Backpack-type integrated machine master-slave control system and method

Abstract

The embodiment of the invention relates to the technical field of frequency conversion, and discloses a backpack-type integrated machine master-slave control system and method. The backpack-type integrated machine master-slave control system comprises N backpack-type integrated machines which are in communication connection, and N is a natural number being greater than one; in the N backpack-typeintegrated machines which are in communication connection, one serves as a master machine, and the rest serves as slave machines; each backpack-type integrated machine comprises a frequency converterand a pump which are connected; the frequency converters integrate the programmable logic control function; and the frequency converter in the mater machine is used for controlling the operation stateof the pumps in the mater machine and the slave machines according to the programmable logic control function, thus fluctuation of the water pressure can be reduced, the wire connection mode of the system is simplified, and the using cost of the system is saved.

Description

technical field [0001] The embodiment of the present invention relates to the field of frequency conversion technology, and in particular to a master-slave control system and method for a backpack-type all-in-one machine. Background technique [0002] At present, the water supply control usually adopts the constant speed operation of the water pump and the adjustment of the opening of the outlet valve to adjust the water volume and pressure of the water supply. The frequency conversion speed regulation constant pressure water supply control device can greatly improve the water supply environment of the water supply pipe network. Keeping at a constant set pressure value, the entire water supply system always maintains high efficiency, energy saving and optimal operation. In the prior art, one-to-multiplex frequency conversion combined with compound variable flow and frequency conversion water supply is mostly used. [0003] The inventor found that there are at least the fol...

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Problems solved by technology

[0003] The inventor found that there are at least the following problems in the prior art: the realization of one-to-many mode requires the switching operation of the industrial frequency converter, which will cause fluctuations in water pressure, and the use of relays, contactors and other devices at the same time improves the system efficiency. The cost of use makes the system wiring more complicated

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