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公开(公告)号：US20200044439A1
公开(公告)日：2020-02-06
申请号：US16305292
申请日：2017-12-26
发明人： Weiping LI , Weijia YAN , Wenjian LIAO , Xin ZHANG
摘要： A current limiting circuit for controlling current from a power supply to a load having a capacitance includes an inductor, a transistor coupled in a current path with the inductor, and a control circuit. The transistor includes a control terminal. The control circuit is coupled to sense a voltage across the inductor and coupled to the control terminal of the transistor. The control circuit is configured to turn off the transistor when the voltage across the inductor is greater than a threshold to restrict current from a power supply, and turn on the transistor when a defined parameter is met to allow current from the power supply to charge the load capacitance. Other example current limiting circuits are also disclosed.
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公开(公告)号：US20180367056A1
公开(公告)日：2018-12-20
申请号：US15753598
申请日：2016-08-31
发明人： Qing Feng LIU , Shijie DENG , Guang LI , Zhao ZHOU
CPC分类号： H02M7/12 , H02M1/14 , H02M3/156 , H02M2001/007 , Y02P80/112
摘要： Example isolated AC-DC power supplies include a PFC converter coupled to an AC input, a DC-DC converter coupled between the PFC converter and a DC output, and a controller configured to control switching operation of the DC-DC converter. A pulse modulator is coupled to an output of the PFC converter to receive a signal representative of voltage ripple at the output of the PFC converter, and is configured to modulate a pulse signal based on an amplitude of the voltage ripple. A pulse demodulator is coupled to the pulse modulator to receive the modulated pulse signal, and is configured to demodulate the modulated pulse signal and provide a demodulated signal to adjust switching operation of the DC-DC converter. Also disclosed are methods for controlling isolated AC-DC power supplies.
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公开(公告)号：USD1034483S1
公开(公告)日：2024-07-09
申请号：US29864398
申请日：2022-05-25
设计人： Austin M. Noble , Robert H. Kippley
摘要： FIG. 1 is a front top perspective view of a fuse holder showing our new design.
FIG. 2 is a front view thereof.
FIG. 3 is a back view thereof.
FIG. 4 is a left side view thereof.
FIG. 5 is a right side view thereof.
FIG. 6 is a top view thereof.
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a back top perspective view thereof.
The broken lines illustrated in the drawings depict portions of the fuse holder that form no part of the claimed design.-
公开(公告)号：US20240072673A1
公开(公告)日：2024-02-29
申请号：US17823849
申请日：2022-08-31
发明人： James Sigamani
CPC分类号： H02M3/33571 , H02M3/01
摘要： A three-phase power supply circuit comprises three LLC resonant voltage converters and a transformer assembly comprising three primary coil assemblies and three secondary coil assemblies. Each primary coil assembly comprises a first primary winding having a first node electrically coupled with a respective first voltage output of the pair of voltage inputs of a respective LLC resonant voltage converter of the three LLC resonant voltage converters and a second node. Each primary coil assembly also comprises a second primary winding comprising a first node and a second node electrically coupled with a respective second voltage output of the pair of voltage inputs of the respective LLC resonant voltage converter. The second nodes of the first primary windings are electrically coupled together, and the first nodes of the second primary windings are electrically coupled together.
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公开(公告)号：US11784556B2
公开(公告)日：2023-10-10
申请号：US18051208
申请日：2022-10-31
发明人： Yongtao Xie , Pengfei Cai , Wenchao Que
CPC分类号： H02M1/32 , H02M1/0009 , H02M1/0038
摘要： A power device is provided. The power device includes a current limiting resistor in series with a load, the current limiting resistor configured to provide a first current path to the load. The power device also includes an inrush current control device configured to provide a second current path to the load, the second current path configured to bypass the first current path in response to the inrush current control device being activated. The power device also includes a bypass device configured to provide a third current path to the load, the third current path configured to provide a low-resistance current path to the load during a power surge.
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公开(公告)号：US11728728B2
公开(公告)日：2023-08-15
申请号：US17453548
申请日：2021-11-04
发明人： Weng Fai Ng
摘要： power supply module comprises a voltage converter coupled to first and second inputs. The voltage converter comprises a boosting circuit configured to boost an input voltage and comprises an input voltage selector (IVS) selectively connect and disconnect the first and second inputs to the boosting circuit. A first sensing circuit is coupled to the first input and comprises a pair of inputs coupled to the first input, a rectifier assembly, a resistor bank coupled between the pair of inputs and the rectifier assembly, a sense resistor coupled to the rectifier assembly, and a voltage sensor coupled to the sense resistor. A DC converter is configured to generate and supply an auxiliary voltage to the first sensing circuit. The resistor bank filters an electromagnetic interference (EMI) signal transmitted from the DC converter to a value below a threshold value.
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公开(公告)号：US11711020B2
公开(公告)日：2023-07-25
申请号：US16840994
申请日：2020-04-06
发明人： Todd Martin Schaible
CPC分类号： H02M3/33569 , H01F27/24 , H01F27/28 , H01F27/306
摘要： A transformer for a multiphase power converter includes a magnetic structure, a first coil configured to electrically couple to an input circuit or an output circuit of a subconverter of the multiphase power converter, and a second coil configured to electrically couple to an input circuit or an output circuit of another subconverter of the multiphase power converter. The magnetic structure includes a top member, a bottom member, and legs extending between the top member and the bottom member in substantially the same direction. The legs include two outer members and two inner members. The first coil is wound about one of the two inner members of the magnetic structure, and the second coil is wound about the other one of the two inner members of the magnetic structure. Other example transformers, and multiphase power converters including transformers are also disclosed.
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公开(公告)号：US11664721B2
公开(公告)日：2023-05-30
申请号：US17657653
申请日：2022-04-01
CPC分类号： H02M1/4208 , H02M1/42 , H02M1/4258 , H02M3/335
摘要： A multiphase interleaved forward power converter includes an inductor and first and second subconverter comprising respective transformers. The converter also includes first and second drives configured to respectively operate the first and second subconverters with cycling periods comprising a conduction period, a reset period, and an idle period. The first and second drives are also configured to phase shift the cycling periods in each subconverter such that the conduction period of the subconverter is at least partially complementary to the idle period of the other subconverter. The second drive also clamps a voltage across a winding of the transformer of the first subconverter to substantially prevent a first resonance voltage from propagating in the first subconverter during the idle period of the first subconverter.
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公开(公告)号：US11557426B2
公开(公告)日：2023-01-17
申请号：US16809112
申请日：2020-03-04
摘要： An isolated switch-mode power supply includes at least one input, at least one output, and a power circuit coupled between the at least one input and the at least one output for converting an input voltage or current to an output voltage or current. The power circuit includes a transformer having one or more primary windings, one or more secondary windings, an electrical insulator, and a core magnetically coupling the one or more primary windings and the one or more secondary windings. Upper portions of the primary and secondary windings are covered with the electrical insulator. Other example switchmode power supplies, transformers, magnetic chokes and methods are also disclosed.
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公开(公告)号：US20220387872A1
公开(公告)日：2022-12-08
申请号：US17652378
申请日：2022-06-08
发明人： Israel Gomez Beltran , Zhizhi Li , Siu Lun Wu
摘要： A multi-phase switched-mode power supply includes first and second interleaved phase circuits coupled between input and output terminals. The first phase circuit includes a first inductor coupled with a first switch, and the second phase circuit includes a second inductor coupled with a second switch. A control circuit is configured to output first and second PWM signals to the first and second switches. An on time of the second PWM signal is equal to an on time of the first PWM signal plus a fixed offset time period. The control circuit is configured to determine a period between rising edges of the first PWM signal in order to determine an off trigger PWM signal, and change the second PWM signal to a logical low value when a falling edge of the off trigger PWM signal occurs while the second PWM signal has a logical high value.
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