What is induction heating? How does it work?

A can of peaches, a cruise liner&#;s hull, a tub of yogurt, power station turbines, cables under the ground, pipelines under the waves, and countless trains, planes, and automobiles. What unites these different products is that induction heating is used to make them, maintain them, repair them, and recycle them. (In case the yogurt tub intrigues you, induction heating attaches the foil lid to the plastic container. As for canned peaches, induction heating helps coat the tin on the can&#;s inside so that conserved foods remain untainted.) 
Every day, across every continent, induction heating is used to improve our lives. Just take the manufacture of an average family car for example. Induction is used for hardening camshafts, crankshafts, gears and steering parts. It bonds doors, boots and bonnets and joins the pipes in the air-conditioning system. Induction heating is used to make everything from faucets to spaceships. Simply put, induction heating solutions can be profitably used in virtually any industrial application that requires heat.

With competitive price and timely delivery, Hitfar sincerely hope to be your supplier and partner.

We think that's pretty amazing. 

Correct process outcomes

The heating patterns, temperatures and heat penetration depths achieved during an induction heating cycle are directly and profoundly influenced by the coil&#;s physical characteristics. A poorly designed or manufactured coil yields poor results.

Cost control

A professionally designed and manufactured coil that is properly maintained has a much longer and more productive working life than its amateurish counter parts. Also, a correctly built and maintained coil helps minimize waste.

Overall system efficiency

ENRX induction heating systems are designed to operate with ENRX coils. Using the correct coils means significant long-term savings.

A crash course in coils

Designing and making induction coils is not easy. Here are just three of the many challenges that need to be overcome in order to make safe, efficient coils.

Through-flow rate

It is critical to achieve adequate flow of cooling water through the coil. This is especially true with high-power density coils, as low through-flow results in insufficient thermal transference. A booster pump may also be needed to maintain the desired flow. Good designers specify a purity level for the water, in order to minimize corrosion on the inside of the coil.

Magnetic flux concentrators

Concentrators focus the current in the coil area facing the workpiece. Without them, much of the magnetic flux may propagate around the coil. This flux could engulf adjacent conductive components. But, when concentrated, the flux is restricted to precise areas of the workpiece. Concentrators are made from laminations, or from pure ferrites and ferrite- or iron-based powders. Each material has its own pros and cons.

•  Laminations have the highest flux densities and magnetic permeability, and are less expensive than iron- and ferrite-based powders. Laminations are however stamped to a few standardized sizes and are therefore less flexible. They are also labour intensive to mount.
• Pure ferrites can provide outstanding magnetic permeability. But they suffer from low saturation flux density, and their brittleness makes them difficult to machine.
• Iron powders are easy to shape, offer high flux densities, and are easy to shape. However, care must be taken to protect against overheating, as internal losses or heat transfer from the heated workpiece mean such powders have a relatively low working temperature.

Impedance matching

It is necessary to achieve the correct impedance matching between the coil and the power source in order to use the latter&#;s full power. The designer must also consider that coils need five to ten times as much reactive as active power.

It&#;s an age-old problem for anyone who works on vehicles:

What can you do with a seized-up bolt?

In most cases, the answer is heat. But if you&#;re still using an open flame to get heat into your difficult components, we&#;ve got some news for you:

There&#;s a better way.

Here&#;s everything you need to know about induction heating, and how it can make your workshop a safer place.

How does an induction heater work?

Induction heating is a method of heating up components and parts &#; in a targeted area, and without using a flame.

That&#;s the basic concept. Now let&#;s get into a little bit of science:

Induction heating is all about electric currents and electromagnetic fields. That means it only works on materials that conduct electricity, like metals and semi-conductors.

(And for a vehicle workshop like yours, that&#;s perfect. Most vehicle components are made of metal!)

For more induction tankless water heaterinformation, please contact us. We will provide professional answers.

An induction heater uses a coil of wiring that&#;s placed around the component you need to heat. When an electric current passes through that coil, it creates an electromagnetic field that has an effect on the component inside the coil.

Specifically, an induction heater uses a high-frequency alternating current (AC) in the coil. This creates a rapidly alternating magnetic field, which generates electric currents (called &#;eddy currents&#;) inside the component.

When these eddy currents work against the electric resistance of the metal component, the &#;friction&#; of this resistance creates heat.

(It&#;s a bit like rubbing two sticks together to start a fire &#; but you&#;re really rubbing the electrons inside the component.)

And the result?

With an induction heater, you&#;re able to generate heat inside a vehicle component &#; at a rapid pace, and without the risks of using a flame.

What do workshops use induction heaters for?

In most cases, induction heaters are used on individual components that have seized up due to age or wear and tear.

That could mean a rusty bolt in an older engine, or the wheel nuts on a vehicle that hasn&#;t been serviced in a long time.

If you try to loosen these seized bolts with mechanical force alone (using a ratchet or other torque tools), you run the risk of stripping the fitting &#; or snapping the bolt off completely.

By heating up the nuts and bolts that have become seized, you&#;re causing the material to expand. This expansion helps to loosen the fitting and free up the seized bolt, so you can then go in with a conventional torque tool and remove the component that was previously seized.

Is induction heating better than other methods?

Before the invention of induction heaters, workshops would use more conventional methods of heating to help loosen seized components.

In most cases, that meant using a direct flame, like an oxyacetylene blow torch.

And that kind of tech comes with some problems:

With an open flame, it&#;s much harder to direct the heat into the component you&#;re targeting. And if you&#;re trying to heat a bolt that&#;s deep within the vehicle&#;s body (or tucked away at an awkward angle behind other parts and systems), you&#;re in for a tough time.

That lack of precision also means you&#;re running the risk of damaging the surrounding area. You&#;ll end up heating much more than just the intended component, and that could mean causing burn damage to the other parts and systems nearby.

And that&#;s before you start thinking about the safety risks that come with gas and flames:

There&#;s an obvious risk to the safety of the technician using an oxy torch. They&#;ll need extra training and extra PPE &#; and you&#;ll need to take extra precautions around the gas supply and any potential leaks.

But with an induction heater, things become much more simple and safe. With a purpose-built electric induction heater that&#;s designed specifically for workshop use, you&#;ll be able to:

• Heat isolated components with complete accuracy
• Heat up components that are obstructed or in awkward locations
• Avoid collateral damage to your vehicles and its other parts
• Reduce the risk of harm to your workers
• And save money along the way &#; with an electric-powered solution that avoids the costs of a gas supply.

Need a safer way to apply heat in your workshop?

It might seem like a complicated piece of tech. But when it comes to heating up parts and components, an induction heater is one of the simplest, safest, and most cost-effective ways to do it.

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