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公开(公告)号：US10917022B2
公开(公告)日：2021-02-09
申请号：US16314043
申请日：2017-06-06
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Tetsuo Akita , Yusuke Shimizu , Naoki Ayai
Abstract: This power conversion device includes: a power conversion unit 20 provided between a DC power supply 2 and an AC electric path 3 and configured to perform DC/AC power conversion; and a control unit 14 configured to control the power conversion unit 20. The control unit 14 includes a determination unit 25 configured to determine whether or not a starting current has flowed through the AC electric path 3, and an adjustment unit 26 configured to adjust an AC voltage generated by the power conversion unit 20, on the basis of a result of the determination by the determination unit 25.
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公开(公告)号：US20200036069A1
公开(公告)日：2020-01-30
申请号：US16496873
申请日：2017-11-09
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Tetsuo Akita , Mitsuyasu Ueda , Naoki Ayai
IPC: H01M10/667 , H01M2/10 , H01M10/6563 , H01M10/613
Abstract: A power storage device according to an aspect of the present disclosure includes: a casing including a bottom wall and a top wall opposite to the bottom wall; a storage battery; an electrical unit; and a cooling unit. The storage battery is disposed in the casing and separated from the bottom wall. The electrical unit is disposed in the casing and located closer to the top wall than the storage battery is. A first fan is disposed between the storage battery and the electrical unit and configured to direct air from the storage battery toward the electrical unit.
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公开(公告)号：US10277036B2
公开(公告)日：2019-04-30
申请号：US14891292
申请日：2014-05-22
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Naoki Ayai , Kenji Abiru , Toshiaki Okumura
Abstract: An inverter device includes a circuit configuration for converting, to AC power, DC powers respectively given from a first power supply and a second power supply which outputs power with voltage lower than that of the first power supply. The inverter device includes: a first step-up circuit; a second step-up circuit; an inverter circuit connected to both step-up circuits connected in parallel to each other, the inverter circuit configured to convert powers given from both step-up circuits to AC power; and a control unit configured to multiply a power value including the AC power outputted from the inverter circuit, by a ratio of a power value of the DC power of each step-up circuit to a total power value obtained by summing the DC powers of both step-up circuits, and set a current target value for each step-up circuit based on a value obtained by the multiplication.
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公开(公告)号：US20180287390A1
公开(公告)日：2018-10-04
申请号：US15765921
申请日：2016-10-20
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Yoshiharu Nakajima , Naoki Ayai , Yusuke Shimizu
IPC: H02J3/38 , H02J7/35 , H02M3/158 , H02M7/5387 , H02J7/00
Abstract: This power conversion system is composed of a DC power supply circuit and a power conditioner which are connected to each other. The power conditioner includes: a first DC/DC converter provided between the DC power supply circuit and a DC bus; and an inverter provided between the DC bus and an AC electric path and configured to perform switching operation in such a manner that the inverter and the first DC/DC converter alternately have stop periods in an AC half cycle. The DC power supply circuit includes: a storage battery; and a second DC/DC converter of a bidirectional type, provided between the storage battery and the first DC/DC converter and including a DC reactor. The power conversion system includes a control unit configured to control current flowing through the DC reactor of the second DC/DC converter to have a constant value.
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公开(公告)号：US20180205262A1
公开(公告)日：2018-07-19
申请号：US15744145
申请日：2016-07-19
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Tetsuo Akita , Naoki Ayai
CPC classification number: H02J9/06 , H01H9/106 , H01H9/542 , H01H9/548 , H01H85/04 , H01H85/46 , H01H2009/544 , H02H3/046 , H02H3/08 , H02H7/26 , H02J7/0065 , H02J9/062 , H02J2007/0067
Abstract: This power supply device includes: an AC path from an input end to an output end; a current sensor configured to detect a current flowing through the AC path; a conversion unit connected to the AC path and being capable of bidirectional power conversion; a storage battery connected to the AC path via the conversion unit; an AC switch provided between the input end and a point at which the conversion unit is connected to the AC path, the AC switch including parallel body of a relay contact and a semiconductor switch; and a control unit configured to control the conversion unit and the AC switch. When the control unit executes a current conduction mode for the first time, and when the current sensor detects an excessive current during the current conduction mode, the control unit closes only the relay contact while keeping the semiconductor switch opened.
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Patent Agency Ranking
公开(公告)号：US20180183319A1
公开(公告)日：2018-06-28
申请号：US15738297
申请日：2016-06-20
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Tetsuo Akita , Naoki Ayai
CPC classification number: H02M1/083 , H02J7/0068 , H02J7/0081 , H02J7/022 , H02J7/045 , H02J9/062 , H02M3/155 , H02M3/158 , H02M7/5387 , H02M7/797 , H02M2001/0054 , H02M2001/0058 , H02M2001/007 , Y02B70/1491
Abstract: A power conversion device includes a switch connected to an AC system; an AC/DC converter; and a DC/DC converter. A control unit compares an absolute value of an AC voltage target value based on the AC voltage with a DC voltage target value based on the storage battery voltage, and executes, on the basis of a magnitude relation of the values, a control method such that a period during which step-up operation is performed through switching operation mainly using one of the AC/DC converter and the DC/DC converter, and a period during which step-down operation is performed through switching operation mainly using the other one of the converters, alternately arise. When starting charging/discharging of the storage battery, the control unit causes the switch to close at zero cross timing of the AC voltage, and thereafter, causes charging/discharging to start from the switching operation through which the step-down operation is performed.
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7.发明申请公开(公告)号：US20160336873A1
公开(公告)日：2016-11-17
申请号：US15110510
申请日：2015-01-05
Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Inventor： Naoki Ayai
IPC: H02M7/5387 , H02M1/12
CPC classification number: H02M7/5387 , H02M1/12 , H02M3/33576 , H02M7/49 , H02M2001/007 , H02M2001/0083
Abstract: Provided is a power conversion device including: a conversion device for each phase which converts DC voltage inputted from a DC power supply, to voltage having an AC waveform to be outputted to each phase with respect to a neutral point of three-phase AC; and a control unit which controls these conversion devices. Each conversion device includes: a first converter which has a DC/DC converter including an isolation transformer, and a capacitor, and which converts the inputted DC voltage to voltage containing a pulsating DC voltage waveform corresponding to the absolute value of the AC waveform to be outputted; and a second converter which is provided at a stage subsequent to the first converter and has a full-bridge inverter, and which inverts the polarity of the voltage containing the pulsating DC voltage waveform, per one cycle, thereby converting the voltage to voltage having the AC waveform.
Abstract translation: 本发明提供一种电力转换装置，其特征在于包括：将从直流电源输入的直流电压转换成相位相对于三相交流的中性点输出到各相的交流波形的各相的转换装置; 以及控制这些转换装置的控制单元。 每个转换装置包括：第一转换器，其具有包括隔离变压器的DC / DC转换器和电容器，并将输入的直流电压转换为包含对应于交流波形的绝对值的脉动直流电压波形的电压为 输出 以及第二转换器，其被设置在所述第一转换器之后的阶段并且具有全桥反相器，并且每一个周期使包含所述脉动直流电压波形的电压的极性反相，从而将所述电压转换为具有 交流波形。
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公开(公告)号：US20160268890A1
公开(公告)日：2016-09-15
申请号：US15032197
申请日：2014-12-19
Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Inventor： Naoki Ayai , Tetsuo Akita , Toshiaki Okumura , Kenji Abiru
CPC classification number: H02M7/44 , H02M1/08 , H02M1/42 , H02M3/04 , H02M3/156 , H02M7/48 , H02M2001/0009 , H02M2001/007
Abstract: Provided is a conversion device that converts DC power provided from a DC power supply, to AC power and supplies the AC power to a load, the conversion device including: a filter circuit connected to the load and including an AC reactor and a first capacitor; a DC/AC inverter connected to the load via the filter circuit; a DC/DC converter provided between the DC power supply and the DC/AC inverter; a second capacitor provided between the DC/AC inverter and the DC/DC converter; and a control unit configured to set a current target value for the DC/DC converter to thereby be synchronized with current of the AC power, based on voltage of the AC power, voltage variation due to current flowing through the AC reactor and an impedance thereof, reactive currents respectively flowing through the first capacitor and the second capacitor, and voltage of the DC power.
Abstract translation: 提供一种转换装置，其将从直流电源提供的直流电力转换为交流电，并将交流电力提供给负载，转换装置包括：连接到负载并包括交流电抗器和第一电容器的滤波器电路; 通过滤波电路连接到负载的DC / AC逆变器; DC / DC转换器，设置在DC电源和DC / AC逆变器之间; 设置在DC / AC逆变器和DC / DC转换器之间的第二电容器; 以及控制单元，其被配置为基于AC电力的电压，由于流过AC电抗器的电流引起的电压变化及其阻抗，将DC / DC转换器的电流目标值设定为与AC电力的电流同步 ，分别流过第一电容器和第二电容器的无功电流以及直流电力的电压。
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公开(公告)号：US10476259B2
公开(公告)日：2019-11-12
申请号：US16308106
申请日：2017-03-06
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Toshiaki Okumura , Naoki Ayai , Koichi Takeshita , Fumio Urakawa , Shinjirou Shinada , Tadatsugu Udono
Abstract: A power conversion device provided between a DC power supply and an AC electric path, including: a breaking device provided to at least one line of an output electric path in the power conversion device; a first voltage sensor provided on a primary side of the breaking device; a second voltage sensor provided on a secondary side of the breaking device; and a determination unit which calculates a primary-side voltage and a secondary-side voltage, and a primary-side phase and a secondary-side phase and determines that the breaking device is opened, by occurrence of an event in which an absolute value of a voltage difference between the primary-side voltage and the secondary-side voltage is greater than a voltage difference threshold value and an absolute value of a phase difference between the primary-side phase and the secondary-side phase is greater than a phase difference threshold value.
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公开(公告)号：US20190237995A1
公开(公告)日：2019-08-01
申请号：US16313698
申请日：2017-06-07
Applicant: Sumitomo Electric Industries, Ltd.
Inventor： Tetsuo Akita , Naoki Ayai
CPC classification number: H02J9/062 , H01M10/44 , H02J3/38 , H02J7/022 , H02J7/35 , H02J9/06 , H02M7/68 , Y02B10/72
Abstract: This power supply device includes: a power interconnection path connecting a power interconnection port to a power conversion unit via a first switch; a stand-alone power supply path leading from an auxiliary input port via a second switch to an output port to which a load is connected; a storage-battery-side power supply path leading from a storage battery via the power conversion unit to the output port; and a control unit, the control unit causing the power conversion unit to charge/discharge the storage battery when interconnected with a commercial power grid, the control unit supplying power to the load via one of the stand-alone power supply path and the storage-battery-side power supply path when disconnected from the commercial power grid, the control unit switching the power supply path from the one to the other within an extremely short time period such as not to influence the load.
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