公开(公告)号：US12105123B2

公开(公告)日：2024-10-01

申请号：US18348701

申请日：2023-07-07

申请人： Rohm Co., Ltd.

发明人： Satoru Nate ,  Akinobu Sawada ,  Natsuki Yamamoto

IPC分类号： G01R19/175 ,  H02M1/08 ,  H03K5/1536

CPC分类号： G01R19/175 ,  H02M1/083 ,  H03K5/1536

摘要： A zero-crossing detection circuit includes a logic unit and an input stop detection unit. The logic unit is configured to estimate a zero cross of an AC signal in accordance with at least one of a first monitoring target signal and a second monitoring target signal, respectively input through diodes from a first node and a second node between which the AC signal is applied, so as to generate a zero-crossing detection signal. The input stop detection unit is configured to compare the first monitoring target signal with the second monitoring target signal after giving an offset to one of them so as to generate an input stop detection signal. The logic unit is configured to fix a logic level of the zero-crossing detection signal in accordance with the input stop detection signal.

公开(公告)号：US12068056B2

公开(公告)日：2024-08-20

申请号：US17977249

申请日：2022-10-31

申请人： SK hynix Inc.

发明人： Young Sub Yuk ,  Jae Woo Song

IPC分类号： G11C7/20 ,  G01R19/175 ,  G11C7/22 ,  G11C11/4072

CPC分类号： G11C7/20 ,  G01R19/175 ,  G11C7/22 ,  G11C11/4072

摘要： A semiconductor chip includes a detection circuit configured to generate a discharge signal that is enabled when a voltage level of an external voltage is greater than a first set level and configured to generate a voltage control signal that is enabled when an output voltage is generated to have a voltage level of a ground voltage in a test mode, a charge discharge circuit configured to discharge charges of an output node that is included in a driving circuit when the discharge signal is enabled, and the driving circuit configured to generate the output voltage the voltage level of which rises up to a second set level by supplying charges from the external voltage to the output node in response to a driving signal a voltage level of which is decreased during an interval in which the voltage control signal is enabled.

公开(公告)号：US12066470B2

公开(公告)日：2024-08-20

申请号：US17597881

申请日：2020-07-30

申请人： 3M Innovative Properties Company ,  Connected Intelligence Systems Ltd.

发明人： Douglas B. Gundel ,  Udi Blich ,  Eyal Doron

IPC分类号： G01R25/00 ,  G01R19/175 ,  G01R35/00

CPC分类号： G01R19/175 ,  G01R35/005

摘要： Techniques, methods, systems and articles are described for monitoring electrical equipment of a power grid, identifying installation and/or configuration errors of such electrical equipment, and automatically correcting the errors. In one example, a system includes at least one processor and a plurality of sensors coupled to a multi-phase power line comprising a plurality of electrical cables that are each associated with a respective phase. The plurality of sensors are configured to generate sensor data that is indicative of one or more conditions of the electrical cables. The at least one processor is configured to receive the sensor data and determine, based at least in part on the sensor data, whether a sensor of the plurality of sensors is installed correctly. The at least one processor is also configured to perform an action in response to determining that the sensor is not installed correctly.

公开(公告)号：US20240272260A1

公开(公告)日：2024-08-15

申请号：US18428044

申请日：2024-01-31

申请人： Schneider Electric Industries SAS

发明人： Michel Hennequin ,  Stéphane Sicard ,  Roland Bohrer ,  Jonathan Caillou ,  Benoît Leprettre

IPC分类号： G01R35/00 ,  G01R15/16 ,  G01R19/175 ,  G01R25/00 ,  G06F13/38

CPC分类号： G01R35/005 ,  G01R15/16 ,  G01R19/175 ,  G01R25/005 ,  G06F13/38

摘要： A system for calibrating voltage measurements in a system for measuring electrical quantities includes a calibration device configured to determine a first reference time instant of a zero-crossing event of a voltage signal that it measures, and transmit a calibration message including the first reference time instant and a measured voltage amplitude value to at least one device for measuring electrical quantities. The at least one device for measuring electrical quantities is configured to receive the calibration message, extract the first reference time instant and the voltage amplitude, determine a second reference time instant, of zero crossing of the voltage signal measured locally, corresponding to the first reference instant, calculate a phase shift of the locally-measured voltage signal, as a function of the difference between the first and the second reference time instants and apply a phase and amplitude voltage calibration as a function of the voltage amplitude and of the phase shift.

公开(公告)号：US11860200B2

公开(公告)日：2024-01-02

申请号：US17644842

申请日：2021-12-17

申请人： TENDYRON CORPORATION

发明人： Dongsheng Li

IPC分类号： G01R19/175 ,  G01R19/25 ,  H04B3/54

CPC分类号： G01R19/175 ,  G01R19/2513 ,  H04B3/546 ,  H04B3/548

摘要： Provided is a zero crossing point signal output method, including: continuously receiving zero crossing point square wave signals, and periodically sampling zero crossing point square wave signals at a predetermined sampling frequency; acquiring sampling numbers of 1st to Mth zero crossing point square wave signals to obtain an average sampling number S, and calculating a first zero crossing point interval T1; setting a zero crossing point signal output interval as the first zero crossing point interval T1; continuously outputting zero crossing point signals with an interval being the zero crossing point signal output interval; obtaining sampling numbers of M+1th to M+Nth zero crossing point square wave signals, calculating a difference value between each of the sampling numbers and S, and obtaining an accumulated difference value Δs through calculation; when Δs is not within a predetermined change range, obtaining a second zero crossing point interval T2 and setting the zero crossing point signal output interval as T2; and when Δs is within the predetermined change range, keeping the zero crossing point signal output interval unchanged.

公开(公告)号：US11852661B2

公开(公告)日：2023-12-26

申请号：US17914748

申请日：2020-09-04

申请人： WILLFAR INFORMATION TECHNOLOGY CO., LTD.

发明人： Lv Fan ,  Wujuan Zhang ,  Feng Tian ,  Jun Li ,  Jun Li ,  Zhengquan Xie

IPC分类号： G01R19/00 ,  G01R19/175 ,  H04B3/54 ,  G01R19/165

CPC分类号： G01R19/175 ,  G01R19/16528 ,  H04B3/54

摘要： A method for extracting a characteristic signal from a power frequency signal includes steps of: S1, detecting a voltage half-wave zero-crossing area in a single voltage cycle in the power frequency signal by a signal; superimposing a voltage modulation signal on the voltage half-wave zero-crossing area, and superimposing an instantaneous pulse on a current cycle in the power frequency signal corresponding to the voltage half-wave zero-crossing area; generating the characteristic signal with current cycles and voltage cycles; S2, demodulating whether there is the voltage modulation signal in the power frequency signal, if so, executing step S3; and S3, demodulating the characteristic signal to obtain the current modulation signal and the voltage modulation signal respectively; and determining whether data corresponding to the current modulation signal and date corresponding to the voltage modulation signal are predetermined data, wherein if so, the characteristic signal exists. The method has strong anti-interference ability.

公开(公告)号：US11821928B2

公开(公告)日：2023-11-21

申请号：US17808298

申请日：2022-06-22

申请人： DELTA ELECTRONICS, INC.

发明人： Bo-Song Lin ,  Yu-Ming Hsu

IPC分类号： H02J7/00 ,  G01R19/175

CPC分类号： G01R19/175 ,  H02J7/0047

摘要： A charging apparatus includes a first terminal, a second terminal, a switch unit, a control unit, and a communication unit. The switch unit is turned on or turned off to control whether the first terminal is coupled to the second terminal. The control unit sets a first time from the switch unit receiving a control signal to the switch unit actually being turned on or turned off. The control unit and the electric vehicle mutually transmit a communication signal through the communication unit. The control unit calculates a second time when the current reaches to a zero point based on an abnormal state indicated by the communication signal, and calculates a third time when the switch unit operates at the zero point based on the first time and the second time, and provides the control signal to turn off the switch unit at the third time.

公开(公告)号：US20230371136A1

公开(公告)日：2023-11-16

申请号：US17745163

申请日：2022-05-16

申请人： WHIRLPOOL CORPORATION

发明人： Marco Mattioni ,  Giuseppe Tarantino

IPC分类号： H05B6/06 ,  H05B6/12 ,  G01R19/175

CPC分类号： H05B6/062 ,  H05B6/1245 ,  G01R19/175

摘要： A heating assembly for a cooking appliance includes at least one induction coil. A drive circuit is configured to control a coil current through the at least one induction coil. The drive circuit includes a first switching circuit operable to conduct the coil current and a second switching circuit operable to conduct the coil current. A sensing circuit is configured to detect a polarity of the coil current. A control circuit is configured to communicate a first activation signal to the first switching circuit during a first activation period. The control circuit is further configured to communicate a second activation signal to the second switching circuit during a second activation period. The control circuit is further configured to control a delay between the first activation signal and the second activation signal based on the polarity of the coil current.

公开(公告)号：US11671002B2

公开(公告)日：2023-06-06

申请号：US17244920

申请日：2021-04-29

申请人： Richtek Technology Corporation

发明人： Kuo-Chi Liu ,  Chung-Lung Pai ,  Ta-Yung Yang

IPC分类号： H02M1/00 ,  H02M3/07 ,  H02M3/158 ,  H02M3/00 ,  G01R19/175

CPC分类号： H02M1/0095 ,  H02M3/01 ,  H02M3/07 ,  H02M3/158 ,  G01R19/175

摘要： A resonant switching power converter includes: plural capacitors; plural switches; at least one charging inductor; at least one discharging inductor; a controller which generates a charging operation signal and at least one discharging operation signal; and at least one zero current detection circuit which detects a charging resonant current flowing through the charging inductor in a charging process and/or detect a discharging resonant current flowing through the discharging inductor in a discharging process. When detecting that a level of the charging resonant current or a level of the discharging resonant current is zero, the zero current detection circuit generates at least one zero current detection signal which is sent to the controller. The controller determines start time points and end time points of the charging process and the discharging process according to the zero current detection signal. There can be plural discharging processes.

公开(公告)号：US11664755B2

公开(公告)日：2023-05-30

申请号：US17564990

申请日：2021-12-29

申请人： DENSO CORPORATION

发明人： Yuichi Seo

IPC分类号： H02P23/14 ,  G01R19/175 ,  H02P27/08

CPC分类号： H02P23/14 ,  G01R19/175 ,  H02P27/08

摘要： An arithmetic device and a motor drive device including the arithmetic device capable of performing high accuracy motor current calculation, include a control unit performing an arithmetic processing including: acquire a duty ratio; calculate a waiting time according to the duty ratio and a waiting coefficient; detect a shunt current value at a detection timing after lapse of the waiting time; acquire, as a zero-cross current value, the shunt current value; calculate an average value using the shunt current values; and calculate an effective current value by correcting the average value using a correction coefficient.