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公开(公告)号：EP4443724A1
公开(公告)日：2024-10-09
申请号：EP24163704.0
申请日：2024-03-15
发明人： LIU, Hong , ZHANG, Wen , SONG, Baihui
CPC分类号： H02M1/0003 , H02M3/01 , H02M7/4807 , H02M3/33569
摘要： The disclosure discloses a DC bias suppression method (100) and a high-frequency power conversion circuit (10, 20, 30, 40) using the same. The high-frequency power conversion circuit (C2) includes a high-frequency AC port, a switching circuit (S1, S2, S3, S4), a DC port and a power source (Source) connected sequentially, and the DC bias suppression method includes: acquiring voltage information (V1, V2) or current information (I1, I2) of the DC port at N times, where N≥2; obtaining a corresponding first voltage difference (ErrV) or a corresponding first current difference (ErrI) according to the voltage information (V1, V2) or the current information (I1, I2) at the N times; regulating a duty ratio of a driving signal (M) according to the first voltage difference (ErrV) or the first current difference (ErrI); and regulating duty ratios of switching tubes (S1, S2, S3, S4) in the switching circuit according to the driving signal (M).
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公开(公告)号：EP4322382A1
公开(公告)日：2024-02-14
申请号：EP23184995.1
申请日：2023-07-12
发明人： LIU, Hong , SONG, Baihui , OUYANG, Sanyuan , LU, Cheng
摘要： The present disclosure discloses a resonant converter (100), and a controlling method thereof. The resonant converter (100) includes a transformer (10) including a primary winding and a secondary winding, a primary circuit (20) electrically connected to the primary winding and receiving an input voltage ( V in ), and a secondary circuit (30) including a first secondary half-bridge (31) including a first controllable switch (311) and a second secondary half-bridge (32) including a second controllable switch (321). The first and second controllable switches (311, 321) are arranged diagonally. The method includes: controlling a duty ratio of one of the first and second controllable switches (311, 321) in a first switching period ( T 1 ) to form a first short-circuited loop ( L 1 ) during a first interval during; and controlling a duty ratio of the other one in a second switching period ( T 2 ) to form a second short-circuited loop ( L 2 ) during a second interval.
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3.发明公开
公开(公告)号：EP4089899A1
公开(公告)日：2022-11-16
申请号：EP22171119.5
申请日：2022-05-02
发明人： LIU, Hong , KONG, Jie , ZHANG, Wen , SONG, Baihui , LU, Cheng , WU, Hongyang
摘要： A power module (100) includes N inverter units (10) outputting N AC voltages and being coupled to N high-frequency AC terminals (20), wherein the N high-frequency AC terminals (20) are cascaded and connected to a post-stage rectifier circuit (30). A phase-shift control method for the power module includes: setting (S31) at least two phase-shift sequences, wherein phase sequence numbers of the N AC voltages of the N inverter units are different in the at least two phase-shift sequences; in one switching period, controlling (S32) the N AC voltages of the N inverter units to shift a first angle according to a first phase-shift sequence of the at least two phase-shift sequences; and in another switching period, controlling (S33) the N AC voltages of the N inverter units to shift the first angle according to a second phase-shift sequence of the at least two phase-shift sequences.
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4.发明公开
公开(公告)号：EP4228135A1
公开(公告)日：2023-08-16
申请号：EP23155582.2
申请日：2023-02-08
发明人： LIU, Hong , SONG, Baihui , ZHANG, Wen , HU, Wenfei , LU, Cheng
摘要： The disclosure discloses a method for estimating parameters of a resonant converter (100). The resonant converter (100) has a first port (101), a second port (102), and a resonant tank (10) that includes an equivalent resonant capacitor ( C r ) and an equivalent resonant inductor ( L r ), the method including: estimating a second voltage estimation value ( v oEst ) of the second port (102), an equivalent resonant capacitor estimation value, and/or an equivalent resonant inductor estimation value of the resonant converter (100) according to a first voltage ( V in ) of the first port (101), an equivalent resonant capacitor voltage ( v Cr ) and an equivalent resonant inductor current ( i Lr ) of at least three effective points, wherein the points have different coordinates on a state plane of the equivalent resonant capacitor voltage ( v Cr ) and the equivalent resonant inductor current ( i Lr ), and are on a state trajectory formed by the equivalent resonant capacitor voltage ( v Cr ) and the equivalent resonant inductor current ( i Lr ), and the points are not central symmetric about a center of the state trajectory.
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公开(公告)号：EP4195480A1
公开(公告)日：2023-06-14
申请号：EP22211402.7
申请日：2022-12-05
发明人： LIU, Hong , SONG, Baihui , HU, Wenfei , LU, Cheng , WU, Hongyang
摘要： The application discloses a resonant converter and a method for controlling the same. The resonant converter includes: a resonant tank, a first circuit electrically connected to a first end of the resonant tank, and a second circuit electrically connected to a second end of the resonant tank; the first circuit including at least one primary switch, the second circuit including at least one controllable switch, and controlling the at least one controllable switch according to a secondary initial switching frequency, such that the second circuit outputs power, adjusting a secondary switching frequency of the at least one controllable switch according to the secondary initial switching frequency and a signal reflecting the power of the second circuit, such that the secondary switching frequency of the second circuit follows a primary switching frequency of the first circuit.
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公开(公告)号：EP4191851A1
公开(公告)日：2023-06-07
申请号：EP22208789.2
申请日：2022-11-22
发明人： LIU, Hong , ZHANG, Wen , HU, Wenfei , LU, Cheng , WU, Hongyang , SONG, Baihui
摘要： The application provides a cascade system distributed control method and device. The method including: taking an output of a closed-loop control for regulating an AC current of the power module as a reference value of a bridge arm voltage; according to the reference value of the bridge arm voltage to obtain an amplitude of the bridge arm voltage, taking the amplitude of the bridge arm voltage as a feedback signal, and after closed-loop control and regulation together with the AC current of the power module, adjusting the reference value of the bridge arm voltage; and controlling the bridge arm voltage according to the reference value of the bridge arm voltage, wherein in at least one working mode of the cascade system, a change of parameters reflecting an active current has a monotonic relation with a change of the amplitude of the bridge arm voltage.
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