Electrical Technology, Volume 1

30

Coupled Circuits

OBJECTIVES

In this chapter you will learn about:

• The need for coupling
• Classification of coupled circuits
• Performing calculations based on M = k√L₁L₂
• Response of different types of coupled circuits
• The effect of variations of coupling elements
• Mutual coupling
• Reflected impedance and its importance

Transfer of energy through magnetic couplings: (loose, critical and tight coupling)

30.1  INTRODUCTION

When the interaction between two loops of a circuit takes place through a magnetic field instead of through common elements, the loops are said to be inductively or magnetically coupled. The windings of a transformer, for example, ...