Helmke | Elektrische Maschinen und Antriebe

Large motors - Responding to customer needs

Our particular strengths :
Tailor-made motors – Design, manufacture and reverse engineering of rotating machines. Flexible manufacturing procedures allow customer specific products which will perform in the most
demanding environments.

Duplicate – interchangeable – replacement machines
Re-manufacture machines originally produced by other makers
reduced losses for optimized efficiencies
design for low noise emissions
low starting currents while maintaining high starting torque
Keyed bar rotor cage construction providing extremely rugged rotor construction.
Design flexibility. Optimised stator and rotor slot numbers, independently selectable.

Examples:

	Compressor drive for polypropylene plant in Saudi Arabia Type DKK 500-02 600 kW 13,800 V, 50 Hz IM B3, IP 55, IC 611 Design with sleeve bearings for flushing oil connection Noise-damped design for max. 85 dB(A)

	Cement mill drive in Sweden for ball mill drive 4,700 kW 6,600 V, 50 Hz 991 rpm 2nd shaft end for rated torque Special design with sleeve bearings and hydrostatic for starting and positioning of the mill Electrically and mechanically exchangeable to existing ASEA motors Air-/water heat-exchanger with leakage-water detector Starpoint terminal box with differential protection transformers

	Pump drive for Yukos Oil Russia Order from June 2005 Prototype for design in Group II C for hydrogen Three-phase squirrel cage motor EExde II CT4 Type DEDOR 800-04 2,500 kW, 6,000 V, 50 Hz, 4pol IM B3, IP 55, IC 511 13,000 kg

	Motor for an oxygen-reciprocating compressor in a smeltery in Belarus Three-phase squirrel cage motor with water cooling 800 kW 10,000 V 50 Hz 596 rpm Adapted to the characteristics of the reciprocating compressor (mechanically and electrically) Design with lubricated flange shaft

	Motor for pump drive system for a refinery in Russia Three-phase squirrel cage motor category 2 Type of protection II2G EExpe II T3 Certificate ATEX 3,000 kW 6,000 V 50 Hz 1,493 rpm Adapted to original foundation Short-term modification of protection II2G EExde II T3 to II2G EExpe II T3

	Motor for machine tool in Russia Reproduction of a Siemens motor Three-phase squirrel cage motor 1,000 kW 6,000 V 50 Hz 1,489 rpm Special design for high load peak

	Raw Mill Drive Cement Plant 1,850 kW 6,600 V 50 Hz 992 rpm 2 shaft ends special construction to match the existing foundation additionally suitable to replace two existing ventilator drives electrically and mechanically (Multi-spare)

	Sinter blower drive for steel plants three-phase slipring motor 3,600 kW 5,000 V 50 Hz 1,485 rpm matched to original foundation

	Pump drive for main cooling circuit in a power plant in Columbia three-phase slipring motor 430 kW 4,160 V 60 Hz 708 rpm special design for vertical use

	Compressor drive for chemical plant three-phase squirrel cage motor extended shaft end frame type C2 additional pedestal bearing for belt drive

	Chopper drive in Spain slipring motor for speed controlled applications transmission gear for belt pulley on common base frame

	Cement mill drive in Germany drive for a vertical roller mill 3,270 kW 6,000 V 742 rpm special designed with an additional hydrostatic installation in order to raise the rotor in the sleeve-bearing shells.

	Fan drive in a power plant three-phase squirrel-cage motor 2,000 kW 6,300 V 50 Hz 989 rpm reproduction for an already existing motor

	Refiner drive Foot and shaft dimensions according to customer´s specifications three-phase slipring-motor 7,100 kW 6,000 V 50 Hz 1,492 rpm rotor data: 2,300 V, 1,860 A 6 PT100 in the winding 2 PT100 in sleeve bearings two shaft ends anti-condensation heater