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公开(公告)号：US11967898B2
公开(公告)日：2024-04-23
申请号：US17569885
申请日：2022-01-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Yi-Ping Hsieh , Jin-Zhong Huang , Hung-Yu Huang , Chih-Hsien Li , Ciao-Yin Pan
CPC classification number: H02M3/155 , H02M1/0058 , H02M3/158 , H02M7/53871 , H02M1/42 , H02M7/4815
Abstract: A soft-switching power converter includes a main switch, an energy-releasing switch, and an inductive coupled unit. The main switch is a controllable switch. The energy-releasing switch is coupled to the main switch. The inductive coupled unit is coupled to the main switch and the energy-releasing switch. The inductive coupled unit includes a first inductance, a second inductance coupled to the first inductance, and an auxiliary switch unit. The auxiliary switch unit is coupled to the second inductance to form a closed loop. The main switch and the energy-releasing switch are alternately turned on and turned off. The auxiliary switch unit is controlled to start turning on before the main switch is turned on so as to provide at least one current path.
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公开(公告)号：US11088629B2
公开(公告)日：2021-08-10
申请号：US16867242
申请日：2020-05-05
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Chao-Lung Kuo , Hung-Yu Huang , Chih-Hsien Li
IPC: H02M3/335
Abstract: An isolated converter with high boost ration includes a transformer, a first bridge arm, a second bridge arm, and a boost circuit. The transformer includes a secondary side having a secondary side first node and a secondary side second node. The first bridge arm includes a first diode and a second diode. The second bridge arm includes a third diode and a fourth diode. The boost circuit includes at least one fifth diode coupled between the first bridge arm and the secondary side second node, at least one sixth diode coupled between the second bridge arm and the secondary side first node, and at least two capacitors coupled to the secondary side first node and the secondary side second node.
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公开(公告)号：US11081968B2
公开(公告)日：2021-08-03
申请号：US16698764
申请日：2019-11-27
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Chao-Li Kao , Yi-Ping Hsieh , Jin-Zhong Huang , Chao-Lung Kuo , Hung-Yu Huang , Chih-Hsien Li
IPC: H02M3/335
Abstract: An isolated boost converter includes a transformer, a first bridge arm, a second bridge arm, and a boost circuit. The transformer includes a secondary side having a secondary side first contact and a secondary side second contact. The boost circuit includes two diodes—anodes of the two diodes are mutually coupled to a first contact and cathodes of the two diodes are coupled to a first bridge arm upper contact and a second bridge arm upper contact, two diodes—cathodes of the two diodes are mutually coupled to a second contact and anodes of the two diodes are coupled to a first bridge arm lower contact and a second bridge arm lower contact, the second contact is coupled to the first contact, and at least two capacitors are coupled to the secondary side first contact and the secondary side second contact.
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公开(公告)号：US10734835B2
公开(公告)日：2020-08-04
申请号：US16052914
申请日：2018-08-02
Applicant: DELTA ELECTRONICS, INC.
Inventor： Chao-Li Kao , Hung-Chieh Lin , Chao-Lung Kuo , Yi-Ping Hsieh , Jin-Zhong Huang , Po-Hsin Tseng
Abstract: A power bypass apparatus with a current-sharing function includes at least two bypass switch assemblies and a control unit. Each bypass switch assembly includes a controllable switch, a cooling unit, and a temperature detection unit. Each the temperature detection unit, correspondingly disposed to a heat-dissipating unit, detects a temperature value of the controllable switch to produce a temperature detection signal. The control unit receives the temperature detection signals and outputs at least two switch control signals to control at least one of the controllable switches or outputs at least two cooling unit control signals to control at least one of the cooling units, thus making currents flowing through the controllable switches identical. Accordingly, it is to increase overall efficiency of a power system and implement current-sharing function of the power system providing high power.
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公开(公告)号：US11936238B2
公开(公告)日：2024-03-19
申请号：US17840714
申请日：2022-06-15
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hsin-Chih Chen , Hung-Chieh Lin , Chao-Lung Kuo , Yi-Ping Hsieh , Chien-Shien Lee
IPC: H02J9/06 , H03K17/082
CPC classification number: H02J9/062
Abstract: An uninterruptible power apparatus is coupled between a power grid and a load. The uninterruptible power apparatus includes a bypass path, a power conversion module, and a control module. The bypass path is coupled to the power grid through a grid terminal, and coupled to the load through a load terminal. The control module turns off a first thyristor and a second thyristor by injecting a second voltage into the load terminal during a forced commutation period. The control module calculates a magnetic flux offset amount based on an error amount between the second voltage and a voltage command, and provides a compensation command in response to the magnetic flux offset amount. The control module controls the DC/AC conversion circuit to provide a third voltage to the load terminal based on the compensation command and the voltage command.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11811328B2
公开(公告)日：2023-11-07
申请号：US17570026
申请日：2022-01-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Chih-Hsien Li , Yi-Ping Hsieh , Hung-Chieh Lin , Hung-Yu Huang , Ciao-Yin Pan
CPC classification number: H02M3/33523 , H02M1/0009
Abstract: An isolated conversion apparatus with magnetic bias balance control includes an isolated converter, a controller, and a magnetic bias balance circuit. The isolated converter includes a transformer, and a primary side of the transformer includes a primary-side winding and at least one switch bridge arm. The controller is coupled to the at least one switch bridge arm, and provides a pulse width modulation (PWM) signal group to control the at least one switch bridge arm. The magnetic bias balance circuit is coupled to two ends of the primary-side winding and the controller, and provides a compensation voltage to the controller according to an average voltage of a winding voltage across the two ends of the primary-side winding. The controller adjusts a duty cycle of the PWM signal group according to the compensation voltage to correct the magnetic bias.
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公开(公告)号：US11754638B2
公开(公告)日：2023-09-12
申请号：US17528837
申请日：2021-11-17
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Jen-Chuan Liao , Yi-Ping Hsieh , Hsin-Chih Chen
Abstract: 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.
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公开(公告)号：US11601066B2
公开(公告)日：2023-03-07
申请号：US17395923
申请日：2021-08-06
Applicant: DELTA ELECTRONICS, INC.
Inventor： Hung-Chieh Lin , Yi-Ping Hsieh , Jin-Zhong Huang , Hung-Yu Huang , Chih-Hsien Li
Abstract: A conversion apparatus with a three-level switching circuit includes a DC conversion module, a three-level circuit, and a control unit. The three-level circuit includes a bridge arm assembly and a capacitor assembly. The capacitor assembly includes a first capacitor and a second capacitor connected to the first capacitor in series. The DC conversion module has a positive output end and a negative output end, and the positive output end and the negative output end are coupled to the bridge arm assembly. The control unit controls the switching of a second switch unit and a third switch unit to make the three-level circuit operate in a first state where the positive output end and the negative output end are connected to the first capacitor, and operate in a second state where the positive output end and the negative output end are connected to the second capacitor.
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公开(公告)号：US11349336B2
公开(公告)日：2022-05-31
申请号：US17131789
申请日：2020-12-23
Applicant: DELTA ELECTRONICS, INC.
Inventor： Yuan-Fang Lai , Hung-Chieh Lin , Chao-Li Kao , Chao-Lung Kuo , Hsin-Chih Chen , Yi-Ping Hsieh
Abstract: A method for operating a power factor correction (PFC) circuit of an uninterruptible power supply (UPS) apparatus is provided. The PFC circuit includes two T-type converters, and each of the T-type converters includes four switching tubes. The method includes: converting AC input voltage into a positive bus voltage across a first capacitor and a negative bus voltage across a second capacitor that is connected in series with the first capacitor when the UPS apparatus is operated under a normal supply mode; and controlling conduction states of the switching tubes of the T-type converters to balance the positive bus voltage and the negative bus voltage when the UPS apparatus is operated under a battery supply mode.
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公开(公告)号：US20250007389A1
公开(公告)日：2025-01-02
申请号：US18243626
申请日：2023-09-07
Applicant: Delta Electronics, Inc.
Inventor： Hsin-Chih Chen , Li-Hung Wang , Chao-Li Kao , Yi-Ping Hsieh , Hung-Chieh Lin
IPC: H02M1/32
Abstract: A circulating current suppression method of a power system having a plurality of power modules is provided. Each power module includes a high-voltage bus, a low-voltage bus and a balance circuit having a neutral voltage. The circulating current suppression method includes: in each balance circuit, disposing a first capacitor electrically coupled between the high-voltage bus and the neutral voltage, and disposing a second capacitor electrically coupled between the neutral voltage and the low-voltage bus; acquiring a current effective value of an input of each power module; if detecting that the current effective value of at least one power module doesn't remain at a current reference value, determining that a circulating current occurs in the at least one power module; and operating the balance circuit of the at least one power module to charge the first capacitor or the second capacitor to regulate the neutral voltage for suppressing the circulating current.
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