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公开(公告)号：US20250019202A1
公开(公告)日：2025-01-16
申请号：US18769852
申请日：2024-07-11
Applicant: Otis Elevator Company
Inventor： Guosong Li
Abstract: A method for detecting the state of a brake, the method including adjusting the current used in a braking coil of the brake, so that a braking component of the brake moves away from a first position to a second position; collecting a first current of the braking coil when the braking component leaves the first position; determining a first electromagnetic force according to a preset relationship model based on the first current; calculating a second electromagnetic force based on the first electromagnetic force; adjusting the current in the braking coil when the braking component is in the second position, so that the braking component leaves the second position; collecting a second current of the braking coil when the braking component leaves the second position; and determining a gap from the preset relationship model based on the second electromagnetic force and the second current.
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公开(公告)号：US20240217774A1
公开(公告)日：2024-07-04
申请号：US18388429
申请日：2023-11-09
Applicant: Otis Elevator Company
Inventor： Guosong Li
Abstract: A device and method for implementing an elevator safety function. A device for implementing an elevator safety function includes: a primary braking device configured to perform a holding brake operation when being de-energized; an auxiliary braking device configured to perform a holding brake operation when being de-energized; a safety function control unit selectively coupled with an elevator motor and configured to determine whether to activate the auxiliary braking device to perform the holding brake operation based on magnitude of back electromotive force of the elevator motor; and a switching device configured to couple the elevator motor with the safety function control unit after the primary braking device is de-energized.
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公开(公告)号：US20230391584A1
公开(公告)日：2023-12-07
申请号：US18070089
申请日：2022-11-28
Applicant: Otis Elevator Company
Inventor： Guosong Li
CPC classification number: B66B5/0025 , B66B5/02
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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公开(公告)号：US20230278829A1
公开(公告)日：2023-09-07
申请号：US17977048
申请日：2022-10-31
Applicant: Otis Elevator Company
Inventor： Hua Zhou , Guosong Li
CPC classification number: B66B5/0031 , B66B5/027
Abstract: A fault monitoring device and method for elevator motor and computer-readable storage medium on which computer programs for implementing the method are stored. A fault monitoring device for an elevator motor, includes: a 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. determining one or more components of a stator coil current at one or more characteristic frequencies from a measurement of the stator coil current of the elevator motor; and B. determining, based on the one or more components, whether a fault of turn-to-turn short circuit occurs in the stator coil.
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公开(公告)号：US20220306426A1
公开(公告)日：2022-09-29
申请号：US17525124
申请日：2021-11-12
Applicant: Otis Elevator Company
Inventor： Guosong Li
Abstract: A smooth braking control method for an elevator, a smooth braking control device for an elevator, and an elevator brake. The elevator is provided with an elevator brake including a fixed part and a moving part, and in a first state, by driving the moving part to move toward an elevator power device so that a friction member in the moving part contacts the elevator power device, the elevator brake provides a braking force to stop an elevator car, and in a second state, by outputting an electromagnetic force from an electromagnetic member in the fixed part, the friction member is disengaged from the contact with the elevator power device.
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Patent Agency Ranking
公开(公告)号：US20220281713A1
公开(公告)日：2022-09-08
申请号：US17523986
申请日：2021-11-11
Applicant: Otis Elevator Company
Inventor： Guosong Li , Hua Zhou
Abstract: A brake, a method for judging its state, a traction machine, and an elevator system. The traction machine and the elevator system include the brake. The brake includes a moving plate, and a fixed element having a fixed position relative to a base of the brake, and the brake further includes a first solenoid coil and a first ferromagnetic body; the first solenoid coil is disposed on one of the moving plate and the fixed element, the first ferromagnetic body is disposed on the other of the moving plate and the fixed element, a relative position of the first solenoid coil and the first ferromagnetic body is set such that the inductance of the first solenoid coil can change with the distance between the moving plate and the fixed element.
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公开(公告)号：US20230286777A1
公开(公告)日：2023-09-14
申请号：US17964591
申请日：2022-10-12
Applicant: Otis Elevator Company
Inventor： Guosong Li , James Leo Hubbard, III
CPC classification number: B66B5/0025 , G01R23/16 , B66B5/02 , B66B1/3461 , B66B5/0037
Abstract: A fault detection method and device for elevator power equipment and an elevator system. The method includes acquiring running speed data of an actuator in the elevator power equipment, and using the corresponding running speed data when the elevator is at a first speed and within a preset duration as target data; obtaining time-domain signal data of acceleration by calculation according to the target data, obtaining frequency-domain signal data of acceleration by conversion according to the time-domain signal data; comparing peak frequencies that form waveform peaks in the frequency-domain signal data with characteristic frequencies of the elevator power equipment, and determining the elevator power equipment to be faulty when at least one first frequency is detected in the peak frequencies, wherein the first frequency matches one of the characteristic frequencies and the amplitude thereof exceeds a preset threshold.
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公开(公告)号：US20220281717A1
公开(公告)日：2022-09-08
申请号：US17522357
申请日：2021-11-09
Applicant: Otis Elevator Company
Inventor： Guosong Li , Hua Zhou
Abstract: An elevator brake wear detection method, an elevator brake wear detection device and an elevator brake. The elevator brake includes a fixed part with an electromagnetic member and a moving part with a friction member; in a first state, the elevator brake drives the moving part to move toward an elevator power device and contact the elevator power device through the friction member to provide a braking force to stop an elevator car, and in a second state, the elevator brake provides an electromagnetic force through the electromagnetic member to disengage the friction member from the contact with the elevator power device.
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公开(公告)号：US20220281716A1
公开(公告)日：2022-09-08
申请号：US17525148
申请日：2021-11-12
Applicant: Otis Elevator Company
Inventor： Guosong Li
Abstract: An elevator brake performance detection method includes controlling an input voltage or current of the electromagnetic member so that the elevator brake enters the braking state, and recording a corresponding current data trajectory of the electromagnetic member based on time characteristic; determining a first target point and a second target point in the current data trajectory according to the current data trajectory, the first target point and the second target point being a first peak point in the current data trajectory, and a start point at which the current value changes from decreasing to increasing in the current data trajectory, respectively; and calculating a time difference between the first target point and the second target point as a braking time of the elevator brake.
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公开(公告)号：US20230382686A1
公开(公告)日：2023-11-30
申请号：US17965376
申请日：2022-10-13
Applicant: Otis Elevator Company
Inventor： Guosong Li
CPC classification number: B66B5/0031 , B66B3/002 , B66B5/02 , B66B5/0025 , G01R27/2611 , G06F30/27
Abstract: A self-checking device and method for an elevator braking device and an elevator system. The self-checking device includes an inductance testing module configured to measure an electromagnetic brake coil inductance L of the braking device; and a processing module electrically connected to the inductance testing module, and storing a mathematical model of an air gap a between the movable plate and the static plate with respect to the brake coil inductance L in a brake state; the processing module is configured to execute a checking mode in the brake state of the braking device, and in the checking mode, the processing module receives a current inductance L0 measured by the inductance testing module, calculates a current air gap a0 based on the mathematical model stored, and determines a wear degree of the friction lining based on the current air gap a0 calculated.
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