-
公开(公告)号：US20180269796A1
公开(公告)日：2018-09-20
申请号：US15982605
申请日：2018-05-17
Inventor： Masahiro YAMAOKA , Takehiko YAMAKAWA , Motohiko FUJIMURA
IPC: H02M3/335
CPC classification number: H02M3/33592 , H02M1/00 , H02M3/337 , H02M2001/0009 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
Abstract: An electric power conversion device includes: a transformer including first and second windings magnetically coupled; a bridge circuit including a switch element; a rectifier circuit coupled to an output side of the transformer; a first resonant inductor; a second resonant inductor external to the transformer; and a resonant capacitor, wherein n1≥n2, Cr>C1, and Lr>L2 where Lr is an inductance value of the first resonant inductor and L2 is an inductance value including an inductance value of the second resonant inductor and an inductance value of a parasitic inductance component that is in series with the second winding in the pathway from the second winding to the rectifier circuit.
-
公开(公告)号：US20220166329A1
公开(公告)日：2022-05-26
申请号：US17441184
申请日：2020-02-14
Inventor： Akira KATO , Motohiko FUJIMURA , Kazuyuki SAKIYAMA , Takehiko YAMAKAWA , Taiki NISHIMOTO
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
-
公开(公告)号：US20200067348A1
公开(公告)日：2020-02-27
申请号：US16467760
申请日：2017-12-07
Inventor： Atsushi YAMAMOTO , Motohiko FUJIMURA , Taiki NISHIMOTO , Masahiro YAMAOKA
Abstract: A power receiver apparatus receives a code-modulated wave from a power transmitter apparatus via a transmission path, the code-modulated wave including first power modulated by code modulation using a modulation code based on a code sequence. The power receiver apparatus is provided with a contactless connector and a code demodulator. The contactless connector is coupled to the transmission path without electrical contact with the transmission path, and receives the code-modulated wave from the power transmitter apparatus via the transmission path. The code demodulator demodulates the received code-modulated wave to generate second power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation.
-
4.发明公开公开(公告)号：US20240088588A1
公开(公告)日：2024-03-14
申请号：US18516437
申请日：2023-11-21
Inventor： Motohiko FUJIMURA , Hiroshi OGURA , Kazuhiro NISHIKAWA , Yoshihiro KAWAKITA , Hidetoshi KITAURA
IPC: H01R12/71 , H01R13/631 , H01R43/26 , H05K1/02
CPC classification number: H01R12/718 , H01R13/631 , H01R43/26 , H05K1/0269 , H05K2201/09063 , H05K2201/10318 , H05K2201/10325
Abstract: A power converter includes first and second components on which male and female fitting members of each of a plurality of pairs of fitting members are arranged, with a pair of first alignment keys formed in the first and second components as reference positions. The first and second components are coupled to each other by the female fitting member clamping an insertion portion of the male fitting member inserted between first and second clamping portions of the female fitting member arranged so as to face each other in a state where the pair of first alignment keys are positionally aligned. The first and second clamping portions are each bent so as to form one of protrusions toward one of surfaces thereof facing each other. A gap is formed in a distal end portion of each of the first and second clamping portions.
-
公开(公告)号：US20230037202A1
公开(公告)日：2023-02-02
申请号：US17867974
申请日：2022-07-19
Inventor： Motohiko FUJIMURA , Hiroshi OGURA , Yoshihiro KAWAKITA , Hidetoshi KITAURA
Abstract: A power conversion device includes: circuit boards; at least one engagement member configured to engage a male engagement member with a female engagement member to allow the circuit boards to be electrically connected, the male engagement member being connected to one of the circuit boards and having a substantially flat plate-shaped insertion portion, the female engagement member being connected to another of the circuit boards and having first and second clamping portions disposed to face each other, and the engagement of the engagement members being made by clamping the insertion portion by the clamping portions; a differential amplifier configured to measure a voltage across the engagement member; an arithmetic unit configured to estimate a resistance value of the engagement member based on the measured voltage; and a power conversion circuit controller configured to perform notification on condition that the estimated resistance value exceeds a resistance threshold.
-
Patent Agency Ranking
6.发明申请公开(公告)号：US20200006981A1
公开(公告)日：2020-01-02
申请号：US16490500
申请日：2018-02-26
Inventor： Atsushi YAMAMOTO , Masahiro YAMAOKA , Taiki NISHIMOTO , Motohiko FUJIMURA
Abstract: A control circuit of a code modulator sets first to third states to a code modulation circuit. In first state, first and fourth switch circuits are on, and second and third switch circuits are off. In second state, first and fourth switch circuits are off, and second and third switch circuits are on. In third state, all first to fourth switch circuits are on during transition from the first to second state, and vice versa. A control circuit of a code demodulator sets fourth to sixth states to a code demodulation circuit. In fourth state, fifth and eighth switch circuits are off, and sixth and seventh switch circuits are on. In fifth state, fifth and eighth switch circuits are on, and sixth and seventh switch circuits are off. In sixth state, all fifth to eighth switch circuits are on during transition from fourth to fifth state, and vice versa.
-
公开(公告)号：US20220069501A1
公开(公告)日：2022-03-03
申请号：US17389545
申请日：2021-07-30
Inventor： Motohiko FUJIMURA , Toshihiko BESSHO , Eiji NISHIMURA , Shinya KIMURA , Shigeru NAKABAYASHI , Manabu EGAWA , Hiroshi OGURA
Abstract: A power conversion device includes first and second components and pairs of engagement members each including male and female engagement members. The male engagement member includes an insertion part having a substantially flat plate shape. The female engagement member includes first and second clamping parts arranged to be opposed to each other. In each of the pairs of engagement members, the male and female engagement members are respectively arranged on one and another of the first and second components. The first and second components are coupled when the female engagement member clamps the insertion part inserted between the first and second clamping parts in each of the pairs of engagement members. Each of the first and second clamping parts is bent to form a projecting portion toward an opposed surface. A gap is provided at a distal end of each of the first and second clamping parts.
-
公开(公告)号：US20210242781A1
公开(公告)日：2021-08-05
申请号：US17050661
申请日：2019-04-16
Inventor： Motohiko FUJIMURA , Atsushi YAMAMOTO
Abstract: A power converter apparatus is provided with: a plurality of leg circuits, each including two switch circuits connected in series between input terminals; a transformer including a primary winding and a secondary winding, the primary winding having a first terminal and a second terminal; and at least one capacitor. The at least one capacitor is connected between the first terminal or the second terminal of the primary winding of the transformer, and a node between the two switch circuits in at least one leg circuit among the plurality of leg circuits. The first terminal of the primary winding of the transformer is connected to at least two nodes between the switch circuits in at least two first leg circuits among the plurality of leg circuits, via at least two first circuit portions having at least one of capacitances and inductances different from each other, respectively.
-
公开(公告)号：US20200014215A1
公开(公告)日：2020-01-09
申请号：US16490498
申请日：2018-02-26
Inventor： Motohiko FUJIMURA , Masahiro YAMAOKA , Atsushi YAMAMOTO , Taiki NISHIMOTO
Abstract: A code modulator comprises: a first filter circuit connected between a pair of input ports, a second filter circuit connected between a pair of output ports, and a third filter circuit connected in parallel to each of switch circuits. A code demodulator comprises: a fourth filter circuit connected between a pair of input ports, a fifth filter circuit connected between a pair of output ports, and a sixth filter circuit connected in parallel to each of switch circuits.
-
公开(公告)号：US20210217571A1
公开(公告)日：2021-07-15
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.
-
-
-
-
-
-
-
-
-
Search Results
13
records
(took 0.022 seconds)
