I am in process of designing a more flexible inductive heating tool. The main goal is to have easy ability to change frequency of the inductive element. Most of the simple circuits are LC tanks, but they are limited in frequency.
I was looking at simple H bridge configuration, but there is the risk of shoot-through when one pair is going off while the other pair is going on.
Another option I thought of is to use two inductor coils with each coil 180deg from each other magnetically, driven by independent MOSFET. One idea to switch them (flip-flop mode) is to use the source-sink ability of the 555, which means one N gate and one P gate MOSFET with 555 running 50% PWM with variable frequency.
Thought?
I was looking at simple H bridge configuration, but there is the risk of shoot-through when one pair is going off while the other pair is going on.
Another option I thought of is to use two inductor coils with each coil 180deg from each other magnetically, driven by independent MOSFET. One idea to switch them (flip-flop mode) is to use the source-sink ability of the 555, which means one N gate and one P gate MOSFET with 555 running 50% PWM with variable frequency.
Thought?