公开(公告)号：US09252678B2

公开(公告)日：2016-02-02

申请号：US14613700

申请日：2015-02-04

Applicant: DENSO CORPORATION

Inventor： Tsuyoshi Hosoda ,  Akihiro Yamaguchi ,  Syuji Kurauchi

IPC: H02M7/493 ,  H02M3/337 ,  H02M3/28 ,  H02M1/00

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：US09602007B2

公开(公告)日：2017-03-21

申请号：US14615627

申请日：2015-02-06

Applicant: DENSO CORPORATION

Inventor： Tsuyoshi Hosoda

IPC: H02J7/00 ,  H02M3/335 ,  H02M3/28 ,  H02M1/32

CPC classification number: H02M3/33507 ,  H02M1/32 ,  H02M3/285 ,  H02M3/33569 ,  H02M3/33592 ,  Y02B70/1475

Abstract: A power conversion apparatus includes a first DC/DC converter which includes a first transformer, a first primary circuit provided at a primary side of the first transformer, and a first secondary circuit provided at a secondary side of the first transformer. The first secondary circuit includes sets of a switching element and a free-wheel diode, which is connected between an input terminal and an output terminal of the switching element, to perform synchronous rectification operation and diode rectification operation. The apparatus includes a second DC/DC converter which includes a second transformer, a second primary circuit provided at a primary side of the second transformer, and a second secondary circuit provided at a secondary side of the second transformer. The second secondary circuit includes a plurality of rectifier diodes, which are arranged in parallel with each other, to perform the diode rectification operation constantly.

公开(公告)号：US09537402B2

公开(公告)日：2017-01-03

申请号：US14710881

申请日：2015-05-13

Applicant: DENSO CORPORATION

Inventor： Syuji Kurauchi ,  Tsuyoshi Hosoda ,  Keisuke Yagyu

IPC: H02J1/10 ,  H02M3/28 ,  H02M3/335 ,  H02J7/00

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。 当检测到的输出电压Vo2的每个预定时间的变化ΔV低于变化ΔVth1时，控制单元选择从主转换器接收的电流指令值Ic2作为目标指令值。 控制单元选择计算出的电压指令值Vc2a，以便当变化ΔV超过变化ΔVth1时将输出电压Vo2抑制为目标指令值。