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1. 发明授权

US08335095B2 One cycle control method for power factor correction 有权
标题翻译：一种用于功率因数校正的循环控制方法
公开(公告)号：US08335095B2
公开(公告)日：2012-12-18
申请号：US13128610
申请日：2009-09-14
申请人： Xuetao Mi , Qingfeng Guo , Min Xu
发明人： Xuetao Mi , Qingfeng Guo , Min Xu
IPC分类号： H02M5/42 , G05F1/70
CPC分类号： H02M1/4225 , Y02B70/126
摘要： A one cycle control method for power factor correction based on a boost circuit and a main control chip of system comprises the steps of: (1) Determining whether soft-start ends or not; if the soft-start ends, processing step (2) directly, if not, increasing reference value Uref of output voltage and then processing step (2); (2) Reading sampling output voltage Uo, and sampling inductive current ig according to A/D sampling triggering instant; (3) Calculating duty ratio of PWM signal for driving the switch transistor; (4) Outputting PWM signal; (5) Calculating the next A/D sampling triggering instant according to the duty ratio of PWM signal; (6) Returning to step (2). The present invention can implement the function of power factor correction by integrating the software of the method into the main control chip of the existing system and cooperating with the simple boost circuit, without using the traditional circuit for power factor correction and the specific one cycle control chip for PFC, which reduces the cost of the system. Also the present invention ensures the sampling data true and correct, and the stable operation of system, by simple processing of the sampling triggering instant.
摘要翻译：一种基于升压电路和系统主控芯片的功率因数校正的单周期控制方法，包括以下步骤：（1）确定软启动是否结束; 如果软启动结束，则直接处理步骤（2），如果不是，增加输出电压的参考值Uref，然后处理步骤（2）; （2）读取采样输出电压Uo，并根据A / D采样触发瞬间采样感应电流ig; （3）计算用于驱动开关晶体管的PWM信号的占空比; （4）输出PWM信号; （5）根据PWM信号的占空比计算下一个A / D采样触发时刻; （6）返回到步骤（2）。本发明可以通过将该方法的软件集成到现有系统的主控芯片中并与简单的升压电路相配合来实现功率因数校正的功能，而不使用传统的功率因数校正电路和特定的一个周期控制 PFC的芯片，降低了系统的成本。本发明通过采样触发瞬间的简单处理，确保了采样数据的真实，正确，系统的稳定运行。

2. 发明申请

US20110216565A1 ONE-CYCLE CONTROLLED POWER FACTOR CORRECTION METHOD 有权
标题翻译：单循环控制功率因数校正方法
公开(公告)号：US20110216565A1
公开(公告)日：2011-09-08
申请号：US13128610
申请日：2009-09-14
申请人： Xuetao Mi , Qingfeng Guo , Min Xu
发明人： Xuetao Mi , Qingfeng Guo , Min Xu
IPC分类号： H02M7/06
CPC分类号： H02M1/4225 , Y02B70/126
摘要： A one cycle control method for power factor correction based on a boost circuit and a main control chip of system comprises the steps of: (1) Determining whether soft-start ends or not; if the soft-start ends, processing step (2) directly, if not, increasing reference value Uref of output voltage and then processing step (2); (2) Reading sampling output voltage Uo, and sampling inductive current ig according to A/D sampling triggering instant; (3) Calculating duty ratio of PWM signal for driving the switch transistor; (4) Outputting PWM signal; (5) Calculating the next A/D sampling triggering instant according to the duty ratio of PWM signal; (6) Returning to step (2). The present invention can implement the function of power factor correction by integrating the software of the method into the main control chip of the existing system and cooperating with the simple boost circuit, without using the traditional circuit for power factor correction and the specific one cycle control chip for PFC, which reduces the cost of the system. Also the present invention ensures the sampling data true and correct, and the stable operation of system, by simple processing of the sampling triggering instant.
摘要翻译：一种基于升压电路和系统主控芯片的功率因数校正的单周期控制方法，包括以下步骤：（1）确定软启动是否结束; 如果软启动结束，则直接处理步骤（2），如果不是，增加输出电压的参考值Uref，然后处理步骤（2）; （2）读取采样输出电压Uo，并根据A / D采样触发瞬间采样感应电流ig; （3）计算用于驱动开关晶体管的PWM信号的占空比; （4）输出PWM信号; （5）根据PWM信号的占空比计算下一个A / D采样触发时刻; （6）返回到步骤（2）。本发明可以通过将该方法的软件集成到现有系统的主控芯片中并与简单的升压电路相配合来实现功率因数校正的功能，而不使用传统的功率因数校正电路和特定的一个周期控制 PFC的芯片，降低了系统的成本。本发明通过采样触发瞬间的简单处理，确保了采样数据的真实，正确，系统的稳定运行。

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