公开(公告)号：US20210203246A1

公开(公告)日：2021-07-01

申请号：US17270564

申请日：2018-09-28

Applicant: Mitsubishi Electric Corporation

Inventor： Keisuke UEMURA ,  Satoru ICHIKI ,  Takuya SHIMOMUGI ,  Koichi ARISAWA ,  Kenji IWAZAKI

IPC: H02M7/219 ,  H02M1/08 ,  H02M1/38 ,  H02M1/44 ,  H02P27/08 ,  F25B31/02

Abstract: A power converting apparatus includes: a bridge circuit that includes at least two legs each including switching elements connected in series, and converts an alternating-current voltage output from an alternating-current power supply into a direct-current voltage; a power-supply current detecting unit that detects a current from the alternating-current power supply; a zero crossing detecting unit that detects a voltage polarity of the alternating-current power supply; and a control unit that controls ON and OFF of the switching elements depending on outputs of the power-supply current detecting unit and the zero crossing detecting unit, in which a dead time that is set for switching and includes a change in the voltage polarity of the alternating-current power supply is longer than a dead time that is set for switching and does not include a change in the polarity.

公开(公告)号：US20170207718A1

公开(公告)日：2017-07-20

申请号：US15326776

申请日：2014-08-05

Applicant: Mitsubishi Electric Corporation

Inventor： Takuya SHIMOMUGI ,  Koichi ARISAWA ,  Takashi YAMAKAWA ,  Yuji TAKAYAMA

IPC: H02M7/06 ,  H02M1/42 ,  H02M1/08 ,  H02M1/12

CPC classification number: H02M7/06 ,  H02M1/083 ,  H02M1/12 ,  H02M1/42 ,  H02M1/4208 ,  H02M7/217 ,  H02M2001/0009 ,  Y02B70/126

Abstract: A power converting device includes: a rectifying circuit connected to an alternating-current power supply for converting alternating-current power from the alternating-current power supply into direct-current power; a short-circuit unit constituted by a diode bridge and a short-circuit element connected to opposite output ends of the diode bridge for short-circuiting the alternating-current power supply via a reactor; and a control unit that generates plural drive signals to control the short-circuit unit during a half cycle of the alternating-current power supply. The control unit generates a sine-wave-shaped current control range that is a target control range of power supply current of the alternating-current power supply, and maintains values of the power supply current of the alternating-current power supply within the current control range.

公开(公告)号：US20160241181A1

公开(公告)日：2016-08-18

申请号：US15027735

申请日：2013-12-03

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Keisuke UEMURA ,  Takuya SHIMOMUGI ,  Koichi ARISAWA ,  Yosuke SHINOMOTO ,  Shigeo UMEHARA ,  Shinichiro URA ,  Makoto TANIKAWA

IPC: H02P27/08 ,  F25B31/02 ,  F24F7/06 ,  F24F7/007 ,  F24F1/00 ,  H02M7/537 ,  F25D17/06

CPC classification number: H02P27/08 ,  F24F1/0018 ,  F24F7/007 ,  F24F7/06 ,  F25B31/02 ,  F25D17/062 ,  F25D2317/0681 ,  H02M7/537 ,  H02M7/5387 ,  H02M2001/0009 ,  H02M2001/0048 ,  H02M2007/53876 ,  H02P21/18 ,  Y02B70/1491

Abstract: A power conversion device includes an inverter configured by arms including phase upper-arm switching elements and phase lower-arm switching elements, a power-supply shunt resistor, lower-arm shunt resistors, and a control unit that generates drive signals corresponding to the phase upper-arm switching elements and the phase lower-arm switching elements from detection values of the voltage detectors. The power conversion device changes a ratio of time in which all of the upper-arm switching elements are in an ON state and time in which all of the lower-arm switching elements are in the ON state in one cycle of switching of the inverter according to a modulation ratio.

Abstract translation: 电力转换装置包括由包括相位上臂开关元件和相位下臂开关元件的臂构成的反相器，电源分流电阻器，下臂分流电阻器和产生对应于相位的驱动信号的控制单元 上臂开关元件和相位下臂开关元件从电压检测器的检测值。 功率转换装置改变所有上臂开关元件处于导通状态的时间和所有下臂开关元件处于导通状态的时间的比率，在逆变器的一个开关周期中 调制比。

公开(公告)号：US20160233783A1

公开(公告)日：2016-08-11

申请号：US15022577

申请日：2013-09-25

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Keisuke UEMURA ,  Takuya SHIMOMUGI ,  Koichi ARISAWA ,  Yosuke SHINOMOTO ,  Shigeo UMEHARA ,  Shinichiro URA ,  Makoto TANIKAWA

IPC: H02M7/04 ,  H02M7/44 ,  H02M1/32

CPC classification number: H02M7/04 ,  H02M1/08 ,  H02M1/32 ,  H02M7/44 ,  H02M7/5387

Abstract: A switch device in a power conversion device is located between a power supply and a load, wherein the power conversion device includes a shunt resistance and a switching element and is capable of executing stable control, the switch device includes a switching element that includes a gate terminal, a gate drive circuit that applies a drive voltage Vcc to a gate terminal of the switching element, and a control unit that generates a drive signal to the gate drive circuit, wherein a value obtained by subtracting a threshold voltage Vth of the switching element from the drive voltage Vcc to be applied to the gate terminal of the switching element is greater than a product of a resistance value Rsh+Rdc from an emitter of the switching element to a negative electrode of the gate drive circuit and a maximum current value Ipeak that flows through the switching element.

Abstract translation: 电力转换装置中的开关装置位于电源和负载之间，其中电力转换装置包括分流电阻和开关元件，并且能够执行稳定的控制，开关装置包括开关元件，其包括栅极 端子，将驱动电压Vcc施加到开关元件的栅极端子的栅极驱动电路，以及向栅极驱动电路产生驱动信号的控制单元，其中通过减去开关元件的阈值电压Vth获得的值 从施加到开关元件的栅极端子的驱动电压Vcc大于从开关元件的发射极到栅极驱动电路的负极的电阻值Rsh + Rdc的乘积和最大电流值Ipeak 其流过开关元件。

公开(公告)号：US20160056715A1

公开(公告)日：2016-02-25

申请号：US14781606

申请日：2013-04-02

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Koichi ARISAWA ,  Takuya SHIMOMUGI ,  Takashi YAMAKAWA ,  Keisuke UEMURA ,  Yosuke SHINOMOTO ,  Kenta YUASA ,  Akihiro TSUMURA ,  Noriyuki MATSUBARA ,  Shinsaku KUSUBE

IPC: H02M3/08

CPC classification number: H02M3/08 ,  H02M1/34 ,  H02M3/156 ,  H02M2001/0051 ,  H02M2001/346 ,  Y02B70/1491

Abstract: 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.

Abstract translation: 一种用于将电力从电源转换为负载的功率转换器，包括：升压装置，其包括被配置为防止电流从负载逆流到电源的升压整流器，所述升压装置被配置为改变电压 从电源到预定电压的电力; 以及换向装置，包括：换向操作装置，被配置为执行将流过所述升压装置的电流引导到另一路径的换向操作; 以及包括多个整流器并且在另一路径上串联连接的换向整流器，所述换向整流器被配置为对与换向相关的电流进行整流，由此减小电容分量。

公开(公告)号：US20160036350A1

公开(公告)日：2016-02-04

申请号：US14779991

申请日：2013-04-12

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Keisuke UEMURA ,  Takuya SHIMOMUGI ,  Koichi ARISAWA ,  Yosuke SHINOMOTO ,  Shigeo UMEHARA ,  Shinichiro URA ,  Makoto TANIKAWA

IPC: H02M7/5387 ,  H02P6/00

CPC classification number: H02M7/53871 ,  H02M7/53873 ,  H02M7/53875 ,  H02M2001/0009 ,  H02M2007/53876 ,  H02P27/06

Abstract: The power conversion device includes a power-supply shunt resistor provided between a negative voltage side of a DC power supply and an inverter and phase lower-arm shunt resistors respectively provided between phase lower-arm switching elements of two arms among three arms and the power-supply shunt resistor. The power conversion device detects voltages between connection points of the phase lower-arm switching elements and the phase lower-arm shunt resistors and a negative voltage side of the DC power supply and calculates, on the basis of detection values of the voltages, phase currents flowing to a load device.

Abstract translation: 电力转换装置包括设置在直流电源的负电压侧和逆变器之间的电源分流电阻器和分别设置在三个臂之间的两个臂的相位下臂开关元件之间的相位下臂分流电阻器，并且电力 - 分流电阻。 电力转换装置检测相位下臂开关元件和相位下臂分流电阻的连接点与直流电源的负电压侧之间的电压，并根据电压的检测值，相位电流 流入负载设备。

公开(公告)号：US20210313902A1

公开(公告)日：2021-10-07

申请号：US17268286

申请日：2018-08-24

Applicant: Mitsubishi Electric Corporation

Inventor： Satoru ICHIKI ,  Takuya SHIMOMUGI ,  Koichi ARISAWA ,  Keisuke UEMURA ,  Kenji IWAZAKI

IPC: H02M7/219 ,  H02M1/00 ,  G01R19/165 ,  H02P27/06 ,  F24F11/77

Abstract: A direct-current power supply apparatus includes: a reactor having one end connected to an alternating-current power supply; a bridge circuit, connected to an opposite end of the reactor, converting an alternating-current first voltage output from the alternating-current power supply into a direct-current voltage; and a current detector detecting an alternating current flowing between the alternating-current power supply and the bridge circuit. The reactor reduces an inductance in accordance with an increase of the alternating current and, when the alternating current exceeds a first current, has an inductance lower than one third of an inductance at which a current does not flow in the reactor. The bridge circuit performs an active operation when the detection value of the alternating current is larger than or equal to the first current and performs a passive operation when the detection value of the alternating current is lower than the first current.

公开(公告)号：US20210293419A1

公开(公告)日：2021-09-23

申请号：US17265985

申请日：2018-08-09

Applicant: Mitsubishi Electric Corporation

Inventor： Kenji IWAZAKI ,  Koichi ARISAWA ,  Takuya SHIMOMUGI ,  Keisuke MORI ,  Yuya KONDO ,  Satoru ICHIKI ,  Keisuke UEMURA

IPC: F24F1/16 ,  F24F1/24 ,  F24F1/48 ,  F24F1/56 ,  F24F11/88

Abstract: An outdoor unit includes a housing, a heat exchanger, an electric component box, a substrate, and a heat dissipator including multiple fins. The fins each have a first end situated in a windward side of an air passage formed between adjacent ones of the fins, and the first end faces the electric component box. When the heat dissipator and the electric component box are viewed from above, a first clearance gap having a first width and a second clearance gap having a second width greater than the first width are formed between the first end and the electric component box. The second clearance gap is situated closer to a back panel than the first clearance gap.

公开(公告)号：US20210234464A1

公开(公告)日：2021-07-29

申请号：US17256468

申请日：2018-07-26

Applicant: Mitsubishi Electric Corporation

Inventor： Koichi ARISAWA ,  Takuya SHIMOMUGI ,  Satoru ICHIKI ,  Kenji IWAZAKI

IPC: H02M3/158 ,  H02M1/08 ,  H02P27/06 ,  H02M1/34 ,  F25B49/02

Abstract: There are provided a booster to boost a voltage from a power supply, the booster including multiple stages connected in parallel; and a smoothing device to smooth the boosted voltage. Each of the multiple stages includes: an energy storage to receive current from the power supply and store energy; a switch to switch between connection and disconnection of a path for short-circuiting current from the energy storage; and a backflow preventer to prevent backflow from the smoothing device. At least one of the multiple stages is provided with a characteristic adjuster for adjusting switching characteristics of the switch.

公开(公告)号：US20210028703A1

公开(公告)日：2021-01-28

申请号：US17045627

申请日：2018-05-29

Applicant: Mitsubishi Electric Corporation

Inventor： Kenji IWAZAKI ,  Koichi ARISAWA ,  Takashi YAMAKAWA ,  Takuya SHIMOMUGI ,  Satoru ICHIKI ,  Ikuro SUGA

IPC: H02M3/158 ,  H02M7/06 ,  H02P27/06 ,  H02M1/34

Abstract: A power converter is connected between a power supply source of a first direct current power and a power supply destination of a second direct current power obtained by performing power conversion on the first direct current power. The power converter includes: a switching element; a reactor; a first diode; a first capacitor; a second diode. The reactor is connected to a first end of the switching element. The first end of the switching element and a first end of the reactor are connected to a first connection point. A cathode of the first diode is connected to a second end of the reactor. The cathode of the first diode and the second end of the reactor are connected to a second connection point. The second diode includes an anode connected to the first connection point and a cathode connected to the power supply destination.