公开(公告)号：US20240213885A1

公开(公告)日：2024-06-27

申请号：US18598821

申请日：2024-03-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Eduardo FACANHA DE OLIVEIRA

IPC: H02M5/458 ,  H02M1/42 ,  H02M1/44

CPC classification number: H02M5/4585 ,  H02M1/4283 ,  H02M1/44

Abstract: The disclosure relates to an AC-DC conversion device for converting an alternating current (AC) voltage into a direct current (DC) voltage, the AC-DC conversion device including an AC input terminal for receiving an AC voltage and an AC-DC conversion stage being configured top convert the AC voltage into a first DC voltage, convert the AC voltage into a second DC voltage, and output the second DC voltage at an output of the AC-DC conversion device. The AC-DC conversion device further includes a partial power DC-DC converter configured to regulate the second DC voltage based on a required voltage across the output of the AC-DC conversion device. The disclosure further relates to a voltage converter circuit comprising such an AC-DC conversion device and an output for providing an isolated output voltage.

公开(公告)号：US20230208311A1

公开(公告)日：2023-06-29

申请号：US18116021

申请日：2023-03-01

Applicant: Yamaha Corporation

Inventor： Masao NORO ,  Yoshiro MIYAKE

IPC: H02M7/04 ,  H02M7/12 ,  H02M1/00 ,  H02M1/42

CPC classification number: H02M7/043 ,  H02M7/12 ,  H02M1/0025 ,  H02M1/4283

Abstract: In a switching power supply, a rectifying circuit outputs a first voltage. A switching circuit switches the first voltage into a switching voltage. An output circuit generates a second voltage based on the switching voltage. A feedback circuit generates the feedback signal based on the first and second voltages, and includes a carrier wave generation circuit that generates a carrier wave. The carrier wave has a non-linear shape at its rising edge and/or falling edge. A PWM circuit generates a PWM signal based on a comparison between the first voltage and a voltage of the carrier wave. Due to the non-linear shape, as the first voltage is higher, a pulse width of the PWM signal is changeable more greatly based on a change in the first voltage. A low-pass filter generates the feedback signal based on the PWM signal.

公开(公告)号：US20240162810A1

公开(公告)日：2024-05-16

申请号：US18282916

申请日：2022-03-03

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Sadanori SUZUKI

IPC: H02M1/42 ,  H02M1/15 ,  H02M1/44 ,  H02M7/217 ,  H02M7/25

CPC classification number: H02M1/4283 ,  H02M1/15 ,  H02M1/44 ,  H02M7/2176 ,  H02M7/25

Abstract: A power conversion device converts AC voltage into DC voltage. The power conversion device includes a transformer, a first capacitor, a primary circuit, a rectifying-smoothing circuit, and a controller. The primary circuit includes a bridge circuit having two arm switching elements, and is connected to a primary winding of the transformer via the first capacitor. The rectifying-smoothing circuit includes a secondary diode and an output capacitor. The primary circuit includes a buffer circuit having a buffer capacitor and a buffer switching element. The controller controls switching of switching elements.

公开(公告)号：US20240063708A1

公开(公告)日：2024-02-22

申请号：US18259340

申请日：2021-02-12

Applicant: Mitsubishi Electric Corporation

Inventor： Koichi ARISAWA ,  Takuya SHIMOMUGI ,  Takaaki TAKAHARA ,  Haruka MATSUO ,  Keisuke UEMURA

IPC: H02M1/12 ,  H02M1/42 ,  H02M1/00 ,  H02M1/16 ,  H02M5/458 ,  H02P27/12 ,  H02M1/14 ,  F25B49/02

CPC classification number: H02M1/12 ,  H02M1/4283 ,  H02M1/0009 ,  H02M1/16 ,  H02M1/4225 ,  H02M5/4585 ,  H02P27/12 ,  H02M1/143 ,  F25B49/025 ,  H02P2201/07 ,  H02P2201/09 ,  H02P2201/15 ,  F25B2600/021

Abstract: A power converter includes: a rectifying and boosting unit that rectifies first alternating-current power supplied from a commercial power supply and boosts a voltage of the first alternating-current power; a capacitor connected to an output end of the rectifying and boosting unit; an inverter to convert power output from the rectifying and boosting unit and the capacitor into second alternating-current power, and output the second alternating-current power to a device; and a control unit that reduces a current flowing through the capacitor by controlling the rectifying and boosting unit and by controlling the inverter such that the inverter outputs, to the device, the second alternating-current power containing a ripple dependent on a ripple of power flowing from the rectifying and boosting unit into the capacitor. The control unit controls in accordance with a load state.