Step 4. Came across this while doing some research for induction motors as generators, the basic idea is to match your rpm so that your value of slip goes from positive to negative. "can this energy be stored in a battery" Yes.I would suggest a bridge rectifier whether you spin this in either just one or both directions because it will also functions as a blocking diode to prevent your batter from discharging into the motor. To get any. How do I calculate the regulation of the generator in a Ward-Leonard system? on Introduction. 7 years ago, The trouble with "fans" as generators is that you have to spin them slightly faster than they would have spun as motors, and they lack magnetic field to generate with, unless you add some external capacitors. Now, you will be left with only two terminals from the rectifier.These two terminals are for the DC output. The same principles apply for a large and small generator. So that was all for this instructable guys. instead of rotating it can we use a shaft and rotate the gear WHILE WALKING, Reply But if you want to know what speed a generator/motor will be sure to operate at, look at what it was designed for. You can tell if your electric motor is a permanent magnet motor or not by spinning the shaft of the motor with your fingers. Actually, you'd probably end up having to spin it at about 5000 to 5300 rpm to achieve 1.5V (coil resistance & mechanical drag losses work against you both when using it as a motor & as a generator, so there's a significant rpm overlap), but your basic premise is correct there. Result of constant current through DC motor under different loads. 3 years ago. A good rule of thumb for a useful, compact generator is to choose an engine in the range of 5 to 10 horsepower. rev 2020.11.24.38066, Sorry, we no longer support Internet Explorer, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, a series wound motor has no back-emf limited top speed, and you have to exceed the top speed (for the voltage desired) to get power out of a generator, so without modification a series wound motor will never generate electricity. Make sure that the shaft of your gasoline engine is set so that it will be parallel with the shaft of your permanent magnet electric motor when it is mounted to the platform. Acquire an engine. Do not touch the wires that originally fed power into the motor as these wires will now be charged with DC current. Use your jigsaw to elongate the holes into slots that are no wider than the holes you drilled. Set the electric motor aside. sir you mean anything dc motors can produce electricity by rotating the axle on it if this true i uses small dc motor found on most.appliances and all i have to do is to rotate the rotor of it, so i use a magnet to produces magnetism in the axle of the dynamo outside part of it and lets say it will continue to rotate in the terminal of the dynamo I'llput led either 1.5 volts will it light up and if will, is it AC or DC, Question Why do new engines have a case with a triangular tiling pattern? 3-foot by 3-foot sheet of 3/4 inch plywood, 8 - 1 1/2-bolts with nuts and lock washers. ASSEMBLE everything back as before excluding the PCB. At running blowing speed the induction motor develops its maximum  torque just as the fan needs that torque. Sorry MAD Sci robot,  But a universal motor would be way too noisy. Say slip is 3%, then the rpm must spin faster then the synchronous speed so that slip become -3%. By creating an account you agree to the Hunker. How to make a simple manual gengerator that can produce a 9 volts of electricity? this is for my EE experiment only! Your electric motor generator will need to be spun slightly faster than a unit specifically designed as a generator, but there is little difference between a permanent magnet electric motor and a generator. Step 1 Mount alternator to 1/2-inch plywood sheet with 1/4-inch steel lag bolts. You now have a very sturdy platform on which to mount your permanent magnet electric motor and your small gasoline engine. The DC motor is a ready made generator that will generate electricity. If it's a "series wound" DC motor, I don't think it will generate unless part of the motor chassis is residually magnetised. How to make an Android app "forget" that it installed on my phone before? Hello sir...how can we calculate the voltage produced by the DC motor at a specific rpm...or torque applied? Participated in the Electronics Tips and Tricks. Drill mounting holes and use four of your 1 1/2-inch bolts (with nuts and lock washers) to secure your gas engine to your platform. 16K would be WAAY too fast.Its really a bit "suck it and see" - there are plenty of videos under"Ceiling fan alternator" which should help you. I've seen many brushless DC motors for, say, high-end R/C motlrs & most computer fans; not sure I've ever come across a brushed, non PM though (well, except in high-school shop class). Produce-Electricity-from-a-DC-Motor. However If you separate the wiring from the case electromagnets and the rotor or commutator electromagnets you may be able to input power into the case electromagnets, spin the motor and produce additional energy out of the rotor electromagnets, in essence how a alternator works. If I see a motor that says 1.5V and 4700 RPM, does that mean that if I do reach 4700RPM, the max voltage that can be output is 1.5V? The slots should be perpendicular to the shaft of the gasoline motor that is mounted to the platform. Good morning Sir, please I want to know can I generate 3.5KVA out put with a DC motor? Spin it very fast (you may need to use belts and pulleys) and 2.) Thanks for your efforts and full speed ahead on some more ibles. That style of motor (only two terminals connecting to two windings and no permanent magnets) is generally not appropriate for generation because you have no guarantee it will do anything, and no good way to control the generated power/load. Rather, we'll build a small experimental generator. To show that I dismantled a damaged HP printer and take the DC motor th… If i turn it 78 rpm how many amps do i make?yes i asked a smart question lol. The wattage of the motor depends on what you want to power. After doing that, you have to open up all the important parts as shown. In the pics, you can see that I have used a rectifier to convert the output three phase AC from the brushless generator into DC. SUBSCRIBE - https://goo.gl/gIb28VTop 30 projects - https://goo.gl/yxiujO, Buy Online - https://goo.gl/x96oj3, Pinterest - https://goo.gl/8ma92N. Every ible has some positive about it. To describe an invariant trivector in dimension 8 geometrically, Don't expect much power output from just putting a propeller on a motor shaft. thanks for the heads up about the tutorials, I'll try them out and i'll ask you again for help if i get stuck somewhere.thanks again!