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component:
1. One rectifier cabinet, 2. One inverter cabinet, 3. One DC Driver, 4. One operating console, 5. One step-down transformer, 6. One set of single cooling air conditioning, 7. One set of cooling system.
Equipment Introduction:
A three-phase full bridge rectifier circuit composed of six thyristors is stable and reliable. This technology is widely used in the welding of steel pipes and aluminum bars in most existing solid-state high-frequency systems in China. But there are also drawbacks such as low power factor and heavy harmonic pollution. To ensure that the device has the minimum harmonics, the highest power factor, and adjustable output power, we have developed PWM switching power supply voltage regulation technology. The working principle is briefly described as follows:
Firstly, the three-phase AC power is converted into DC through a three-phase uncontrolled bridge rectifier bridge composed of diodes, and a flat DC voltage is generated through filtering by a large capacitor bank. Then, a high-power switching module IGBT is used to control its on/off. With the switching frequency unchanged, the average output DC voltage can be controlled by adjusting the ratio of on/off time. This is pulse width modulation technology (PWM or chopping technology for short). PWM chopping modulation generates variable width pulse DC electricity, which can provide fast response, stable, and adjustable DC voltage and current to the load through reactance or capacitor filtering.
Applicable scope:
Mainly used for welding various types of straight seam steel pipes such as low-carbon steel, high-strength steel, and alloy steel.
Equipment features:
1. High power factor: Power factor ≥ 0.92, no need to add reactive power compensation equipment.
2. Low harmonic pollution: Generally, there is no need to add additional harmonic treatment equipment.
3. Stable output power: The output ripple is ≤ 0.2%, and the burrs on the welded pipe are more uniform.
4. Fast protection speed: Fault interlocking protection time ≤ 10 μ S. The equipment is more reliable.
5. High power efficiency: Due to the reduction of reactive power loss, the overall efficiency of the machine has been improved.
Scope of supply:
