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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：US20140226368A1
公开(公告)日：2014-08-14
申请号：US14176454
申请日：2014-02-10
Applicant: NIPPON SOKEN, INC. , DENSO CORPORATION
Inventor： Norihito KIMURA , Kimikazu NAKAMURA , Yuji HAYASHI
IPC: H02M3/335
CPC classification number: H02M3/33507 , H02M2001/0041
Abstract: A power conversion apparatus includes a switch circuit which drives switching elements based on a control signal, a feedback section which performs feedback control, a signal output section which outputs the control signal based on a controlled variable of the feedback control, an output value detecting section which detects an output value outputted from the switch circuit, and an operation determining unit which has an operation stop determination section which determines whether to stop operation of the switching elements based on a rate of change of the output value, and an operation start determination section which determines whether to start operation of the switching elements based on the controlled variable.
Abstract translation: 电力转换装置包括：基于控制信号驱动开关元件的开关电路;执行反馈控制的反馈部;基于反馈控制的受控变量输出控制信号的信号输出部;输出值检测部; 其检测从开关电路输出的输出值，以及操作判定单元，其具有基于输出值的变化率决定是否停止开关元件的动作的动作停止判定部，以及操作开始判定部 其基于受控变量确定是否开始操作开关元件。
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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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公开(公告)号：US20190305664A1
公开(公告)日：2019-10-03
申请号：US16370842
申请日：2019-03-29
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 a voltage obtainer obtains an alternating-current voltage. A slope compensation unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a slope compensation signal having a slope that depends on the alternating-current voltage, and adds the slope compensation signal to the inductor current obtained by the current obtainer. A current controller controls on-off switching operations of a switch in a peak current mode to thereby cause the inductor current, to which the slope compensation signal has been added, to follow a sinusoidal command current that depends on the alternating-current voltage.
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Patent Agency Ranking
公开(公告)号：US20190100171A1
公开(公告)日：2019-04-04
申请号：US16086566
申请日：2017-02-07
Applicant: DENSO CORPORATION
Inventor： Eiji INA , Keita SAITO , Yuji HAYASHI , Keita KAWAI , Tomoyuki KIKUTA
CPC classification number: B60S1/56 , B08B3/02 , B60R1/00 , B60S1/52 , B60S1/54 , B60S1/60 , H04N5/225 , H04N7/18
Abstract: An onboard optical sensor cleaning device ejects fluid against a sensing surface of an onboard optical sensor installed in a vehicle and removes foreign matter from the sensing surface. The onboard optical sensor cleaning device includes a cleaning liquid ejection port that ejects supplied cleaning liquid and an air ejection port that ejects supplied air. The cleaning liquid ejection port and the air ejection port are independent from each other, an air ejection axis of the air ejection port is set so that the ejected air mixes with the cleaning liquid ejected from the cleaning liquid ejection port and to be directed toward the sensing surface.
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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：US20210009088A1
公开(公告)日：2021-01-14
申请号：US17030820
申请日：2020-09-24
Applicant: DENSO CORPORATION
Inventor： Yuji HAYASHI , Kohei TOYAMA
IPC: B60S1/56 , B08B3/02 , B08B5/02 , B08B7/04 , B08B13/00 , B60S1/48 , B60S1/54 , B60S1/52 , B60Q9/00
Abstract: A vehicle-mounted sensor cleaning device cleans a sensing surface of a vehicle-mounted sensor. The vehicle-mounted sensor cleaning device includes a gas nozzle spraying a gas toward the sensing surface, a gas supply device supplying the gas to the gas nozzle, and a control section controlling operation of the gas supply device. A predetermined value is set in the control section, for indicating an abnormal state of detection accuracy of the vehicle-mounted sensor based on detection accuracy information of an object which is obtained from the vehicle-mounted sensor. A gas supply threshold value is also set, for use in operating the gas supply device to direct a supply of the gas toward the sensing surface before the detection accuracy information becomes equal to or lower than the predetermined value. If the detection accuracy information has become lower than the gas supply threshold value, the control section operates the gas supply device.
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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：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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