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公开(公告)号：US09866135B2
公开(公告)日：2018-01-09
申请号：US15465033
申请日：2017-03-21
Inventor： Fumito Kusama , Takaaki Norisada , Go Yamada , Keiji Akamatsu
CPC classification number: H02M3/33592 , H02M1/08 , H02M7/4807 , H02M7/797 , H02M2001/0009 , H02M2001/0048 , H02M2001/0054 , H02M2001/346 , H02M2001/348 , H02M2007/4815 , Y02B70/1441 , Y02B70/1491
Abstract: A power conversion device includes first and second terminals connected to a DC power source, third and fourth terminals connected to a commercial power system or a load, a transformer including a primary winding having seventh and eighth terminals and a secondary winding having fifth and sixth terminals, an inverter circuit connected between the first and second terminals and the seventh and eighth terminals, a converter circuit connected between the fifth and sixth terminals and the third and fourth terminals, a diode bridge including first and second AC input terminals connected to the fifth and sixth terminals, respectively, and first and second DC output terminals, a first capacitor connected between the first and second DC output terminals, and a first resistor connected in parallel with the first capacitor between the first and second DC output terminals.
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公开(公告)号：US10924024B2
公开(公告)日：2021-02-16
申请号：US16329554
申请日：2017-08-28
Inventor： Takaaki Norisada , Keiji Akamatsu , Fumito Kusama , Go Yamada , Yutaka Kamon , Makoto Ozone
Abstract: A control unit controls an inverter circuit such that a positive voltage and a negative voltage are alternately applied to a primary winding. The control unit controls a cycloconverter so as to allow no power to be transmitted between the cycloconverter and the inverter circuit in a first period including an inversion period during which a voltage of the primary winding has its polarity inverted. The control unit also controls the cycloconverter so as to allow power to be transmitted either in a first direction from the cycloconverter toward the inverter circuit, or in a second direction opposite from the first direction, in a second period different from the first period.
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3.发明授权公开(公告)号：US09866129B2
公开(公告)日：2018-01-09
申请号：US15458129
申请日：2017-03-14
Inventor： Takaaki Norisada , Fumito Kusama , Go Yamada , Keiji Akamatsu
CPC classification number: H02M3/33546 , H02M1/08 , H02M7/4807 , H02M2001/0048 , Y02B70/1491
Abstract: A power converter includes first to fourth terminals, a transformer including primary and secondary windings, an inverter connected between the first and second terminals and the primary winding, a converter connected between fifth and sixth terminals, and a controller. The converter includes first to eighth switch circuits each including a diode and a switch connected in parallel. When a voltage between the fifth and sixth terminals has first polarity, the controller controls the first switch circuit to be in on-state during a first on-period and controls the fifth switch circuit to be in on-state during a second on-period completely including the first on-period. When the voltage between the fifth and sixth terminals has second polarity, the controller controls the second switch circuit to be in on-state during a third on-period and controls the sixth switch circuit to be in on-state during a fourth on-period completely including the third on-period.
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