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.

公开(公告)号：US20220259008A1

公开(公告)日：2022-08-18

申请号：US17619251

申请日：2019-07-19

Applicant: Mitsubishi Electric Corporation

Inventor： Mariko NAKAGAWA ,  Tomokazu SAKASHITA ,  Miyuki TAKESHITA ,  Hidehito YOSHIDA ,  Hirohisa KUWANO ,  Takuya MIURA

IPC: B66B1/34 ,  H02J7/00 ,  H02J50/40 ,  H02J50/10

Abstract: A wireless power supply system for elevators includes a power transmitting device, first and second power receiving devices provided in the first and second elevator cars respectively, and a control device. The power transmitting device includes power transmitting units each having an inverter and two power transmitter coils. The first power receiving device includes first power receiving units each having a rectifier circuit and a power receiver coil that can be coupled with one of the two power transmitter coils. The second power receiving device includes second power receiving units each having a rectifier circuit and a power receiver coil that can be coupled with the other of the two power transmitter coils. The power transmitting device, or the first and second power receiving devices include switches to disconnect the inverter and the first load device as well as the inverter and the second load device.

公开(公告)号：US20210313870A1

公开(公告)日：2021-10-07

申请号：US17257868

申请日：2019-05-14

Applicant: Mitsubishi Electric Corporation

Inventor： Hiroyasu IWABUKI ,  Tomokazu SAKASHITA ,  Ryota KONDO ,  Takaaki TAKAHARA ,  Hiroto MIZUTANI ,  Takuya NAKANISHI ,  Yusuke HIGAKI

IPC: H02M1/00 ,  H02J50/10 ,  H02M3/335 ,  H02M7/219 ,  B60L53/22

Abstract: An output terminal of a contact type charger connected to an AC power supply 1 and being for boosting or stepping down an input voltage, and an output terminal of a non-contact type charger for receiving power in a non-contact manner are connected to an input terminal of a DC/DC converter via an integrated bus, a DC link capacitor is connected between an AC/DC converter and an isolated DC/DC converter included in the contact type charger, an integrated capacitor is connected to the integrated bus, and a control circuit adjusts a DC voltage of the DC link capacitor or the integrated capacitor such that at least one of power losses or a total power loss of the contact type charger, the non-contact type charger, and the DC/DC converter is reduced.

公开(公告)号：US20190288605A1

公开(公告)日：2019-09-19

申请号：US16347346

申请日：2016-12-19

Applicant: Mitsubishi Electric Corporation

Inventor： Hiroyuki OSUGA ,  Takayuki HIDAKA ,  Takashi MIYAMOTO ,  Tomokazu SAKASHITA ,  Satoshi OJIKA

IPC: H02M3/335 ,  H02M1/32

Abstract: A power conversion apparatus (10) includes a plurality of power conversion units (12) each having a function of converting an input direct current voltage to a different direct current voltage, and a control unit (15) that controls the plurality of power conversion units (12) in accordance with a target value Vaim for the sum of voltages output from the plurality of power conversion units (12). When making one or more of the power conversion units (12) output a first voltage which is fixed and making a different one of the power conversion units (12) output a second voltage which is adjusted in accordance with the target value Vaim, the control unit (15) repeatedly switches a power conversion unit (12) to output the second voltage at least between two of the power conversion units (12).

公开(公告)号：US20240055898A1

公开(公告)日：2024-02-15

申请号：US18267100

申请日：2021-02-05

Applicant: Mitsubishi Electric Corporation

Inventor： Hidehito YOSHIDA ,  Tomokazu SAKASHITA

IPC: H02J50/12 ,  H02J50/40 ,  H02J50/70

CPC classification number: H02J50/12 ,  H02J50/40 ,  H02J50/70

Abstract: A power receiving device and a wireless power transfer system including the same for non-contact power transfer to a plurality of mobile bodies are obtained, which allow stable power transfer even when the number of power transfer targets varies. In the wireless power transfer system, electric power is transmitted from a power transmitting source in a power transmitting device to generate a high frequency voltage and a power-transmitting resonant circuit with a power transmitting coil to generate an AC magnetic flux by resonance when receiving the high frequency voltage. A power-receiving resonant circuit receives the AC magnetic flux transmitted from the power-transmitting resonant circuit and converts the AC magnetic flux into AC power. At least one compensation element cancels out a variation of an inductance of the power transmitting coil attributable to the movement of the power-receiving resonant circuit to a position where electric power can be received.

公开(公告)号：US20220416563A1

公开(公告)日：2022-12-29

申请号：US17793934

申请日：2020-03-30

Applicant: Mitsubishi Electric Corporation

Inventor： Mariko NAKAGAWA ,  Tomokazu SAKASHITA ,  Miyuki TAKESHITA ,  Hidehito YOSHIDA ,  Hirohisa KUWANO ,  Takuya MIURA

IPC: H02J7/34 ,  H02J7/00 ,  B66B1/34

Abstract: An elevator includes: a car moving in a hoistway; a load provided to the car; a first power storage unit, composed of one battery capable of charging and discharging, connected to the load, and supplying power to the load; a second power storage unit, composed of one or more batteries capable of charging and discharging, and connected to the load; a power transmission circuit and capable of transmitting power between the first power storage unit and the second power storage unit; and a control unit controlling the power transmission circuit to supply power from the second power storage unit to the first power storage unit, when it is determined that a remaining stored power amount of the battery constituting the first power storage unit is less than an amount of power required for driving the load for a certain period of time.

公开(公告)号：US20220376553A1

公开(公告)日：2022-11-24

申请号：US17773616

申请日：2019-12-26

Applicant: Mitsubishi Electric Corporation

Inventor： Hidehito YOSHIDA ,  Tomokazu SAKASHITA ,  Takuya NAKANISHI

IPC: H02J50/12 ,  H02M1/08 ,  H02M7/217 ,  H02M1/00

Abstract: A power receiving device of a wireless power transfer system receives power from a power transmitting circuit connected to a power source and having a power transmitting coil. The power receiving device includes a power receiving circuit, a power converter, an LC filter, and switches which are controlled by a control device on the basis of voltage detected by voltage detection means for detecting output voltage of the power receiving circuit, so that conduction between the power receiving circuit and the power converter is interrupted during a non-power-transfer period.

公开(公告)号：US20220329159A1

公开(公告)日：2022-10-13

申请号：US17642704

申请日：2019-11-21

Applicant: Mitsubishi Electric Corporation

Inventor： Hiroyuki YOSHINO ,  Tomokazu SAKASHITA

IPC: H02M3/158

Abstract: A DC/DC converter includes N converters connected in parallel and each having an inductor, a switching element, and a reverse-flow preventing element. Each converter is controlled at phases different from each other and such that a sum of switching frequencies F is out of a first non-selected frequency band. The inductor has an inductance that decreases as the switching frequency F increases. The switching element is controlled using the switching frequency F higher than a second non-selected frequency band of which upper and lower limit frequencies are 1/N of upper and lower limit frequencies of the first non-selected frequency band, and has a total gate charge such that a total loss is smaller than that in a case where the switching frequency F is set to be lower than the second non-selected frequency band.

公开(公告)号：US20200271084A1

公开(公告)日：2020-08-27

申请号：US16646151

申请日：2018-05-24

Applicant: Mitsubishi Electric Corporation

Inventor： Takahiro INOUE ,  Taichiro TAMIDA ,  Ryota ASAKURA ,  Tomokazu SAKASHITA ,  Takashi HASHIMOTO

IPC: F02P9/00 ,  F02P17/12

Abstract: An ignition device according to the present invention includes: an ignition plug, which includes a first electrode, a second electrode, and a dielectric body arranged between the electrodes; an AC power supply configured to generate an AC voltage to be applied between the electrodes; a thermal plasma detection portion configured to output a thermal plasma occurrence signal when thermal plasma has occurred between the electrodes; and an application time period determination portion configured to determine an application time period for the AC voltage during one cycle of the internal combustion engine in advance before the application, and when the thermal plasma occurrence signal is received while the AC voltage is being applied based on the application time period, change the application time period so as to shorten the application time period.

公开(公告)号：US20240258828A1

公开(公告)日：2024-08-01

申请号：US18564629

申请日：2021-07-16

Applicant: Mitsubishi Electric Corporation

Inventor： Hidehito YOSHIDA ,  Tomokazu SAKASHITA

IPC: H02J50/10 ,  H02J50/40

CPC classification number: H02J50/10 ,  H02J50/40 ,  H02J2310/40

Abstract: A power reception coil of a non-contact power supply device includes a plurality of power reception coil windings arranged along a movement direction of a moving object, and the adjacent power reception coil windings are disposed so as to partially overlap each other. Accordingly, even if a power transmission coil is positioned at a boundary between the power reception coil windings, power supply performance does not decrease. In addition, one power reception coil winding is not opposed to two power transmission coils at a time, and thus a cancellation phenomenon of magnetic fields can be prevented and power can be stably supplied.