A Multi-mode Power Supply System Based on Three-Phase Bridge

Abstract

The invention discloses a three-phase bridge-based multi-mode power supply system, which comprises a three-phase bridge circuit, three groups of LC filter circuits connected in parallel, a switching control module, a detecting and conditioning circuit, a DSP control circuit, a drive circuit and an auxiliary power supply circuit, wherein the DSP control circuit is connected with an input end of thethree-phase bridge circuit through the drive circuit; the input end of the three-phase bridge circuit is connected with a DC power supply; an output end of the three-phase bridge circuit carries outoutputting through the three groups of LC filter circuits and the switching control module; the detecting and conditioning circuit is used for collecting voltage and current information of the input end of the three-phase bridge circuit and the voltage and current information of a first output terminal, a second output terminal, a third output terminal and a fourth output terminal; an informationoutput end of the detecting and conditioning circuit is connected with a collection input end of the DSP control circuit; and a control end of the DSP control circuit is connected with the switching control module. A multifunctional power supply employing AC / DC output is achieved through relay switching, and the three-phase bridge-based multi-mode power supply system is small in volume, high in cost performance, economical and practical.

Description

technical field [0001] The present invention relates to electric power systems, distributed power generation, energy Internet routers, electric vehicles, frequency conversion speed regulation, rail transit and flexible power transmission technology and other technical fields that require AC and DC power supply in the national economy and industrial and agricultural production, especially relates to a three-phase Bridge multi-mode power supply system. Background technique [0002] With the development of grid power electronics, a single power supply often cannot meet the requirements in practical applications, so it is often necessary to use multiple power supplies to supply power separately. This is neither economical nor convenient. [0003] At present, the performance of the three-phase bridge circuit is reliable and widely used, but it is generally only used in the three-phase inverter or three-phase PWM rectification system, and the electric energy provided is in a sing...

AI Technical Summary

Problems solved by technology

[0002] With the development of power electronics in the power grid, a single power supply often cannot meet the requirements in practical applications, so it is often necessary to use multiple power supplies to supply power separately

It is neither economical nor convenient

[0003] At present, the performance of three-phase bridge circuit is reliable and widely used, but it is generally only used in three-phase inverter or three-phase PWM rectification system, and the form of electric energy provided is single.

In practice, a single power supply often cannot meet the requirements, so it is often necessary to use multiple power supplies to supply power separately

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