A short video demonstrating how to use a small battery operated (DC) motor as a generator. Also includes a method for determining the efficiency of a generator.
Another great video sir!!! Thank you so much for all the time and effort you put into your demonstrations. You have been a great influence on my journey to understand electrical components. The way you break down these electrical mysteries into simple concepts is nothing short of inspirational.
Motor-Generators were often used as phase converters; If you have only single phase electricity but need three-phase electricity to operate some equipment, you can use a single phase motor to drive a three-phase generator. It isn't very efficient but it's good enough and gets the job done! Now that high power electronics are cheap and easily available, phase converters are typically electronic instead of mechanical; and also a lot more efficient.
Great video. Though, I would like to add that if you have an inductive (or capacitive) element to the load, the current will not necessarily be in phase with the voltage, and measuring the power and efficiency needs to take power factor into account.
We are happy to support such videos. The electronics industry and especially the large electric motors require a lot of know-how. Such videos encourage the next generation of engineers to study the subject. We are currently building our own community on our channel. Anyone who wants to take part is cordially invited.
what if we made one motor run two or three generators , would the efficiency percentage add up ? assuming we can use brushless motors or other motors with no friction
You can do this with car alternators.. You can use a 1/3hp electric motor to run up to 3 alternators. The initial alternator not having much more power then feeding the motor but the other two can generate pure power. Most alternators need around 1/3hp to run up to max efficiency you need to pay close attention to the rpm and pulley ratio to maximize power used vs power output. The bigger the motor the more alternators you can run. Forget converting the alternators to a generator design. Just add a battery bank and use the batteries to run load and the alternators to charge them and the initial alternator to run the motor. This would give you a very usable perpetual generator system tied to a modern solar power system and provide indefinite power.. Add motors, alternators and batteries as needed to obtain kW generation needed. Under current technology and costs this video best illustrates the truth behind the motor driven motor untruth floating around. But that's not to say the concept can't be modified and used. You just need to find a more efficient way to generate power. Car alternators are very very good at this. Downside.. They have a short life span so cost for duration equaling cost per watt overtime is still not there. But modern electric car motors are jumping the bar ahead leap years. This tech will soon be around to make these systems work correctly..
I am wondering if you get more amps if you put some diodes in parallel at the output of the generator. Or maybe try a full bridge rectifier. Is the output of the generator in AC or DC.
Can you use a generator 38% bigger or 38%more generation rate to produce a higher power generation to feed back to the motor at 100%? Also instead of a depleating battery, can you use a solar charger that produces the same 1.5v? Or, perhaps can you experiment with a perpetual motion generator-motor-generator?
The perpetual motion setup won't work anyway regardless of the generated and consumed power because both motors will spin in the other direction if they would produce power to run.
supposing that the efficency is by 50 , does that mean the motor in generator mode recharging a battery takes twice the time that takes that motor to drain the same battery ?
I try the same scheme here, but I only get around 4% efficiency. not even close to 10% or 60% like you do. I used identically DC motor. what could be wrong? thanks.
yes because even slight differences in manufacturing and the connection can cause the value to change that you would get out of it and its important to know that you will not end up with the complete same output as your input. and since you are most likely to not have a datasheet that has everything precalculated you will have to.
every time i hear it, i just wanna break the laws... everybody talking about the stupid laws of thermodynamics, just look for a way around. make a generator that puts out more! make a more efficient motor! i understand the difficulties people but laws were made to be challenged. we just have to keep trying and at some point, somebody will go far enough or make just the right combination of stuff. there's so much we haven't learned yet, so much to explore and experiment with! fuck the laws
Motors are for work only. They produce more work than they consume in energy. Generators are for producing energy They produce far more energy than the work required to do so. Though they both function alike.they can not be used by n place of one another because a motor can not generate more energy than it can do work and a generator can not do more work than it can produce in energy. This is why you have to use a real generator with a real motor inorder to achieve over unity.
Instant thumbs down... @4:40 this is NOT correctly comparing input power V output power This is the mistake most noobs make and why i'm forever wading though crap...
you have to measure voltage and current of input and output at the same time to get the actual input power and output power. Other wise the voltage and current changes between readings as you add and remove your meters
