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Patent Agency Ranking
公开(公告)号：US09229034B2
公开(公告)日：2016-01-05
申请号：US14109217
申请日：2013-12-17
Applicant: Delta Electronics, Inc.
Inventor： Hua-Sheng Lin , Yung-Sheng Yeh
CPC classification number: G01R19/0092 , G01R15/18 , G01R19/2509 , H02M2001/0009
Abstract: A sampling circuit for current transformer includes a current sensing unit, a rectification unit, a sampling unit and a switching unit. The rectification unit is electrically connected to the current sensing unit. The sampling unit is electrically connected to the rectification unit and outputs a first signal. The sampling unit includes an energy leakage device and a switching device. The switching device is electrically connected to the energy leakage device in parallel, and is turned on or off according to a second signal and a third signal. The switching unit is electrically connected to the sampling unit, and is turned on or off according to the second signal.
Abstract translation: 电流互感器的采样电路包括电流检测单元，整流单元，采样单元和开关单元。 整流单元电连接到电流感测单元。 采样单元电连接到整流单元并输出第一信号。 采样单元包括能量泄漏装置和开关装置。 开关装置并联电连接到能量泄漏装置，并根据第二信号和第三信号而导通或关断。 开关单元电连接到采样单元，并根据第二信号导通或关断。
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公开(公告)号：US11777393B2
公开(公告)日：2023-10-03
申请号：US17534902
申请日：2021-11-24
Applicant: DELTA ELECTRONICS, INC.
Inventor： Yung-Sheng Yeh , Hsiang-Sheng Hung
CPC classification number: H02M1/0009 , H02M1/4208 , H02M3/33576
Abstract: A detection circuit is used to detect an input current of a switching power conversion circuit. The current detection circuit includes a current transform unit, a first unidirectional conduction component assembly, a flux reset circuit, a second unidirectional conduction component assembly, a first switch, a second switch, a control unit, and a detection unit. The current transform unit is coupled to a power switch of the switching power conversion circuit, and the first unidirectional conduction component assembly, the flux reset circuit, and the second unidirectional conduction component assembly are connected in parallel to the current transform unit. The first switch and the second switch are coupled to the first or second unidirectional conduction component assembly, and the control unit correspondingly controls the first switch and the second switch according to a first or second direction voltage of the input voltage.
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公开(公告)号：US12301104B2
公开(公告)日：2025-05-13
申请号：US18371371
申请日：2023-09-21
Applicant: Delta Electronics, Inc.
Inventor： Yung-Sheng Yeh , Chih-Wei Liang
Abstract: An ORing FET control circuit and method are provided. The circuit includes an ORing FET, a comparator, first, second and third resistors, a first capacitor, a diode and a driving unit. The positive and negative input terminals of the comparator are electrically connected to the input and output voltages. The first resistor, the second resistor, the first capacitor, and the third resistor are electrically connected in series between a reference voltage and a ground terminal sequentially. The reference voltage is lower than a voltage at the positive input terminal. When the input voltage is lower than the output voltage, if a voltage across the ORing FET is larger than a threshold, the comparator outputs a driving signal at low level, and correspondingly the driving unit turns off the ORing FET. The threshold depends on resistances of the first and second resistors.
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公开(公告)号：US20240113703A1
公开(公告)日：2024-04-04
申请号：US18371371
申请日：2023-09-21
Applicant: Delta Electronics, Inc.
Inventor： Yung-Sheng Yeh , Chih-Wei Liang
IPC: H03K17/06 , H03K17/041 , H03K17/30
CPC classification number: H03K17/063 , H03K17/04106 , H03K17/302
Abstract: An ORing FET control circuit and method are provided. The circuit includes an ORing FET, a comparator, first, second and third resistors, a first capacitor, a diode and a driving unit. The positive and negative input terminals of the comparator are electrically connected to the input and output voltages. The first resistor, the second resistor, the first capacitor, and the third resistor are electrically connected in series between a reference voltage and a ground terminal sequentially. The reference voltage is lower than a voltage at the positive input terminal. When the input voltage is lower than the output voltage, if a voltage across the ORing FET is larger than a threshold, the comparator outputs a driving signal at low level, and correspondingly the driving unit turns off the ORing FET. The threshold depends on resistances of the first and second resistors.
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公开(公告)号：US20240113617A1
公开(公告)日：2024-04-04
申请号：US18372010
申请日：2023-09-22
Applicant: Delta Electronics, Inc.
Inventor： Yung-Sheng Yeh , Chih-Wei Liang
CPC classification number: H02M1/4233 , H02M1/0085 , H02M1/081
Abstract: A totem-pole PFC circuit and a control method thereof are provided. The circuit includes an AC power source, first and second bridge arms and a controller. The first bridge arm includes first and second switches electrically connected in series with a connection node electrically connected to a first terminal of the AC power source. The second bridge arm includes third and fourth switches electrically connected in series with a connection node electrically connected to a second terminal of the AC power source. When a potential at the first terminal is higher than a potential at the second terminal, the controller turns off the fourth switch if the L-phase voltage is lower than a first threshold voltage. When the potential at the first terminal is lower than the potential at the second terminal, the controller turns off the third switch if the L-phase voltage is higher than a second threshold voltage.
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