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Inverter Welder Machine
Inverter technology is used to convert direct current into alternating current, which is the opposite of rectifier technology. Inverter power sources are called "inverter welding machines."
Principle of inverter welding machine
"Inversion" and "rectification" are two opposite concepts. Rectification is the process of converting alternating current into direct current, while inversion is the process of converting direct current into alternating current. The arc welding power source adopting inverter technology is called an "inverter welding machine".
The working process of the inverter welding and cutting equipment is to rectify and filter the three-phase or single-phase 50Hz power frequency AC to obtain a relatively smooth DC power. The inverter circuit composed of IGBT or field effect transistor converts the DC power into 15-100khz AC power. After the voltage is reduced by the intermediate frequency main transformer, the inverter again rectifies and filters to obtain a stable DC output welding current (or the AC power of the required frequency is output again). The control circuit of the inverter welding and cutting equipment is composed of a given circuit and a driving circuit. By processing the feedback of voltage and current signals, the cycle control of the whole machine is realized. The pulse width modulation (PWM) control technology is adopted as the core, to obtain the constant current characteristics of fast pulse width modulation and excellent welding and cutting process effects.
The inverter process requires high-power electronic switching devices. The inverter welding machine using an insulated gate bipolar transistor (IGBT) as the switching device is called an IGBT inverter welding machine. When welding, the circuit is closed. It is because the circuit is closed that the current in the whole closed circuit is equal everywhere; Since the resistance is different everywhere, especially the resistance at the unfixed contact is the largest, this resistance is called contact resistance in physics. According to the law of the thermal effect of current (also known as Joule's law), q = i2rt, if the current is equal, the part with larger resistance will generate more heat. When welding, the contact resistance between the contact of the electrode and the metal body to be welded is the largest, and the heat generated at this part will naturally be the largest. The electrode is also an alloy with a low melting point, which will be melted quickly. The melted alloy electrode core will adhere to the object to be welded and then be cooled, The welded object is bonded together.
As the inverter welding machine is a typical switching power supply (with great output characteristics), the output power is large and the working environment changes greatly, so the quality of components and parts is required to be good, to ensure stable operation and long service life.
What is the difference between an inverter welding machine and a DC welding machine?
The biggest difference between the inverter welding machine and the complex DC welding machine is the different modes of output current.
1. The model of the DC welding machine and AC welding machine is BX. The internal structure is a super large power frequency transformer. The model of DC welding machine generally starts with ZX. At present, the mainstream DC welding machine is the ZX7 inverter DC welding machine.
2. Inverter arc welding power source, also known as arc welding inverter, is a new type of welding power source. This power supply generally converts the three-phase power frequency (50Hz) AC network voltage into DC after rectification and filtering by the input rectifier and then inverts it into an intermediate frequency AC voltage of several kHz to several tens of kHz through the alternating switching action of high-power switching electronic components (thyristor SCR, transistor GTR, field effect transistor MOSFET or IGBT), and at the same time reduces it to several tens of volts suitable for welding through the transformer, And then rectified again and output a relatively stable DC welding current through reactance filtering.
3. The inverter welding machine has a good welding effect. The main difference lies in the weight. The weight is one-third of that of the AC welding machine or even lighter. It is convenient to move and suitable for the needs of the times. During welding, the inverter welding machine has the function of hot arc striking, which is more convenient for arc starting. Moreover, the power consumption of the AC welding machine is much larger than that of the DC welding machine. Therefore, power saving is a major feature of the DC welding machine.
Foshan Jinchun Industrial Automation Technology Co., Ltd. was established in 1998. It is a technology-intensive industrial company specializing in the development of welding technology and equipment research and manufacturing, integrating scientific research, production, and sales.
With rich experience and strong technical personnel, the company constantly innovates and develops various types of high-quality hardware wire rods, hardware mesh baskets, and other mechanical equipment. It has formed five series of electric fan and industrial fan guard production lines, wire tube evaporator and condenser production lines, pet cage production line, bag cage frame production line for bag filter, buckle machine, and chain machine production line. The company has accumulated more than ten years of development, production, and operation of welding machines and related products. The products are widely used in the fields of manufacturing and production of hardware appliances, lighting, kitchenware shelves, decorative handicrafts, cultural and sports products, electrical and electronic communication batteries, and industrial equipment automation. With a very wide user group.
The company pursues management to promote efficiency, quality for survival, technology for development, strictly implement the national quality assurance system standards, provide customers with high-quality, stable, and reliable products, and perfect high-quality services. Welcome people from all over the world to visit the company. business, and work together to create a better tomorrow.
