Power regulation device for solid-state high-frequency induction heating power sources

Abstract

The invention discloses a power regulation device for solid-state high-frequency induction heating power sources. The power regulation device is connected with a high-frequency inverter and comprisesa main loop control unit, an AC / DC conversion module, a current limiting reactor and DC / DC conversion modules. The main loop control unit, the AC / DC conversion module, the current limiting reactor andthe DC / DC conversion modules are sequentially connected with one another; the AC / DC conversion module comprises a three-phase full-bridge rectification circuit; the DC / DC conversion modules comprisefilter capacitors, bridge inverter circuits, high-frequency transformers and rectification circuits, and the filter capacitors, the bridge inverter circuits, the high-frequency transformers and the rectification circuits are sequentially connected with one another. The power regulation device has the advantages that the turn-on time of switch elements in the bridge inverter circuits can be controlled, the duty ratios of output voltages of the bridge inverter circuits can be controlled, direct-current voltages outputted by the rectification circuits can be regulated, accordingly, output power of the high-frequency inverter can be regulated, and the problems of low power factors of power regulation by the aid of the traditional three-phase full-control rectifier bridge circuits with siliconcontrolled rectifiers (thyristors), severe harmonic pollution on power grids, large voltage reduction volumes of power-frequency three-phase voltage reduction transformers, low efficiency, high cost and the like can be solved by the aid of the power regulation device.

Description

technical field [0001] The invention relates to the technical field of solid-state high-frequency induction heating power supply, in particular to a power adjustment device for solid-state high-frequency induction heating power supply. Background technique [0002] Adjusting and controlling the output power of the solid-state high-frequency induction heating power supply is one of the main functions that the solid-state high-frequency induction heating power supply equipment should have, and it is also an important part of the solid-state high-frequency induction heating power supply. The power adjustment circuit determines the reliability, volume and weight of the solid-state high-frequency induction heating power supply equipment, and its performance is directly related to the efficiency of the solid-state high-frequency induction heating power supply equipment, the degree of harmonic pollution to the power grid, and its quality and life. . [0003] The power adjustment m...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a power adjustment device for a solid-state high-frequency induction heating power supply, which solves the problems of low power factor and low Harmonic pollution to the power grid is serious, and the use of power frequency three-phase step-down transformers has problems such as large volume, low efficiency, and high cost.

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