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公开(公告)号：US12191739B2
公开(公告)日：2025-01-07
申请号：US17385789
申请日：2021-07-26
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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公开(公告)号：US10256719B2
公开(公告)日：2019-04-09
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
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：US11418128B2
公开(公告)日：2022-08-16
申请号：US17106283
申请日：2020-11-30
Applicant: DENSO CORPORATION
Inventor： Seiji Iyasu , Yuji Hayashi , Yuichi Handa
IPC: H02M7/219 , H02M1/12 , G01R19/165 , H03K5/24 , H02M1/00
Abstract: A control apparatus is provided for controlling an electric power conversion apparatus. The electric power conversion apparatus includes a reactor and a drive switch and is configured to convert one of an AC voltage and a DC voltage into the other of the AC voltage and the DC voltage. The control apparatus is configured to: acquire a current detection value that is a detected value of reactor current flowing through the reactor; acquire the AC voltage; calculate, based on the AC voltage, a command value of the reactor current; set a correction value based on the AC voltage; calculate a post-correction current detection value by subtracting the correction value from the current detection value; and operate the drive switch through peak current mode control, thereby controlling the post-correction current detection value to be in agreement with the command value.
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公开(公告)号：US11183944B2
公开(公告)日：2021-11-23
申请号：US17066973
申请日：2020-10-09
Applicant: DENSO CORPORATION
Inventor： Seiji Iyasu , Yuji Hayashi , Yuichi Handa
Abstract: In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and an alternating-current voltage obtainer obtains an alternating-current voltage. A drive signal outputting unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a sinusoidal command. The drive signal outputting unit performs peak-current mode control to output a drive signal that controls switching of the drive switch to thereby cause the inductor current to follow the sinusoidal command. A delay unit delays, for one switching cycle of the drive switch, an off-switching timing of the drive switch in accordance with the alternating-current voltage. The drive signal defines the off-switching timing of the switch.
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公开(公告)号：US10897208B2
公开(公告)日：2021-01-19
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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Patent Agency Ranking
公开(公告)号：US10075059B2
公开(公告)日：2018-09-11
申请号：US15816555
申请日：2017-11-17
Applicant: DENSO CORPORATION
Inventor： Seiji Iyasu , Yuji Hayashi , Kimikazu Nakamura , Yuichi Handa
CPC classification number: H02M1/088 , G01R19/22 , G01R31/42 , H02M3/33592 , H02M2001/0009 , Y02B70/1475
Abstract: A current detection apparatus is provided which detects a current flowing through a detection part in an electrical circuit. The current detection apparatus includes a first coil connected in series with the detection part, a second coil magnetically coupled with the first coil, a full-wave rectifier circuit connected to both ends of the second coil, a switching element having a first end connected to a positive electrode side output part of the full-wave rectifier circuit and a second end connected to a first resistor, and a second resistor that forms a closed circuit with the second coil regardless of an open or closed state of the switching element.
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公开(公告)号：US11316434B2
公开(公告)日：2022-04-26
申请号：US16594123
申请日：2019-10-07
Applicant: DENSO CORPORATION
Inventor： Yoshiki Suzuki , Shuji Kurauchi , Yuichi Handa , Seiji Iyasu , Yuji Hayashi
Abstract: An electric power conversion apparatus includes a main DC-to-DC converter and an electric power conversion unit. The main DC-to-DC converter is configured to perform voltage conversion between a first-voltage section that operates at a first voltage and a second-voltage section that operates at a second voltage. The electric power conversion unit is connected with the first-voltage section and includes an electric power conversion section and an auxiliary DC-to-DC converter. The electric power conversion section is configured to perform electric power conversion between the first-voltage section and a third-voltage section that operates at a third voltage. The auxiliary DC-to-DC converter is connected in parallel with the main DC-to-DC converter. The auxiliary DC-to-DC converter shares a common configuration section with the electric power conversion section. The common configuration section is constituted of at least part of the electric power conversion section.
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公开(公告)号：US11245326B2
公开(公告)日：2022-02-08
申请号：US17073830
申请日：2020-10-19
Applicant: DENSO CORPORATION
Inventor： Seiji Iyasu , Yuji Hayashi , Yuichi Handa
Abstract: The control apparatus is used with the electrical power converter working to an inputted one of ac voltage and a terminal-to-terminal voltage at a capacitor into the other. The control apparatus calculates a sine-wave command value for a reactor current based on the ac voltage and an amplitude command value indicating an amplitude of the reactor current. The control apparatus also operates switches SW in peak-current mode control to bring the reactor current into agreement with a command value for the reactor current to which a current correction value is added. The control apparatus sets the current correction value to include a component of fluctuation in the terminal-to-terminal voltage at the capacitor based on the ac voltage Vac.
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公开(公告)号：US10686374B2
公开(公告)日：2020-06-16
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：US10461650B2
公开(公告)日：2019-10-29
申请号：US16292709
申请日：2019-03-05
Applicant: DENSO CORPORATION
Inventor： Kenji Tomita , Seiji Iyasu , Yuichi Handa
Abstract: In a control device applied to an insulated DC-DC converter including a transformer and drive switches connected to a input winding of the transformer, the control device operates the drive switches to control an output voltage output via the output winding to a target voltage. Furthermore, the control device includes a voltage acquiring unit acquiring the output voltage and a frequency setting unit setting a switching frequency for the drive switches based on the output voltage acquired by the voltage acquiring unit. The frequency setting unit sets, for the switching frequency, a value increasing with a value of the acquired output voltage, and sets the switching frequency such that an increase in the value of the output voltage increases a frequency increase rate corresponding to an amount of increase in the switching frequency per unit amount of increase in the output voltage.
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