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公开(公告)号：US09893648B2
公开(公告)日：2018-02-13
申请号：US15504808
申请日：2015-10-28
Inventor： Mariko Kifuji , Kazunori Kidera , Mitsuru Tanabe , Kazuo Itoh
IPC: H02M7/539
Abstract: A controller switches between modes each having a different connection state of a DC power supply and the capacitor with respect to first and second output points by controlling switches. A generation unit generates a reference wave including at least one carrier wave. The modes are classified into a sustaining mode in which no current is caused to flow to the capacitor, a charging mode in which a current is caused to flow to the capacitor, and a discharging mode in which a current in a direction opposite to that in the charging mode is caused to flow to the capacitor. The controller switches between the sustaining mode and a charging or discharging mode according to the comparison result between a signal wave and the reference wave.
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公开(公告)号：US09866147B2
公开(公告)日：2018-01-09
申请号：US15306332
申请日：2015-05-27
Inventor： Kazunori Kidera , Mitsuru Tanabe , Mariko Kifuji
Abstract: A first bidirectional switch is electrically connected between a first connection point which is a connection point of a first switching element and a second switching element and a second connection point which is a connection point of a seventh switching element and an eighth switching element. A second bidirectional switch is electrically connected between a third connection point which is a connection point of a third switching element and a fourth switching element and a fourth connection point which is a connection point of a fifth switching element and a sixth switching element. A power-converting device is configured to generate an output voltage between a first output point and a second output point.
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公开(公告)号：US09831778B2
公开(公告)日：2017-11-28
申请号：US15309929
申请日：2015-04-23
Inventor： Kazunori Kidera , Mariko Kifuji
IPC: H02M3/158 , H02M7/5387 , H02M7/487
CPC classification number: H02M3/158 , H02M7/483 , H02M7/487 , H02M7/5387 , H02M2001/007
Abstract: A first conversion circuit switches a magnitude of a voltage generated between a first output point and a reference potential point in three stages. The second conversion circuit switches a magnitude of a voltage generated between the reference potential point and a second output point in three stages. The third conversion circuit includes first to fourth switches in a full bridge configuration and converts a voltage generated between the first output point and the second output point into an alternate current voltage and outputs the alternate current voltage. The third conversion circuit forms a current path including inductors between the first output point and the second output point during a start time period from a start of supplying power from a direct current power supply until a first capacitor and a second capacitor are charged to a specified voltage.
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公开(公告)号：US09806618B2
公开(公告)日：2017-10-31
申请号：US15309914
申请日：2015-04-17
Inventor： Kazunori Kidera , Mariko Kifuji
IPC: H02M7/49 , H02M7/5387 , H02M3/158
CPC classification number: H02M3/158 , H02M3/156 , H02M7/483 , H02M7/5387 , H02M2001/007 , H02M2001/0074
Abstract: A first conversion circuit is electrically connected between a reference potential point and a first input point on a high potential side of a direct current power supply. A second conversion circuit is electrically connected between the reference potential point and a second input point on a low potential side of the direct current power supply. A voltage-regulating circuit is configured to adjust a magnitude of an applied voltage to the first conversion circuit and the second conversion circuit. The voltage-regulating circuit is configured to increase the magnitude of the applied voltage over time during a start time period from a start of supplying power from the direct current power supply until a first capacitor and a second capacitor are charged to a specified voltage.
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