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1.发明申请公开(公告)号：US20220200463A1
公开(公告)日：2022-06-23
申请号：US17442903
申请日：2020-02-12
Inventor： Naoki SAWADA , Taiki NISHIMOTO , Noriaki TAKEDA
Abstract: A switching power supply apparatus has a line-to-ground capacitance C31 between a first winding terminal of a transformer and a conductor portion, and a line-to-ground capacitance C32 between a second winding terminal of the transformer and the conductor portion. The switching power supply apparatus is provided with a capacitor being connected between a first output terminal of a switching circuit and the first winding terminal of the transformer, and a capacitor being connected between a second output terminal of the switching circuit and the second winding terminal of the transformer. Capacitances of the capacitors C21, C22 are set to satisfy: C21>C22, for C31>C32; C21=C22, for C31=C32; and C21
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2.发明申请公开(公告)号：US20220166330A1
公开(公告)日：2022-05-26
申请号：US17441450
申请日：2020-02-12
Inventor： Noriaki TAKEDA , Taiki NISHIMOTO , Naoki SAWADA
Abstract: A switching power supply apparatus is provided with a switching circuit and an even number of transformers. The transformer are provided with: cores each having an identical shape; primary windings each having an identical arrangement around the cores, and each having first and second terminals; and secondary windings each having an identical arrangement around the cores, and each having third and fourth terminals. The primary windings of the transformers are connected so that when a current flows from the first terminal to the second terminal of a first transformer, a current flows from the second terminal to the first terminal of a second transformer. The secondary windings of the transformers are connected so that when a current flows from the third terminal to the fourth terminal of the first transformer, a current flows from the fourth terminal to the third terminal of the second transformer.
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3.发明申请公开(公告)号：US20220278622A1
公开(公告)日：2022-09-01
申请号：US17631838
申请日：2020-07-29
Inventor： Taiki NISHIMOTO , Noriaki TAKEDA , Naoki SAWADA
Abstract: A power conversion apparatus is provided with a transformer, a primary circuit, and a secondary circuit. The primary circuit is connected to a primary winding of the transformer, has a primary positive bus and a primary negative bus, and includes at least one switching element. The secondary circuit is connected to a secondary winding of the transformer, has a secondary positive bus and a secondary negative bus, and includes at least one switching element. The power conversion apparatus is further provided with a coupling circuit including at least a first capacitor. The power conversion apparatus is configured such that the primary circuit is an unbalanced circuit and the secondary circuit is a balanced circuit, and having the coupling circuit connected between a center tap of the secondary winding of the transformer, and one of the primary positive bus and the primary negative bus.
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公开(公告)号：US20220270816A1
公开(公告)日：2022-08-25
申请号：US17442955
申请日：2020-02-12
Inventor： Noriaki TAKEDA , Taiki NISHIMOTO , Naoki SAWADA
Abstract: A core (X1) has a shape of a rectangular loop having sides (A1 to A4). The sides (A1, A3) are opposed to each other. The sides (A2, A4) are opposed to each other. A winding (w11) is wound around the core (X1) on the side (A2). A winding (w12) is wound around the core (X1) on the side (A4). A winding (w21) is wound around the core (X1) on the side (A2). A winding (w22) is wound around the core (X1) on the side (A4). The windings (w11, w12) are wound around the core (X1) at equal distances from the side (A1). The windings (w21, w22) are wound around the core (X1) at equal distances from the side (A1). The windings (w11, w12) are connected in series or in parallel to each other. The windings (w21, w22) are connected in series or in parallel to each other.
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