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1. 发明公开

EP4156490A1 POWER CONVERSION DEVICE 审中-实审
公开(公告)号：EP4156490A1
公开(公告)日：2023-03-29
申请号：EP20936338.1
申请日：2020-05-21
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： KAWAI, Yu , IZUMI, Kikuo
IPC分类号： H02M7/48
摘要： A power conversion device (100) includes an inverter (2) that receives an input voltage and generates an inverter voltage, a filter (3) that receives the inverter voltage and outputs an output voltage, a detector (4) that detects a DC component of the output voltage, a feedback controller (5) that receives an AC voltage command and the DC component and determines an inverter voltage command such that the DC component is equal to a target value, and a PWM controller (6) that receives the inverter voltage command and performs pulse width modulation control of the inverter (2). The target value is zero or a value corresponding to an offset error of the detector (4). The feedback controller (5) computes a compensation amount for compensating for the DC component and determines, as the inverter voltage command, the AC voltage command on which a product of an absolute value of a sine wave and the compensation amount is superimposed, the sine wave being synchronized with a period of the AC voltage command.

2. 发明公开

EP4142132A1 POWER SUPPLY SYSTEM 审中-实审
公开(公告)号：EP4142132A1
公开(公告)日：2023-03-01
申请号：EP20931863.3
申请日：2020-04-21
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： KATAOKA, Takuya , IZUMI, Kikuo , HIGAKI, Yusuke
IPC分类号： H02M3/00 , H02M7/12 , H02J1/00
摘要： A power supply system converts AC power from a main power source into DC power and outputs the DC power to a DC system (L). The power supply system includes a plurality of power conversion devices (10) connected in parallel with each other, a load state detector to detect an operating state of a load connected to the DC system (L), and a command generator (30) to generate a distribution voltage command Vref. Each of the power conversion devices (10) includes a DC voltage controller (212) to generate an output power command Pdc_ref based on a voltage of the DC system (L) and the distribution voltage command Vref, and an AC/DC converter (21) to convert AC power received from the main power source (2) based on the output power command Pdc_ref and output the converted power to the DC system (L). The command generator (30) generates the distribution voltage command Vref such that loss of the load connected to the DC system (L) is reduced, based on a detection result of the load state detector.

3. 发明公开

EP4071992A1 INSULATING TRANSFORMER AND POWER CONVERSION DEVICE EQUIPPED WITH SAME 审中-公开
公开(公告)号：EP4071992A1
公开(公告)日：2022-10-12
申请号：EP19954762.1
申请日：2019-12-05
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： ITOGAWA, Yuki , IZUMI, Kikuo , AMIMOTO, Takeshi , KAWAI, Yu , KIMURA, Tomoaki
IPC分类号： H02M3/28
摘要： An insulating transformer (3) includes a plurality of sub-insulating transformers (11 to 13) connected in series. Polarity directions of all sub-windings (14 to 19) are identical. When a current I flows from a first main terminal (3a) to a third main terminal (3c) through the first sub-winding (11), an interphase capacitance (C5), and the second sub-winding (17), excitation inductance of the first sub-winding and excitation inductance of the second sub-winding are configured to have opposite polarities.

4. 发明公开

EP3968478A1 DC POWER SUPPLY AND DISTRIBUTION SYSTEM 审中-公开
公开(公告)号：EP3968478A1
公开(公告)日：2022-03-16
申请号：EP19928413.4
申请日：2019-05-10
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： HIGAKI, Yusuke , IZUMI, Kikuo , JIMICHI, Takushi , TAKUNO, Tsuguhiro , KATAOKA, Takuya
IPC分类号： H02J1/00
摘要： The present DC power supply and distribution system includes a plurality of distribution lines (L1, L2) provided respectively corresponding to a plurality of loads (A1, A2), a first converter (4) to convert an AC voltage from a commercial AC power source (10) into a plurality of DC voltages (VA, VB) and supply the DC voltages respectively to the distribution lines, a second converter (7) to convert a DC power from a power generation and storage source (11) into a plurality of DC powers (P1, P2) and supply the DC powers respectively to the distribution lines, and a power controller (9A) to control the DC powers such that the efficiency of the first converter is increased, based on information related to the efficiency of the second converter.

5. 发明公开

EP4152588A1 DC POWER SUPPLYING AND DISTRIBUTING SYSTEM 审中-实审
公开(公告)号：EP4152588A1
公开(公告)日：2023-03-22
申请号：EP20934980.2
申请日：2020-05-15
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： HIGAKI, Yusuke , IZUMI, Kikuo , JIMICHI, Takushi , TAKUNO, Tsuguhiro , KATAOKA, Takuya , TSURUTA, Ryoji , ISHIBASHI, Takaharu
IPC分类号： H02M3/28 , H02J1/10
摘要： The present DC power supply and distribution system comprises: a plurality of power distribution lines (1, 2) each connected to a respective one of a plurality of loads (21, 22); a first converter (3) to receive an AC voltage from a commercial AC power source (23), convert the received AC voltage into a plurality of DC voltages (V2, V3) and supply each of the plurality of DC voltages to a respective one of the plurality of power distribution lines; a second converter (4) to receive a DC power from a power generating and/or storing source (24), convert the received DC power into a plurality of DC powers (P12, P13), and supply each of the plurality of DC powers to a respective one of the plurality of power distribution lines; and a controller (11) to enhance the second converter in efficiency by controlling the first converter so that a ratio (V2/V3) of the plurality of DC voltages is a predetermined first ratio (N3/N2).

6. 发明公开

EP3982529A1 POWER SUPPLY SYSTEM 审中-公开
公开(公告)号：EP3982529A1
公开(公告)日：2022-04-13
申请号：EP19931831.2
申请日：2019-06-05
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： KATAOKA, Takuya , IZUMI, Kikuo , HIGAKI, Yusuke , JIMICHI, Takushi , TAKUNO, Tsuguhiro
IPC分类号： H02M7/12 , H02J3/12
摘要： A power supply system (1) is a DC power supply and distribution system that converts AC power received from a main power source (2) into DC power and supplies the DC power to a load (3). The power supply system (1) includes a power converter (10), a load state detector (20), and a controller (30). The power converter (10) converts AC power received from the main power source (2) into DC power with a voltage in accordance with a distribution voltage command value Vref and supplies the DC power to the load (3). The load state detector (20) detects an operating state of the load (3). The controller (30) operates in an operation mode selected from among a plurality of operation modes and generates the distribution voltage command value Vref. The operation modes include a distribution voltage control mode in which the distribution voltage command value Vref is generated based on load operating information detected by the load state detector (20) and a distribution voltage fixed mode in which a predetermined setting value or an external command value acquired from an external device (4) is set as the distribution voltage command value Vref.

7. 发明公开

EP3886283A1 DC POWER SUPPLY AND DISTRIBUTION SYSTEM 审中-公开
公开(公告)号：EP3886283A1
公开(公告)日：2021-09-29
申请号：EP19886615.4
申请日：2019-10-25
申请人： Mitsubishi Electric Corporation
发明人： IZUMI, Kikuo , JIMICHI, Takushi , TAKUNO, Tsuguhiro , HIGAKI, Yusuke , KATAOKA, Takuya
IPC分类号： H02J1/00 , H02J7/00 , H02J7/35 , H02J13/00
摘要： A DC power supply and distribution systems are provided that convert an AC power input from AC power line to DC power with different voltages. The DC supply and distribution system (100) includes an AC-DC converter (40) for converting an AC power input from an AC power line (10) to DC powers having a plurality of different voltages and outputting the converted DC powers; and a voltage controller (41) for controlling the different voltages of the DC powers to be output from the AC-DC converter (40). The output DC powers are distributed to the plurality of loads (30) through a plurality of respective DC lines (1) connected from the output terminals (40B) of the AC-DC converter (40).

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