公开(公告)号：US12066505B2

公开(公告)日：2024-08-20

申请号：US17811977

申请日：2022-07-12

Applicant: HIOKI E.E. CORPORATION

Inventor： Tadashi Iijima

IPC: G01R31/72 ,  G01R31/34

CPC classification number: G01R31/72 ,  G01R31/346

Abstract: The characteristics of a winding to be tested is allowed to be analyzed more easily and in a shorter time. A testing instrument 1 includes an impulse voltage application capacitor Cs having one end connected to an external terminal T2, a switch SW and a current limiting resistor Rs connected in series between another end of the impulse voltage application capacitor Cs and an external terminal T1, and a parameter calculator 5. The parameter calculator 5 calculates at least one of the value of the equivalent capacitor Cd, the value of the equivalent inductor Ld and the value of the equivalent resistor Rd by performing regression analysis using a measured value of a voltage Vcd in an analysis time period Ta from turning on of the switch SW to start of resonance based on the equivalent inductor Ld, the equivalent capacitor Cd and the equivalent resistor Rd pertaining to a winding 11.

公开(公告)号：US12050237B2

公开(公告)日：2024-07-30

申请号：US17434324

申请日：2020-02-27

Applicant: Westinghouse Electric Company LLC

Inventor： Gregory E. Falvo ,  William S. Struzenski ,  Bruce A. P. Farver ,  Vasilios Zaharis

IPC: G21C17/00 ,  G01R19/00 ,  G01R31/72 ,  G21C7/14

CPC classification number: G01R19/0046 ,  G01R31/72 ,  G21C7/14 ,  G21C17/00

Abstract: Disclosed is a diagnostic apparatus structured to be electrically connected with a coil stack of a drive mechanism of a control device of a nuclear reactor. The coil stack has a plurality of coils. The diagnostic apparatus includes a power supply and a controller including a processor and a memory that stores a number of routines including a number of instructions. When executed on the processor the instructions cause the diagnostic apparatus to apply to a coil a voltage that varies as a function of time, detect a current in the coil as a function of time, identify in the current a first inflection point and a second inflection point, and determine, based upon an electronic evaluation that includes the first inflection point and the second inflection point, that the coil is one of functioning properly and in a state of at least partial failure.

公开(公告)号：US20240223018A1

公开(公告)日：2024-07-04

申请号：US18528722

申请日：2023-12-04

Applicant: AIRA, INC.

Inventor： Eric Heindel Goodchild ,  Camron Vossberg

IPC: H02J50/40 ,  G01R31/40 ,  G01R31/72 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/90

CPC classification number: H02J50/402 ,  G01R31/40 ,  G01R31/72 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/90

Abstract: Systems, methods and apparatus for wireless charging are disclosed. A test apparatus has a receiving head configured to provide a measurement signal representative of electromagnetic flux received from one or more transmitting coils of a wireless charging surface, a numerically-controlled stage configured to position the receiving head at a selected point in three-dimensional space above wireless charging surface, and a processor configured to cause the numerically-controlled stage to position the receiving head at the selected point in three-dimensional space, and use the measurement signal to determine magnitude of the electromagnetic flux or power received from the wireless charging surface proximate to the selected point in three-dimensional space.

公开(公告)号：US11959978B2

公开(公告)日：2024-04-16

申请号：US17632760

申请日：2020-08-04

Applicant: Sembcorp Industries Ltd ,  National University of Singapore

Inventor： Subash Chandar Athikessavan ,  Sanjib Kumar Panda ,  Shiva Shankaranarayanan Muthuraj

IPC: G01R31/72 ,  G01R31/34 ,  G01R31/52

CPC classification number: G01R31/72 ,  G01R31/343 ,  G01R31/346 ,  G01R31/52

Abstract: A method of detecting a rotor bar fault of an electrical machine, said method comprising, acquiring a set of online signals from the electrical machine over a period, said set of online signals comprising at least one vibration signal, and a summed signal of magnetic flux signals, each magnetic flux signal obtained from a respective flux sensor positioned on an external surface of the electrical machine; extracting an online anomaly indicator value from the set of online signals; comparing the online anomaly indicator value with a baseline anomaly indicator value of a corresponding loading condition; and determining presence of the broken or cracked rotor when the online anomaly indicator value deviates from the baseline anomaly indicator value by a threshold.

公开(公告)号：US11852092B2

公开(公告)日：2023-12-26

申请号：US17385274

申请日：2021-07-26

Applicant: AISIN CORPORATION

Inventor： Kouki Ojima ,  Satoshi Sakai ,  Toshihisa Habiro ,  Yuta Kawai

IPC: F02D41/20 ,  H01F7/18 ,  G01R31/72 ,  G01R31/28

CPC classification number: F02D41/20 ,  H01F7/18 ,  F02D2041/2027 ,  F02D2041/2055 ,  G01R31/2829 ,  G01R31/72

Abstract: An electric current detection apparatus, the electric current detection apparatus is configured to detect an electric current flowing in a solenoid configured to be electrified by a PWM control, the apparatus includes a switch, an electric current value detection portion configured to detect a first electric current value at a first timing corresponding to a timing when the switch transitions from a closed state to an open state, the electric current value detection portion being configured to detect a third electric current value at a third timing, and a second electric current value calculation portion configured to calculate a second electric current value on the basis of the first electric current value and the third electric current value, the second electric current value being an electric current value of the electric current at the second timing.

公开(公告)号：US11788879B2

公开(公告)日：2023-10-17

申请号：US17053099

申请日：2019-05-15

Applicant: Maschinenfabrik Reinhausen GmbH

Inventor： Karsten Viereck ,  Anatoli Saveliev

IPC: G01H3/00 ,  G01R31/62 ,  G01R31/72 ,  G01P15/00

CPC classification number: G01H3/00 ,  G01P15/00 ,  G01R31/62 ,  G01R31/72

Abstract: A system analyzes a state of an inductive operator. The system includes a measuring device that is configured to: detect an acoustic reference signal and a plurality of operating variables, which can change over time, of the inductive operator or a reference inductive operator during a reference time period; and detect an acoustic signal and the operating variables during a productive time period. The system also includes an evaluating device that is configured to: generate a reference data set from the reference signal and a productive data set from the acoustic signal; perform a regression analysis of the reference data set and thereby create a model for description of the acoustic reference signal by the operating variables; and generate a state evaluation of the inductive operator from a difference between the productive data set and values modelled in accordance with the model.