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公开(公告)号：US20240405592A1
公开(公告)日：2024-12-05
申请号：US18700429
申请日：2022-10-21
Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION
Inventor： Mahesh M. Swamy
Abstract: Battery pack chargers for charging a battery pack include one or more battery pack receiving portions, a power control module, and a power conversion unit. The one or more battery pack receiving portions receive and interface with the battery pack. The battery pack includes one or more battery cells. The power control module provides power to the one or more battery pack receiving portions using pulse amplitude modulation (PAM). The power conversion unit converts the power received from the first external source to a first DC power used for charging the one or more battery cells.
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公开(公告)号：US12160232B2
公开(公告)日：2024-12-03
申请号：US18351760
申请日：2023-07-13
Applicant: Allegro MicroSystems, LLC
Inventor： Karl Rinne , Joseph Duigan
IPC: H03K17/691 , H02M1/08 , H02M3/335 , H02M1/42
Abstract: Switch drive circuits include galvanically isolated switch circuits with power transfer from the switch driver input side to the switch side. A switch drive circuit uses a single transformer to transfer control signals to a secondary side for control of the switch along with power to a secondary side circuit to drive the switch in response to the control signals. By detecting the control signal first before drawing current, the effects of leakage inductance in the transformer are reduced.
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公开(公告)号：US20240396473A1
公开(公告)日：2024-11-28
申请号：US18321287
申请日：2023-05-22
Applicant: Apple Inc.
Inventor： Vijay G. Phadke , Liang Zhou
IPC: H02M7/5387 , H02M1/14 , H02M1/42
Abstract: An AC-DC power supply can include a PFC stage that receives a rectified AC input voltage and produces an intermediate DC bus voltage; a DC-DC stage that receives the intermediate DC bus voltage and produces a regulated DC output voltage; and a digital controller. The digital controller can include a relatively faster DC-DC stage controller that receives DC-DC stage feedback signal(s) and produces DC-DC drive signal(s) for switching device(s) of the DC-DC stage; a relatively slower PFC stage controller that receives PFC feedback signal(s) and produces PFC drive signal(s) for switching device(s) of the PFC stage; and control logic that receives periodic output power indications of the AC-DC power supply and uses them to cause the PFC drive signal(s) to respond to a change in output power of the AC-DC power supply more quickly than would be achieved by the relatively slower PFC stage controller.
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24.发明申请公开(公告)号：US20240396465A1
公开(公告)日：2024-11-28
申请号：US18687036
申请日：2021-11-09
Applicant: Mitsubishi Electric Corporation
Inventor： Tomohiro KUTSUKI , Koyo MATSUZAKI , Koichi ARISAWA , Takaaki TAKAHARA , Haruka MATSUO
Abstract: A power conversion device includes a converter that rectifies a first alternating-current power supplied from an alternating-current power supply and boosts a voltage of the power rectified; a smoothing unit connected to an output end of the converter; and a control unit that controls the converter to cause an input current to the converter to change in accordance with at least one of a first frequency or a second frequency, and that reduces a current flowing to the smoothing unit, the first frequency being a frequency of pulsation of input power to a load unit connected across the smoothing unit, the second frequency being a frequency of pulsation of input power to the converter due to a frequency of the alternating-current power supply.
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公开(公告)号：US20240396443A1
公开(公告)日：2024-11-28
申请号：US18652402
申请日：2024-05-01
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Gregory SZCZESZYNSKI
Abstract: In a power converter that includes a switched-capacitor circuit connected to a switched-inductor circuit, reconfiguration logic causes the switched-capacitor circuit to transition between first and second switched-capacitor configurations with different voltage-transformation ratios. A compensator compensates for a change in the power converter's forward-transfer function that would otherwise result from the transition between the two switched-capacitor configurations.
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Patent Agency Ranking
公开(公告)号：US20240396438A1
公开(公告)日：2024-11-28
申请号：US18694377
申请日：2022-09-16
Applicant: GS Yuasa International Ltd.
Inventor： Akiteru CHIBA , Keita ISHIKURA
Abstract: A power factor correction circuit includes a series circuit in which a reactor L and a control switch Q1 are connected in series to both ends of a rectifier circuit 2 that rectifies input voltage of an AC power supply, a series circuit in which a synchronous rectification switch Q2 and an output capacitor C1 are connected to two main terminals of the control switch, and a control circuit 10 that alternately turns on and off the control switch and the synchronous rectification switch so that output voltage of the output capacitor becomes a first predetermined value and controls ON time of the control switch so that a peak value of current flowing through the control switch is proportional to input voltage. The control circuit turns on and off the control switch and the synchronous rectification switch so as to adjust a reverse excitation amount for reverse excitation of the reactor by causing current flowing through the reactor to reversely flow from the output voltage side to the input voltage side, and the reverse excitation amount is adjusted to a second predetermined value regardless of input voltage Vi.
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公开(公告)号：US12156303B2
公开(公告)日：2024-11-26
申请号：US17888214
申请日：2022-08-15
Applicant: STMicroelectronics S.r.l.
Inventor： Claudio Adragna , Giovanni Gritti
IPC: H05B45/10 , H02M1/42 , H05B45/385
Abstract: A control circuit includes: a flip-flop having an output configured to be coupled to a control terminal of a transistor and for producing a first signal; a comparator having an output coupled to an input of the flip-flop, and first and second inputs for receiving first and second voltages, respectively; a transconductance amplifier having an input for receiving a sense voltage indicative of a current flowing through the transistor, and an output coupled to the first input of the comparator; a zero crossing detection (ZCD) circuit having an input configured to be coupled to a first current path terminal of the transistor and to an inductor, where the ZCD circuit is configured to detect a demagnetization time of the inductor and produce a third signal based on the detected demagnetization time; and a reference generator configured to generate the second voltage based on the first and third signals.
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公开(公告)号：US12155312B2
公开(公告)日：2024-11-26
申请号：US17872481
申请日：2022-07-25
Applicant: Infineon Technologies Austria AG
Inventor： Alfredo Medina-Garcia
Abstract: A controller of a power converter including a first power stage and a second power stage receives an indication of an output voltage of the power converter, where the indication is measured at the primary side of the power converter. Based on the indication, a control related to an intermediate voltage of the power converter is performed.
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29.发明申请公开(公告)号：US20240388198A1
公开(公告)日：2024-11-21
申请号：US18318082
申请日：2023-05-16
Applicant: Infineon Technologies Austria AG
Inventor： Andrey Malinin , Renato Bessegato
IPC: H02M1/42
Abstract: A multi-phase PFC (power factor correction) system, controller, and method of controlling the multi-phase PFC system are described. The method includes operating the phases under variable frequency control to interleave current delivered by the plurality of phases to a load. During a switching cycle for the phases, a phase synchronization correction indicator is activated if a predetermined crossing point along a rising or falling slope of the current delivered by a second phase is misaligned with the same predetermined crossing point along the opposite slope of the current delivered by a first phase. During the next switching cycle, a switching period of the second phase is adjusted if the phase synchronization correction indicator was activated during the previous switching cycle.
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公开(公告)号：US12132403B1
公开(公告)日：2024-10-29
申请号：US17939820
申请日：2022-09-07
Applicant: Vicor Corporation
Inventor： Patrizio Vinciarelli
CPC classification number: H02M3/1584 , H02M1/4241 , H02M3/33523 , H02M3/33569 , H02M1/0003 , H02M1/0058
Abstract: An isolated, power factor corrected, converter, for operation from a three-phase AC source, comprises three power processors, each power processor connected to one of the three phases. Each power processor comprises a cascade of a first and a second power conversion stage. At least one of the first and second power converters in each power processor is configured to provide galvanic isolation through a DC Transformer between the power processor input and output. At least one of the first and second power converters in each power processor is configured to provide power factor correction at the AC source. Substantially all of the bulk energy storage and low frequency filtering is provided by storage elements at the output of the power system. Low voltage semiconductor devices may be cascaded to implement low output capacitance high voltage switches in a multi-cell resonant converter for high voltage applications.
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