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公开(公告)号：US11309709B2
公开(公告)日：2022-04-19
申请号：US17056642
申请日：2018-07-18
摘要： A harmonic current compensating device according to an embodiment of the present disclosure is a harmonic current compensating device including a power converter including at least a pair of arms each including a switching element, the harmonic current compensating device being configured to drive the switching element and supply compensating current to load current flowing between a system power source and a harmonic generating load, in which the switching element includes a unipolar device using a wide bandgap semiconductor.
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公开(公告)号：US10404196B2
公开(公告)日：2019-09-03
申请号：US14902039
申请日：2014-07-02
发明人： Takuya Shimomugi , Koichi Arisawa , Takashi Yamakawa , Keisuke Uemura , Noriyuki Matsubara , Shinsaku Kusube , Kenta Yuasa , Akihiro Tsumura
IPC分类号： H02P6/28 , H02M3/158 , F24F7/007 , F25B31/02 , H02M1/34 , H02P27/06 , H02M1/00 , H02M1/42 , H02M7/00
摘要： A backflow preventing device includes a backflow preventing element that is connected between a power supply and a load and that prevents electric current from flowing backward from the load side toward the power supply side, and a commutating device that performs a commutation operation for causing the electric current to flow to a commutation path connected in parallel with the backflow preventing element. A plurality of elements including at least one or more of elements constituting the commutating device are configured as a module, so that, for example, the device can be reduced in size. Moreover, a simplified heat-dissipation design and a simplified air-duct design can be achieved.
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公开(公告)号：US09621025B2
公开(公告)日：2017-04-11
申请号：US14901270
申请日：2013-07-02
发明人： Takuya Shimomugi , Koichi Arisawa , Takashi Yamakawa , Keisuke Uemura , Noriyuki Matsubara , Shinsaku Kusube , Kenta Yuasa , Akihiro Tsumura
CPC分类号： H02M1/32 , H02M3/156 , H02M3/158 , H02M2001/0051 , H02M2001/325 , H02P27/06 , H03K17/16 , H03K17/74 , Y02B70/1491
摘要： A backflow preventing device includes a backflow preventing element that is connected between a power supply and a load and that prevents electric current from flowing backward from the load side toward the power supply side, a commutating device that performs a commutation operation for causing the electric current to flow to a commutation path connected in parallel with the backflow preventing element, and a controller that sets a time for performing the commutation operation and causes the commutating device to perform the commutation operation based on the set time. The backflow preventing device has a plurality of the commutation paths and has, for example, elements with small current-carrying capacities disposed in the commutation paths to achieve cost reduction and to cope with, for example, failures, thereby allowing for enhanced reliability for reducing recovery electric current.
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公开(公告)号：US11509232B2
公开(公告)日：2022-11-22
申请号：US16958466
申请日：2018-02-16
发明人： Kenta Yuasa , Akihiro Tsumura , Shigeo Takata , Shinsaku Kusube
摘要： A power converter includes a rectifier configured to rectify an AC voltage supplied from an AC power supply, a booster circuit configured to boost the voltage rectified by the rectifier, a smoothing capacitor configured to smooth the voltage output from the booster circuit, a power module configured to convert a DC voltage obtained by smoothing the output voltage by the smoothing capacitor into an AC voltage, and a snubber capacitor configured to absorb a surge voltage superimposed on the DC voltage to be input to the power module. The snubber capacitor is mounted in the power module.
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公开(公告)号：US10724748B2
公开(公告)日：2020-07-28
申请号：US16301457
申请日：2016-07-22
摘要： An air-conditioning apparatus includes a refrigerant pipe through which refrigerant that flows through the refrigeration cycle passes; a pipe-side plate thermally connected to the refrigerant pipe; a control box thermally connected to the pipe-side plate and containing an electric component including a heating element; a housing of an outdoor unit, the housing containing the pipe-side plate and the control box; a positioning element fixing the pipe-side plate and the control box to each other; and a fastening element fixing the control box and the positioning element to each other. At least one side surface of the housing has a work opening. A front portion of the control box is positioned closer to the work opening in the housing, and a rear portion of the control box is positioned closer to a rear surface of the housing, the rear surface facing the side surface having the work opening.
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公开(公告)号：US10116205B2
公开(公告)日：2018-10-30
申请号：US14901251
申请日：2014-07-02
发明人： Koichi Arisawa , Takuya Shimomugi , Takashi Yamakawa , Keisuke Uemura , Noriyuki Matsubara , Shinsaku Kusube , Kenta Yuasa , Akihiro Tsumura
摘要： Provided is a power conversion device configured to convert electric power from a power source to a load, including: a boosting device including a boost rectification unit configured to prevent backflow of a current from the load side to the power source side, the boosting device being configured to change a voltage of power from the power source to a predetermined voltage based on a drive signal; a commutation device configured to perform commutation operation in which a current flowing through the boosting device is caused to flow into an other path based on a commutation signal; and a signal generating module device configured as a module to generate and send an output signal based on an input signal that is input thereto. The input signal has an on-pulse width greater than a length of time where the output signal generated by the signal generating module device is turned on.
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7.发明授权公开(公告)号：US10003184B2
公开(公告)日：2018-06-19
申请号：US14780036
申请日：2014-03-18
发明人： Takuya Shimomugi , Koichi Arisawa , Takashi Yamakawa , Keisuke Uemura , Shinsaku Kusube , Kenta Yuasa , Akihiro Tsumura
IPC分类号： F25B49/00 , H02P6/04 , H02M3/335 , H02M1/12 , H02H3/00 , H02M3/158 , H02M1/42 , H02M1/00 , H02M1/34
CPC分类号： H02H3/003 , H02M1/4225 , H02M3/158 , H02M2001/0051 , H02M2001/342 , Y02B70/126 , Y02B70/1491
摘要： A backflow preventing device includes a backflow preventing element connected between a power source and a load, for preventing a backflow of a current from the load side to the power source side, a commutation device configured to perform a commutation operation of causing a current to flow through an other path connected in parallel to the backflow preventing element, and a controller configured to change a pulse width of a commutation drive signal for controlling the commutation device to perform the commutation operation based on a current flowing through the backflow preventing element, and transmitting the commutation drive signal having the changed pulse width to the commutation device. The controller transmits the pulse to the commutation device only for a necessary time period so that the commutation device performs the commutation operation, to thereby reduce electric power relating to the commutation operation not contributing to the power conversion.
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公开(公告)号：US09742267B2
公开(公告)日：2017-08-22
申请号：US14781606
申请日：2013-04-02
发明人： Koichi Arisawa , Takuya Shimomugi , Takashi Yamakawa , Keisuke Uemura , Yosuke Shinomoto , Kenta Yuasa , Akihiro Tsumura , Noriyuki Matsubara , Shinsaku Kusube
CPC分类号： H02M3/08 , H02M1/34 , H02M3/156 , H02M2001/0051 , H02M2001/346 , Y02B70/1491
摘要： A power converter for converting electrical power from a power source to a load, including: a boosting device including a boost rectifier configured to prevent a backflow of a current from the load to the power source, the boosting device being configured to change a voltage of electrical power from the power source to a predetermined voltage; and a commutation device including: a commutation operation device configured to perform a commutation operation of directing a current flowing through the boosting device to an other path; and a commutation rectifier including a plurality of rectifiers and connected in series on the other path, the commutation rectifier being configured to rectify a current relating to commutation, thereby reducing a capacitance component.
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9.发明授权公开(公告)号：US09941834B2
公开(公告)日：2018-04-10
申请号：US15316561
申请日：2014-07-03
发明人： Keiwa Tsukano , Akihiko Iwata , Shinsaku Kusube , Kenta Yuasa , Akihiro Tsumura
CPC分类号： H02P27/14 , F25B31/02 , F25B49/025 , F25B2600/021 , F25B2600/025 , H02M1/14 , H02M5/4585 , H02P27/06
摘要： A power conversion apparatus, including: an MLC circuit configured to boost an input voltage from a three-phase rectifier; a smoothing capacitor configured to smooth an output of the MLC circuit; an inverter control unit configured to generate a PWM signal; an inverter circuit configured to convert a DC voltage of the smoothing capacitor into an AC voltage based on an input of the PWM signal and to supply the AC voltage to a motor; a boost mode switching unit having at least three boost modes in which a boost level of the input voltage is selected and configured to switch among the at least three boost modes depending on an operation status of the motor determined for the purpose of controlling a refrigeration cycle; and an MLC control unit configured to control the MLC circuit based on the switching by the boost mode switching unit.
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公开(公告)号：US09735666B2
公开(公告)日：2017-08-15
申请号：US14782058
申请日：2013-04-12
CPC分类号： H02M1/32 , H02M1/4225 , H02M3/155 , H02M3/156 , H02M7/06 , H02M2001/322 , Y02B70/126
摘要： A power conversion device located between an AC power source and a load includes: a rectifier circuit unit that rectifies a voltage of the AC power source; a smoothing unit that smooths a DC voltage on the load side of the rectifier circuit unit; a short-circuiting unit that short-circuits the AC power source; a step-up reactor—located on the AC power source side of the short-circuiting unit; at least one of a reactor current detecting unit—that detects the current of the step-up reactor and a bus voltage detecting unit that detects an output voltage of the smoothing unit; a counterflow preventing element that prevents a counterflow of the current from the smoothing unit to the AC power source; a switching control unit that outputs a control signal for the short-circuiting unit; and a switching frequency changing unit that changes a frequency of the control signal using a logic operation.
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