Gearbox engines with their special features were placed in the engine room before gearless engines. Gradually, with the advancement of technology in the field of elevator motors, gearless motors came into use and were able to take the place of gearbox motors in some cases. The first thing that caused the difference between gearbox and gearless elevator motors was that the motors with gearboxes use the transfer of motion from the rotor to the gears of the gearbox and from there it is connected to the towbar and will cause the cabin to move.
is that there is no such thing as a gearbox in gearless engines. But in gearless motors, the rotating power of the rotor is directly transferred to the blade and will cause the towing wire to move. The difference between gearbox and gearless elevator motor is in various cases. For example, it can be said that engines with gearboxes have more vibration when moving. The sound produced by them is more and they consume more energy.
In this case, they are less efficient than gearless engines. On the other hand, gearless engines are smaller than gearboxes and occupy less space. If it produces the same power as gearbox engines, you will no longer need an engine room to install them.
🔶🔷 Difference in the structure of engine with gearbox and gearless 🔶🔷
One of the most important differences between gearbox and gearless elevator motors is in their structure. As it is clear from the name of engines with gearbox, these engines have a gearbox in their structure, while gearless engines do not have this part. In gearless motors, the rotor rotates inside the motor. As this part rotates, the rod whose one end is inside the rotor will also start rotating. The other end of the rod is connected to the gearbox and will cause the gears of the gearbox to rotate.
The rotation of the gears in the gearbox causes the gearbox plate to rotate and then the tow wire is pulled up. This movement raises or lowers the elevator car. In fact, in this matter, the friction between the gearbox and the towing wire causes the cabin to move, which converts part of the energy produced into heat.
🔶🔷 Other differences between gearbox and gearless engines 🔶🔷
Elevators that have gearless motors, unlike elevators with gearbox motors, because they do not have the gearbox part, they will have less vibration and shaking in the cabin, and this is one of the merits of using these motors in elevators. Gearless engines do not need oiling, but on the other hand, engines with gearboxes must be oiled regularly. One of the best advantages of gearless motors compared to gearbox motors is that gearbox motors heat up in high work traffic and continuous use, causing the temperature sensor to become sensitive and turn off to cool the motor.
This issue makes it impossible to use the elevator for a while. This is despite the fact that the gearless motors will not heat up in long and continuous use and there is no news of the motor failing. The engine speed is 150 for gearless engines and this value is around 1500 for gearbox engines. This causes gearless motors to produce less noise. Gearbox engines will be the exact opposite of these engines and they are very loud.
Another difference between gearbox and gearless elevator motors is that geared motors need 2 to 3 times more energy than gearless motors to start their work. The efficiency of gearless motors is about 98%, while this number is about 50% in geared motors, and this shows that geared motors have twice as much energy as gearless motors. The difference in volume and weight of the two Motors are another difference between gearbox and gearless elevator motors. Due to the smaller volume and weight of gearless motors, they can be installed in MRL gearless elevators (without engine room). On the other hand, to install engines with gearbox, you need a large space and place, and these conditions do not exist for engines with gearbox.
On the other hand, the starting current of gearless motors is 50% more than the nominal current, and in gearbox motors, we will see the starting current 4 times more than the nominal current. Gearless engines do not need a flywheel. But engines with a gearbox must have a flywheel.