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1. 发明公开

EP3979277A1 PLANAR TRANSFORMER, POWER CONVERSION CIRCUIT, AND ADAPTER 审中-公开
公开(公告)号：EP3979277A1
公开(公告)日：2022-04-06
申请号：EP20822966.6
申请日：2020-04-07
申请人： Huawei Technologies Co., Ltd.
发明人： YU, Peng
IPC分类号： H01F27/38 , H02M1/44
摘要： This application provides a planar transformer, a power conversion circuit, and an adapter, to improve noise suppression performance. The planar transformer includes a magnetic core and a printed circuit board PCB winding board, where the PCB winding board includes a primary winding, a secondary winding, a shielding winding, and a compensation winding. In embodiments of this application, the shielding winding and the compensation winding that has a plurality of turns of coils are disposed between the primary winding and the secondary winding of the planar transformer. The shielding winding can shield electric field coupling between the primary winding and the secondary winding, thereby suppressing a noise current between the primary winding and the secondary winding. Common mode noise generated by the compensation winding cancels common mode noise flowing to the secondary winding or the primary winding, to minimize common mode noise of an entire system.

2. 发明公开

EP3696831A1 PLANAR TRANSFORMER, POWER SOURCE SWITCHING CIRCUIT AND ADAPTER 有权
公开(公告)号：EP3696831A1
公开(公告)日：2020-08-19
申请号：EP18875584.7
申请日：2018-11-07
申请人： Huawei Technologies Co., Ltd.
发明人： YU, Peng , CHEN, Wei , REN, Jie
IPC分类号： H01F27/28
摘要： This application provides a planar transformer, a power conversion circuit, and an adapter, to improve noise suppression performance. The planar transformer includes: a primary winding, including a first primary winding layer; a secondary winding, including a first secondary winding layer, where an N s1 th turn of coil to an (N s1 +B 1 -1) th turn of coil in the secondary winding are disposed at the first secondary winding layer; and a charge balance winding, including a first charge balance winding layer, where the first charge balance winding layer is disposed between the first primary winding layer and the first secondary winding layer, and is adjacent to the first primary winding layer and the first secondary winding layer. N 1 turns of coils are disposed at the first charge balance winding layer, where N 1 is greater than or equal to N b1 . When the planar transformer works, an average value of first induced voltages generated by N b1 turns of coils is equal to an average value of second induced voltages generated by the first secondary winding layer, where N 1 and N b1 are positive numbers.

3. 发明公开

EP4213170A1 PLANAR TRANSFORMER, POWER SOURCE CONVERSION CIRCUIT, AND ADAPTER 审中-实审
公开(公告)号：EP4213170A1
公开(公告)日：2023-07-19
申请号：EP21884467.8
申请日：2021-06-29
申请人： Huawei Technologies Co., Ltd.
发明人： YU, Peng , REN, Jie
IPC分类号： H01F27/38 , H02M1/44
摘要： This application provides a planar transformer, a power conversion circuit, and an adapter. A first noise cancellation winding is disposed between a primary winding and a secondary winding of the planar transformer, and a quantity of coil turns of each noise cancellation winding layer in the first noise cancellation winding is designed so that when the planar transformer is operating, an induced voltage of a noise cancellation winding coil in a first noise cancellation winding layer can be used to cancel or compensate for an induced voltage of a first secondary winding layer. In this way, common mode noise generated by the secondary winding or the primary winding is suppressed, and noise suppression performance is improved. In addition, the first noise cancellation winding is formed by means of at least two noise cancellation winding layers being connected in series, and other noise cancellation winding layers in the first noise cancellation winding that are connected in series to a first noise winding layer are used to increase an induced voltage of the first noise winding layer. Therefore, compared with the conventional technology, the first noise winding layer in this application may use a relatively small quantity of coil turns to reach a required induced voltage.

4. 发明公开

EP4024692A1 MAGNETIC DEVICE AND BIDIRECTIONAL DC CONVERTER 有权
公开(公告)号：EP4024692A1
公开(公告)日：2022-07-06
申请号：EP20862559.0
申请日：2020-05-25
申请人： Huawei Technologies Co., Ltd.
发明人： TAN, Wei , YU, Peng
IPC分类号： H02M3/335 , H01F27/24 , H01F27/28
摘要： This application relates to the field of electronic technologies, and discloses a magnetic apparatus and a two-way DC converter circuit, to reduce losses in windings of the magnetic apparatus. The magnetic apparatus includes: a first magnetic member, a second magnetic member, a first winding, and a second winding, where the first magnetic member includes a first magnetic cylinder, a second magnetic cylinder, a third magnetic cylinder, and at least one fourth magnetic cylinder; the first winding is wound around the first magnetic cylinder and the second magnetic cylinder, the second winding is wound around the first magnetic cylinder and the third magnetic cylinder, and a direction in which the first winding is wound around the second magnetic cylinder is opposite to a direction in which the second winding around the third magnetic cylinder; the first magnetic member and the second magnetic member form a magnetic circuit of a transformer through the first magnetic cylinder and the fourth magnetic cylinder; a part of the first winding around the second magnetic cylinder forms a primary side resonant inductor; and a part of the second winding around the third magnetic cylinder forms a secondary side resonant inductor.

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