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· Rotor

As the central elements of the electric motor, the rotor shaft and the complete rotor assembly are capable of high speeds and huge torques that the motor transmits on to the downstream elements. For this reason the components need to fit together precisely with very tight tolerances, so it becomes very important to inspect each one for highest quality.

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Depending on the type of electric motor, different rotor versions are used:

  • Permanent magnet rotor for brushless synchronous motors
  • Wound rotors for externally excited synchronous motors
  • Squirrel cage rotors for asynchronous motors

Marposs can propose several products and applications dedicated to the process control along the complete manufacturing chain, as well as solutions and machines for the quality check, the functional testing and the complete rotor assembly

Process control

  • Process control and monitoring in the turning and machining operations of the shaft
  • Process control in the grinding operations
  • Monitoring of the stamping process in the production of sheet metal stack

Quality check

  • Special contact gauging
  • Flexible and optical gauges
  • Multiple gauging applications

Functional testing

  • Back EMF test for permanent magnet rotors
  • Insulation test for wound rotors
  • Functional test for squirrel cage rotors


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