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公开(公告)号：EP3678296A1
公开(公告)日：2020-07-08
申请号：EP19190357.4
申请日：2019-08-06
发明人： LIU, Teng , QIAO, Lifeng , ZHANG, Dehui , YING, JianPing
IPC分类号： H03K17/691 , H02H7/26
摘要： Disclosed is a circuit breaker apparatus, including a first switching assembly, a first controller, a second switching assembly and a second controller. The first switching assembly is connected in series between a positive pole of a power supply and a load. The first switching assembly includes multiple first switching units in series. The first controller is electrically connected to a first pre-set reference potential of the first switching assembly. The first controller is electromagnetically coupled with each first switching unit through a first transformer unit. The second switching assembly is connected in series between a negative pole of the power supply and the load. The second switching assembly includes multiple second switching units in series. The second controller is electrically connected to a second pre-set reference potential of the second switching assembly. The second controller is electromagnetically coupled with each second switching unit through a second transformer unit.
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公开(公告)号：EP3916975A3
公开(公告)日：2022-01-19
申请号：EP21171009.0
申请日：2021-04-28
发明人： LIU, Teng , YING, Jianping , QIAO, Lifeng , WANG, Xin , XIAO, Hongwei
IPC分类号： H02M1/00 , H02M1/088 , H02M3/00 , H02M3/335 , H02M5/458 , H02M7/08 , H02M7/23 , H02M7/48 , H02M7/487 , H02M7/493
摘要： Embodiments of the present invention provide a conversion device connected between an alternating current (AC) power grid and a load, wherein the conversion device comprises: an inductor electrically connected to the AC power grid; a first-stage converter having a first terminal electrically connected to the inductor and a second terminal electrically connected to a bus, and the first-stage converter being configured to output a bus voltage according to the AC power grid, wherein the first-stage converter comprises an N-level alternating current-direct current (AC-DC) converter, and the N-level AC-DC converter comprises a plurality of switch bridge arms, wherein both an upper bridge arm and a lower bridge arm of each of the plurality of switch bridge arms of the N-level AC-DC converter include a plurality of semiconductor devices connected in series, and a rated withstand voltage Vsemi of each of the semiconductor devices is greater than or equal to (Vbus ∗ δ)/((N-1) ∗ Nseries ∗ λ); and a second-stage converter having a first terminal electrically connected to the bus and a second terminal electrically connected to the load, and the second-stage converter being configured to convert the bus voltage into an output voltage to supply energy to the load. The technical solution of the present invention can reduce size and cost of the conversion device.
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公开(公告)号：EP3916980A1
公开(公告)日：2021-12-01
申请号：EP21170736.9
申请日：2021-04-27
发明人： LIU, Teng , YING, Jianping , QIAO, Lifeng , WANG, Xin , XIAO, Hongwei
摘要： A conversion device includes: an inductor (Lf) electrically connected to a AC power grid; a first-stage converter (302) configured to output a bus voltage based on the AC power grid; a second-stage converter (303) configured to convert the bus voltage into an output voltage to the load; and a filtering network, wherein a first resistance-capacitance circuit is disposed between the first and third terminals of the filtering network, a second resistance-capacitance circuit is disposed between the second and third terminals of the filtering network, the first terminal of the filtering network is electrically connected to the AC power grid, the second terminal of the filtering network is electrically connected to the bus or the second terminal of the second-stage converter, and the third terminal of the filtering network is grounded through a first capacitor.
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公开(公告)号：EP4207574A1
公开(公告)日：2023-07-05
申请号：EP22217360.1
申请日：2022-12-30
发明人： QIAO, Lifeng , LOU, Dehai , LIU, Teng , YING, Jianping , DAI, Zhiqiang
摘要： A power converter includes a PCB (1) having opposing first and second sides (11, 12), and a plurality of first commutation units and first capacitor unit disposed on the PCB. Each first commutation unit includes first and second discrete component (Q1, Q2). The second end of the first discrete component (Q1) is electrically coupled to the first end of the second discrete component (Q2), and the first capacitor unit (Ca) is electrically coupled to the first ends of the first discrete components (Q1) and the second ends of the second discrete components (Q2) in the plurality of first commutation units, respectively. The first and second discrete components (Q1, Q2) in the plurality of first commutation units are arranged in a row. The first and second discrete components (Q1, Q2) in each first commutation unit form a commutation loop together with the first capacitor unit (Ca).
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公开(公告)号：EP3916975A2
公开(公告)日：2021-12-01
申请号：EP21171009.0
申请日：2021-04-28
发明人： LIU, Teng , YING, Jianping , QIAO, Lifeng , WANG, Xin , XIAO, Hongwei
IPC分类号： H02M1/00 , H02M1/088 , H02M3/00 , H02M3/335 , H02M5/458 , H02M7/08 , H02M7/23 , H02M7/48 , H02M7/487 , H02M7/493
摘要： Embodiments of the present invention provide a conversion device connected between an alternating current (AC) power grid and a load, wherein the conversion device comprises: an inductor electrically connected to the AC power grid; a first-stage converter having a first terminal electrically connected to the inductor and a second terminal electrically connected to a bus, and the first-stage converter being configured to output a bus voltage according to the AC power grid, wherein the first-stage converter comprises an N-level alternating current-direct current (AC-DC) converter, and the N-level AC-DC converter comprises a plurality of switch bridge arms, wherein both an upper bridge arm and a lower bridge arm of each of the plurality of switch bridge arms of the N-level AC-DC converter include a plurality of semiconductor devices connected in series, and a rated withstand voltage Vsemi of each of the semiconductor devices is greater than or equal to (Vbus ∗ δ)/((N-1) ∗ Nseries ∗ λ); and a second-stage converter having a first terminal electrically connected to the bus and a second terminal electrically connected to the load, and the second-stage converter being configured to convert the bus voltage into an output voltage to supply energy to the load. The technical solution of the present invention can reduce size and cost of the conversion device.
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公开(公告)号：EP3687018A1
公开(公告)日：2020-07-29
申请号：EP19204797.5
申请日：2019-10-23
发明人： YING, JianPing , LI, Wuying , QIAO, Lifeng , LIU, Teng
IPC分类号： H02H9/04
摘要： Disclosed is a surge control circuit, including: an absorption circuit including an absorption element and a bypass switch which are connected in series, a switch group connected in parallel to both ends of the absorption circuit and a first control circuit electrically connected to the switch group and bypass switch respectively. Normally, the first control circuit controls the switch group and the bypass switch to turn on simultaneously, makes the current flow through the switch group; when detecting the current is greater than or equal to the first preset current value, or the current increase rate is greater than or equal to the preset current rate of change, the first control circuit controls the switch group to turn off, makes the current flow through the absorption circuit; when detecting the current is less than the second preset current value, the first control circuit controls the bypass switch to turn off.
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