Lightning protection device for ultrasonic welding machine

Abstract

The invention provides a lightning protection device for an ultrasonic welding machine. According to the device, a common-mode filter circuit receives current signals of a power grid; a surge current suppression circuit receives common-mode filter signals output by the common-mode filter circuit, and the common-mode filter signals are subjected to suppression processing through the surge current suppression circuit; a surge current absorption circuit receives surge suppression signals output by the surge current suppression circuit and carries out absorption processing and sampling processing on the surge suppression signals; and a recognition and reset circuit receives sampling signals output by the surge current absorption circuit, and after the recognition and reset circuit carries out recognition and reset processing on the sampling signals, recognition signals and / or reset signals are output. According to the lightning protection device, it can be guaranteed that the ultrasonic welding machine normally runs on the occasion with the high surge current, and meanwhile an operator can know the running condition of the power grid in time.

Description

technical field [0001] The invention relates to the field of ultrasonic welding machines, in particular to a lightning protection device with lightning surge memory and maintenance-free and used on ultrasonic welding machines. Background technique [0002] Ultrasonic welding machine is a special welding equipment using ultrasonic technology. When welding plastic products, ultrasonic welding machine does not need to add any adhesives, fillers or solvents, and does not consume a lot of heat. It has the advantages of simple operation and high welding strength. . In actual use, when there is lightning and the instantaneous overvoltage of large electrical equipment invades the ultrasonic welding machine through the power grid line, it will cause damage to the ultrasonic welding machine or its components, and even cause the ultrasonic welding machine to malfunction, temporarily paralyze or system stop . [0003] In order to make the ultrasonic welding machine operate normally wi...

AI Technical Summary

Problems solved by technology

In actual use, when there is lightning and the instantaneous overvoltage of large electrical equipment invades the ultrasonic welding machine through the power grid line, it will cause damage to the ultrasonic welding machine or its components, and even cause the ultrasonic welding machine to malfunction, temporarily paralyze or system stop

[0003] In order to make the ultrasonic welding machine operate normally without external interference, a piezoresistor and a transient absorption diode are generally used in parallel at the entrance of the power grid to absorb the instantaneous surge current, thereby protecting the ultrasonic welding machine, but anti-surge components are often used Burned out by a strong instantaneous current, bursting, explosion, scorching, etc., leaving hidden dangers for the later operation of the ultrasonic welding machine

The traditional lightning protection device, because it belongs to the category of hard absorption, the lightning protection device is easy to be broken down and burned out

Images