公开(公告)号：US20180278027A1

公开(公告)日：2018-09-27

申请号：US15710899

申请日：2017-09-21

Applicant: Mitsubishi Electric Corporation

Inventor： Yasuyuki SHIMIZU ,  Takaaki TANAKA ,  Akira NAKAGAWA

IPC: H01T13/41 ,  H01T13/44 ,  H01T13/06 ,  H01T13/08

CPC classification number: H01T13/41 ,  F02P3/01 ,  H01T13/06 ,  H01T13/08 ,  H01T13/44

Abstract: By grounding a metal first housing, radiation noise generated from the coupling circuit is shielded. Further, by enclosing the first housing in a metal second housing in a manner such that the first housing and the second housing do not come into contact with each other, and grounding the second housing by connecting the second housing to an engine block, radiation noise generated by the capacitive component between the coupling circuit and the first housing is shielded by the second housing. As a result, the influence of this noise on peripheral devices of the high frequency discharge ignition device can be suppressed.

公开(公告)号：US20250012833A1

公开(公告)日：2025-01-09

申请号：US18710973

申请日：2021-11-26

Applicant: Mitsubishi Electric Corporation

Inventor： Satoshi MURAKAMI ,  Akira NAKAGAWA ,  Masatoshi SAITO ,  Takashi NAGAO ,  Toshiki NAGARE

IPC: G01R19/10 ,  G01R15/16 ,  H02M1/00 ,  H02M7/537 ,  H03F3/45

Abstract: A detection circuit includes: a differential; a plus-side detection wire connected between a plus input terminal of the differential amplifier and a detector; a minus-side detection wire connected between a minus input terminal of the differential amplifier and the detector; a first detection wire connected in parallel to the plus-side detection wire between the detector and the plus input terminal of the differential amplifier; and a second detection wire connected in parallel to the minus-side detection wire between the detector and the minus input terminal of the differential amplifier. The first detection wire and the second detection wire are arranged in the electric circuit so as to, by induced voltages generated due to electromagnetic noise, cancel out induced voltages generated on the plus-side detection wire and the minus-side detection wire due to the electromagnetic noise.

公开(公告)号：US20230019205A1

公开(公告)日：2023-01-19

申请号：US17783000

申请日：2020-01-15

Applicant: Mitsubishi Electric Corporation

Inventor： Satoshi MURAKAMI ,  Yoshihiro TAKESHIMA ,  Yoshiaki ISHIGURO ,  Akira NAKAGAWA ,  Ryota KONDO

IPC: H02P27/06 ,  H02M7/483 ,  H02M1/00 ,  H02M7/537

Abstract: A power conversion device and a motor system according to the present disclosure comprises an inverter circuit which is connected to a motor, a switch circuit, and a control circuit. The power conversion device and the motor system are characterized in that the inverter circuit and the switch circuit are capable of two-level operation and three-level operation, and the control circuit switches between the two-level operation and the three-level operation on the basis of the motor torque command and the rotational speed command. As a result, it is possible to reduce the total loss in the power conversion device and the motor.

公开(公告)号：US20220407446A1

公开(公告)日：2022-12-22

申请号：US17772145

申请日：2020-01-21

Applicant: Mitsubishi Electric Corporation

Inventor： Satoshi MURAKAMI ,  Yoshihiro TAKESHIMA ,  Yoshiaki ISHIGURO ,  Akira NAKAGAWA ,  Ryota KONDO

IPC: H02P27/06 ,  H02M7/5387 ,  H02K11/33

Abstract: An inverter is provided for driving a motor. A first capacitor, and a second capacitor including capacitors connected in series, are connected in parallel to a DC power supply. A switch circuit having switching elements is connected between the inverter and the second capacitor. A control circuit is provided for controlling the inverter and the switch circuit. The control circuit performs control to switch the switch circuit so as to supply current from the second capacitor to the inverter during 3-level operation, and supply current from both of the first capacitor and the second capacitor to the inverter during 2-level operation.

公开(公告)号：US20190078520A1

公开(公告)日：2019-03-14

申请号：US15765632

申请日：2015-12-03

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Takahiro INOUE ,  Taichiro TAMIDA ,  Takashi HASHIMOTO ,  Noboru WADA ,  Akira NAKAGAWA ,  Tomokazu SAKASHITA ,  Tetsuya HONDA

IPC: F02D19/12 ,  F02D41/00 ,  F02D41/04 ,  F02D41/10 ,  F02M25/10

CPC classification number: F02D19/12 ,  F02D41/0002 ,  F02D41/0025 ,  F02D41/045 ,  F02D41/10 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/0418 ,  F02D2200/1002 ,  F02D2250/21 ,  F02M25/10 ,  Y02T10/42

Abstract: A change amount per unit time of an engine output command for controlling engine output of an internal combustion engine is calculated as an engine output increasing rate, and a power supply device is controlled so that power corresponding to the calculated engine output increasing rate is supplied to a combustion promoter generation device. The combustion promoter generation device generates a combustion promoter through the power supplied from the power supply device to supply the combustion promoter to a combustion chamber of the internal combustion engine, and a generation amount of the combustion promoter increases as the supplied power increases. In this manner, the generation amount of the combustion promoter is adjusted.

公开(公告)号：US20190199241A1

公开(公告)日：2019-06-27

申请号：US16310231

申请日：2017-02-28

Applicant: Mitsubishi Electric Corporation

Inventor： Satoshi MURAKAMI ,  Ryosuke KOBAYASHI ,  Akira NAKAGAWA ,  Kimihiko TANAYA ,  Yusuke NARUSE ,  Yuichi MURAMOTO

IPC: H02M7/5387 ,  F02P3/01 ,  F02P23/04 ,  H02M1/34

CPC classification number: H02M7/53871 ,  F02P3/01 ,  F02P23/04 ,  H02M1/34 ,  H02M7/48 ,  H02M2001/0006 ,  H02M2001/0058 ,  Y02B70/1491

Abstract: A resonant inverter includes: an input capacitor; an inverter; a snubber circuit; a transformer having a primary winding connected to an AC end of the inverter; a resonant coil, a resonant capacitor, and a current sensor on the secondary winding side of the transformer; and a control unit, wherein, on the basis of current detected by the current sensor, the control unit controls switching elements so as to perform zero voltage switching at the time of turning-on, at a frequency at which a load including the resonant coil and the resonant capacitor becomes capacitive, and performs power regeneration of energy stored in a snubber capacitor to a DC voltage source.

公开(公告)号：US20180301877A1

公开(公告)日：2018-10-18

申请号：US15769120

申请日：2016-10-07

Applicant: Mitsubishi Electric Corporation ,  NGK SPARK PLUG CO., LTD.

Inventor： Taichiro TAMIDA ,  Takahiro INOUE ,  Takashi HASHIMOTO ,  Akira NAKAGAWA ,  Tomokazu SAKASHITA ,  Takayoshi NAGAI ,  Kimihiko TANAYA ,  Hiroyuki KAMEDA ,  Yuichi YAMADA ,  Kenji BAN

IPC: H01T13/32 ,  F02B23/08 ,  F02P13/00 ,  F02P5/145 ,  F02P3/01

CPC classification number: H01T13/32 ,  F02B23/08 ,  F02P3/01 ,  F02P5/145 ,  F02P13/00 ,  F02P15/10 ,  F02P23/04 ,  H01T13/34 ,  H01T13/467 ,  H01T13/50 ,  H01T13/52 ,  H01T13/54 ,  H01T19/04 ,  H05H1/2406 ,  H05H2001/2412 ,  H05H2001/2418

Abstract: In an ignition plug, since a ground electrode is formed in a thin-rod-shape or a mesh-like shape, sufficiently strong radicals are locally generated by a barrier discharge, an anti-inflammation effect by the electrode is small, and the growth of a flame is hardly hindered. Furthermore, by making the thickness dimension of a second dielectric facing a discharge region uniform, the barrier discharge is spread over the surface of the second dielectric, the generation of the radicals is maintained, and combustibility after ignition is promoted. Furthermore, because an end portion of a high voltage electrode and a ground electrode are disposed to face each other within a combustion chamber, a fuel gas introduced into the combustion chamber is liable to flow into the discharge region, and is easily ignited by the radicals generated due to the discharge.