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公开(公告)号：US12152947B2
公开(公告)日：2024-11-26
申请号：US17563775
申请日：2021-12-28
Applicant: Delta Electronics, Inc.
Inventor： Cheng-Te Li , Chih-Yuan Chuang , Yen-Hsun Chen
Abstract: A temperature detection device includes plural thermistors, a voltage source and plural temperature detection circuits. The first terminals of the thermistors are electrically connected with a common node. The voltage source is electrically connected with the common node directly. Each temperature detection circuit includes a voltage divider and a differential amplifier circuit. The voltage divider includes a first resistor and a second resistor. A first terminal of the first resistor is connected with the common node. A second terminal of the first resistor is connected with a first terminal of the second resistor and the second terminal of the corresponding thermistor. The second terminal of the second resistor is electrically connected with a ground terminal. The differential amplifier circuit includes a first input terminal connected with the first terminal of the first resistor, a second input terminal connected with the second terminal of the first resistor, and an output terminal.
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公开(公告)号：US12244214B2
公开(公告)日：2025-03-04
申请号：US17714841
申请日：2022-04-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Cheng-Te Li , Nian-Ci Chen , Chih-Yuan Chuang , Cheng-Hao Hsueh
Abstract: An AC-DC conversion circuit provides a three-phase power source. The AC-DC conversion circuit includes a first inductor, a second inductor, a third inductor, a switch bridge arm assembly, and a control unit. The switch bridge arm assembly includes three switch bridge arms, and each switch bridge arm includes an upper switch and a lower switch. A plurality of common-connected nodes between the upper switches and the lower switches are coupled to the three-phase power source through the first inductor, the second inductor, and the third inductor. The control unit turns on the upper switch and the lower switch to provide a current detection loop. The control unit acquires a magnitude of a first current flowing through the first inductor and a magnitude of a third current flowing through the third inductor, and determines whether a current detection mechanism of the first current and the third current is normal.
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公开(公告)号：US11569754B2
公开(公告)日：2023-01-31
申请号：US17570065
申请日：2022-01-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Cheng-Te Li , Chih-Yuan Chuang
Abstract: A single-phase and three-phase compatible AC-DC conversion circuit includes a first switching component, a second switching component, a third switching component, three switch bridge arms, a fourth switching component, a pre-charge resistor, a capacitor assembly, and a control unit. Each switch bridge arm has an upper switch and a lower switch connected in series. The fourth switching component is coupled between a first phase of a three-phase power source and a common-connected node of the switch bridge arm corresponding to a second phase of the three-phase power source. The control unit turns on the fourth switching component, turns on the upper switch coupled to the first switching component, and turns on the lower switch coupled to the fourth switching component to provide a discharge path so that the capacitor assembly discharges through the pre-charge resistor on the discharge path.
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公开(公告)号：US20220390291A1
公开(公告)日：2022-12-08
申请号：US17563775
申请日：2021-12-28
Applicant: Delta Electronics, Inc.
Inventor： Cheng-Te Li , Chih-Yuan Chuang , Yen-Hsun Chen
Abstract: A temperature detection device includes plural thermistors, a voltage source and plural temperature detection circuits. The first terminals of the thermistors are electrically connected with a common node. The voltage source is electrically connected with the common node directly. Each temperature detection circuit includes a voltage divider and a differential amplifier circuit. The voltage divider includes a first resistor and a second resistor. A first terminal of the first resistor is connected with the common node. A second terminal of the first resistor is connected with a first terminal of the second resistor and the second terminal of the corresponding thermistor. The second terminal of the second resistor is electrically connected with a ground terminal. The differential amplifier circuit includes a first input terminal connected with the first terminal of the first resistor, a second input terminal connected with the second terminal of the first resistor, and an output terminal.
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