split parallel resonant inverter which is composed of a double-T type topological inverter bridge

Abstract

The invention discloses a split-type parallel resonant inverter composed of a double-T-type topological inverter bridge, the inverter includes an inverter bridge, Leakage reactance L3, LC resonant circuit, Capacitor C12, Capacitor C22, soft connection structure, which solves the problem that the copper electrode plate must be adopted between the inverter bridge and the LC resonant circuit of the parallel resonant inverter composed of the double-T type topological inverter bridges, A compact structure is assembled to avoid the influence of the distributed inductance of the connector between thetwo on the electrical characteristics of the inverter, the double-T topology inverter bridge and the LC resonant circuit can be connected separately and softly, to ensure that the distributed inductance between the inverter bridge and LC resonant circuit has no influence on the electrical characteristics of the inverter, The LC resonant circuit can be drawn out several meters away without reducing the overall efficiency and increasing the current loss, so as to meet the requirements of the inverter or the induction heating power supply composed of the inverter in different heating processes and heating occasions.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a split-type parallel resonant inverter composed of double T-type topology inverter bridges. Background technique [0002] The inverter is an important part of the power conversion device. The parallel resonant inverter composed of double T-topology inverter bridges has high efficiency, high output voltage, low withstand voltage requirements for switching elements, compact assembly structure, and very low main circuit distributed inductance and capacitor bank leakage inductance. It has the advantages of small high-frequency loss, low self-induced heat generation, high output resonant current and resonant volt-ampere capacity, etc., and is widely used in induction heating power supplies, resistance welding power supplies and other inverter power supply devices. [0003] The main circuit of the parallel resonant inverter composed of double T-topology inverter bridges is mai...

AI Technical Summary

Problems solved by technology

However, due to the huge current flowing through the inductor, it is necessary to use a thick water-cooled cable to connect the inductor or welding electrode away from the power supply device, that is, the resonant capacitor C in the LC resonant circuit. The problems brought about are that the cable inductance increases, the current loss is large, the overall efficiency is seriously reduced, and the connection and use are inconvenient, etc., which are far from meeting the requirements of production applications.

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