What are the main inductance principles used in electric welding machines?

A: We specialize in the production of welding machines.

Household electric welding machine, mainly depends on reliability, do not use it to break, and take it for maintenance, it is very troublesome.

I suggest you buy Ruiling's.

200A Huayuan's 215

It's all good. However, it will be more expensive, generally around 800.

It is recommended that you do not buy anything less than 600 yuan, this thing is still worth a penny. Good quality and low price are just ideal.

The welding machine in Shenzhen is a little better, the most expensive one is to buy the times, Aotai, and the more affordable one is to buy Relong, Hugong, and so on. Household buy ZX7-200 250 is too big to need 3-phase electricity, not suitable for home use. The dual power supply is easy to break and unstable. Hope it helps.

The current DC welding machine technology is relatively mature, and you can buy a ZX7-160 one. **Ranging from 500-1000. Big brands are more expensive, and small brands are cheaper. The most important thing is that the manufacturer's service of the welding machine you buy should keep up, and there is a place to repair it if it is broken.

1. The main focus of the household electric welding machine is reliability, and it is very troublesome not to use it and take it for maintenance. What brand is the main one also depends on the brand company's product guarantee.

2. The purpose of the electric welding machine is to use the high-temperature arc generated by the positive and negative electrodes in the instantaneous short circuit to melt the solder and the welded material on the electrode and combine the contacted objects. Its structure is very simple, it is a high-power transformer. Welding machines can generally be divided into two types according to the type of output power supply, one is AC power supply and the other is direct current.

They use the principle of inductance, the amount of inductance will produce a huge voltage change when it is turned on and off, and the high-voltage arc generated by the positive and negative poles in the instantaneous short circuit is used to melt the solder on the electrode to make them achieve the purpose of atomic bonding.

Buying a 200 amp moving iron AC welding machine is fully satisfied.

Your welding volume is not large, buy a 200-300 pieces of enough, you don't often take out to use, weight is not a problem, DC welding machine is divided into tap rectifier type, and inverter rectifier type, inverter rectifier type is the lightest weight, the best effect, but ** is also the most expensive, the price is the highest, you can afford to use it, there are too many wearing parts of DC welding machine, maintenance is not negotiable, in addition to the company, it is not recommended to buy, young people like light and easy to be fooled, If you often go out to buy an inverter small welding machine below 1500, it will be 10 catties, I used to sell welding equipment.

Now the household switching power supply welding machine is very good, the performance is very good, and it is convenient. There are many shops that open water and electricity welding that use this kind of shop.

First of all, you need to know whether the thickness of the material you weld is thick, the household generally uses a transformer, cheap and practical, easy to maintain, and the factory generally uses steam shielding welding, and you need to use carbon dioxide shielding gas

The wiring diagram is as follows:

The shell of the welding machine is protected to ground or zero (the grounding device can use copper pipe or seamless steel pipe, and the depth of its burial in the ground should be 1m, and the grounding resistance should be 4), that is, one end is connected to the grounding device with a wire, and the other end is connected to the grounding end of the shell of the welder.

1.It depends on whether the welding machine is marked with a three-phase welding machine or a single-phase welding machine.

2.If it is three-phase, then three are three-phase live wires If it is single-phase 220V, it is one fire and one zero, and one grounding wire.

3.If it is a two-phase 380, it is two live wires and one ground wire. Be sure to read it clearly before picking it up.

After the step-down, the three-phase alternating current has a total of 6 terminals, which are connected to the three-phase full-wave rectifier circuit composed of 6 rectifier elements, and the DC output is output by the two terminals after rectification.

Answer: With 380V three-phase electricity, you only need to choose 2 phase wires (there is a 380V voltage between the 2 wires), either one is connected to the 380 binding post, and the other is connected to the binding post that is not specified. If you use 220V household electricity, either one is connected to a 220V binding post, and the other is connected to a terminal post without instructions will do.

About the output: large, medium and small terminals indicate the gear, the welding machine should have a current output range about these three gears, if not, according to the thickness of the welding rod you use to connect the welding handle to the three terminals to test, which suitable is connected to which binding post. The 0 binding post is the ground wire, which is connected to the workpiece to be welded.

Three-phase electricity has two connections: star and triangle at the power supply end (or transformer) and load side.

The star connection of three-phase electricity is to connect one end of each phase power supply or load to one point, and the other end of them is used as a lead-out wire, which is the three phase wires of three-phase electricity. For the star connection, the midpoint (called the neutral point) can be drawn out as a neutral line, forming a three-phase four-wire system. It can also be drawn out without drawing out to form a three-phase three-wire system.

Of course, with or without a neutral wire, you can add a ground wire to become a three-phase five-wire system or a three-phase four-wire system, respectively.

The triangle connection of three-phase electricity is to connect each phase power supply or load end to end in turn, and lead each connected point out as the three phase wires of three-phase electricity. The triangular connection has no neutral point and cannot lead to a neutral line, so there is only a three-phase three-wire system. When the ground wire is added, it becomes a three-phase four-wire system.

In the three-phase electricity of the star connection, the line voltage is a multiple of the phase voltage, and the line current is equal to the phase current. When a three-phase load is balanced, no current flows over it, even if a neutral wire is connected. When the three-phase load is unbalanced, the neutral wire should be connected, otherwise the load of each phase will be unequal.

China's civil power supply uses three-phase electricity as a floor or residential line, mostly using the star connection method, its phase voltage] is 220V, and the line voltage is 380V, which requires a neutral wire, and generally has a ground wire, that is, a three-phase five-wire system. The incoming line is a single-phase line, that is, one of the three phases, and the voltage to the ground or to the neutral line is 220V. Some high-power air conditioners and other household appliances also use the three-phase four-wire connection method, and the inlet line must be a three-phase line.

Industrial electricity mostly uses high-voltage three-phase electricity above 6kV to enter the factory area, and becomes a lower voltage through the total step-down substation, the main distribution station or the workshop substation, and then goes deep into each workshop in the form of three-phase or single-phase power supply.

If it is a DC welding machine, it is three lines of fire, look at the letters on it. If it is L1L2L3, or ABC, it is a three-wire DC welding machine, if it is 0, 220, 380, 0 and 220 are connected to two-phase electricity, and 0 and 380 are connected to two live wires.

Electric welding machine: The electric welding machine uses the high-temperature arc generated by the positive and negative electrodes in an instantaneous short circuit to melt the solder and the welded material on the electrode to achieve the purpose of combining them. The structure is very simple, it is a high-power transformer, and the welding machine can be divided into two types according to the type of output power supply, one is AC power supply; One is direct current.

It is made by using the principle of inductance, the amount of inductance will produce a huge voltage change when it is turned on and off, and the high-voltage arc generated by the positive and negative poles in the instantaneous short circuit is used to melt the solder on the electrode to achieve the purpose of combining them.

It depends on whether the welding machine is marked with a three-phase welder or a single-phase welder If it is three-phase, then three are three-phase live wires If it is single-phase 220V, it is one fire and one zero, and one grounding wire If it is two-phase 380, it is two live wires and one grounding wire. Be sure to read it clearly before picking it up.

The main purpose of increasing the inductor reactor is to reduce the short-circuit current during welding ignition and protect the welding machine.

Reactors are also called inductors, and when a conductor is energized, it will generate a magnetic field in a certain space that it occupies, so all electrical conductors that can carry current have inductiveness in a general sense. However, the inductance of the energized long straight conductor is small, and the magnetic field generated is not strong, so the actual reactor is the wire wound into a solenoid form, called the hollow reactor; Sometimes, in order to make this solenoid have more inductance, an iron core is inserted into the solenoid, called an iron core reactor. Reactance is divided into inductive reactance and capacitive reactance, and the more scientific classification is that the reactor (inductor) and the capacitive reactor (capacitor) are collectively referred to as reactors, but because there were inductors in the past, and they were called reactors, so now people call capacitors that are capacitive reactors, and reactors specifically refer to inductors.

It is classified according to structure and cooling medium, by connection method, by function, and by use.

1. According to the structure and cooling medium: it can be divided into hollow type, iron core type, dry type, oil immersion type, etc., such as: dry air core reactor, dry iron core reactor, oil immersed air core reactor, oil immersed air core reactor, clamping dry air core reactor, wrapping dry air core reactor, cement reactor, etc.

2. According to the connection method: it is divided into shunt reactor and series reactor.

3. According to the function: it is divided into current limiting and compensation.

4. By use: subdivided according to specific uses, such as: current limiting reactors, filter reactors, flat wave reactors, power factor compensation reactors, series reactors, balanced reactors, grounding reactors, arc suppression coils, incoming line reactors, outgoing line reactors, saturation reactors, self-saturation reactors, variable reactors (adjustable reactors, controllable reactors), yoke reactors, series resonant reactors, parallel resonant reactors, etc.

The common reactors used in the power system are series reactors and shunt reactors.

Reactor (Figure 4).

Series reactors are mainly used to limit short-circuit currents, and there are also higher harmonics that are connected in series or parallel with capacitors in filters to limit higher harmonics in the power grid. The reactor in the 220kv, 110kv, 35kv, and 10kv power grids is used to absorb the charging capacitance reactive power of the cable line. The operating voltage can be adjusted by adjusting the number of shunt reactors.

The ultra-high voltage shunt reactor has a variety of functions to improve the operation of the reactive power of the power system, mainly including:

1. Capacitive effect on light no-load or light-load lines to reduce power frequency transient overvoltage;

2. Improve the voltage distribution on long transmission lines;

3. The reactive power in the line under light load is balanced as much as possible to prevent the unreasonable flow of reactive power and reduce the power loss on the line;

4. Reduce the power frequency steady-state voltage on the high-voltage bus when the large unit is parallel with the system, so as to facilitate the parallel of generators at the same time;

5. Prevent the self-excitation resonance phenomenon that may occur in the generator with long lines;

6. When the neutral point of the reactor is used through the small reactance grounding device, the small reactor can also be used to compensate the interphase and phase-to-ground capacitance of the line, so as to accelerate the automatic extinguishing of the latent power supply current, which is convenient for adoption.

It depends on whether you use it in the factory or at home.

To be honest, now the inverter technology is very mature, and even the inverter welding machines produced by some unknown small factories are already good. This thing is the trend, the general trend.

The choice of inverter welding machine (electronic type) has only advantages and no disadvantages, saving at least 30% of electricity, and the success rate of arc starting is more than 99%.

Each has its own advantages and disadvantages, the weight of the thyristor is light, but it is expensive, it is easy to fail, and the wire package is heavy, but it is low, and it does not like to be bad.

If you do small work, you can use electronics, which is light and flexible, and the power supply is easy to match. To do a big job, you have to use inductors, not to mention durable and carrying.

Inductance, that is, the soft and hard adjustment function of the arc.

According to the melting rate of the welding wire, adjust the growth rate of the welding wire droplet.

Controls the depth of weld penetration.

Significant reduction of welding spatter.

It is easy to use, convenient and easy to burn.

The coil is reliable and durable, but expensive and stupid, and needs to be eliminated.

Of course, it's an inverter DC welding machine

There is no need to add an inductor to the output of the AC welder.

Increase output impedance.

DC welding machine already has reactors.

No need to add more.

For some small factories and miscellaneous welding machines, even if the reactor is added, the inductance cannot be adjusted, and it is of no practical significance.

In summary, there is no need to add reactors to the welder, including hollow structure reactors.