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公开(公告)号：US20240154561A1
公开(公告)日：2024-05-09
申请号：US18403021
申请日：2024-01-03
Applicant: DENSO CORPORATION
Inventor： Harumi HORIHATA , Yasuaki AOKI , Takahiro WATANABE
IPC: H02P27/08 , H02P25/022 , H02P101/45
CPC classification number: H02P27/08 , H02P25/022 , H02P2101/45
Abstract: An inverter control device is for a vehicle including: a rotating electric machine that is an in-wheel motor integrated inside a drive wheel and includes a rotor including a magnet portion with a plurality of magnetic poles and a stator including multiphase stator windings without teeth protruding radially toward the rotor; and an inverter electrically connected to the rotating electric machine. The inverter control device includes: a control unit configured to perform PWM control to generate a drive signal for a switching element in the inverter based on a carrier signal and a command voltage in each phase in the overall operating region for an operating point defined by the rotation speed and the torque of the rotating electric machine; and an operation unit configured to operate the switching element based on the generated drive signal.
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公开(公告)号：US20220190710A1
公开(公告)日：2022-06-16
申请号：US17685456
申请日：2022-03-03
Applicant: DENSO CORPORATION
Inventor： Kousuke KONDOU , Yasuaki AOKI
Abstract: A rotating electrical machine control device is applied to a system including a power conversion circuit electrically connected to a rotating electrical machine, and a capacitor electrically connected to an input side of the power conversion circuit. The rotating electrical machine control device includes a determination unit that determines a switching mode of the power conversion circuit in which a ripple current flowing through the capacitor is reflected, based on an operating area of the rotating electrical machine, and an operation unit that operates the power conversion circuit such that the switching mode of the power conversion circuit is the switching mode determined by the determination unit.
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公开(公告)号：US20220109438A1
公开(公告)日：2022-04-07
申请号：US17550887
申请日：2021-12-14
Applicant: DENSO CORPORATION
Inventor： Yuuta NAKAMURA , Yasuaki AOKI , Hideji YOSHIDA , Takashi YOSHIYA , Tomohiro NEZUKA , Akimasa NIWA
IPC: H03K17/042 , H02M1/08 , H02M1/00 , H02M7/537 , H03K17/687
Abstract: A drive circuit drives a switch configuring a power converter. The drive circuit divides an inter-terminal voltage of a switch. The drive circuit includes a differential circuit having first and second input terminals to which the divided inter-terminal voltages are inputted. The differential circuit outputs an analog voltage based on a voltage difference between the input terminals. The differential circuit executes reset of the output voltage, and with the voltage difference when reset is canceled after reset is executed as a reference voltage, outputs an analog voltage in which an amount of change from the reference voltage is multiplied by an amplification factor. The drive circuit outputs a binary signal based on comparison results between a threshold and the analog voltage outputted from the differential circuit, and sets a transfer rate of a gate charge of the switch when a driving state is switched, based on the output signal thereof.
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公开(公告)号：US20240204702A1
公开(公告)日：2024-06-20
申请号：US18594249
申请日：2024-03-04
Applicant: DENSO CORPORATION
Inventor： Yoshihiro NAKASHIMA , Yasuaki AOKI
Abstract: A control apparatus of a rotating electric machine is applicable to a control system that includes: a plurality of power conversion circuits that convert direct-current power from a direct-current power supply to alternating-current power and output the alternating-current power by switching operations; rotating electric machines that are provided in correspondence to the power conversion circuits and supplied with the alternating-current power outputted from the power conversion circuits; and a capacitor that is connected in parallel to the direct-current power supply, provided on an input side of the power conversion circuits, and common to the power conversion circuits. The control apparatus includes: an adjusting unit that performs an adjustment process in which output modes of voltage vectors to the rotating electric machines are adjusted and an operating unit that performs the switching operations of the power conversion circuits to output the voltage vectors adjusted by the adjusting unit.
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公开(公告)号：US20220103061A1
公开(公告)日：2022-03-31
申请号：US17547840
申请日：2021-12-10
Applicant: DENSO CORPORATION
Inventor： Yasuaki AOKI , Tomohiro NEZUKA , Akimasa NIWA
Abstract: In a drive circuit, a differential circuit unit is configured such that resetting of an output voltage of the differential circuit unit is carried out, and the resetting of the output voltage of the differential circuit unit is cancelled. A value of the difference between first and second divided terminal voltages at a timing of cancelling the resetting is defined as a reference voltage. The differential circuit unit generates, as the output voltage, a product of a voltage change from a reference voltage and a predetermined amplification factor after cancelling of the resetting of the differential circuit unit. A signal generator generates a gate signal for the upper- and lower-arm switches in accordance with a value of the output voltage of the differential circuit unit while the upper- and lower-arm switches are in an off state.
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Patent Agency Ranking
公开(公告)号：US20190131904A1
公开(公告)日：2019-05-02
申请号：US16170533
申请日：2018-10-25
Applicant: DENSO CORPORATION
Inventor： Yasuaki AOKI
CPC classification number: H02P21/22 , G01R19/04 , H02M1/08 , H02M7/53871 , H02M7/5395 , H02M2001/0009 , H02P21/16 , H02P27/08 , H02P27/12
Abstract: In a current detection apparatus, a corrector obtains first current-value pairs of the plural values of the corrective first phase current and the respective plural values of the corrective first phase bus-based current synchronized with the plural values of the corrective first phase current. The corrector obtains second current-value pairs of the plural values of the corrective second phase current and the respective plural values of the corrective second phase bus-based current synchronized with the plural pairs of the corrective second phase current. The corrector corrects at least target first and second phase currents detected by a first current detector based on the obtained first current-value pairs and the second current-value pairs to thereby align amplitudes of the respective target first and second phase currents with each other.
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公开(公告)号：US20170201201A1
公开(公告)日：2017-07-13
申请号：US15394165
申请日：2016-12-29
Applicant: DENSO CORPORATION
Inventor： Yasuaki AOKI , Yosuke MATSUKI , Hideji YOSHIDA
CPC classification number: H02P21/22 , G01R1/203 , G01R19/0092 , H02P6/16 , H02P21/14 , H02P21/34 , H02P27/08 , H02P29/60 , H02P2205/01 , H02P2207/05
Abstract: In a current detection apparatus, an arm current detection unit detects each of at least first and second phase currents having respective amplitudes and flowing in a multiphase rotary electric machine based on a potential difference between input and output terminals of the corresponding one of first and second detection switches during the corresponding one of the first and second detection switches being on. A bus current detection unit detects each of at least bus-based first and second phase currents corresponding to the first and second phases of the multiphase rotary electric machine based on a current flowing through one of first and second buses. An amplitude correction unit corrects the first and second phase currents based on the bus-based first and second phase currents such that the amplitudes of the respective first and second phase currents match with each other.
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公开(公告)号：US20130272046A1
公开(公告)日：2013-10-17
申请号：US13846462
申请日：2013-03-18
Applicant: DENSO CORPORATION
Inventor： Tetsuya MATSUOKA , Hiroyoshi SAWADA , Makoto OKAMURA , Hiroshi INAMURA , Yasuaki AOKI
IPC: H02M7/5387
CPC classification number: H02M7/5387 , H01L24/33 , H01L2924/13055 , H02M7/003 , H01L2924/00
Abstract: The power conversion device includes a plurality of semiconductor modules, each having a main body section including a switching element therein. In a module unit, a positive module and a negative module are disposed such that main surfaces of the respective main body sections oppose each other. A positive terminal, a first intermediate terminal, a negative terminal, and a second intermediate terminal project in a Z direction perpendicular to X direction in which the positive module and the negative module oppose each other. A first vector V1 from the positive terminal towards the first intermediate terminal and a second vector V2 from the second intermediate terminal towards the negative terminal are configured such that these vector components V12 and V22 in a Y direction perpendicular are opposite to each other.
Abstract translation: 电力转换装置包括多个半导体模块，每个半导体模块具有包括开关元件的主体部分。 在模块单元中，设置正模块和负模块，使得各个主体区段的主表面彼此相对。 正极端子，第一中间端子，负极端子和第二中间端子在与正方形模块和负极模块相对的X方向垂直的Z方向上突出。 从正端子朝向第一中间端子的第一矢量V1和从第二中间端子向负极端子的第二矢量V2被配置为使得这些矢量分量V12和V22在Y方向垂直的方向彼此相反。
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公开(公告)号：US20250015720A1
公开(公告)日：2025-01-09
申请号：US18897541
申请日：2024-09-26
Applicant: DENSO CORPORATION
Inventor： Kenji TOMITA , Yasuaki AOKI , Yusuke UEDA , Takahiro SHIMIZU , Nobuyuki KITAMURA
IPC: H02M3/158
Abstract: A control apparatus for a DC-to-DC converter includes a switching controller working to selectively perform a first control task and a second control task. The first control task is to control on-off operations of switching devices of the DC-to-DC converter not to have at least one of an all-on period and an all-off period. The all-on period being a period of time in which all the switching devices are turned on. The all-off period is a period of time in which all the switching devices are turned off. The second control task is to control the on-off operations of the switching devices to have both the all-on period and the all-off period. The switching controller works to change the first control task to the second control task before a current mode is switched from a continuous current mode to a discontinuous current mode.
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10.发明公开公开(公告)号：US20240195337A1
公开(公告)日：2024-06-13
申请号：US18581684
申请日：2024-02-20
Applicant: DENSO CORPORATION
Inventor： Kazuki KOMIYA , Yasuaki AOKI
CPC classification number: H02P23/14 , H02P5/46 , H02P21/141 , H02P21/22 , H02P27/06
Abstract: A current measurement apparatus includes a corrector. The corrector calculates an error arising in a measured value of at least one target phase current due to magnetic flux generated from each of multiphase power lines in accordance with an error factor defined for each multiphase power line with respect to the at least one target phase current. The error factor defined for each multiphase power line with respect to the at least one target phase current is a constant value or a variable determined based on (i) one or more shields located between the current sensor and the corresponding multiphase power line and (ii) a distance between the current sensor and the corresponding multiphase power line. The corrector corrects the measured value of the at least one target phase current based on the calculated error.
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