-
公开(公告)号：US20140376274A1
公开(公告)日：2014-12-25
申请号：US14481031
申请日：2014-09-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI , Naoki YAMAGUCHI
IPC: H02M3/335
CPC classification number: H02M3/33546 , H01F27/325 , H01F38/06 , H02M3/33569 , H02M2001/0058 , Y02B70/1491
Abstract: In a switching power supply device, a partition portion that includes a slit divides a winding portion of a bobbin. A primary winding of a transformer is wound to a height h1 in a first section, and a secondary winding is wound to a height h2 in a second section. A low side drive winding and a high side drive winding are wound around the primary winding to a height h3 with the high side drive winding being located toward the secondary winding.
Abstract translation: 在开关电源装置中，包括狭缝的分隔部将线轴的卷绕部分分割。 变压器的初级绕组被缠绕到第一部分中的高度h1，并且次级绕组被卷绕到第二部分中的高度h2。 低侧驱动绕组和高侧驱动绕组围绕初级绕组缠绕到高度h3，高侧驱动绕组朝向次级绕组。
-
公开(公告)号：US20140268899A1
公开(公告)日：2014-09-18
申请号：US14252862
申请日：2014-04-15
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI
IPC: H02M3/335
CPC classification number: H02M3/33507 , H02M3/33569 , H02M3/33576 , H02M7/4826 , H02M2001/0058 , H02M2007/4815 , Y02B70/1433 , Y02B70/1491
Abstract: A primary side resonant circuit is formed by a primary side resonant inductor and a primary side resonant capacitor, and secondary side resonant circuits are formed by secondary side resonant inductors and secondary side resonant capacitors. Equivalent mutual inductances and equivalent mutual capacitances are formed through electromagnetic field resonant coupling between a primary winding and secondary windings, and a multi-resonant circuit including an LC resonant circuit formed in each of the primary side and the secondary side is formed. Electric power is transmitted from the primary side circuit to the secondary side circuit, and resonant energy that is not transmitted from the primary winding and, of energy which the secondary winding has received, resonant energy that is not supplied to an output are each retained in the multi-resonant circuit.
Abstract translation: 初级侧谐振电路由初级侧谐振电感器和初级侧谐振电容器构成，次级侧谐振电路由次级侧谐振电感器和次级侧谐振电容器构成。 通过初级绕组和次级绕组之间的电磁场谐振耦合形成等效互感和等效互电容，并且形成包括在初级侧和次级侧中形成的LC谐振电路的多谐振电路。 电力从初级侧电路传输到次级侧电路，并且没有从初级绕组传递的谐振能量和次级绕组接收到的能量的谐振能量不被提供给输出端的谐振能量保持在 多谐振电路。
-
公开(公告)号：US20140254207A1
公开(公告)日：2014-09-11
申请号：US14176405
申请日：2014-02-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI
IPC: H02M3/335
CPC classification number: H02M3/33507 , H02M3/33569 , H02M3/3385
Abstract: In a switching power supply device, a voltage of a counter electromotive force induced in a drive winding as a high side switching element is turned off is output to a ZT terminal of a switching control IC, and thus an OUT terminal of the switching control IC is brought to a high level, and thus a low side switching element is turned on. A constant current circuit charges a capacitor with a constant current through a voltage at the OUT terminal. A comparator in the switching control IC inverts the voltage at the OUT terminal to a low level upon a voltage at an IS terminal exceeding a voltage at an FB terminal. Thus, an on time of the low side switching element is controlled in accordance with a voltage output to the FB terminal, and an output voltage Vo is turned into a constant voltage.
Abstract translation: 在开关电源装置中，在作为高侧开关元件的驱动绕组中感应出的反电动势的电压被截止，输出到开关控制IC的ZT端，因此切换控制IC的OUT端 被带到高电平，因此低侧开关元件导通。 恒流电路通过OUT端的电压以恒定电流对电容器充电。 开关控制IC中的比较器在IS端子处的电压超过FB端子处的电压时将OUT端子处的电压反相到低电平。 因此，根据向FB端子输出的电压来控制低侧开关元件的导通时间，并且输出电压Vo变为恒定电压。
-
公开(公告)号：US20130300210A1
公开(公告)日：2013-11-14
申请号：US13944908
申请日：2013-07-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI
CPC classification number: H01F38/14 , H02J5/005 , H02J7/025 , H02J17/00 , H02J50/12 , H02J50/50 , H02J50/80 , H02M3/3376 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: A power-transmission-unit-side resonant circuit includes a resonant capacitor connected in series with a power transmission coil and a power-reception-unit-side resonant circuit including a resonant capacitor connected in series with a power reception coil resonate with each other to cause sympathetic vibration. This allows power to be transferred using two kinds of coupling via the magnetic field and the electric field between the power transmission coil and the power reception coil. Also, operation is performed at a switching frequency that is higher than a specific resonant frequency of the entire multi-resonant circuit, such that a ZVS operation is performed. As a result, a switching loss is reduced by a large amount and a highly efficient operation is performed thus enabling a power transfer system with a reduced size and an increased power conversion efficiency to be provided.
Abstract translation: 电力传输单元侧谐振电路包括与电力传输线圈串联连接的谐振电容器和包括与受电线圈串联连接的谐振电容器的受电单元侧谐振电路彼此谐振， 引起交感振动。 这允许通过磁场和电力传输线圈和受电线圈之间的电场的两种耦合来传递功率。 此外，以比整个多谐振电路的特定谐振频率高的开关频率进行操作，使得执行ZVS操作。 结果，大量地减少了开关损耗，并且执行了高效率的操作，从而能够提供具有减小的尺寸和提高的功率转换效率的功率传输系统。
-
公开(公告)号：US20250096673A1
公开(公告)日：2025-03-20
申请号：US18887576
申请日：2024-09-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI , Hiroyuki TAKATSUJI
Abstract: A switching power supply device includes a power conversion circuit including input and output capacitors, a switching element, and an inductor, and a common-mode choke coil that is between a DC power supply and the power conversion circuit and includes a core material around which first and second windings are linearly wound and aligned by being turned in one direction. The power conversion circuit and the common-mode choke coil constitute a noise equalization circuit that is an electric closed circuit including a low-frequency band blocking filter including an input capacitor and a mutual inductance of the common-mode choke coil, and a high-frequency band blocking filter including the mutual inductance and a stray capacitance of the common-mode choke coil. The noise equalization circuit cancels out noise generated by a switching operation of the switching element in each of a low-frequency band and a high-frequency band different from the low-frequency band.
-
Patent Agency Ranking
公开(公告)号：US20230327546A1
公开(公告)日：2023-10-12
申请号：US18335058
申请日：2023-06-14
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI , Hiroyuki TAKATSUJI , Yuki ISHIKURA
CPC classification number: H02M1/44 , H02M3/156 , H02M3/33571
Abstract: A switching power supply device includes power supply input lines, DC output lines, a DC-DC converter circuit, and a noise reduction circuit. The noise reduction circuit includes a first half-bridge capacitor circuit that is connected between the power supply input lines, a second half-bridge capacitor circuit that is connected between the DC output lines, a first common mode choke coil, and an electrical path. The electrical path electrically connects a midpoint of the first half-bridge capacitor circuit to a midpoint of the second half-bridge capacitor circuit.
-
公开(公告)号：US20230276573A1
公开(公告)日：2023-08-31
申请号：US18313180
申请日：2023-05-05
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Osamu MIKI , Tatsuya HOSOTANI
CPC classification number: H05K1/14 , H02M3/003 , H05K1/181 , H05K2201/044
Abstract: A circuit module includes a circuit module substrate having an area smaller than a large-scale circuit board, an electronic circuit component mounted on the circuit module substrate, a connection pin provided to the circuit module substrate, and a circuit-module-substrate-side fitting structure part provided to the circuit module substrate. A pin receptacle and the connection pin are electrically connected to each other. A non-conductive thermal adhesive layer is formed between a surface of the circuit module substrate and a surface of a base material of the large-scale circuit board facing to each other, the non-conductive thermal adhesive layer electrically insulating and thermally joining the surfaces by a non-conductive thermally conductive material.
-
公开(公告)号：US20230275465A1
公开(公告)日：2023-08-31
申请号：US18311162
申请日：2023-05-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI
CPC classification number: H02J50/12 , H02J7/007 , H02J7/00308 , H02M3/157 , H02J50/80
Abstract: A wireless power reception circuit system includes a wireless power reception circuit, an electric storage device, a load unit, a digital control circuit, a voltage conversion circuit, a DC-DC converter, smoothing capacitors, a voltage OR circuit, and an external signal setting circuit for resetting the digital control circuit. An enable signal input terminal of the voltage conversion circuit is in a disabled state when the voltage conversion circuit is not controlled by the digital control circuit. The digital control circuit supplies an enable signal to the enable signal input terminal of the voltage conversion circuit when operating the voltage conversion circuit.
-
公开(公告)号：US20230147880A1
公开(公告)日：2023-05-11
申请号：US18067553
申请日：2022-12-16
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI
CPC classification number: H02J50/12 , H02M1/0009
Abstract: A wireless power transmission apparatus includes a power transmission resonance mechanism including a wireless power transmission coil and a power transmission resonance capacitor; a power transmission circuit that performs switching of the power transmission resonance mechanism at a predetermined switching frequency; a voltage conversion circuit that performs voltage conversion on an input power supply voltage; an intermediate capacitor between the voltage conversion circuit and the power transmission circuit and shared between the voltage conversion circuit and the power transmission circuit; an intermediate input current detection circuit that detects an intermediate input current input to the power transmission circuit from the voltage conversion circuit; and an electric power management circuit that, by setting an upper limit value for the intermediate input current and controlling an output voltage of the voltage conversion circuit, adjusts the amplitude of a DC voltage or current intermittently provided to the power transmission resonance mechanism.
-
公开(公告)号：US20230128671A1
公开(公告)日：2023-04-27
申请号：US18068473
申请日：2022-12-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI
Abstract: A wireless power transfer system comprises a power transmission device and a power reception device. The power reception device includes a power reception coil that wirelessly magnetically couples with a power transmission coil included in the power transmission device. The power transmission device includes a switching circuit in which switch elements perform switching operations, an input voltage adjustment circuit that is electrically connected to the switching circuit and adjusts an input voltage, and an MPU. The MPU is configured to recognize a power requirement presented by the power reception device, control the input voltage adjustment circuit and control intermittent oscillation of the switching circuit, and adjust the input voltage to prevent an oscillation stop period of the intermittent oscillation from exceeding a predetermined stop period.
-
-
-
-
-
-
-
-
-
Search Results
97
records
(took 0.018 seconds)
