Intermediate frequency power supply heating system

Abstract

The invention discloses an intermediate frequency power supply heating system. The intermediate frequency power supply heating system comprises a three-phase diode rectifier bridge device and an IGBT (Insulated Gate Bipolar Transistor) full-bridge single-phase inverter which are connected in sequence, and a selector switch, wherein the input end of the selector switch is connected to the output end of the IGBT full-bridge single-phase inverter; one of two ways of the output ends of the selector switch is connected to the input end of a homogeneous tube heating output transformer, and the other way of the output end of the selector switch is connected to the input end of a weld joint heating output transformer; and the output end of the homogeneous tube heating output transformer is connected to a homogeneous tube heating resonant capacitor bank, and the output end of the weld joint heating output transformer is connected to a weld joint heating resonant capacitor bank. The intermediate frequency power supply heating system has the following technical effects that the output matching of homogeneous tube induction heating and the output matching of weld joint heating are both met, the device volume is reduced, and one device meets technological requirements of two heating ways to be convenient for a user to use.

Description

technical field [0001] The invention relates to an intermediate frequency power supply heating system. Background technique [0002] At present, induction power heating equipment has a wide reference value in the heat treatment production process of steel pipes, steel rods and welded pipe welds. It has no environmental pollution, meets environmental protection requirements, is convenient for process control, easy to organize production, and has technical advantages. New technologies and new processes that are encouraged by the government and prioritized by enterprises. At the same time, common weld seam heating and whole pipe heating both require independent power supply for power supply and heating, that is, the weld seam heating system and the whole pipe heating system are two independent power supply systems. [0003] The disadvantages of the above-mentioned power supply equipment system for intermediate frequency heat treatment: [0004] First, due to the difference in...

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Problems solved by technology

[0004] First, due to the difference in heating process, the welding seam heating process needs a set of heating equipment, and the whole pipe heating process needs a set of heating equipment, which makes the production require two sets of product processes, and the customer needs two independent sets Power supply system, the introduction cost of the customer's equipment is relatively high

[0005] Second, because a heating process requires a power supply system, the equipment occupies a lot of space in the workshop on the production site, which also causes a corresponding increase in the initial investment of the workshop, including power supply, auxiliary systems, and power capacity applications. Initial investment also increased

[0006] Third, the equipment has a single function and can only be used to meet the production needs of one type of craft product, which limits the use of the equipment. These combined cannot achieve the maximum performance of high efficiency, energy saving and environmental protection

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