公开(公告)号：US12132395B2

公开(公告)日：2024-10-29

申请号：US17685456

申请日：2022-03-03

Applicant: DENSO CORPORATION

Inventor： Kousuke Kondou ,  Yasuaki Aoki

IPC: H02P6/15 ,  H02M1/14 ,  H02M3/07 ,  H02M3/158 ,  H02P11/04 ,  H02P21/04

CPC classification number: H02M1/143 ,  H02M3/07 ,  H02M3/158 ,  H02P11/04

Abstract: A rotating electrical machine control device is applied to a system including a power conversion circuit electrically connected to a rotating electrical machine, and a capacitor electrically connected to an input side of the power conversion circuit. The rotating electrical machine control device includes a determination unit that determines a switching mode of the power conversion circuit in which a ripple current flowing through the capacitor is reflected, based on an operating area of the rotating electrical machine, and an operation unit that operates the power conversion circuit such that the switching mode of the power conversion circuit is the switching mode determined by the determination unit.

公开(公告)号：US12105548B2

公开(公告)日：2024-10-01

申请号：US17732755

申请日：2022-04-29

Applicant: Texas Instruments Incorporated

Inventor： Saurabh Rai ,  Ramakrishna Ankamreddi

IPC: G05F1/575 ,  G05F3/26 ,  H02M1/00 ,  H02M1/14 ,  H02M3/156

CPC classification number: G05F1/575 ,  G05F3/26 ,  H02M1/0045 ,  H02M1/143 ,  H02M3/156

Abstract: Described embodiments include a circuit for reducing output voltage noise in a voltage regulator includes an amplifier having first and second amplifier inputs, a compensation terminal and an amplifier output. The first amplifier input is coupled to a reference voltage terminal, and the compensation terminal coupled to an output terminal. A buffer amplifier has a buffer input and a buffer output, and the buffer input is coupled to the amplifier output. A first transistor is coupled between a supply voltage terminal and the output terminal, and has a first control terminal that is coupled to the buffer output. A boost current injection circuit has a boost input and a boost output, and the boost input is coupled to the supply voltage terminal. A second transistor is coupled between the boost output and the compensation terminal, and has a second control terminal.

公开(公告)号：US20240297584A1

公开(公告)日：2024-09-05

申请号：US18117344

申请日：2023-03-03

Applicant: Avago Technologies International Sales Pte. Limited

Inventor： Shengyuan LI ,  Jianlong CHEN ,  Xicheng JIANG

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/14

CPC classification number: H02M3/1582 ,  H02M1/0045 ,  H02M1/143

Abstract: A circuit includes a boost circuit, a first circuit coupled to the boost circuit and a second circuit coupled to the boost circuit. The boost circuit, the first circuit, and the second circuit form an open loop. The first circuit and the second circuit maintain a switching frequency of the boost circuit above a threshold frequency.

公开(公告)号：US20240266945A1

公开(公告)日：2024-08-08

申请号：US18616220

申请日：2024-03-26

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Yansi YANG ,  Haike WANG ,  Hongtao WANG ,  Xiaohua QIN ,  Fengjie SUN ,  Ruijian WEN

IPC: H02M1/12 ,  A61B8/00 ,  H02M1/14 ,  H02M3/158

CPC classification number: H02M1/126 ,  A61B8/56 ,  H02M1/143 ,  H02M3/158

Abstract: An apparatus for supplying power is disclosed. The apparatus may comprise a power supply circuit and a processing unit, wherein the power supply circuit may be connected with an electric energy input end of the processing unit, and the power supply circuit may provide a first power supply for the processing unit; and a forward voltage output end of the processing unit may provide a forward power supply, and a backward voltage output end of the processing end may provide a negative power supply, wherein the processing unit may include a resonant circuit, a first switching frequency of the processing unit may include a resonant frequency of the resonant circuit, and the resonant frequency may be outside an effective frequency range of a load of the apparatus for supplying power.

公开(公告)号：US20240223070A1

公开(公告)日：2024-07-04

申请号：US18289023

申请日：2021-05-11

Applicant: Fanuc Corporation

Inventor： Yuya Nakagawa

IPC: H02M1/14 ,  G01R31/30 ,  H02M7/5387

CPC classification number: H02M1/143 ,  G01R31/3004 ,  H02M7/53871

Abstract: A capacitor deterioration detection device that detects deterioration of a filter capacitor which is provided in a filter connected to the AC side of a converter includes: a current measurement unit that measures current which flows in the filter capacitor; a calculation unit that uses the measurement value of the current which has been measured by the current measurement unit to calculate a parameter for determination of deterioration, and a determination unit that determines, on the basis of the result of a comparison between a reference value and the parameter for determination of deterioration which has been calculated by the calculation unit, whether or not the filter capacitor has deteriorated.

公开(公告)号：US11973351B2

公开(公告)日：2024-04-30

申请号：US17754539

申请日：2019-12-12

Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION

Inventor： Tomoya Katsukura ,  Yoshihiro Tawada

IPC: H02J3/38 ,  H02J3/16 ,  H02J3/46 ,  H02M1/00 ,  H02M1/14

CPC classification number: H02J3/381 ,  H02J3/16 ,  H02J3/46 ,  H02M1/0009 ,  H02M1/143 ,  H02J2300/24

Abstract: A power converter includes a power conversion circuit including a direct-current terminal connected to a solar cell panel, and an alternating-current terminal connected to an alternating-current power system, the power conversion circuit being configured to convert direct-current power generated by the solar cell panel into alternating-current power and to supply the alternating-current power to the alternating-current power system; a current detection unit configured to detect a direct current flowing between the solar cell panel and the power converter; and a control circuit including a power generation mode in which the control circuit controls the power conversion circuit to output active power generated from the direct-current power generated by the solar cell panel to the alternating-current power system, and a reactive power compensation mode in which the control circuit controls the power conversion circuit to output reactive power to the alternating-current power system.

公开(公告)号：US20240120839A1

公开(公告)日：2024-04-11

申请号：US18220042

申请日：2023-07-10

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jeonggyu PARK ,  Jongyoung LEE ,  Seungwoo JWA

IPC: H02M3/158 ,  H02M1/08 ,  H02M1/14

CPC classification number: H02M3/1582 ,  H02M1/08 ,  H02M1/143

Abstract: A converter of a wireless communication system includes a first circuit configured to perform a buck operation, a second circuit configured to perform a boost operation, an inductor coupling the first circuit and the second circuit, and a third circuit including a first resistor and a first diode. The first circuit includes a first field effect transistor (FET), a second FET, a first capacitor, and a first drive circuit. The second circuit includes a third FET, a fourth FET, a second capacitor, a first Zener diode, and a second drive circuit, and the first Zener diode. The third circuit is coupled to a first node to which the first drive circuit and the first capacitor are coupled and is coupled to a second node to which the second drive circuit, the second capacitor, and the first Zener diode are coupled.

公开(公告)号：US20240006997A1

公开(公告)日：2024-01-04

申请号：US18038188

申请日：2021-11-15

Applicant: Dyson Technology Limited

Inventor： Stephen GREETHAM

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/14

CPC classification number: H02M3/1582 ,  H02M1/0009 ,  H02M1/143

Abstract: A buck-boost converter is described that includes input terminals, output terminals, a first group of devices, a second group of devices, an inductor, a capacitor, and a controller. Each group of devices includes a first switch, a second switch, and a third switch or diode connected in series. Each group of devices further includes a first node located between the first switch and the second switch, and a second node located between the second switch and the third switch or diode. A first of the input terminals is connected to the first node of the first group of devices, and a second of the input terminals is connected to the first node of the second group of devices. The inductor is connected between the second node of the first group of devices and the second node of the second group of devices. The first group of devices, the second group of devices, and the capacitor are connected in parallel across the output terminals, and the controller controls the switches of the first group of devices and the second group of devices.

公开(公告)号：US11848601B1

公开(公告)日：2023-12-19

申请号：US17828159

申请日：2022-05-31

Applicant: Renesas Design (UK) Limited

Inventor： Yu-Chin Lin

IPC: H02M1/14 ,  H02M1/42 ,  H05B45/36 ,  H05B45/355 ,  H05B45/3725

CPC classification number: H02M1/143 ,  H02M1/4258 ,  H05B45/355 ,  H05B45/36 ,  H05B45/3725

Abstract: A ripple reduction circuit for use with an AC/DC power supply providing an output voltage to a load is presented. The ripple reduction circuit includes an input terminal for receiving the output voltage and a low pass filter. The low pass filter is used to filter an AC component of the output voltage to obtain a filtered DC voltage. The ripple reduction circuit generates a reference current based on the filtered DC voltage and a control voltage having an AC component in phase with the AC component of the output voltage.

公开(公告)号：US11831263B2

公开(公告)日：2023-11-28

申请号：US17295217

申请日：2019-01-07

Applicant: LG ELECTRONICS INC.

Inventor： Jungdae Lee ,  Sanggi Ko ,  Jaeyoon Oh ,  Gilsu Lee

IPC: H02P27/06 ,  H02M1/14 ,  H02P101/45

CPC classification number: H02P27/06 ,  H02M1/143 ,  H02P2101/45

Abstract: The present specification relates to a motor control device, a motor control system, and a motor control method. The motor control device measures a ripple voltage of a DC link capacitor to determine an appropriate switching frequency according to the ripple voltage, and causes a plurality of arithmetic processing units to selectively control a switching operation of the switching unit according to the determined switching frequency.