Adaptive model following control of switching regulators

38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003. Pub Date : 2003-10-12 DOI:10.1109/IAS.2003.1257792

M. Elmore, V. Skormin

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Abstract

Parametric uncertainty in switching power supplies (SPS) and their loads can result in unstable operation or failure to meet performance specifications. Adaptive model following control (AMFC) is proposed to assure robust operation of SPS. This control approach results in stable operation and desired transient response of switching converters, while mitigating the effects of parameter uncertainty and drift. An adaptation mechanism is designed utilizing the hyperstability and positivity principles. AMFC of buck, boost and buck-boost converters operating in the continuous mode is considered: an analog hardware implementation of AMFC of a buck converter is demonstrated and compared to simulation results. The laboratory data validates the simulation model. The data demonstrates that AMFC results in stable operation with nearly invariant open-loop frequency response with more than a 2:1 variation in power converter component values. It is shown that with AMFC audiosusceptibility is unchanged, whereas, output impedance is lowered, compared to conventional voltage mode control.

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开关稳压器控制后的自适应模型

开关电源及其负载参数的不确定性会导致开关电源运行不稳定或不能满足性能要求。为了保证系统的鲁棒性，提出了自适应模型跟踪控制(AMFC)。该控制方法在减小参数不确定性和漂移影响的同时，实现了开关变换器的稳定运行和理想的瞬态响应。利用超稳定性和正性原理设计了自适应机制。考虑了工作在连续模式下的降压、升压和降压-升压转换器的AMFC:演示了降压转换器AMFC的模拟硬件实现，并与仿真结果进行了比较。实验数据验证了仿真模型的正确性。数据表明，AMFC具有稳定的运行，其开环频率响应几乎不变，功率变换器元件值的变化大于2:1。结果表明，与传统的电压模式控制相比，AMFC的声敏率不变，但输出阻抗降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.

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