PFC jitter frequency control method, PFC controller and storage medium

• Main Authors: YU CHUFEI, DENG WEI
• Format: Patent
• Language: Chinese; English
• Published: 06.11.2020
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a PFC jitter frequency control method and system, and a storage medium, and the method comprises the steps: obtaining a duty ratio PWM_DUTY_1 outputted by a current loop PI controller based on a preset PWM center frequency value fc; generating a real-time jitter frequency fx; and simultaneously modulating the PWM duty ratio and the PWM frequency according to the preset PWMcenter frequency value fc, the real-time jitter frequency and the current loop transmission characteristic. Compared with the prior art, the disturbance spectrum is dispersed at the integral multipleof the center frequency of the switch, the peak value is reduced, and the test passing rate is improved. 本发明公开了一种PFC抖动频率控制方法、系统及存储介质，所述方法包括：基于预先设定的PWM中心频率值fc，获取电流环PI控制器输出的占空比PWM_DUTY_1；产生实时抖动频率fx；根据所述预先设定的PWM中心频率值fc和实时抖动频率，以及电流环传递特性同时调制PWM占空比和PWM频率。相对于现有技术，本发明实现了骚扰频谱在开关中心频率整数倍处分散，降低了峰值，提高了测试通过率。