High-frequency switch power supply parallel current-sharing control method based on average current feedforward

• Main Authors: XU LI, WEN JINXIN, HE YONGPENG, WANG MINGYUE, LU GUIJUN, YAN FEI, QU XIAOWEI
• Format: Patent
• Language: Chinese; English
• Published: 19.01.2018
• 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 relates to a high-frequency switch power supply parallel current-sharing control method based on average current feedforward. The method is characterized in that based on voltage-loop control Gu (s), the average output current feedforward Gav(s) and the voltage loop control output signal iref* are combined to generate a current reference signal iref, and the current reference signaliref is transmitted to current control Gi(s); and based on the average output current feedforward Gav(s), the current-sharing difference value Delta i and a current-sharing virtual impedance are introduced, the manner of the current-sharing virtual impedance G Delta (s) and the minimum value G Delta min (s) are calculated and controlled according to the output electric energy requirement. The average current feedforward is introduced, the influence of the module individual difference on the output current can be reduced, and the influence of the software and hardware parameter difference of the module individuals on t