Synchronous motors 500 kW to 10 MW for compressor, mill and rolling mill drives
AC synchronous motors with a rated power from 500 kW to 10 MW for driving compressors, crushers, mills and rolling mills. Constant speed and constant torque, and on the grid the motor compensates reactive power. Each machine is built to order.
- Rated power
- 500 kW to 10 MW
- Type
- AC synchronous motor
- Operating mode
- constant speed and constant torque
- Reactive power compensation
- yes, when running from the grid
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The synchronous motors are part of the compact generator and motor programme of the company from Zagreb (Croatia). According to the manufacturer's website and the 2025 product catalogue, the rated power is from 500 kW to 10 MW. The same 10 MW is the general limit of the motor programme for induction and synchronous machines, both high and low voltage.
A synchronous motor turns at a speed rigidly tied to the grid frequency and the number of poles, and develops constant torque. It is therefore used where constant speed and constant torque are required. When running from the grid, the motor can supply reactive power by adjusting the field current and compensate the reactive load of the plant. The manufacturer names reactive power compensation directly among the main properties of these machines.
The motors are part of electromechanical drives for compressors, crushers and mills, and of rolling mill drives. Each machine is designed for a specific order. The engineering department, about 80 engineers in electrical and mechanical design and technology, prepares the documentation in three stages: for approval by the customer, working documentation for production, and as-built documentation after installation, commissioning and trial operation.
At its own plant in Zagreb the company performs lamination punching or laser cutting, core stacking, manufacture of stator and rotor windings, machining and assembly. It has vacuum pressure impregnation (VPI) plants for windings and poles, a pole press, coil forming and winding machines, a pole coil brazing station and balancing stands. Welded and machined parts of high-voltage motors (pole wheels, rotor spiders, bearing supports, fans, brackets) are made by the company itself, including steel components for nuclear power plants.
The rated voltage, cooling method and type of excitation system are not given in the public materials for the synchronous motors and are determined by the order. Excitation systems and voltage regulators for synchronous machines are made by another company of the same manufacturer. The service department maintains motors of its own and of other makes: winding repair, bearing replacement, supply of new stators and rotors, balancing, and no-load tests to IEC standards. Applications are metallurgy (rolling mills), mining and building materials (crushers, mills), the oil, gas and chemical industries (compressors), and industrial networks where reactive power compensation is required.
Technical specifications
| Rated power | 500 kW to 10 MW |
|---|---|
| Type | AC synchronous motor |
| Operating mode | constant speed and constant torque |
| Reactive power compensation | yes, when running from the grid |
| Drive applications | compressors, crushers, mills, rolling mills |
| Manufacture | to order, documentation in 3 stages (approval, working, as-built) |
| Winding impregnation | VPI |
| Rated voltage | not stated in the public materials (HV and LV motor programme) |
| Source | manufacturer's website, motors section; 2025 catalogue, p. 13 |
Request a price and lead time
Synchronous motors 500 kW to 10 MW for compressor, mill and rolling mill drives. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What is the power range of the synchronous motors?
The rated power is from 500 kW to 10 MW. The same 10 MW is the general limit of the whole motor programme for HV and LV induction and synchronous machines.
Do these motors compensate reactive power?
Yes, when running from the grid, by adjusting the field current. This is convenient at plants with a large reactive load.
What voltage and cooling do the synchronous motors have?
They are not given in the public materials for the synchronous motors and are determined by the order. Each machine is designed individually, and the documentation goes through 3 stages.
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