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公开(公告)号：US20180254707A1
公开(公告)日：2018-09-06
申请号：US15905074
申请日：2018-02-26
Applicant: TDK CORPORATION
Inventor： Ken MATSUURA , Min LIN
IPC: H02M3/158
CPC classification number: H02M3/1584
Abstract: A switching power supply device generates a DC output voltage based on a DC input voltage, and includes n converter units and a control unit. The control unit executes first driving control that drives k1 (where 0≤k1
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公开(公告)号：US20150263631A1
公开(公告)日：2015-09-17
申请号：US14499681
申请日：2014-09-29
Applicant: TDK Corporation
Inventor： Ken MATSUURA , Yoichi ISHIZUKA , Akinori HARIYA
IPC: H02M3/335
CPC classification number: H02M3/33546 , H02M3/33576 , H02M3/3376 , H02M2001/0058 , Y02B70/1491
Abstract: A current resonance DC-DC converter includes a transformer, a switching circuit connected to a primary winding and having a pair of first and second primary side switches which alternately perform ON and OFF operations, an AC-DC conversion circuit connected to a secondary winding and having a pair of first and second secondary side switches which alternately perform the ON and OFF operations and a control circuit that synchronously turns the switches ON and OFF in consideration of a dead time period. The dead time period is provided immediately before and after an ON period of the first and second primary switches. A lag time period is provided immediately before the dead time period. The control circuit turns the first and second secondary side switches ON at the lag time period and turns the first and second secondary side switches OFF at an expiration of the dead time period.
Abstract translation: 电流谐振DC-DC转换器包括变压器，连接到初级绕组的开关电路，并具有交替执行导通和截止操作的一对第一和第二初级侧开关，连接到次级绕组的AC-DC转换电路和 具有交替执行ON和OFF操作的一对第一和第二次级侧开关以及考虑到死区时间周期同步地使开关ON和OFF的控制电路。 在第一和第二主开关的接通时间之前和之后立即提供死区时间。 在死区时间之前提供滞后时间。 控制电路在延迟时间段使第一和第二二次侧开关接通，并且在死区时间期满时使第一和第二次级侧开关断开。
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公开(公告)号：US20190199223A1
公开(公告)日：2019-06-27
申请号：US16228006
申请日：2018-12-20
Applicant: TDK CORPORATION
Inventor： Min LIN , Ken MATSUURA
CPC classification number: H02M3/33523 , H02M1/083 , H02M2001/0058
Abstract: A power converter includes: two DC input terminals that input a DC input voltage; two DC output terminals that output a DC output voltage; an isolation transformer with a primary winding and a secondary winding; a switch that is connected across the two DC input terminals in a state where the switch is connected in series to the primary winding and that switches the DC input voltage; an LC resonance circuit that includes an inductance and a capacitance and is connected in parallel to the primary winding; a first resonant capacitance that is connected in parallel to the switch; a second resonant capacitance that is connected in parallel to the secondary winding; and a rectifying and smoothing circuit that rectifies and smoothes a voltage generated across both ends of the second resonant capacitance and outputs as the DC output voltage across the two DC output terminals.
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公开(公告)号：US20170279310A1
公开(公告)日：2017-09-28
申请号：US15461938
申请日：2017-03-17
Applicant: TDK CORPORATION
Inventor： Akihiro II , Kazunori OSHIMA , Yasuhiro OZAWA , Ken MATSUURA
IPC: H02J50/12
Abstract: A wireless power transmission system includes a power feeding device and a power receiving device, wherein the power feeding device includes: a power feeding coil which receives an electric power to generate an AC magnetic field; an inverter for supplying an alternating-current power under a predetermined driving frequency to the power feeding coil; a current detection circuit for detecting a peak value of an alternating current flowing in the power feeding coil; and a controller for controlling the alternating current flowing in the power feeding coil. The power receiving device includes: a power receiving coil for receiving electric power wirelessly via the AC magnetic field; a power receiving side resonance capacitor which configures a power receiving side LC resonance circuit together with the power receiving coil; and a rectifier for rectifying the electric power received by the power receiving coil.
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公开(公告)号：US20180375441A1
公开(公告)日：2018-12-27
申请号：US16012099
申请日：2018-06-19
Applicant: TDK CORPORATION
Inventor： Min LIN , Ken MATSUURA
CPC classification number: H02M7/523 , H02M7/4826 , H02M2007/4815 , H03F3/2176
Abstract: A power converter includes: input terminals for inputting a DC voltage; output terminals for outputting an AC voltage; a switch; a first resonant capacitance connected between both ends of the switch; a first LC resonance circuit connected in series with the switch between the output terminals; and a second LC resonance circuit connected between the input terminals and the switch. The first LC resonance circuit includes an inductance and a capacitance in series. When the input terminals are shorted, frequency characteristics of an impedance of the second LC resonance circuit include first to fourth resonant frequencies. The first resonant frequency is higher than a switching frequency of the switch. The second and fourth resonant frequencies are around double and four times the switching frequency. The impedance has local maxima at the first and third resonant frequencies and local minima at the second and fourth resonant frequencies.
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Patent Agency Ranking
公开(公告)号：US20150155086A1
公开(公告)日：2015-06-04
申请号：US14499405
申请日：2014-09-29
Applicant: TDK Corporation
Inventor： Ken MATSUURA
CPC classification number: H02M3/24 , H01F27/2804 , H01F2027/2809 , H02M3/28
Abstract: An electronic circuit device includes a board and a transformer that is provided at the board and that has a primary winding member and a secondary winding member. The primary winding member is configured with a primary winding that is provided at the board and a primary side element that is electrically connected to the primary winding member. The secondary winding member is configured with a secondary winding that is provided at the board and a secondary side element that is electrically connected to the secondary winding member.
Abstract translation: 电子电路装置包括设置在板上并具有初级绕组构件和次级绕组构件的基板和变压器。 初级绕组构件具有设置在基板上的初级绕组和与初级绕组构件电连接的初级侧构件。 次级绕组构件具有设置在板上的次级绕组和与次级绕组构件电连接的次级侧元件。
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公开(公告)号：US20200106354A1
公开(公告)日：2020-04-02
申请号：US16574276
申请日：2019-09-18
Applicant: TDK CORPORATION
Inventor： Ken MATSUURA
Abstract: The switching power supply device includes an AC voltage input unit, a filter, a first inductor, a switching unit, a first rectification unit that includes first and second rectifier elements, in which the first and second rectifier elements are connected in series, in which a second output terminal of the AV voltage input unit is electrically connected to a transmission line, which connects the first and second rectifier elements, via the filter, and that is connected in parallel to the switching unit, a first capacitor, an inverter, a second rectification unit that includes an input terminal which is connected to a secondary coil, a smoothing unit that is connected between the output terminals of the second rectification unit, a control unit, a second capacitor that is connected between a transmission line, which connects the first and second rectifier element, and the smoothing unit, and a twentieth capacitor.
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8.发明申请公开(公告)号：US20190319528A1
公开(公告)日：2019-10-17
申请号：US16380077
申请日：2019-04-10
Applicant: TDK CORPORATION
Inventor： Ken MATSUURA , Min LIN
Abstract: A switching power supply includes a power converter with an inductor and first and second switches that converts a voltage Vac to a voltage Vdc, a detector with a winding that detects zero timing of an inductor current, and a driving signal generator that switches on the second switch based on the zero timing and then switches on the first switch. The driving signal generator ends a period T2 before the zero timing by executing a measuring process for an on period T1 of the second switch, a process that calculates the period T2 from T2=T1×|Vac|/(Vdc−|Vac|)−Tc using a correction time Tc, a process that switches on the first switch for only the period T2, a process that measures an elapsed time between the periods T2 and T1, and a process that changes the correction time Tc so that the elapsed time becomes a target time.
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公开(公告)号：US20180375504A1
公开(公告)日：2018-12-27
申请号：US16017121
申请日：2018-06-25
Applicant: TDK CORPORATION
Inventor： Min LIN , Ken MATSUURA
IPC: H03K17/0416 , H03K17/0412 , H02M1/38 , H03B5/12
Abstract: A FET driving circuit includes: inputs into which a DC voltage is inputted; outputs connected to gate and source electrodes of a FET; a switch; a capacitance connected across the switch; and an LC resonance circuit connected in series with the switch across the inputs. A voltage generated across the switch during switching is outputted to drive the FET. The LC resonance circuit has a first connector connected to one input and a second connector connected to the switch, and is configured with a path including an inductance and a path including an inductance and a capacitance. An impedance between the first and second connectors has two resonant frequencies. The impedance has a local maximum at the lower resonant frequency, which is higher than a switching frequency, and a local minimum at the higher resonant frequency, which is around double the switching frequency.
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公开(公告)号：US20230125248A1
公开(公告)日：2023-04-27
申请号：US17908149
申请日：2021-01-29
Applicant: TDK CORPORATION
Inventor： Ken MATSUURA
Abstract: A transformer includes a magnetic core, a first coupling terminal, a second coupling terminal, a first winding, and one or multiple second windings. The magnetic core includes two opposed base parts, and five leg parts including first to fifth leg parts disposed within opposed surfaces of the base parts and magnetically coupling the base parts. The second and third leg parts are disposed with the first leg part interposed therebetween in a first direction. The fourth and fifth leg parts are disposed with the first leg part interposed therebetween in a second direction. The first winding is, in a direction from the first coupling terminal to the second coupling terminal, wound around the first to third leg parts in a first winding direction, and around the fourth and fifth leg parts in a second winding direction. The second winding/windings is/are wound around the leg parts except the first leg part.
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