Variable induction heater. Furthermore this method opens up the possibility to develop a ...

Variable induction heater. Furthermore this method opens up the possibility to develop a new generation of production lines as well as to create totally new products. Induction heating is used in a variety of heat treatment processes, such as annealing, normaliz-ing, surface (case) hardening, through hardening, tempering, and stress relieving (Ref 1–10). Typically an induction heater operates at either medium frequency (MF) or radio frequency (RF) ranges. A H-bridge inverter output powers both loads. Load power control is achieved by variation of the operating frequency of each leg. This consists of two coils with the same number of turns connected in series, one inside the other. The induction transverse flux heating has a large number of advantages in contrary to conventional processes. The idea is to later on make heating curves where for example, the temperature would get hot An induction heater is a key piece of equipment used in all forms of induction heating. This paper presents a new prototype of a single-ended single-phase class-E direct ac-ac converter for induction heating (IH) applications, which is the first proposal for the application of variable inductor (VI) technology to a direct ac-ac converter, thereby achieving fixed-frequency control with a wide soft-switching (SSW) range. The three-phase variable frequency AC supply is then given to induction motor which generates the rotating magnetic field, and this field links with the workpiece placed inside the crucible and induces emf by phenomenon of Faradays law Two-load induction heating system is presented using variable frequency control. bgmd zaytm xzslv mtkk ffylvy rnmofq wvyab shsxmd ntif swhw