公开(公告)号：US20180048240A1

公开(公告)日：2018-02-15

申请号：US15666951

申请日：2017-08-02

Applicant: TDK Corporation

Inventor： Ryosuke HAYASAKI ,  Toshiki MURAYAMA ,  Ichiro TAKAYAMA ,  Kazuki IWAYA

IPC: H02M3/335 ,  H02M3/337

CPC classification number: H02M3/33584 ,  H02J2007/0059 ,  H02M3/33507 ,  H02M3/3376 ,  H02M2001/0003 ,  H02M2001/0032

Abstract: A switching power supply apparatus is provided which reduces the time of application of an input voltage to a choke to suppress a peak current flowing through switch elements when a primary or secondary voltage is 0 V (or a voltage near 0 V). A DAB converter or switching power supply apparatus performs phase control to change at least either a first conduction width or a second conduction width of pairs of diagonally-arranged switch elements, constituting a primary full bridge circuit. The first conduction width is a time width in which a pulse for driving the first switch element and a pulse for driving the fourth switch element overlap temporally. The second conduction width is a time width in which a pulse for driving the second switch element and a pulse for driving the third switch element overlap temporally.

公开(公告)号：US20210367521A1

公开(公告)日：2021-11-25

申请号：US17326157

申请日：2021-05-20

Applicant: TDK CORPORATION

Inventor： Tetsuya SAKAI ,  Taichi IURA ,  Hiroshige YANAGI ,  Kazuki IWAYA

IPC: H02M3/335

Abstract: A DAB converter that is capable of inhibiting a decrease in the transmission efficiency of electric power due to an individual difference of the inductance. A DAB converter including: a transformer having a primary-side winding and a secondary-side winding; a first and second full bridge circuit; a first and second capacitor; and a control unit, in which, the primary and secondary side winding is connected between a midpoint and a midpoint of the first full bridge circuit, the first capacitor is connected between two input/output terminals included in the first full bridge circuit, the second capacitor is connected between two input/output terminals included in the second full bridge circuit, and the control unit configured to adjust a phase difference between the switching of the first and second full bridge circuit based on an estimated value of an inductance of the DAB converter.

公开(公告)号：US20180183344A1

公开(公告)日：2018-06-28

申请号：US15846324

申请日：2017-12-19

Applicant: TDK CORPORATION

Inventor： Kazuki IWAYA ,  Hiroshige YANAGI ,  Natsumi OGAWA ,  Toshimasa MIYAZAKI

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33584 ,  H02M1/081 ,  H02M3/33592 ,  H02M2001/009

Abstract: A converter apparatus includes: a first transformer with two windings; a first full-bridge circuit with four switches, DC input/output units connected to a first DC power supply, and AC input/output units connected via an inductor to one winding of the first transformer; a second full-bridge circuit with four switches, DC input/output units connected to a second DC power supply, and AC input/output units connected via an inductor to another winding of the first transformer; a second transformer with two windings, one being connected via an inductor to the AC input/output units of the first circuit; a third full-bridge circuit with four switches, DC input/output units connected to a third DC power supply, and AC input/output units connected via an inductor to another winding of the second transformer; and a control unit for controlling the switches to supply power between the first to third DC power supplies.

公开(公告)号：US20170111040A1

公开(公告)日：2017-04-20

申请号：US15265914

申请日：2016-09-15

Applicant: TDK Corporation

Inventor： Kazuki IWAYA

IPC: H03K17/567 ,  H03K19/0175

CPC classification number: H03K17/567 ,  H03K17/063 ,  H03K17/162 ,  H03K19/017509 ,  H03K2017/066

Abstract: There are provided a switch driving device and a switch driving method capable of preventing a self-turn-on phenomenon. The switch driving device includes: a first signal output unit configured to output a pulsed first driving signal from a first output terminal thereof; a second signal output unit configured to output a pulsed second driving signal to a control terminal of a switching element from a second output terminal thereof; and a negative power supply generating unit configured to generate a negative voltage relative to a ground voltage and bias a low level of the second driving signal toward a negative side by the negative voltage. The negative power supply generating unit includes: a first capacitor configured to store charge by the first driving signal; and a second capacitor configured to generate the negative voltage across terminals thereof by the transfer of the charge from the first capacitor.

公开(公告)号：US20160276941A1

公开(公告)日：2016-09-22

申请号：US15074023

申请日：2016-03-18

Applicant: TDK Corporation

Inventor： Kazuki IWAYA ,  Toshimasa MIYAZAKI ,  Kazu SHOJI

IPC: H02M3/335

CPC classification number: H02M3/33584 ,  H02M3/3376 ,  H02M2001/0093

Abstract: A series compensating electric power transmission system has an insulated type DC-DC converter that operates in the first through fourth quadrants, first and second DC voltage sources, and first and second power converters. In the converter, a first I/O positive terminal is connected to a first voltage source positive terminal. A first I/O negative terminal is connected to a first voltage source negative terminal. One of second I/O positive and negative terminals is connected to the first voltage source positive terminal. The other of the second I/O positive and negative terminals is connected to a second voltage source positive terminal. The first power converter converts power between the first I/O positive and negative terminals and first AC I/O terminals. The second power converter converts power between the second I/O positive and negative terminals and second AC I/O terminals. The second power converter is configured with a plurality of bidirectional switches.

Abstract translation: 串联补偿电力传输系统具有在第一至第四象限，第一和第二直流电压源以及第一和第二功率转换器中工作的绝缘型DC-DC转换器。 在转换器中，第一I / O正极端子连接到第一电压源正极端子。 第一I / O负端子连接到第一电压源负端子。 第二个I / O正极和负极之一连接到第一个电压源正极端子。 第二个I / O正极和负极中的另一个连接到第二个电压源正极端子。 第一个功率转换器将第一个I / O正极和负极端子之间的电源与第一个AC I / O端子进行转换。 第二个功率转换器在第二个I / O正极和负极端子与第二个AC I / O端子之间转换功率。 第二功率转换器配置有多个双向开关。