公开(公告)号：US20240283347A1

公开(公告)日：2024-08-22

申请号：US18413743

申请日：2024-01-16

Applicant: Enphase Energy, Inc.

Inventor： Michael J. HARRISON

IPC: H02M1/00 ,  G01R15/18 ,  G01R19/25 ,  H01F27/42

CPC classification number: H02M1/0009 ,  G01R15/18 ,  H01F27/427 ,  G01R19/25

Abstract: An apparatus configured for use with a microinverter of an energy management system is provided. For example, apparatus can comprise a cascaded current transformer configuration comprising a first current transformer having a first primary winding configured to couple to a secondary winding of a power transformer of the microinverter and having a first secondary winding coupled to a second primary winding of a second current transformer having a second secondary winding coupled to a measurement device configured to measure a current of the microinverter.

公开(公告)号：US20240203641A1

公开(公告)日：2024-06-20

申请号：US18402760

申请日：2024-01-03

Applicant: EM CORETECH INC. ,  UNIST( ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)

Inventor： Jin Gook KIM ,  Sang Yeong JEONG

IPC: H01F27/42 ,  G01R19/165 ,  H01F17/00 ,  H01F17/06 ,  H02M1/44 ,  H03F1/30

CPC classification number: H01F27/427 ,  G01R19/16576 ,  H02M1/44 ,  H03F1/305 ,  H01F2017/0093 ,  H01F2017/065

Abstract: This application relates to an active current compensation device which actively compensates for a noise occurring in a common mode in each of two or more high-current paths. In one aspect, the active current compensation device includes a sensing unit configured to generate an output signal corresponding to a common-mode noise current on each of the two or more high-current paths, and an amplification unit configured to amplify the output signal to generate an amplified current. The device may also include a compensation unit configured to generate a compensation current on the basis of the amplified current and allow the compensation current to flow to each of the two or more high-current paths, and a malfunction detection unit configured to detect a malfunction of the amplification unit. The malfunction detection unit and at least a portion of the amplification unit may be embedded in one integrated circuit (IC) chip.

公开(公告)号：US11963541B2

公开(公告)日：2024-04-23

申请号：US16309077

申请日：2018-01-31

Applicant: Ming Yu

Inventor： Ming Yu

IPC: A23L3/32 ,  A23B4/015 ,  A23B7/015 ,  H01F27/42 ,  H05B6/48

CPC classification number: A23L3/32 ,  A23B4/015 ,  A23B7/015 ,  H01F27/42 ,  H05B6/48 ,  A23V2002/00

Abstract: Provided are a device and system for generating a low frequency alternating electric field, and a signal regulating method. The device for generating a low frequency alternating electric field includes: a direct current power supply module, an input control module, a transformer, an output control module, and a discharge module. An output end of the direct current power supply module is coupled with an input end of the input control module. An output end of the input control module is coupled with a primary side winding of the transformer, one end of a secondary side winding of the transformer is coupled with an input end of the output control module, an output end of the output control module is coupled with the discharge module, and the other end of the secondary side winding of the transformer is coupled with a ground equipotential point.

公开(公告)号：US11953576B2

公开(公告)日：2024-04-09

申请号：US17280088

申请日：2019-04-08

Applicant: GENERAC POWER SYSTEMS, INC.

Inventor： Kyle Klumper ,  Jonathan Hallam ,  Shabnam Shambayati ,  Jonathan Li ,  Colby Gore ,  Ching Kun Meng

IPC: G01R35/02 ,  H01F27/40 ,  H01F27/42

CPC classification number: G01R35/02 ,  H01F27/402 ,  H01F27/427

Abstract: A smart current transformer for determining primary current or power consumption, by stepping down the primary current to a secondary current for subsequent measurement by a connected meter. The current transformer is provided with a connected non-volatile memory for storing calibration data (and optionally identification data) regarding that particular current transformer. The calibration data can include the gain error and/or phase delay for the current transformer, as determined from prior calibration testing of the current transformer. The calibration data may be communicated to or otherwise determined by the meter, and used to calibrate the measurement of the secondary current, in order to determine the primary current or power consumption. Also disclosed is a system and method utilizing such a smart current transformer.

公开(公告)号：US11863249B2

公开(公告)日：2024-01-02

申请号：US17750915

申请日：2022-05-23

Applicant: NuCurrent, Inc.

Inventor： Michael H. Katz

IPC: H04B1/38 ,  H04L27/00 ,  H03K7/08 ,  H01F27/42 ,  G05B11/01 ,  H04B5/00 ,  H02J50/12 ,  H02J50/80 ,  H02J50/20

CPC classification number: H04B5/0037 ,  H02J50/12 ,  H02J50/20 ,  H02J50/80

Abstract: A system for wireless communications includes an antenna and a controller, the antenna configured to transmit electrical data signals, the electrical data signals including an encoded message signal. The encoded message signal including one or more encoded message words. The controller is configured to encode one or more message words, of a message signal, into one or more encoded message words of the encoded message signal, based on a coding format. The coding format correlates each of a plurality of correlated ratios with one of a plurality of format words. Each of the plurality of correlated ratios is a ratio of a duty cycle of a pulse to a respective period associated with one or both of the duty cycle and the pulse. Each of the one or more encoded message words are encoded as one of the plurality of correlated ratios.

公开(公告)号：US11763983B2

公开(公告)日：2023-09-19

申请号：US17107044

申请日：2020-11-30

Applicant: Delta Electronics (Thailand) Public Co., Ltd.

Inventor： Christian Krumpholz

IPC: H01F27/42 ,  H01F3/14 ,  H01F27/38 ,  H02M1/15

CPC classification number: H01F27/427 ,  H01F3/14 ,  H01F27/385 ,  H02M1/15

Abstract: A passive, current dependent inductivity (1) comprises a magnetic core (2), windings (3) and at least one bank air gap (4). A saturation region (5) made of magnetic material is arranged between the bank air gap (4) and the windings (3). A magnetic flux path (6) bifurcates into a first path (61) passing through the saturation region (5) and into a second path (62) passing through the bank air gap (4) and bypassing the saturation region (5). The magnetic resistance of the first path (61) is lower than the magnetic resistance of the second path (62) for winding currents below a first saturation current (7a) and whereby the magnetic resistance of the second path (62) is lower than the magnetic resistance of the first path (61) for winding currents above the first saturation current (7a) due to saturation of the saturation region.

公开(公告)号：US20230049051A1

公开(公告)日：2023-02-16

申请号：US17531796

申请日：2021-11-21

Applicant: Realtek Semiconductor Corp.

Inventor： Yang Chang ,  Chia-Yi Lee ,  Chia-Jun Chang

IPC: H01F27/42 ,  H01F27/40

Abstract: An inductor device includes a first inductor, a second inductor, and at least one switch circuit. The second inductor is arranged to enclose the first inductor, and use a topmost layer metal to resist external interference for the first inductor. The at least one switch circuit is coupled to the second inductor, and is arranged to receive at least one control voltage, wherein the at least one control voltage is arranged to adjust conduction degree of the at least one switch circuit.

公开(公告)号：US11574759B2

公开(公告)日：2023-02-07

申请号：US16528597

申请日：2019-07-31

Applicant: State Grid Jiangsu Electric Power Co., Ltd. Research Institute ,  Jiangsu Electric Power Research Institute Corporation Limited ,  State Grid Jiangsu Electric Power Co., Ltd. ,  Nanjing DNN Technology Co., LTD

Inventor： Fengbo Tao ,  Jiansheng Li ,  Chao Wei ,  Yang Liu ,  Xu Wei ,  Yuncai Lu ,  Shu Chen ,  Hairong Wei ,  Yiming Wu ,  Xiaoping Yang ,  Jieqing Deng ,  Peng Wu ,  Tianxi Xie ,  Shengquan Wang ,  Caibo Liao ,  Ruibin Li

IPC: G01R33/12 ,  H01F13/00 ,  H01F27/42

Abstract: The present invention discloses a device for evaluating and demagnetizing residual magnetism quantity of a power transformer. A main circuit comprises a switching power supply the two ends of which are respectively connected with a filter capacitor and a resistor in parallel. A forward end of the switching power supply is connected with a main switch in series. A rear end of the main switch is connected with a series branch of a sixth switch and a first resistor, a series branch of a first switch and a second switch, and a series branch of a third switch and a fourth switch are connected in parallel. A driving circuit is respectively connected with driving ends of the main switch, the sixth, first, second, third and fourth switches. A control circuit is connected with the driving circuit for sending an instruction to the driving circuit.

公开(公告)号：US11552604B2

公开(公告)日：2023-01-10

申请号：US17011442

申请日：2020-09-03

Applicant: SPREADTRUM COMMUNICATIONS (SHANGHAI) CO., LTD.

Inventor： Xuanhe Liu

IPC: H03F3/45 ,  H01F27/29 ,  H01F27/42

Abstract: Balun device and differential phase shifter are provided. The balun device includes a first primary coil, a first secondary coil, a second primary coil and a second secondary coil, the first primary coil having a first terminal receiving a first differential signal, and a second terminal outputting a first in-phase component, the first secondary coil having a first terminal outputting a first component orthogonal to the first in-phase component, and a second terminal coupled to AC ground, the second primary coil having a first terminal receiving a second differential signal, and a second terminal outputting a second in-phase component; the second secondary coil having a first terminal outputting a second component orthogonal to the second in-phase component, and a second terminal coupled to AC ground; phase differences between the first and second differential signals, between the first and second in-phase components, between the first and second orthogonal component are 180°.

公开(公告)号：US11532425B2

公开(公告)日：2022-12-20

申请号：US16734776

申请日：2020-01-06

Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.

Inventor： Tzu-Sung Huang ,  Chen-Hua Yu ,  Hao-Yi Tsai ,  Hung-Yi Kuo ,  Ming Hung Tseng

IPC: H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H01F27/28 ,  H02J50/80 ,  H02J50/10 ,  H01F38/14 ,  H01F41/04 ,  H01F41/10 ,  H01L49/02 ,  H01F17/00

Abstract: Coil structures and methods of forming are provided. The coil structure includes a substrate. A plurality of coils is disposed over the substrate, each coil comprising a conductive element that forms a continuous spiral having a hexagonal shape in a plan view of the coil structure. The plurality of coils is arranged in a honeycomb pattern, and each conductive element is electrically connected to an external electrical circuit.