Importance of the Right Inductor for the Job
The induction heating coil (or inductor) is a very important part of every induction heating system. An induction heating coil is so much more than meets the eye. This coil is not just a piece of copper pipe, but a tuned solution to optimize your equipment performance and save on energy used. The coil transfers high-frequency electromagnetic energy from the induction system’s output into the work piece (load).
A typical coil consists of:
- Coil leads (or bus bars)
- Terminals – to connect to the induction system output
- Coil turns – windings of the copper pipe or wire
What Makes a Good Coil Design
Typically, each coil is designed for the specific application (shape of work piece, temperatures, materials, etc.). Coil calculations and simulations are performed to come up with the best coil design. Once the coil design is finalized, manufacturing drawings and coil forms or tooling are prepared and the custom coil is fabricated and tested.
What is important for the coil to work well?
Coil shape – The coil must be designed to provide access to the heated zone or part. There are many coil shapes that can be used – solenoid encircling, channel, internal, planer, C coil, and many more.
Solenoid Encircling Coils – Inductors used to heat the exterior of work pieces.
Channel Coil – You can think of this coil as a solenoid encircling coil that has been extended and flattened.
Planer Coils – These inductors get their name from their shape. They are used to create circular patterns on flat surfaces.