Stable Value
Due to harsh operating conditions with alternating loads and high ambient temperatures, classic rolling mill motors are commonly used. In some applications, ring-rib motors are still considered a standard solution for rolling mills. Three-phase motors with horizontal cooling fins have also been successfully used in various rolling mill applications in recent years.
It is important that the different load conditions, including required acceleration and braking torques in rolling mill operations, are fully considered in system design and calculation.
In some cases, slabs can become blocked and are then driven by only a few rollers, which can place significant load on individual drive systems. Roller table motors are primarily responsible for accelerating and decelerating slabs, profiles, or pipes within the system. During constant-speed transport phases, power demand is relatively low.
Gear motors in steel mill applications, particularly in rolling mills, are selected with a high service factor to account for high acceleration work and impact loads.
In addition, it can happen that a slab blocks and is accelerated by only a few rollers, which overloads the respective drives. The main task of the roller table motors is to decelerate and accelerate the slabs, profiles or pipes on the system. Relatively little power is needed in the transport phases with constant speed. Geared motors in steel mills, especially in the rolling mill, are calculated and selected with a high operating factor based on the acceleration torque due to the high acceleration work and the impact loads.