Because of their reduced switching losses, allowing a higher operating frequency, dc-to-dc resonant converters have been used extensively in the design of smaller size and lighter weight power supplies. The steady state and dynamic behavior of both the conventional series and parallel resonant converters have been thoroughly analyzed and small-signal models around given nominal operating points have been obtained. These models have been used in the past to design controllers that attempted to keep the output voltage constant in the presence of input perturbations. However, these controllers did not take into account either load or components variations, and this could lead to instability in the face of component or load changes. Moreover, prediction of the frequency range for stability was done a posteriori, either experimentally or by a trial and error approach In this paper we use /spl mu/-synthesis to design a robust controller for a series resonant converter (SRC). In addition to robust stability the design objectives include rejection of disturbances at the converter input while keeping the control input and the settling time within values compatible with a practical implementation.
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机译：由于它们的开关损耗降低，允许更高的工作频率，因此DC-DC谐振转换器已广泛用于设计更小尺寸和更轻量的电源。已对常规串联和并联谐振转换器的稳态和动态行为进行了全面分析，并获得了给定标称工作点附近的小信号模型。这些模型过去曾用于设计控制器，这些控制器试图在存在输入扰动的情况下保持输出电压恒定。但是，这些控制器没有考虑负载或组件的变化，这可能导致面对组件或负载变化的不稳定。此外，可以通过实验或通过反复试验的方法在后验方法上对频率范围的稳定性进行预测。在本文中，我们使用/ spl mu /综合来设计用于串联谐振转换器（SRC）的鲁棒控制器。除了强大的稳定性外，设计目标还包括抑制转换器输入端的干扰，同时将控制输入端和建立时间保持在与实际实现兼容的值之内。
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