Waveform-Based Design: Key Parameters And Figures Of Merit For Power Circuit And Magnetics Optimization

by Dennis Feucht, Innovatia Laboratories, Cayo, Belize , How2Power Today, Sep 16 2019

Focus:
This article offers a brief tutorial on waveforms commonly encountered in both magnetics and power circuit design, their performance parameters, and why they are important in design optimization. The waveform characteristics that concern us here are duty-ratio (duty-cycle) and duty-ratio complement for switched (discontinuous) waveforms and peak, average, rms and variation or ripple of continuous waveforms (x(t)). These parameters, in turn, are used to define figures of merit such as utilization (U) and figures of demerit such as form factor (κ) and crest factor (χ), which can be used to optimize waveforms in both power circuits and magnetic components. Ripple factors (γ) represent another set of figures of merit or demerit (or simply, performance parameters). These various terms permit design optimization without regard to scale.

What you’ll learn:

• How to understand the basic concepts and terminology used in waveform-based design optimization

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