Digital control system of electrical arc spraying power source

Abstract

The digital control system for arc spraying power belongs to surface technique field, which comprises a power transformer, a silicon controlled rectifier, a signal alignment circuit, a DSP, a Hall current sensor, a Hall voltage sensor, two photoelectric buffers, a H-bridge wire feed circuit, and a SCM; wherein, the signal alignment circuit sends signal into DSP; the DSP outputs trigger impulse signal after signal processing and calculating into buffer; the buffer outputs signal to control silicon controlled rectifier connected with power transformer. This invention improves stability, reliability and flexibility, and realizes information and digital control for spraying power.

Description

technical field [0001] The invention relates to a control system in the technical field of surface processing, in particular to a digital control system for electric arc spraying power supply. Background technique [0002] Arc spraying is a technology that generates an electric arc between metal wires, and the metal wires are atomized by high-speed airflow after being melted at high temperature, and the atomized particles are sprayed onto the metal surface at a high speed. Arc spraying has become the most competitive spraying technology in spraying due to its high efficiency, low energy consumption, high production efficiency, low cost, high coating bonding strength and excellent coating performance. Arc spraying power supply is one of the key factors to ensure the quality of spraying. At present, the commonly used arc spraying power supply is mainly silicon rectifier power supply and silicon controlled rectifier power supply, and the control circuit adopts analog circuit o...

AI Technical Summary

Problems solved by technology

Although this system uses software programming to control the external characteristics and the spraying process, its disadvantages are: (1) because the triggering of the main circuit thyristor requires a digital trigger circuit 8253, the storage of the program requires a program memory 2764, and the function keys need to pass parallel I / O interface 8255 input single-chip microcomputer, signal acquisition needs sampling amplifier circuit input single-chip microcomputer, so the integration degree of control circuit is low, the circuit is complicated; Set and other human-machine interface systems, so the modularity of the circuit structure design is low

(3) Since the system contains analog circuits, the control system is essentially a hybrid control method of analog and digital, and full digital control has not been realized.

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