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| 摘要: |
| 为提高DC/DC变换器系统的效率,运用功率因数校正(PFC)控制技术,在整个变换器系统中引入了电流和电压2种组态的负反馈,采取了降低损耗的措施,设计出一款用于电源和功率设备的12V/24V双闭环DC/DC变换系统,并进行了该系统稳定性、效率特性仿真实验和硬件电路实验。实验结果表明,所设计的DC/DC变换系统是稳定的,它的效率在稳定工作范围内达到85.0%～88.7%,其最高效率比目前国内外同类变换器高出约3%,其中12V、24V变换系统的输出纹波电压分别约为23mV和30mV,因而尤其适用于低功耗开关电源和中等功率设备。 |
| 关键词: DC/DC变换器,功率因数校正,开关电源,电功率系统,效率 |
| DOI： |
| 分类号:TM46 |
| 基金项目: |
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| High-efficient DC/DC converter with dual close-loop based on PFC technology |
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CHENG Li LI Huale WANG Zhenyu YIN Xing LIU Xingqiao LIU Hexiang
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| Abstract: |
| In order to improve the efficiency of DC/DC converter,a 12 V/24 V DC/DC con- verter system with dual close-loop is designed based on technology of PFC(Power Factor Correction), which introduces both current and voltage feedbacks and adopts measures to reduce power consumption.The system stability and efficiency curves are simulated and the HW circuit is tested.Results show that the designed system is stable and its efficiency within stable working range reaches 85.0%~88.7%,about 3 % higher than that of DC/DC converters alike.The output voltage ripple of 12 V converter system is about 23 mV,and that of 24 V is about 30 mV.The designed converter is especially suitable for low-consumption switching power supply and middle power installations. |
| Key words: DC/DC converter,power factor correction,switching power supply,electric power system,efficiency |
