High-power simplified electrolytic and electroplating high-frequency switch power supply and control method thereof

Abstract

The invention discloses a high-power simplified electrolytic and electroplating high-frequency switch power supply and a control method thereof. The simplified electrolytic and electroplating high-frequency switch power supply comprises a three-phase inverter based on three phases and two arms, and a high-frequency DC / DC converter that is formed by serially connecting a single-phase half-bridge inverter, a high-frequency coupling transformer and a low-voltage full-wave rectifier; the three-phase inverter based on the three phases and two arms is formed by connecting two switch arms and two serially-connected capacitor branches at the direct-current side in parallel; the single-phase half-bridge inverter is formed by connecting a switch arm and two serially-connected capacitor branches at the direct-current side in parallel; the three-phase inverter and the single-phase half-bridge inverter commonly share one group of direct-current side capacitors; the input terminal of the three-phase inverter is connected with a power network by a three-phase inductor L; and the output terminal of the three-phase inverter is connected with the single-phase half-bridge inverter. The switch power supply has few switch devices, small loss, high efficiency, small direct-current ripples, high response speed and small voltage distortion and current distortion. The method in the invention has the advantages of improving the response speed of the three-phase inverter and tracking the change of the load power in real time.

Description

Technical field [0001] The invention relates to a switching power supply and a control method thereof, in particular to a high-power simplified electrolytic plating high-frequency switching power supply and a comprehensive control method thereof. Background technique [0002] In the application of power electronic technology and various power supply systems, switching power supply technology is at the core. In the electric vehicle, variable frequency drive and electrolytic plating industries, it is inseparable from the switching power supply technology, through the switching power supply to change the power frequency, so as to achieve nearly ideal load matching and drive control. The traditional thyristor or diode rectifier circuit is very large and heavy. If the Gordon switching power supply technology is adopted, its volume and weight will be greatly reduced, and it can greatly improve the power utilization efficiency, save materials, reduce costs, and achieve high-efficiency e...

AI Technical Summary

Problems solved by technology

The traditional thyristor or diode rectifier circuit is very large and bulky. If Gordon switching power supply technology is adopted, its volume and weight will be greatly reduced, and it can greatly improve power utilization efficiency, save materials, reduce costs, and achieve high-efficiency power consumption and Combination of high-quality electricity

[0003] For large-scale electrolytic electroplating power supplies, the traditional electroplating electrolytic DC power supply adopts the thyristor phase-controlled rectification mode, so when the conduction angle of the thyristor is small, the power factor is low, and the harmonic content to the power grid is large, which directly leads to the installation of power transformers, connecting wires, switches, etc. The capacity increases, and generally large-capacity silicon controlled rectifiers also need to add additional harmonic control and power factor compensation devices, which greatly increases the total investment cost of users

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