一种变压器复用型的定频PWM混合式正激谐振变换器
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摘要
本文提出了一种定频调节的变压器复用型的正激谐振变换器。该变换器通过谐振部分与正激电路部分的共同作用,仅改变正激部分的占空比,可以实现对变换器输出电压的调节。该变换器的谐振部分具有开关管零电压开关(ZVS)开通和准零电流开关(ZCS)关断特性,正激部分也具有开关管零电压开关(ZVS)开通且谐振电路与正激电路交替工作即可实现变压器复位,无需额外的复位电路,在定频控制时具有较宽的输入调节范围,降低了电路磁性元件的设计难度。本文详细分析了该变换器的电路拓扑结构和工作原理,并搭建了64～80 V输入,24 V/2.5 A输出的实验样机,实验结果验证了理论分析的正确性。
This paper proposes a fixed frequency controlled resonant converter with a reused transformer. By the joint operation of a resonant circuit and a regular forward circuit, the output voltage can be regulated by only adjusting the duty cycle of the regular forward part. The resonant circuit achieves zero-voltage-switching(ZVS) turn on and Quasi-zero-current-switching(ZCS). In addition, the forward part also achieves ZVS, it work alternately with resonant mode, which results in omitting the additional reset circuit. It has a wide input adjustment range with fixed frequency control, which reduces the design difficulty of the circuit magnetic components. This paper analyzes the topology, working principle of the converter in detail, and finally builds a 64～80 V input, 24 V/2.5 A output experimental prototype. The experimental results verify the correctness of the theoretical analysis.
This paper proposes a fixed frequency controlled resonant converter with a reused transformer. By the joint operation of a resonant circuit and a regular forward circuit, the output voltage can be regulated by only adjusting the duty cycle of the regular forward part. The resonant circuit achieves zero-voltage-switching(ZVS) turn on and Quasi-zero-current-switching(ZCS). In addition, the forward part also achieves ZVS, it work alternately with resonant mode, which results in omitting the additional reset circuit. It has a wide input adjustment range with fixed frequency control, which reduces the design difficulty of the circuit magnetic components. This paper analyzes the topology, working principle of the converter in detail, and finally builds a 64～80 V input, 24 V/2.5 A output experimental prototype. The experimental results verify the correctness of the theoretical analysis.
引文
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[2]曹太强,甘雪,周川,等.对称控制全桥谐振PWM软开关变换器[J].电工技术学报,2016,31(18):92-99.CAO Tai-qiang,GAN Xue,ZHOU Chuan.Research on Symmetrical Controlled Full-Bridge Resonant PWM Converter[J].Transactions of China Electrotechnical Society,2016,31(18):92-99.
[3]吴琨,钱挺,王浩.一种开关频率固定的输出可调型有源钳位正激双向谐振变换器[J].电工技术学报,2018,33(20):4771-4779.WU Kun,QIAN Ting,WANG Hao.A Novel Fixed Switching Frequency Active-Clamp Forward Dual Resonant Converter with Regulation Capability of Output Voltage[J].2018,33(20):4771-4779.
[4]WANG H.A hybrid ZVS resonant converter with reduced circulating current and improved voltage regulation performance[C]//2015 IEEE Transportation Electrification Conference and Expo(ITEC).IEEE,2015.
[5]吴其谌,钱挺.一种谐振电感复用型的定频PWM单向谐振变换器[J].电工技术学报,2018,33(18):129-136.WU Qi-chen,QIAN Ting.A Constant Frequency PWM Controlled Unidirectional Resonant Converter by Reusing Resonant Inductor[J].电工技术学报,2018,33(18):129-136.
[6]LIM S,RANSON J,OTTEN D M,et al.Two-Stage Power Conversion Architecture Suitable for Wide Range Input Voltage[J].IEEE Transactions on Power Electronics,2014,30(2):805-816.
[7]QIN W,ZHU B,ZHANG X,et al.A novel current-feed soft-switching two-switch forward resonant DC-DC Transformer(DCX)[C]//Electronics and Application Conference and Exposition.IEEE,2014.
[8]QIN W,LAN G,WU X.A family of ZVSZCS resonant DCXwith DC resonant capacitor[C]//Future Energy Electronics Conference.IEEE,2015.
[9]QUENTIN N,PERRIN R,MARTIN C,et al.A single switch resonant and quasi-resonant converter suitable for low power applications[C]//Conference of the IEEE Industrial Electronics Society.2016.
[10]QIAN T,WU Q.A Scheme of a Resonant Forward-Flyback Converter With Suppressed Frequency Variation[J].IEEE Transactions on Power Electronics,2018,33(5):3711-3716.
[11]王浩,姚宇,郭凯.一种混合式定频正激谐振变换器[J].新型工业化,2018,8(8):1-6.WANG Hao,YAO Yu,GUO Kai.A Hybrid Forward Resonant Converter with Suppressed Frequency Variation,2018,8(8):1-6
[12]王扬波,吴琨,吴其谌.同步整流技术在谐振变换器中的应用[J].新型工业化,2016,6(7):34-39.WANG Yang-bo,WU Kun,WU Qi-chen.The Implementation of Synchronous Rectifiers in Resonant Converter[J].The Journal of New Industrialization,2016,6(7):34-39.