Super-power low-harmonic high-power-factor high-frequency switching power supply topology

Abstract

The invention provides a super-power low-harmonic high-power-factor high-frequency switching power supply topology, belongs to the technical field of topology circuits, and three-phase BOOST is formedthrough alternating current side inductors (Lm, Ln and Lo) and controlled switches (Qa, Qb, Qc, Qd, Qe and Qf) and gives different conduction sequences, so that high power factor and low harmonic onthe network side can be realized, stable direct current voltage is obtained at two ends of the energy storage capacitors (Cin1 and Cin2), and the harmonic on the network side can be effectively reduced; The power factor is improved, the system efficiency is improved, and a solution is provided for efficient utilization of super-power energy; and by adopting the N-phase parallel BUCK circuit, voltage and current ripples on a load side can be effectively reduced, the control is easy, and very high switching frequency can be realized, so that the size of a magnetic component is greatly reduced, and the system efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of topology circuits, and in particular relates to an ultra-high-power, low-harmonic, high-power-factor, and high-frequency switching power supply topology. Background technique [0002] According to analysis, since 2001, my country's energy consumption structure has not changed significantly. Petrochemical energy, especially coal consumption, has always been in a dominant position in primary energy consumption, accounting for more than 90% and 60% of the total. Traditional energy will cause great damage to the environment and cause multiple pollutions. [0003] With the development of modern industry and the urgent need of human beings for green energy, hydrogen is gradually being valued by people. Based on the unique characteristics of electrolyzers based on the electrolysis of water by lye for hydrogen production, efficient hydrogen-producing electrolyzers require lower voltage and super-high current. ...

AI Technical Summary

Problems solved by technology

The use of traditional silicon-controlled rectifiers (SCR) for hydrogen production equipment has low efficiency, large harmonics, and low power factor. While causing great harm to the power grid, the low efficiency also causes a great waste of electric energy.

Moreover, the current topological diagram, due to a series of problems such as the size of the magnetic device and the process, the power of the switching power supply is greatly limited. The development of a 30KW and 50KW high-frequency switching power supply is very difficult, and some special topologies are required, and the cost is very high. High, for large-scale hydrogen production, the power level is greatly limited

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