DC magnetic biasing suppression method for bidirectional full-bridge DC/DC converter

• Main Authors: ZHU LIWEI, LI HONG, JI ZHENDONG, SUN HAIXIA, FENG BO, YU ZHENGGANG, FU XIANGYUN, DU YUNHU, YUE FUCHANG, LIN HUA, WANG CHEN, CHENG LIANG, WANG JIANHUA, WU XIAODAN, WEI XING, HU ZEWEI
• Format: Patent
• Language: Chinese; English
• Published: 26.02.2019
• 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 DC magnetic biasing suppression method for a bidirectional full-bridge DC/DC converter, and belongs to the field of bidirectional full-bridge DC/DC converter circuit control.The suppression method comprises: calculating a required phase shift angle after power change, in a first cycle after the required power change, quantitatively changing the phase shift angle and dutycycle of a secondary side, and working at a steady phase shift angle in a second cycle after the required power change. The suppression method of the invention can quickly restore the current flowingthrough a transformer to the steady current after the power change by controlling the voltage at a secondary side AC side in one cycle, to eliminate the DC bias of the restoring process, thereby suppressing the magnetic biasing, and is of great significance for the bidirectional full-bridge DC/DC converter circuit in applications where power is changed. 本发明公开了种用于双向全桥DC/DC变换器的直流偏磁抑制方法，属于双向全桥DC/DC变换器电路控制领域，抑制方法包括：计算功率变化后的所需移