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UNINTENDED MOVEMENT GOVERNOR

  • US 20090288920A1
  • Filed: 08/06/2009
  • Published: 11/26/2009
  • Est. Priority Date: 02/21/2007
  • Status: Active Grant
First Claim
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1. An electronic unintended movement governor, comprising:

  • an input for car position data;

    a device that determines the speed of the elevator;

    a plurality of limit values for permitted movement of the elevator car, including a limit value of the maximum permitted speed of the elevator;

    an overspeed monitoring device that controls at least one stopping appliance of the elevator car when the speed of the elevator car exceeds the limit value of the maximum permitted speed,wherein the limit values for the permitted movement of the elevator car comprise a limit value for the distance traveled by the elevator car as well as a time delay, and the electronic unintended movement governor further comprises a device that determines the distance traveled by the elevator car as well as at least two separate controls that control a stopping appliance of the elevator car, said at least two separate controls comprising;

    a first control for immediately controlling at least one stopping appliance of the elevator car; and

    a second control for controlling at least one stopping appliance of the elevator car when the distance traveled by the elevator car and/or the time delay exceeds a predefined limit value,and wherein the control of the stopping appliance of the elevator car comprises a control of the machinery brake as well as the disconnection of the power input circuit of the motor.

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