公开(公告)号：US09515504B2

公开(公告)日：2016-12-06

申请号：US14622934

申请日：2015-02-16

Applicant: Macau University of Science and Technology

Inventor： Xiaodong Li ,  Song Hu

IPC: H02J7/00 ,  H02J7/04 ,  H02J7/16 ,  H02M1/42 ,  H02M3/335 ,  H02M3/337

CPC classification number: H02J7/0052 ,  H02J7/022 ,  H02M1/42 ,  H02M1/4258 ,  H02M3/33576 ,  H02M3/337 ,  Y02B40/90 ,  Y02B70/126 ,  Y02B70/1433

Abstract: A battery charger with power factor correction is provided. In particular, the battery charger is configured to work in a discontinuous current mode with a power factor that is almost unity but no bulky electrolytic capacitor is needed in the charger. The charger has a rectification circuit producing a rectified voltage to a first controllable switching circuit, whose output is fed to a series resonant tank series-connecting a first winding of a high-frequency transformer. The second winding thereof is connected to a second controllable switching circuit, whose output is a DC voltage for battery charging. The charger includes a control unit for generating a first control signal and a second control signal to control the first and the second controllable switching circuits, respectively, such that the current flowing in the first winding is substantially phase-aligned with the first control signal's waveform, thereby facilitating power factor correction.

Abstract translation: 提供功率因数校正的电池充电器。 特别地，电池充电器被配置为工作在不连续电流模式，功率因数几乎是一致的，但在充电器中不需要体积大的电解电容器。 充电器具有向第一可控开关电路产生整流电压的整流电路，其输出被馈送到串联连接高频变压器的第一绕组的串联谐振槽。 其第二绕组连接到第二可控开关电路，其输出是用于电池充电的DC电压。 充电器包括用于产生第一控制信号的控制单元和用于分别控制第一和第二可控开关电路的第二控制信号，使得在第一绕组中流动的电流基本上与第一控制信号波形相对齐 ，从而促进功率因数校正。