The Great PLL Induction Heater Driver

Have you ever played with a manually tuned induction heater before? If you did, then you must know that how dull it could be…

Oh, for those that didn’t know what the induction heater is that is a key piece of equipment used in all forms of induction heating. Technically, an induction heater will operate at either medium frequency (MF) or radio frequency (RF) ranges. There are three main components from the basis of a modern induction heater, such as the power unit (power inverter), the word head (transformer) and the coil (inductor).

This project is a little bit different from the normal induction heater driver, as it will include the Phase Lock Loop (PLL) into it. A phase lock loop is a control system that can generate a signal and it has a fixed relation to the phase of a “reference” signal itself. Since the phase lock loop circuit responds to both the frequency and the phase of the input signals, hence it raises or lowering the frequency of a controlled oscillator automatically, until it’s matched to the reference in both frequency and phase.

In overall, this PLL induction heater driver will be one of the magnificent projects that you’ve ever built!