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Traditional switching inverters are mostly controlled by analog. With the rapid development of digital control chips, digital-analog hybrid control gradually appeared. Although analog control has many advantages such as good continuity and fast response speed. But it has many inherent defects, such as complex circuit, difficult debugging, poor stability and consistency, etc. With the development of modularization and series-parallel technology of switching inverters, especially in distributed systems, the control of switching inverters has networked functional requirements, and analog control circuits will be powerless.

The emergence of various dedicated high-speed digital processing chips digital signal processors (DSP) and large-scale field programmable logic gate array chips (FPGA) has greatly improved the processing speed and processing capacity of information, making the digitalization of switching inverters , the realization of networked control has become an important trend in the future development. Its advantages are mainly reflected in the following aspects: the control of the switching inverter can be networked, that is, the work of the inverter can be changed in real time according to the instructions of the control center; its working parameters can be transmitted through data communication ; Various high-performance control algorithms can be realized conveniently, including various parameter-settable or adaptive PID control, repetitive control, various intelligent controls, etc.; control strategies and control can be flexibly performed according to different load characteristics Adjustment of methods and control parameters, usually without remaking the hardware circuit board, all work can be done through software design; easy to achieve standardized design, making reliability improved, consistent, and easy to maintain; easy to achieve system monitoring, failure Redundant controls for diagnostics and safe operation.