Melt-blown cloth electret power supply based on full-control rectifier bridge and half-bridge LLC resonance circuit

Abstract

The invention relates to the technical field of melt-blown cloth electret power supplies, in particular to a melt-blown cloth electret power supply based on a full-control rectifier bridge and a half-bridge LLC resonance circuit, which comprises a power grid alternating-current voltage Vac, a full-control rectifier bridge circuit, a first direct-current capacitor C1, a second direct-current capacitor C2, a first voltage-sharing resistor R1, a second voltage-sharing resistor R2, a half-bridge LLC resonance circuit and a high-voltage pack. The power grid alternating-current voltage Vac is connected with the input end of the full-control rectifier bridge circuit, the output end of the full-control rectifier bridge circuit is connected with the input end of the half-bridge LLC resonance circuit, and the output end of the half-bridge LLC resonance circuit is connected with the high-voltage pack. The loss of a power electronic device running in a high output power state for a long time can be reduced, the step-up transformation ratio of a flyback transformer is reduced, the design difficulty of the flyback transformer is reduced, and the reliability of the power supply is improved; the conversion efficiency of the rectification link is improved, the utilization rate of electric energy is improved, the effect of improving the production efficiency is achieved, and therefore the economic benefits of the melt-blown electret power supply are improved.

Description

technical field [0001] The present invention relates to the technical field of electret power supply for meltblown cloth, in particular to a kind of electret power supply for meltblown cloth based on a full-control rectifier bridge and a half-bridge LLC resonant circuit. Background technique [0002] At present, in the melt-blown fabric electret power supply, the main structure of the pre-stage rectification part of the commonly used power topology is an uncontrolled rectifier bridge. Although its structure is simple and easy to control, the effective value of the output voltage of the uncontrolled rectifier bridge is low. The power grid has large harmonic pollution. [0003] For this reason, the present invention proposes a melt-blown cloth electret power supply based on a fully-controlled rectifier bridge and a half-bridge LLC resonant circuit, and realizes control of the output voltage through bipolar PWM modulation and double closed-loop (PI+PR) control methods , effect...

AI Technical Summary

Problems solved by technology

[0002] At present, in the melt-blown fabric electret power supply, the main structure of the pre-stage rectification part of the commonly used power topology is an uncontrolled rectifier bridge. Although its structure is simple and easy to control, the effective value of the output voltage of the uncontrolled rectifier bridge is low. Power grid has large harmonic pollution

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