30kW 50 Hz motor injecting 1050 Hz ripple

[freitasnetuno]

electrical engineering porn...

[freitasnetuno]

electrical engineering porn...

[freitasnetuno]

electrical engineering porn...

[ACA332]

REALLY cool concept, although I can't help but wonder why they don't just control their street lights with photo cells :P

Thanks for the vid!

[RODALCO2007]

@ACA332 Most streetlights are controlled with photo cells and contactors.

[otrab1080]

Are those clicks in the motor inverting the 1050Hz sine wave for on and off?

[LaterMeansBrick]

Good thing they don't use these things in my country. They are using automated radio-synchronized electronic clocks next to your electric counter. And as for the streetlights they use a clock system or photosensors. Maybe because of different regulations and norm system for the electric grid.

Nice sound by the way. Never knew there was such thing as a 1050 Hz ripple system. Thanks for sharing.

[underverser]

Also your airconditioning will make these sounds when the ripples are fed into the grid... ;)

[thunderboltman100]

jego głośny its loud

[NBHKILLSwitch]

we have ripple plants in our subs in nz, but there run from tunning coils and transformers. that sounds so familiar but way more intense here. Like

[RODALCO2007]

@NBHKILLSwitch In the city they are solid state, in the suburbs they are motor gen. sets with tuning coils and capacitors.

[RediffusionMusic]

@RODALCO2007 Capacitors are scary, small or big.

[HorizonDelta]

Motors are Kool !!!

[tzarapper]

did it change the RPM?

[cyrax622]

can anybody explain me why this motor drives on a 1050 Hz current? :S

and is that a generator what its attached to? and what does it need that high frequency, or is it just for fast rpm

and whats its purpose

I'm in electric technology school, and I'm interested in it

so i would appreciate any help about this, cause i have no clue what this does

i thought that ac/dc conversion isn't done mechanically...

[MrDanikify]

guys im confused what is connection between hot water and streetlight systems ? :(( pls help

[produKtNZ]

@MrDanikify Electricity companies will turn the street lights on at a certain time in the evening to prevent them simply running all day and burning up precious electricity, which IS a valuable resource.

Home hot water systems are also controlled by the power company. Because they consume a ot of electricity, the company controls the load on the power network this way

[99Shifty]

why this motor must have 30kw? Its lot of 30kw no?

[GITsL9I]

@99Shifty 30Kw as the signal has to travel a long way across the transmission network, it has to overcome the line resistance and still have a large enough magnitude to be noticable above the rest of the system noise.

[TheYTCable]

1:08 onwards... is that the rotors momentum????

[Ronnocbot]

Sounds awsome when it starts, love that sound, what is this by the way, is it a a 3phase to 1 phase transformer?

[RODALCO2007]

@Ronnocbot 3phase 50 Hz to 3phase 1050 Hz

[Ronnocbot]

@RODALCO2007 Cool, thank-you!

-Connor

[Trifu22]

I don't get it... maybe you'll show a circuit diagram...

It changes the vawe form on the power cables and special receivers "listen" on the power grid and turn stuff on once the ripple is detected ?

[GITsL9I]

@Trifu22 pretty much, by using a high pass filter the ripple can be detected at the far end by a small computer circuit, then decoded to determine the message being sent and then act on the message if it is intended for them. It's a method called "power line carrier" and is used in many places for sending signals without additional wires being required.

[SINEKT]

What exactly are you people talking about with these ripples and motors ? I'm into electronics since a little kid and this is weird, I never heard about anything like this... what EXACTLY are these used for ? THANKS!

[RODALCO2007]

@SINEKT Basically remote controlling for electric hot water and streetlight systems with no external wiring required.

[Aleksandar998]

@RODALCO2007 So, if I got you right, It basically gets this 1050Hz Pulse to e.g. Streetlights and they light up, right ??

[GITsL9I]

@Aleksandar998 basically the motor can pulse a 1050Hz signal directly onto the power lines and the lights and pumps use a high pass filter to recieve the pulses at the other end, which they can then decode using a small computer in order to turn on or off. The bandwidth is very low, but with such short data streams this method is actually very useful as it requires no additional wiring between the power source and the lights/pumps. A filter will be required for harmonics though...

[Aleksandar998]

@GITsL9I Sooo.. I was kinda right. Wasn't I ?? Lol.

[legomaniac150]

@RODALCO2007 and it needs 30KW just to inject a little noise?

[RangieNZ]

@SINEKT The generation/transmission companies create a high frequency signal (about 20 times mains frequency), that is overlaid on top of the standard mains AC supply and sent out on the normal wires, thus the 'standard AC sinusoid' gets a 'ripple' in it. Customer premises suitably setup, are able to pickup this ripple and the message encoded within and then turn on/off circuits.  They are used for such things as turning off electric hot water circuits during periods of high load.

[SINEKT]

@RangieNZ OK, thanks, I got it. Very interesting though :)

[TheCoolmaster100]

Shame you did not record it till the rotor completley stopped spinning. I would have liked to listend to the coastdown.

[zordmaker]

Oh and BTW I just returned from a 2 week tour of New Zealand. Every time I saw a substation go by I thought of you..

[zordmaker]

You will never know how many audio engineers would love to see this machine thrown into a blast furnace and melted into slag!

[instinctfx]

If you are using a high gain guitar amp, that noise WILL appear in your signal. Ive had to time my bands guitar solos in between this injection period. Its made home recording a PAIN IN THE ASS.

[rysliv]

1 minute = 200 dollars?

[TheMrBlinx]

Just too exciting for me (NOT!).

[tvoice1]

what is ripple injection?

[TheEpiphan3]

Now thats really interesting. I always knew about the ripple switch but not how its generated. By a motor.

[RODALCO2007]

@TheEpiphan3 Yes, but also we have solid state devices doing the ripple control as well.

[londonpunk66]

how did i get here

[YoMomSaddam]

Can you explain this thing to me a little bit? I'm a bit confused. So, a 1050Hz tone on the wire is used to control the street lights and such?

[Ryantron9000]

@YoMomSaddam They send that signal down the wire to turn on and off various devices. They used to do it in the US for water heaters and streetlights.

[ratbag359]

The one for some of the hot water here in Timaru New Zealand uses 715hz

[koolfingaz]

I dont care what this is, but I love it!

[DeathlyHall0w]

Sorry, but I dont understand this video. Someone care to explain?

[MucusFelidae]

@DeathlyHall0w "Someone care to explain?"

It's about how to make noise, really loud powerful noise.

[grodenbarg]

1050 hz is the tone used to activate The Emergency Alert system in the US. It is broadcasted before an alert message is spoken.

LOL

[RODALCO2007]

@grodenbarg Interesting, as this is the 21 st harmonic from 50 Hz.

The signal goes through the power wires.

Your 1050Hz goes via the radio stations ?

[Ryantron9000]

@RODALCO2007

They play a tone on the radio or television and it can automatically turn on certain receivers to play the emergency warning.

[pmgodfrey]

@grodenbarg

LOL, no it's not. It's 853 and 960 Hz

[HERPDEDERP49]

MYYYYYYYYYYYYYYYYYYYYYYYYYYYY EEEEEEEEEEEEEEEEEEEEEEEEEEEEEE­EAAAAAAAAAAAAAAAAAAAAAAAAAAAAA­AAAAAAAAAAAAAAAARRRRRRRRRRRRRR­RRRRRRRRRRRRRRRRRRRRRRRRRRRRRR­RRRSSSSSSSSSSSSSSSSSSSSSSSSSSS­SSSSSSSSSSSSSSSSSSSSSSSSSSSSSS­SSSSSSSSSSSS

[FLICKtheUSA]

I thought it said 'nipple'

[carfansunited]

I don't know why, but i love it

[djblackarrow]

The speed of an electric motor depends on the frequency, the number of winding, and the number of coils.

[Wessexify]

Сильная машина ! Я видел только моторы 3 - фазные на 22,5 KWt ... У нас на металлургическом комбинате стоят моторы на 600 KWt ...

[DanFrederiksen]

eh I don't get this video

[rysliv]

haha... prolly costs like 50 bucks a minute to run that thing

[haseeb230]

Hi, Can anyone tell me that how much HP motor is needed to drive a 30 kw, 50 hz generator. I want to install that one in my farm house.

[Snoep76239]

Tuck in that long hair...

[JetMechMA]

This is the most OUTRAGEOUS big brother type thing I've ever seen. UNBELIEVABLE. You people put up with this? They can remotely switch off your appliances? UN-blanking-believable. Now I've seen everything. OH....MY....GOD !

[voltare2amstereo]

@JetMechMA big brother? what u talkin bout fool.

nah seriously, the control codes allow the network to switch off "off peak" devices like hotwater storage tanks etc, when load is high. in return the customer gets cheap electricity for certain devices,. btw only fixed devices are connected to offpeak.

[jamiand100]

Впечатляет инерция вращения вала после снятия напряжения питания *))

[TheCoolmaster100]

RODALCO2007, would you please do another video of it showing the coast, windown. I would like to hear it wind down till when it stops spinning.

[ChumpusRex]

If I installed one of these in my house, could I switch my meter to 'off-peak' rate on demand?

[RODALCO2007]

@ChumpusRex If you knew the code, yes. Most meters in NZ are controlled by time switches.

[Blade565]

I would love to hear the full wind down........

[Stevooo1985]

I know a normal 50Hz motor runs at 1500rpm, a 60 Hz 1800rpm ...

Does this one runs 30000rpm? My job is searching for problems in electromotors and testing them after their are repaired.

[RODALCO2007]

@Stevooo1985 It is a two pole motor running at 3000 RPM

[ChumpusRex]

What was the reason for the clunking in the background? Was it a contactor turning the injection on/off?

If so, what is the reason for the pulsing of the tone? Is the switching more complex than 'tone on = heaters on/tone off = heaters off'?

[RODALCO2007]

@ChumpusRex That is a contactor closing in and opening at the different channels. This system runs at 22 different channels. We only use 4.

[ExplosiveAnyThing]

@RODALCO2007 why do you inject 1050Hz ripple?

[akkudakkupl]

@ExplosiveAnyThing remote control

[DjRaveKing]

When you inject a 1000hz signal into a existing 50hz signal you get 1050hz , simple enough ? That's called superimposing .

[RODALCO2007]

@DjRaveKing It puts out the 21 st harmonic.

When the contactors open and close via a tuned circuit the 1050Hz signal is put on the 11 kV network.

[DjRaveKing]

@RODALCO2007 i see . good job on having so many awesome electrical videos . I Love them !

[PPGCSuicide]

what a GREAT Sound, thanks 4 upload this nice Video, =)

[ajs2120]

sounds good! i presume this is quite an old motor, what kind of power does it put out and is it normal 3 phase voltage or higher?

[RODALCO2007]

@ajs2120 3 phase 415 Volts

[SigEpBlue]

Gah, that makes my TEETH hurt.

[Amishman35]

So I'm guessing this motor puts a 1050 hertz tone into the power lines which turns on and off cold water heaters (why heat hot water?) to keep the demand for electricity more stable. If the tone is on the grid, you could probably pick it up with a 741 op-amp hooked to a foil panel. Or you could touch the end of a guitar amp lead...

[RODALCO2007]

@Photonicinduction LOL ! :-)

[devhook23]

@RODALCO2007 what's the whining sound shortly after the motor start?

[RODALCO2007]

@devhook23 That is the 1050 Hz being injected into the grid.

[devhook23]

@devhook23 nice

[DragonFlyback256]

I remember from childhood listening to a smallish water pump making just the same loud 1 kHz sound. It was 2-poled 3-phase, of about 500 Watts or so... but there that sound wasn't a healthy thing lol. That motor burned out frequently. And it emitted that noise only when there was enough pressure in the tank it pumped water into.

At 01:02 was the power shut down? If so, that's a good bit of spindown.

[RODALCO2007]

@DragonFlyback256 Correct, the spin down takes about 7 minutes.

It would be too long in real time, and make a boring video.

[DragonFlyback256]

@RODALCO2007

I guess it's basically an electromagnetic "siren", that outputs not into the open air but onto the grid. Siren fans often film even the whole spindown, up tho the full stop. So i guess, a little more spindown is not all that boring. =)

Btw, why 1050 Hz and not just 1000? Does it has something to do with pulsing the amplitude at 50 Hz (if it interferes with an 1000 Hz source)?

[RODALCO2007]

@DragonFlyback256 1050 Hz is the 21st Harmonic, don't know why that frequency was choosen.

[agoodm]

What is the purpose of this motor?

[RODALCO2007]

@agoodm Ripple control, to control hotwater and streetlight circuits remotely from a central control point.

A lot of these sets will be replaced with solid state devices in the next 10 years or so.

[thefatmantalks]

@RODALCO2007 how does this control them?

[RODALCO2007]

@thefatmantalks A ripple receiver in the meter box will pick up the signal and switches the HW load ON or OFF.

[JetMechMA]

@RODALCO2007 Ripple control? Hotwater control? Streetlight control? Don't the street lights just work off of the powerlines like my house does? The motor is converting rippled dc into smoother dc? Is that it. Where does the hot water come in? Is this in New York city? What's with all the steam pipes in new York City? Does the city supply hot water???? Why wouldn't every building have it's own boiler room?

[johnofe]

@JetMechMA @JetMechMA

slow down mate! this aint NY. Look up ripple control on wikipedia. This video is of the ripple injector that sends the signal through the power distribution network to the houses which each have a ripple receiver that will turn the hot water on or off when signaled. that's all. street light control is sometimes controlled the same way.

[TheWelly888]

1050Hz is the 21st harmonic of 50Hz. Impressively strong harmonic if that was what we heard! When you said "injecting" did you mean into the power supply?

[RODALCO2007]

@TheWelly888 Correct ! It is superimposed on the 11 kV network via a 415 / 11,000 Volts transformer.

[cheetawolf]

this is the same motor as your "30 KW motor starting" video! cool!

[RODALCO2007]

@cheetawolf Same type, we have many of these motor gen sets in our local substations.