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公开(公告)号：US12166413B2
公开(公告)日：2024-12-10
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.
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2.发明授权公开(公告)号：US12051964B2
公开(公告)日：2024-07-30
申请号：US17482683
申请日：2021-09-23
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuunosuke Araumi , Ryuji Yamada
CPC classification number: H02M1/0009 , G01R15/16 , G01R19/10 , G01R19/14 , G01R19/2513 , H02M3/33571
Abstract: A current detection circuit configured to detect a resonant current of a power supply circuit. The power supply circuit includes a resonant circuit that has an inductor and a first capacitor having a first end and a second end. The current detection circuit includes a second capacitor having a first end and a second end, and a non-linear circuit provided between the second end of the second capacitor and the second end of the first capacitor. The first end of the second capacitor is coupled to the first end of the first capacitor.
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公开(公告)号：US10090701B2
公开(公告)日：2018-10-02
申请号：US14822738
申请日：2015-08-10
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji Yamada , Koji Kawaguchi
Abstract: A solar power generation system includes a plurality of solar cell groups, a plurality of chopper units each of which corresponds to one of the plurality of solar cell groups and raises a DC voltage obtained from the corresponding solar cell group. Each of the plurality of chopper units includes a first operating point control unit that respectively controls an output current of the corresponding chopper unit to optimize an operating point of each of the plurality of solar cell groups so as to obtain maximum power from the respective solar cell groups, and an inverter, which receives the DC voltage obtained from the plurality of chopper units and outputs AC power. The inverter includes a second operating point control unit that controls the DC voltage obtained from the plurality of chopper units to optimize the operating point of each of the plurality of solar cell groups.
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公开(公告)号：US09899835B2
公开(公告)日：2018-02-20
申请号：US14642649
申请日：2015-03-09
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Kazuaki Mino , Ryuji Yamada , Satoru Fujita
CPC classification number: H02J1/08 , H02J1/102 , H02J7/34 , H02J7/345 , H02J7/35 , H02J9/062 , Y02B10/72 , Y02E10/766 , Y10T307/344 , Y10T307/625
Abstract: Provided is an uninterruptible power supply system. The uninterruptible power supply system includes a power supply unit including a power supply circuit converting alternating current power into direct current voltage to be supplied to a load apparatus. The uninterruptible power supply system includes a battery unit including a battery circuit. The battery circuit stores direct current power and discharges the direct current power to generate direct current voltage to be supplied to the load apparatus. The uninterruptible power supply system includes a rack in which each of the power supply unit and the battery unit is mounted.
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公开(公告)号：US09673625B2
公开(公告)日：2017-06-06
申请号：US14642675
申请日：2015-03-09
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji Yamada , Kazuaki Mino , Ryuji Shimizu , Hirokazu Kadoi , Koji Kawaguchi
CPC classification number: H02J1/08 , G06F1/00 , G06F1/263 , H02J1/102 , H02J7/34 , H02J7/35 , H02J9/062 , Y02B10/72 , Y02E10/766 , Y10T307/344 , Y10T307/62
Abstract: An uninterruptible power supply apparatus includes a power supply unit converting AC power to generate a DC voltage to be supplied to a loading device. The uninterruptible power supply apparatus further includes a first battery unit connected to the power supply unit to receive a DC current therefrom, and stores first DC power generated from the DC voltage. The first battery unit generates a DC voltage to be supplied to the loading device from the first DC power. The uninterruptible power supply apparatus includes a second battery unit connected in parallel to the power supply unit and stores second DC power, and generates, from the second DC power stored in the second battery unit, a DC voltage to be supplied to the loading device. The uninterruptible power supply apparatus further includes a controller for controlling operation of the power supply unit, the first battery unit and the second battery unit.
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Patent Agency Ranking
公开(公告)号：US09385624B2
公开(公告)日：2016-07-05
申请号：US14476047
申请日：2014-09-03
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji Yamada
Abstract: A rectifier circuit includes an inductor connected to AC inputs of a diode bridge circuit, a capacitor series circuit connected to a DC output, and bi-directional switches that are connected between the series connection point of the capacitors and the AC inputs of the diode bridge circuit. In order to reduce the loss that would occur if both bi-directional switches were driven at high frequency, one of the bi-directional switches is driven at the frequency of the AC input voltage and the other bi-directional switch is driven at a high frequency, and also general rectifying diodes are used as the diodes connected to the bi-directional switch that is driven at the frequency of the AC input voltage and fast recovery diodes are used as the diodes connected to the bi-directional switch that is driven at high frequency.
Abstract translation: 整流电路包括连接到二极管电桥的AC输入的电感器，连接到DC输出的电容器串联电路，以及连接在电容器的串联连接点和二极管桥的AC输入端之间的双向开关 电路。 为了减少两个双向开关以高频驱动的损耗，双向开关之一以交流输入电压的频率驱动，另一个双向开关被驱动高电平 频率以及通用整流二极管被用作连接到以交流输入电压的频率驱动的双向开关的二极管，并且快速恢复二极管用作连接到双向开关的二极管，所述二极管被驱动在 高频。
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公开(公告)号：US12081116B2
公开(公告)日：2024-09-03
申请号：US17877377
申请日：2022-07-29
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji Yamada , Ryuunosuke Araumi
CPC classification number: H02M1/4225 , H02M1/0012 , H02M1/08
Abstract: A switching control circuit for a power supply circuit, including: a first command value output circuit outputting a first command value; a correction circuit correcting the first command value, to output a second command value; a first timer circuit measuring a first time period starting from a first timing at which a transistor of the power supply circuit is turned on; and a driving signal output circuit outputting a driving signal to turn on the transistor in response to an inductor current of the power supply circuit reaching a predetermined value and the first time period having elapsed since the first timing, and outputting the driving signal to turn off the transistor based on the second command value. The correction circuit causes an on time period of the transistor to increase, when the first time period has elapsed since the first timing, after the inductor current reaches the predetermined value.
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公开(公告)号：US11742746B2
公开(公告)日：2023-08-29
申请号：US17511070
申请日：2021-10-26
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji Yamada
CPC classification number: H02M1/14 , H02M1/0025 , H02M1/08 , H02M1/4208
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.
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公开(公告)号：US11165333B2
公开(公告)日：2021-11-02
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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10.发明授权公开(公告)号：US11038416B2
公开(公告)日：2021-06-15
申请号：US16696688
申请日：2019-11-26
Applicant: FUJI ELECTRIC CO., LTD.
Inventor： Ryuji Yamada
Abstract: A drive signal generating circuit that generates a drive signal for turning on and off a transistor based on an output voltage and an inductor current flowing through an inductor, includes: a reference current output unit that outputs a reference current serving as a reference for the inductor current; a command value output unit that outputs a command value for increasing and decreasing the inductor current when the inductor current is smaller and greater than the reference current, respectively; and a drive signal output unit that outputs the drive signal based on the command value such that the output voltage achieves a target level, the reference current output unit configured to output the reference current based on the command value output from the command value output unit and a value corresponding to a first error between a level of the output voltage and the target level.
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