Magnetic-Electric Analogs Relate Magnetic Fields To Familiar Circuit Quantities

by Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, May 16 2018

Focus:
Circuit designers are usually able to think more easily about the circuit behavior of capacitors than inductors. Inductance is the dual of capacitance; exchange v and i in capacitor equations and they apply to inductors. This dualism can be extended to circuit laws too, and the three most basic laws of circuits (Ohm’s Law, KVL and KCL) have magnetic counterparts. In this article, the author derives these equivalents and examines them. Finally, he explains how the magnetic counterparts to circuit laws can be applied in transformer design.

What you’ll learn:

• How to understand magnetics concepts through analogies to electrical circuit parameters and basic circuit laws
• How to apply magnetic-electric analogs when designing power transformers and inductors

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