What is duty expectancy? What is the duty cycle of our commonly used welders?

The duty cycle rate, also known as the load duration rate, refers to the ratio of the equipment to work at full load, and the rated load duration rate refers to the rated voltage of the equipment.

Rated current or rated power.

The ratio of the working time under load.

The national standard stipulates that the rated load duration rate of manual welding is 60%, and the automatic or semi-automatic is 60% and 100%.

A small electric welding machine for household use.

Although the nominal capacity is 10kva, the duty cycle is 25%, which means that the welding machine can only work at 25% of the time under the load of 10kva; That is, you can only work for 100 minutes in 25 minutes, otherwise you will overheat and burn out;

The nominal capacity of the industrial large-scale welding machine is 10kva and the duty cycle is 100%, which means that the welding machine can work continuously for a long time under the load of 10kva.

There is also an explanation: the load of the welding machine is not fixed, the welding current is large, the load is large, and the welding current is small, the load is small;

On the other hand, if a small welding machine can work continuously at 25% load.

The requirement is 60%. Most welding machines are higher than this, and the nameplate of the machine is false.

That is, during the 10 minutes of maximum current welding, at least 6 minutes will work normally. The remaining 4 minutes are protected by overheating, and there is no output.

Some welding machines account for 100% of the load, which can be continuously welded without overheating protection.

Hello dear <>

The current carrying capacity and power factor of the welding machine determine the rated capacity of the welding machine, and the capacity of the welding machine is used in kilowatts kW The temporary no-load rate refers to the ratio of the instantaneous capacity of the welding machine to the rated capacity under the condition that the current and voltage of the welding machine are constantly changing during the welding process, and the duty cycle is usually 100%. The calculation capacity of the equipment needs to consider the following factors: the type and thickness of welding materials, welding methods (manual welding, automatic welding), welding working time and welding frequency, external ambient temperature and ventilation conditions, so the maximum welding capacity should be considered when choosing the capacity of the welding machine, and avoid using it under high loads. then the maximum load should be. However, in practice, it is often necessary to take into account other factors, such as welding time, ambient temperature, etc., so there is a need to leave room when choosing equipment, and it is recommended to choose a pro-<> with a larger capacity than the actual demand

The duty cycle of the welding machine refers to the proportion of the time that the welding machine can work continuously in a unit of time to the total working time. For example, if a welder has a duty cycle of 60%, it will be able to work continuously for 36 minutes per hour, and the remaining 24 minutes will need to be rested and cooled. The calculated capacity of the equipment refers to the energy capacity required by the equipment that needs to be determined by taking into account factors such as the operating time of the equipment, the power of the equipment, the load factor, and the peak power distribution early draft flow.

This ensures that the equipment is functioning properly and does not fail due to energy issues. Specific to the welding machine, assuming that its power is kilowatts and the duty cycle is 60%, then it can work continuously in kilowatts per hour, and the rest of the kilowatts need to be cooled. When considering the calculation capacity of the equipment, it is necessary to consider the time, frequency, load factor and safety factors from opening the code to welding.

For example, if each welding job takes 30 minutes and 15 welding jobs are performed per day, then the daily working time of the welder is hours. If the welder has a duty cycle of 60%, then it will be able to work continuously for many hours per day (i.e. 60% hours). Therefore, the device computing capacity should be at least an hour kW = kWh.

In addition, load factors and safety factors need to be taken into account, and the specific calculation of capacity should be adjusted according to the actual situation.

Summary. Hello dear and happy to serve you: the duty cycle of the welding machine is 25%, and the calculated capacity of the equipment is.

Hello dear dear, I am happy to serve you: the temporary load inspection and closure rate of the welding machine is 25%, and the computing capacity of the equipment is not carried out.

Welding machine refers to the electrical appliances that provide certain characteristics for welding, welding due to the advantages of flexibility, simplicity, convenience, firmness and reliability, welding and even the same strength as the base metal, widely used in various industrial fields, such as aerospace, ships, automobiles, containers, etc. The main component of the welding machine is a step-down transformer, and the two ends of the secondary coil are the welded workpiece and the welding rod, which ignites the arc during work, and welds the welding rod into the gap of the workpiece in the high temperature of the arc. Because the core of the electric welding transformer has its own characteristics, it has the characteristic of a sharp drop in voltage, that is, the voltage drops after the electrode is ignited; When the electrode is adhered to a short circuit, the electro-filial piety pressure drops sharply.

Isn't the same algorithm for electric motors?

4kw air compressor.

The same is true for air compressor motors.

How to calculate. The equipment capacity of the electric welding machine and the electric welding device refers to the equipment capacity of the electric welding machine and the electric welding device, which refers to the rated power (kw) when the duty cycle = 100% is uniformly converted, if it is not envied and equal to 100%, it should be converted, and the formula is brother judgment: pe = e · The equipment capacity of the COSQN electric furnace transformer refers to the rated power (kw) at the rated power factor, that is, PE = SN · COSQN

Load persistence rate, also known as duty cycle, refers to the ratio of the working time of the arc welding power supply to the cycle time. The full cycle time, or the work cycle, includes the load duration and rest time. In the national standard, the cycle is 5min, 10min, 20min and continuous.

The national standard stipulates that the rated negative load imitation no-load continuous rate of manual welding is 60%, and the automatic or semi-automatic is 60% and 100%. For example, the rated current of the 500kr2 welding machine is 500A when the rated load is 60%, and the maximum welding current is 387A when the actual load duration is 100% (automatic welding).

Although the household small welding machine also has a nominal capacity of 10kva, it also indicates a duty cycle of 25%, which means that this welding machine can only work 25% of the time under a load of 10kva; That is to say, you can only work for 25 minutes in 100 minutes, otherwise you will overheat and burn out; The nominal capacity of the industrial large-scale source welding machine is 10kva and the duty cycle is 100%, which means that the welding machine can work continuously for a long time under the load of 10kva in the state of Charu.

In a working process, the ratio of welding time to total time is called the duty cycle of the welding machine. Agitation for example:

After closing, after every 15 seconds of welding, pause for 20 seconds, weld for another 15 seconds, and pause for another 20 seconds. Its actual duty cycle is:

If the actual duty cycle exceeds the specified duty rate of the welding machine, it is necessary to reduce the use of the power and the use of the lap rate.