The invention discloses a DC-DC converter with a wide buck-boost range for a fuel cell vehicle, and belongs to the technical field of converters. The DC-DC converter aims at solving the problem that an existing DC-DC converter for a fuel cell vehicle cannot meet the wide buck-boost range. A drain electrode of a switching tube Q2 of the DC-DC converter is connected with a positive electrode of a diode D2, a negative electrode of the diode D2 is connected with a negative electrode of a fuel cell through a load RL, a source electrode and a drain electrode of the switching tube Q1 are connected with the negative electrode end of the fuel cell and the positive electrode end of a capacitor C1 respectively, the two ends of an inductor L2 are connected with the drain electrode of the switching tube Q2 and the negative electrode of the fuel cell respectively, a positive electrode end of the capacitor C2 is connected with the negative electrode end of the diode D2, and a negative electrode end of the capacitor C2 is connected with the negative electrode end of the fuel cell. The DC-DC converter has the advantages of wide voltage input range, continuous input current, wide buck-boost range, common ground input and output ends, small number of devices and the like.

    本发明公开了一种用于燃料电池汽车的宽升降压范围的DC‑DC变换器,属于变换器技术领域。本发明针对现有燃料电池汽车用的DC‑DC变换器不能满足宽的升降压范围的问题。本发明的开关管Q2的漏极连接二极管D2的正极,二极管的D2的负极通过负载RL连接燃料电池的负极,所述开关管Q1的源极和漏极分别连接燃料电池的负极端和电容C1的正极端,电感L2的两端分别连接开关管Q2的漏极和燃料电池的负极,电容C2的正极端连接二极管D2的负极端,电容C2的负极端连接燃料电池的负极端;本发明具有宽电压输入范围、连续输入电流、宽升降压范围、输入输出端共地和器件个数少等优点。


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    Title :

    DC-DC converter with wide buck-boost range for fuel cell vehicle


    Additional title:

    一种用于燃料电池汽车的宽升降压范围的DC-DC变换器


    Contributors:
    WU XIAOGANG (author) / WANG JIULONG (author)

    Publication date :

    2021-12-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    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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