公开(公告)号：US20250062679A1

公开(公告)日：2025-02-20

申请号：US18720707

申请日：2021-12-27

Applicant: Mitsubishi Electric Corporation

Inventor： Yuki TANIYAMA ,  Yosuke HACHIYA ,  Kenta YUASA ,  Akane HONGYO ,  Yuichi SHIMIZU ,  Atsushi TSUCHIYA

IPC: H02M1/12 ,  H02M7/219 ,  H02M7/5387 ,  H02P23/14 ,  H02P25/024 ,  H02P27/08

Abstract: A power conversion apparatus includes: a rectifying unit that rectifies an AC voltage input from an AC power supply to convert the AC voltage into a DC link voltage; a capacitor that is charged with a DC link voltage converted by the rectifying unit; a power application unit that converts the DC link voltage with which the capacitor is charged into an AC voltage by switching the DC link voltage, and outputs the AC voltage to a motor; and a control unit that controls the power application unit. The control unit controls the power application unit such that a second beat is superimposed on a motor current, the second beat having a second frequency different from a first beat having a first frequency included in the motor current and having at least one of an amplitude or a phase aligned with the first beat.

公开(公告)号：US20160265822A1

公开(公告)日：2016-09-15

申请号：US15030389

申请日：2013-10-29

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Shota KAMIYA ,  Kazunori HATAKEYAMA ,  Norikazu ITO ,  Kenta YUASA ,  Shoji ISODA

IPC: F25B31/02 ,  H02M1/32 ,  H02M1/12 ,  H02M1/42 ,  H02M7/06 ,  H02M1/08

CPC classification number: F25B31/02 ,  H02M1/08 ,  H02M1/12 ,  H02M1/32 ,  H02M1/36 ,  H02M1/42 ,  H02M1/4225 ,  H02M3/158 ,  H02M7/06 ,  H02M7/062 ,  H02M7/217 ,  H02M2001/0009 ,  H02M2001/007 ,  Y02B70/126

Abstract: A DC power-supply device that suppresses an excessive inrush current, can prevent breakage of elements and burnout of circuits, and converts alternating current from a three-phase AC power supply into direct current to supply it to a load, includes a rectifier circuit having a reactor connected to input or output side thereof and rectifying the alternating current from the three-phase AC power supply; first and second capacitors and connected in series between output terminals to the load; a charging unit selectively charges one or both of the first and second capacitors; and a control unit controlling the charging unit. When charging of the first and second capacitors is started, the control unit reduces the on-duty ratio, and then, until the on-duty ratio during a normal operation is reached, the control unit executes control such that the on-duty ratio is gradually increased as a predetermined time period is passed.

Abstract translation: 抑制过大的浪涌电流的直流电源装置能够防止元件的损坏和电路的烧坏，并将来自三相交流电源的交流电转换成直流电，将其提供给负载，该整流电路具有： 连接到其输入或输出侧的电抗器，并对来自三相AC电源的交流电进行整流; 第一和第二电容器并串联在输出端子与负载之间; 充电单元选择性地对第一和第二电容器中的一个或两个进行充电; 以及控制所述充电单元的控制单元。 当开始对第一和第二电容器进行充电时，控制单元降低占空比，然后直到达到正常操作期间的占空比，控制单元执行控制，使得占空比为 随着预定时间段的过去，逐渐增加。

公开(公告)号：US20160305417A1

公开(公告)日：2016-10-20

申请号：US14901251

申请日：2014-07-02

Applicant: MITSUBISHI ELECTRIC CORPORATION

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

IPC: F04B49/06 ,  F04B17/03 ,  H02M1/088

CPC classification number: H02M1/4208 ,  H02M1/34 ,  H02M3/158 ,  H02M3/1584 ,  H02M2001/0051 ,  H02M2001/342 ,  Y02B70/1491

Abstract: 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.

Abstract translation: 提供了一种电力转换装置，其被配置为将电力从电源转换为负载，包括：升压装置，包括升压整流单元，其被配置为防止电流从负载侧向电源侧的回流，所述升压装置为 被配置为基于驱动信号将来自所述电源的电力电压改变为预定电压; 换向装置，被配置为执行换流操作，其中流过所述升压装置的电流基于换向信号而流入另一路径; 以及信号生成模块装置，被配置为基于输入的输入信号生成并发送输出信号的模块。 输入信号具有大于信号产生模块装置产生的输出信号导通的时间长度的导通脉冲宽度。

公开(公告)号：US20160294312A1

公开(公告)日：2016-10-06

申请号：US14894609

申请日：2013-09-30

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Akihiro TSUMURA ,  Kenta YUASA ,  Shinsaku KUSUBE

IPC: H02P6/28

CPC classification number: H02P6/28 ,  H01L29/1608 ,  H02M1/4225 ,  H02M5/458 ,  H02M2001/007 ,  H02P2201/03 ,  H02P2201/09 ,  Y02B70/126

Abstract: A motor drive control apparatus according to the present invention includes: a three-phase rectifier to rectify an AC voltage supplied from a three-phase AC source; a booster circuit including a reactor, a switching element, and a backflow preventing element, to boost a DC bus voltage supplied from the three-phase rectifier; a smoothing capacitor to smooth an output of the booster circuit; and an inverter circuit to convert the DC bus voltage smoothed by the smoothing capacitor into an AC voltage and supplying the AC voltage to a motor. During a starting operation of a boosting operation of the booster circuit or a stopping operation of the boosting operation thereof, a rotation speed of the motor is fixed.

Abstract translation: 根据本发明的电动机驱动控制装置包括：三相整流器，对三相交流电源提供的交流电压进行整流; 包括电抗器，开关元件和防回流元件的升压电路，用于升压从三相整流器供给的直流母线电压; 平滑电容器，用于平滑升压电路的输出; 以及将由平滑电容器平滑的DC总线电压转换为AC电压并将AC电压提供给电动机的逆变器电路。 在升压电路的升压动作的起动动作或其升压动作的停止动作中，电动机的转速固定。

公开(公告)号：US20160146523A1

公开(公告)日：2016-05-26

申请号：US14787288

申请日：2013-05-23

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Kazunori HATAKEYAMA ,  Shota KAMIYA ,  Kenta YUASA ,  Shinya MATSUSHITA ,  Shinsaku KUSUBE

IPC: F25B49/02

CPC classification number: F25B49/025 ,  F25B1/10 ,  F25B13/00 ,  F25B40/00 ,  F25B2313/003 ,  F25B2341/0662 ,  F25B2400/13 ,  F25B2600/021 ,  H02M7/5395 ,  Y02B30/741

Abstract: A heat pump device capable of efficiently and reliably preventing a liquid refrigerant from stagnating in a compressor an air conditioner, a heat pump water heater, a refrigerator, and a freezing machine including the heat pump device. The configuration is such that, when the compressor is under operation standby, a high-frequency voltage synchronizing with a carrier signal is supplied to the compressor motor to carry out the locked energization of the compressor motor. From respective inter-phase voltages, respective phase voltages, or respective phase currents of the compressor motor for a plurality of high-frequency energization cycles, the detection values for one high-frequency energization cycle are restored. A power value calculated using the restored detection values for one high-frequency energization cycle is controlled to coincide with a heating power command necessary for discharging the liquid refrigerant stagnated in the compressor to the outside of the compressor.

Abstract translation: 一种热泵装置，其能够有效且可靠地防止液体制冷剂在空调机，热泵热水器，冰箱和包括该热泵装置的冷冻机中停滞在压缩机中。 该结构使得当压缩机处于待机状态时，与载波信号同步的高频电压被提供给压缩机马达，以执行压缩机马达的锁定通电。 从多个高频通电周期的压缩机电动机的各相电压，各相电压或各相电流可以恢复一个高频通电周期的检测值。 控制使用恢复的一个高频通电循环的检测值计算出的功率值，以使与滞留在压缩机中的液体制冷剂排出到压缩机外部所需的加热功率指令一致。

公开(公告)号：US20160036317A1

公开(公告)日：2016-02-04

申请号：US14782058

申请日：2013-04-12

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Takuya SHIMOMUGI ,  Kenta YUASA ,  Yosuke SHINOMOTO ,  Shinsaku KUSUBE

IPC: H02M1/32 ,  H02M7/06

CPC classification number: H02M1/32 ,  H02M1/4225 ,  H02M3/155 ,  H02M3/156 ,  H02M7/06 ,  H02M2001/322 ,  Y02B70/126

Abstract: 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.

Abstract translation: 位于AC电源和负载之间的电力转换装置包括：整流电路单元，对AC电源的电压进行整流; 平滑单元，使整流电路单元的负载侧的直流电压平滑; 短路单元，使交流电源短路; 位于短路单元的交流电源侧的升压电抗器; 检测升压电抗器的电流的电抗器电流检测单元和检测平滑单元的输出电压的母线电压检测单元中的至少一个; 防止来自平滑单元的电流逆流到AC电源的逆流防止元件; 切换控制部，输出短路部的控制信号; 以及切换频率改变单元，其使用逻辑运算来改变控制信号的频率。

公开(公告)号：US20230003798A1

公开(公告)日：2023-01-05

申请号：US17781367

申请日：2020-02-17

Applicant: Mitsubishi Electric Corporation

Inventor： Kenta YUASA ,  Kazunori SAKANOBE ,  Mamoru KAMIKURA ,  Toshiyuki KURIYAMA

IPC: G01R31/34 ,  H02P27/06 ,  H02P25/022 ,  G01R19/00

Abstract: a permanent magnet synchronous motor diagnostic device includes: a negative-sequence current calculator that calculates a negative-sequence current, based on magnitudes of a plurality of phase currents flowing through a permanent magnet synchronous motor that rotates a load; and a deterioration diagnoser that diagnoses deterioration of a plain bearing supporting the permanent magnet synchronous motor, based on the negative-sequence current.

公开(公告)号：US20170201186A1

公开(公告)日：2017-07-13

申请号：US15320503

申请日：2014-09-05

Applicant: Mitsubishi Electric Corporation

Inventor： Kenta YUASA ,  Shinsaku KUSUBE ,  Akihiro TSUMURA ,  Akihiko IWATA

IPC: H02M5/458 ,  H02M1/08 ,  F25B31/02 ,  H02K7/14 ,  H02P6/10 ,  H02M1/32 ,  H02P27/08

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M1/14 ,  H02M2001/0054 ,  Y02B70/1491

Abstract: A rectifier, a booster circuit configured to boost an output voltage of the rectifier, a smoothing capacitor configured to smooth an output voltage of the booster circuit, and an inverter circuit configured to convert a DC voltage of the smoothing capacitor to an AC voltage and drive a motor forming a part of a device supplied with the voltage after the conversion, are included. In addition, a reactor, a first backflow prevention element, a second backflow prevention element, a first switching element, a second switching element, an intermediate capacitor, and a controller configured to control the first switching element and the second switching element, are included.

公开(公告)号：US20160329846A1

公开(公告)日：2016-11-10

申请号：US14902039

申请日：2014-07-02

Applicant: MITSUBISHI ELECTRIC CORPORATION

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

IPC: H02P6/28 ,  F24F7/007 ,  F25B31/02 ,  H02M1/34 ,  H02P27/06

CPC classification number: H02P6/28 ,  F24F7/007 ,  F25B31/02 ,  H02M1/34 ,  H02M1/4225 ,  H02M3/158 ,  H02M7/003 ,  H02M2001/0051 ,  H02M2001/342 ,  H02P27/06 ,  Y02B70/126 ,  Y02B70/1491

Abstract: 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.

Abstract translation: 防回流装置包括连接在电源和负载之间并且防止电流从负载侧向电源侧向后流动的防回流元件，以及进行用于使电力的电力的换向操作的换向装置 电流流向与防回流元件并联连接的换向路径。 包括构成换向装置的元件中的至少一个以上的多个元件被构造为模块，使得例如可以减小该装置的尺寸。 此外，可以实现简化的散热设计和简化的风道设计。

公开(公告)号：US20160126854A1

公开(公告)日：2016-05-05

申请号：US14897250

申请日：2013-09-30

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Kenta YUASA ,  Shinsaku KUSUBE ,  Akihiro TSUMURA ,  Takuya SHIMOMUGI

IPC: H02M5/458 ,  F25B31/02 ,  H02P27/06 ,  H02M7/06 ,  H02M1/32

CPC classification number: H02M5/458 ,  F24F11/30 ,  F25B31/02 ,  H02M1/32 ,  H02M1/4225 ,  H02M7/06 ,  H02M2001/007 ,  H02P27/06 ,  Y02B70/126

Abstract: A power conversion apparatus includes a rectifier, a converter including a reactor, a switching element, and a reverse current prevention element, a smoothing capacitor configured to smooth the output voltage, a current detector configured to detect a reactor current, a voltage detector configured to detect the output voltage, and a converter control unit configured to control operation of the switching element of the converter. The converter-control unit includes a switching command calculation unit configured to calculate a switching command value responsive to a ratio of the rectified voltage to the output voltage in accordance with the output voltage and the reactor current, a switching control unit configured to control operation of the switching element in accordance with the switching command value, and a supply abnormality determination unit configured to determine occurrence of a momentary power failure or voltage sag in accordance with the switching command value.

Abstract translation: 电力转换装置包括整流器，包括电抗器，开关元件和反向电流防止元件的转换器，被配置为平滑输出电压的平滑电容器，被配置为检测电抗器电流的电流检测器，配置为 检测输出电压，以及转换器控制单元，被配置为控制转换器的开关元件的操作。 转换器控制单元包括切换命令计算单元，被配置为根据输出电压和电抗器电流来计算响应于整流电压与输出电压的比率的开关指令值;开关控制单元，被配置为控制 所述开关元件根据所述开关指令值，以及供给异常判定单元，其被配置为根据所述切换命令值来确定瞬时停电或电压骤降的发生。