Induction heating drives conduction cooled plastic film capacitor production

Induction Heating Industry

The induction heating market is set to see upward growth in the next few years, due mainly to the growing popularity of this particular heating technique that sees application in a wide array of industries, most notably the automotive industry, which applies this in automotive production processes such as bonding, preheating and forming of different automobile parts, to name only a few of its uses.

In addition, induction heating is utilized in the production of vehicles ranging from bulldozers to spacecrafts to container ships as well as a vast array of industrial processes such as surface hardening, forging and welding. It also finds applications on such banal tasks as the sealing of the plastic lids in pharmaceutical bottles.

And with the increasing focus on the use of sustainable sources of energy, it is no surprise that induction heating is steadily gaining more and more traction since the technology makes no use of any fossil fuels. Additionally, since the equipment does the job with an invisible magnetic field, heating is done fuss free and waste free.

As manufacturers hone in on the delivery of more state-of-the-art and client-specific heating devices, the market is projected to climb up at a steady pace over the next five years, registering a compound annual growth rate of 2.3% in terms of revenue. The global market size is also expected to hit the $370 million mark by 2024.

But before we go any further, let’s first take a look at what induction heating is.

Induction Heating Defined

Induction heating is a procedure that is relied on for industrial needs such as bonding, hardening or even softening metals and other materials. For a lot of contemporary production processes, induction heating provides an ideal blend of speed, control as well as consistency.

Induction heating makes use of eddy currents that were discovered back in 1855 by a French physicist named Leon Foucault. When a moving magnetic field passes through any kind of conductive material, current flow is produced in the object.

The current flow then generates a second electric field, which in turn creates a second current flow called eddy current, aptly named because it flows in a spherical outline, akin to how water can whirl around in a stream when it goes around an obstacle. The push and pull effect between these two fields leads to heat being generated in the conductor. This specific use of eddy currents is used in tasks that are as commonplace as cooking as well as industrial processes like melting steel.

Induction heating has a number of notable benefits, which include:

· A safer heating procedure, because of the contactless nature of the procedure

· The potential for higher and better efficiency because of the direct heating of the induction target

· Quicker heating for augmented productivity because of the absence of thermal inertia and direct heating

· Precise control that paves the way for advanced heating procedures

These benefits have resulted in the extensive application of induction heating technology in many different fields that range from industrial processes to domestic and even biomedical applications.

What are the Applications of Induction Heating?

It is utilized in the production of a wide variety of items like bulldozers, spacecrafts, faucets and as mentioned above, the sealing of the plastic lids of pharmaceutical containers.

The basic design of induction heating equipment makes use of a coil of wire along with an AC current to bring about an altering magnetic field in the item to be heated which is called workpiece.

The workpiece is then planted inside the magnetic field, without making any contact, and then, heated to the preferred temperature. Temperatures can reach very high levels depending on the material that needs to be heated.

Induction Heating Process

The process is wholly clean, as it requires no need for fossil fuels. Any parts that were exposed to the induction process just heat up, which means there is no cleanup needed nor is there any cause for concern of contamination of the workpiece.

There are other processes that make use of induction heating. This includes induction tempering, which changes the physical attributes of materials to fulfill the needs of specific applications. Induction heating could also be utilized to melt down either ferrous or non-ferrous metal like any nuclear material or different alloys expended in the fields of medicine or dentistry.


Induction Heating Provides Real Solutions to Real-World Problems

The “Tylenol Murders” in Chicago in 1982 was a result of bottles that were maliciously laced with cyanide. This eventually led to the pharmaceutical industry changing the way they packaged their products, birthing the use of tamper-proof bottles.

The foil that is often used to secure the lid of over-the-counter drugs makes use of induction heating. It all starts by putting the conducive foil into the cap, which is then screwed down before the package is settled inside an induction heating coil. The foil then heats up, with the adhesives around the edge sticking it to the lip of the container.


The three main constituents of an induction heating machine are the working coil, the power supply and the tank circuit. The working coil generates the electromagnetic field that produces the heat, the power supply converts the line signal to an alternating current and delivers it to the workhead, and the tank circuit generates the operating frequency.

The tank circuit consists of an inductor and a capacitor; this makes the induction heating equipment industry a major consumer of high power, high RMS current capacitors.

While high power ceramic plate and water cooled ceramic capacitors are suitable for such applications, there is an entire industry dedicated to the design and manufacture of conduction cooled plastic film capacitors intended primarily for the induction heating equipment industry.

Alcon Electronics, Celem Power Capacitors, and Illinois Capacitors each manufacture an extensive range of conduction cooled plastic film capacitors for applications ranging from 400Vrms to 1100Vrms and capacitances ranging from 0.01µF to 37µF.

Conduction Cooled Plastic Film Capacitors

Capacitor Faks is currently uploading data sheets from these manufacturers so that you can find the conduction cooled device you need quickly and easily.

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