The present invention provides a bidirectional resonant transducer magnetic field flattening circuit and a control method thereof. The bidirectional resonant transducer magnetic field flattening circuit comprises a primary conversion circuit, a transformer, a secondary conversion circuit, and a controller, which are sequentially connected. The primary conversion circuit is connected to a primary winding (W1) of a transformer through a first capacitor (C1), and a current transformer (CT) is installed between a secondary winding of the transformer and a secondary conversion circuit. According to the positive component (Ipositive) of a current in the cavity of the secondary conversion circuit and the negative component (Inegative) of the current in the cavity of the secondary conversion circuit, a controller further controls the duty ratios of switches in the secondary conversion circuit. The bidirectional resonant transducer magnetic field flattening circuit can effectively eliminate a magnetic deviation phenomenon on both sides of a bidirectional resonant converter to achieve balance control for the magnetic circuit, thereby avoiding saturation, removing DC blocking capacitors on a secondary loop, and reducing the volume and cost of the equipment, and can have a small amount of additional components in addition to a conventional bidirectional resonant converter, thereby increasing the competitiveness of the product.
본 발명은 양방향 공진 변환기 자기평형 회로 및 그 제어방법을 공개하는 데, 그 중 양방향 공진 변환기 자기평형 회로는 차례대로 연결된 1차측 변환회로, 변압기, 2차측 변환회로 및 제어기를 포함하며, 상기 1차측 변환회로는 제1 커패시터C1를 통해 변압기 1차측 권선(primary winding)W1과 연결되고, 상기 변압기 2차측 권선(secondary winding)과 2차측 변환회로 사이에는 변류기(current transformer)CT가 설치되며, 제어기는 변류기CT가 검측해 낸 2차측 변환회로 캐비티 중 전류의 정방향 분량 Ipositive과 2차측 변환회로 캐비티 중 전류의 역방향 분량Inegative에 근거해, 더 나아가서, 2차측 변환회로 중 스위치의 듀티비(dutyratio)를 제어한다. 본 발명은 양방향 공진 변환기 양측 자기 편향 현상을 효과적으로 제거하고 자기회로의 평형 제어를 구현함으로써, 포화를 피하고 2차측의 직류차단 커패시터를 생략하며, 설비의 부피를 줄이고 원가를 절감하며, 종래 양방향 공진 변환기의 기초상에서 소량의 소자만 증가하여 제품의 경쟁력을 향상시킨다.
Bidirectional resonant transducer magnetic field flattening circuit and its control method
양방향 공진 변환기 자기평형 회로 및 그 제어방법
2022-05-10
Patent
Elektronische Ressource
Koreanisch
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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