公开(公告)号：US20160056730A1

公开(公告)日：2016-02-25

申请号：US14705982

申请日：2015-05-07

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chao YAN ,  Li-Ping SUN ,  Zhi-Hui DING ,  De-Sheng GUO

IPC: H02M7/217

CPC classification number: H02M1/4225 ,  Y02B70/126

Abstract: A control method for a power converter is provided. The power converter includes an inductor, and a switch selectively turned on according to a control signal. The control method includes determining an on-time and a falling time according to a voltage information or a current information of the power converter; determining a switching period of the control signal according to the on-time, the falling time, and a resonant period corresponding to the inductor and a parasitic capacitance of the switch; adjusting the switching period by comparing the switching period with a first threshold period and a second threshold period; generating the control signal having the switching period when the switching period is greater than the first threshold period and less than the second threshold period or when the switching period is greater than the second threshold period and the power converter operates at over 50% of a rated power.

Abstract translation: 提供了一种用于功率转换器的控制方法。 功率转换器包括电感器和根据控制信号选择性地导通的开关。 所述控制方法包括根据所述电力变换器的电压信息或电流信息确定导通时间和下降时间; 根据接通时间，下降时间和对应于电感器的谐振周期和开关的寄生电容确定控制信号的开关周期; 通过将切换周期与第一阈值周期和第二阈值周期进行比较来调整切换周期; 产生具有开关周期的控制信号，当开关周期大于第一阈值周期且小于第二阈值周期时，或者当开关周期大于第二阈值周期时，功率转换器工作在额定值的50％以上 功率。