公开(公告)号：US20150103562A1

公开(公告)日：2015-04-16

申请号：US14054895

申请日：2013-10-16

Applicant: Acbel Polytech Inc.

Inventor： Chia-An Yeh ,  Wei-Liang Lin

IPC: H02M3/335

CPC classification number: H02M3/3353 ,  H02M3/33553 ,  H02M3/33576 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02P80/112

Abstract: A switching power supply with a resonant converter has an AC to DC converter and a DC to DC converter. The AC to DC converter converts an inputted AC power into a DC power. The DC to DC converter has a resonant converter determining a current operating state according to waveforms of a transformer voltage and a driving signal actually measured and further controlling a switching frequency of the resonant converter to approach or to be equal to a resonant frequency for operational efficiency enhancement. Accordingly, the failure to accurately calculate a resonant frequency beforehand can be solved and the issue of accurately keeping the switching frequency consistent with the resonant frequency can be tackled.

Abstract translation: 具有谐振转换器的开关电源具有AC至DC转换器和DC至DC转换器。 AC到DC转换器将输入的AC电力转换为DC电力。 DC-DC转换器具有谐振转换器，根据实际测量的变压器电压和驱动信号的波形确定当前工作状态，并进一步控制谐振转换器的开关频率接近或等于谐振频率以实现运行效率 增强。 因此，可以解决预先准确地计算谐振频率的失败，可以解决精确地保持与谐振频率一致的开关频率的问题。

公开(公告)号：US09985541B2

公开(公告)日：2018-05-29

申请号：US15236759

申请日：2016-08-15

Applicant: ACBEL POLYTECH INC.

Inventor： Cheng-Hsiao Luo ,  Wei-Liang Lin

IPC: H02M3/335 ,  H02M1/42 ,  H02M1/15

CPC classification number: H02M3/33546 ,  H02M1/15 ,  H02M1/4208 ,  H02M3/33507 ,  Y02B70/126

Abstract: A feed forward controlling circuit is used to perform a feed forward controlling method to restrain ripple of the output voltage in a power converter. The power converter is controlled by a control signal outputted from an output terminal of a controller. The method includes steps of: receiving an output voltage from an output terminal of a voltage converter; attenuating the output voltage to generate an electrical signal; acquiring a DC signal from the electrical signal; and obtaining a ripple compensation signal in accordance with the electrical signal and the DC signal to output to an output terminal of a controller. The output terminal of the controller outputs a control signal to control the power converter.

公开(公告)号：US09997994B1

公开(公告)日：2018-06-12

申请号：US15594194

申请日：2017-05-12

Applicant: ACBEL POLYTECH INC.

Inventor： Cheng-Hsiao Luo ,  Chia-An Yeh ,  Wei-Liang Lin

IPC: G05F1/33 ,  G05F5/00 ,  H02M1/42 ,  H02M7/06 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M1/42 ,  G05F1/33 ,  G05F5/00 ,  H02M1/08 ,  H02M1/4233 ,  H02M3/33546 ,  H02M7/06 ,  H02M2001/0009

Abstract: A totem-pole PFC and a current-sampling unit of the totem-pole PFC are provided. The totem-pole PFC is electrically connected to an AC power source and a DC-to-DC converter, and is electrically connected to a load through the DC-to-DC converter. The current-sampling unit has a first sampling switch and a second sampling switch. The first sampling switch and the second sampling switch are controlled to be turned on and turned off so that a magnetizing current flows through the magnetizing inductor when a magnetizing inductor is magnetized and a demagnetizing current does not flow through the sampling resistor when the magnetizing inductor is demagnetized, thereby increasing the demagnetization efficiency and overcoming superimposed operations to improve current detection and increase conversion efficiency of the power conversion.