Three-phase inverter conversion device based on LCL filter

Abstract

A three-phase inverter conversion device based on an LCL filter provided by the present invention comprises a shell, the interior of the shell is movably connected with a current conversion mechanism, the current conversion mechanism comprises a switching assembly used for generating alternating current and a protection assembly used for monitoring current magnitude and automatically disconnecting, the switching assembly is movably connected to the interior of the shell, and the protection assembly is movably connected to the interior of the shell. The protection assembly is movably connected to the exterior of the shell; current inversion is efficiently and conveniently achieved by connecting a logic circuit into the input end, the inverted current is conveyed to the electric piece through the output end, then the inverter converts the current more conveniently, meanwhile, the coil is electrically connected with the output end, the size of the inverted current is measured in real time, the coil extends to drive the sliding plate to slide, and the current is accurately and accurately converted. And the sliding plate slides to separate the external plug from the electric sheet through the jacking block, so that the electric equipment can automatically cut off a circuit under low current, and the reliability of the inverter is improved.

Description

technical field [0001] The invention relates to the technical field of inverters, in particular to a three-phase inverter conversion device based on an LCL filter. Background technique [0002] The inverter is a converter that converts DC power into constant-frequency constant-voltage or frequency-modulated voltage-regulated alternating current, generally 220V, 50Hz sine wave. It consists of an inverter bridge, control logic and filter circuit. Widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVDs, VCDs, computers, TVs, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting, existing inverters based on LCL filters It is cumbersome to operate the inverter during use, which reduces the practicability of the inverter. At the same time, the existing inverter cannot automatically measure the magnitude of the inverter current when the inverter current is relatively high. Automatically cut ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned existing inverters based on LCL filters, it is cumbersome to operate during use, which reduces the practicability of the inverters. At the same time, the existing inverters cannot automatically measure the inverter when it is used for power consumption equipment. The size of the final current, nor can it automatically cut off the circuit when the inverter current is small to avoid damage to the electrical equipment in the low-power state for a long time. At the same time, the existing inverter does not have the function of automatically preventing overheating and fire protection. To achieve the above goals of convenient operation, automatic measurement of inverter current, low current automatic cut-off, and overheat protection, the present invention achieves the following technical solutions: a three-phase inverter conversion device based on an LCL filter, including a casing, The inside of the housing is movably connected with a current conversion mechanism, and the current conversion mechanism includes a switching component for generating alternating current and a protection component for automatic disconnection of current monitoring, and the switching component is movably connected inside the housing, so The protection components mentioned above are movably connected to the outside of the shell

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