Whether in the fields of machinery or technology, China is achieving perfect improvement and rapid development. Therefore, various types of machines have undergone multiple improvements and further updates to make them more intelligent and efficient. The medium frequency spot welding machine not only ensures quality and efficiency, but also ensures environmental impact, becoming an excellent machine with minimal pollution. Below, I will explain the characteristics of intermediate frequency spot welding machines and their differences from power frequency AC welding machines.
1、 Characteristics of medium frequency spot welding machine
1. The power factor of the intermediate frequency spot welding machine is relatively high, reaching up to 95%. This not only reduces the power requirements of the power supply system, but also minimizes the secondary losses in the circuit
2. The intermediate frequency spot welding machine has great stability and is an extremely advanced resistance welding product internationally. Its inverter frequency can reach 1000Hz, and the precision that can be controlled is 20 times that of traditional spot welding machines,
3. Mid frequency spot welding machines can save energy and reduce emissions, especially by reducing significant power consumption. They are excellent energy-saving and emission reducing machines strongly advocated by the country.
4. The intermediate frequency spot welding machine is very convenient to operate and has high efficiency. Its quality and volume are 1/3 of that of an AC voltage transformer
5. Using digital mode to control operation can fully improve the current control speed and measurement accuracy during welding.
2、 The difference between intermediate frequency spot welding machine and power frequency AC welding machine
1. Comparison of energy-saving effects
The intermediate frequency point convex welding machine has a great energy-saving effect, high efficiency, and low loss. It also outputs direct current and improves power, making the energy-saving effect significant. The transformer of the power frequency AC spot welding machine has high losses and low welding power, resulting in more circuit loss resources. The impact on the environment is not as significant as that of mid frequency spot welding machines.
2. Comparison of Heating Rates
The current of the power frequency AC welding machine is zero, which affects the heating time and makes the heating time longer. On the other hand, the medium frequency inverter spot welding machine outputs direct current, and the total heat is relatively more concentrated, resulting in a shorter heating time.
3. Comparison of welding quality
Due to the zero crossing of the current, the adjustment cycle of the thermal efficiency of the power frequency AC welding machine is relatively long. When the current percentage is small, the welding time resolution is small, while the adjustment resolution of the inverter DC spot welding machine can reach 0.25ms. If the zero crossing time becomes longer, the thermal efficiency will be higher under the action of the return inductance, and the welding heat input will be more stable under DC power output.
4. Comparison of equipment
The transformer of the mid frequency spot welding machine is relatively small and the equipment is relatively light and small. The transformer iron core of the power frequency AC welding machine is relatively large, and the equipment is also relatively bulky.
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