최근 LDC는 자율주행기술의 도입으로 인해 용량이 증대되고 있어 대용량 N상 방식의 컨버터의 개발이 부상하고 있다. 이와 같은 N상 인터리빙 방식의 차량용 DC-DC컨버터에서, 출력커패시터의 ESR저감을 통한 12V 배터리 수명 향상 및 DC-DC컨버터 효율증대를 하고자 본 발명을 제안한다. 본 발명에 따르면, 고전압(HV) 배터리와 저전압(LV) 배터리 사이에 N개의 DC-DC 컨버터를 병렬 연결하여 구성된 N상 전력회로; 및 상기 각 상의 DC-DC 컨버터의 출력에 공통으로 연결된 하나의 출력커패시터를 포함하며, 상기 N상의 전력회로의 각 상은 360°/N의 위상을 지연시키는 인터리빙 방식으로 제어되는 것을 특징으로 하는 LDC의 출력커패시터 기생저항 최소화 장치 및 방법이 제공된다. 여기서, 상기 N상의 각 전력회로는 [(상기 출력커패시터의 기생저항(ESR, equivalent series resistance)이 최소가 되는 주파수)/N]의 주파수로 스위칭제어된다.

    A low-voltage DC-DC converter (LDC) includes: an N-phase power circuit configured by connection of N DC-DC converters in parallel between a high-voltage (HV) battery and a low-voltage (LV) battery; and one output capacitor commonly connected to an output of each phase DC-DC converter. Each phase of the N-phase power circuit is controlled in an interleaving manner which delays a phase by 360°/N. Here, each N-phase power circuit is controlled by switching at a frequency of [(a frequency at which the parasitic resistance (equivalent series resistance (ESR)) of the output capacitor is minimized)/N]. The parasitic resistance of the output capacitor of the LDC can be minimized. Accordingly, a lifespan of a battery can be improved and efficiency of the DC-DC converter can be increased through the reduction of the equivalent series resistance (ESR) of the output capacitor.


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    Titel :

    LDC Method and apparatus for minimizing capacitor parasitic resistance of LDC


    Weitere Titelangaben:

    LDC의 출력커패시터 기생저항 최소화 방법 및 장치


    Beteiligte:
    PARK JI HOON (Autor:in) / CHOI DEOK KWAN (Autor:in) / KIM WON GON (Autor:in) / KIM KANG MIN (Autor:in) / HEO MIN (Autor:in) / BANG TAE HO (Autor:in) / KIM DU HO (Autor:in) / SHIM HYUN WOO (Autor:in) / JEON SOO MIN (Autor:in) / LEE A RA (Autor:in)

    Erscheinungsdatum :

    2022-06-02


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    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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