Control circuit of high-efficient induction heating quenching machine tool

Abstract

The invention discloses a control circuit of a high-efficient induction heating quenching machine tool. The control circuit comprises an induction heater and a control circuit, and is characterized in that the control circuit comprises a three-phase alternating current bridge type rectifier circuit module, a power synthesis circuit module and an LC (inductor-capacitor) oscillation circuit module, wherein the power synthesis circuit module is used for performing power synthesis and then outputting to the LC oscillation circuit module; and in the LC oscillation circuit module, a primary coil L of a high-frequency quenching transformer is connected with an oscillation capacitor C to form a parallel resonance circuit, and a secondary level of the high-frequency quenching transformer is connected with the induction heater. Due to the adoption of the structure, the efficiency of the whole machine is high, and units of the power module comprise a transistor and other auxiliary semiconductor devices, so that the structure is compact, the self-loss is small, and the efficiency of the whole machine can achieve above 85%; and the output power is convenient to adjust, the reaction speed is high, the control is accurate, and the heating conditions can be selected arbitrarily. The control device disclosed by the invention further has the characteristics of simple structure, convenience in maintenance, safety and reliability.

Description

technical field [0001] The invention relates to an induction heating and quenching machine, in particular to a control circuit of a high-efficiency induction heating and quenching machine tool. Background technique [0002] At present, most of the high-frequency induction heating equipment designed and manufactured in my country adopts electronic tube high-frequency induction heating equipment. This kind of equipment not only has high energy loss and low work efficiency (<45%), but also has high working voltage (tens of thousands of volts) and stable load. Poor performance, large footprint, and the need for preheating before use, short service life of electronic tubes, high equipment maintenance costs and other defects. [0003] Since the 1980s, with the development of high-power semiconductor devices and the improvement of microelectronics technology and control technology, developed countries have made great progress in the development of all-solid-state high-frequency p...

AI Technical Summary

Problems solved by technology

Some domestic research institutes and manufacturers, in the research and manufacture of all-solid-state high-frequency induction heating equipment, still use the traditional design thinking method on the basis of the original electron tube high-frequency induction heating equipment technology to make it high-frequency, Large-capacity, high-efficiency, and equipment reliability are subject to many technical limitations, and there are quite a lot of difficulties

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