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Rotation Brake Method And Device For Working Machine

  • US 20070273316A1
  • Filed: 03/31/2005
  • Published: 11/29/2007
  • Est. Priority Date: 04/02/2004
  • Status: Active Grant
First Claim
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1. A method for braking a revolving superstructure of a work machine, comprising:

  • employing a permanent magnet-type electric motor as a swiveling electric motor for drivingly swiveling said revolving superstructure;

    in an emergency, allowing electric power generated in said swiveling electric motor due to inertial rotation to be consumed in a braking resistor outside said swiveling electric motor to provide an electric braking action, said electric braking action providing braking and decelerating the revolving superstructure; and

    activating a mechanical brake when a rotation speed of the revolving superstructure becomes equal to or lower than a preset value during said decelerating.

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