A lift is like an oven, but with gravitational potential energy instead of thermal energy. Thames Valley controls are made by Dewhurst. The Dewhurst factory is in Hanworth, near Heathrow Airport, so maybe they were named after the location.
in Sofia they are currently installing lifts at the enterances of some pedestrean sub-passages and i saw that they have worm drive motors and they are probably oronas but i am not sure
Are there ever people inside the lift cars when you are on top? In this video, I could have sworn I heard someone laughing other than you, and your friend, HateGenerics. If the answer is yes, then I'll bet you hear some pretty odd conversations from folks who think they are in a private setting. Just curious...
What's the door mechanism doing at 9:23? I get the idea it's trying to open the door, but I've always wanted to understand how all the pieces fit together. Edit: Wait, is this a pre-leveling mechanism at work?! Cooool.
At 9:23 we were trying out the manual rescue procedure. The lift was moving by gravity. The lift is normally switched off when doing this, but as we had forgot to do this the lift was very confused.
@@benolifts Ah, I see! Wow, lifts have so many fascinating (and tragically obscure) details and safety features. I've been watching tons of videos from your channel over the past couple of days; it's been awesome. I noticed some broken Discord invites scattered about. I also registered on the forum as i336_. What would be the best way to get in touch? (If you prefer email to talk or send links, it's my username @gmail)
Have you got a good sized picture of this thames valley speed control, diagram in 17:47. Is this motor standard three phase or custom for this application. also wondering, many caps around, if the are playing with this caps in some way to shift one or more phases, or they are changing the way the motor is wired. You can run a three phase motor under single phase with proper capacitor setups for a given condition. Perhaps this is not a power module, but just a logic for swtich caps and conections between motor and mains with precision timming to get this stepping that is shown in the figure. It cant be power electronics. Tooooo small for this era and wouldnt last that long and would be insane expensive. also controllers were not that fast nor powerfull to achieve what todays VFD do
Looking at the diagram it looks like the motor is wired up to the speed control. There are relays that reverse phases 1 and 2 which would change direction of motor. As far as I can can tell the speed control is simply chopping the entire 3 phase supply. It is effectively DC PWM on a AC power supply. A big motor like this wouldn't use capacitors to simulate 3 phase because that is a crap method, and 3 phase doesn't need to be simulated as it is already there.
***** Of course there is a three service there. I said that as example. Getting three phase from single is inefficient. What I mean is you can shitf phases by using caps and if this could had been used to control speed in any way. By chopping you mean phase control like in a dimmer circuit ?. I believe you cant chop faster than the mains freq. Once you gate, it will stay gated till the next zero cross. So, you cant change the frequency, just the waveform. Of course, you get the point when you chop slower than mains freq, you will end sorta of controlling speed but chopping will be very slow and noticeable. Not vey keen on power electronics, just figuring out how they managed this in the 80s and keep it running till today. But something is sure, they were creative, nothing compared to stick a PLC with some relays.
It is very weird. The circuit diagram for it looks very simple. The humming sound it makes is very low pitched. Another weird old system is Bull motors super start. As far as I know this is a 6 phase motor which switches the supply from 123123 to 112233 which is like switching between 2 frequencies.
***** Its like you said, look here ... www.electronicshub.org/wp-content/uploads/2015/04/SCR6.jpg Uses 6 SCRs and of course ... a logic controller. It wont pitch higher than any hexaphase signal because it cant. This change the duty of each sine cicle for each phase in both directions. Still think that this approach for an induction motor is quite inefficient (compared to any VFD) but probably better than two speeds. But they cannot get any speed at any load with that, and probably if forced, motor will tend to overheat in the slowdown process since voltage is not intended to control speed, but frequency
" As far as I know this is a 6 phase motor which switches the supply from 123123 to 112233 which is like switching between 2 frequencies." that's just changing the number of poles, therefore the speed
How come sleeping motoring like this?! Is no-way people who sleep in the motoring room. It's dangerous inside elevator motoring room could be kill in the equipments!!!
![My adventure in Prague [2024]](http://i.ytimg.com/vi/At-Fo16ar04/mqdefault.jpg)
I love these sleeping/camping/travelling adventure videos, Beno! Please do more of the same.
I agree
I agree
"... It was sort of fun, but I didn't really get that much sleep" *_LIFT MOTOR STARTS UP_*
SaY, I WoNdEr WhY.
Good dubbing sync btw.
A lift is like an oven, but with gravitational potential energy instead of thermal energy.
Thames Valley controls are made by Dewhurst. The Dewhurst factory is in Hanworth, near Heathrow Airport, so maybe they were named after the location.
ccityplanner12 : Dewhurst is in Feltham and TVC is in Wales
i like the bell of the express lifts "TING"
Please do more of these!!
You shall do an sleeping on a lift adventure
with independent service mode.
Were you in Bristol recently? On Saturday I was in the BRI trying to find some good lifts and one was on Inspection mode!
I wasn't in Bristol. I wonder if it was an engineer or someone surfing it.
in Sofia they are currently installing lifts at the enterances of some pedestrean sub-passages and i saw that they have worm drive motors and they are probably oronas but i am not sure
I don't think Orona install worm drives anymore.
Great stuff. 👍
Come to Cumbernauld!!
Cucumbernauld
I have slept rough once before as part of a protest in Hemel Hempstead. It is indeed tiring. I don't think I can do it again as I do have insomina.
So is everything okay now?
That person with you sounds very young.
Are there ever people inside the lift cars when you are on top? In this video, I could have sworn I heard someone laughing other than you, and your friend, HateGenerics. If the answer is yes, then I'll bet you hear some pretty odd conversations from folks who think they are in a private setting. Just curious...
2:39 lol '''and now we go along to a stanna witch is crap'''
Stupid\crap stannah
What's the door mechanism doing at 9:23? I get the idea it's trying to open the door, but I've always wanted to understand how all the pieces fit together. Edit: Wait, is this a pre-leveling mechanism at work?! Cooool.
At 9:23 we were trying out the manual rescue procedure. The lift was moving by gravity. The lift is normally switched off when doing this, but as we had forgot to do this the lift was very confused.
@@benolifts Ah, I see! Wow, lifts have so many fascinating (and tragically obscure) details and safety features.
I've been watching tons of videos from your channel over the past couple of days; it's been awesome. I noticed some broken Discord invites scattered about. I also registered on the forum as i336_. What would be the best way to get in touch? (If you prefer email to talk or send links, it's my username @gmail)
maybe the ac regulator uses a transformer with many windings?
in 5:42 the lift became mad please mind the doors thislift is out of service going down olease mind the doors
It is a generic after all...
Also in 13:50
Grrr no worm drive Orona 😩
before we had the orona now we have the corona
XD
Was The Noise Ok??
imagine trying to sleep, but every ten minutes someone comes into you room and wakes you up.
Victor the 5 year old speaking at 2:23?
Nope, it was HateGenerics
+Hate Generics Oh sorry.
How did you manage to get on top of the lifts? It looks like a great deal of fun.
It is ilegal and dangerous. You can get a fine of up to 1000 💶 for doing it.
Have you got a good sized picture of this thames valley speed control, diagram in 17:47. Is this motor standard three phase or custom for this application. also wondering, many caps around, if the are playing with this caps in some way to shift one or more phases, or they are changing the way the motor is wired. You can run a three phase motor under single phase with proper capacitor setups for a given condition. Perhaps this is not a power module, but just a logic for swtich caps and conections between motor and mains with precision timming to get this stepping that is shown in the figure. It cant be power electronics. Tooooo small for this era and wouldnt last that long and would be insane expensive. also controllers were not that fast nor powerfull to achieve what todays VFD do
Looking at the diagram it looks like the motor is wired up to the speed control. There are relays that reverse phases 1 and 2 which would change direction of motor. As far as I can can tell the speed control is simply chopping the entire 3 phase supply. It is effectively DC PWM on a AC power supply. A big motor like this wouldn't use capacitors to simulate 3 phase because that is a crap method, and 3 phase doesn't need to be simulated as it is already there.
***** Of course there is a three service there. I said that as example. Getting three phase from single is inefficient. What I mean is you can shitf phases by using caps and if this could had been used to control speed in any way. By chopping you mean phase control like in a dimmer circuit ?. I believe you cant chop faster than the mains freq. Once you gate, it will stay gated till the next zero cross. So, you cant change the frequency, just the waveform. Of course, you get the point when you chop slower than mains freq, you will end sorta of controlling speed but chopping will be very slow and noticeable. Not vey keen on power electronics, just figuring out how they managed this in the 80s and keep it running till today. But something is sure, they were creative, nothing compared to stick a PLC with some relays.
It is very weird. The circuit diagram for it looks very simple. The humming sound it makes is very low pitched.
Another weird old system is Bull motors super start. As far as I know this is a 6 phase motor which switches the supply from 123123 to 112233 which is like switching between 2 frequencies.
***** Its like you said, look here ...
www.electronicshub.org/wp-content/uploads/2015/04/SCR6.jpg
Uses 6 SCRs and of course ... a logic controller.
It wont pitch higher than any hexaphase signal because it cant. This change the duty of each sine cicle for each phase in both directions.
Still think that this approach for an induction motor is quite inefficient (compared to any VFD) but probably better than two speeds. But they cannot get any speed at any load with that, and probably if forced, motor will tend to overheat in the slowdown process since voltage is not intended to control speed, but frequency
" As far as I know this is a 6 phase motor which switches the supply from 123123 to 112233 which is like switching between 2 frequencies."
that's just changing the number of poles, therefore the speed
HateGenerics swearing is making me cringe but other than that pretty awesome.
I like the way you swear in the background of my videos. I find it funny.
+Beno Same. "Fuck! I just noticed people are in it!" Or "Ah shit it's going to the top floor there isn't enough room EMERGENCY STOP!"
+Hate Generics the choice language just adds to the ambience XD
is there any vf drive in the motor room at 14:50?
Older 2-speed mate, can tell by the sound.
16:49 listen... 50hz being pulsed in and out making for a pretty loud and growly stop :)
How old are you and HateGenerics? (If you don't mind me asking!)
a baby bell express bell
I am wandering how this guy isn't in jail
THIS LIFT HAS LESTER KONTROLS VERY SHITTY INSTALLATION.
them ropes are tied off illegal beno
How do you mean?
there on the wrong way round and there should be 3 clips to each rope, the insurance will pick it up.
Why you doing this? Are u work for elevator company?
Why would I work for a lift company (there are no elevator companies here).
I mean u know a lot as i see..
Beno you should do this for charity because is this is what you do fur fun this could raise a lot of money
Jelly Guys how does lift surfing raise money for charity? It’s an unsafe things that nobody should be in knowledge off
How come sleeping motoring like this?! Is no-way people who sleep in the motoring room. It's dangerous inside elevator motoring room could be kill in the equipments!!!
It's not really that dangerous