公开(公告)号：US10355687B2

公开(公告)日：2019-07-16

申请号：US15354488

申请日：2016-11-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhen Cao ,  Yunfeng Liu ,  Yanzhong Zhang

IPC: G01R19/00 ,  H03K5/19 ,  H03K17/567 ,  H03B28/00 ,  H03K4/08 ,  H03K7/08 ,  G01R31/02 ,  H03K17/0812 ,  H03K17/12 ,  H03K17/16 ,  H03K17/18 ,  G01R31/44

Abstract: A wave loss detection circuit includes: an anode of the diode receives a first drive signal, and a cathode of the diode is connected to a first end of the first resistor; a second end of the first resistor is connected to a first end of the first energy storage unit, a first end of the second resistor, and a first input end of the comparison unit; a second end of the first energy storage unit and a second end of the second resistor are connected to a ground level, and a resistance of the first resistor is less than a resistance of the second resistor; a second input end of the comparison unit is configured to receive a threshold voltage, and if a voltage signal received by the first input end is less than the threshold voltage, which indicates that a wave loss occurs in the first drive signal.

公开(公告)号：US10103640B2

公开(公告)日：2018-10-16

申请号：US14624238

申请日：2015-02-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yazhu Zhao ,  Yunfeng Liu ,  Kai Xin

IPC: H02M7/00 ,  H02G5/06 ,  H02M7/537 ,  H05K7/14

Abstract: A power converter, including: at least two inverting modules, where direct current sides of the at least two inverting modules are connected in parallel using a laminated busbar or a circuit board, and the at least two inverting modules run in an interleaved and parallel manner. In the present invention, the power converter is formed by connecting at least two inverting modules in parallel, and the direct current sides of the at least two inverting modules are connected in parallel using the laminated busbar or the circuit board, so that parasitic inductance between inverting modules is small, forming a low parasitic inductance loop. When the at least two inverting modules run in an interleaved and parallel manner, the low parasitic inductance loop counteracts most ripple currents in a circuit, thereby reducing the burden of the ripple currents on a bus capacitor. Therefore, the demand of the power converter provided in the present invention for the bus capacitor is small.