Modularized serial inverter in power supply of medium-frequency induction furnace

Abstract

The invention discloses a modularized serial inverter in a power supply of a medium-frequency induction furnace. The modularized serial inverter comprises an inverter reactor component, a silicon-controlled rectifier component, a diode component and two resistance-capacitance absorbing circuit components, wherein the inverter reactor component, the silicon-controlled rectifier component, the diode component and the two resistance-capacitance absorbing circuit components are integrated on one independent framework; the inverter reactor component comprises a first choke coil, a second choke coil and an over voltage protection coil and is positioned in the center of the framework; the silicon-controlled rectifier component comprises a first silicon-controlled rectifier and a second silicon-controlled rectifier and is positioned at one side of the framework; the diode component comprises a first diode and a second diode and is positioned at the other side of the framework; and the two resistance-capacitance absorbing circuit components are respectively positioned at the top and the bottom of the framework. With the adoption of the modularized serial inverter provided by the invention, the running efficiency of equipment is greatly improved; and the melting rate reaches the maximum, and the medium-frequency induction furnace adopting the modularized serial inverter can save electricity by 10% when compared with the conventional medium-frequency electric furnace.

Description

technical field [0001] The invention relates to a power supply device for an induction electric furnace, in particular to a series inverter in a modular intermediate frequency induction electric furnace power supply. Background technique [0002] The principle of the medium frequency induction furnace is electromagnetic induction, and its heat is generated in the workpiece itself. Compared with the coal furnace, the induction heating furnace will not allow the workers to be baked and smoked by the coal furnace under the scorching sun, and it can also meet the various requirements of the environmental protection department. Item requirements, so it will be the future development trend of the forging industry. The current medium frequency induction furnace usually consists of a medium frequency power supply (electrical part) and an induction furnace body (mechanical load). Regardless of the form, the intermediate frequency power supply device includes: rectifier control panel...

AI Technical Summary

Problems solved by technology

[0003] At present, some intermediate frequency power supply devices of domestic manufacturers in the electric furnace industry basically use parallel resonant inverters for the inverter control panels. very low rate

Moreover, due to the generation of harmonics to the power grid due to inverter power adjustment, the quality of the power grid is polluted.

Due to the defect of the control method, the inverse conversion flow often fails, and it is impossible to guarantee a 100% start-up success rate, thus increasing the electrical operation loss of the customer

Images