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公开(公告)号：US11606044B2
公开(公告)日：2023-03-14
申请号：US17038671
申请日：2020-09-30
申请人： KEIHIN CORPORATION
摘要： The present power conversion device includes an inverter, a step-up/down converter, a first capacitor, a second capacitor, a voltage sensor, a control device, and a backup power supply. The auxiliary device is connected between the first DC power supply and the step-up/down converter, and the control device includes an abnormality determination unit configured to determine that an abnormality has occurred when a control voltage is equal to or lower than a first threshold value, and a control unit configured to execute discharge control when the abnormality determination unit determines that the abnormality has occurred and an inter-terminal voltage measured by the voltage sensor is equal to or lower than a second threshold value.
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公开(公告)号：US11489458B2
公开(公告)日：2022-11-01
申请号：US17122079
申请日：2020-12-15
申请人： KEIHIN CORPORATION
发明人： Takami Suzuki
IPC分类号： H02M7/53 , H02M7/5387 , H02M1/00 , H02M1/084 , H02M3/158
摘要： This multi-phase converter control device performs PWM control on driving of a multi-phase converter. The multi-phase converter is configured such that a plurality of converters connected to each other in parallel have reactors, and the reactors are magnetically coupled with each other and step up an input voltage to generate a step-up voltage. This multi-phase converter control device includes a feedback control unit configured to perform feedback control such that the step-up voltage is a target voltage, a PWM control unit configured to generate a PWM signal on the basis of a voltage command value output from the feedback control unit, and a drive unit configured to drive the multi-phase converter on the basis of the PWM signal. The feedback control unit calculates a step-up ratio of the multi-phase converter and changes a control gain in the feedback control on the basis of the step-up ratio.
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公开(公告)号：US11319912B2
公开(公告)日：2022-05-03
申请号：US17110852
申请日：2020-12-03
申请人： KEIHIN CORPORATION
发明人： Atsushi Ogawa , Motoaki Kato , Kengo Nomura
IPC分类号： F02M51/06 , B60R16/033
摘要： An electromagnetic valve driver includes: an electric power feeder configured to apply a power voltage obtained by switching a battery voltage to one end of an electromagnetic coil of an electromagnetic valve; a detector configured to detect a drive current flowing through the electromagnetic coil; and a power supply configured to supply power to the detector. The electric power feeder adjusts the drive current by operating in a state in which the power voltage is applied to the electromagnetic coil on the basis of a detection value of the detector. The power supply supplies the power obtained by sampling and holding a reference power in a period excluding a switching period of the battery voltage in the electric power feeder to the detector.
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4.发明授权公开(公告)号：US11207994B2
公开(公告)日：2021-12-28
申请号：US17024052
申请日：2020-09-17
申请人： KEIHIN CORPORATION
发明人： Masashi Ueda
IPC分类号： B60L53/22 , B60L3/00 , B60R16/023 , H05K7/14 , H05K7/20
摘要： A mechano-electrical integrated power conversion device includes power drive unit and voltage converter that are housed within a single housing box and formed as a module. The box includes box body, upper lid member, and side lid member. The box body includes: a box body main portion disposed above a casing of an electric motor; and a box body remainder portion connected integrally to a side wall of the box body main portion and extending downwardly to a side of the casing. The upper lid member is mounted on the box body main portion, a first housing chamber being defined therebetween and housing the power drive unit. The side lid member is mounted on a side open end part of the box body remainder portion, a second housing chamber being defined between the box body remainder portion and the side lid member and housing the voltage converter.
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公开(公告)号：US11204390B2
公开(公告)日：2021-12-21
申请号：US16654570
申请日：2019-10-16
申请人： KEIHIN CORPORATION
IPC分类号： G01R31/00 , G01R31/3842 , H01M10/42 , H01M10/48
摘要： Provided is a battery monitoring circuit board on which a plurality of battery monitoring ICs that are electrically connected to a plurality of battery cells and monitor a state of each of the battery cells are mounted. The battery monitoring circuit board includes a first mounting region on which a current consumption element that is electrically connectable to the battery monitoring IC is mounted. The first mounting region is provided for each of the battery monitoring ICs.
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公开(公告)号：US20210301748A1
公开(公告)日：2021-09-30
申请号：US17130645
申请日：2020-12-22
申请人： KEIHIN CORPORATION
摘要： An electromagnetic valve drive device, that drives a fuel injection valve having a solenoid coil, includes a drive unit configured to drive the solenoid coil, an energization control unit configured to control energization for the solenoid coil by controlling the drive unit, a processing unit configured to obtain a current value arrival time, which is a time having elapsed from a start of energization for the solenoid coil until a current flowing through the solenoid coil reaches a predetermined current value, and an estimation unit configured to estimate a valve opening start time, which is a time from the start of the energization to a start of opening of the fuel injection valve on the basis of the current value arrival time.
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公开(公告)号：US11117438B2
公开(公告)日：2021-09-14
申请号：US16444062
申请日：2019-06-18
申请人： Keihin Corporation
发明人： Shingo Akiyama
IPC分类号： B60H1/00
摘要： A door actuating device includes a plurality of doors disposed in a flow channel for adjusting a degree of opening of the flow channel defined in an air conditioner case, the doors having respective door drive shafts, and a link unit actuating at least two of the doors. The link unit includes an actuator, a plate-like base member having two surfaces, a link mechanism having a plurality of levers mounted on at least either one of the two surfaces of the base member, and a rack member movably disposed on the base member and movable by a drive force transmitted from the actuator.
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公开(公告)号：US20210281195A1
公开(公告)日：2021-09-09
申请号：US17130860
申请日：2020-12-22
申请人： KEIHIN CORPORATION
IPC分类号： H02P5/74
摘要： The present motor control device includes an inverter, a converter, and a control device. The control device has a rotation speed calculation unit that calculates a rotation speed of a motor; an optimum voltage calculation unit that calculates an optimum input voltage; a minimum voltage calculation unit that calculates a minimum input voltage required to operate the motor at a motor operating point; and a target value setting unit that sets either one of the optimum input voltage and the minimum input voltage as a target input voltage. In a case in which the set target torque exceeds a predetermined value, the target value setting unit sets the minimum input voltage lower than the optimum input voltage as the target input voltage.
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公开(公告)号：US10907597B2
公开(公告)日：2021-02-02
申请号：US16364702
申请日：2019-03-26
申请人： KEIHIN CORPORATION
发明人： Yuya Ogane
摘要： This plunger pump includes a pressurization chamber that has a tubular inner circumferential wall and a plunger that has a substantially cylindrical outer circumferential surface. The inner circumferential wall has, in a part thereof in a circumferential direction about an axis of the plunger, a suction opening, which communicates with the pressurization chamber and is for introducing a fuel into the pressurization chamber. The inner circumferential wall is formed with an enlarged gap portion having a larger dimension than a dimension, at a position of the suction opening, from the outer circumferential surface of the plunger to an inner circumferential surface of the inner circumferential wall along a radial direction of the plunger, in at least a part of the inner circumferential wall at a position away from the position of the suction opening in the circumferential direction.
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公开(公告)号：US10608535B2
公开(公告)日：2020-03-31
申请号：US16447054
申请日：2019-06-20
申请人： KEIHIN CORPORATION
发明人： Takami Suzuki
摘要： A control device for a step-up converter which controls the step-up converter connected between a load and a DC power source, the control device includes a voltage control unit, a current command generation unit, a duty estimator, and a pole zero cancellation control unit. The voltage control unit performs a control arithmetic operation on the basis of a calculated value, obtained by performing a proportional arithmetic operation and an integration arithmetic operation on a difference between a voltage value on the load side and a voltage command value, and a value generated by the pole zero cancellation control unit. The current command generation unit generates a reactor current command value on the basis of an arithmetic result of the voltage control unit and a reciprocal of a duty estimation value.
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