at the time. If the battery voltage was low, and I leave it in the sun all day, that voltage will (ever so slowly) rise. If you do not use a charge controller, then you may want to watch it, and disconnect the battery from the panel when the voltage gets up over 14V. A good rule of thumb for lead-acid batteries, B.T.W.: If you want them to last, then don't charge or discharge the battery in anything less than 10 hours. That is to say, if your battery is labelled 12Ah, then you really oughten't to draw any more than 1.2A from it, or charge it at more than 1.2A.
2016-03-29 08:09:26 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Easily, even with a load. With a load matched to the motor it could run indefinitely!
2006-11-24 14:47:37 · answer #5 · answered by Anonymous · 0⤊ 0⤋
heck yeah
some of them go for 100,000 hours I think
we only last like 800,000 or so at best
2006-11-24 14:47:47 · answer #6 · answered by kurticus1024 7 · 0⤊ 0⤋