作者:
R. D. MIDDLEBROOK，SLOBODAN ĆUK
关键词:
DC-DC power convertors ； poles and zeros ； switched networks ； switching convertors ； transfer functions ； canonical circuit model ； computer aided design ； computer data bank ； dc-to-dc switching converter ； equivalent small-signal low-frequency linear circuit model
摘要:
A method for modelling switching-converter power stages is developed, whose starting point is the unified state-space representation of the switched networks and whose end result is either a complete state-space description or its equivalent small-signal low-frequency linear circuit model. A new canonical circuit model is proposed, whose fixed topology contains all the essential input-output and control properties of any dc-to-dc switching converter, regardless of its detailed configuration, and by which different converters can be characterized in the form of a table conveniently stored in a computer data bank to provide a useful tool for computer aided design and optimization. The new canonical circuit model predicts that, in general;switching action introduces both zeros and poles into the duty ratio to output transfer function in addition to those from the effective filter network.
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