I'm going to pin my own comment here just to say... some of these comments are so interesting. You know what, it doesn't seem to matter how long I research these videos to make them as accurate as possible, there is ALWAYS more to learn and you guys open my eyes to things that I didn't know. The only problem is, I have to upload a video to learn these things! If only I could reverse time and learn these things before I design the video for upload! Impossible, but thanks for the valued comments you've added here. I'm hoping that everyone is benefiting including me! :)
@CrazyPlayer-pf2hv3 жыл бұрын
@Worlds largest Culvert theatrical Poster for poltergeist 3 by chris zabriskie.
@jimmarsden4359 Жыл бұрын
Hi there. I'm new to motors and found this video great for my learning, it's very clear and concise. There is one thing, when the motor is at its desired speed, you said a contactor pulls in and removes the resistance on the windings in the panel. What tells this contactor to pull in? Is there a centrifugal switch or some form of switch somewhere? How does it know when to pull in?
@juperrr Жыл бұрын
@mrmattandmrchay What type of wave is beetween the rotor phases. Is it an AC sine wave or DC wave?
@zordmaker Жыл бұрын
The sequence is actually correct. For this setup the time the resistors need to be in circuit is extremely short, less than 1 second. This is common in small (yes, this IS a small one) AC motors which are used for inching (i.e. repeated starting and stopping) as is commonplace in this lift when someone is lining up a floor. The starter in this case is not there to provide more torque but provided to limit the initial stalled inrush current in order to comply with the supply authority regulations. Yeh the time could be a little longer but it's clearly working correctly in this configuration. As soon as the rotor moves it's no longer stalled and so its fine to go straight to DOL operation which provides plenty of torque through the geared drive.
@dykodesigns4 жыл бұрын
The motor design reminds me of the wood working machines that we had at school in the workshop. They ran at 415 volts and you couldn’t let them run at full speed from a cold start. They all had a special start up and turn off sequence where there was a third state on the on/off dial. If you turned them on too quickly, the circuit breaker / fuse box would trip. Every machine had it’s own fusebox as well.
@Alexis_du_604 жыл бұрын
Ooh yes I remember seeing a pump (à wastewater pump or something) like that too! If you got the sequence wrong, you blew the fuse! It was really long to start (like you first had to press a switch, then push a certain button and release the button after 20 seconds), it was very unusual to say the least. It was later ripped apart with a assembly of programmable logic controllers, now all you have to do is flick a switch and the PLC will do the rest...
@mrmattandmrchay4 жыл бұрын
@@Alexis_du_60 @dykodesigns2yt Both very interesting comments! Yes, makes sense!
@bluemarvel4 жыл бұрын
I know it has nothing to do with this particularly video but since we are / I’m in quarantine, I’m doing a mrmattandmrchay marathon, rewatching all your videos to get the time by. 😅
@Lift.Tracker4 жыл бұрын
Mike i386 Great idea. His old videos can be interesting too! :-)
@mrmattandmrchay4 жыл бұрын
To be, I consider that to be an excellent idea haha! If you could just watch them enough to get me a million views then that'd be superb!! haha, just joke. Thanks very much for watching my videos :)
@andyhill2424 жыл бұрын
Thank you for this easy to understand video. I have never known the workings of a slip ring motor before because I've never needed to. Now my education is complete!
@mrmattandmrchay4 жыл бұрын
Me included! But it's these situations that I put myself in that means I have to research how these machines work and I too learn massives amount of stuff (probably that I didn't NEED to know haha!)
@matzeknoob36884 жыл бұрын
This video is great! Greetings from germany
@rassel20004 жыл бұрын
Hey ein Deutscher 😂
@mrmattandmrchay4 жыл бұрын
Hey, thanks Matze!
@linggiman2 жыл бұрын
I am glad youtube channel like yours exist. Cheers
@themaconeau4 жыл бұрын
I know 9/10 of naff all about lifts. I know roughly how motors work so, there's that. But you clearly conveyed the use of slip ring motors, how they operate, their advantages and show them in action. I love these videos because of their quality and this one is no exception. Looking forward to the next one 👍
@mrmattandmrchay4 жыл бұрын
COOOOL!, Thanks for the very nice comment :)
@DanielMeakin14 жыл бұрын
I love your chanel because of grate interesting videos that I learn from them 😁. I'm from the UK Buckinghamshire
@mrmattandmrchay4 жыл бұрын
Cool, thanks for watching! What part of Buckinghamshire are you from? I'm in High Wycombe.
@DanielMeakin14 жыл бұрын
@@mrmattandmrchay Aylesbury. I thought you lived further than that.
@abpsd734 жыл бұрын
Being a motor is essentially a rotating transformer, increasing the resistance of the rotor windings (adding the starting resistors) decreases the current of the stator windings. Once the motor is rotating, removing the resistance provides the motor to run at rated power and torque.
@mrmattandmrchay4 жыл бұрын
That's a brilliant comment and observation!
@reeschubili8972 ай бұрын
Excellent video👏👏👏👏
@kaspervandelaar19872 жыл бұрын
this was so interesting to watch! Im learning about electro motors in my studies, but hard a hard time visualising what was going on. This was a perfect help! Great explanation!!
@n.sivaramakrishnakrishna68672 жыл бұрын
Hai sir iam nsivaramakrishna thanks again your time with the class prasnet my role
@georgieippolito99244 жыл бұрын
first the video was private the other day and I'm like dammit! I check again now I'm like whoohoo! can you make a playlist of the motor rooms? that's the best part of your videos.
@mrmattandmrchay4 жыл бұрын
yeah, I made a big error calling the rotor an armature! Adjusting the visuals wasn't that difficult, but then I had to re-do ALL the voiceovers and make the video match the new voice overs. Mostly the same words, but different lengths - ARGGGH added 1 day's editing!
@MenzelMotors4 жыл бұрын
good explanation, we love slip ring motors ;-)
@mrmattandmrchay4 жыл бұрын
thanks! :) Hope I did them some justice!
@dimitrijb3 жыл бұрын
Very well edited and explained video ! Thank you !
@38911bytefree4 жыл бұрын
NICE. TOP NOTCH AS USUAL !!!!!.
@SamSitar4 жыл бұрын
very easy to follow as well.
@38911bytefree4 жыл бұрын
@@SamSitar Yes, it should be class room material. Trying to explain this without this video will take way longer and not so clear.
@mrmattandmrchay4 жыл бұрын
Cool, thanks for the comment :)
@luckychohan37052 жыл бұрын
This video is pure gold Thanku sir 👏
@mrmattandmrchay2 жыл бұрын
wow, thanks very much for the comment :)
@thienhuynhminh18412 жыл бұрын
Thank you for sharing your knowledge
@thumbsup92082 жыл бұрын
Pretty nice. Thank you very much
@simontay48514 жыл бұрын
Why is the motor not running as it should. Does a timing component need replacing?
@mrmattandmrchay4 жыл бұрын
Possibly, or an engineer not knowing what they are for had adjusted them incorrectly.
@n.sivaramakrishnakrishna68672 жыл бұрын
Hai iam nsivaramakrishna thanks again
@nikodoge994 жыл бұрын
Nice.
@mrmattandmrchay4 жыл бұрын
thanks
@azurplex4 жыл бұрын
In the U.S. the three phases of power are coded black, red and blue.
@ulisese.ericksonr.34013 жыл бұрын
Amazing , thanks a lot
@markh52104 жыл бұрын
3 Phase circuits are now coloured Brown/Black/Grey with Blue as the neutral.
@abpsd734 жыл бұрын
Phase identification colors and sequence vary depending on supply voltage involved and the country you are in.
@markh52104 жыл бұрын
@@abpsd73 BBG is the current UK/EU colour scheme (replacing RYB in the UK). MMMC is a UK based channel.
@abpsd734 жыл бұрын
@@markh5210 I'm in North America. Working on imported machinery from Europe (German, British, and Italian,) I've seen 3ph BRN/BLK/BLU, GRY/BLK/BRN, YEL/BRN/BLK. North America is RED/BLK/BLU for lower voltages and ORG/BRN/YEL for higher voltages. Canada and the US are approximately the same, but sequencing is different.
@mrmattandmrchay4 жыл бұрын
Yes, this is something else that I learnt from this video from the comments. I'm still old-skool haha! HOWEVER, not sure that grey/black and brown would have shown up as much as red/yellow/blue does in the visuals :)
@ArgaTheRexouium4 жыл бұрын
The colours have changed in 2004 from red, yellow and blue to grey, black and brown
@mrmattandmrchay4 жыл бұрын
Yes, this is something else that I learnt from this video from the comments. I'm still old-skool haha! HOWEVER, not sure that grey/black and brown would have shown up as much as red/yellow/blue does in the visuals :)
@blackartista3 жыл бұрын
Do best transition time from resistance connection to shorting coils depends on motor size/power or resistances or both? I appreciate the time you put into sharing this knowledge
@Apexes_community2 жыл бұрын
maintain quality as well as quantity
@mohiduddin35802 жыл бұрын
Thank you sir very nice, sir elevator motor - rotor and coil Replacement video can I find
@rjs1985854 жыл бұрын
Did you manage to fix or time those relays up so they started up correctly?
@user-fz4is7in1c2 жыл бұрын
Great video! But there is an inaccuracy: the rotor speed NEVER catches up with the synchronous speed and the difference between rotor speed and synchronous speed is called "slip", which makes the rotating magnetic field of the stator sweep round and round through the surface of the rotor, induce electromotive force to let electric current flowing in the rotor circuit. If the rotor rotates at synchronous speed, NO torque is created, because there is NO electromotive force and NO current through the rotor circuit.
@hrudanandasahoo6814 жыл бұрын
Help full 🙏🙏
@mrmattandmrchay4 жыл бұрын
cool thanks.
@VijayKumar-in7zwАй бұрын
These windings are in delta, how can the stopping jerk is maintained in these machine special in up travel with balance load, is there roll back felt.
@AlexR_44 Жыл бұрын
neat
@mernok20012 жыл бұрын
1:27 it creates a rotating magnetic field, not electric field.
@robertoguerra53754 жыл бұрын
Great video :) do you have a picture of the slip ring? Would it need to support all the motor amps as the stator?
@rasyidanbramasta11663 жыл бұрын
Waduh aku entok tugas tekok dosen tentang iki su
@williamhuang83094 жыл бұрын
So the shorting is just a bypass.
@mrmattandmrchay4 жыл бұрын
yep, but bypass is more an American word. I work with electronic systems for my job and train engineers, and I always refer to it as 'shorting'.
@ag63713 жыл бұрын
Only star-delta and autotransformer starters work with slip-ring motors. VFDs and soft starters don't work
@povilasstaniulis94844 жыл бұрын
Interesting technology. Not really relevant nowadays as most elevators use either a VFD or simple two speed motors.
@qeelevators29604 жыл бұрын
Uploaded twice (:
@mrmattandmrchay4 жыл бұрын
yep, I made a big error calling the rotor an armature! Adjusting the visuals wasn't that difficult, but then I had to re-do ALL the voiceovers and make the video match the new voice overs. Mostly the same words, but different lengths - ARGGGH added 1 day's editing!