This chapter presents guidelines that should be considered when designing inductor coils. It provides a detailed description of typical inductor coil shapes, including outer and inner field inductors, single-turn and multi-turn inductors, pancake inductors, hairpin inductors, double-hairpin inductors, channel or slot inductors, fork inductors, spoon inductors, powerline inductors, magnetic field concentrators, multiple inductors, folding inductors, and shielding gas inductors. The chapter provides an overview of inductor tube dimensions and inductor coil positioning. It also describes the design and fabrication of inductor coils.

This chapter describes important aspects of the interrelationship between the workpiece and the inductor coil, an understanding of which is essential for achieving an efficient soldering process and a solder joint with the desired performance and reliability. It also discusses induction soldering machine operation parameters, including temperature measurement and control sensors. The chapter illustrates the equipment used in a fully automated induction heating system. Fully automated soldering systems include temperature monitoring devices to control the temperature-time profile, the movement of workpieces, the supply of solder filler metal and flux, and the provision of shielding gas in the solder joint area.

Passive components can be broadly divided into capacitors, resistors, and inductors. Failure analysis of these components helps determine the root cause and improve the overall quality and reliability of the electronic systems. This article describes different failure analysis approaches used for these components. It discusses different types of capacitors along with their constructions and failure modes. The types include tantalum, aluminum electrolytic, multi-layered ceramics, film, and super capacitors. The article then provides a discussion on the two common types of inductors, namely, common mode choke coil and surface mount powder choke coil.

Coil design for induction heating has been developed and refined over time based on the theoretical principles applied in practice to several simple inductor geometries such as the classical solenoidal coil. This chapter reviews the fundamental considerations in the design of inductors and describes some of the most widely used coils and common design modifications. Specialty coil designs for specific applications are also discussed. The chapter concludes with sections devoted to coil fabrication and design of power-supply leads.