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公开(公告)号：US20210376748A1
公开(公告)日：2021-12-02
申请号：US16760623
申请日：2018-11-05
发明人： Hirotaka DOI , Masaki KOUNO , Tomoisa TANIGUCHI
摘要： In a power converter, an inductance L of a reactor and a capacitance C of a capacitor satisfy a condition of the expression (1) below. In the power converter, a current-limiting circuit between an AC power source and the capacitor is unnecessary. Herein, αm ([A·s]) is a value of a ratio of a maximum rated current squared time product to a maximum rated output current of diodes of a rectifier circuit, Pmax is a maximum power consumption of the motor, Vac is a voltage value of a three-phase AC voltage, and a value of a constant a is 4.3 a . C . C L · Vac 3 P max ≤ α m . ( 1 )
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公开(公告)号：US20230369856A1
公开(公告)日：2023-11-16
申请号：US18029312
申请日：2021-09-21
发明人： Masaki KOUNO , Reiji KAWASHIMA , Keisuke OHTA , Hiroki KOJIMA , Toshiyuki MAEDA
CPC分类号： H02J3/003 , H02J3/46 , H02J2203/10
摘要： [Object] As compared with the case where a device supplies power to an electric line regardless of an index regarding the capacity of power in an electric path, the device may supply the power to the electric line according to the content of supply suitable for the electric path.
[Solution] A power control system includes an acquisition unit that acquires capacity information on capacity of power in an electric path through which power supplied from a power plant passes before the power is received by a device, and a control unit that performs control on, based on the capacity information, supply of power from the device to an electric line through which the power supplied from the power plant passes before the power is received by the device.-
公开(公告)号：US20230327442A1
公开(公告)日：2023-10-12
申请号：US18027048
申请日：2021-09-21
发明人： Masaki KOUNO , Reiji KAWASHIMA , Keisuke OHTA , Hiroki KOJIMA
IPC分类号： H02J3/01
CPC分类号： H02J3/01
摘要： [Problem to be solved] To achieve adjustment of an electric line based on indexes set separately for harmonic components having different orders in a current in the electric line.
[Solution] A power control system causes a device to adjust apparent power in an electric line, and the power control system includes a setting unit that sets an index regarding each adjustment for a harmonic component of a first order group in a current in the electric line, a harmonic component of a second order group higher in order than the first order group in the current in the electric line, and a fundamental component in the current in the electric line, and a control unit that controls each adjustment by the device based on the index set by the setting unit.-
公开(公告)号：US20230275571A1
公开(公告)日：2023-08-31
申请号：US18006616
申请日：2021-07-20
发明人： Ryou MATSUYAMA , Reiji KAWASHIMA , Masaki KOUNO
IPC分类号： H03H11/04
CPC分类号： H03H11/04
摘要： A technology that can reduce the influence of variations in the reference potential of each current output device on the operation of multiple current output devices, when using the multiple current output devices to reduce the distortion of the load current, is provided. An embodiment of the present disclosure includes a plurality of active filters 41 to 43 configured to reduce distortion of a load current supplied from the AC power supply 10 to the load device 20, based on a detection signal output from the load current sensor 30, the detection signal relating to the distortion of the load current; and the signal transmitting unit 44 configured to cause the plurality of active filters 41 to 43 to acquire a signal relating to the distortion of the load current, to reduce influence due to variation of a standard potential of the plurality of active filters 41 to 43, based on the detection signal output from the load current sensor 30.
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公开(公告)号：US20230145005A1
公开(公告)日：2023-05-11
申请号：US18090177
申请日：2022-12-28
发明人： Masahide FUJIWARA , Nobuyasu HIRAOKA , Keito KOTERA , Taku ITOU , Masaki KOUNO , Reiji KAWASHIMA
CPC分类号： H02M7/537 , H05K7/209 , H05K1/181 , H05K2201/10015
摘要： To achieve high density integration of components while securing an insulation distance between a bootstrap capacitor and an intelligent power module. In a printed wiring board, a region where a capacitor is mounted is located in a region where an intelligent power module is mounted. Therefore, the capacitor mounted on the printed wiring board is placed between the printed wiring board and the intelligent power module.
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公开(公告)号：US20200304051A1
公开(公告)日：2020-09-24
申请号：US16759513
申请日：2018-10-30
发明人： Masaki KOUNO , Hirotaka DOI , Yukihide YAMANE
摘要： A power conversion apparatus includes a rectifier circuit, an inverse conversion circuit, and a capacitor. The rectifier circuit rectifies alternating current power of the alternating current power supply. The inverse conversion circuit inversely converts a voltage Vdc rectified by the rectifier circuit into an alternating current voltage having a certain frequency and applies the alternating current voltage to a motor whose maximum power consumption Pmax is 2 kW or larger. The capacitor is provided between the rectifier circuit and the inverse conversion circuit and has a capacitance C that satisfies a condition of a following expression in relation to an alternating current voltage Vac of the alternating current power supply and the maximum power consumption Pmax. C ≤ 350 × 10 - 6 P max Vac 2 . ( 1 )
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公开(公告)号：US20230358455A1
公开(公告)日：2023-11-09
申请号：US18026184
申请日：2021-09-21
发明人： Masaki KOUNO , Reiji KAWASHIMA , Toshiyuki MAEDA , Keisuke OHTA
CPC分类号： F25B49/02 , H02J3/22 , H02J3/01 , H02J3/16 , H02J13/00007 , F25B2600/024 , F25B2700/21 , F25B2700/02
摘要： [Object] On the basis of a limit of an operation of a control unit that is connected to a power-receiving path of a converting unit, is electrically parallel with the converting unit, and controls apparent power in the power-receiving path of the converting unit, the operation of the control unit is controlled.
[Solution] A power control system includes: an acquisition section that acquires control unit information related to a limit of an operation by a control unit provided for a heat pump system that regulates temperature and/or humidity; and a control section that controls an operation of the control unit on the basis of the control unit information. The control unit is connected to a power-receiving path of a converting unit that converts received power and supplies the converted power to a load used for the regulating. The control unit is electrically parallel with the converting unit. The control unit controls apparent power in the power-receiving path.-
公开(公告)号：US20230327706A1
公开(公告)日：2023-10-12
申请号：US18028107
申请日：2021-09-21
发明人： Masaki KOUNO , Toshiyuki MAEDA , Reiji KAWASHIMA , Keisuke OHTA , Hiroki KOJIMA
IPC分类号： H04B3/54
CPC分类号： H04B3/544 , H04B3/542 , H04B2203/5487 , H04B2203/5491
摘要： [Problem] As compared with the case where the apparent power in the electric line on the supply side is adjusted without supplying the current to the electric line closer to the power supply side than the distribution transformer, there is a reduction in the effect of the state in the electric line closer to the power reception side than the distribution transformer on the adjustment of the apparent power in the electric line closer to the power supply side than the distribution transformer.
[Solution] A power control system includes a device that receives power from an electric line of a distribution system via a distribution transformer, an acquisition unit that acquires electric line information on the electric line, and a control unit that causes the device to generate a current used for adjustment of apparent power in the electric line based on the electric line information acquired by the acquisition unit.-
公开(公告)号：US20190238046A1
公开(公告)日：2019-08-01
申请号：US16335745
申请日：2017-07-11
发明人： Reiji KAWASHIMA , Takayuki FUJITA , Masaki KOUNO
摘要： A current source capable of generating a current of a first compensation portion for either or both reducing a harmonic current in an air conditioner or improving a fundamental power factor in the air conditioner is provided. If an excess of the current source is larger than a second compensation portion for either or both reducing a harmonic current in a power receiving path of a distribution board or improving a fundamental power factor in the power receiving path of the distribution board, a current obtained through superimposition of a current of a second compensation component and a current of the first compensation component is generated in the current source.
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