-
公开(公告)号：US20200044650A1
公开(公告)日：2020-02-06
申请号：US16455806
申请日：2019-06-28
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Satoru FUJITA , Ryuji YAMADA
IPC: H03K17/693 , H01H9/54 , H01H33/59 , H01R13/703 , H02H3/087 , H03K17/0814 , H03K17/12
Abstract: Provided is a switch apparatus that provides a connection or a disconnect between an input terminal and an output terminal, including a mechanical switch section and a first semiconductor switch section that are connected in series, between the input terminal and the output terminal; a second semiconductor switch section that is connected in parallel with the mechanical switch section and the first semiconductor switch section, between the input terminal and the output terminal; and a switch control section that individually controls respective ON/OFF timings of the first semiconductor switch section and the second semiconductor switch section and an open/close timing of the mechanical switch section.
-
公开(公告)号：US20180342893A1
公开(公告)日：2018-11-29
申请号：US15936336
申请日：2018-03-26
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji YAMADA , Koji KAWAGUCHI
Abstract: A power supply device including: a positive-side and negative-side capacitors sequentially connected between a positive-side and negative-side output-terminal; a positive-side and negative-side semiconductor switches sequentially connected between the positive-side and negative-side output-terminal in parallel to the positive-side and negative-side capacitors; and a plurality of rectifying circuits, each of which has an AC input-terminal and rectifies current flowing between the AC input-terminal and the positive-side and negative-side output-terminal is provided. Each of a plurality of rectifying circuits has a positive-side rectifier which is; connected between an AC input-terminal and a positive-side output-terminal; is able to control a forward conduction state from the AC input-terminal side toward the positive-side output-terminal side; and blocks reverse current, and a negative-side rectifier which: is connected between an AC input-terminal and a negative-side output-terminal; is able to control a forward conduction state from the negative-side output-terminal side toward the AC input-terminal side; and blocks reverse current.
-
公开(公告)号：US20160192495A1
公开(公告)日：2016-06-30
申请号：US14930565
申请日：2015-11-02
Applicant: Fuji Electric Co., Ltd.
Inventor： Hideyo NAKAMURA , Ryuji YAMADA , Hiromu TAKUBO
CPC classification number: H05K7/1427 , H01L23/3735 , H01L23/49811 , H01L23/5227 , H01L23/5385 , H01L2224/0603 , H01L2924/0002 , H02M7/003 , H02M7/487 , H05K1/0265 , H05K1/145 , H05K7/1432 , H05K2201/10166 , H05K2201/10295
Abstract: A semiconductor device including: a plurality of semiconductor units each constituting a three-level inverter circuit; and a connection unit electrically connecting the plurality of semiconductor units in parallel, wherein each of the semiconductor units includes: a multi-layer substrate including an insulating plate and circuit plates disposed on a primary surface of the insulating plate; a plurality of semiconductor elements each having a back surface thereof fixed to one of the circuit plates and a front surface thereof having primary electrodes; and wiring members electrically connected to the primary electrodes of the semiconductor elements, and wherein in each of the semiconductor units, the multi-layer substrate, the plurality of semiconductor elements, and the wiring members are configured in such a way as to constitute the three-level inverter circuit.
Abstract translation: 一种半导体器件，包括：多个半导体单元，每个半导体单元构成三电平逆变器电路; 以及并联电连接多个半导体单元的连接单元，其中每个半导体单元包括：多层基板，包括绝缘板和布置在绝缘板的主表面上的电路板; 多个半导体元件，每个半导体元件的后表面固定到一个电路板，其前表面具有初级电极; 以及与半导体元件的主电极电连接的配线部件，其中，在各半导体单元中，多层基板，多个半导体元件和配线部件构成为构成三 级逆变电路。
-
公开(公告)号：US20160065077A1
公开(公告)日：2016-03-03
申请号：US14822459
申请日：2015-08-10
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji YAMADA
IPC: H02M3/335
CPC classification number: H02M3/285 , H02M1/42 , H02M2001/0045 , H02M2001/0074 , Y02B70/12
Abstract: A power supply equipment includes a plurality of units each including a capacitor and an isolated DC-DC converter connected between the both terminals of the capacitor, wherein DC input sides of the plurality of units are connected in series and the DC output sides are connected together in parallel. The DC power supply equipment also comprises control circuits to control the isolated DC-DC converters. The control circuits generate operation commands to operate some of the plurality of units in an alternating sequence with a same time ratio in a predetermined control period in a light load condition, and the control circuits control the isolated DC-DC converters of the units according to the operation command.
Abstract translation: 电源设备包括多个单元，每个单元包括电容器和连接在电容器的两个端子之间的隔离DC-DC转换器，其中多个单元的直流输入侧串联连接，直流输出侧连接在一起 在平行下。 直流电源设备还包括用于控制隔离DC-DC转换器的控制电路。 控制电路产生操作命令，以在轻负载状态下的预定控制周期中以相同的时间比以交替顺序操作多个单元中的一些，并且控制电路根据以下方式控制单元的隔离DC-DC转换器 操作命令。
-
公开(公告)号：US20140104889A1
公开(公告)日：2014-04-17
申请号：US14019221
申请日：2013-09-05
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji YAMADA , Nobuyuki TAWADA
IPC: H02M3/335
CPC classification number: H02M3/335 , H02M3/158 , H02M3/33569 , H02M2001/007
Abstract: A power supply device includes a first semiconductor switching device for controlling an alternating input current waveform, a smoothing capacitor to which a rectified voltage is applied, and an inverter that converts the rectified voltage into alternating current via a step-up chopper. The step-up chopper includes an inductor and a diode connected between the smoothing capacitor and inverter, and a second semiconductor switching device connected to the inductor and diode. The power supply device further includes an instantaneous voltage drop compensation function whereby the energy of the smoothing capacitor is supplied by an operation of the step-up chopper to the inverter when there is an instantaneous voltage drop in an alternating current power supply voltage. MOSFETs with a breakdown voltage lower than that of the first semiconductor switching device are connected between terminals of the step-up chopper, thus further reducing loss in comparison with when a bypass diode is used.
Abstract translation: 电源装置包括用于控制交流输入电流波形的第一半导体开关装置，施加整流电压的平滑电容器，以及经由升压斩波器将整流电压转换成交流电的逆变器。 升压斩波器包括连接在平滑电容器和反相器之间的电感器和二极管，以及连接到电感器和二极管的第二半导体开关器件。 电源装置还包括瞬时电压降补偿功能，其中当交流电源电压中存在瞬时电压降时，平滑电容器的能量由升压斩波器的操作提供给逆变器。 具有低于第一半导体开关器件的击穿电压的MOSFET连接在升压斩波器的端子之间，因此与使用旁路二极管相比进一步降低损耗。
-
Patent Agency Ranking
公开(公告)号：US20240243658A1
公开(公告)日：2024-07-18
申请号：US18521225
申请日：2023-11-28
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji YAMADA
IPC: H02M3/155 , G01R19/175 , H02M1/08 , H03K5/24
CPC classification number: H02M3/155 , G01R19/175 , H02M1/08 , H03K5/24
Abstract: A current detection circuit for a power supply circuit configured to generate an output voltage from an input voltage thereof, the power supply circuit including an inductor configured to receive the input voltage, a transistor configured to control an inductor current flowing through the inductor, and a diode coupled to a first node that is a node at which the inductor and the transistor are coupled. The current detection circuit is configured to detect the inductor current, and includes: a first capacitor coupled to the first node; and a second capacitor provided between the first capacitor and a ground, the second capacitor being coupled in series with the first capacitor.
-
公开(公告)号：US20230088626A1
公开(公告)日：2023-03-23
申请号：US17876337
申请日：2022-07-28
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuunosuke ARAUMI , Ryuji YAMADA
Abstract: An integrated circuit for a power supply circuit, including: a first command value output circuit outputting a first command value to turn on a transistor of the power supply circuit for a first time period; an on signal output circuit outputting an on signal to turn on the transistor; a delay circuit delaying the on signal by a predetermined time period; a correction circuit correcting the first command value, to output a second command value to turn on the transistor for a second time period; and a driver circuit turning on and off the transistor based respectively on the delayed on-signal and the second command value. The correction circuit corrects the first command value based on the predetermined time period and a ratio between the second time period and another time period from when the transistor is turned off to when an inductor current of the power supply circuit reaches a predetermined value.
-
公开(公告)号：US20220224221A1
公开(公告)日：2022-07-14
申请号：US17456575
申请日：2021-11-25
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Ryuji YAMADA
Abstract: Provided is a snubber apparatus comprising: N parallel charge paths, each of which has a positive-side capacitor, a first diode, and a negative-side capacitor sequentially connected in series between a positive-side terminal and a negative-side terminal, and that allows current to flow from the positive-side terminal's side to the negative-side terminal's side; and N+1 parallel discharge paths, each of which has a second diode connected between the negative-side terminal or the negative-side capacitor in the k-th charge path of the N charge paths, and the positive-side capacitor in the (k+1)-th charge path of the N charge paths or the positive-side terminal, and that allows current to flow from the negative-side terminal's side to the positive-side terminal's side via at least one of the negative-side capacitor and the positive-side capacitor, at least one of the charge paths having a plurality of sections are turned and adjacent to each other.
-
公开(公告)号：US20220209647A1
公开(公告)日：2022-06-30
申请号：US17511070
申请日：2021-10-26
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji YAMADA
Abstract: A switching control circuit for controlling a power supply circuit that includes an inductor receiving a rectified voltage corresponding to an AC voltage, and a transistor controlling an inductor current flowing through the inductor. The switching control circuit controls switching of the transistor, and includes an output circuit, a processing circuit and a drive signal output circuit. The output circuit sequentially receives a first voltage, which fluctuates at a frequency twice a frequency of the AC voltage, and outputs, as a second voltage, the received first voltage after a delay of a predetermined period of time. The processing circuit processes the first voltage based on a value corresponding to the second voltage, to remove a ripple component generated in an output voltage and contained in the first voltage. The drive signal output circuit outputs a drive signal for driving the transistor, in response to a processing result of the processing circuit.
-
公开(公告)号：US20210376738A1
公开(公告)日：2021-12-02
申请号：US17212005
申请日：2021-03-25
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuunosuke ARAUMI , Ryuji YAMADA
Abstract: A switching control circuit for controlling an LLC converter that includes a first switching device, a first free-wheeling diode connected in parallel with the first switching device, a second switching device connected in series with the first switching device and the first free-wheeling diode, and a second free-wheeling diode connected in parallel with the second switching device. The switching control circuit is configured to control switching of the first and second switching devices. The switching control circuit includes a determination circuit configured to determine whether an operation mode of the LLC converter is a first mode or a second mode based on the resonant current of the LLC converter, and a drive signal output circuit configured to output first and second drive signals for respectively switching the first switching device and the second switching device based on the determined operation mode, to thereby prevent a shoot-through current from flowing through the first switching device or the second switching device.
-
-
-
-
-
-
-
-
-
Search Results
51
records
(took 0.02 seconds)
