公开(公告)号：US20220271684A1

公开(公告)日：2022-08-25

申请号：US17709806

申请日：2022-03-31

Applicant: DENSO CORPORATION

Inventor： Seiji IYASU ,  Syuji KURAUCHI ,  Yuuichi HANDA

IPC: H02M7/219 ,  H02M1/00

Abstract: A power converter includes a full-bridge circuit, power converting circuit, transformer, and controller. The full-bridge circuit includes a series-connected unit made of first and second switches and a series-connected unit made of third and fourth switches and is connected to power transmitting terminals. The power converting circuit is connected to power receiving terminals. The transformer includes power transmitting coil and power receiving coil. The power transmitting coil is connected to full-bridge circuit. The power receiving coil is connected to power converting circuit. The controller turns on the first and second switches alternately and also the third and fourth switches alternately. A resistive load is connected to the power receiving terminals. The controller serves to determine a phase difference between the time when first switch is turned on and the time when third switch is turned on to decrease with a decrease in measured voltage developed at the power receiving terminals.

公开(公告)号：US20220263411A1

公开(公告)日：2022-08-18

申请号：US17734761

申请日：2022-05-02

Applicant: DENSO CORPORATION

Inventor： Naoto KOBAYASHI ,  Syuji KURAUCHI ,  Yuuichi HANDA

IPC: H02M3/155 ,  H02M7/00

Abstract: An electric power conversion apparatus has an input and output terminal, and a switch unit, and turns on and off the switch unit to transfer electric power from an electric storage unit connected to the input terminal to a power supply target connected to the output terminal. When reverse conduction current flows in the switch unit, it causes a larger conduction loss in an off state than an on state. The apparatus includes: a control unit that determines whether there is a request for increasing an amount of heat generation due to the electric power transfer, and when it is determined that there is the request, turns off the switch unit in which the reverse conduction current flows during the electric power transfer and, when it is determined that there is no request, turns on the switch unit in which the reverse conduction current flows during the electric power transfer.

公开(公告)号：US20220131401A1

公开(公告)日：2022-04-28

申请号：US17570057

申请日：2022-01-06

Applicant: DENSO CORPORATION

Inventor： Naoto KOBAYASHI ,  Syuji KURAUCHI ,  Yuuichi HANDA

IPC: H02J7/00 ,  B60L58/25 ,  B60L53/60 ,  H02M3/335 ,  H01M10/633 ,  H01M10/625 ,  H01M10/6571 ,  H01M10/6567

Abstract: A power supply system includes a power conversion circuit that is connectable to a power storage unit. The power supply system includes a control unit and a heat transferring unit. The control unit supplies a current between the power storage unit and the power conversion circuit by performing on-off control of a switch that configures the power conversion circuit. The heat transferring unit absorbs heat that is generated in the power conversion circuit in accompaniment with the on-off control of the switch and transfers the heat to a temperature-increase target element. The control unit performs temperature-increase mode control in which the switch is on-off controlled such that an amount of heat that is generated in the power conversion circuit is increased when a temperature-increase request for the temperature-increase target element is present, compared to when the temperature-increase request is not present.

公开(公告)号：US20150333636A1

公开(公告)日：2015-11-19

申请号：US14710881

申请日：2015-05-13

Applicant: DENSO CORPORATION

Inventor： Syuji KURAUCHI ,  Tsuyoshi HOSODA ,  Keisuke YAGYU

IPC: H02M3/335

CPC classification number: H02M3/285 ,  H02J1/102 ,  H02J7/0065 ,  H02M3/33507

Abstract: An electric power converter is equipped with a master converter and a slave converter that are connected in parallel with each other, and to a load. The master converter operates having priority over the slave converter. The slave converter includes a voltage sensor for detecting an output voltage of the electric power converter and a control unit for controlling an output of the slave converter based on a target command value. The control unit selects a current command value Ic2 received from the master converter as a target command value when a variation ΔV per predetermined time of a detected output voltage Vo2 is lower than a variation ΔVth1. The control unit selects a voltage command value Vc2a calculated so as to suppress the output voltage Vo2 from changing as the target command value when the variation ΔV exceeds the variation ΔVth1.

Abstract translation: 电力转换器配备有彼此并联连接的负载和主转换器。 主转换器优先于从属转换器工作。 从属转换器包括用于检测电力转换器的输出电压的电压传感器和用于基于目标指令值控制从属转换器的输出的控制单元。 Vth1，当检测到的输出电压Vo2的每个预定时间的变化量＆Dgr; V变得低于变化量Dgr; Vth1时，控制单元选择从主变换器接收的电流指令值Ic2作为目标指令值。 在变化＆Dgr; V超过变化＆Dgr; Vth1时，控制单元选择计算出的电压指令值Vc2a，以便抑制输出电压Vo2作为目标指令值而改变。

公开(公告)号：US20220263426A1

公开(公告)日：2022-08-18

申请号：US17735453

申请日：2022-05-03

Applicant: DENSO CORPORATION

Inventor： Katsuhiro ICHIHASHI ,  Syuji KURAUCHI

IPC: H02M7/00 ,  H02M1/00 ,  H05K7/14

Abstract: A power converter includes a plurality of ports provided to a housing, a plurality of conversion circuit electrically connected to the respective ports, and a plurality of coils electrically connected to the respective power conversion circuits and wound around a transformer core. The plurality of coils including a predetermined first coil electrically connected to a predetermined conversion circuit and a second coil. The conversion circuit is mounted to a predetermined board, while the first coil is fixed along the periphery of a board hole of the predetermined board. The predetermined board is fixed to the housing in the state in which the transformer core is inserted into the board hole to determine the position of the predetermined coil relative to the second coil.

公开(公告)号：US20220255445A1

公开(公告)日：2022-08-11

申请号：US17730417

申请日：2022-04-27

Applicant: DENSO CORPORATION

Inventor： Naoto KOBAYASHI ,  Syuji KURAUCHI ,  Yuuichi HANDA

IPC: H02M3/335 ,  H02M1/32 ,  H02M3/158

Abstract: A power conversion apparatus includes an input side terminal, an output side terminal and a switch unit, switching the switch unit between ON and OFF during a power transmission. The switch unit has characteristics that, in the case where a reverse current flows through the switch unit, the larger a gate voltage thereof in a negative side, the larger a conduction loss occurring when the reverse current flows. The power conversion apparatus is provided with a control unit that increases, when determined that the increase request for increasing the heating value is present, the gate voltage of the switch unit to the negative side when turned OFF compared to a case where no increase request for increasing the heating value is present, the reverse current flowing through the switch unit during the power transmission.

公开(公告)号：US20150222191A1

公开(公告)日：2015-08-06

申请号：US14613700

申请日：2015-02-04

Applicant: DENSO CORPORATION

Inventor： Tsuyoshi HOSODA ,  Akihiro YAMAGUCHI ,  Syuji KURAUCHI

IPC: H02M3/335

CPC classification number: H02M3/3376 ,  H02M3/285 ,  H02M2001/0032 ,  H02M2001/0048 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A power conversion apparatus is provided which includes a first DC/DC converter and a second DC/DC converter which are connected to each other in parallel, and a controller which changes a state of the second DC/DC converter between operation and stop, based on an input current or an output current of the power conversion apparatus, and at least one current threshold determined based on a first characteristic curve showing a relation between current and conversion efficiency in a state where the second DC/DC converter is stopped while the first DC/DC converter is operated and a second characteristic curve showing a relation between current and conversion efficiency in a state where the first DC/DC converter and the second DC/DC converter are operated.

Abstract translation: 提供了一种电力转换装置，其包括彼此并联连接的第一DC / DC转换器和第二DC / DC转换器，以及基于操作和停止之间改变第二DC / DC转换器的状态的控制器 在电力转换装置的输入电流或输出电流上，以及至少一个电流阈值，其基于表示第二DC / DC转换器停止的状态下的电流和转换效率之间的关系的第一特性曲线确定，而第一 在第一DC / DC转换器和第二DC / DC转换器工作的状态下，操作DC / DC转换器和表示电流与转换效率之间的关系的第二特性曲线。

公开(公告)号：US20150029759A1

公开(公告)日：2015-01-29

申请号：US14339859

申请日：2014-07-24

Applicant: DENSO CORPORATION

Inventor： Yuuki TAKEMOTO ,  Katsutoyo MISAWA ,  Yuuichi HANDA ,  Syotarou YAMASAKI ,  Syuji KURAUCHI ,  Kenta HATAKENAKA

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  B60L11/00 ,  B60L15/007 ,  B60L2210/10 ,  H01F5/00 ,  H02M3/00 ,  H02M3/337 ,  H05K1/0263 ,  H05K1/18 ,  H05K2201/1003 ,  H05K2201/10166 ,  H05K2201/10174 ,  H05K2201/10515 ,  Y02T10/645 ,  Y02T10/7216

Abstract: An electric power source device has a transformer, a primary-side semiconductor module, a secondary-side semiconductor module, a secondary-side electrical component, a base plate and a circuit substrate on which substrate-side electrical components are mounted. The primary-side semiconductor module has a larger exterior size than the secondary-side electrical component. The primary-side semiconductor module and the secondary-side electrical component form a stacked section. In the stacked section, the secondary-side electrical component is stacked, in a vertical direction, i.e. a direction of a normal line of a mounting surface of the base plate, on the primary-side semiconductor module. The primary-side semiconductor module is directly mounted on the mounting surface. At least a part of the substrate-side electrical components is arranged inside of the primary-side semiconductor module in a horizontal direction, and inside of a second surface of the stacked section toward the mounting surface along the normal line.

Abstract translation: 电源装置具有安装有基板侧电气部件的变压器，初级侧半导体模块，二次侧半导体模块，二次侧电气部件，基板以及电路基板。 初级侧半导体模块具有比次级侧电气部件更大的外部尺寸。 初级侧半导体模块和次级侧电气部件形成堆叠部。 在堆叠部分中，次级侧电气元件在初级侧半导体模块上沿垂直方向，即基板的安装表面的法线方向堆叠。 初级侧半导体模块直接安装在安装面上。 基板侧电气部件的至少一部分在水平方向配置在一次侧半导体模块的内部，在堆叠部的第二面的内侧沿着法线配置在安装面上。