公开(公告)号：US11293984B2

公开(公告)日：2022-04-05

申请号：US17037405

申请日：2020-09-29

申请人： Delta Electronics, Inc.

发明人： Jen-Chuan Liao ,  Yu-Rong Chen ,  Kuan-Tse Lin ,  Hung-Hsien Huang

IPC分类号： H02J9/06 ,  G01R31/327

摘要： A detection circuit is electrically connected with a static transfer switch. The static transfer switch includes a silicon controlled rectifier. The detection circuit includes a high-pass filter, a low-pass filter, an absolute value circuit and a determination unit. After the high-pass filter filters off a low-frequency component of a terminal voltage between the first terminal and the second terminal of the static transfer switch, a first signal is generated. After a high-frequency component of the first signal is filtered off by the low-pass filter, a second signal is generated. The second signal is converted into an absolute value signal by the absolute value circuit. If no pulse signals are contained in the absolute value signal, the determination unit determines that the static transfer switch is in an abnormal on condition.

公开(公告)号：US12132348B2

公开(公告)日：2024-10-29

申请号：US18164488

申请日：2023-02-03

申请人： DELTA ELECTRONICS, INC.

发明人： Jen-Chuan Liao ,  Chien-Chih Chan ,  Jia-Cheng Sie

IPC分类号： H02J9/06 ,  G01R31/40 ,  G01R33/02

CPC分类号： H02J9/068 ,  G01R31/40 ,  G01R33/02

摘要： A dual power switching system includes a first STS, a second STS, an inductive device, and a controller. The first STS is electrically coupled to a main power source, and the second STS is electrically coupled to a backup power source. When detecting that the main power source is abnormal, the controller detects a residual magnetic flux of the inductive device and calculates a magnetic flux difference between the predicted magnetic flux and the residual magnetic flux. When determining that an absolute value of the magnetic flux difference is less than or equal to a magnetic flux deviation value, the controller determines whether the output power meets a forced commutation condition. When determining that the output power meets the forced commutation condition, the controller turns on the second STS so that the first STS is forcibly turned off by the backup power source through the second STS.

公开(公告)号：US11754638B2

公开(公告)日：2023-09-12

申请号：US17528837

申请日：2021-11-17

申请人： DELTA ELECTRONICS, INC.

发明人： Hung-Chieh Lin ,  Jen-Chuan Liao ,  Yi-Ping Hsieh ,  Hsin-Chih Chen

IPC分类号： G01R31/52 ,  H02J9/06

CPC分类号： G01R31/52 ,  H02J9/061

摘要： A ground fault detection apparatus is used to detect a ground fault of a three-phase UPS apparatus. The UPS apparatus includes a first filter circuit, an AC/DC conversion circuit, a DC bus, a DC/AC conversion circuit, and a second filter circuit coupled in sequence. The ground fault detection apparatus includes a detection circuit having a first detection end and a second detection end. The first detection end is coupled to the first filter circuit and the second filter circuit, and the second detection end is coupled to an equipment grounding point. The equipment grounding point is coupled to a neutral point of a three-phase power source, and the three-phase power source is coupled to the first filter circuit. The detection circuit indicates whether the UPS apparatus has a ground fault and a location where the ground fault occurs according to a detection voltage between the first detection end and the second detection end.

公开(公告)号：US20210318380A1

公开(公告)日：2021-10-14

申请号：US17037405

申请日：2020-09-29

申请人： Delta Electronics, Inc.

发明人： Jen-Chuan Liao ,  Yu-Rong Chen ,  Kuan-Tse Lin ,  Hung-Hsien Huang

IPC分类号： G01R31/327 ,  H02J9/06

摘要： A detection circuit is electrically connected with a static transfer switch. The static transfer switch includes a silicon controlled rectifier. The detection circuit includes a high-pass filter, a low-pass filter, an absolute value circuit and a determination unit. After the high-pass filter filters off a low-frequency component of a terminal voltage between the first terminal and the second terminal of the static transfer switch, a first signal is generated. After a high-frequency component of the first signal is filtered off by the low-pass filter, a second signal is generated. The second signal is converted into an absolute value signal by the absolute value circuit. If no pulse signals are contained in the absolute value signal, the determination unit determines that the static transfer switch is in an abnormal on condition.