Run stepper motor with Capacitor | No driver | No controller

[@Electrotech1980]

what you have is an AC synchronous motor. At 60 Hz it turns at 72 RPM and starts and stops within 5 deg of shaft rotation. The capacitor needs to be an AC capacitor and chosen to give roughly 90 deg phase shift between the windings. SloSyn made 120V versions of these. You can count the waves of the AC line to position the system or use an encoder. It's just a stepper motor with 120V windings. Nice experiment. You might consider 2 back to back capacitors and 2 diodes.

[@justin_704]

sorry can you explain this more? I am not an electrical engineer and have little knowledge on motors and their wirings. Can you explain more in layman's terms?

[@commenter4799]

​@justin_704 I wouldn't call this a synchronous AC motor because this has permanent magnets, whereas an AC motor doesn't. What the other guy is saying is the speed of the motor is dependent on frequency and this isn't how this motor is designed to work. A stepper motor has windings on the stator (non-moving part) and running current through them produces a magnetic field that acts on the permanent magnets in the rotor. Like poles are repelled and opposite poles attract. One "step" is when current is run in the windings and the magnets move to states of equilibrium. To make it keep turning, the coils must be switched once per step. In a capacitor, current leads voltage by 90 degrees, thus, if you were to measure voltage and current, you'd see the sine waves shift so they were no longer in sync. This is why the different coils are powered at different times. I'd have to see a schematic to really know what's going on across the windings, but I'm guessing this isn't running very efficiently.

[@turanamo]

@@commenter4799 "In a capacitor, current leads voltage by 90 degrees, thus, if you were to measure voltage and current, you'd see the sine waves shift so they were no longer in sync." Did not follow your commentary. The output is d/c. So there are no sine waves here where the capacitor is connected. It just filters out the residual a/c component further?

[@commenter4799]

@turanamo the output wouldn't be DC because the capacitor is across a winding, not the transformer. If it were, a single capacitor would make for a really bad low pass filter, but since there is no DC offset, it would just add an unnecessary reactive component. You really need a diode to get DC. The originated comment said you should put the voltage and current 90 degrees out of phase, but that would remove all real power, and no work would be done. This seems to be putting the two windings in series and a cap across one winding. The inductance of the windings and capacitance of the cap must be shifting the two windings out of phase enough to work, but it's a weird setup.

[@turanamo]

@@commenter4799 thanks for the explanation

[@amaurycarneiro2626]

Congratulations. How do you control the speed, increase or decrease?

[@kongmeurn38]

You can't unless you have a function generator though.😢

[@felixsantana5596]

Hola es un buen video el que hiciste, te lo digo porque las mayorías solo ponen el motor a correr y no prueban la fuerza, yo te pregunto, si se le pone un capacitor más fuerte el motor tiene más fuerza?

[@felixsantana5596]

Hello, what you made is a good video, I'm telling you because most people only run the motor and don't test the force. I ask you, if you put a stronger capacitor in it, will the motor have more force?

[@pauliexcluded1]

This is effectively an AC motor now. What you need is to pick a cap which will have 90 degrees phase shift between the coils. That will give you maximum torque.

[@christophersherratt7299]

I came across your website Looking for information about the stepper controller I thought it was the best I've come across Looking forward to seeing your others 😀👍

[@technicalsrk5253]

will it run with good torqe

[@Coolest-nerd]

do you need the the compacters

[@mas2ery]

where is the 18650 demonstration?

[@jonwuan4349]

Shouldn't you use back-to-back polarize caps for AC?

[@kongmeurn38]

It's not necessary tho

[@wallstreet497]

Would this work with a 9v battery instead of using a transfrormer ?

[@neumanngregor]

You converted a step motor in a normal motor, it works but it a waste of money, normal are cheaper and you use a step motor to precisely control the movement (CNC, 3D printers, scanners, printers, and a lot of other things)

[@brazcomz]

It's not a waste of money... just the opposite... cause you can reuse motors from printers (etc...) in other applications. By doing that you can save a lot... Believe me, cause I made machines for almost 20 years, Cheers.

[@neumanngregor]

@@brazcomz Reused yes they are worth, its a waste to not use them. 👍

[@Paint0nBrush]

By normal motor you mean "capacitor run ac induction motor"

[@parsonk4041]

All motors are normal 😅

[@neumanngregor]

To clarify, "normal motor" as it seems its a big issue is a simple DC Motor, and i refer as normal as it "it does not need a driver circuit" to starts spinning, direction controlled by polarity and speed by voltage, those are dirt cheap. Second a step motor can be made into a "normal motor" but from a "normal motor" you can't make a step motor (yes if you rebuild it but then is no reuse anymore). Chill folks

[@carvalhovisky]

Gostei muito, vai me ajudar nuns projetos que tenho. Daqui do Brasil seu seguidor manda um abraço.

[@NurzahanDolly]

Can i use it without step down trans former 😊

[@baburamabadhran1437]

how you decide teh cpacitor rating, you have any logic on it.

[@inventorkr1]

Gooood 🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹🌹

[@JjMn1000]

This works but NEVER apply reverse voltage to an electrolytic capacitor. You should use another capacitor like one for an air conditioner or something.

[@belielmascarenhas4399]

oi boa noite quanto de aperagem e poder ser terdaformado 12 v desde ja agradeco

[@egalejat4477]

Their Duo 🤪 Is Heart ❤️ Taking🤩 !! Your Ideas💡 And Concepts Are Amazing 😍 !! Never 🙅‍♂️ Disappointed with Your Videos 👍 😍😍❤️

[@sharadchitranshjohri4601]

The transformer is 5 volts. How many amp. is the transformer?

[@alwayscensored6871]

A F/R switch and this might make a power feed for a Mill table?

[@whatvideo3107]

My motor is 24vdc it has 3 wires How do I go about it Thank you

[@commenter4799]

That may be a PMDC motor with a tachometer or single direction encoder. You'd have to look up a datasheet to see how to drive it.

[@AmitSingh-zz3qm]

Sir, plzz make video battery management system,as laptop bms

[@soniyabegum3207]

Happy new year

[@ATdiy]

Happy new year. Thank you

[@YogeshSonawane-f8u]

Can we run it for long time?????

[@dolonsorkar3730]

Can we run the motor with DC current in same way ? please tell me .

[@sqrt2-88]

no

[@dolonsorkar3730]

Can we do this with DC current ?

[@OregonDARRYL]

No ...steppers need the polarity switched back and forth .. so it's AC or a controller...

[@jribeiro2564]

Olá eu tô montando um projeto para lavar placas um de passo _23 torque 19 kg consegue girar um disco de enceradeira ? Posso ligar um trafo de até quaros volt?

[@justtinkering6713]

It also work the same without the capacitor using only one winding, just two wires on AC. CAPACITOR ISN'T NEEDED.

[@sahinkatecnologyinvention4986]

How is it with the capacitor, doesn't it need to be a diode?

[@kaumysleyor6790]

The cap is feeding the 3rd leg of three phases

[@dolonsorkar3730]

এই মোটর একইভাবে কি DC current এ চালানো যায় বলবেন প্লিজ

[@jasonmare33]

is this possible with 12- 24 V DC power input?

[@scienceguide3880]

stepper motor only run on ac or “dc pulse signal”, u cant plug it direct on dc it will not spin and it just act like a electronmagnet lock rotor

[@kejeslipenga6696]

Can it work using battery instead of transformer?

[@markuslemerise5812]

just realized that its ac, not dc, battery is dc, so no it wouldnt work

[@netechbrand]

​@@markuslemerise5812 transformer converts ac to DC so I think you can use adapter also

[@commenter4799]

​@netechindia a transformer doesn't output DC without a rectifier. It only steps voltage up or down.

[@thomas1000official]

@@netechbrand transformer doesn't output DC without a rectifier. It only steps voltage up or down

[@arduinomaquinas]

Subscribed + like, big show 👏👏👏

[@ShahbazalipkAlu]

How to wind stepping moter

[@MattyEngland]

Big juicy siamese cats 👍

[@dozen6556]

Não entendi pra que serve eu acho que é pra mudar o lado que o motor gira ou para regular a corrente da tomada para o motor, e não entendi como funciona, mas gosto de assistir seus vídeos

[@pltspemula]

How to auto reverse turning?

[@AshvaniSingh-l9x]

Sir speed increase motor how please guide

[@mani5004]

por favor invítame a tu pueblo, soy de la India

[@takudzwanashetsvangiwa1357]

thanks but how to increase the speed

[@MohMedhat80]

Motor start to Vibrate and unsmooth rotate as soon as i apply Power to the two terminal and without connecting the capacitor, yest when i Connect the capacitor it rotates smoothly and yes it Reverse direction when i Connect capacitor to Other terminal but when disconnect it Motor Not stop

[@binazoon2724]

can i use phone charger with cap

[@drewrinker2071]

No phone charger would be 5v dc he is using ac voltage a perfect ac voltage transformer would be the type used for those toy Tesla coils and they are ac type transformer 5v, you could use the phone charger over it you could somehow delete the bridge rectifier but just make sure it's outputting 2 amp because I think this stepper motor would be pushing the max limit of a regular 1am or .5 amp phone charger

[@Wiipro2006]

Its Run in very slowly thats not Enough speed

[@Пушкин-л7п]

У меня нема 17 а как по цвету определить плюс и минус на проводе уменя как ужас двигатель.?

[@mushtaq_mesaqi]

Your one click can change my whole life.... God bless you...🙏🙏❤️🌹

[@brazcomz]

I real like to see your videos... Congratulations... ⭐⭐⭐⭐⭐

[@SC.243k]

Great 👍

[@ATdiy]

Thank you.

[@ritik4800]

@@ATdiy where are you from. please reply 🙏🙏🙏🙏🙏

[@Tužni-c4i]

Ja vam 💯% nevjerujem jer sam probao,vjerovatno vam je plaćeno da ljudi probaju pa da odustanu,no vrste se...

[@alimaker_3728]

Nice man

[@ATdiy]

Thank you.

[@ShahbazalipkAlu]

How to repair

[@pvsuryajaya1962]

Good idea, thanks for your inspiration

[@AD__OFFICIAL]

Please you can put new video how to make freez plate

[@Wade_Sabers]

Why the deceptive thumbnail?

[@youtubetv7000]

Super!

[@AshvaniSingh-l9x]

Motor run ok but rpm very slow

[@sergio5934]

Muito Obrigado!...

[@Misis1984Afzaal-gj1ps]

I like it

[@PiefacePete46]

It amazes me that nobody is concerned by the lazy, unprofessional way of connecting the mains power to the transformer... How many eleven year old experimenters are now going to think this is acceptable. If you are going to release videos like this, at least consider your WHOLE audience. At 120 volts someone might get an unpleasant surprise... at 220 volts, things could get a whole lot more serious! (Sometimes somebody has to say something unpopular and risk being branded "Safety Troll".)

[@mamidinaresh4053]

No diode

[@xiaomiphone9349]

And no transformers!

[@electronic7979]

Super 👏

[@zarezojo6903]

battery gone

[@kejeslipenga6696]

Can it work using battery instead of transformer?

[@markuslemerise5812]

no, u need a 5v power supply, they dont make 5v batteries but u could wire some aa batteries together to get close to 5v

[@commenter4799]

No, the issue isn't the voltage, to use DC you need a controller.