The invention discloses a hybrid T-shaped bridgeless three-level rectifier suitable for the preceding stage of a charging pile. A diode D2, a switching tube S2 and a switching tube S4 are connected to form a hybrid T-shaped structure; the mixed T-shaped structure is connected with a switch tube S3 to form a three-level clamping bridge arm structure; the diode D1, the diode D2, the switch tube S1, the switch tube S2, the switch tube S3 and the inductor L branch are connected to form a bridgeless structure; the alternating current power supply ug is connected with the inductor L for charging and discharging; the capacitor C1 and the capacitor C2 are connected in series to form a direct-current bus, and each capacitor bears half of the voltage Udc of the direct-current bus; the switching tube S4 is connected between the capacitor C1 and the capacitor C2; the switch tube S1 and the switch tube S2 are symmetrically conducted with the switch tube S3 and the switch tube S4 in positive and negative half cycles, so that the circuit is easier to control during working; the circuit is low in working frequency, prolongs the service life of a switching tube, and enables the switching loss to be smaller. Meanwhile, compared with a front-stage two-level AC-DC circuit of the charging pile, the two-level AC-DC circuit has the advantages of low input THD, high efficiency, low voltage stress and high power density.

    本发明公开了一种适用于充电桩前级的混合T形无桥三电平整流器,二极管D2、开关管S2和开关管S4连接构成混合T形结构;混合T形结构与开关管S3连接构成三电平钳位桥臂结构;二极管D1、二极管D2、开关管S1、开关管S2、开关管S3与电感L支路连接构成无桥结构;交流电源ug与电感L连接进行充放电;电容C1和电容C2串联形成直流母线,每个电容承受直流母线电压Udc的一半;开关管S4连接在电容C1和电容C2之间;开关管S1、开关管S2与开关管S3、开关管S4正负半周期对称导通,使得电路工作时更容易控制;电路工作频率低,提高开关管寿命,使得开关损耗更小。同时,相较于充电桩前级两电平AC‑DC电路具有输入THD低、效率高、电压应力低、功率密度高的优势。


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    Title :

    Hybrid T-shaped bridgeless three-level rectifier suitable for preceding stage of charging pile


    Additional title:

    一种适用于充电桩前级的混合T形无桥三电平整流器


    Contributors:
    JING CHENG (author) / YANG LI (author) / HE KAIZHONG (author) / TANG CHUNLIN (author) / HUANG JIAN (author) / GAN JING (author) / FU BO (author) / LIU LILING (author)

    Publication date :

    2024-11-12


    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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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