Low-power inverter circuit

Abstract

The invention relates to a low-power inverter circuit. The circuit solves the problem that an inverter is poor in safety and fails easily. The circuit adopts the technical scheme that the circuit comprises a power management master control circuit, a pre-drive master control circuit, a boosting rectification circuit, an inversion output circuit, a post-drive master control circuit, a fan control circuit, a failure protection circuit and a failure reminding circuit, wherein a digital power supply in the power management master control circuit drives an electronic element to work; a working power supply in the power management master control circuit is electrically connected with the inversion output circuit sequentially by the pre-drive master control circuit and the boosting rectification circuit; an output end of the power management master control circuit is electrically connected with the inversion output circuit by the post-drive master control circuit; the failure protection circuit is connected with the inversion output circuit and the pre-drive master control circuit; an output end of the failure protection circuit is electrically connected with the failure reminding circuit; and the fan control circuit is connected with the pre-drive master control circuit by the failure protection circuit. The circuit is simple in structure, safe and reliable.

Description

technical field [0001] The invention relates to a power conversion device, in particular to a low-power inverter circuit. Background technique [0002] The inverter converts DC power such as batteries and storage batteries into AC power, generally 220v50HZ sine or square wave. In layman's terms, an inverter is a device that converts direct current (DC) into alternating current (AC). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVD, VCD, computers, TVs, washing machines, range hoods, refrigerators, VCRs, massagers, fans, lighting, etc. [0003] Chinese Patent Publication No.: CN1149785A, published on May 14, 1997, discloses an inverter, comprising an input rectifier, an input filter, an output rectifier and an output filter, the input filter and the output rectifier are connected with A converter circuit composed of electronic switches and double ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current technical solution has insufficient safety of the inverter, which is easy to fail, resulting in subsequent damage to the load, and provides an inverter with good output waveform, large adjustable range, and better circuit protection. , isolation, self-switching, safe and reliable low-power inverter circuit

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