Wound-rotor asynchronous motors up to 8 MW for mills, crushers and shredders
Wound-rotor asynchronous motors of medium and high voltage for drives with heavy starting and high moment of inertia: cement and coal mills, crushers, scrap shredders and pumps in networks of limited capacity.
- Power
- up to 8 MW (export supplies for metallurgy); within the 0.5–15 MW range
- Rotor
- wound-rotor (with slip rings); squirrel-cage variants
- Starting
- via external rotor resistance; brush-lifting mechanism
- Speed control
- asynchronous-valve cascade with slip energy recovery
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Wound-rotor asynchronous motors of medium and high voltage for drives with heavy starting and high moment of inertia: cement and coal mills, crushers, scrap shredders and pumps in networks of limited capacity. The wound rotor allows precise control of starting current and torque through an external resistance in the rotor circuit, protecting the motor and the local network during start-up. For the cement industry the manufacturer builds mill motors almost exclusively with wound rotors. The manufacturer is a qualified supplier to leading cement engineering companies, including Lafarge, Holcim, FL Schmidt, Technip and Cemex, and covers all process stages: the limestone crusher, raw, ball, coal and vertical roller mills, homogenizing compressors, induced-draft and forced-draft fans, rotary blowers, conveyors and the rotary kiln. Brush-lifting mechanisms are offered. The manufacturer was also the first in the world to develop twin-motor mill drives with squirrel-cage rotors. In metallurgy the export range includes wound-rotor motors of up to 8 MW for demanding metallurgical applications. For scrap shredders, where motors are subjected to repeated shock loads and strong vibration, special design criteria were developed together with Leibniz University Hannover, and the manufacturer has produced such motors since the 1980s. They feature reinforced output shaft end, bearing end shields, end windings and frame, and the laminated rotor core is shrink-fitted with increased interference and additionally welded to the shaft ribs. For dusty sites the motors are supplied in the WP version with filtration. At irrigation and desalination pumping stations in Egypt, the Middle East and Saudi Arabia, wound-rotor motors reduce starting currents on weak networks. For controlled output they can be supplied with an asynchronous-valve (thyristor) cascade in which slip energy is returned to the network rather than dissipated as heat. Production takes place in Tapiószele (Hungary).
Technical specifications
| Power | up to 8 MW (export supplies for metallurgy); within the 0.5–15 MW range |
|---|---|
| Rotor | wound-rotor (with slip rings); squirrel-cage variants |
| Starting | via external rotor resistance; brush-lifting mechanism |
| Speed control | asynchronous-valve cascade with slip energy recovery |
| Shredder version | reinforced shaft, end shields, end windings and frame; rotor with increased interference fit |
| Dust protection | WP with filtration |
Request a price and lead time
Wound-rotor asynchronous motors up to 8 MW for mills, crushers and shredders. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
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