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公开(公告)号：US12036893B2
公开(公告)日：2024-07-16
申请号：US17570057
申请日：2022-01-06
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi , Syuji Kurauchi , Yuuichi Handa
IPC: B60L58/27 , B60L53/60 , B60L58/25 , H01M10/625 , H01M10/633 , H01M10/6567 , H01M10/6571 , H02J7/00 , H02M3/00 , H02M3/335
CPC classification number: B60L58/27 , B60L53/60 , B60L58/25 , H01M10/625 , H01M10/633 , H01M10/6567 , H01M10/6571 , H02J7/007192 , H02M3/00 , H02M3/335 , B60L2210/10 , H01M2220/20 , H02M3/33573
Abstract: A power supply system includes a power conversion circuit that is connectable to a power storage unit. The power supply system includes a control unit and a heat transferring unit. The control unit supplies a current between the power storage unit and the power conversion circuit by performing on-off control of a switch that configures the power conversion circuit. The heat transferring unit absorbs heat that is generated in the power conversion circuit in accompaniment with the on-off control of the switch and transfers the heat to a temperature-increase target element. The control unit performs temperature-increase mode control in which the switch is on-off controlled such that an amount of heat that is generated in the power conversion circuit is increased when a temperature-increase request for the temperature-increase target element is present, compared to when the temperature-increase request is not present.
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公开(公告)号：US11258351B2
公开(公告)日：2022-02-22
申请号：US16910772
申请日：2020-06-24
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi , Seiji Iyasu , Yuichi Handa
Abstract: A control unit determines a polarity of an actual voltage value of an AC power supply if it is either positive or negative based on a detection voltage thereof detected by the voltage detector. The control unit alternately actuates a set of a first switch and a fourth switch and another set of the second switch and a third switch each time when it is determined that the polarity of the actual voltage value of the AC power supply changes. A second reactor is disposed at at least one of first and second positions. The first position is located between a first AC side terminal and a connection point located between the first switch and the second switch. The second position is located between a second AC side terminal and a connection point located between the third switch and the fourth switch.
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公开(公告)号：US10910958B2
公开(公告)日：2021-02-02
申请号：US16699228
申请日：2019-11-29
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi , Seiji Iyasu , Yuichi Handa
IPC: H02M7/797 , H02M1/08 , G01R19/165 , H02M1/32 , H02M1/00
Abstract: In a control apparatus, a voltage obtainer obtains an alternating-current voltage having a polarity across first and second alternating-current terminals. An overcurrent determiner determines whether a target current flowing through the first and second alternating-current terminals is in an overcurrent state. A controller alternately turns on a first set of first and fourth switches and a second set of second and third switches in accordance with the polarity of the alternating-current voltage. The controller changes a switching operation of at least one of the first to fourth switch being in an on state to thereby reduce the target current flowing through the first and second alternating-current terminals upon determination that the target current flowing through the first and second alternating-current terminals is in the overcurrent state.
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Patent Agency Ranking
公开(公告)号：US10804831B2
公开(公告)日：2020-10-13
申请号：US16254327
申请日：2019-01-22
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi
Abstract: In a magnetic flux variation estimator of a control apparatus, a command voltage corrector corrects d- and q-axis command voltages to reduce a deviation between each of the d- and q-axis command voltages and a corresponding actual voltage to be applied to a rotary electric machine, thus outputting a corrected d-axis command voltage and a corrected q-axis command voltage. A standard voltage calculator calculates, based on an electrical angular velocity of the rotary electric machine and a current flowing in the rotary electric machine, a d-axis standard voltage and a q-axis standard voltage to be applied to the rotary electric machine while the rotary electric machine is in a predetermined standard state. An estimator estimates a magnetic flux variation as a function of the corrected d-axis command voltage, the corrected q-axis command voltage, and the q-axis standard voltage.
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公开(公告)号：US12015351B2
公开(公告)日：2024-06-18
申请号：US17730417
申请日：2022-04-27
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi , Syuji Kurauchi , Yuuichi Handa
IPC: H02M3/335 , H02M1/32 , H02M3/158 , B60R16/033
CPC classification number: H02M3/33573 , H02M1/32 , H02M3/158 , H02M3/33576 , B60R16/033
Abstract: A power conversion apparatus includes an input side terminal, an output side terminal and a switch unit, switching the switch unit between ON and OFF during a power transmission. The switch unit has characteristics that, in the case where a reverse current flows through the switch unit, the larger a gate voltage thereof in a negative side, the larger a conduction loss occurring when the reverse current flows. The power conversion apparatus is provided with a control unit that increases, when determined that the increase request for increasing the heating value is present, the gate voltage of the switch unit to the negative side when turned OFF compared to a case where no increase request for increasing the heating value is present, the reverse current flowing through the switch unit during the power transmission.
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公开(公告)号：US12143011B2
公开(公告)日：2024-11-12
申请号：US17734761
申请日：2022-05-02
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi , Syuji Kurauchi , Yuuichi Handa
Abstract: An electric power conversion apparatus has an input and output terminal, and a switch unit, and turns on and off the switch unit to transfer electric power from an electric storage unit connected to the input terminal to a power supply target connected to the output terminal. When reverse conduction current flows in the switch unit, it causes a larger conduction loss in an off state than an on state. The apparatus includes: a control unit that determines whether there is a request for increasing an amount of heat generation due to the electric power transfer, and when it is determined that there is the request, turns off the switch unit in which the reverse conduction current flows during the electric power transfer and, when it is determined that there is no request, turns on the switch unit in which the reverse conduction current flows during the electric power transfer.
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公开(公告)号：US11923756B2
公开(公告)日：2024-03-05
申请号：US17507938
申请日：2021-10-22
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi , Seiji Iyasu , Yuuichi Handa
CPC classification number: H02M1/0003 , H02M1/083 , H02M1/4233 , H02M7/1626
Abstract: A control apparatus for a power conversion apparatus acquires a detected voltage of an alternating-current power supply. The control apparatus determines a period from when the detected voltage exceeds a first determination value for determining a zero-up-crossing timing of an actual voltage of the alternating-current power supply until the detected voltage falls below a second determination value for determining a zero-down-crossing timing of the actual voltage to be a period during which the actual voltage has a positive polarity, and determines a period from when the detected voltage falls below the second determination value until the detected voltage exceeds the first determination value to be a period during which the actual voltage has a negative polarity. The first determination value is less than the detected voltage when the actual voltage is zero, and the second determination value is greater than the detected voltage when the actual voltage is zero.
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公开(公告)号：US10778130B2
公开(公告)日：2020-09-15
申请号：US16254346
申请日：2019-01-22
Applicant: DENSO CORPORATION
Inventor： Naoto Kobayashi
Abstract: In a control apparatus, an error correction outputting unit has correction information indicative of a relationship between values of an estimation error correction and corresponding values of at least one parameter correlating with an operating condition of a rotary electric machine. The error correction outputting unit outputs, in response to an input of a value of the at least one parameter, a value of the estimation error correction from the correction information. The value of the estimation error correction corresponds to the input value of the at least one parameter. A magnetic flux estimation corrector corrects, based on the value of the estimation error correction, an estimate of magnetic flux calculated by a magnetic flux estimator to thereby output a corrected magnetic flux estimate.
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