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公开(公告)号：US20190097526A1
公开(公告)日：2019-03-28
申请号：US16134312
申请日：2018-09-18
申请人： TDK CORPORATION
发明人： Tomokazu IKARASHI
CPC分类号： H02M1/4208 , H02M1/34 , H02M1/42 , H02M1/4233 , H02M7/217 , H02M2001/346 , H02M2001/348
摘要： A bridgeless power factor correction circuit includes: a first leg composed of a series circuit with a first rectifier and a first switch; a second leg that is composed of a series circuit with a second rectifier and a second switch and is connected in parallel to the first leg; a smoothing capacitor connected in parallel to the first leg; a snubber circuit that is connected between a first connection point, which is located between the first rectifier and the first switch and is connected via a first inductor to one end of an AC power supply, and a second connection point, which is located between the second rectifier and the second switch and is connected via a second inductor to another end of the AC power supply; and a control circuit that executes on/off control of the first switch and the second switch.
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公开(公告)号：US20180323721A1
公开(公告)日：2018-11-08
申请号：US15746406
申请日：2016-06-30
发明人： Stephen GREETHAM
CPC分类号： H02M3/33592 , A47L9/2878 , H01M10/44 , H01M10/443 , H02J7/0065 , H02J7/0068 , H02J7/022 , H02J7/34 , H02J9/062 , H02M1/4208 , H02M1/4225 , H02M1/44 , H02M2001/0048 , H02M2001/0058 , Y02B70/126 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
摘要： A power supply that operates in two modes comprising input terminals for connection to an AC source, output terminals for connection to a load, an AC-to-DC stage, and a battery. When operating in the first mode, the load draws current from the battery only. When operating in the second mode, the load draws current from both the battery and the AC-to-DC stage. The current drawn by the load is then greater than the current output by the AC-to-DC stage during first periods, and is less than the current output by the AC-to-DC stage during second periods. The load draws current from the battery and the AC-to-DC stage during the first periods such that the battery discharges, and the load and the battery each draw current from the AC-to-DC stage during the second periods such that the battery charges.
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33.发明申请公开(公告)号：US20180309293A1
公开(公告)日：2018-10-25
申请号：US15768568
申请日：2016-09-19
IPC分类号： H02J3/18 , H02M1/42 , H02M7/5387
CPC分类号： H02J3/1842 , H02M1/4208 , H02M7/5387 , H02M2001/007 , H02M2003/1552 , Y02E40/22
摘要： A power factor correction device for an AC voltage supply system includes a transformer which is interconnected, on the secondary side, to form a star point circuit and which has a secondary-side connection for each phase. A module series circuit with at least two switching modules, which are connected in series and each of which has at least four switches and a capacitor, is respectively connected between each of the secondary-side connections of the transformer and the star point of the star circuit. There is provided a transformer which is a high-leakage-reactance transformer.
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公开(公告)号：US20180287488A1
公开(公告)日：2018-10-04
申请号：US15921702
申请日：2018-03-15
发明人： Chuk Hung CHAN
CPC分类号： H02M1/4208 , G01R19/10 , H02M1/4225 , H02M2001/0009 , H02M2001/0012 , Y02B70/126 , Y02P80/112
摘要： A PFC device includes at least one main switch, a converter that converts a current to be sensed in the PFC device into a voltage to be sensed, the PFC device generating a switch control signal to control the at least one main switch based on the current to be sensed, and a voltage sensor that receives the voltage to be sensed and an offset voltage, and senses the voltage to be sensed using the offset voltage to output a sense voltage. A method includes sampling the sense voltage, determining a sense value of the offset voltage based on a sampling result, and calculating the current to be sensed based on a difference between the sense voltage and the sense value.
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35.发明申请公开(公告)号：US20180287466A1
公开(公告)日：2018-10-04
申请号：US15763659
申请日：2016-08-23
发明人： Sun Jin KIM , Hyun Soo PARK , Sang Cheol MOON
CPC分类号： H02K11/33 , H02H7/08 , H02H7/0844 , H02K11/26 , H02K11/35 , H02M1/4208 , H02M1/44 , H02M3/33507 , H02M7/003 , H02M7/06 , H02M7/53871 , H02M2001/007 , H02P23/00 , H02P27/06 , H02P27/08
摘要： A motor driving apparatus includes a first module on which an inverter circuit configured to supply a driving current to a motor is mounted, a second module on which a control circuit configured to control the inverter circuit is mounted, and a third module on which a power circuit configured to supply direct-current (DC) power to at least one of the inverter circuit and the control circuit. The first module and the second module are attachable to and detachable from the third module.
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公开(公告)号：US20180269773A1
公开(公告)日：2018-09-20
申请号：US15856692
申请日：2017-12-28
发明人： Shunichi KAERIYAMA
IPC分类号： H02M1/08 , H02M5/458 , H02M1/42 , H02M7/5395
CPC分类号： H02M1/08 , H02M1/4208 , H02M5/458 , H02M7/53873 , H02M7/5395 , H02M2001/0009 , H02M2001/008 , H02P27/08
摘要： An object of the invention is to improve precision of current detection in a switching system having plural switching circuits. A first PWM timing generation circuit generates an edge timing of a PWM signal by using a comparison value and a count value and drives a first switching circuit. A second PWM timing generation circuit generates an edge timing of a PWM signal of plural phases by using a comparison value and a count value and drives a second switching circuit. One of the switching circuits is an inverter circuit of a common shunt type in which a shunt resistor is provided commonly for plural phases. One of the PWM timing generation circuits shifts the generated edge timing so that an interval between an edge timing of one of the circuits and an AD conversion timing of the other becomes equal to or larger than a predetermined reference value.
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公开(公告)号：US10038366B2
公开(公告)日：2018-07-31
申请号：US15647615
申请日：2017-07-12
发明人： Hiromitsu Terui
CPC分类号： H02M1/4208 , H02M1/32 , H02M1/4225 , H02M3/00 , H02M7/219 , H02M7/23 , H02M2001/0009 , H02M2003/1586 , Y02B70/126 , Y02P80/112
摘要： A rectification circuit rectifies an alternating current voltage of an alternating current power supply. A parallel converter comprises converters that correspond to phases and that are connected in parallel to an output terminal of the rectification circuit. Each converter comprising a reactor, a switching circuit that is connected in series to the reactor and a diode that is connected in series to the reactor. A smoothing capacitor is connected to an output terminal of the parallel converter. A control circuit generates pulse signals corresponding to phases based on an error voltage between an output voltage of the smoothing capacitor and a reference voltage and on an output voltage of the rectification circuit, and switches the switching circuits in the converters using the pulse signals. Current detection circuits are provided corresponding to the converters and that detect currents flowing through the switching circuits.
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公开(公告)号：US20180198366A1
公开(公告)日：2018-07-12
申请号：US15746401
申请日：2016-06-30
CPC分类号： H02M1/4225 , H02J7/022 , H02J7/06 , H02J2007/0059 , H02M1/4208 , H02M1/4241 , H02M1/4258 , H02M1/44 , H02M3/33576 , H02M3/33592 , H02M2001/007 , Y02B40/90 , Y02B70/126 , Y02P80/112
摘要： A battery charger comprising input terminals for connection to an AC source supplying an alternating input voltage, output terminals for connection to a battery to be charged, and a PFC circuit connected between the input terminals and the output terminals. The power factor correction (PFC) circuit regulates an input current drawn from the AC source such that the input current has a waveform selected from a sine wave with third harmonic injection, a clipped sine wave and a trapezoidal wave. The battery charger then generates an output current at the output terminals, the output current having a waveform defined by the multiplication of the input current and the input voltage.
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公开(公告)号：US20180191168A1
公开(公告)日：2018-07-05
申请号：US15861898
申请日：2018-01-04
发明人： John G. Banaska , Chin-Hong Cheah
CPC分类号： H02J3/46 , G05F1/12 , H02M1/4208 , H02M3/33569 , H02M2001/0058
摘要： A multiphase power converter may include a number of LLC converter stages coupled in a parallel interleaved current sharing configuration. The total current provided by the multiphase power converter may be balanced between the different LLC converter stages by sensing a respective output current in each LLC converter stage, with the sensed output current of one of the LLC converter stages used as a reference current, and performing one or more adjustments for each LLC converter stage (other than the reference LLC converter stage), based on the sensed output currents. The adjustments may include adjusting the input voltage provided to the LLC converter stage, the resonant frequency of the LLC converter stage, and/or the effective resonance impedance of the LLC converter stage. The ability to sense the phase current or power makes it possible to achieve balance between different LLC converter stages in a multiphase LLC-stage current sharing configuration.
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公开(公告)号：US09968008B2
公开(公告)日：2018-05-08
申请号：US15162519
申请日：2016-05-23
申请人： Baidu USA LLC
发明人： Charles Ingalz
CPC分类号： H05K7/20736 , H02M1/4208 , H02P7/06 , H05K7/20836
摘要： An electronic rack includes a plurality of information technology (IT) components arranged in a stack, and a rack power supply having a voltage converter and a voltage regulator. The rack power supply to receive an input voltage from a power source, where the voltage converter is to convert the input voltage into an intermediate voltage, where the voltage regulator is to regulate the intermediate voltage to generate a regulated voltage to be supplied to the plurality of the IT components. Each electronic rack includes a fan system having one or more fan units coupled to the rack power supply to provide cooling air to reduce an operating temperature of the IT components, where each of the fan units is to receive the intermediate voltage without going through the voltage regulator and to provide power to a fan of the fan unit.
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