Special drives & high-speed direct drives

Synchronous Motors (permanent magnet excited)


  • Small, lightweight construction thanks to a very high power density
    Weight reduction by over 40%
    Performance increase by over 100%
  • Energy-saving due to high efficiency
    Efficiency increase by up to 20%
  • High overload capacity up to > 3 x rated torque
  • Constant speed up to approx. three times the rated output
  • Robust, lifetime-lubricated, maintenance-free bearing
  • Easy to install since there is no speed feedback


Type Weight
Rated output [kW]
 [kg] S 1
400 Hz 600 Hz
12,000 rpm 18,000 rpm
KN 21.04-4S 1.8 0.5 0.65
KN 22.08-4S 2.5 1.0 1.3
KN 24.12-4S 3.2 1.5 2.0
KR 35.1-4S 3.8 1.5 2.0
KR 35.5-4S 4.7 2.0 3.0
KR 35.7-4S 5.5 3.0 4.0

We can provide you with additional performance specifications and speeds upon request.
Available as direct drive or with direct tool holding system.

Direct Drives for foot- or flange-mounting

How you benefit

  • Direct drive with low maintenance since there is no mechanical transmission
  • Motors designed especially for converter operations
  • Customer-specific performance/speed adjustment capability
  • High degree of energy efficiency with low-loss materials
  • A variety of models, all available from our portfolio
  • Robust bearing
  • Compact design
  • Variable mounting flange upon request
  • Speeds of up to 30,000 rpm

All motors are also available with increased dust protection and increased water protection.