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首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >Alternate forms of the PWM switch model in discontinuous conductionmode [DC-DC converters]
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Alternate forms of the PWM switch model in discontinuous conductionmode [DC-DC converters]

机译：不连续传导模式下的PWM开关模型的替代形式[DC-DC转换器]

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摘要

A pulsewidth-modulated (PWM) DC-DC converter enters discontinuous conduction mode (DCM) as its inductor current attempts to reverse direction, but cannot do so because of switch implementation, and remains at zero in the last interval of each switching period. Three equivalent three-terminal nonlinear transformers are described as the models for the PWM switch in a DCM converter, each having one of the three terminals serving as the common terminal. Each model facilitates the analysis of those corresponding converters in which the PWM switch terminal corresponds to the common transformer terminal is DC-grounded. Examples are given to demonstrate how the models are used to derive the DCM criteria, and the ideal and nonideal voltage gains for the buck-boost, buck, and boost DC-DC converters. The results predicted by the models agree with those reported and verified in the literature
机译：脉宽调制（PWM）DC-DC转换器在其电感器电流试图反向时会进入不连续导通模式（DCM），但由于开关的实现而不能这样做，并且在每个开关周期的最后一个间隔中保持为零。描述了三个等效的三端子非线性变压器，作为DCM转换器中PWM开关的模型，每个具有三个端子之一作为公共端子。每种模型都有助于分析其中​​PWM开关端子对应于公共变压器端子的DC接地的那些相应转换器。举例说明了如何使用模型推导DCM标准，以及降压-升压，降压和升压DC-DC转换器的理想和非理想电压增益。模型预测的结果与文献报道和验证的结果一致

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