Thrust current control module used for wireless electric welding machine

Abstract

The invention discloses a thrust current control module used for a wireless electric welding machine. The thrust current control module used for the wireless electric welding machine comprises a battery pack, a master control circuit, a voltage comparison circuit and a controller; the master control circuit comprises a first BUCK loop and a second BUCK loop which are connected in parallel; the first BUCK loop comprises a diode D3, an MOS tube V1, a diode D1, an inductor L1 and a capacitor C1; the second BUCK loop comprises a diode D4, an MOS tube V2, a diode D2, an inductor L2 and a filtering capacitor C2; the anode of the diode D3 and the anode of the diode D4 are connected with the controller; a voltage sampling circuit is connected with an output load R0 in parallel; and the other end is connected with the controller. According to the thrust current control module, by monitoring the welding voltage value through voltage comparison feedback, after the load voltage is lower than a set value, the current of the controller is increased, adhesion of a welding rod and a weldment is avoided, and the welding quality and the welding efficiency of the electric welding machine are improved.

Description

technical field [0001] The invention relates to a DC-DC module, in particular to a thrust current control module for a radio welding machine, which belongs to the field of welding equipment. Background technique [0002] The electric welding machine is a device that uses the high-temperature arc generated when the positive and negative poles are short-circuited instantaneously to melt the solder on the electrode and the material to be welded to combine them. According to the type of output power supply, welding machines can be divided into two types, one is AC welding machine; the other is DC welding machine. Regardless of whether it is an AC welding machine or a DC welding machine, it needs to be powered by the mains when in use, so the use environment of the welding machine must provide a certain capacity of AC power. For some welding sites that cannot be connected to the mains or have a small capacity of the mains and a small amount of welding, it is impossible to supply...

AI Technical Summary

Problems solved by technology

However, this method requires the use of a generator, which has complex equipment, frequent maintenance, troublesome starting of the generator, loud noise, the need to use diesel or gasoline, high cost of use, and pollution during the power generation process.

2. Installing a power storage device on the welding machine, although this method can solve the above problems, the conventional solution is to use a large-capacity lead-acid battery to convert the DC voltage into an AC 220V or 380V through the DC / AC module. After the mains power is supplied, the conversion module inside the electric welding machine is powered. This method is costly, inefficient, and wasteful, and the equipment is heavy and not easy to carry. Because it passes through DC / AC and AC / DC or AC / AC Conversion, a complex conversion process, will inevitably affect conversion efficiency

When the welding load voltage is lower than a certain value, due to the decrease of the contact resistance of the welding rod, the temperature of the welding rod will drop sharply, so that the welding rod and the weldment will stick together and cannot work normally.

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