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公开(公告)号：US20240074017A1
公开(公告)日：2024-02-29
申请号：US18269986
申请日：2021-01-22
Applicant: Mitsubishi Electric Corporation
Inventor： Hiroyuki YOSHINO , Tomokazu SAKASHITA
Abstract: At least one light source unit includes light sources which are series connected, switches which are each connected in parallel with each of the light sources, a light source drive circuit which supplies a current to a structure including the light sources and the switches, and switch control means which carries out on and off control of the switches. Based on light source control information, the light source unit carries out light dimming control of the light sources by performing on and off of the switches, according to a light turned on duty ratio. In addition, each of the light sources is sequentially light turned on from the one with a larger light on duty ratio, and in addition, each of the light sources is sequentially light turned off from the one with a smaller light on duty ratio source.
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公开(公告)号：US20210249965A1
公开(公告)日：2021-08-12
申请号：US17049583
申请日：2018-06-14
Applicant: Mitsubishi Electric Corporation
Inventor： Satoshi OJIKA , Tomokazu SAKASHITA
Abstract: The DC/DC converter circuit includes: a primary-side circuit configured to convert DC power from a DC power source into a pulse voltage; an isolation transformer configured to transform the pulse voltage while isolating the pulse voltage; a secondary-side circuit connectable in a switching manner by a switching circuit to one of a rectifier circuit for a high-voltage low-current output mode or a current doubler circuit for a low-voltage high-current output mode; and a control circuit configured to perform connection switching control of the switching circuit so as to establish, depending on target supply power, connection to the rectifier circuit in the high-voltage low-current output mode, and connection to the current doubler circuit in the low-voltage high-current output mode.
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公开(公告)号：US20200274399A1
公开(公告)日：2020-08-27
申请号：US16487153
申请日：2017-12-15
Applicant: Mitsubishi Electric Corporation
Inventor： Takuya YABUMOTO , Tomokazu SAKASHITA
Abstract: A power conversion device comprises an inner coil which can transmit power between an external coil by coupling magnetically with the external coil, an inverter whose AC side is connected to the inner coil and power conversion can be performed between the AC side and a DC side and a bidirectional DC/DC converter which comprises an intermediate capacitor, is connected to the DC side of the inverter and can perform power conversion bidirectionally between a DC power source, which is connected to a side which is opposite to the side of the inverter, and the inverter, wherein in switching operation from power reception to power transmission where power reception operation is switched to power transmission operation, after control of discharging charges which are accumulated in the intermediate capacitor is performed, the power transmission operation is started.
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公开(公告)号：US20190186454A1
公开(公告)日：2019-06-20
申请号：US16309621
申请日：2017-02-28
Applicant: Mitsubishi Electric Corporation
Inventor： Ryota ASAKURA , Tomokazu SAKASHITA , Takahiro INOUE
Abstract: A barrier-discharge-type ignition apparatus that can accurately determine the application voltage, of a barrier ignition plug, that causes a non-ignition discharge to occur. In the barrier-discharge-type ignition apparatus, in a combustion assist control, the voltage difference between the one-period-prior application voltage and the present-period application voltage in the AC period is calculated based on an application voltage detected by a voltage detection circuit; then, it is determined whether or not a discharge exists in the barrier ignition plug, based on the comparison between the voltage difference and a preliminarily set discharge determination threshold value.
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公开(公告)号：US20230294957A1
公开(公告)日：2023-09-21
申请号：US18017083
申请日：2020-09-04
Applicant: Mitsubishi Electric Corporation
Inventor： Mariko NAKAGAWA , Tomokazu SAKASHITA , Takuya MIURA
CPC classification number: B66B1/06 , B66B11/0226 , H02J50/10 , H02J7/0068 , H02J50/40
Abstract: A power transmission unit includes a plurality of power transmission coils provided along a hoistway and at least one power transmission device that supplies power to each of a plurality of power transmission coils. A power reception unit includes a plurality of power reception coils provided on a surface of a car opposite to the power transmission coil and at least one power reception device that receives the power from each of power reception coils. The plurality of power transmission coils include at least a first power transmission coil and a second power transmission coil. A length of the second power transmission coil in a traveling direction of the car is longer than a length of the first power transmission coil.
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Patent Agency Ranking
公开(公告)号：US20220413450A1
公开(公告)日：2022-12-29
申请号：US17777630
申请日：2020-01-07
Applicant: Mitsubishi Electric Corporation
Inventor： Shota WATANABE , Tomokazu SAKASHITA
Abstract: A main circuit includes a switching element, and converts electric power input to the main circuit and supplies a result of the conversion to a load. The controller switches a control scheme of the main circuit from a first control scheme to a second control scheme at a first time point when the output value starts to vary and switches the control scheme of the main circuit from the second control scheme to the first control scheme at a second time point when a determination is made that switching of a variation direction of the output value will occur on the basis of a detection value of the detector.
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公开(公告)号：US20210143680A1
公开(公告)日：2021-05-13
申请号：US17257585
申请日：2019-07-05
Applicant: Mitsubishi Electric Corporation
Inventor： Takuya NAKANISHI , Tomokazu SAKASHITA
Abstract: A first converter performs power conversion and outputs AC power. The AC power outputted from the first converter is supplied to a first coil. The first coil is magnetically coupled with a second coil, and the AC power is transmitted from the first coil to the second coil. A second converter is connected to the second coil, and converts the AC power transmitted to the second coil to DC power and supplies the DC power to a load. A first control unit controls the first converter so as to alternately switch between a first state of outputting rectangular wave voltage which cyclically changes and a second state of outputting constant reference voltage, on the basis of required power of the load.
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公开(公告)号：US20200274440A1
公开(公告)日：2020-08-27
申请号：US16616777
申请日：2018-04-02
Applicant: Mitsubishi Electric Corporation
Inventor： Ryota ASAKURA , Tomokazu SAKASHITA , Takahiro INOUE
Abstract: In order to provide a power conversion device capable of estimating a load voltage with high accuracy without directly detecting the load voltage to be applied to a load, a control circuit is provided, which includes a means for estimating the load voltage to be applied to the load based on an electric current of a resonant circuit, an AC frequency of an inverter and an electrostatic capacitance of the load, or a means for estimating the load voltage based on the electric current of the resonant circuit, the AC frequency of the inverter, an inductance of a resonant coil and a correction coefficient previously set from a relationship between a voltage of the resonant coil and the load voltage, and which controls an output to a target load voltage based on the estimated load voltage.
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公开(公告)号：US20160102647A1
公开(公告)日：2016-04-14
申请号：US14894139
申请日：2013-05-30
Applicant: MITSUBISHI ELECTRIC CORPORATION
Inventor： Takashi HASHIMOTO , Tomokazu SAKASHITA , Takayoshi NAGAI
CPC classification number: F02P7/077 , F02P3/01 , F02P3/02 , F02P3/0442 , F02P3/0876 , F02P9/002 , F02P9/007 , F02P23/045 , H01T15/00
Abstract: In an ignition device of a spark-ignition internal combustion engine that performs ignition with high energy efficiency while reducing power to be input to a spark plug, after a DC-voltage-pulse generation circuit that generates a DC voltage pulse between electrodes of a spark plug is operated by a control circuit, an AC-pulse generation circuit that generates an AC pulse between the electrodes of the spark plug is operated. Furthermore, the control circuit controls the AC-pulse generation circuit with a plurality of group pulses and quiescent periods between the group pulses are provided.
Abstract translation: 在火花点火式内燃机的点火装置中，在降低输入到火花塞的功率的同时，以高能量效率进行点火，在直流电压脉冲发生电路在电火花的电极之间产生直流电压脉冲 插头由控制电路操作，在火花塞的电极之间产生AC脉冲的AC脉冲发生电路被操作。 此外，控制电路以多个组脉冲控制AC脉冲发生电路，并且提供组脉冲之间的静止时段。
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公开(公告)号：US20240317080A1
公开(公告)日：2024-09-26
申请号：US18579502
申请日：2021-07-21
Applicant: Mitsubishi Electric Corporation
Inventor： Mariko NAKAGAWA , Tomokazu SAKASHITA , Hidehito YOSHIDA
Abstract: A wireless power transfer system includes a plurality of power transmitters and a power receiver. The plurality of power transmitters are arranged in a hoistway in line with a moving direction of a car. The power receiver is installed on the car. A power transmitting device supplies electric power to the plurality of power transmitters and the plurality of power transmitters transmits electric power to the power receiver without contact. The electric power received by a power receiving device from the power receiver is supplied to a load device. A dimension of the power receiver in the moving direction of the car is larger than a dimension of each of the plurality of power transmitters in the moving direction of the car.
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