Converting A Universal Motor ( Washing Machine, Drill, Saw ) To Generate

[Music] Heights so we're having another windy day which means the door is rattling and it also means that my mind is still a wind turbines in a previous video we met this thing I meant this thing out of a car fam it's a wind turbine obviously now on the comments somebody said how would you do that with the washing machine and I thought that was a really cool idea because I'm washing machine has got something in it called the universal motor I used to think universal motor meant there everywhere and the kind of does cuz there are everywhere but it also means that they'll run on AC or DC and you can do that just by connecting up on universal motors of DC and seeing it run they're normally about some 110 to 30 volts depending on the country so they don't run particularly quickly will you stick about 30 volts DC and you'll get the motor to run so there we go 23 volts it starts to turn we're at 30 volts now apparently that's why they're called universal motors however the other idea of them them being everywhere also holds true you will find them in everything drills jigsaws mixers washing machines they're just about everywhere so I'm going to do a jigsaw because I have have on here but I also have a broken one and I'm gonna do the jigsaw because the modulus in the jigsaw is identical to the motor and all those other bits of equipment are you doing exactly the same thing so there's the top front off of it there's the on/off switch right there that's the start capacitor here's the lead coming in that's the motor stator that's the rotor here you can see the commutator and the brushes there's the brushes there's commutator there's the bearing the rear bearing here that's a fan the front bearing is here and then it's connected through a worm to this cog here that cog has a peg going on to it that's connected to this bit of metal just that that's called a scotch yoke and what that does is turn the reciprocating motion into an up-and-down motion which obviously is how your jigsaw works I've sewn up the jigsaw and you can see I've just taken this section out of so on everything else out to give me the jigsaw bit because I want to put the motor back in there because it's a molded case and the motor fits in there with the brushes and everything and I won't get back so I just sawed out the body taken it apart and here is the guts of a universal motor that's what they always look like so they've got a rotor which is why around with a compact commutator and they've got a stator then the stet is a couple of coils and you'll see two wires going in two wires going in those two coils and then sometimes like this one they're wired directly to the brushes that feed the commutator now we can make these into generators by using the same ideas that you would do when you have an alternator now in an alternate and use slip rings to make the rod rotor one great big magnet so the slip rings feet plus and minus continually creating a massive magnet that rotates and inside the coils and those calls become AC bill we can swap that over we can just feed that current into here and then get this to rotate and this will generate a city through the brushes if we fill feed a decent current into this then obviously it matters which way around the goal because that needs to be north and that needs to be south and they have to stay constantly north and south while this thing spins in though but it's not too difficult and handily enough we have a couple of wires coloured black and blue which is a bit awesome and you want to snip those off somewhere sensible because we do want the brushes remember they're going to be the collection point for the AC generation so if I snip those off and strip them back and then we're looking for something to strip it with which I can't see for the life in me there it is and if we put a DC power supply down that we have effectively an electromagnet now as I said these were originally wound from 110 to 40 volts so the wires are quite fine so low voltages aren't going to be particularly onerous or dangerous it'll take a bit of going actually to get a low voltage through it what I'm going to do is I'm going to attach a battery to each of these and I've got a compass and I'm hoping that's gonna tell me which way around they are depending on how I connect these up so let's get some clips on there plus - stick the - in that and while dealing with that one at the moment and stick the horse on and we should get DBS in the compass and lo and behold okay that way around I'm getting a north if I swap them yep that way around I'm getting a south so if I connect the positive to blue and the negative to black I get a South so let's try this one put the negative to blue this time and the positive to black remember we've got a South Pole on here so we're on to North Pole on here sass ball so swap them over rough Bowl awesome so it looks like if we just connect those together and those together we'll get the right orientation so we need to connect those two together so they're an extra wire on so it can come out of the case put a current in there and we'll have our electromagnet so that's exactly what I'm gonna do okay so here it is reassembled the stator here has been wired of to be an electromagnet and those are the black and red wires so I'm going to feed a DC current down there and then the two brushes have been wired soldered to the two white wires because that's our AC pickup so what we've basically done is transformed that Universal motor into effectively an alternator so now all I need to do is close it up put some voltage on and see if it works okay so I've attached a drill give me a bit of power and I've got the leads attached to the AC reading on there see reading and if I spin this I will get a voltage it's tiny the reason for that is the electromagnet that we set up there has some residual magnetism that residual magnetism is causing a current when we spin the coil in it now if we connect it to a battery then we are in fact energizing that electromagnet that we made and we get a higher current out of it considerably higher actually it was point zero three of a bonk without the battery in point four of a volt with the battery I mean we are putting a six volt battery on there so we're not going to get an awful lot out of it considering this was meant for 230 volts however the first thing that comes to mind is big whoop it's not really the how impressive is it but if we take something else and this is a rectifier so if we take the rectifier and connect it to our AC output the check which runs the AC notice then if we were passing in a see down here we would get DC back outs so we could connect that up to the DC supply for the field coils now it won't quite work yet we need to give it something to kick it off some kind of energy store now you can use a battery you can use a capacitor I could super capacitor here it's two point seven volts at 500 farad's so though it's got a deal of energy the voltage isn't very high so again we're not going to get a very high voltage but if you have a capacitor there at say 50 volts at ten thousand microfarads that's going to be an ideal one this is just to demonstrate it really and if we connect the capacitor in there we need to put an initial charge on the capacitor once you have an initial charge on the capacitor then that capacitor will feed the field coil and that will set up a alternating current within the rotor and that will self-perpetuate depending on the speed of the input so I put a little bit of charge on here not enough to actually hurt but enough that and what you actually see with that is the voltage gradually going up as that capacitor becomes charged and then feeds back into the field coil the strength of the field gets bigger because the strength of the field is increasing the rotation is the same we get more output and so we get a circular thing happening where this builds up into his output power to the limit of the super capacitor so anyway that's how you go about converting a universal motor into an alternative style generator and also how you would get the alternator style generator to generate all by itself you do need a kickstart with something like a capacitor or a battery but you just need to kick-start it first I mean I've connected the capacitor you can actually just connect the battery flip a switch get it going flip the switch off something along those lines but that's how to get that working anyway the same principles apply for this thing as much as a washing machine motor or a drill motor or any of these universal motors that's what you do with it and that's how you turn it into a generator I thought I would share that with you because specifically I was asked to I hope it was a been twisting thank you very much for watching

Channel: Robert Murray-Smith

Views: 30,312

Rating: 4.8497815 out of 5

Keywords: fwg, robert, murray-smith, power, energy, electricity, generation, motor, diy, d-i-y, off grid, alternative, technology, generator, green

Id: rQhD7hLTipI

Length: 11min 32sec (692 seconds)

Published: Mon May 11 2020