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公开(公告)号：US20210359594A1
公开(公告)日：2021-11-18
申请号：US17209073
申请日：2021-03-22
Applicant: Delta Electronics, Inc.
Inventor： Chi ZHANG , Zhiyu SHEN , Yungtaek JANG , Sheng-Hua LI , Ruxi WANG , Peter Mantovanelli BARBOSA
Abstract: The present disclosure provides a three-phase AC/DC converter aiming for low input current harmonic. The converter includes an input stage for receiving a three-phase AC input voltage, an output stage for at least one load, and one or more switching conversion stages, each stage including a plurality of half bridge modules. The switches in each module operate with a substantially fixed 50% duty cycle and are connected in a specific pattern to couple a DC-link and a neutral node of the input voltage. The AC/DC converter further includes one or more controllers adapted to vary the switching frequency of the switches in the switching conversion stages based on at least one of load voltage, load current, input voltage, and DC-link voltage. The converter can also include one or more decoupling stages, such as, inductive components adapted to decouple the output stage from the switching conversion stages.
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公开(公告)号：US20220344092A1
公开(公告)日：2022-10-27
申请号：US17471142
申请日：2021-09-09
Applicant: Delta Electronics, Inc.
Inventor： Ruxi WANG , Zhiyu SHEN , Chi ZHANG , Peter Mantovanelli BARBOSA
Abstract: The present disclosure provides a printed circuit board (PCB) based planar winding structure for a main power transformer and/or an auxiliary power need. The PCB-based planar winding structure can confine electric field through magnetic core potential control and thus create partial discharge (PD) free design for medium voltage (MV) applications. Meanwhile, the winding structure can be formed in the PCB manufacturing process to create a more modular and reliable structure, thereby enhancing manufacturability. Techniques, such as termination treatment, primary and secondary winding arrangements, etc., can be used to control the electrical stress in the medium voltage applications.
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公开(公告)号：US20240186054A1
公开(公告)日：2024-06-06
申请号：US18049491
申请日：2022-10-25
Applicant: Delta Electronics, Inc.
Inventor： Anup ANURAG , Chi ZHANG , Rudy WANG , Zhiyu SHEN , Peter BARBOSA
CPC classification number: H01F27/2804 , H01F27/26 , H05K1/165 , H01F2027/2809 , H02M3/335
Abstract: The present disclosure provides a power transformer for medium voltage semiconductor devices. In one aspect, the power transformer includes a primary winding and a secondary winding, a primary magnetic core wound by the primary winding, a secondary magnetic core wound by the secondary winding, and a coupling coil wound about the primary and secondary magnetic cores.
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Patent Agency Ranking
公开(公告)号：US20220344946A1
公开(公告)日：2022-10-27
申请号：US17483518
申请日：2021-09-23
Applicant: Delta Electronics, Inc.
Inventor： Ruxi WANG , Zhiyu SHEN , Chi ZHANG , Tomas SADILEK , Peter Mantovanelli BARBOSA
IPC: H02J7/00 , H03K17/687
Abstract: The present disclosure provides a high voltage device built from modular low voltage cells. Each low voltage cell includes a plurality of low voltage semiconductor devices and one or more low voltage passive components. Each cell can be a current-bidirectional two-quadrant switch or a four-quadrant switch. All the cells may be identical and controlled with a delay time in between. Therefore, the total on and off time of the high voltage device can be controlled to reduce the output equivalent dv/dt. The cell's voltage balancing can be achieved through a control algorithm disclosed herein.
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公开(公告)号：US20240266968A1
公开(公告)日：2024-08-08
申请号：US18163393
申请日：2023-02-02
Applicant: Delta Electronics, Inc.
Inventor： Chi ZHANG , Rudy WANG , Zhiyu SHEN , Peter BARBOSA , Sheng-Hua LI
Abstract: A three-phase AC-DC converter is provided that can offer a low total harmonic distortion (THD) of input current and good power factor with the capability of soft-switching of the active switches. In one aspect, a phase shift is introduced to the gate signal of one of the primary side active switches of the three-phase AC-DC converter and the gate signal of a corresponding one of the secondary side active switches of the three-phase AC-DC converter.
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公开(公告)号：US20240014743A1
公开(公告)日：2024-01-11
申请号：US17861157
申请日：2022-07-08
Applicant: Delta Electronics, Inc.
Inventor： Satyaki MUKHERJEE , Chi ZHANG , Tomas SADILEK , Misha KUMAR , Boyi ZHANG , Peter Mantovanelli BARBOSA
CPC classification number: H02M3/33592 , H02M3/01 , H02M1/0058 , H02M1/0009 , H02M3/33573
Abstract: A novel phase-shift based modulation strategy is disclosed that enables a DC-DC converter to operate with zero voltage-switching (ZVS) across wide voltage and power range. The converter operates at a fixed fundamental frequency, with the output current controlled based on an amount of phase shift of the fundamental component at the output of an inverter portion of the converter. To achieve soft switching a rectifier portion of the converter is controlled to phase shift the fundamental component of the rectifier voltage observed at a rectifier reference terminal. More specifically, by requiring a phase shift of the voltage at the rectifier terminal relative to the output voltage of the inverter, the inverter current is such that ZVS is achieved. A converter and method are provided to implement DC-DC conversion with soft switching.
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公开(公告)号：US20230188032A1
公开(公告)日：2023-06-15
申请号：US18163960
申请日：2023-02-03
Applicant: Delta Electronics, Inc.
Inventor： Chi ZHANG , Zhiyu SHEN , Yungtaek JANG , Sheng-Hua LI , Ruxi WANG , Peter Mantovanelli BARBOSA
CPC classification number: H02M1/4216 , H02M1/12 , H02M7/2173 , H02M7/219 , H02M7/2195 , H02M7/23
Abstract: The present disclosure provides a three-phase AC/DC converter aiming for low input current harmonic. The converter includes an input stage for receiving a three-phase AC input voltage, an output stage for at least one load, and one or more switching conversion stages, each stage including a plurality of half bridge modules. The switches in each module operate with a substantially fixed 50% duty cycle and are connected in a specific pattern to couple a DC-link and a neutral node of the input voltage. The AC/DC converter further includes one or more controllers adapted to vary the switching frequency of the switches in the switching conversion stages based on at least one of load voltage, load current, input voltage, and DC-link voltage. The converter can also include one or more decoupling stages, such as, inductive components adapted to decouple the output stage from the switching conversion stages.
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公开(公告)号：US20210408922A1
公开(公告)日：2021-12-30
申请号：US17363119
申请日：2021-06-30
Applicant: Delta Electronics, Inc.
Inventor： Chi ZHANG , Zhiyu SHEN , Ruxi WANG , Peter Mantovanelli BARBOSA
Abstract: The present disclosure provides a series resonant converter and its corresponding control method. In one aspect, the series resonant converter includes m (m=1, 2, 3, . . . ) sets of primary side stages in parallel, wherein each primary side stage is identical and includes n (n=2, 3, . . . ) stacked element circuits, where the primary side stages receive an input voltage; nxm resonant networks coupled to the primary side stages; nxm transformers having nxm primary side windings and nxm secondary side windings, where the primary side windings are coupled to the nxm resonant networks; p (p=1, 2, 3, . . . ) sets of secondary side stages in parallel, wherein each secondary side stage is identical and includes q (q=n×m/p) stacked element circuits, where the secondary side stages are coupled to n×m secondary side windings; and a control block controlling the primary side switches according to the output voltage, input voltage and input capacitor voltages.
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