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公开(公告)号：US20220153213A1
公开(公告)日：2022-05-19
申请号：US17428308
申请日：2020-03-30
Inventor： HIDEKI TANAKA
IPC: B60R16/033 , H02J7/00 , H02M1/00
Abstract: An in-vehicle power supply device includes an input end configured to be connected to an in-vehicle secondary battery, an output end configured to be connected to an in-vehicle load, an external signal input port configured to receive an activation signal, a first converter unit connected to the input end and the output end, and a second converter unit connected in parallel to the first converter unit. The first converter unit includes a first drive power supply configured to constantly receive power suppled from the input end, and a first voltage converter operable in response to the power received by the first drive power supply to constantly output power from the output end. The second converter unit includes a second drive power supply activated by the activation signal received by the external signal input port, a converter controller configured to start to operate in response to the activating of the second drive power supply, and a second voltage converter configured to start to operate in response to the starting of the operating of the converter controller so as to output power from the output end. The in-vehicle power supply device increases power efficiency.
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公开(公告)号：US20220416665A1
公开(公告)日：2022-12-29
申请号：US17756657
申请日：2020-12-01
Inventor： HIDEKI TANAKA , TAKESHI NAKAYASHIKI
IPC: H02M3/158
Abstract: A polyphase power-supply device includes first to N-th DC-DC converters connected in parallel to each other between an input terminal and an output terminal and a switching controller configured to perform interleave control on the first to N-th DC-DC converters by supplying first to N-th pulse width modulation (PWM) signals to the first to N-th DC-DC converters, respectively, where N is any integer equal to or greater than two. A switching frequency of the first PWM signal is changed at a change time point at which a cycle of the first PWM signal starts. A length of a cycle of the k-th PWM signal firstly appearing after the change time point is shorter than lengths of subsequent cycles of the k-th PWM signal appearing the first cycle of the k-th PWM signal. This polyphase power-supply device has high reliability.
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公开(公告)号：US20160049234A1
公开(公告)日：2016-02-18
申请号：US14784031
申请日：2014-04-16
Inventor： TAKUJI KAWASHIMA , YOSHIHARU OMORI , HIDEKI TANAKA
CPC classification number: H01F27/2804 , H01F17/0013 , H01F27/292 , H01F41/041 , H01F2017/002 , H01F2017/0093
Abstract: A common mode noise filter includes: a laminated body; and a first and second coil conductors that are formed inside the laminated body and face each other in a first direction, wherein the first coil conductor has a first surface facing the second coil conductor; the second coil conductor has a second surface facing the first surface; a distance between ends of the first and second surfaces in the first direction is longer than a distance between centers of the first and second surfaces in the first direction; the first and second surfaces have corners each formed into an arcuate shape in a cross section; and a relationship between a height h in the first direction and a width w in a second direction perpendicular to the first direction is h≧w in a cross section of each of the first and second coil conductors.
Abstract translation: 共模噪声滤波器包括：层叠体; 以及第一和第二线圈导体，其形成在所述层叠体内并且在第一方向上彼此面对，其中所述第一线圈导体具有面向所述第二线圈导体的第一表面; 所述第二线圈导体具有面向所述第一表面的第二表面; 所述第一和第二表面的所述第一方向的端部之间的距离比所述第一和第二表面的所述第一方向的中心之间的距离长; 第一表面和第二表面在横截面中形成为弧形; 并且在第一和第二线圈导体的每一个的截面中，第一方向上的高度h与垂直于第一方向的第二方向的宽度w之间的关系为h≥w。
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Patent Agency Ranking
公开(公告)号：US20200303108A1
公开(公告)日：2020-09-24
申请号：US16603584
申请日：2018-07-24
Inventor： MASAKATSU NAWATE , ATSUSHI SHINKAI , HIDEKI TANAKA , TAKUJI KAWASHIMA , TAKESHI ICHIHARA
Abstract: A common mode noise filter includes an insulating layer, a first coil conductor disposed on a first surface of the insulating layer and extending slenderly, and a second coil conductor disposed on a second surface of the insulating layer and extending slenderly. The second coil conductor faces the first coil conductor across the insulating layer. A portion of the second coil conductor has a cross section crossing a direction in which the portion of the second coil conductor extends slenderly. The cross section includes an apex portion facing the first coil conductor across the insulating layer and a base side portion opposite to the apex portion. A width of the apex portion is smaller than a width of the base-side portion. The common mode noise filter reduces attenuation of differential signals in high frequencies.
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公开(公告)号：US20210304942A1
公开(公告)日：2021-09-30
申请号：US17266693
申请日：2019-11-11
Inventor： TAKUJI KAWASHIMA , MASAKATSU NAWATE , YU ONODERA , HIDEKI TANAKA
Abstract: An object of the present disclosure is to provide a common mode noise filter that can be used in a high-frequency band. The common mode noise filter of the present disclosure includes first to fifth insulator layers and stacked body in which first to fifth insulator layers are stacked along a vertical direction. The common mode noise filter further includes first spiral conductor and second spiral conductor that are formed inside stacked body and face each other across first insulator layer. The common mode noise filter further includes first pad connected to an inner end of first spiral conductor and second pad connected to an inner end of second spiral conductor. Neither first pad nor second pad overlaps each of first spiral conductor and second spiral conductor in top view.
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公开(公告)号：US20150357917A1
公开(公告)日：2015-12-10
申请号：US14763279
申请日：2014-01-30
Inventor： MASASHI OKAMATSU , HIDEKI TANAKA , KATSUYA HAGIWARA , MASAHIRO TOCHIGI , TAKASHI UEDA
IPC: H02M3/158
CPC classification number: H02M3/158 , H02M1/08 , H02M3/1582 , H02M2001/0006
Abstract: A DC-DC converter includes first and second switching devices electrically connected in series between an input terminal and a ground terminal, third and fourth switching devices electrically connected in series between an output terminal and the ground terminal, an inductor, a drive circuit that drives the first switching device to turn on and off, a bootstrap capacitor circuit connected electrically to the drive circuit, and a control circuit. The control circuit is operable to turn on and off the switching devices serially connected with each other after a simultaneous-off duration for which both of the switching devices are continuously turned off. The control circuit is operable to charge the bootstrap capacitor by continuously turning on keeping the second switching device for a charging duration while continuously turning off the first switching device for a sustaining duration determined by the simultaneous-off duration and the charging duration. This DC-DC converter can reduce a current ripple even when the bootstrap capacitor is charged.
Abstract translation: DC-DC转换器包括串联地电连接在输入端子和接地端子之间的第一和第二开关装置，串联地电连接在输出端子和接地端子之间的第三和第四开关装置，电感器，驱动电路 第一开关装置接通和断开，与驱动电路电连接的自举电容电路和控制电路。 控制电路可操作以在两个开关装置连续断开的同时关断持续时间之后导通和断开彼此串联的开关装置。 所述控制电路可操作以通过在连续地打开所述第二开关装置一个充电持续时间的同时对所述自举电容器进行充电，同时连续地关闭所述第一开关装置持续由所述同时关断持续时间和所述充电持续时间确定的持续时间。 即使自举电容充电，该DC-DC转换器也可以减小电流纹波。
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公开(公告)号：US20220216791A1
公开(公告)日：2022-07-07
申请号：US17607024
申请日：2020-06-01
Inventor： HIDEKI TANAKA , TAKESHI NAKAYASHIKI
Abstract: An in-vehicle power supply system includes a high-voltage direct-current (DC) power supply, a low-voltage storage battery, a DC-DC converter, and a controller. The DC-DC converter includes a conversion circuit including a high-voltage terminal and a low-voltage terminal, an input switch connected between the high-voltage DC power supply and the high-voltage terminal, and an output switch connected between the low-voltage terminal and the low-voltage storage battery. The controller is configured to, after detecting that a current flowing through the conversion circuit exceeds a predetermined current threshold or that a charge voltage of the low-voltage storage battery exceeds a predetermined voltage threshold, execute a failure determination of the DC-DC converter after instructing the conversion circuit to stop a voltage conversion operation, causing the input switch to switch to the disconnected state, and instructing the output switch to switch to the disconnected state. The controller is configured to, in the failure determination execute a first determination operation including an output short-circuit failure determination, an output open-circuit failure determination, and an input short-circuit failure determination. If determining, in the first determination operation, that the output switch does not have failure, controller is configured to execute a second determination operation of determining whether or not the conversion circuit has failure. If determining, in the second determination operation, that the conversion circuit does not have failure, the controller is configured to execute a third determination operation of determining whether or not the input switch has failure. The in-vehicle power supply device determines the location of failure easily.
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公开(公告)号：US20210028752A1
公开(公告)日：2021-01-28
申请号：US17040362
申请日：2019-03-11
Inventor： TAKUJI KAWASHIMA , NARIAKI ISHIDA , HIDEKI TANAKA
Abstract: The present disclosure provides a common mode noise filter that can improve attenuation characteristics of common mode noise over a wide frequency range. The common mode noise filter of the present disclosure includes: two magnetic sections and each of which is made of a magnetic material; and non-magnetic section disposed between magnetic sections in a stacking direction, non-magnetic section being made of a non-magnetic material. Moreover, the common mode noise filter further includes two coils and metal layer. Coils are disposed inside non-magnetic section while facing each other. Metal layer is formed inside at least one of two magnetic sections while being connected to the ground. Metal layers are positioned closer to a lower surface of magnetic section than an upper surface of magnetic section and closer to an upper surface of magnetic section than a lower surface of magnetic section.
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