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Control Device for Rotating Machine of Elevator

  • US 20070227828A1
  • Filed: 10/28/2004
  • Published: 10/04/2007
  • Est. Priority Date: 10/28/2004
  • Status: Active Grant
First Claim
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1. A control device for controlling speed of a rotating machine driving an elevator without using a speed sensor, the control device comprising:

  • speed command signal generating means for generating a rotational speed command for the rotating machine; and

    speed sensor-less control means for controlling a voltage applied to the rotating machine without using the speed sensor, based on the rotational speed command issued from the speed command signal generating means, wherein the speed command signal generating means changes an acceleration running curve in a deceleration interval in accordance with moving direction and load of a car of the elevator to generate the rotational speed command.

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