METHOD AND APPARATUS FOR MONITORING OPERATIONAL STATE OF ELEVATOR SYSTEM
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United States of America Patent
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Issued Date -
Dec 7, 2023
app pub date -
Nov 28, 2022
filing date -
Jun 7, 2022
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Abstract
A device and method for monitoring operating status of an elevator system, a device and method for monitoring quality of power supply of a power grid, and a computer-readable storage medium on which a computer program for implementing the above methods is stored. A device for monitoring operating status of an elevator system, includes: a display unit; memory; a processor coupled with the memory; and a computer program stored on the memory and running on the processor, the running of the computer program causes: A. acquiring a two-dimensional coordinate transformation value of a three-phase current of a three-phase motor system; and B. displaying on the display unit a trajectory generated by the two-dimensional coordinate transformation value.
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