通信电源技术
通信電源技術
통신전원기술
TELECOM POWER TECHNOLOGIES
2009年
4期
36-38
,共3页
全桥变换器%软开关%数字控制系统
全橋變換器%軟開關%數字控製繫統
전교변환기%연개관%수자공제계통
full-bridge convener%soft-switching%digital control system
针对传统ZVZCS-PWM DC/DC全桥变换器在实现滞后桥臂开关管零电流开关过程中,存在着辅助谐振电路附加损耗较大,软开关实现方式复杂,功率开关管电压应力和电流应力高等缺点,介绍了一种新型次级箝位移相控制的ZVZCS PWM DC/DC全桥变换器.文中分析了该变换器实现软开关的原理,同时设计了变换器数字控制系统,控制器采用LPC2214型ARM芯片,并通过一台实验样机验证了这种软开关变换器相关理论的正确性以及该数字控制系统的可行性.
針對傳統ZVZCS-PWM DC/DC全橋變換器在實現滯後橋臂開關管零電流開關過程中,存在著輔助諧振電路附加損耗較大,軟開關實現方式複雜,功率開關管電壓應力和電流應力高等缺點,介紹瞭一種新型次級箝位移相控製的ZVZCS PWM DC/DC全橋變換器.文中分析瞭該變換器實現軟開關的原理,同時設計瞭變換器數字控製繫統,控製器採用LPC2214型ARM芯片,併通過一檯實驗樣機驗證瞭這種軟開關變換器相關理論的正確性以及該數字控製繫統的可行性.
침대전통ZVZCS-PWM DC/DC전교변환기재실현체후교비개관관령전류개관과정중,존재착보조해진전로부가손모교대,연개관실현방식복잡,공솔개관관전압응력화전류응력고등결점,개소료일충신형차급겸위이상공제적ZVZCS PWM DC/DC전교변환기.문중분석료해변환기실현연개관적원리,동시설계료변환기수자공제계통,공제기채용LPC2214형ARM심편,병통과일태실험양궤험증료저충연개관변환기상관이론적정학성이급해수자공제계통적가행성.
Convertional full-bridge Zero-Voltage and Zero-Current switching(ZVZCS)PWM DC-DC converters exist some disadvantages in the operating process of ZCS for lagging leg. These problems include additional losses in auxiliary cir-cuit, complicated realization for soft-switching, and high voltage and curent stresses of switches. A full-bridge ZVZCS PWM DC-DC converter with coupled output inductor was proposed to resolve these issues. The soft-switching operating principle of the converter was analyzed, and digital control system was designed using ARM chip LCP2214. A prototype has verified the principle and characteristics of the proposed soft-switching convener and the feasibility of the digital control system.
