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公开(公告)号：EP3910770A1
公开(公告)日：2021-11-17
申请号：EP21169856.8
申请日：2021-04-22
发明人： Zhang, Chi , Shen, Zhiyu , Jang, Yungtaek , Li, Sheng-Hua , Wang, Ruxi , Barbosa, Peter Mantovanelli
摘要： The present disclosure provides a three-phase AC/DC converter (600) aiming for low input current harmonic. The converter (600) includes an input stage for receiving a three-phase AC input voltage, an output stage for at least one load (R), and one or more switching conversion stages (630), each stage (630) including a plurality of half bridge modules (632, 634). The switches (S 1 , S 2 ) in each module (632) operate with a substantially fixed 50% duty cycle and are connected in a specific pattern to couple a DC-link and a neutral node (N) of the input voltage. The AC/DC converter (600) further includes one or more controllers (640) adapted to vary the switching frequency of the switches (S 1 , S 2 , S 3 , S 4 ) in the switching conversion stages (630) based on at least one of load voltage, load current, input voltage, and DC-link voltage. The converter (600) can also include one or more decoupling stages, such as, inductive components adapted to decouple the output stage (650) from the switching conversion stages (630).
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公开(公告)号：EP4369580A1
公开(公告)日：2024-05-15
申请号：EP23206410.5
申请日：2023-10-27
CPC分类号： H02M1/0095 , H02M1/0058 , H02M1/4216 , H02M1/4233 , H02M7/4837 , H02M7/4833 , H02M7/5388
摘要： FCML rectifiers and control methods thereof are provided. The FCML rectifier operates with an input voltage (vin) and includes an inductor (L), a plurality of upper switches (S1, S2, S3 ..., SN), and a plurality of lower switches (S1, S2, S3..., SN). The upper and lower switches are electrically connected in series. The inductor (L) is coupled between the input voltage (vin) and a midpoint between the upper switches (S1, S2, S3 ..., SN) and the lower switches (S1, S2, S3..., SN). During critical transition points, at least one of first and second modulation schemes is performed. In the first modulation scheme, any rising edge of the control signal of any one lower switch (S1, S2, S3..., SN) is controlled to be synchronous with a rising edge of the control signal of at least one another lower switch (S1, S2, S3..., SN) for achieving ZVS. In the second modulation scheme, a phase-shift (Ø) of the control signals and a switching frequency (fs) are controlled to achieve ZVS with minimum conduction loss.
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公开(公告)号：EP4304069A1
公开(公告)日：2024-01-10
申请号：EP22193222.1
申请日：2022-08-31
发明人： Mukherjee, Satyaki , Zhang, Chi , Sadilek, Tomas , Kumar, Misha , Zhang, Boyi , Barbosa, Peter Mantovanelli
摘要： A novel phase-shift based modulation strategy is disclosed that enables a DC-DC converter (100) to operate with zero-voltage-switching (ZVS) across wide voltage and power range. The converter (100) 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 (110) of the converter (100). To achieve soft switching, a rectifier portion (130) of the converter (100) is controlled to phase shift the fundamental component of the rectifier voltage observed at a rectifier reference terminal (131). More specifically, by requiring a phase shift of the voltage at the rectifier reference terminal (131) relative to the output voltage of the inverter (110), the inverter current is such that ZVS is achieved. A converter (100) and method are provided to implement DC-DC conversion with soft switching.
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公开(公告)号：EP4160631A1
公开(公告)日：2023-04-05
申请号：EP22169666.9
申请日：2022-04-25
摘要： The present disclosure provides a printed circuit board (PCB) based planar winding structure (500) for a main power transformer and/or an auxiliary power need. The PCB-based planar winding structure (500) 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：EP3916984A1
公开(公告)日：2021-12-01
申请号：EP21175389.2
申请日：2021-05-21
发明人： Zhang, Chi , Barbosa, Peter
摘要： An efficient control method for an isolated multilevel DC/DC resonant converter (700, 800, 1000, 1400, 1600, 1650, 1700, 1750, 1800, 2100) achieves a wide output voltage range with a narrow device switching frequency range, relative to the output voltage range and the device switching frequency range of the prior art. At any given time, a control circuit (801, 1401, 1601, 1651, 1701, 1751, 1801, 2101) selects one of three different modulation schemes to operate the primary-side switching devices of the resonant converter (700, 800, 1000, 1400, 1600. 1650, 1700, 1750, 1800, 2100) based on at least one of output voltage (V o ), output current (I ο ), input signal, and one or more external control signals. Together with a selected device switching frequency, the three modulation schemes generate different voltage waveforms to a primary-side transformer, which are coupled to the secondary-side to provide different output voltages (V o ).
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公开(公告)号：EP3787171A1
公开(公告)日：2021-03-03
申请号：EP20192603.7
申请日：2020-08-25
发明人： Zhang, Chi , Barbosa, Peter , Jiao, Yang
摘要： An efficient control method for an isolated multilevel DC/DC resonant converter (700, 800, 1000, 1400, 1600. 1650, 1700, 1750) achieves a wide output voltage range with a narrow device switching frequency range, relative to the output voltage range and the device switching frequency range of the prior art. At any given time, a control circuit (801, 1401, 1601, 1651, 1701, 1751) selects one of two different modulation schemes to operate the primary-side switching devices of the resonant converter (700, 800, 1000, 1400, 1600. 1650, 1700, 1750) based on at least one of output voltage ( V o ), output current, input signal, and one or more external control signals. Together with a selected device switching frequency, the two modulation schemes generate different voltage waveforms to a primary-side transformer, which are coupled to the secondary-side to provide different output voltages ( V o ).
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公开(公告)号：EP4412066A1
公开(公告)日：2024-08-07
申请号：EP24152938.7
申请日：2024-01-19
CPC分类号： H02M7/4837 , H02M1/0095 , H02M1/4216 , H02M3/33571 , H02M3/33569 , H02M3/33576 , H02M3/33573 , H02M3/01 , H02M1/007 , H02M1/4241 , H02M1/008 , H02M3/285 , H02M3/33561 , H02M7/4835
摘要： A three-phase AC-DC converter (800) 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 (S1, S2). In one aspect, a phase shift (PS) is introduced to the gate signal of one of the primary side active switches (S2) of the three-phase AC-DC converter (800) and the gate signal of a corresponding one of the secondary side active switches (SO1) of the three-phase AC-DC converter (800).
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8.发明公开
公开(公告)号：EP4084317A1
公开(公告)日：2022-11-02
申请号：EP22164025.3
申请日：2022-03-24
IPC分类号： H02M7/483
摘要： The present disclosure provides a high voltage device (800) built from modular low voltage cells (810_1, 810_2, 810_N). Each low voltage cell (810_1, 810_2, 810_N) 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 (910, 1010) or a four-quadrant switch (1110, 1210). 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：EP3934084A1
公开(公告)日：2022-01-05
申请号：EP21182381.0
申请日：2021-06-29
摘要： The present disclosure provides a DC-DC resonant converter and its corresponding control method. In one aspect, the DC-DC 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 (V in ); n*m resonant networks coupled to the primary side stages; n*m transformers having n*m primary side windings and n*m secondary side windings, where the primary side windings are coupled to the n*m 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 (V o ), input voltage (V in ) and input capacitor voltages.
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