PM4 Powerful permanent-field synchronous motors

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PM4 Powerful permanent-field synchronous motors


Having proven itself for years as a powerMELA® drive solution in mobile drive technology, Baumüller has now integrated its permanent magnet synchronous motor into its b maXX 5000 controller concept. The motor is available in the power classes of 40, 80, 140 and 200* kW and, in addition to the electromagnetic torque as a result of the Lorentz force, generates an additional reluctance torque. When used with the b maXX 5000, both torques — the electromagnetic and the reluctance torque — can be used, enabling optimized operation and high power density.

*in concept phase



Technical data PM4


PM4-100BO67W30-6*, PM4-132K67F30-6, PM4-132L67F30-6

Subject to alterations. The stated data are maximum values.
For details please have a look in the technical documentations.

* in development


  • Permanent-field synchronous motor with deeply-buried magnets
  • Optimized efficiency electric motor (up to 97%)
  • Integrated or external electronic
  • Robust construction (protection class up to IP6K9K)
  • Direct conductor cooling with insulation oil for the 80 kW and 140 kW versions
  • Water cooling for the 40 kW motor, oil cooling optional
  • Cooling with industry standard solutions
  • Field weakening up to 6000 rpm at constant power
  • High coolant inlet temperature up to 65°C

Product advantage:

  • Wide range of constant output due to use of field weakening
  • Mechanical protection of the magnets
  • Magnetic flux density
  • High power density
  • Direct conductor cooling
  • Compact design

Customer benefit:

  • Optimum adjustment to the load profile — high torque in the basic speed range and constant power at up to twice the basic speed
  • Long running life through robust construction
  • Excellent power output
  • Low weight, small installation footprint, easier integration into existing vehicle designs and tight spaces
  • Higher allowable coolant inlet temperature enables a smaller dimensioning of the heat exchanger

PM4 Powerful permanent-field synchronous motors

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