公开(公告)号：US20200253093A1

公开(公告)日：2020-08-06

申请号：US16749304

申请日：2020-01-22

申请人： KEIHIN CORPORATION

发明人： Kazunari KUROKAWA ,  Tao Trong BUI ,  Kyo KYO ,  Takuma KODATO

IPC分类号： H05K7/20 ,  G01K7/01 ,  H02M7/537 ,  H02M3/155 ,  G01K15/00 ,  H02M1/088

摘要： A temperature detection device includes: first and second temperature sensors that output temperature signals that are signals corresponding to measured temperatures; a signal conversion circuit that respectively converts the temperature signals, which are output from the first and second temperature sensors, into pulse signals having duty ratios or frequencies corresponding thereto; a multiplexer that selectively outputs one of a plurality of the pulse signals converted by the signal conversion circuit; and an offset unit that offsets the temperature signal, which is output from the first temperature sensor of the first and second temperature sensors, to the signal conversion circuit.

公开(公告)号：US20210159799A1

公开(公告)日：2021-05-27

申请号：US17252399

申请日：2019-06-04

申请人： KEIHIN CORPORATION

发明人： Takami SUZUKI ,  Yuta NAKAMURA ,  Kazunari KUROKAWA ,  Takuma KATO

IPC分类号： H02M3/158 ,  H02M3/335

摘要： A power conversion device having a multi-phase converter in which a plurality of chopper circuits each including a switching element and a reactor connected to the switching element are connected in parallel is provided. The power conversion device includes a single current sensor that is provided on a primary side of the chopper circuit, and detects a phase current flowing through each of the reactors when the switching elements are in both an on state and an off state, and a drift current detection unit configured to detect a drift current of a phase current in the multi-phase converter on the basis of the phase current detected by the current sensor, wherein the current sensor detects a phase current such that directions of phase currents flowing through each of the reactors are the same as each other

公开(公告)号：US20210091651A1

公开(公告)日：2021-03-25

申请号：US17022758

申请日：2020-09-16

申请人： KEIHIN CORPORATION

发明人： Kazunari KUROKAWA ,  Yuzuru TAKASHIMA ,  Kenichi TAKEBAYASHI ,  Kenichi NONAKA

IPC分类号： H02M1/00

摘要： This power conversion device includes a power module that has a plurality of power devices, and a circuit board that is connected to the power module, in which the circuit board has a drive circuit arrangement area in which a plurality of drive circuits for driving the plurality of power devices are disposed and a control circuit arrangement area in which a control circuit for controlling the drive circuit is disposed, and two drive circuit arrangement areas are provided with the control circuit arrangement area interposed therebetween.

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

发明人： Shogo TOKITA ,  Kazunari KUROKAWA ,  Masahiro SHIMADA ,  Yuta NAKAMURA ,  Takami SUZUKI

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.

公开(公告)号：US20190260293A1

公开(公告)日：2019-08-22

申请号：US16229181

申请日：2018-12-21

申请人： KEIHIN CORPORATION

发明人： Kazunari KUROKAWA ,  Takuma KATO ,  Takayuki SASANUMA ,  Takeshi KOBAYASHI ,  Yuta NAKAMURA

IPC分类号： H02M3/158 ,  H02M1/00 ,  H02M7/00

摘要： A power conversion device includes a multiphase power conversion circuit, a plurality of bus bars which are arranged adjacent to each other, phase currents of the multiphase power conversion circuit flowing through the plurality of bus bars, respectively, a single current sensor configured to detect any of the phase currents in the plurality of bus bars, and a housing which houses the multiphase power conversion circuit, the plurality of bus bars and the current sensor, in which the current sensor includes a magnetic core through which the plurality of bus bars are inserted such that flow directions of the phase currents are the same direction, and which has a single magnetic gap, and a Hall element inserted in the magnetic gap.