LCC谐振变换器的电路建模与参数设计

欧伟丽; 张政权; 刘庆想; 张耀文; 席静怡; 蒋丹

doi:10.11884/HPLPB201931.180281

LCC谐振变换器的电路建模与参数设计

doi: 10.11884/HPLPB201931.180281

西南交通大学物理科学与技术学院, 成都 610031

详细信息

作者简介:
欧伟丽(1995-)，女，硕士，从事开关电源及控制技术研究；951640256@qq.com

通讯作者:
张政权(1983-)，男，博士，副研究员，从事脉冲功率技术和能量变换与控制技术研究；zhangzhengquan@163.com

中图分类号: TN82
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出版历程
- 收稿日期: 2018-10-22
- 修回日期: 2018-12-11
- 刊出日期: 2019-04-15

Circuit modeling and parameter design of LCC resonant converter

School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China

摘要

摘要: 对用于高压场合的LCC谐振变换器进行了分析和研究，采用基波近似法推导等效模型，建立了谐振电路的大信号模型和等效模型，对LCC谐振变换器的稳态特性进行分析，采用了一种以输入阻抗角为限定条件的参数设计方法，该方法可以实现谐振变换器零电压开关的同时兼顾谐振电流对效率的影响。在大信号模型的基础上，建立了小信号模型，得到输出电压与输入占空比之间的传递函数，从而建立闭环系统，实现电压的宽范围输出。通过Simulink仿真验证了所设计的LCC谐振变换器可实现全负载范围的零电压开关(ZVS)，说明了设计方法的可行性。
- LCC谐振 /
- 稳态分析 /
- 小信号模型 /
- 闭环 /
- 零电压开关
Abstract: In this paper, the LCC resonant converter for high voltage applications is analyzed and studied. The equivalent model is derived by the fundamental approximation method. The large signal model of the resonant circuit is established. Based on the equivalent model and the large signal model, the LCC resonance is performed. A parameter design method is proposed after analyzing the steady-state characteristics of the converter. The method can realize zero voltage switching of the resonant converter while taking into account the influence of the resonant current on the efficiency. Based on the large-signal model, a small-signal model is established to obtain a transfer function between the output voltage and the input duty cycle, thereby establishing a closed-loop system and achieving a wide-range output voltage. The Simulink simulation verifies that the designed LCC resonant converter can realize ZVS switch with full load range, which verifies the feasibility of the design method.
- LCC resonance /
- steady state analysis /
- small signal model /
- closed loop /
- zero voltage switch

HTML全文

图 1 LCC谐振变换器拓扑结构

Figure 1. Topology of LCC resonant convertor

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图 2 谐振拓扑的主要波形^[7]

Figure 2. Main waveforms based on the LCC topology with a capacitor^[7]

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图 3 LCC谐振拓扑等效电路

Figure 3. Equivalent circuit based onthe LCC topology

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图 4 直流电压增益

Figure 4. DC voltage conversion ratio

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图 5 输出功率归一化后的稳态分析

Figure 5. Steady-state behavior when the output power is equal to 1 per unit

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图 6 基于等效电路的小信号模型波特图

Figure 6. Bode diagram of the small signal model provided by the equivalent circuit

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图 7 LCC仿真电路

Figure 7. Simulation circuit based ont he LCC topology

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图 8 LCC谐振电流

Figure 8. Resonant current based on the LCC topology

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图 9 LCC输出电压

Figure 9. LCC output voltage based on the LCC topology

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