Bidirectional ACDC circuit compatible with three-phase and single-phase alternating current power supply and control method thereof

Abstract

The invention discloses a bidirectional ACDC circuit compatible with three-phase and single-phase alternating current power supply and a control method thereof. The bidirectional ACDC circuit comprises four wiring terminals, wherein the first wiring terminal, the second wiring terminal and the third wiring terminal are respectively connected to a corresponding power converter first bridge arm middle point, a corresponding power converter second bridge arm middle point and a corresponding power converter third bridge arm middle point through a corresponding first inductor L1, a corresponding second inductor L2 and a corresponding third inductor L3; the fourth wiring terminal is connected to a power converter fourth bridge arm middle point; the four power converter bridge arms are in parallel connection and further are in parallel connection with a bus capacitor C4. The bidirectional ACDC circuit further comprises a first main switch device connected between the first wiring terminal andthe first inductor L1, a second main switch device connected between the second wiring terminal and the second inductor L2 and a third main switch device connected between the third wiring terminal and the third inductor L3. The bidirectional ACDC circuit disclosed by the invention can achieve a single-phase and three-phase alternating current power supply compatibility effect, can effectively expand a circuit use range, has convenience for a user to use and reduces cost.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging / energy storage, and relates to a bidirectional ACDC circuit compatible with three-phase and single-phase AC power sources and a control method thereof. Background technique [0002] The existing three-phase and single-phase bi-directional ACDC circuits are not compatible, and in some practical applications only single-phase (such as figure 1 shown) or a three-phase AC power source (such as figure 2 As shown), people need to develop two sets of devices to meet the requirements of different power sources, which are costly, inconvenient to use, and poor in compatibility. Contents of the invention [0003] In order to solve the above problems, the object of the present invention is to provide a bidirectional ACDC circuit compatible with three-phase and single-phase AC power supply and its control method. Through reasonable circuit structure design, the effect of single-phase and ...

AI Technical Summary

Problems solved by technology

[0002] The existing three-phase and single-phase bi-directional ACDC circuits are not compatible, and in some practical applications only single-phase (such as figure 1 shown) or a three-phase AC power source (such as figure 2 As shown), people need to develop two sets of devices to meet the requirements of different power sources, the cost is high, the use is inconvenient, and the compatibility is poor

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