The invention discloses a high-power direct-current converter which comprises N LLC half-bridge resonant conversion circuits, and each LLC half-bridge resonant conversion circuit comprises a transformer, a half-bridge LLC resonant circuit and two output rectifying circuits. The transformer comprises a primary winding and two secondary windings, and the half-bridge LLC resonant circuit comprises a half-bridge and a resonant branch; the upper bridge arm of the half bridge is connected with the anode of the DC input end, and the lower bridge arm is connected with the cathode of the DC input end; the first end of the resonant branch is connected with the midpoint of the half bridge, the second ends of the resonant branches of the N LLC half-bridge resonant conversion circuits are connected together, and the drives of the half-bridge switching tubes of the N LLC half-bridge resonant conversion circuits are respectively staggered by 360 degrees/N in sequence; the input end of the output rectifying circuit is connected with the corresponding secondary winding; the output ends of the two output rectification circuits of the LLC half-bridge resonant conversion circuit are respectively connected with corresponding output branches, and the two output branches are connected in series or in parallel. According to the invention, primary side automatic current sharing and secondary side automatic voltage sharing can be realized.
本发明公开了一种大功率的直流变换器,包括N条LLC半桥谐振转换电路,LLC半桥谐振转换电路包括变压器、半桥LLC谐振电路和两个输出整流电路;变压器包括原边绕组和两个副边绕组,半桥LLC谐振电路包括半桥和谐振支路;半桥的上桥臂接直流输入端的正极,半桥的下桥臂接直流输入端的负极;谐振支路的第一端接半桥的中点,N条LLC半桥谐振转换电路谐振支路的第二端连接在一起,N条LLC半桥谐振转换电路半桥开关管的驱动依次分别错相360°/N;输出整流电路的输入端接对应的副边绕组;LLC半桥谐振转换电路两个输出整流电路的输出端分别接对应的输出支路,两条输出支路串接或并接。本发明可以实现原边自动均流,副边自动均压。
High-power direct-current converter
一种大功率的直流变换器
24.01.2023
Patent
Elektronische Ressource
Chinesisch
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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