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公开(公告)号：US20160329817A1
公开(公告)日：2016-11-10
申请号：US15213745
申请日：2016-07-19
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H02M3/33507 , H02M1/08 , H02M3/335 , H02M2001/0025 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
Abstract: A power supply converter includes a power input circuit, which generates and outputs a first alternating current voltage; a transformer, which converts the first alternating current voltage into a second alternating current voltage; a power output circuit, which converts the second alternating current voltage into an output voltage, and outputs the output voltage; a resonant circuit and a correction circuit, which senses the first alternating current voltage to obtain a detection signal, and detects a value of a ringing signal in the detection signal, and sends a control signal to the power input circuit according to the value of the ringing signal, to adjust the frequency of the first alternating current voltage to be equal to the resonance frequency of the resonant circuit or be around the resonance frequency, so as to adjust the value of the ringing signal to reach a minimum value.
Abstract translation: 电源转换器包括产生并输出第一交流电压的电源输入电路; 变压器，其将第一交流电压转换成第二交流电压; 功率输出电路，其将所述第二交流电压转换为输出电压，并输出所述输出电压; 谐振电路和校正电路，其检测第一交流电压以获得检测信号，并检测检测信号中的振铃信号的值，并根据所述检测信号的值向控制信号发送控制信号 振铃信号，将第一交流电压的频率调整为等于谐振电路的谐振频率或谐振频率周围，以便将振铃信号的值调整到最小值。
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公开(公告)号：US10978962B2
公开(公告)日：2021-04-13
申请号：US16502500
申请日：2019-07-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Heping Dai , Liming Ye
Abstract: A method includes detecting a voltage across a bulk capacitor of a power supply system, wherein the power supply system comprises a rectifier, a boost converter and a power converter, and wherein the bulk capacitor is between the boost converter and the power converter, activating the boost converter after the voltage across the bulk capacitor decreases and reaches a first voltage threshold and disabling the boost converter after the voltage across the bulk capacitor increases and reaches a second voltage threshold, wherein the second voltage threshold is greater than the first voltage threshold.
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公开(公告)号：US20210091677A1
公开(公告)日：2021-03-25
申请号：US16932574
申请日：2020-07-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liming Ye , Heping Dai
Abstract: According to one aspect of the present disclosure, an apparatus comprising a two stage DC-DC converter is provided. The converter consists of a multilevel DC-DC converter stage cascaded with a fixed voltage ratio DC-DC converter stage. The converter is controlled so that a first stage of the converter provides an optimized output (a regulated bus voltage) which serves as the input to the second stage. The multi-level DC-DC converter may be the first stage and the fixed voltage ratio, unregulated DC-DC converter may be the second stage converter. Alternatively, the fixed voltage ratio, unregulated DC-DC converter may be the first stage and the multilevel DC-DC converter may be the second stage.
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