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公开(公告)号：US09667171B2
公开(公告)日：2017-05-30
申请号：US14723515
申请日：2015-05-28
Inventor： Shoichi Hara , Kazuyuki Sakiyama
IPC: H02M7/538 , H02M7/5387 , B60L3/00 , B60L11/18 , B60L15/00 , H02M1/088 , H02M3/335 , H02M3/337 , H02M1/00
CPC classification number: H02M7/5387 , B60L3/003 , B60L11/1812 , B60L11/1833 , B60L11/1877 , B60L15/007 , B60L2210/10 , B60L2210/30 , B60L2210/40 , B60L2240/36 , B60L2240/525 , H02M1/088 , H02M3/33507 , H02M3/3376 , H02M2001/0058 , H02M2007/53878 , Y02T10/645 , Y02T10/7005 , Y02T10/705 , Y02T10/7072 , Y02T10/7216 , Y02T10/7241 , Y02T10/92 , Y02T90/12 , Y02T90/121 , Y02T90/125 , Y02T90/127 , Y02T90/14
Abstract: A switching circuit according to an aspect of the present disclosure includes: a full-bridge circuit including a first leg that includes a first switch and a second switch, and a second leg that includes a third switch and a fourth switch; and a control circuit operative to (a) output a first control signal group that changes the first leg into a state in which the third switch is off and the fourth switch is on after changing the first leg into a state in which the first switch is on and the second switch is off, and (b) output a second control signal group that changes the second leg into a state in which the third switch is off and the fourth switch is on before changing the first leg into a state in which the first switch is on and the second switch is off.
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公开(公告)号：US09660546B2
公开(公告)日：2017-05-23
申请号：US14636995
申请日：2015-03-03
Inventor： Akira Kato , Kazuyuki Sakiyama , Hirohide Ichihashi
Abstract: A coil structure includes: a magnetic core that defines a closed loop magnetic path in which a magnetic flux flows, the magnetic core including a core leg; a coil that is wound around the core leg about a coil axis extending in a first direction, the coil generating the magnetic flux; a detour member that is separate from the magnetic core, the detour member defining a detour magnetic path that detours around the closed loop magnetic path between first and second points, the detour member including a first piece that defines the first point and a second piece that defines the second point; and a fixing portion that includes an adjoining member adjoining the core leg and a connecting portion connecting at least one of the first piece and the second piece to the adjoining member and fixes positional relations among the core leg and the first and second points.
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公开(公告)号：US09852841B2
公开(公告)日：2017-12-26
申请号：US14596446
申请日：2015-01-14
Inventor： Kazuyuki Sakiyama , Akira Kato , Takehiko Yamakawa , Eiji Takahashi
IPC: H01F27/28 , H01F27/30 , H01F41/061
CPC classification number: H01F27/2847 , H01F27/303 , H01F27/306 , H01F41/061
Abstract: A coil structure includes a conductor band and a first insulating plate. The conductor band turns around a coil axis in such a manner that the conductor band folds at a plurality of portions which form a plurality of folded portions. The first insulating plate includes a first edge portion which abuts along at least one of the plurality of folded portions. At least part of the conductor band is wound around the first insulating plate.
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公开(公告)号：US09667153B2
公开(公告)日：2017-05-30
申请号：US14785530
申请日：2014-05-27
Inventor： Shoichi Hara , Kazuyuki Sakiyama , Akira Minegishi
CPC classification number: H02M3/33507 , B60L11/1811 , H02M3/3353 , H02M2001/0032 , H02M2001/0058 , Y02B70/1491 , Y02B70/16
Abstract: A switching power supply apparatus includes: an DC/AC converter unit for converting a DC voltage to an AC voltage based on switching operation of switching devices; a transformer for converting the AC voltage to an AC voltage having a voltage value; a resonance circuit provided between the DC/AC converter unit and the transformer; an AC/DC converter circuit for converting an AC voltage from the transformer to a DC; an output detector unit for detecting an output voltage or an output current of the apparatus; a duty ratio controller unit for controlling a duty ratio of switching of the apparatus such that a detected output voltage or current becomes a target value; an energy detector unit for detecting an energy accumulated in the resonance circuit; and a controller unit for controlling a switching frequency such that a detected energy becomes a threshold value.
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公开(公告)号：US20230207243A1
公开(公告)日：2023-06-29
申请号：US18112376
申请日：2023-02-21
Inventor： Takehiko Yamakawa , Kazuyuki Sakiyama , Akira Kato
CPC classification number: H01H50/546 , H01H47/22 , H01H50/18 , H01H50/36 , H01H50/44
Abstract: An electromagnetic relay includes a fixed contact, a moving contact, an electromagnet device, and a second coil. The moving contact moves from a closed position where the moving contact is in contact with the fixed contact to an open position where the moving contact is out of contact with the fixed contact, and vice versa. The electromagnet device includes a first coil and a mover. The mover is actuated on receiving a magnetic flux generated when a current flows through the first coil to move the moving contact from one of the closed position or the open position to the other position. The second coil gives, when a current flows through the second coil, at least a magnetic flux, of which a direction is opposite from a direction of the magnetic flux generated by the first coil, to the mover.
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Patent Agency Ranking
公开(公告)号：US12101034B2
公开(公告)日：2024-09-24
申请号：US17441184
申请日：2020-02-14
Inventor： Akira Kato , Motohiko Fujimura , Kazuyuki Sakiyama , Takehiko Yamakawa , Taiki Nishimoto
CPC classification number: H02M3/33573 , H02M1/0064 , H02M3/003 , H02M3/015
Abstract: A power conversion device is equipped with at least one leg circuit containing two switching elements connected in series, respectively, a transformer having a primary winding and a secondary winding, a capacitor connected between the leg circuit and one end of the primary winding, a switch circuit, and a rectifier circuit. The switch circuit selectively connects one of a plurality of winding sections of the secondary winding that are different from each other to the rectifier circuit.
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公开(公告)号：US12057282B2
公开(公告)日：2024-08-06
申请号：US18112376
申请日：2023-02-21
Inventor： Takehiko Yamakawa , Kazuyuki Sakiyama , Akira Kato
CPC classification number: H01H50/546 , H01H47/22 , H01H50/18 , H01H50/36 , H01H50/44
Abstract: An electromagnetic relay includes a fixed contact, a moving contact, an electromagnet device, and a second coil. The moving contact moves from a closed position where the moving contact is in contact with the fixed contact to an open position where the moving contact is out of contact with the fixed contact, and vice versa. The electromagnet device includes a first coil and a mover. The mover is actuated on receiving a magnetic flux generated when a current flows through the first coil to move the moving contact from one of the closed position or the open position to the other position. The second coil gives, when a current flows through the second coil, at least a magnetic flux, of which a direction is opposite from a direction of the magnetic flux generated by the first coil, to the mover.
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公开(公告)号：US11373828B2
公开(公告)日：2022-06-28
申请号：US17040966
申请日：2019-02-12
Inventor： Akira Kato , Kazuyuki Sakiyama , Takehiko Yamakawa , Motohiko Fujimura
Abstract: An electromagnet device moves two moving contacts from one of a closed position or an open position to the other position when an electric current flows through a coil. A regenerative current coming from the coil flows through a regeneration unit when the coil makes a transition from an energized state where the coil is supplied with an electric current from a power supply to a non-energized state where the coil is supplied with no electric current from the power supply. The control unit causes the regenerative current to flow through a load by controlling a switch when the coil makes the transition from the energized state to the non-energized state.
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公开(公告)号：US11369011B2
公开(公告)日：2022-06-21
申请号：US17058353
申请日：2019-04-03
Inventor： Kazuyuki Sakiyama , Daisuke Hosokawa
Abstract: A high-frequency heating device that includes: a first conductor; a second conductor disposed with the first conductor through a space therebetween; a high-frequency power source that is connected to the first conductor and the second conductor and that applies a high-frequency voltage between the first conductor and the second conductor; and a connection path that electrically connects the first conductor and the second conductor to each other at a first connection position and a second connection position. The first connection position is different from a first power feeding position at which the first conductor and the high-frequency power source are connected to each other on the first conductor, and the second connection position is different from a second power feeding position at which the second conductor and the high-frequency power source are connected to each other on the second conductor.
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公开(公告)号：US09755539B2
公开(公告)日：2017-09-05
申请号：US15156308
申请日：2016-05-16
Inventor： Eiji Takahashi , Kazuyuki Sakiyama
Abstract: A power conversion device includes a first detection circuit that acquires input information about an AC voltage and/or an alternating current which are inputted to the power conversion device from an AC power supply, a rectifier circuit, an inverter circuit including a switch, and a control circuit that generates a pulse signal for the switch while the control circuit (A) determines, based on the input information, whether the rectifier circuit is in a state in which the rectifier circuit allows switching noise to propagate from the switch to the AC power supply and (B) changes a frequency of the pulse signal with time at least in a period in which the rectifier circuit is in the state.
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