公开(公告)号：US20230155368A1

公开(公告)日：2023-05-18

申请号：US17525284

申请日：2021-11-12

Applicant: ABB Schweiz AG

Inventor： Yu Du ,  Christopher Alan Belcastro ,  Waqas Mahmood Arshad

IPC: H02H3/10 ,  H01H47/22 ,  H02H1/00 ,  H02H5/04 ,  H03K17/687

CPC classification number: H02H3/10 ,  H01H47/22 ,  H02H1/0007 ,  H02H5/047 ,  H03K17/687

Abstract: In one aspect, a modular static transfer switch is provided. The module static transfer switch includes an output configured to couple to a load, a first input configured to couple to a first power source, and a second input configured to couple to a second power source. The modular static transfer switch further includes a plurality of sold-state switch modules each comprising at least one solid-state switch. A first plurality of the solid-state switch modules are coupled in parallel between the first input and the output, each configured to selectively couple the first power source to the output using the at least one solid-state switch. A second plurality of the solid-state switch modules are coupled in parallel between the second input and the output, each configured to selectively couple the second power source to the output using the at least one solid-state switch.

公开(公告)号：US11588483B1

公开(公告)日：2023-02-21

申请号：US17580399

申请日：2022-01-20

Applicant: ABB Schweiz AG

Inventor： Xiaoqing Song ,  Yu Du ,  Yuzhi Zhang ,  Harshang Shah

IPC: H03K17/72 ,  H03K17/567

Abstract: In one aspect, a quasi-resonant turn-off circuit is provided. The quasi-resonant turn-off circuit is couplable in parallel with a pair of anti-parallel thyristors. The quasi-resonant turn-off circuit includes a resonant capacitor and an energy recovery circuit. The resonant capacitor is configured to supply a charge to the pair of anti-parallel thyristors to decrease a turn-off time of the pair of anti-parallel thyristors. The energy recovery circuit is configured to recharge the resonant capacitor using remnant energy left in parasitic inductances coupled to the quasi-resonant turn-off circuit after the pair of anti-parallel thyristors is off.

公开(公告)号：US20220247167A1

公开(公告)日：2022-08-04

申请号：US17167290

申请日：2021-02-04

Applicant: ABB Schweiz AG

Inventor： Xiaoqing Song ,  Yu Du ,  Yuzhi Zhang

IPC: H02H9/00 ,  H02H1/00

Abstract: A method includes energizing a transformer from a deenergized state by turning on a solid-state transfer switch to conductively couple a power source on a first side of the solid-state transfer switch and a transformer on a second side of the solid-state transfer switch, and evaluating an inrush current to the transformer from the power source. The method includes turning off the solid-state transfer switch to conductively decouple the power source and the transformer in response to the inrush current meeting a first criterion, determining a recoupling timing for the solid-state transfer switch, and turning on the solid-state transfer switch in response to the recoupling timing effective to complete energization of the transformer with the inrush current to the transformer being limited by the first criterion.

公开(公告)号：US20210028621A1

公开(公告)日：2021-01-28

申请号：US16521694

申请日：2019-07-25

Applicant: ABB Schweiz AG

Inventor： Adil Oudrhiri ,  Yu Du ,  Yuzhi Zhang ,  Xiaoqing Song

IPC: H02J3/00 ,  H02J9/06 ,  H02J7/34

Abstract: A static transfer switch is provided for supplying power to a load alternately from two different power sources. Switching between the two power sources may occur within a fraction of one electrical cycle. In response to sensing degraded performance in the power source supplying the load, a gate signal is turned off to a first switch coupled between the power source and the load. A third switch coupled between an energy storage and the first switch is also closed to release a current to the input or output of the first switch The current forces a drop in current conducted through the first switch and causes the first switch to open and stop conducting current. A second switch coupled between the alternate power source and the load is then closed to supply power to the load from the alternate power source.

公开(公告)号：US20230208416A1

公开(公告)日：2023-06-29

申请号：US17560551

申请日：2021-12-23

Applicant: ABB Schweiz AG

Inventor： Xiaoqing Song ,  Yuzhi Zhang ,  Thomas Kendzia, III ,  Yu Du

IPC: H03K17/13 ,  H03K17/06 ,  H03K17/04 ,  H03K17/60

CPC classification number: H03K17/136 ,  H03K17/06 ,  H03K17/0403 ,  H03K17/60

Abstract: In one aspect, a solid-state switching apparatus is provided that includes a pair of anti-parallel thyristors, a quasi-resonant turn-off circuit, a sensor, and a control circuit. The turn-off circuit is coupled in parallel with the pair of anti-parallel thyristors and includes a first selectively conductive path and a second selectively conductive path. The sensor is configured to sense a thyristor current conducted by at least one of the pair of anti-parallel thyristors. The control circuit is configured to receive the sensed thyristor current from the sensor and determine a magnitude of the sensed thyristor current and a polarity of the sensed thyristor current. The control circuit is further configured to activate, in response to determining that the magnitude is greater than a threshold value, one of the first selectively conductive path and the second selectively conductive path based on the polarity to commutate and interrupt the thyristor current.

公开(公告)号：US20230187963A1

公开(公告)日：2023-06-15

申请号：US17548829

申请日：2021-12-13

Applicant: ABB Schweiz AG

Inventor： Yuzhi Zhang ,  Yu Du ,  Xiaoqing Song ,  Harish Suryanarayana ,  Veerakumar Bose ,  Thomas Anthony Kendzia, III ,  Harshang Shah ,  Christopher Alan Belcastro

IPC: H02J9/06 ,  H02J7/00

CPC classification number: H02J9/06 ,  H02J7/0047 ,  H02J7/00712

Abstract: A method of operating a static transfer switch is provided. The method includes monitoring a voltage waveform for each phase of first and second power sources, and calculating flux for each phase of the power sources. The method also includes determining (i) a first flux difference between the respective flux of the first phases of the first and second power sources, (ii) a second flux difference between the respective flux of the second phases of the first and second power sources, and (iii) a third flux difference between the respective flux of the third phases of the first and second power sources. The method further includes turning off a third solid-state switch to disconnect the third phase of the first power source from a load, in response to the controller determining that the third flux difference is greater the first and second flux differences.

公开(公告)号：US20210391782A1

公开(公告)日：2021-12-16

申请号：US16899217

申请日：2020-06-11

Applicant: ABB Schweiz AG

Inventor： Yuxiang Shi ,  Yu Du ,  Eddy Aeloiza

IPC: H02M1/15 ,  H02M1/08 ,  H02M7/537

Abstract: A soft switching resonant converter is disclosed. The converter includes a power switch operable to connect and disconnect a DC link rail node and an output node. A resonant capacitor is coupled with the power switch. An auxiliary leg is coupled with a DC link midpoint node and the output node. An active damper is coupled in series with the resonant capacitor and the output node and is controllable to provide a first resistance of the active damper in a first state and a second resistance of the active damper in a second state, the first resistance having a lower magnitude than the second resistance. A driver controls the damper switch to provide a first resistance during the soft switching operation of the power switch and a second resistance after the soft switching operation of the power switch.

公开(公告)号：US20210143630A1

公开(公告)日：2021-05-13

申请号：US16682300

申请日：2019-11-13

Applicant: ABB Schweiz AG

Inventor： Yu Du ,  Li Qi ,  Tong Wu

IPC: H02H5/04 ,  H02J7/00

Abstract: According to one aspect of the present disclosure, an energy storage system includes one or more power sources, one or more energy storage components, and one or more solid state circuit breakers disposed between the one or more power sources and the one or more energy storage components such that electrical power is exchanged between the one or more power sources to the one or more energy storage components through the one or more solid state circuit breakers. The energy storage system also includes a controller configured to operate the one or more solid state circuit breakers to control current exchanged with the one or more energy storage components and protect the one or more energy storage components from the one or more power sources during a fault condition.

公开(公告)号：US10903649B1

公开(公告)日：2021-01-26

申请号：US16521694

申请日：2019-07-25

Applicant: ABB Schweiz AG

Inventor： Adil Oudrhiri ,  Yu Du ,  Yuzhi Zhang ,  Xiaoqing Song

IPC: H02J9/00 ,  H02J3/00 ,  H02J7/34 ,  H02J9/06

Abstract: A static transfer switch is provided for supplying power to a load alternately from two different power sources. Switching between the two power sources may occur within a fraction of one electrical cycle. In response to sensing degraded performance in the power source supplying the load, a gate signal is turned off to a first switch coupled between the power source and the load. A third switch coupled between an energy storage and the first switch is also closed to release a current to the input or output of the first switch The current forces a drop in current conducted through the first switch and causes the first switch to open and stop conducting current. A second switch coupled between the alternate power source and the load is then closed to supply power to the load from the alternate power source.

公开(公告)号：US20180277993A1

公开(公告)日：2018-09-27

申请号：US15762107

申请日：2015-09-24

Applicant: ABB Schweiz AG

Inventor： Zhiguo Pan ,  Yu Du ,  Emanuele Borla ,  Rajib Mikail ,  Hongrae Kim

IPC: H01R13/635 ,  H01R13/14

CPC classification number: H01R13/635 ,  H01R13/14 ,  H01R13/502 ,  H01R13/6633 ,  H01R24/28 ,  H01R24/76 ,  H01R24/78 ,  H01R2103/00

Abstract: A sliding contact assembly for a DC electrical outlet receives plug contacts of an electrical plug. The assembly includes sliding contact structure having a base and a plurality of electrical sliding contacts fixed to the base. A housing includes a first end wall having an internal top surface and second end wall opposing the first end wall. The second end wall has an internal bottom surface. The housing has a side wall structure defining an internal chamber between the top surface and the bottom surface. The sliding contact structure is disposed in the housing to be movable linearly within the chamber. A spring is disposed between the top surface of the housing and a surface of the base so that when the plug contacts are completely disconnected from the associated sliding contacts, the spring rapidly forces the sliding contacts away from the plug contacts, reducing arcing energy there-between.