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公开(公告)号：US11831302B2
公开(公告)日：2023-11-28
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
CPC classification number: H03K17/04206 , H02M1/0009 , H02M1/08 , 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：US11368065B2
公开(公告)日：2022-06-21
申请号：US16668465
申请日：2019-10-30
Applicant: DENSO CORPORATION
Inventor： Yasuaki Aoki
Abstract: A controller of a rotating electric machine performs a control on a control amount of the rotating electric machine by (a) calculating a voltage instruction value for controlling the control amount based on voltage detection values of the shunt resistors when shunt resistors in at least two phases have an electric current flowing therein, and (b) performing a drive control of each of switches in an inverter based on the calculated voltage instruction value. The controller determines whether a phase current flowing in a winding is detectable in at least two of three phases based on voltage values of the shunt resistors, and, when determining that the phase current is not detectable in the at least two phases, the controller performs the drive control based on a past current value or a past voltage value in a two-phase rotating coordinate system of the rotating electric machine.
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公开(公告)号：US11342877B2
公开(公告)日：2022-05-24
申请号：US16662367
申请日：2019-10-24
Applicant: DENSO CORPORATION
Inventor： Yasuaki Aoki
IPC: H02K11/00 , H02P27/08 , H02P6/16 , H02P6/06 , H02M7/5395 , G01R19/00 , B62D5/04 , H02P25/092
Abstract: A controller of a rotating electric machine includes a current detector detecting a voltage of each of shunt resistors in at least two phases from among the shunt resistors in three phases during an electric current flowing period in which the shunt resistors in the at least two phases have an electric current flowing therein; and a signal generator setting a switching mode of each of switches forming an inverter for controlling an estimated angular velocity to an instruction angular velocity based on the detected voltage. The signal generator sets a switching mode to flow the electric current in the shunt resistors in the at least two phases during at least part of one half of a modulation cycle of control of the estimated angular velocity.
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公开(公告)号：US10892698B2
公开(公告)日：2021-01-12
申请号：US15394165
申请日：2016-12-29
Applicant: DENSO CORPORATION
Inventor： Yasuaki Aoki , Yosuke Matsuki , Hideji Yoshida
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：US11750086B2
公开(公告)日：2023-09-05
申请号：US17547840
申请日：2021-12-10
Applicant: DENSO CORPORATION
Inventor： Yasuaki Aoki , Tomohiro Nezuka , Akimasa Niwa
CPC classification number: H02M1/385 , H02M1/08 , H02M7/53871 , H03K17/165 , H02M1/0054 , H02P27/06 , H03K2217/0063 , H03K2217/0072
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：US10770998B2
公开(公告)日：2020-09-08
申请号：US15978297
申请日：2018-05-14
Applicant: DENSO CORPORATION
Inventor： Yasuaki Aoki , Shinji Makita
IPC: H02P21/22 , H02M7/483 , H02M7/5387 , H02M1/15
Abstract: A control apparatus for is a rotating electric machine applied to a control system including a power conversion circuit, a rotating electric machine, and a capacitor. The control apparatus selects two types of active voltage vectors that sandwich a command voltage vector that is applied to a rotating electric machine from a power conversion circuit and have a phase difference of 60 degrees therebetween. The control apparatus selects, of two types of active voltage vectors that sandwich the command voltage vector and have a phase difference of 120 degrees therebetween, one of two types of active voltage vectors that differs from the two types of active voltage vectors selected earlier, based on a driving state of the rotating electric machine. The control apparatus controls the power conversion apparatus to perform switching operations to control the rotating electric machine, based on the selected three types of active voltage vectors.
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公开(公告)号：US10432124B2
公开(公告)日：2019-10-01
申请号：US16170533
申请日：2018-10-25
Applicant: DENSO CORPORATION
Inventor： Yasuaki Aoki
IPC: H02P21/00 , H02P21/22 , H02P21/16 , G01R19/04 , H02M1/08 , H02M7/5387 , H02P27/12 , H02P27/08 , H02M1/00 , H02M7/5395
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：US12132395B2
公开(公告)日：2024-10-29
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：US11946956B2
公开(公告)日：2024-04-02
申请号：US17545033
申请日：2021-12-08
Applicant: DENSO CORPORATION
Inventor： Takasuke Itou , Tomohiro Nezuka , Yasuaki Aoki , Yuuta Nakamura , Takashi Yoshiya
IPC: G01R19/165 , H03F3/04 , H03K5/24
CPC classification number: G01R19/165 , H03F3/04 , H03K5/24
Abstract: A signal detection circuit detects, as a detection target signal, a signal of a main terminal of a switching element by comparing the detection target signal with a reference signal. The signal detection circuit includes: a signal generation unit generating the reference signal; a first capacitor having a first terminal connected with the main terminal of the switching element; a second capacitor having a first terminal connected with an output terminal of the signal generation unit; and a detection circuit receiving, as input signals, a signal output from a second terminal of the first capacitor and a signal output from a second terminal of the second capacitor, and the detection circuit detecting the detection target signal based on the input signals.
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公开(公告)号：US11784612B2
公开(公告)日：2023-10-10
申请号：US17545035
申请日：2021-12-08
Applicant: DENSO CORPORATION
Inventor： Takasuke Itou , Tomohiro Nezuka , Yasuaki Aoki , Yuuta Nakamura , Takashi Yoshiya
CPC classification number: H03F3/005 , G11C27/024 , H03F3/45
Abstract: A signal detection circuit includes: a first capacitor having a first terminal connected with a first main terminal of a switching element; a second capacitor having a first terminal connected with a second main terminal of the switching element; and a detection circuit having a differential circuit configuration. The detection circuit receives, as input signals, a signal from a second terminal of the first capacitor and a signal from a second terminal of the second capacitor, detects detection target signals based on the input signals. The detection target signals include a signal of the first main terminal of the switching element and a signal of the second main terminal of the switching element.
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