Hand held induction heater and various transformer embodiments therefor

Abstract

The handheld, self contained, air cooled induction heater which engages an A.C. power source, a rectifier to convert A.C. to D.C., an inverter which converts the D.C. to A.C. operating at substantially higher frequency than the A.C. power line frequency, a high frequency step-down transformer having magnetic cores, wherein at least a primary winding is split into two parts which are each wound around one of two suitable structures such as legs of the transformer magnetic core, and a secondary winding being connected to heat dissipating terminals functionally engaged to a work coil. The transformer for the induction heater has a primary and secondary wound around two suitable structures such as both legs of a magnetic core to reduce leakage inductance and increase power output compared to the primary and secondary windings of the same number of turns all wound on one leg of the magnetic core.