Induction motor MKH

690 Vsquirrel-cage rotorwater-cooled

Requirements for cutter head motors in tunnel construction
Cutter head motors are specialized electric motors installed in tunnel-boring machines (TBMs) to drive and rotate the cutter head, enabling excavation through rock and soil. Motor selection depends on geological conditions, bore diameter and tunnel length, and must consider torque, power, cooling and protection for continuous heavy-duty operation.

Applications

• Road and rail tunnels
• Subway lines
• Mining and excavation projects

Technology and trends
Recent developments focus on increased power density, water-cooling systems, electronic monitoring and compatibility with variable-speed drives to improve efficiency, service intervals and environmental performance.

Product offering
ELIN Motoren supplies cutter head motors and tailored electric drives. Main variants include:

• MKH-CHM — low-voltage squirrel-cage rotor, water-cooled cutter head motor. Ratings: up to 450 kW, up to 3000 rpm, up to 690 V. Standards/markings: IC7A0W7, TEWC.
• MKH-SafeSet — low-voltage squirrel-cage rotor, water-cooled, with SafeSet option. Ratings: up to 450 kW, up to 3000 rpm, up to 690 V. Standards: IEC 60034, NEMA MG1.
• MKH-SmartSet — low-voltage squirrel-cage rotor, water-cooled, with SmartSet option. Ratings: up to 450 kW, up to 3000 rpm, up to 690 V. Standards: IEC 60034, NEMA MG1.

Characteristics / technical specifications

• Function: drive and rotate the cutter head of tunnel-boring machines
• Design: low-voltage squirrel-cage motors (MKH series), water-cooled
• Speed: up to 3000 rpm
• Power: up to 450 kW
• Voltage: up to 690 V
• Protection / standards: CSA-C22.2 No.100-14, IEC 60034, UL1004 (dependent on configuration)
• Customization: motors and drives can be adapted to project-specific requirements
• Focus: higher power density, efficiency and reduced maintenance through design and materials