Orthogonal flux magnetic core structure for improving power density of Sigma converter

• Main Authors: ZHANG JINCHENG, HAO YUE, YU LONGYANG, ZHAO SHENGLEI, SUN XUEJING, YOU SHUZHEN, HAN WENBAO, WEI HAOBIN
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2024
• 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; BASIC ELECTRIC ELEMENTS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

The invention discloses an orthogonal magnetic flux magnetic core structure for improving the power density of a Sigma converter. The orthogonal magnetic flux magnetic core structure comprises a plurality of magnetic legs, a plurality of PCBs nested on the magnetic legs, a winding of a Buck inductor, and a first primary winding and a second primary winding of an LLC transformer, the first primary winding and the second primary winding are arranged on the first PCB and the third PCB respectively, and a winding of the Buck inductor is arranged on the second PCB; the leakage inductor of the LLC transformer is used for replacing the resonant inductor of the LLC transformer, and magnetic flux loops generated by the first primary winding and the second primary winding are the same and are orthogonal to a magnetic flux loop generated by the winding of the Buck inductor. According to the invention, three magnetic elements are integrated by using one magnetic core structure, so that the volume occupied by the magnetic