A High Voltage Converter for Auxiliary Supply Applications using a Reduced Flying Capacitor Topology
A High Voltage Converter for Auxiliary Supply Applications using a Reduced Flying Capacitor Topology
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使用简化飞跨电容器拓扑的用于辅助电源应用的高压转换器
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
D. G. Holmes
中科院分区：
文献类型：
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作者：
H. Torresan;D. G. Holmes
大多数电力电子转换系统使用低压控制和监控电路来管理开关过程和其他辅助功能。该电路通常由单独的低功率辅助电源供电，通常来自主电源级电源。通常，必须在主电源阶段之前对其通电，以确保变流器的安全运行。辅助电源可以使用低频交流变压器/二极管整流器或直接从电源转换器的主DC母线供电的开关模式电源(SMPS)来实现。虽然基于变压器/二极管的整流器设计和制造简单，但开关电源具有提高效率、减小体积和重量、可调节以及能够直接从主变流器的DC母线运行的优势。然而，用于高压变流器系统的基于SMPS的辅助电源的设计更具挑战性，部分原因是高电压、低功率、有源元件的范围更有限，部分原因是二阶和寄生效应的水平增加，在切换更高电压时，寄生效应变得显著。本文给出了一种完全稳压、非隔离的DC-DC辅助开关电源的设计方法和性能结果，该辅助开关电源来源于飞行电容多电平转换器系列。该拓扑实现了降低器件电压开关应力和严格调节电压输出。通过构建一个工作在1500 VDC电源下的200 W转换器，验证了设计方法。还提出了一种拓扑扩展，以牺牲较差的输出电压调节为代价，加入了电流隔离
Most power electronic conversion systems use low voltage control and supervisory circuitry to manage the switching processes and other ancillary functions. This circuitry is typically supplied from a separate low power auxiliary supply, commonly derived from the main power stage supply. Usually it must be energized prior to the main power stage to ensure safe operation of the converter. Auxiliary supplies can be realized using either a low frequency AC transformer/diode rectifier, or a switched mode power supply (SMPS) supplied directly from the power converter's main DC bus. While transformer/diode based rectifiers are simple to design and build, SMPS's have the advantages of improved efficiency, reduced size and weight, regulation and the ability to operate directly from the main converter's DC bus. However, SMPS based auxiliary power supplies for higher voltage converter systems are more challenging to design, partly due to a more limited range of high voltage, low power, active components, and partially due to the increased level of second order and parasitic effects that become significant when switching higher voltages. This paper presents a design methodology and performance results for a fully regulated, non-isolated, DC-DC auxiliary SMPS derived from the flying capacitor family of multilevel converters. The topology achieves reduced device voltage switching stresses and a tightly regulated voltage output. The design methodology has been confirmed by constructing a 200 W converter operating from a 1500 Vdc supply. A topological extension is also presented to incorporate galvanic isolation, at the expense of poorer output voltage regulation