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公开(公告)号：US12119740B2
公开(公告)日：2024-10-15
申请号：US17879579
申请日：2022-08-02
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Qiong Ye , Jiebin Cheng , Qinghai Wang , Fulong Guo
CPC classification number: H02M1/123 , H02M1/0064 , H02M1/12 , H02M1/44 , H02M3/01 , H02M3/015 , H02M3/33571 , H02M3/33573 , H02M3/335
Abstract: The converter includes a primary-side winding, a secondary-side winding, a resonant inductor, a resonant capacitor, and a noise suppression network. The primary-side winding and the secondary-side winding form a transformer. The noise suppression network is connected between a primary-side quiescent point and a secondary-side quiescent point. The primary-side quiescent point is a direct current stable potential at an input terminal of the DC/DC converter. The secondary-side quiescent point is a direct current stable potential at an output terminal of the DC/DC converter. A first parasitic capacitance between a first terminal of the primary-side winding and the secondary-side quiescent point is equal to a second parasitic capacitance between a second terminal of the primary-side winding and the secondary-side quiescent point. A suppression current is generated by the noise suppression network, and has a direction opposite to a direction of a total noise current generated by the resonant inductor.
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公开(公告)号：US12046409B2
公开(公告)日：2024-07-23
申请号：US16611092
申请日：2017-05-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Hongbo Zhang , Yongjun Dai , Xiaosong Liu , Qinghai Wang
CPC classification number: H01F27/289 , H01F27/24 , H01F27/361
Abstract: A transformer and a switch-mode power supply are provided. The transformer includes: a magnetic core structure; several windings that surround a same magnetic cylinder in the magnetic core structure in a stacked manner, where the several windings include at least one primary-side winding and at least one secondary-side winding; and an electromagnetic shielding layer that is disposed between at least two adjacent windings, where the two adjacent windings are a primary-side winding and a secondary-side winding, and the electromagnetic shielding layer is made of a magnetic material. The electromagnetic shielding layer of the transformer can suppress a noise current of the winding, to reduce noise.
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公开(公告)号：US20160211737A1
公开(公告)日：2016-07-21
申请号：US15083853
申请日：2016-03-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Dan Yang , Qinghai Wang , Yongfa Zhu
Abstract: An active filter, which may effectively suppress the low-frequency noise, includes a main circuit and a control circuit. The control circuit is configured to detect a first current output by a negative electrode of an input end of a conversion circuit to acquire an alternating current component (harmonic component) in the first current, and generate a control signal according to the harmonic component. The main circuit is configured to generate, under the control of the control signal, a second current having a phase opposite to a phase of the harmonic component, so that a source current formed after the first current and the second current pass through a power source is a direct current.
Abstract translation: 可以有效地抑制低频噪声的有源滤波器包括主电路和控制电路。 控制电路被配置为检测由转换电路的输入端的负电极输出的第一电流，以获得第一电流中的交流分量（谐波分量），并根据谐波分量产生控制信号。 主电路被配置为在控制信号的控制下产生具有与谐波分量的相位相反的相位的第二电流，使得在第一电流和第二电流之后形成的源极电流通过电源 是直流电。
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公开(公告)号：US20200168389A1
公开(公告)日：2020-05-28
申请号：US16611092
申请日：2017-05-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Hongbo Zhang , Yongjun Dai , Xiaosong Liu , Qinghai Wang
Abstract: A transformer and a switch-mode power supply are provided. The transformer includes: a magnetic core structure; several windings that surround a same magnetic cylinder in the magnetic core structure in a stacked manner, where the several windings include at least one primary-side winding and at least one secondary-side winding; and an electromagnetic shielding layer that is disposed between at least two adjacent windings, where the two adjacent windings are a primary-side winding and a secondary-side winding, and the electromagnetic shielding layer is made of a magnetic material. The electromagnetic shielding layer of the transformer can suppress a noise current of the winding, to reduce noise.
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