| 引用本文: | 苏东奇,周雒维,罗全明,邾玢鑫.基于CDM升压单元的高增益Boost变换器[J].电力自动化设备,2014,34(7): |
| SU Dongqi,ZHOU Luowei,LUO Quanming,ZHU Binxin.Big voltage-gain Boost converter based on capacitor-diode multiplier[J].Electric Power Automation Equipment,2014,34(7): |
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| 摘要: |
| 提出了一种具有n（n≥2）倍传统Boost变换器电压增益的高升压Boost变换器，该变换器由2个基本的Boost单元和n-1个由电容、二极管组成的CDM升压单元构成，2个有源开关采用交错控制。该变换器可实现n倍增益变换，避免了在高升压应用场合出现极大占空比；由于采用交错控制，输入电流纹波频率是开关频率的2倍，纹波峰峰值得到降低，因此可减小输入滤波器的体积；有源开关及二极管的电流应力低，因此可选择低耐压的器件以进一步提高变换效率；2个Boost单元能实现自动均流，不需任何有源均流控制。首先对变换器的拓扑推演过程进行了详细阐述，然后以4倍增益高升压Boost变换器为例分析了该类变换器的工作原理及性能特点，最后搭建了一台额定输出功率为300 W的实验样机，实验结果验证了理论分析的正确性。 |
| 关键词: Boost 变换器 交错控制 CDM单元 拓扑 |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目 （2011-AA05A110） |
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| Big voltage-gain Boost converter based on capacitor-diode multiplier |
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SU Dongqi, ZHOU Luowei, LUO Quanming, ZHU Binxin
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State Key Laboratory of Power Transmission Equipment & System Security and New Technology，Chongqing University，Chongqing 400044，China
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| Abstract: |
| A kind of Boost converter with n（n≥2） times the voltage-gain of traditional one is proposed，which is composed of two basic Boost cells and n-1 CDMs（Capacitor-Diode Multipliers）. It realizes big voltage gain while avoids large duty ratio. Since its two active switches are driven by interleaved signals，the ripple frequency of its input current is two times the switching frequency and the ripple peak is lower，resulting in the reduced volume of its input filter. Since the active switches and diodes operate with low current stresses，low voltage components are applied to further enhance the conversion efficiency. Since the current distributes automatically and evenly between two Boost cells，no active current sharing control is necessary. The derivation of converter topology is described in detail. The operating principle and performances of a quadrupler Boost converter are analyzed and the experimental results of a 300 W prototype verify the correctness of theoretical analysis. |
| Key words: Boost electric converters interleaved control capacitor-diode multiplier topology |
