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公开(公告)号：US20210083594A1
公开(公告)日：2021-03-18
申请号：US17106283
申请日：2020-11-30
Applicant: DENSO CORPORATION
Inventor： Seiji IYASU , Yuji HAYASHI , Yuichi HANDA
IPC: H02M7/219 , H03K5/24 , G01R19/165 , H02M1/12
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：US20190334442A1
公开(公告)日：2019-10-31
申请号：US16504178
申请日：2019-07-05
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：US20190280603A1
公开(公告)日：2019-09-12
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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公开(公告)号：US20190229645A1
公开(公告)日：2019-07-25
申请号：US16253699
申请日：2019-01-22
Applicant: DENSO CORPORATION
Inventor： Seiji IYASU , Yuji HAYASHI , Yuichi HANDA
IPC: H02M7/5387 , H02M1/12 , H02M1/42
Abstract: In an apparatus for controlling a DC-AC converter including a reactor and a plurality of drive switches and configured to convert DC power supplied via input terminals into AC power and supply the AC power to an AC power source connected to output terminals. In the apparatus, a current corrector is configured to set a current correction value including a harmonic component for a frequency component of a supply voltage of the AC power source that has minima at zero crossings where the supply voltage is zero and superimpose the current correction value on a sinusoidal commanded current generated based on the supply voltage of the AC power source, thereby generating a commanded current after correction. A current controller is configured to operate the drive switches using peak current mode control to control the reactor current to the commanded current after correction.
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公开(公告)号：US20190149055A1
公开(公告)日：2019-05-16
申请号：US16185176
申请日：2018-11-09
Applicant: SOKEN, INC. , DENSO CORPORATION
Inventor： Kenji TOMITA , Seiji IYASU , Yuichi HANDA
CPC classification number: H02M3/33569 , H02J2007/0059 , H02M1/4225 , H02M3/156 , H02M3/337 , H02M3/3376 , H02M7/06 , H02M2001/0054 , H02M2001/007 , H02M2001/327
Abstract: An apparatus for controlling a power converter includes a first converter configured to convert an AC voltage into a DC voltage by operations of an input side switch, a DC link capacitor charged with the DC voltage from the first converter, and a second converter configured to step down the DC voltage across the DC link capacitor by operations of one or more output side switches. In the apparatus, a lower limit calculator calculates a lower limit of the DC voltage across the DC link capacitor based on an output voltage of the second converter, a turns ratio of a transformer of the second converter, and a ratio of a turn-on period to one switching period for the one or more output side switches. A switch controller operates the input side switch to control the voltage across the DC link capacitor to a command voltage higher than the lower limit.
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Patent Agency Ranking
公开(公告)号：US20170033696A1
公开(公告)日：2017-02-02
申请号：US15222628
申请日：2016-07-28
Applicant: DENSO CORPORATION
Inventor： Yuuichi HANDA , Seiji IYASU , Kimikazu NAKAMURA
CPC classification number: H02M3/33584
Abstract: A power conversion apparatus includes a power conversion circuit, a choke coil, an auxiliary coil, and a rectifier element. The choke coil is disposed between the power conversion circuit and an input side direct current power source. The auxiliary coil is magnetically coupled to the choke coil and is connected in parallel with an output side circuit. The auxiliary coil is wound in a direction so that an excitation current flows from a negative electrode to a positive electrode of the output side circuit when an excitation current flows from a positive electrode to a negative electrode of the direct current power source through the choke coil. The rectifier element is series connection with the auxiliary coil, and cuts off power supply from the direct current power source to the output side circuit through the auxiliary coil and power supply from the output side circuit to the input side.
Abstract translation: 电力转换装置包括电力转换电路，扼流线圈，辅助线圈和整流元件。 扼流线圈设置在电力转换电路和输入侧直流电源之间。 辅助线圈磁耦合到扼流圈并与输出侧电路并联连接。 当激励电流通过扼流线圈从直流电源的正电极流向负电极时，辅助线圈沿着使得激励电流从输出侧电路的负极流向正电极的方向缠绕 。 整流元件与辅助线圈串联连接，并通过辅助线圈和从输出侧电路到输入侧的电源切断直流电源到输出侧电路的电源。
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公开(公告)号：US20130069591A1
公开(公告)日：2013-03-21
申请号：US13624049
申请日：2012-09-21
Applicant: DENSO CORPORATION , NIPPON SOKEN, INC.
Inventor： Seiji IYASU , Shinji ANDOU , Sadahisa ONIMARU , Kazuyoshi OBAYASHI
IPC: H02J7/00
CPC classification number: H02J7/1461 , H02J7/1453 , Y02T10/7005
Abstract: A battery charger of a battery charging apparatus is disposed on an exterior case of an engine in such a manner that a generated heat is transferred therebetween. An ECU drives a cooling system when an engine temperature and temperature of the battery charger satisfy a predetermined cooling temperature condition. A cooling capacity for cooling the battery charger is improved by establishing a heat radiation passage to radiate a heat from the battery charger efficiently.
Abstract translation: 电池充电装置的电池充电器以发生的热量传递到发动机的外壳上。 当电池充电器的发动机温度和温度满足预定的冷却温度条件时，ECU驱动冷却系统。 通过建立热辐射通道来有效地辐射来自电池充电器的热量来提高用于冷却电池充电器的冷却能力。
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公开(公告)号：US20220231619A1
公开(公告)日：2022-07-21
申请号：US17712540
申请日：2022-04-04
Applicant: DENSO CORPORATION
Inventor： Seiji IYASU , Syusei NISHIMURA , Atsushi FUKAYA
IPC: H02M7/5387 , H02P27/06 , H02M1/08 , H03K17/082
Abstract: A power converter includes a connection path electrically connecting a negative side of a first rechargeable battery, a positive side of a second rechargeable battery electrically connected in series with the first rechargeable battery, and a neutral point of windings of a rotating electric machine. The power converter further includes a control unit configured to perform switching control of an upper-arm switch and a lower-arm switch for each phase in order to transfer energy between the first and second rechargeable batteries by conducting current between the first and second rechargeable batteries via an inverter, the windings, and the connection path.
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公开(公告)号：US20210359622A1
公开(公告)日：2021-11-18
申请号：US17369483
申请日：2021-07-07
Applicant: DENSO CORPORATION
Inventor： Seiji IYASU , Yuichi HANDA
IPC: H02M7/5387 , H02M1/00 , H02M1/08
Abstract: A controller includes first and second setting sections. The first setting section sets a first duty-cycle, which is a percentage of a switch-on time period of a drive switch in one switching-cycle, by peak current-mode control to control a reactor current to be a current-command value generated based on an AC-voltage value. The second setting section sets a second duty-cycle, which is the percentage of the switch-on time period of the drive switch in one switching-cycle, by average-current-mode control to control an average value of the reactor current to be the current-command value. The controller operates the drive switch at the first duty-cycle when an absolute value of the AC-voltage value is equal to or more than a threshold less than an amplitude of the AC-voltage value, and operates the drive switch at the second duty-cycle when the absolute value of the AC-voltage value is less than the threshold.
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公开(公告)号：US20210242791A1
公开(公告)日：2021-08-05
申请号：US17239839
申请日：2021-04-26
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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