Method and apparatus for monitoring operational state of elevator system
AssigneeOtis Elevator Company
InventorGuosong Li
Life of this patent
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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.
Claims31
A device for monitoring operating status of an elevator system, the elevator system comprising a three-phase motor and an inverter for driving the three-phase motor, the device comprising:
- 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 the three-phase motor;
- and
- B. displaying on the display unit a trajectory generated by the two-dimensional coordinate transformation value.
A device for monitoring quality of power supply of a power grid, the device comprising:
- 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 voltage or current from the power grid;
- and
- B′. displaying on the display unit a trajectory generated by the two-dimensional coordinate transformation value.
A method for monitoring operating status of an elevator system, the elevator system comprising a three-phase motor and an inverter for driving the three-phase motor, the method comprising:
- A. acquiring a two-dimensional coordinate transformation value of a three-phase current of the three-phase motor;
- and
- B. displaying a trajectory generated by the two-dimensional coordinate transformation value.
A method for monitoring quality of power supply of a power grid, the method comprising:
- A′. acquiring a two-dimensional coordinate transformation value of a three-phase voltage or current from the power grid;
- and
- B′. displaying a trajectory generated by the two-dimensional coordinate transformation value.
Dependencies are inferred from the claim text.