Large-current intelligent digital welding system verification and calibration method

Abstract

The invention relates to a large-current intelligent digital welding system verification and calibration method which solves the problem that measurement is not accurate by means of an existing method. A load box, the current end of a sensor and the welding power output end of a welding system are sequentially connected in series in an end-to-end mode to form a circuit. A standard digital multifunctional meter is connected with the two voltage ends of the sensor, another standard digital multifunctional meter is in parallel connection with the two output ends of a welding power source, the welding power source is connected with an adjusting part through a special line to form a control circuit, and the load box is set to be a rated current value of the welding system to be measured; through power-on detection, verification and calibration, if the current error delta 1 of the welding system is larger than a current error limit value or the voltage error delta 2 of the welding system is larger than a voltage error limit value, the welding system is unqualified; if the current error delta 1 is smaller than or equal to the current error limit value and the voltage error delta 2 is smaller than or equal to the voltage error limit value, the welding system is qualified. The large-current intelligent digital welding system verification and calibration method provides technical guarantee and scientific bases for accurate, continuous and reliable operation of the welding system.

Description

Technical field: [0001] The invention relates to a verification and calibration method for a welding system, in particular to a verification and calibration method for a large current, intelligent digital welding system. Background technique: [0002] High current, intelligent digital welding system is mainly composed of welding power supply, control circuit and welding torch. The verification and calibration of the welding system is mainly a systematic verification and calibration of the welding power supply and the control circuit. At present, the following methods are mainly used for the verification and calibration of the welding system: first verify the instrument of the welding power measurement and display system; then use the clamp ammeter to measure the welding machine The working current of the welding power supply is compared with the current displayed by the welding power meter to judge the accuracy of the welding power output current. This method is difficult t...

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Problems solved by technology

[0003] In order to realize the verification / calibration of the welding system and the accurate verification / calibration of the current value at any point within the rated current range of the welding system, the present invention provides a method of using a load box instead of a welding torch to achieve stable output to form a measurement circuit, which can be used for The accurate verification of the current value at any point within the rated current range of the welding system solves the problem that the current method cannot be accurately measured, so that the abnormality and integrity of the welding machine cannot be correctly evaluated

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