摘要
现有的DC/DC变换器存在以下缺点:低功率、低效率和很差的负载适应能力。对此提出了一种新型全桥三电平DC/DC可控源电路,高频变压器的副边有三组绕组,为了提高输出电流,采用两个降压绕组并联整流输出;可控源电路采用不对称移相PWM控制方式,换流电感串接在第三个降压绕组上,空载或轻载时换流电感向滞后桥臂提供换流能量,保证在整个功率范围内实现软开关。通过实验验证提出的DC/DC变换器具有输入电压高、宽范围实现ZVS、高效率的优点。
Existing DC-DC converter has some shortcomings, such as low-power, low-efficiency, andpoor load adaptability. For which a novel soft-switching three-level DC-DC converter is proposed, a step-down winding in secondary side of high-frequency transformer in series with commutation inductance is added to en-sure the devices soft switching in the full power scope using asymmetrical phase- shift PWM control. The operation process and characteristics of the circuit are an-alyzed, and a prototype is completed. Experimental results verify the proposed DC-DC converter with high input voltage, wide ZVS range and high efficiency.
出处
《电气自动化》
2017年第5期3-5,共3页
Electrical Automation
基金
海斗深渊区可控源海洋电磁发射装备关键技术研究专项(XDB06030204)资助
