A novel Taiwan Tech Multi-Level Converter (TMC) for high-voltage input power conversion applications
A novel Taiwan Tech Multi-Level Converter (TMC) for high-voltage input power conversion applications
复制标题
用于高压输入功率转换应用的新型台湾科技多电平转换器 (TMC)
DOI：
10.1109/ifeec.2017.7992049
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Bo
中科院分区：
文献类型：
--
作者：
C. Leu;Pin;Bo
提出了一种适用于高压输入电源转换的台湾科技多电平变换器（TMC）。采用双初级变压器和箝位电容对传统的半桥变换器进行改造，得到了基本的双电平电路。通过将N个多层单元（MLC，每个单元有两个电容器和两个串联开关）堆叠到两电平电路中，从而推导出所需的（N+2）电平TMC。除了具有软开关操作外，每个开关上的电压应力都夹紧到2*Vi/m， （m：串联开关的总数），没有任何夹紧机构和/或复杂的控制时序驱动信号。此外，它可以有效地降低输入电流纹波，从而降低di/dt噪声。因此，可以使用更小的EMI滤波器组件来进一步提高功率密度性能。通过Simplis仿真波形说明了所提出的拓扑操作，并构建了一个输入300-400 V，输出功率为24V/10A的三电平LLC-TMC来验证理论分析。在高线半负荷工况下，该变换器的效率最高可达95.7%。
A novel Taiwan Tech Multi-Level Converter (TMC) is proposed for high-voltage input power conversion applications. A basic two-level circuit is obtained by modifying the conventional half-bridge converter with a dual-primary transformer and a clamping capacitor. By stacking N multi-level cells (MLC, each with two capacitors and two series switches) inserted into two-level circuit, consequently, a desired (N+2)-level TMC is derived. In addition to having soft-switching operation, the voltage stress on each switch is well-clamped to 2*Vi/m, (m: the total number of series-connected switch) without any clamping mechanism and/or complicated control timing driver signals. Moreover, it can effectively reduce the input current ripple resulting in reducing di/dt noise. Consequently, smaller EMI filter components can be used to further improve power density performance. The proposed topology operation is illustrated by Simplis simulation waveforms and a three-level LLC-TMC with 300–400 V input, 24V/10A output power is built to verify theoretical analysis. A maximum 95.7% efficiency of the proposed converter is achieved under high-line half-load operating condition.