Interesting motor design, minimising the floor space needed, likely to fit into a smaller motor room. Plus the brake being before the worm gear, the designer wanted to be absolutely sure the brake would never be able to be overdriven, no matter the load in the car. Wonder how many poles that motor is, and the reduction of each stage of the gearbox before the worm drive.
The 13VTR machines are standard single reduction stage worm drives. The brake is on the worm side as with any other machine. The Motors are standard 3-phase asynchronous motors with 4 poles, just like in all geared lift machines in Europe (with some exceptions in the UK and in the former soviet region using 6 poles). 4 poles at 50 Hz equals a synchronous speed of 1500 rpm, the real speed of the motors though is slower of course due to slip, 1405 rpm in this case. As these motors run on thyristor drives, they have to be pole changers and have a second winding with 16 poles and a nominal speed of 340rpm for braking. Sadly, I do not have exact data on the gearbox ratio as there was no info plate but I constructed the most likely value, which is a ration of 40/3. This fits together with a rope speed of 3.2m/s (2*1.6m/s because of 2:1 roping) and a sheave diameter of 580mm, which is a common value for sheaves and fits the size by looking at it. Schindler for example uses a gear ratio of 41/3 in this situation with a sheave diameter of 570mm, resulting in 1465 rpm on the motor.
Meiner meinung doch ziemlich billige Anlagen. Doch sehr schönes Bremsgerausch 😀 Die Gamma Steuerungen sind hammer. Auch typisch: Keine Ausgleichseilen oder Ketten bei diese höhe.
Finde etwas schade dass sie keine frühöffnenden Türen haben. Die Option hat man hier wohl nicht gekauft, die Schütze dafür fehlen auch im Schrank. Die Kabinen sehen dafür innendrin schön aus. Doch, die Anlagen haben Ausgleichsketten, am Gegengewicht rechts angehängt. Sieht man bei 5:10
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5:28 Interesting how rough-and-ready the door operators seem on these.
Nice video, as usual!
At 4:53 there's also a photo without the cover. It's solid old tech that lasts.
Thank you!
Beautiful Otis elevators
They are, thx!
Always enjoy your videos, so thanks for another! Any idea what the point is of the aluminum fencing between the shafts?
You're welcome! The fencing between the shafts is fall protection as well as protection against the moving car in the other shaft while working.
Interesting motor design, minimising the floor space needed, likely to fit into a smaller motor room. Plus the brake being before the worm gear, the designer wanted to be absolutely sure the brake would never be able to be overdriven, no matter the load in the car. Wonder how many poles that motor is, and the reduction of each stage of the gearbox before the worm drive.
The 13VTR machines are standard single reduction stage worm drives. The brake is on the worm side as with any other machine. The Motors are standard 3-phase asynchronous motors with 4 poles, just like in all geared lift machines in Europe (with some exceptions in the UK and in the former soviet region using 6 poles). 4 poles at 50 Hz equals a synchronous speed of 1500 rpm, the real speed of the motors though is slower of course due to slip, 1405 rpm in this case. As these motors run on thyristor drives, they have to be pole changers and have a second winding with 16 poles and a nominal speed of 340rpm for braking.
Sadly, I do not have exact data on the gearbox ratio as there was no info plate but I constructed the most likely value, which is a ration of 40/3. This fits together with a rope speed of 3.2m/s (2*1.6m/s because of 2:1 roping) and a sheave diameter of 580mm, which is a common value for sheaves and fits the size by looking at it.
Schindler for example uses a gear ratio of 41/3 in this situation with a sheave diameter of 570mm, resulting in 1465 rpm on the motor.
Mooie installatie , dank voor de rondleiding 👍
You're welcome!
Gamma D fonctionne avec 10 Thyristors régulation par inversion de couple .
Very similar to Schindler Dynatron S or old Ascentronic.
Torque inversion? Sounds sophisticated.
Die beiden stehenden Motoren sind nicht oft zu sehen! Gute Aufnahmen!
Dankesehr!
Those relays! Oh my god! Loud!
Contactors on Otis are often pretty loud, that's true.
Thanks for replying!
Why? Do they need to handle a ton of current?
@@Avidiy Not more than any other lift, the make and model used is just noisy.
@@TheLiftDragon yeah, we should call them contactors not relays.
Sehr schöne Otis Anlage das war wirklich noch langlebige Qualität, leider nicht mehr zu vergleichen mit einen Gen2 von Heuzutage.
Das ist in der Tat so. Die Anlagen hier haben schon über 30 Jahre auf dem Buckel und dafür weden heute Gen2s nicht mal mehr ausgelegt.
Are those motors DC or AC?
Normal 3 phase AC.
Meiner meinung doch ziemlich billige Anlagen. Doch sehr schönes Bremsgerausch 😀 Die Gamma Steuerungen sind hammer. Auch typisch: Keine Ausgleichseilen oder Ketten bei diese höhe.
Finde etwas schade dass sie keine frühöffnenden Türen haben. Die Option hat man hier wohl nicht gekauft, die Schütze dafür fehlen auch im Schrank. Die Kabinen sehen dafür innendrin schön aus.
Doch, die Anlagen haben Ausgleichsketten, am Gegengewicht rechts angehängt. Sieht man bei 5:10
@@TheLiftDragon Oh ok, habe ich verpasst.