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公开(公告)号：US20190108937A1
公开(公告)日：2019-04-11
申请号：US16093421
申请日：2017-11-04
发明人： Koji NAKAJIMA , Takashi KUMAGAI , Yuji SHIRAKATA , Yujiro KIDO
CPC分类号： H02M3/3353 , H01F27/24 , H01F27/2804 , H01F2027/2809 , H02M3/28 , H02M3/335 , H02M3/33569 , H02M2001/0064
摘要： An insulation type step-up converter includes a core, first and second primary-side coils, a secondary-side coil, and a switching element. The core includes a middle leg, and first and second outer legs. The switching element is configured such that it can be controlled to be on/off so that electric currents flowing simultaneously in the first and second primary-side coils are opposite in direction to each other.
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2.发明授权公开(公告)号：US10079557B2
公开(公告)日：2018-09-18
申请号：US14212082
申请日：2014-03-14
申请人： Enphase Energy, Inc.
CPC分类号： H02M7/4807 , H02M3/3353 , H02M3/33576 , H02M2001/007 , Y02B70/1433
摘要： System and apparatus for power conversion. In one embodiment, the apparatus comprising a DC stage, comprising a resonant circuit, for generating a high-frequency resonant current; and an AC stage for converting a high-frequency current, generated from the high-frequency resonant current, to an AC output current, wherein the AC stage comprises: a pair of serially-connected switches for (i) passing, during a first half of a cycle of an AC line, a positive portion of the high-frequency current, and (ii) passing, during a second half of the cycle of the AC line, a negative portion of the high-frequency current; and an unfurling bridge for unfurling a current waveform, formed from the positive and the negative portions, to generate the AC output current, wherein the unfurling bridge is operated at a frequency on the order of three orders of magnitude lower than an operating frequency of the serially-connected switches.
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公开(公告)号：US20180241318A1
公开(公告)日：2018-08-23
申请号：US15962102
申请日：2018-04-25
申请人： Yang Chen , Hongliang Wang , Yan-Fei Liu , Zhanming Li , Yue Fu
发明人： Yang Chen , Hongliang Wang , Yan-Fei Liu , Zhanming Li , Yue Fu
CPC分类号： H02M7/219 , H02M1/10 , H02M1/4208 , H02M1/4233 , H02M1/4241 , H02M3/3353 , H02M3/33592 , H02M3/337 , H02M7/217 , H02M2001/0058 , H02M2001/007
摘要： A hybrid rectifier that works as either a hybrid full bridge or a voltage doubler. Under 220 V AC input condition, the hybrid rectifier operates in full bridge mode, while at 110 V AC input, it operates as voltage doubler rectifier. The hybrid rectifier may be used with a DC-DC converter, such as an LLC resonant converter, in a power supply. With this mode switching, the LLC converter resonant tank design only takes consideration of 220 V AC input case, such that the required operational input voltage range is reduced, and the efficiency of the LLC converter is optimized. Both the size and power loss are reduced by using a single stage structure instead of the conventional two-stage configuration.
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公开(公告)号：US09906161B1
公开(公告)日：2018-02-27
申请号：US15636652
申请日：2017-06-29
发明人： Chi-Lin Chen
IPC分类号： H02M7/217 , H02M3/335 , H01L29/772 , H02M1/16
CPC分类号： H02M7/217 , H01L29/7722 , H02M1/16 , H02M3/3353 , H02M3/33553 , H02M3/33576 , H02M3/33592
摘要： A power conversion apparatus including a transformer, a synchronous rectification (SR) transistor and a SR controller is provided. The SR transistor is coupled between a secondary side of the transformer and an output terminal. The SR controller receives a cross voltage between a drain terminal and a source terminal of the SR transistor as a first detection signal. The SR controller obtains a first time length according to a voltage value of the first detection signal, a voltage value of a first trigger signal and a voltage value of a second trigger signal. The SR controller determines a time point to turn off the SR transistor according to the first time length.
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公开(公告)号：US09882497B2
公开(公告)日：2018-01-30
申请号：US14038199
申请日：2013-09-26
CPC分类号： H02M3/3353 , H02M3/33592 , H02M2001/0058 , H05B33/0815 , Y02B20/346 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
摘要： A switching circuit including a transformer having a primary and a secondary side; a first MOSFET switch coupled with the primary side; a primary current sensing device; a second MOSFET switch coupled with the secondary side; a secondary current sensing device; and a control circuit for driving the first and second MOSFET switches, wherein first and second switch are complementarily driven and wherein switching of the first and second MOSFET switches is controlled by the primary and secondary current sensing devices.
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公开(公告)号：US20170346410A1
公开(公告)日：2017-11-30
申请号：US15167364
申请日：2016-05-27
申请人： NXP B.V.
CPC分类号： H02M3/33569 , H02M3/3353 , H02M3/33546 , H02M2007/4811 , H02M2007/4815 , H02M2007/4818 , Y02B70/1433
摘要： Disclosed is a power converter including a generator configured to generate a sequence of output voltage waveforms, a resonant tank connected to the generator comprising at least one capacitor and at least one inductor, a transformer including a primary side connected in series with said series inductor and, the primary side being configurable to use at least one primary winding tap and a secondary side for connecting to a rectifying circuit for providing a rectified DC voltage to an output load circuit, a first switch and a second switch on the primary side connected to the primary winding, wherein the at least one primary winding is selected by the first switch or the second switch to select a different reflected output voltage by closing the first switch or the second switch.
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公开(公告)号：US09812895B2
公开(公告)日：2017-11-07
申请号：US14911054
申请日：2014-03-14
发明人： Mao Kawamura , Masayuki Kato , Mamoru Takikita
CPC分类号： H02J7/14 , B60L11/1805 , B60L11/1812 , B60L11/1816 , B60L2210/10 , B60L2210/30 , H02J7/0077 , H02J7/022 , H02M3/3353 , H02M3/33553 , H02M7/066 , H02M2001/0051 , Y02T10/7005 , Y02T10/7072 , Y02T10/7216 , Y02T10/7241 , Y02T10/92 , Y02T90/127 , Y02T90/14
摘要： A Si diode is used as a rectifying diode on a transformer secondary side of an isolated DC/DC converter, and a high-voltage Schottky barrier diode made of a wide bandgap semiconductor is used as a free-wheeling diode arranged between a rectifier circuit and a smoothing reactor. Thus, there may be provided an in-vehicle charger capable of suppressing a diode recovery surge voltage with a circuit configuration that is simpler and suppressed in cost increase as compared to a case where a related-art synchronous rectifier circuit system is employed.
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公开(公告)号：US09793817B2
公开(公告)日：2017-10-17
申请号：US14767567
申请日：2014-06-26
发明人： Woojin Choi , Long Tran Van
CPC分类号： H02M3/33561 , H02M3/3353 , H02M2001/009
摘要： A multiple output converter is provided. The multiple output converter includes a power conversion circuit and a switching control unit. The power conversion circuit includes an input unit having at least one first switch, a transformer unit configured to convert a magnitude of power from the input unit, an output unit having a plurality of output terminals, which are configured to receive the power from the transformer unit, and a second switch unit having a plurality of second switches, wherein each of the plurality of second switches is installed in each of the plurality of output terminals, respectively, and is controlled in a time division multiple control manner. The switching control is configured to transmit a pulse width modulation signal to the at least one first switch and the plurality of second switches for controlling the at least one first switch and the plurality of second switches in the time division multiple control manner.
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9.发明申请公开(公告)号：US20170288528A1
公开(公告)日：2017-10-05
申请号：US15266005
申请日：2016-09-15
CPC分类号： H02M1/36 , H02M1/08 , H02M1/38 , H02M3/33507 , H02M3/3353 , H02M3/33569
摘要： An ACF power converter uses a soft start operation to reduce overheating and stress on components. The power converter includes a first transistor and second transistor. A high side driver controls the first transistor, and low side driver controls the second transistor. A first operating potential is provided to the low side driver during a first period of time. The second transistor switches based on an oscillator signal having a first rate of frequency change to generate a second operating potential for the high side driver, while attempting to hold the first transistor in the non-conductive state during a second time period. The first and second transistors switch based on the oscillator signal having a second rate of frequency change during a third time period. The power converter is held in ACF mode and inhibited from changing state for a period of time post soft start.
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公开(公告)号：US20170222566A1
公开(公告)日：2017-08-03
申请号：US15415360
申请日：2017-01-25
发明人： Chang-Yu WU , Tzu-Chen LIN
IPC分类号： H02M3/335
CPC分类号： H02M3/33569 , H02M1/15 , H02M3/005 , H02M3/1582 , H02M3/3353 , H02M7/04 , H02M2001/007
摘要： An AC-to-DC power converter includes a rectifier for generating a rectified voltage based on an AC voltage; an input capacitor coupled between the rectifier and a fixed-voltage terminal; a first inductive element; a first auxiliary capacitor; a first switch coupled between the input capacitor and the first inductive element; a second switch coupled between the first inductive element and the fixed-voltage terminal; a circuitry node; an auxiliary switch for coupling between the circuitry node and the first auxiliary capacitor or between the first auxiliary capacitor and the fixed-voltage terminal; a first diode; a second diode; a control signal generating circuit for controlling the first switch and the second switch; and an auxiliary switch control circuit for controlling the auxiliary switch.
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