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公开(公告)号：US20150194908A1
公开(公告)日：2015-07-09
申请号：US14661499
申请日：2015-03-18
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Satoru Fujita
IPC: H02M7/537
CPC classification number: H02M7/537 , H02M7/483 , H02M7/5395
Abstract: When in an operation mode in which an alternating current voltage Vout is output using a positive voltage V1 of a direct current power source 1 input via a switching element Q1, a negative voltage V2 of the direct current power source 1 input via a switching element Q2, and a zero voltage Vz input via a bidirectional switch element BS1 or an alternating current voltage Vs input via a bidirectional switch element BS2, in the period in which the polarity of the output voltage Vout and the polarity of an output current Iout are the same, a control signal of an element to be caused to perform an on/off operation is generated by being pulse-width modulated using a carrier signal S with a first frequency, and in the period in which the polarity of the output voltage Vout and the polarity of the output current Iout are different, a control signal of an element to be caused to perform an on/off operation is generated by being pulse-width modulated using a carrier signal with a second frequency lower than the first frequency.
Abstract translation: 当使用经由开关元件Q1输入的直流电源1的正电压V1输出交流电压Vout的运行模式时，经由开关元件Q2输入的直流电源1的负电压V2 ，并且在输出电压Vout的极性和输出电流Iout的极性相同的时段中，经由双向开关元件BS1输入的零电压Vz或经由双向开关元件BS2输入的交流电压Vs 通过使用第一频率的载波信号S进行脉冲宽度调制，产生要进行导通/截止操作的元件的控制信号，并且在输出电压Vout和 输出电流Iout的极性不同，通过使用具有第二频率的载波信号进行脉冲宽度调制来生成要进行导通/截止操作的元件的控制信号 低于第一频率。
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公开(公告)号：US20150180368A1
公开(公告)日：2015-06-25
申请号：US14638758
申请日：2015-03-04
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Satoru FUJITA
IPC: H02M7/539
CPC classification number: H02M7/539 , H02M1/10 , H02M1/12 , H02M1/42 , H02M5/293 , H02M7/487 , H02M7/49 , H02M7/537 , H02M2001/0012 , H02M2005/2932 , Y02B70/12
Abstract: In a power converter, in a period in which the polarities of output voltage and output current of a power converter differ, a pulse train voltage corresponding to a PWM signal is output by a first switching element and a second switching element being turned off, one element of a first switch element and a second switch element being turned on, and the other element being turned on and off based on an inverted signal of a PWM signal pulse width modulated in accordance with an output voltage command.
Abstract translation: 在功率转换器中，在功率转换器的输出电压和输出电流的极性不同的时段中，与PWM信号对应的脉冲串电压由第一开关元件和第二开关元件截止， 第一开关元件的元件和第二开关元件导通，并且另一元件基于根据输出电压命令调制的PWM信号脉冲宽度的反相信号而导通和截止。
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公开(公告)号：US20200244158A1
公开(公告)日：2020-07-30
申请号：US16693378
申请日：2019-11-25
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji YAMADA , Qichen WANG , Kazuyuki YODA
Abstract: A snubber device to be mounted to a terminal of a semiconductor module is provided. The snubber device includes n (n: integer of 1 or greater) parallel charge paths each having a positive-side capacitor, a first diode, and a negative-side capacitor sequentially connected in series between positive-side and negative-side terminals of the semiconductor module, and configured to enable current to flow from the positive-side terminal toward the negative-side terminal; and (n+1) parallel discharge paths each of which having a second diode connected between the negative-side terminal or the negative-side capacitor of an Nth charge path (N: integer within a range of 0≤N≤n) of then charge paths and the positive-side capacitor of a (N+1)th charge path of the n charge paths or the positive-side terminal, and configured to enable current to flow from the negative-side terminal toward the positive-side terminal via at least one of the negative-side and positive-side capacitors.
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公开(公告)号：US20200161851A1
公开(公告)日：2020-05-21
申请号：US16589102
申请日：2019-09-30
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Nobuyuki TAWADA
Abstract: A conventional technique makes a configuration complicated. Provided is an apparatus including: a voltage measuring unit configured to measure each of instantaneous voltages of three-phase AC voltage; and a determination unit configured to determine a state of a power supply source of the three-phase AC voltage based on a result of comparison between a comparison target value corresponding to a sum of n-th powers (n is a positive even number) of the instantaneous voltages of the three-phase AC voltage and a reference value.
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公开(公告)号：US20170367184A1
公开(公告)日：2017-12-21
申请号：US15583967
申请日：2017-05-01
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Satoru FUJITA , Takashi KUWABARA , Nobuyuki TAWADA
CPC classification number: H05K1/18 , H01F27/28 , H01F27/29 , H01F27/325 , H05K3/306 , H05K2201/1003 , H05K2201/10818
Abstract: A transformer is configured to include a pair of cores and that each have an inner leg, wherein a primary winding that is wound around a bobbin having a hollow into which the inner legs of the cores and are inserted, and a secondary winding that has a hollow into which the inner legs of the cores and are inserted and that is constituted of a conductor formed by die-cutting a metal plate into a ring, are dispersedly arranged over the inner legs of the cores and. The bobbin has bobbin support portions that come into contact with a surface of a printed circuit board on which the transformer is implemented.
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Patent Agency Ranking
公开(公告)号：US20160028232A1
公开(公告)日：2016-01-28
申请号：US14877260
申请日：2015-10-07
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Satoru FUJITA
CPC classification number: H02J3/00 , H02M1/12 , H02M5/4585 , H02M7/487 , H02M7/537 , H02M2001/0093
Abstract: A power conversion device includes an AC power source configured to output an AC voltage, a DC power source configured to output a plurality of DC voltages having different levels, an inverter configured to receive the AC voltage and the plurality of DC voltages and output an output voltage by boosting the AC voltage in a booster mode in accordance with first and second control signals, the booster mode being a mode in which a level of the AC voltage is smaller than a predetermined value, a reactor configured to smooth the output voltage of the inverter, and a control circuit configured to generate the first and second control signals using a first and second carrier signals having different frequencies, respectively, in the booster mode, and selectively output the first or second control signal in accordance with the level of the AC voltage from the AC power source.
Abstract translation: 电力转换装置包括：AC电源，其被配置为输出AC电压; DC电源，被配置为输出具有不同电平的多个DC电压;反相器，被配置为接收所述AC电压和所述多个DC电压并输出输出 电压通过根据第一和第二控制信号在升压模式中升压交流电压，升压模式是其中交流电压的电平小于预定值的模式，反应器被配置成平滑输出电压 逆变器和控制电路，被配置为在升压模式下分别使用具有不同频率的第一和第二载波信号来产生第一和第二控制信号，并且根据AC的电平有选择地输出第一或第二控制信号 交流电源的电压。
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公开(公告)号：US20230369142A1
公开(公告)日：2023-11-16
申请号：US18181171
申请日：2023-03-09
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Motohito HORI , Yoshinari IKEDA , Takaaki TANAKA , Qichen WANG
IPC: H01L21/66 , H01L23/049 , H01L23/373 , H01L23/00 , H01L25/18 , H01L25/07 , G01R31/28
CPC classification number: H01L22/32 , G01R31/2851 , H01L23/049 , H01L23/3735 , H01L24/48 , H01L25/072 , H01L25/18 , H01L2224/48139 , H01L2924/12031 , H01L2924/12032 , H01L2924/13055 , H01L2924/13091
Abstract: A semiconductor device includes a first input conductive plate on which a plurality of first semiconductor chips arranged in a first direction, a first output conductive plate extending in the first direction and being provided adjacent to the first input conductive plate, a case having first to fourth side walls for accommodating the first input conductive plate and the first output conductive plate, first main current wiring members, each of which connects one of the first output electrodes to a front surface of the first output conductive plate, a first detection terminal disposed in the first side wall, and a first detection wiring member connecting the front surface of the first output conductive plate to the first detection terminal. The first output conductive plate is disposed closer to the first side wall than is the first input conductive plate.
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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.
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公开(公告)号：US20200295652A1
公开(公告)日：2020-09-17
申请号：US16799660
申请日：2020-02-24
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Ryuji YAMADA
IPC: H02M1/34 , H02M7/00 , H02M7/5387
Abstract: A snubber module is provided, which constitutes a snubber apparatus attachable to a terminal of a semiconductor module. The snubber module includes: a positive-side capacitor, a first diode and a negative-side capacitor sequentially connected between a positive-side snubber terminal and a negative-side snubber terminal, the positive-side snubber terminal connectable to a positive-side terminal of the semiconductor module, and the negative-side snubber terminal connectable to a negative-side terminal of the semiconductor module; a first coupling terminal directly or indirectly connected to one node of either a first node between the positive-side capacitor and the first diode or a second node between the negative-side capacitor and the first diode; and a housing accommodating the positive-side capacitor, the negative-side capacitor and the first diode, and having provided therein the positive-side snubber terminal, the negative-side snubber terminal and the first coupling terminal in a manner enabling external connection.
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公开(公告)号：US20190131062A1
公开(公告)日：2019-05-02
申请号：US16111717
申请日：2018-08-24
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Qichen WANG , Satoru FUJITA
CPC classification number: H01F27/346 , H01F27/006 , H01F27/24 , H01F27/28 , H01F2027/065
Abstract: A transformer includes: a core having a shaft; primary windings; and secondary windings around the shaft alternately with the primary windings. A first number of turns of a first secondary winding, closest to a first end of the shaft, is less than a second number of turns of a second secondary winding, second closest to the first end. A third number of turns of a third secondary winding, closest to a second end of the shaft, is less than a fourth number of turns of a fourth secondary winding, second closest to the second end. The first and second windings are connected in series. The third and fourth windings are connected in series. The first and second windings are connected in parallel to the third and fourth windings. A total of the first and second numbers is equal to that of the third and fourth numbers.
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