Inverter welding machine ZX7 200 repair

ZX7-500S D.

1.When the machine is not turned on, disconnect the two main circuit routes and unplug the push wire.

2.Turn on, the multimeter hits to 200V, the black watch pen is connected to the ground wire of the motherboard, the red watch pen detects and pushes in turn, IC3, IC4, and the value of the multimeter is displayed when it is normal.

3.When the push is normal, turn it off, connect a 10W 15K charging resistor in series on one of the main circuits, and plug in one of the push wires, 4In the case of connecting the charging resistor, turn on, the multimeter is connected to the diode, the black meter pen is connected to the negative pole of the host, and the red table pen is connected to the positive pole of the host, and the value displayed by the multimeter is about 24V, that is, the output of the host is normal.

5.Shut down, the multimeter hits the diode file, and the rectifier bridge is measured by the method of detecting the three-phase rectifier bridge mentioned above, and the multimeter displays a value of about 410V, that is, the rectifier bridge is normal.

6.The multimeter plays the diode file, and the D92 on the radiator is measured, and when the multimeter is displayed as 320V, it is normal.

7.Detection of ZX7-500S D 40T120 board: In the case of shutdown, the multimeter hits 75V, the red table pen is connected to the positive pole of the capacitor, and the black table is connected to the positive pole of the module, as shown in the figure, when the measurement method and the value of the multimeter are displayed as 398V, that is, the 40T120 board is normal.

8.Turn on, the multimeter hits 750V, and the two meter pens measure the three-phase input end of the host respectively, as shown in the figure, the multimeter shows that the value is about 380V, that is, the host is not lacking phase.

What failure? Let me fix it for you. 10 years of professional technology.

ZX7-400 is a product model of manual arc welding machine, full name of model: ZX7-400 (PE23-400).

The welding machine uses IGBT module as the main power device, and uses advanced microcomputer control technology. The machine is highly functional and reliable, and is designed and manufactured for high loads and extremely harsh working environments. It is widely used in the welding of various metal structures in hydropower, power construction, metallurgy, chemical construction, aviation, aerospace industry, vehicle manufacturing and other industrial fields, and is an inverter welding machine that users from all walks of life can trust.

Summary. What is the reason why the ZX7-315 inverter welding machine is protected as soon as it is welded.

Dear, it may be that the original is broken, or it may be caused by too high temperature.

If the temperature is too high, there are two types of overheating protection of the welding machine: real protection and false protection. If it is true protection, check the fan, if the fan is running normally, check whether the power device is normal, if it is normal, it means that the welding machine is short-circuited, and only the short-circuit part can be replaced. If it is false protection, just replace it with a temperature relay.

The temperature rise of the welding machine should not exceed 60 degrees for grade A and 80 degrees for grade B during load welding, otherwise it should be stopped and cooled before welding. In welding, it is not allowed to regulate the current. When the welding is stopped, the adjustment handle must be used to adjust, not too fast or too violently, so as not to damage the adjuster.

What is the reason why the ZX7-315 inverter welding machine is protected as soon as it is welded.

ZX7-315 inverter welding machine is protected as soon as it is welded, it may be that the original is broken, or it may be caused by too high temperature If the temperature is too high, there are two kinds of overheating protection of the welding machine: true protection and false protection. If it is true protection, check the fan, if the fan is running normally, check whether the power device is normal, if it is normal, it means that the welding machine is short-circuited, and only the short-circuit part can be replaced. If it is false protection, just replace it with a temperature relay.

The temperature rise of the welding machine should not exceed 60 degrees for grade A and 80 degrees for grade B during load welding, otherwise it should be stopped and cooled before welding. In welding, it is not allowed to regulate the current. When the welding is stopped, the adjustment handle must be used to adjust, not too fast or too violently, so as not to damage the adjuster.

Dear, I hope it can help you.

1. ZX7 represents DC inverter welding machine;

2. The difference between the two is that the rated welding current is different, the rated current of the ZX7-200 welding machine is 200A, and the rated current of the ZX7-250 welding machine is 250A.

"Inverter" and "rectification" are two opposite concepts. Rectification is the process of converting alternating current into direct current, while inverter is the process of changing direct current into alternating current.

The working process of the inverter welding and cutting equipment is to rectify and filter the three-phase or single-phase 50Hz power frequency alternating current to obtain a smoother direct current, and the inverter circuit composed of IGBT or FET will change the direct current into 15 rubber and 100kHz alternating current, and after the intermediate frequency main transformer is stepped, the rectifier filter is used again to obtain a stable DC output welding current (or the alternating current of the required frequency of the inverter output again).

The control circuit of the inverter welding and cutting equipment is composed of a given circuit and a driving circuit, etc., and the cycle control of the whole machine is realized through the feedback of voltage and current signals, and the control technology of PWM with pulse width modulation (PWM) as the core is adopted, so as to obtain the constant current characteristics of fast pulse width modulation and excellent welding and cutting process effect.

Summary. Dear, I'm glad to answer for you;

Answer: Please confirm whether the current is not reached, or the total power is not reached. The most straightforward way to test whether the current can reach the rated value is to direct the output short circuit. If it is determined that the current cannot go up, the normal situation is that there is a problem with the current sampling.

Generally, the current sampling of welding machines uses manganese copper resistors, and most of the common problems are that the sampling resistors are loose, resulting in excessive sampling. 。

What is the fault of ZX7-400K inverter DC arc welding machine with a delay light on?

Dear, the lease judgment is happy to answer for you; What is the fault of ZX7-400K inverter DC arc defect welding machine with a delay light on? Answer: Please confirm whether the current is not reached, or the total power is not reached. The most straightforward way to test whether the current can reach the rated value is to direct the output short circuit.

If it is determined that the current cannot go up, the normal situation is that there is a problem with the current sampling. Generally, the current sampling of welding machines is manganese copper resistors, and most of the common problems are loose sampling resistors, resulting in excessive sampling. 。

I hope mine can help you, if you are satisfied with my service, please give a thumbs up, I wish you all the best!

1. The wattage of the inverter welding machine is 12-16 kilowatts.

2. Advantages of inverter welding machine:

1. Small size, light weight, saving manufacturing materials, easy to carry and move.

2. The basic feature of arc welding inverter is that it has a high working frequency, which brings many advantages. This is because the transformer, whether it is the primary winding or the secondary winding, has the following relationship between the potential e and the frequency f of the current, the magnetic flux density b, the cross-sectional area of the core s and the turns w of the winding

e = while the terminal voltage u of the winding is approximately equal to e, i.e. .

U e = When U and B are determined, if F is increased, S decreases the bridge and W decreases, so the weight and volume of the transformer can be greatly reduced.

3. Because the inverter frequency in the inverter welding and cutting equipment is much higher than the power frequency (300 2000 times that of the power frequency), the volume and weight of the transformer will be greatly reduced.

4. In the same way, the working frequency is greatly increased, and the volume and weight of the reactor will also be greatly reduced.

5. The volume and weight of transformers and reactors are greatly reduced, so that the volume and weight of the inverter welding and cutting equipment itself are greatly reduced, and the weight is only 1 10 1 5 of the traditional welding machine, which is convenient for production, transportation and use, and can save a lot of metal materials (mainly copper, silicon steel sheets, aluminum, etc.) in the manufacture of welding and cutting equipment.

6. The volume and weight of the transformer and reactor of the inverter welding and cutting equipment are greatly reduced, and the corresponding power loss (mainly the core magnetic loss and wire energy consumption) is also greatly reduced, and its effective power output can reach 82% 93%.

7. The effective power output of traditional welding and cutting equipment is only 40% 60%, which is a serious waste of power resources.

First, the external dimensions are different.

1. ZX7-200T: dimensions (mm) length, width and height 375 155 232.

2. ZX7-200: dimensions (mm) length, width and height 395 153 301.

Second, the duty cycle output.

1. ZX7-200T: 40 60% duty cycle output (A V) 145 Duty cycle output (A V) 130.

2. ZX7-200: 40 60% duty cycle output (A V)200 Duty cycle output (A V) 155.

3. The range of current and voltage regulation is different.

1. ZX7-200T: current and voltage adjustment range (A V) 40

2. ZX7-200: The current and voltage regulation range is (A V)29.