Parallel-mode inverter

Abstract

The invention relates to a parallel-mode inverter. The problem that the routine technique needs high-precision co-frequency sampling and a stable voltage follower is solved. The technical scheme is as follows: the inverter comprises a power distribution module, a CPU distribution management module, a self-synchronic output module, a constant current constant voltage drive module and a power conversion module, wherein the power distribution module is connected with an input end of the CPU distribution management module, an input end of the self-synchronic output module and an input end of the constant current constant voltage drive module; an output end of the CPU distribution management module is connected with a control end of the constant current constant voltage drive module, an output end of the constant current constant voltage drive module is connected with a control end of the power conversion module, an output end of the power conversion module is connected with the input end of the self-synchronic output module, and an output end of the self-synchronic output module is an output end of the parallel-mode inverter, and a feedback end of the self-synchronic output module is connected with a feedback input end of the CPU distribution management module. The output frequency can be automatically regulated along the power grid without using high-speed CPU operation.

Description

technical field [0001] The invention relates to a power conversion device, in particular to a parallel inverter. Background technique [0002] The rapid development of electrification has higher and higher requirements for the capacity, performance and reliability of the power supply system, which also promotes the continuous deepening of the research on power electronics technology. The realization of large-capacity power supply by parallel connection of multiple machines is recognized as one of the important directions for the development of power conversion technology today. The capacity of a single inverter power supply module is very limited. Expanding the capacity by connecting multiple modules in parallel can not only make full use of the advantages of the new full-control power switching device, reduce the volume of the system, reduce noise, but also improve the dynamic response speed and Versatility of inverter power converters. Conventional parallel inverters use...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the current technical solution and save the conventional parallel inverter through the high-speed DSP chip combined with the SPWM design to detect the balanced control of the output voltage and current. It requires high-precision same-frequency sampling and a stable voltage follower. This is a problem of relatively high cost in terms of software and hardware. To provide a parallel inverter that does not require high-speed CPU operations and whose output frequency can automatically follow the grid adjustment

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