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    AIR CONDITIONER AND CONTROL METHOD FOR AIR CONDITIONER
    1.
    发明公开
    AIR CONDITIONER AND CONTROL METHOD FOR AIR CONDITIONER 审中-实审

    公开(公告)号：EP4407245A1

    公开(公告)日：2024-07-31

    申请号：EP22872120.5

    申请日：2022-09-23

    申请人： Hisense (Guangdong) Air Conditioning Co., Ltd.

    发明人： LI, Xidong

    IPC分类号： F24F11/30 ,  F24F11/56 ,  F24F11/64 ,  F24F11/65 ,  F24F11/70 ,  F24F11/88 ,  H02M1/42 ,  H02H3/087 ,  H02H1/00

    CPC分类号： F24F11/30 ,  F24F11/56 ,  F24F11/70 ,  F24F11/64 ,  F24F11/65 ,  F24F11/88 ,  H02H1/00 ,  H02H3/087 ,  H02M1/42

    摘要： Some embodiments of the present disclosure provide an air conditioner, comprising a power supply circuit, a first sampling circuit, and a controller. The controller is connected to the power supply circuit and the first sampling circuit, and is configured to: acquire a preset operating current value of the air conditioner at each detection stage of at least one detection stage; control the air conditioner to operate using the preset operating current value of each detection stage of the at least one detection stage as a current value of the operating current, and acquire a bus voltage value of the corresponding detection stage; acquire at least two voltage differences according to the bus voltage value of each detection stage of the at least one detection stage; determine a target operating current of the air conditioner according to the at least two voltage difference values and a preset threshold; and control the air conditioner to operate using the target operating current as the operating current.

    CONTROL METHOD FOR DIRECT POWER CONVERSION DEVICE
    3.
    发明授权
    CONTROL METHOD FOR DIRECT POWER CONVERSION DEVICE 有权

    公开(公告)号：EP3051684B1

    公开(公告)日：2018-10-10

    申请号：EP14847204.6

    申请日：2014-08-27

    申请人： Daikin Industries, Ltd.

    发明人： SAKAKIBARA Kenichi

    IPC分类号： H02M1/42 ,  H02M5/458 ,  H02M7/48 ,  H02P27/06

    CPC分类号： H02M5/458 ,  H02J7/345 ,  H02M1/42 ,  H02M1/4225 ,  H02M7/48 ,  H02P27/06 ,  H02P2201/09 ,  Y02B40/90 ,  Y02B70/126

    摘要： A converter (3) performs full-wave rectification on a single-phase voltage (Vin), thus outputting a rectified voltage (Vrec) across DC power supply lines (LL, LH). An inverter (5) receives the rectified voltage (Vrec) and then supplies a three-phase AC current (Iu, Iv, Iw) to an inductive load (6). Between the DC power supply lines (LL, LH) is connected a charge and discharge circuit (4). The charge and discharge circuit (4) includes a buffer circuit (4a) and a boost circuit (4b). The buffer circuit (4a) includes a series connection between a capacitor (C4) and a switch (Sc). The boost circuit (4b), which may be configured by a boost chopper, includes a switch (S1), a reactor (L4) and a diode (D40). The charge and discharge circuit (4) provides and receives part of pulsations of the power input to the converter (3) between the DC power supply lines (LL, LH).

    POWER INVERTER AND POWER INVERTING METHOD
    4.
    发明公开
    POWER INVERTER AND POWER INVERTING METHOD 审中-公开

    公开(公告)号：EP3376661A1

    公开(公告)日：2018-09-19

    申请号：EP18153028.8

    申请日：2018-01-23

    申请人： Delta Electronics, Inc.

    发明人： HSIN, Wei-Lun ,  LIN, Xin-Hung

    IPC分类号： H02M7/483 ,  H02M7/487

    CPC分类号： H02M7/5387 ,  H02M1/42 ,  H02M7/483 ,  H02M7/487

    摘要： A power inverter (100) includes a plurality of bridge arms (120a, 120b, 120c) and a plurality of switching circuits (140a, 140b, 140c). The bridge arms are electrically coupled to a first and a second dc node (N1, N2) and a neutral point node (Nn), and respectively coupled to a corresponding one of a plurality of ac output nodes (Na, Nb, Nc) to provide an ac output voltage (Va, Vb, Vc) and output current (Ia, Ib, Ic) via the ac output node. The switching circuits are respectively coupled between a corresponding one of the ac output nodes and the neutral point node. Each of the switching circuits includes a first transistor (Q1a, Q1b, Q1c), a second transistor (Q2a, Q2b, Q2c), a first diode (D1a, D1b, D1c) and a second diode (D2a, D2b, D2c). The first and the second transistors are coupled in series to each other. The first and the second diodes are electrically coupled in inverse-parallel to the first and the second transistors respectively.

    RESISTORLESS PRECHARGING
    5.
    发明公开
    RESISTORLESS PRECHARGING 审中-公开

    公开(公告)号：EP3349343A1

    公开(公告)日：2018-07-18

    申请号：EP18154487.5

    申请日：2013-11-08

    申请人： DET International Holding Limited

    发明人： HUFNAGEL, Michael ,  SCHAFMEISTER, Frank

    IPC分类号： H02M1/42 ,  H02M1/32 ,  H02M1/36 ,  H02M7/12

    CPC分类号： H02M1/42 ,  H02M1/081 ,  H02M1/32 ,  H02M1/36 ,  H02M1/4225 ,  H02M1/4233 ,  H02M7/12 ,  H02M7/125 ,  H02M7/145 ,  Y02B70/126

    摘要： A boost PFC converter (11) includes a rectifier (12), a converter (13) and an output stage comprising an output capacitor (6) where the DC output voltage (7) is provided across the output capacitor (6). The rectifier includes four rectifying elements connected in a full bridge configuration where the upper two of these four rectifying elements are thyristors (9.1, 9.2) and where the lower two are diodes (9.3, 9.4). In that the thyristors (9.1, 9.2) are controlled such as to be open for only a part of each half period of the input voltage, the amount of current per half period that is passed to the output capacitor (6) is controllable and can be made very small. Accordingly, the charge current for precharging the output capacitor (6) can be controllably limited such that a bulky precharge resistor is not required anymore to avoid high inrush currents.

    POWER CONVERSION DEVICE
    6.
    发明公开
    POWER CONVERSION DEVICE 审中-公开

    公开(公告)号：EP3200337A4

    公开(公告)日：2018-05-30

    申请号：EP15843810

    申请日：2015-09-24

    申请人： DAIKIN IND LTD

    发明人： SAKAKIBARA KENICHI

    IPC分类号： H02M7/12 ,  F03G7/08 ,  H02J3/36 ,  H02J7/34 ,  H02M1/42 ,  H02M5/458 ,  H02M7/48

    CPC分类号： H02M7/48 ,  F03G7/08 ,  H02J3/36 ,  H02M1/42 ,  H02M1/4225 ,  H02M5/458 ,  H02M7/12 ,  H02P2201/09

    摘要： An object is to provide a technique for increasing the voltage across a DC link without increasing the power covered by a power buffer circuit. A discharge duty (dc) that is a duty at which a switch (Sc) is conductive takes a value ((Vm/Vc)cos 2 (Ét)) obtained by dividing a product of a crest value (Vm) of a single-phase AC voltage (Vin) and a square (cos 2 (Ét)) of a cosine value of a phase (Ét) of the single-phase AC voltage (Vin) by a both-end voltage (Vc) across a capacitor (C4). A sum of a product of a rectifying duty (drec) that is a duty at which a converter (3) is conductive and a rectified voltage (Vrec) output from the converter (3) and a product of the both-end voltage (Vc) and the discharge duty (dc) varies in a period that is a half of the period of the single-phase AC voltage (Vin).

    REACTIVE POWER COMPENSATION SYSTEM AND METHOD THEREOF
    8.
    发明公开
    REACTIVE POWER COMPENSATION SYSTEM AND METHOD THEREOF 审中-公开
    无功功率补偿系统及其方法

    公开(公告)号：EP3255748A1

    公开(公告)日：2017-12-13

    申请号：EP17157156.5

    申请日：2017-02-21

    申请人： LSIS Co., Ltd.

    发明人： CHOI, Yong-Kil

    IPC分类号： H02J3/18

    CPC分类号： H02M1/42 ,  G01R25/00 ,  H02J3/01 ,  H02J3/1864 ,  Y02E40/12 ,  Y02E40/30 ,  Y02E40/40 ,  Y02P80/112

    摘要： The present disclosure relates a reactive power compensation system including a detection unit (41) for acquiring loading state information of a plurality of loads (21a, 21b, 21c, 23a, 23b, 23c), a reactive power compensation unit (30) for compensating reactive power, and a controller (45) for controlling the reactive power compensation unit to perform flicker compensation or power factor compensation based on a control signal according to the loading state information.

    摘要翻译： 本发明涉及一种无功功率补偿系统，包括：用于获取多个负载（21a，21b，21c，23a，23b，23c）的负载状态信息的检测单元（41）;无功功率补偿单元（30），用于补偿 无功功率;以及控制器（45），用于根据负载状态信息基于控制信号控制无功功率补偿单元执行闪烁补偿或功率因数补偿。

    SECONDARY CONTROL METHOD AND APPARATUS OF PARALLEL INVERTERS IN MICRO GRID
    9.
    发明公开
    SECONDARY CONTROL METHOD AND APPARATUS OF PARALLEL INVERTERS IN MICRO GRID 审中-公开
    微网格中并联逆变器的二次控制方法及装置

    公开(公告)号：EP3217507A1

    公开(公告)日：2017-09-13

    申请号：EP17160092.7

    申请日：2017-03-09

    申请人： Delta Electronics (Shanghai) Co., Ltd.

    发明人： LIU, Jinjun ,  WU, Teng ,  LIU, Zeng ,  WANG, Shike ,  LIU, Baojin ,  TAO, Yong

    IPC分类号： H02J3/38 ,  H02J3/46

    CPC分类号： H02M7/537 ,  H02J3/381 ,  H02J3/46 ,  H02M1/42 ,  Y02P80/14

    摘要： The present invention discloses a secondary control method and apparatus of parallel inverters in a micro grid, comprising: generating frequency and amplitude of fundamental voltage in the voltage instruction of inverter by droop control according to output voltage and output current of inverter to obtain a fundamental voltage instruction value; extracting voltage values and current values of a first and second AC signals from output voltage and output current of inverter, generating frequency instruction values of the first and second AC signals by droop control to obtain voltage instruction values of the first and second AC signals; regulating the output voltage of inverter according to the voltage instruction value of the first AC signal, the voltage instruction value of the second AC signal and the fundamental voltage instruction value.

    摘要翻译： 本发明公开了一种微电网并联逆变器的二次控制方法和装置，包括：根据逆变器的输出电压和输出电流，通过下垂控制在逆变器的电压指令中产生基波电压的频率和幅值，以获得基波电压 指令值; 从逆变器的输出电压和输出电流中提取第一和第二交流信号的电压值和电流值，通过下垂控制生成第一和第二交流信号的频率指令值，以获得第一和第二交流信号的电压指令值; 根据第一交流信号的电压指令值，第二交流信号的电压指令值和基波电压指令值对逆变器的输出电压进行调节。