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1. 发明授权

US10090701B2 Solar power generation system 有权
公开(公告)号：US10090701B2
公开(公告)日：2018-10-02
申请号：US14822738
申请日：2015-08-10
申请人： FUJI ELECTRIC CO., LTD.
发明人： Ryuji Yamada , Koji Kawaguchi
IPC分类号： H02J3/32 , H02J3/34 , H02J7/35 , G05F1/67 , H02M3/158 , H02J3/38
摘要： 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.

2. 发明授权

US09899835B2 Uninterruptible power supply system 有权
公开(公告)号：US09899835B2
公开(公告)日：2018-02-20
申请号：US14642649
申请日：2015-03-09
申请人： FUJI ELECTRIC CO., LTD.
发明人： Kazuaki Mino , Ryuji Yamada , Satoru Fujita
IPC分类号： H02J1/08 , H02J1/10 , H02J7/34 , H02J7/35 , H02J9/06
CPC分类号： H02J1/08 , H02J1/102 , H02J7/34 , H02J7/345 , H02J7/35 , H02J9/062 , Y02B10/72 , Y02E10/766 , Y10T307/344 , Y10T307/625
摘要： 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.

3. 发明授权

US09673625B2 Uninterruptible power supply apparatus 有权
公开(公告)号：US09673625B2
公开(公告)日：2017-06-06
申请号：US14642675
申请日：2015-03-09
申请人： FUJI ELECTRIC CO., LTD.
发明人： Ryuji Yamada , Kazuaki Mino , Ryuji Shimizu , Hirokazu Kadoi , Koji Kawaguchi
IPC分类号： H02J9/00 , H02J1/08 , H02J7/34 , G06F1/00 , H02J1/10 , H02J7/35 , H02J9/06
CPC分类号： H02J1/08 , G06F1/00 , G06F1/263 , H02J1/102 , H02J7/34 , H02J7/35 , H02J9/062 , Y02B10/72 , Y02E10/766 , Y10T307/344 , Y10T307/62
摘要： 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.

4. 发明授权

US09385624B2 Rectifier circuit 有权
标题翻译：整流电路
公开(公告)号：US09385624B2
公开(公告)日：2016-07-05
申请号：US14476047
申请日：2014-09-03
申请人： FUJI ELECTRIC CO., LTD.
发明人： Ryuji Yamada
IPC分类号： H02M5/42 , H02M7/217 , H02M7/12 , H02M7/06
CPC分类号： H02M7/217 , H02M7/06 , H02M7/12
摘要： 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.
摘要翻译：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。

5. 发明授权

US11165333B2 Snubber device and power conversion apparatus 有权
公开(公告)号：US11165333B2
公开(公告)日：2021-11-02
申请号：US16693378
申请日：2019-11-25
申请人： FUJI ELECTRIC CO., LTD.
发明人： Ryuji Yamada , Qichen Wang , Kazuyuki Yoda
IPC分类号： H02M3/315 , H02M1/34 , H02M1/32 , H05K5/02 , H05K7/20
摘要： 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.

6. 发明授权

US11038416B2 Drive signal generating circuit and power supply circuit for improving power factor thereof 有权
公开(公告)号：US11038416B2
公开(公告)日：2021-06-15
申请号：US16696688
申请日：2019-11-26
申请人： FUJI ELECTRIC CO., LTD.
发明人： Ryuji Yamada
IPC分类号： H02M1/42 , H02M1/14 , H02M3/157
摘要： 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.

7. 发明授权

US10715030B2 Power converter having an input-side converter and first and second output-side converters 有权
公开(公告)号：US10715030B2
公开(公告)日：2020-07-14
申请号：US16377101
申请日：2019-04-05
申请人： Fuji Electric Co., Ltd.
发明人： Ryuji Yamada
IPC分类号： H02M1/14 , H02M7/217 , H02M1/00
摘要： A power converter includes: an input-side converter including a positive-side capacitor arranged between a positive terminal and a neutral terminal as well as a negative-side capacitor arranged between a negative terminal and the neutral terminal; a first converter connected to the positive terminal and the neutral terminal; and a second converter, an input side thereof being connected to the negative terminal and the neutral terminal, with the input side also being connected in series to the first converter, and the output side thereof being connected in parallel to the first converter.

8. 发明授权

US10128369B2 Silicon carbide semiconductor device, method of manufacturing silicon carbide semiconductor device, and method of controlling silicon carbide semiconductor device 有权
公开(公告)号：US10128369B2
公开(公告)日：2018-11-13
申请号：US15477304
申请日：2017-04-03
申请人： Fuji Electric Co., Ltd.
发明人： Manabu Takei , Ryuji Yamada
IPC分类号： H01L29/78 , H01L29/16 , H01L29/66 , H03K17/14
摘要： In a trench-gate vertical MOSFET, an n-type drift layer and p-type base layer are epitaxially grown on an n+ silicon carbide substrate, and an n++ source region and p++ contact region are provided inside the p-type base layer. The first source electrode contacts the n++ source region, and the second source electrode contacts the p++ contact region. The first source electrode and second source electrode are separated from each other.

9. 发明授权

US10123443B2 Semiconductor device 有权
公开(公告)号：US10123443B2
公开(公告)日：2018-11-06
申请号：US14930565
申请日：2015-11-02
申请人： Fuji Electric Co., Ltd.
发明人： Hideyo Nakamura , Ryuji Yamada , Hiromu Takubo
IPC分类号： H02M7/00 , H05K1/02 , H05K1/14 , H05K7/14 , H01L23/522 , H01L23/373 , H01L23/498 , H01L23/538 , H02M7/487
摘要： 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.

10. 发明授权

US09231479B2 Power supply device 有权
标题翻译：电源设备
公开(公告)号：US09231479B2
公开(公告)日：2016-01-05
申请号：US14019221
申请日：2013-09-05
申请人： FUJI ELECTRIC CO., LTD.
发明人： Ryuji Yamada , Nobuyuki Tawada
IPC分类号： H02M1/00 , H02M1/08 , H02M3/158 , H02M3/335
CPC分类号： H02M3/335 , H02M3/158 , H02M3/33569 , H02M2001/007
摘要： 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.
摘要翻译：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。

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