Converting Plug In Power Tools To Run On Batteries
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- Опубліковано 1 січ 2021
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It will run without the cap it is only there for noise suppression, most power tools(with universal motors) will run on DC appiled straight to the plug but the ones with triac speed controllers wont work it will be either full speed or off, hope this helps.
@James this is another type of motor, does not need startup cap
The capacitor is only there for suppression, to prevent noise from the motor.
This can be very useful for certain requirements. One heads up I will give anyone experimenting with this is to be careful reusing original switches intended for AC as DC can be a bit brutal when it comes to switch contacts.
You have good fun exploring these ideas, thanks for sharing
Very helpful, I used this video multiple times while iv been working on my DIY weed trimmer and my DIY trolling motor for my canoe! Keep it up guy!
Does it have enough power to do anything
LOL, Rob, you're making it absolutely IMPOSSIBLE to throw anything out, anymore!! Now whenever I look at something that's no longer working properly or that I've replaced or no longer need and I think, "well, MAYBE I can turn that into something else..." I need a bigger house, or a new storage shed!! 😋😋😋
I tried this but found that when any resistance us applied to the chuck the current went up significantly had to increese volage but it got laborious
Funny coincidence that you presented this today. I was using a 240v device (magnetising yoke for ndt) on a job last night at a local power station (ironically) that I had running off battery power through an inverter thus avoiding the hassle of finding outlets and running leads safely.
You might try connecting the armature in parallel rather than series as is usually the case with AC universal motors.
This is great!
thank you.
very cool, i was searching on how to make an electric scooter and looking up what motors i can salvage from other products, and it looks like people have had success turning a drill into a motor for an electric scooter which i thought was cool. wish this type of information was taught to me earlier on in life, thanks for sharing, it's always good to see the abundance in the world through understanding and application
@@realfamilyman it was probably a battery drill in that situation
Great idea Robert. Just thinking (thats dangerous for me 😉 ) so this may well be a bit of a daft idea but here goes.... I wonder would it be possible to make either some very high power “battery belt” with a 3 pin socket to plug your tools into or a large (but as light as possible battery back pack) with the same idea so that you could power any number of tools for quite a long time (hopefully).
Would it also be possible to have the various tools hooked up with a sprung loaded power lead so that the lead would always stay taught while you’re using the tool/s.
Thanks again 😊 👍 - Jonathan from South Wales 🏴
Another great vid Robert great content 👍
The first time I did that was back in the 1960's while camping, I needed to drill some holes. Nowadays the drill switches are SCR's and they don't work well ( if at all) with DC. So find a real off and on switch and use 4 or 5 batteries 60+ volts and it'll have plenty of power. Brought back at lot of good memories, thanks Rob.
are get a cheap boost converter
Thanks Robert for this kind reminder!
My project on hold may be slightly different, but kind of similar. And it should be continued soon:
I started reviving my old Bosch NiCd battery drill by finally replacing the broken, poisonous NiCd batteries with reclaimed (tested and self selected) 2.6Ah Li-Ion battery cells from old, retired notebook batteries.
Three in series do the job pretty well. I'm planning two strings of these in parallel in order to get some capacity for working independent from the mains. The drill has no friction clutch yet, but a working light as accessory already. But hey, for screwing I do have two other modern battery screwer-drills yet. Having an extra drill for, well, drilling anyplace offgrid would come quite handy.
But as a saying goes: The first 90% takes 10% of the effort, the last 10% take the remaining 90% effort. 😉
Means, it works in laboratory scale, fastened and wired externally *somehow*. But rebuilding a working battery compartment sends me brooding ever since.
New year, new attempt. Let's go, lazy me! 😜
I was wondering about making a projector screen motor with slow enough turn speed and I think you just fixed that idea for me!
Great info and love watching you have a great time discovering it. I need to covert a portable led 150W, 365nm light for my business.
Robert did you try to wire it to the plug directly?
I have an ooold pipe threader that I would love to run on battery power.
It would be easier to get a cheap 12v inverter. A universal motor as fitted to most AC power tools would be quite happy on a modified sine wave version. Full power and torque on 1 car battery.
Yes but this is not about the ends.... It's about the means, ideas, inspiration. and creativity
Oh damn it Rob.. In all of my 68 years I would have never thought to try that! Brilliant..makes me feel a bit slow.. ;-)
Very cool, I have done this to a few motors. They are universal motors after all
You bet! In my experience you have to run it on slightly less DC voltage then original AC voltage,, so if it was 120v AC you need about 90V DC. My favorite conversion are AC lawnmowers to DC 🙂
And (in theory) 90V is enough to kill you.
@@ColinWatters depends on what kind of current that 90v is pushing
Great Idea! Thanks for showing this. I never expect that it's possible to run an AC motor on DC.
As long as it's a universal motor, they'll operate on either. In a sense, that type of motor is already a DC motor but modified to run off AC power. Think of it as a DC motor designed so that regardless of which way current is flowing through the coils the mechanical rotation will only go in one direction instead of forward/reverse.
Watched the video. Then got to thinking about converting tools to 12v when there’s no 240v about in an off grid situation. Is there a way of converting a storage heater to work via 12v. I realize that it would not be up to it’s full temp but got to thinking about it ?
Thanks for the information,
I appreciate
My regards.
Interesting. I wonder what the capacitor is doing? I saw a fellow once, who measured torque by securing the motor and attaching a foot long lever to the shaft. The other end of the lever rested on a scale. Very simple way to measure Ft-lbs, or other units of measurement. I've wanted to try it ever since. :)
I did a similar thing back in the 80s with an old hi-fi (stereo system), removed the transformer and connected it to a car battery. All work lol including the record player
I've tried this on some old universal motors from some fans (so not such high-power motors as vacuum cleaners and power tools). The only way I could get it to spin quickly enough was to parallel the windings instead of leaving them in series. At such low voltages I'd expect even if you paralleled everything you'd still be way under-driving it anyway, and it's quite an easy mod to do.
Hi, can i use this method for a "dolphin massager" ?
Would it be possible to convert my 8V rechargable battery Ryobi drill to a drill with a power cord that I can plug into an outlet?
I also just noticed that drills are a good source of scavengable barings lol. I agree with some of the other cats that an inverter would save it from power loss, though based on watts needed the inverter might end up too large to be readily portable.
Does it needs to convert AC to DC ? Aslo will motor work on 24 volt when it needs 220 volt?
I'm looking for something exactly the opposite. A battery powered impact wrench to a Plug in power mechanism. Any suggestion would be really helpful!
I would argue that carrying around two car batteries and a set of jumper cables every time you want to drill something is significantly less convenient than just being plugged in to the wall.
I learned more about electric motors here than in 5 years of college.
So why take out the switch? Will it not handle the DC?
Could it be done the other way round ie. converting a battery tool to run off mains. Usefull if your battery runs out and you dont want to wait for it to charge up.
I gutted a Black and Decker 18 volt battery and wired in a laptop power supply. Now I can swap out a discharged battery pack for one that runs on household current. Only problem I've had is the drill bogging down on low speed starts. Have to start high speed and then back off.
@@loaderman213 Nice. I maight have a go with my dewalt battery. I have a few knackered ones.
I've converted my battery powered tools to wired tools. Saves tons of money.
How about putting in a parallel wiring system for the DC power, a switch in the base to flip between the AC and DC operation and making a battery hookup with a compatible plug in to what is on the tool to begin with? That way you can use it for both AC and DC.
It's an interesting approach.
I'd be interested to know what you get in the way of torque; you're clearly running slow, but that isn't necessarily a problem - slow drilling is key to drilling hard materials with normal tools, far too many people try to drill metals way too fast. A pair of car batteries should be able to deliver enough amps to utterly fry the motor, power delivery shouldn't be an issue. Can you try chucking up a biggish (say 10-12mm), sharp, metal drill and drilling into some heavy steel, with no pilot hole?
Nice.
A few comments :
There probably is not a negative and positive wire from electronics to motor. I suspect there is some phase cutting electronics in that bit of plastic with a triac as switching element. Much like any dimmer circuit. Out comes an AC voltage with reduced effective voltage.
The capacitor is there to reduce emission. Without it it might distort other devices on the mains voltage and radiated as well so it could be heard on a nearby radio. It will work without capacitor with mentioned consequences.
This kind of motor is not unlike the vacuum cleaner motor. When run from DC voltage it does not make much difference for the rotor windings as the commutator makes sure there is an AC voltage on those anyway with a higher frequency than the mains voltage. But current in the rotor windings will be way less due to lower voltage.
For the stator windings it's completely different. On AC voltage their impedance will be way higher than on DC. Meaning on DC current will be much higher with the same voltage applied. With 24V DC current still might be higher than on mains AC.
To recap, when working on 24V, stator current might be to high, rotor current will be way to low. Given this it might not be possible to find the optimal DC voltage where it will perform like on mains AC without the stator windings burning out.
Uh oh I read the other comments and learned brushes connections and stator windings might be placed in series. That's probably true in which case it would be possibe to find the optimal DC voltage where it will perform like on mains. However when the drill is blocked current will go through the roof and windings would probably burn where on AC mains that would not be the case.
Is there some reason you can't just put some battery clips/clamps on a power strip, clamp them to the battery and plug the appliance in the strip?
Yea some of the switches use the trigger as a threshold sensor, harder you press more it speeds up etc, done with triacs/ scrs which you want gone on a DC supply. if it's just a switch your idea should work just as well.
I actually built a smallish 120v battery I don't have any protections or great way to charge it but it works fine with brushed motors
What no multimeter? ;-) What was the Amp draw with no load vs under load?
I'm doing something similar to this but I'm replacing the stator coils with strong magnets
was there a bridge rectifier in the switch area?,
If not then surely you could just try connecting DC to the exposed plug prongs without taking the thing apart.!!
so, using the built in cap and putting in line 20 batteries to reach 240 dc would the tool reach its full power and lifetime again?
240V DC sounds a bit deadly. :)
@@zylascope yeah, purely academic question
Will this type of motor spin fast enough with sufficient torque on 24 volts
Probably not, torque is a function of the current, which itself will be limited by the voltage. Running it at 24VDC isn't really much different than running on a basic phase chopping speed controller at a low setting.
A universal motor will run on DC but it needs to be similiar in voltage to have the same power.
I'm working on converting an angle grinder to 12v brusheless dc, by rewinding the stator and replacing the rotor windings/brushes with permanent magnets. I have found ZERO videos on others that have done this.
What about a tutorial on making an 18650 pack that would power it to the same performance as when it's plugged into the mains ? Is that possible ?
Yes very possible. Usually takes about 6 x 18650 batteries
wow great idea. Nothing to do with this really but I am seeing advertised on a shopping channel a clothes dryer using what seems to be a ducted fan blowing fresh air through the tubes around the clothes using 30 watts of power for £60.00 wondering if you could produce something similar a bit cheaper.? On Amazon, high street tv, nu breeze
just use an inverter no need to do anything to the tool still all the power and torque of 240v
Expensive and when the 5th wave arrives we all will need to be tested sorry rob but i had to say
@@markhodgson2348 what 5th wave?
@@dantronics1682 infection from the filthy heart breakingly sadness of the world of physic disease
The problem with inverters is that they're expensive especially one with a high enough output wattage. If you have the batteries anyway (because obviously they're not cheap new either) then being able to run directly from DC is useful. If you want increased torque then a DC to DC boost converter could well be enough to up the voltage to get that.
I would be interested to see a way to make an inverter using reclaimed components though
@@realfamilyman oh it's definitely good to understand things yeah. But inverters really aren't that cheap here, much more rarely used I suppose, so finding them second hand isn't common either. The UK is much smaller and more densely populated for one thing, so the demand for off grid equipment isn't nearly as high, also electronics in general just cost more here than the US. Some countries the problem would be even greater.
It also depends what you consider to be expensive :) But yeah if you can find a decent second hand one then that would be a good option
thanks for sharing intell before battery tools were use full i used a power inverter and battery in an utility trailer pulling and zee yard ,heck i still do if needed..a say 25 lb inverter and diy battery set-up be a fun build with graphine lead acid battery build
happy new year Rob! very cool indeed, but i'd actually be really interested in a good solution for the opposite. power tool batteries are pretty expensive and obviously limited in capacity and lifespan. i'd really like a cord adapter for battery tools for times you have access to a plug, and i'm really surprised that no companies have developed this. although i suspect its because a high Amp transformer is pretty big and bulky, and if the transformer is at the outlet then very heavy cables would be needed. not sure though, and i've always thought it would be really useful.
Try using a battery charger (for 12 volt tools!)
use a switch-mode power supply, heaps of them on banggood alibaba etc for a few dollars, high current and quite light weight
@@longwhitecloud Great idea!
.....maybe,, so looks like a standard 18 volts is being adopted by manufacturers . At ten amps it's ideally 180watts but I'm sure some of the tools are more like 360 watts requiring twenty amps . Just thinking the laptop little power supplies can be rated up to six amps at around that voltage . They get thrown out when laptops die . Obtaining two of them and connecting outputs in parallel m perhaps ( there's a vague memory cautioning against connecting switchmodes in parallel , it depends though , not insurmountable )
@@charlesdickens6706 Good point
Just used this trick to use a grinder on a dredge
So, are all small motors, universal motors nowadays and if so, how can one tell apart from wiring them up to batteries?
some are brushless/induction motors or shaded pole, you can usually tell by the lack of carbon brushes, and slotted ring on which they ride.
some synchronous motors use a dc electomagnet instead of a permanent magnet, in which case the rotor would have a pair of slip rings which are not slotted.
@@satibel Thanks mate
You can just connect the dc to the cord without modification as long as the tool doesn't have a speed controller because triac based speed controllers only work with ac.
Wait this is exactly what I'm interested. And how to many battery power equipment run on a plug.
If so, then can it becomes a generator for a wind turbine?
If the motor has permanent magnet in it. Usually it doesn't have permanent.... You may need to add your own magnet to generate electricity with the drill motor.
I need it the other way around..
That's a VERY interesting point!! I wonder why we don't see power adapters that fit into cordless drills, so that you can use them as a corded tool when your batteries are dead as opposed to waiting to recharge? I suspect it probably has something to do with the inrush current, which batteries can handle well but would fry a standard power supply. But with a little bit of smart circuitry, I would think that could easily be dealt with - basically, go through a series of step-up voltages to spin up the motor. Or - even more simply - maybe just the right arrangement of capacitors. Hmmm, that seems to be a product idea waiting to happen!!
Did a bit of browsing on UA-cam, and found someone who was using just a standard transformer and bridge rectifier to power their DC drill. Not sure what size transformer would suffice, but looking like yet another potential use for those microwave transformers Rob is always championing!! 😋 Would then just need to add some over-voltage and over-current protection, etc.
@@NorthernKitty thinking of what you said of using microwave transformer.👍
Interesting . But I’d probably put a 7.5ah battery and a cheap small inverter in a hobby box and mount a slim 240 socket , with dc charge socket on outside and plug drill in where I need it. Just an idea. Nice video thanks
I'm pretty ignorant of what I'm about to suggest, maybe someone can inform me. Would it be less difficult to wire up an outlet receptacle to the battery bank instead? Then all of the plug-in tools could just be plugged into the rigged outlet?
So you don't need to pull it apart just power it by DC problem solved?
Make a vedio on carbon fiber tape
Back of the Net!
Can someone translate “sounder?” What is this device?
Sander? It's using sandpaper on a vibrating plate.
Electromechanical device used for sanding
....as long as there's no ferrets in that squirrel cage then it's all good .
yes but aren't you limiting the power to the device in this way?
All you removed was the switch? Couldn't just just leave it in the on position?
Milwaukee power tools are designed to run on AC or DC power
The ability to run fridges and freezers from battery power would be especially useful in emergency situations like natural disasters. Not sure how the motors inside those compressors are arranged might have to investigate that! Of course if you know advance you can buy such devices...
I've done the opposite. the battery for my drill died so I rigged it up to a car battery charger 😂
I've used an old rechargeable 'cordless' drill by hooking it up to my car battery once... ~( 'w')/
I've done that years ago when I was skint. It ought to run almost forever on one charge.
I've converted several old tools to run on car batteries.
Morning 558 am Sunday here. Pickup a Samsung smart TV for free. Fix it in less than 10 minutes. The throw away world hey. 55 in to the shed it goes.
Yep your right about that, they must have switch from 1080P to 4K so they can see anchors person blackheads and face stubble, just use it as a unconnected monitor unless the manufacturer is still providing update.👍
You probably know you're very smart and so you're great at these youtube , but did you know you also have a lovely voice? Very easy listening:)
CONCEPT ! / IDEA ! @pDLE
These are known as universal motors. They work on AC or DC
Increase voltage...increase speed and drop amps...just a thought.
Have you seen the welding backpacks used in building the new Russian amphibious tank? I think it's called the kurganets, the device is quite steam punk in appearance and very impressive considering the gauges of metal used + the battery!:)
I'm going to do the opposite. I'm not paying for new craftsman batteries for my set. So I'm going to convert the battery by putting a high power transformer in the battery case. Then I can use my tools again.
Have you considered puting in new batteries a lot of videos on it. Some people have increased the torque by doing so. Just an idea
...can also choose option of buying cheaper battery packs of cheaper brands and having an adaptor .
I just did this. Works with an old computer power supply. It doesn't work with my battery powered circular saw though. I think it has something to do with speed controller in the trigger of the drill vs. the on/off trigger on the saw.
Ok, i'm slow.. I don't get it?? YOU still need a cord between the 2 car batteries and the tool? so you still have a "CORD"
If this was done with (6) or so 18650 batteries than I can see how that would be helpful to convert tools over..
But this would only be useful I guess if you had to go out into the fields or somewhere , where there was NO electricity .. and for the price of car batteries with amps.. I'd spend $ on a solar powered generator IMO.. for 300 when on sale.. and be able to power all my tools without converting them.. .. Just my thoughts..
Using a buck converter would be more efficient than using an inverter, so much power is wasted with inverters
@@realfamilyman the power loss is using it, anytime you step up voltage you lose current,in this case times 10, for each 10 amps in you get 1 amp out, that's 90%power loss
That wasn't a conversion at all. A bit interesting yes, but not very useful really.
So Nice 💘💘💘💘💘💘