公开(公告)号：US20240319237A1

公开(公告)日：2024-09-26

申请号：US18612310

申请日：2024-03-21

Applicant: Fluke Corporation

Inventor： Jeffrey Elrod ,  Michael Perry ,  Joseph Ferrante ,  George Allen ,  Jeffrey C. Hudson ,  John Gilbert

IPC: G01R19/25

CPC classification number: G01R19/25

Abstract: A single handheld multimeter device includes two or more independent measurement channels that are completely electrically separated and independent from one another. Each measurement channel has its point of reference, typically configured to be coupled to the ground. Measurements by the two or more independent measurement channels can be conducted concurrently, and the measurement results of the two channels can be processed and displayed together.

公开(公告)号：US20240272209A1

公开(公告)日：2024-08-15

申请号：US18567465

申请日：2022-06-14

Applicant: Sistemi Corp.

Inventor： Martin Guthrie ,  Sean Simmons

IPC: G01R19/25

CPC classification number: G01R19/25

Abstract: A circuit topology for measuring current over a wide dynamic range using multiple series sense resistors and diode voltage clamping is described. A current sense network uses a diode clamping technique to reduce the voltage drop across the series network such that it can be used in a power supply circuit with minimal impact on output voltage regulation. The circuit topology allows for overlapping current measurement ranges that can be merged together to provide a wide dynamic range. The circuit topology does not dynamically switch current sense resistors (or capacitors) and avoids unintended noise injection caused by such switching, and is suitable for measuring a wide dynamic range of current in real time.

公开(公告)号：US20240230815A1

公开(公告)日：2024-07-11

申请号：US18478384

申请日：2023-09-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rushil KISHORE KUMAR ,  Jasjot Singh CHADHA ,  Atul AGRAWAL ,  Anand KANNAN ,  Nikhil GOYAL

IPC: G01R35/00 ,  G01R19/25

CPC classification number: G01R35/005 ,  G01R19/25 ,  H04R29/001

Abstract: A circuit includes: a driver circuit; a sense resistor; a test circuit; a current sense circuit; a calibration controller; and a switch controller. The current sense circuit is configured to: obtain first sense signals responsive to a test voltage applied to the sense resistor by the test circuit, the test voltage being a direct-circuit voltage; and obtain second sense signals responsive a supply voltage applied to the sense resistor by the driver circuit, the supply voltage including a common-mode voltage. The calibration controller is configured to calibrate the current sense circuit responsive to the first sense signals and the second sense signals. The switch controller is configured to update switch control signals provided to the driver circuit responsive to current sense signals obtained by the calibrated current sense circuit.

公开(公告)号：US20240201230A1

公开(公告)日：2024-06-20

申请号：US18066687

申请日：2022-12-15

Applicant: Infineon Technologies AG

Inventor： Christoph KRALL ,  Gernot BINDER

IPC: G01R15/20 ,  G01R19/25

CPC classification number: G01R15/207 ,  G01R19/25

Abstract: A current sensor includes a selector switch configured to output a first pair of differential sensor signals and a second pair of differential sensor signals if configured in a first switch state, and output a third pair of differential sensor signals and a fourth pair of differential sensor signals if configured in a second switch state; and a differential circuit coupled to the selector switch. If the selector switch is configured in the first switch state, the differential circuit is configured to generate a first output signal representative of a first difference between the first and the second pairs of differential sensor signals. If the selector switch is configured in the second switch state, the differential circuit is configured to generate a second output signal representative of a second difference between the third and the fourth pairs of differential sensor signals.

公开(公告)号：US20240168131A1

公开(公告)日：2024-05-23

申请号：US18376657

申请日：2023-10-04

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Woosung KIM ,  Hyunil BYUN ,  Dongjae SHIN ,  Changbum LEE ,  Changgyun SHIN ,  Tatsuhiro OTSUKA

IPC: G01S7/481 ,  G01R19/25 ,  G01S17/931

CPC classification number: G01S7/4811 ,  G01R19/25 ,  G01S7/4814 ,  G01S17/931

Abstract: An optical device and a light detection and ranging (LiDAR) device each including a heater combined temperature sensor are disclosed. The optical device including the heater combined temperature sensor may include a heater, an analog-to-digital converter (ADC) configured to measure a voltage of the heater, a memory storing a measurement value, and a micro-controller configured to estimate a temperature of the heater based on relationship between the measurement value and the temperature.

公开(公告)号：US20240110956A1

公开(公告)日：2024-04-04

申请号：US17790584

申请日：2021-06-16

Applicant: CHINA SOUTHERN POWER GRID DIGITAL GRID RESEARCH INSTITUTE CO., LTD.

Inventor： Peng LI ,  Qiancheng LV ,  Bing TIAN ,  Licheng LI ,  Bofeng LUO ,  Zhong LIU ,  Zhiming WANG ,  Hongdi SUN ,  Xu YIN ,  Jiaming ZHANG

IPC: G01R19/25 ,  G01R19/10

CPC classification number: G01R19/25 ,  G01R19/10

Abstract: A current sensor includes: four first uniaxial TMR chips and at least two second uniaxial TMR chips, each first uniaxial TMR chip and each second uniaxial TMR chip being located on the same virtual ring, wherein magnetic sensitive directions of the four first uniaxial TMR chips are perpendicular to a radius of the virtual ring, magnetic sensitive directions of two adjacent first uniaxial TMR chips are perpendicular to each other, magnetic sensitive directions of the two second uniaxial TMR chips are parallel to the radius of the virtual ring and opposite to each other, and the two second uniaxial TMR chips respectively have the same positions as two first uniaxial TMR chips; each first uniaxial TMR chip and each second uniaxial TMR chip are configured to collect a magnetic induction intensity, the magnetic induction intensity is configured to calculate a target current value of a to-be-measured wire.

公开(公告)号：US11946982B2

公开(公告)日：2024-04-02

申请号：US17090559

申请日：2020-11-05

Applicant: GRID20/20, Inc.

Inventor： W. Alan Snook, II ,  Joseph O. Beaudet ,  Sergio Angeli

IPC: G01R31/62 ,  G01R19/165 ,  G01R19/25 ,  G01R22/06 ,  G01R31/00 ,  G01R31/40 ,  G01R31/42 ,  H02S50/00 ,  H04Q9/00 ,  H04Q9/02 ,  G01K13/00 ,  H02S50/10 ,  H04L67/12

CPC classification number: G01R31/62 ,  G01R19/16538 ,  G01R19/25 ,  G01R19/2513 ,  G01R22/063 ,  G01R31/002 ,  G01R31/40 ,  G01R31/42 ,  H04Q9/00 ,  H04Q9/02 ,  G01K13/00 ,  H02S50/00 ,  H02S50/10 ,  H04L67/12 ,  H04Q2209/40 ,  H04Q2209/60 ,  Y04S40/18

Abstract: A transformer monitoring device has one or more voltage sensors and/or one or more current sensors integral with a housing for detecting a voltage of a power cable of a transformer. The transformer monitoring device can be configured to monitor voltage levels, and cause alerts to be issued if voltage levels drop and/or spike beyond operator-established tolerance(s). The transformer monitoring device further has one or more environmental sensors including a smoke sensor, ambient temperature sensor, external transformer temperature sensor, a fire/wildfire sensor, a humidity sensor, a noxious gases sensor, a seismic or vibration sensor, and/or a surface and/or ground temperature sensor configured to detect smoke, and/or temperature change indicators, and/or other environmental changes in an area surrounding the transformer, and a processor configured to monitor the smoke sensor, temperature sensors, and/or other environmental change sensors, the processor configured to transmit an alert if smoke, temperature and/or other environmental conditions are detected surrounding the transformer.

公开(公告)号：US11933820B2

公开(公告)日：2024-03-19

申请号：US17359190

申请日：2021-06-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yonghua Wu ,  Minxiang Zhang

IPC: G01R15/18 ,  G01R1/30 ,  G01R19/25 ,  H03F3/45 ,  H05K1/18

CPC classification number: G01R15/181 ,  G01R1/30 ,  G01R19/25 ,  H03F3/45475 ,  H05K1/181 ,  H05K2201/1003 ,  H05K2201/10151

Abstract: A current detection system, a current detection method, and a detection apparatus are provided. The current detection system includes a printed circuit board and N groups of amplification apparatuses, wherein N is a positive integer greater than or equal to 1. Each group includes at least one amplification apparatus. N Rogowski coils are mounted on the printed circuit board. The nth Rogowski coil is capable of being mounted concentric with the nth current-carrying conductor in N current-carrying conductors, which is perpendicular to a plane of the nth Rogowski coil. An output end of the nth Rogowski coil is connected to an input end of the first amplification apparatus in the nth group of the N groups of amplification apparatuses. The foregoing current detection system provides more convenience when being integrated into different electrical equipment, in particular when each group of amplification apparatus includes multiple amplification apparatuses.

公开(公告)号：US20240039552A1

公开(公告)日：2024-02-01

申请号：US18359504

申请日：2023-07-26

Applicant: Rohm Co., Ltd.

Inventor： Takashi MIYAKE

IPC: H03M1/34 ,  G01R19/25 ,  G01L9/00

CPC classification number: H03M1/34 ,  G01R19/25 ,  G01L9/0052

Abstract: An AD converter includes: an amplifier including first and second input ends; a capacitor connecting the first input end and an output end of the amplifier; a comparator including a first input end connected to the output end and a second input end; a first switch connected between an application end of the input voltage and the first input end; a second switch connected between a first node and application end of ground potential; and a controller performing ON/OFF control of the first and second switches, wherein the controller starts charging the capacitor by switching the first switch to ON state, thereafter discharge the capacitor by setting the second switch to ON state during offset regulation period to cancel increase in a charging amount of the capacitor, and measure discharging period from an end of the offset regulation period to switching of an output level of the comparator.

公开(公告)号：US20240030826A1

公开(公告)日：2024-01-25

申请号：US18375432

申请日：2023-09-29

Applicant: BYD COMPANY LIMITED

Inventor： Xiaobin Zhang

IPC: H02M3/335 ,  G01R15/18 ,  G01R19/25 ,  H02J7/00 ,  H02M1/42

CPC classification number: H02M3/33584 ,  G01R15/18 ,  G01R19/25 ,  H02J7/007 ,  H02M1/42 ,  H02M3/33592 ,  H02J2207/20 ,  H02M1/0009

Abstract: A DC-DC converter, an on-board charger, and an electric vehicle are disclosed. The DCDC converter includes: a first adjustment module, a resonance module, a second adjustment module, a current detection module, and a controller. The current detection module is configured to detect a current signal of the resonance module; and the controller is configured to control the first adjustment module and the second adjustment module to reduce an output power when the current signal is greater than a current threshold. By directly detecting the current signal of the resonance module, a high precision and a faster response are achieved.