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公开(公告)号：US20220190733A1
公开(公告)日：2022-06-16
申请号：US17686079
申请日：2022-03-03
Applicant: DENSO CORPORATION
Inventor： Shuji KURAUCHI , Yuichi HANDA , Seiji IYASU , Yuji HAYASHI
Abstract: A power conversion apparatus connected to three or more voltage units, includes three or more power conversion circuits connected to respective units of the three or more voltage units; and a multiport transformer connected to the three or more power conversion circuits at mutually different ports, in which at least one voltage unit of the three or more voltage units is an electrical load.
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公开(公告)号：US20190068070A1
公开(公告)日：2019-02-28
申请号：US16053108
申请日：2018-08-02
Applicant: DENSO CORPORATION
Inventor： Seiji IYASU , Yuji HAYASHI , Yuichi HANDA
CPC classification number: H02M3/33576 , H02M1/088 , H02M1/36 , H02M3/33584 , H02M3/3376 , H02M2001/0009
Abstract: An electric power conversion device supplies electric power of a DC power source from an input part to an output part through a power conversion circuit having a transformer and switches. The transformer has primary and secondary coils magnetically connected. The device has a choke coil, an auxiliary coil and a control part. The auxiliary coil is connected to the output part and magnetically connected to the choke coil. The auxiliary coil is wound to allow a current to flow from a negative-electrode side to a positive-electrode side of the output part when a current flows from the power source to the choke coil. The control part performs a switching control of the switches to supply electric power of the source to the output part through the auxiliary coil to prevent generation of magnetic flux in the primary coil and the current from flowing in the secondary coil.
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公开(公告)号：US20180367031A1
公开(公告)日：2018-12-20
申请号：US16061012
申请日：2016-11-16
Applicant: DENSO CORPORATION
Inventor： Keiichi ANDO , Yuichi HANDA , Kimikazu NAKAMURA , Kaoru KOKETSU , Yuki YAMADA , Seiji IYASU , Shuji KURAUCHI
CPC classification number: H02M1/44 , H01F27/24 , H01F27/28 , H02M3/28 , H02M3/33507 , H02M3/33576 , H02M3/33584 , H02M3/3382 , H02M7/003 , H05K1/115 , H05K1/184
Abstract: A power supply device includes a transformer, a primary semiconductor component, a secondary semiconductor component, a choke coil and a circuit board. Electronic components which include the transformer, the primary semiconductor component, the secondary semiconductor component, and the choke coil, are stacked in pairs, in a normal direction of a board. One pair forms a first stacked body and another pair to forms a second stacked body. A circuit board is interposed between the one pair of electronic components which forms the first stacked body, and also between the other pair of electronic components which forms the second stacked body.
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公开(公告)号：US20170113567A1
公开(公告)日：2017-04-27
申请号：US15292905
申请日：2016-10-13
Applicant: DENSO CORPORATION , TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kaoru KOKETSU , Yuichi HANDA , Seiji IYASU , Takashi NOZAWA
CPC classification number: B60L15/007 , B60L8/003 , B60L11/08 , B60L11/1868 , B60L2210/10 , B60L2210/30 , B60L2220/42 , B60Y2200/91 , B60Y2200/92 , B60Y2400/112 , H02J1/10 , H02J7/34 , H02J7/345 , H02M1/36 , H02M3/158 , Y02T10/645 , Y02T10/646 , Y02T10/70 , Y02T10/7005 , Y02T10/7066 , Y02T10/7077 , Y02T10/7083 , Y02T10/7216 , Y02T10/7241
Abstract: A control device for a power supply system includes a pre-charge unit, the power supply system having a main electric storage device, a smooth capacitor, a step-up circuit, an open-close switch, a voltage source and a regulation element. The regulation element regulates a current flowing from the smooth capacitor toward the open-close switch. The voltage source is connected to a connection portion between the open-close switch and the step-up circuit, and outputs an output voltage higher than a voltage of the main electric storage device before the open-close switch is shifted from a disconnection state to a connection state. The pre-charge unit executes a pre-charge of the smooth capacitor by supplying electric power from the voltage source to the smooth capacitor before the open-close switch is shifted from the disconnection state to the connection state.
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公开(公告)号：US20250096664A1
公开(公告)日：2025-03-20
申请号：US18962280
申请日：2024-11-27
Applicant: DENSO CORPORATION
Inventor： Shusei NISHIMURA , Seiji IYASU , Hisashi UMEMOTO , Atsushi FUKAYA
Abstract: A power conversion apparatus includes: a rotating electric machine that has a winding; an inverter that has a series-connection body of an upper arm switch and a lower arm switch; and a capacitor that is connected in parallel to the series-connection body. The power conversion apparatus includes: a connection path that, in a first storage battery and a second storage battery that are connected in series, electrically connects the winding with both a negative-electrode side of the first storage battery and a positive-electrode side of the second storage battery; and a control unit that controls switching of the upper arm switch and the lower arm switch such that a current flows between the first storage battery and the second storage battery through the inverter, the winding, and the connection path.
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Patent Agency Ranking
公开(公告)号：US20200251994A1
公开(公告)日：2020-08-06
申请号：US16854408
申请日：2020-04-21
Applicant: DENSO CORPORATION
Inventor： Seiji IYASU , Yuichi HANDA , Yuji HAYASHI , Kaoru KOKETSU
IPC: H02M3/335
Abstract: A control device is applied to a power conversion system including a first power conversion device and a second power conversion device connected in parallel with a common power supply target. The control device acquires a load output including a load current or power to be supplied to the power supply target, and control operation of the first power conversion device and the second power conversion device based on at least any of a voltage parameter including any of an input voltage and an output voltage and the load output.
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公开(公告)号：US20200161981A1
公开(公告)日：2020-05-21
申请号：US16677988
申请日：2019-11-08
Applicant: DENSO CORPORATION , IBARAKI UNIVERSITY
Inventor： Seiji IYASU , Yuji HAYASHI , Masatoshi UNO
Abstract: A power conversion apparatus performs power conversion among at least a first device, a second device, and a third device. The power conversion apparatus includes a primary converter configured to perform power conversion between the first device and second device. The primary converter includes a first switch, a second switch, a third switch, a fourth switch, and a capacitor. The second switch, the third switch, the fourth switch, and the capacitor are connected in full bridge configuration to constitute a full bridge converter.
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公开(公告)号：US20190157974A1
公开(公告)日：2019-05-23
申请号：US16191986
申请日：2018-11-15
Applicant: SOKEN, INC. , DENSO CORPORATION
Inventor： Kenji TOMITA , Seiji IYASU , Yuichi HANDA
Abstract: A control apparatus performs peak current mode control in which a drive switch is turned off when output of a comparator is inverted during an on-operation period determined by a basic signal. The comparator inverts the output when a reactor current increases to a command current. The control apparatus determines that a switching frequency of the drive switch is required to be switched when the output of the comparator is detected to have not become inverted during the single switching period while the peak current mode control is being performed. The control apparatus sets the switching frequency to a first frequency when the switching determining unit determines that the switching frequency is not required to be switched, and switches the switching frequency from the first frequency to a second frequency lower than the first frequency when the switching determining unit determines that the switching frequency is required to be switched.
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公开(公告)号：US20180342942A1
公开(公告)日：2018-11-29
申请号：US15987396
申请日：2018-05-23
Applicant: SOKEN, INC. , DENSO CORPORATION
Inventor： Seiji IYASU , Yuji HAYASHI , Yuichi HANDA
CPC classification number: H02M3/33576 , H02M2001/0009
Abstract: A control unit capable of accurately calculating a magnetization bias of a transformer is provided, thereby appropriately reducing the magnetization bias. The control unit acquires first and second currents that flow through a transformer during a period where either first or second switches individually turn ON. The control unit predicts an amount of magnetization bias in either positive side or negative side of the excitation current that flows through the transformer. The control unit reduces the magnetization bias of the transformer based on the predicted amount of magnetization bias.
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公开(公告)号：US20150280591A1
公开(公告)日：2015-10-01
申请号：US14667894
申请日：2015-03-25
Applicant: DENSO CORPORATION
Inventor： Yuuichi HANDA , Seiji IYASU , Kimikazu NAKAMURA
IPC: H02M3/335
CPC classification number: H02M3/33546 , H02M1/08 , H02M1/32 , H02M1/4225 , H02M1/4233 , H02M3/1584 , H02M3/33507 , H02M3/33569 , H02M2001/0009 , H02M2001/007 , Y02B70/126
Abstract: A power conversion apparatus for converting AC power supplied from an AC power source to DC power includes an AC-DC conversion circuit connected with the AC power source at an input end thereof for converting the AC power to DC power, a DC-DC conversion circuit connected with an output end of the AC-DC conversion circuit at an input end thereof for converting DC voltage level of the DC power generated by the AC-DC conversion circuit, a smoothing capacitor parallel connected to the output end of the AC-DC conversion circuit and the input end of the DC-DC conversion circuit, a DC link voltage detector for detecting a voltage of the smoothing capacitor as a DC link voltage, and a control unit for controlling operation of the DC-DC conversion circuit. The control unit suppresses output power of the DC-DC conversion circuit if the DC link voltage is
Abstract translation: 用于将从AC电源提供的AC电力转换为DC电力的电力转换装置包括：AC电源转换电路，其与AC电源在其输入端连接，用于将AC电力转换为DC电力; DC-DC转换电路 与AC-DC转换电路的输出端连接，用于转换由AC-DC转换电路产生的直流电力的直流电压电平，平滑电容并联连接到AC-DC转换的输出端 电路和DC-DC转换电路的输入端，用于检测作为直流链路电压的平滑电容器的电压的直流链路电压检测器和用于控制DC-DC转换电路的操作的控制单元。 如果DC链路电压为负，则控制单元抑制DC-DC转换电路的输出功率
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