公开(公告)号：US20240162834A1

公开(公告)日：2024-05-16

申请号：US18372615

申请日：2023-09-25

Applicant: Delta Electronics (Shanghai) Co., Ltd.

Inventor： Yichao Wang ,  Yuhua Hu ,  Kai Dong ,  Jinfa Zhang

IPC: H02M7/219 ,  H02M3/335 ,  H02M7/04

CPC classification number: H02M7/2195 ,  H02M3/33507 ,  H02M7/05

Abstract: A multi-level conversion circuit and a control method for flying capacitor voltage thereof are provided. In the multi-level conversion circuit, each flying capacitor is connected between a common connection node of the lower switches connected therewith and a common connection node of the upper switches connected therewith. The control method includes steps of: (a) determining the main switch and synchronous rectification switch of the lower and upper switches; (b) acquiring an adjustment value corresponding to each flying capacitor; (c) adjusting a duty ratio of the main switch according to the adjustment value corresponding to the flying capacitor connected therewith; and (d) when the multi-level conversion circuit working in a CCM, increasing a phase-shift angle between the main switches by an angle to make a peak value or a valley value of an inductor current remain unchanged before and after adjusting the duty ratio.

公开(公告)号：US20240136939A1

公开(公告)日：2024-04-25

申请号：US18489268

申请日：2023-10-17

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yuchen ZHOU

IPC: H02M7/217 ,  H02M1/42 ,  H02M7/04 ,  H02M7/219

CPC classification number: H02M7/2173 ,  H02M1/4233 ,  H02M1/4266 ,  H02M7/05 ,  H02M7/219 ,  B60L53/53

Abstract: A charging module and a charging device. The charging module includes a three-phase rectifier module, a bus capacitor module, an inductor, and a controller. An input end of the three-phase rectifier module is electrically connected to an input power supply, and an output end of the three-phase rectifier module is electrically connected to an input end of the bus capacitor module. The bus capacitor module includes a first bus capacitor and a second bus capacitor. The first bus capacitor is connected between a first output end of a three-phase bridge arm and a midpoint of the three-phase bridge arm, and the second bus capacitor is electrically connected between a second output end of the three-phase bridge arm and the midpoint. The inductor is electrically connected to the midpoint of the three-phase bridge arm and a midpoint between the first bus capacitor and the second bus capacitor.

公开(公告)号：US20240106340A1

公开(公告)日：2024-03-28

申请号：US18370185

申请日：2023-09-19

Applicant: AA Power Inc.

Inventor： Qun Lu

IPC: H02M7/00 ,  H02M1/00 ,  H02M7/04 ,  H02M7/217

CPC classification number: H02M7/003 ,  H02M1/007 ,  H02M7/05 ,  H02M7/2173

Abstract: An apparatus includes, on a top layer of a circuit board, a first and a second synchronous rectifier groups (SRGs) placed along first two opposite sides of a first phase of a transformer including three phases. A second and a fourth SRGs are placed along the first two opposite sides on a bottom layer of the circuit board. The first and second SRGs are connected between a first terminal of the first phase and a grounding terminal. The third and fourth SRGs are connected between a second terminal of the first phase and the grounding terminal. Two filter capacitor groups are placed along second two opposite sides of the first phase on the top layer. Another two filter capacitor groups are placed along the second two opposite sides on the bottom layer. The four filter capacitor groups are connected to a third terminal of the first phase.

公开(公告)号：US20240006984A1

公开(公告)日：2024-01-04

申请号：US18254785

申请日：2021-01-06

Applicant: Mitsubishi Electric Corporation

Inventor： Haruka MATSUO ,  Takaaki TAKAHARA ,  Koichi ARISAWA ,  Keisuke UEMURA ,  Kenji TAKAHASHI

IPC: H02M1/14 ,  H02M7/04 ,  H02M7/219

CPC classification number: H02M1/14 ,  H02M7/05 ,  H02M7/219

Abstract: A power converter includes a converter, a smoothing capacitor, an inverter, and a controller. The converter rectifies a power supply voltage applied from an alternating-current power supply. The smoothing capacitor smooths a rectified voltage output from the converter into a direct-current voltage including a ripple. The inverter converts the direct-current voltage smoothed by the smoothing capacitor into an alternating-current voltage to be applied to a motor. The controller performs control such that a first physical quantity representing an operation state of the converter is equal to a second physical quantity representing an operation state of the inverter.

公开(公告)号：US11843312B2

公开(公告)日：2023-12-12

申请号：US17552233

申请日：2021-12-15

Applicant: The Board of Trustees of the Leland Stanford Junior University

Inventor： Juan M. Rivas-Davila ,  Lei Gu ,  Luke C. Raymond ,  Sanghyeon Park

IPC: H02M3/335 ,  H02M1/00 ,  H02M3/00 ,  H02M7/04 ,  H02M7/10

CPC classification number: H02M1/0077 ,  H02M1/00 ,  H02M1/0095 ,  H02M3/01 ,  H02M3/33523 ,  H02M3/33573 ,  H02M3/33592 ,  H02M7/05 ,  H02M7/10 ,  H02M3/003

Abstract: An apparatus including direct-current (DC)-alternating-current (AC) inverter circuitry, first and second circuits, and output circuitry. The DC-AC inverter circuitry inverts a DC input signal corresponding to an input voltage to an AC signal. The first circuit and second circuits respectively include inductive isolation circuits driven in response to power from the at least one AC signal, and rectifier circuits that responds to the inductive isolation circuits by outputting first and second rectified signals, where at least one of the first and second rectifier circuits characterized as being limited by a voltage breakdown rating. The output circuitry provides a DC output voltage signal and to cascade a plurality of signals, including the first and second rectified signals, to provide a voltage source that is dependent on the first and second rectified signals and greater than voltage breakdown rating.

公开(公告)号：US20230352942A1

公开(公告)日：2023-11-02

申请号：US17918804

申请日：2020-05-21

Applicant: Mitsubishi Electric Corporation

Inventor： Fuminori NAKAMURA ,  Ryota ONISHI ,  Michihiro TADOKORO

IPC: H02J3/36 ,  H02H7/12 ,  H02M7/04

CPC classification number: H02J3/36 ,  H02H7/12 ,  H02M7/05

Abstract: A power conversion system including: a self-excited power converter that converts power between an alternating-current (AC) power system and a direct-current (DC) line; an AC circuit breaker disposed between the AC power system and the self-excited power converter; an arrester connected between the DC line and a ground or between an AC line and the ground, the AC line connecting the AC circuit breaker and the self-excited power converter; and a control device. The control device causes the self-excited power converter to stop a switching operation when the control device detects a ground fault accident on the DC line, and opens the AC circuit breaker after the self-excited power converter stops the switching operation.

公开(公告)号：US11757344B2

公开(公告)日：2023-09-12

申请号：US17703304

申请日：2022-03-24

Applicant: Delta Electronics, Inc.

Inventor： Chien-Jen Chen ,  Chao-Shun Yang ,  Cheng-Hsun Chang

IPC: H02M3/158 ,  H02M1/00 ,  H02M7/04

CPC classification number: H02M1/0006 ,  H02M1/007 ,  H02M3/158 ,  H02M7/05 ,  H02M1/009

Abstract: The present disclosure provides a conversion circuit including a power supply module, positive and negative input terminals, positive and negative output terminals, a switch, an inductor, input and output capacitors, and a controller. The power supply module converts an AC power for providing three potentials on three power supply terminals respectively. The potential on the first power supply terminal is higher than the potential on the second power supply terminal, which is higher than the potential on the third power supply terminal. The positive and negative input terminals are electrically connected to the first and third power supply terminals respectively, and a voltage therebetween is an input voltage. The negative output terminal is electrically connected to the third power supply terminal. The controller is electrically connected to the positive input terminal, the second power supply terminal and the switch. A voltage across the controller is lower than the input voltage.

公开(公告)号：US20230283193A1

公开(公告)日：2023-09-07

申请号：US18116015

申请日：2023-03-01

Applicant: WHIRLPOOL CORPORATION

Inventor： Salvatore Baldo ,  Andrea Gallivanoni ,  Cristiano Vito Pastore ,  Andrea Zoppi

IPC: H02M7/04 ,  H02M7/219 ,  H02M1/00 ,  H05B6/12

CPC classification number: H02M7/05 ,  H02M7/219 ,  H02M1/0058 ,  H05B6/1236

Abstract: A switching converter, such as for an induction cooktop, that can be operated to deliver a power level smaller than the minimum power level for having a soft-switching. Input AC terminals are disconnected from the DC-bus capacitor to prevent it from being charged, so that the DC voltage exhibited by the DC-bus is null or smaller than a minimum nominal value when a next ON time interval T1 begins. The switching converter helps prevent ticking noise.

公开(公告)号：US11705826B2

公开(公告)日：2023-07-18

申请号：US17487655

申请日：2021-09-28

Applicant: Tyler D. Smith ,  John Patterson ,  Clinton W. Ewell

Inventor： Tyler D. Smith ,  John Patterson ,  Clinton W. Ewell

IPC: H02M7/04 ,  H02M7/219

CPC classification number: H02M7/05 ,  H02M7/219

Abstract: Systems and methods for a capacitive coupler for high-voltage step-down include an actively-controlled current-steering circuit connected in series with a current-limiting capacitor in order to transform a higher and potentially variable AC voltage to a lower regulated DC voltage. The actively-controlled current-steering circuit includes a switching element which, during operation, is predominantly either fully open or fully closed, and comparatively spends only a small fraction of operating time in a transition-state between the open and closed positions.