Sturt Technology teaches you to distinguish between AC spot welding machine and DC spot welding machine

spot welding machine according to the current classification can be divided into dc and ac. Many people do not know the distinction between DC spot welding machine and AC spot welding machine. Do you want to know how to distinguish? Shenzhen spot welding machine Xiaobian teaches you to distinguish from four aspects:

, spot welding machine welding quality

AC spot welding machine has a long adjustment period, and for 50Hz power grid, the welding time adjustment resolution is 20ms. The time adjustment resolution of inverter DC spot welding machine can reach 0.25ms(4kHz inverter frequency), and the control accuracy is high. The response speed of the feedback control of the inverter spot welding machine is obviously accelerated and the output stability is good.

AC spot welding machine has low thermal efficiency due to the influence of excessive current. Use thyristors to adjust the current. When the current percentage is small, the zero-crossing time is long, and the impact is greater. The output current of DC spot welding machine is pulsating DC, and it is continuous DC output under the action of loop inductance, with high thermal efficiency and stable welding heat input.

2. Welding speed of spot welding machine

AC spot welding machine has a relatively long heating time due to the influence of current zero crossing. The inverter resistance spot welding machine is DC output, heating is concentrated, and the welding time is shortened.

3, spot welding machine energy saving effect

AC spot welding machine works at 50Hz, transformer loss is large, welding machine power factor is low, loop loss is large. The inverter welding machine transformer works at a higher frequency (1-4kHz), the loss is small, the DC output improves the power factor, and the energy saving effect is obvious.

4, Volume and Weight of Spot Welding Machine Equipment

The transformer core of the AC spot welding machine is relatively large, and the equipment is relatively heavy under the same power condition. The transformer of DC resistance spot welding machine is greatly reduced, and the equipment is lighter.

Shenzhen Sester Technology Co., Ltd. is a high-tech production enterprise integrating R & D, production and sales of automatic welding equipment and power battery PACK line equipment. The company has the self-made R & D capability of independent R & D of new products, strong technical development force, and professional technical engineering team to provide customers with timely and perfect pre-sales and after-sales service.