chad High efficiency switch welding machine

High-efficiency switch welding machine (integrated machine) is designed for straight seam induction welding of steel pipes. It mainly uses IFP460(MOSFET) and DSEI60-06A (fast recovery diode), rectifier diode, high-power IGBT and other power devices to form modular power components. The high-power capacitor group C and the inductor coil L constitute a current-type parallel boost resonant circuit. This circuit is suitable for high-frequency welded pipes with low load impedance and does not require an output transformer, which not only improves efficiency, but also increases the reliability of the whole machine.

 

High efficiency switch welding machine (integrated machine) is designed for straight seam induction (contact) welding of steel pipes. It mainly uses IRFP460(MOSFET) and DSEI60-06A (fast recovery diode), rectifier diode, high-power IGBT and other power devices to form modular power components. The high-power capacitor group C and the inductor coil L constitute a current-type parallel boost resonant circuit. This circuit is suitable for high-frequency welded pipes with low load impedance and does not require an output transformer, which not only improves efficiency, but also increases the reliability of the whole machine.

The high-efficiency switch welding machine (all-in-one machine) has the obvious characteristics of remarkable energy saving effect, good weld quality, small size, convenient maintenance, low failure rate and low maintenance cost.

When installing the equipment, it is only necessary to connect the main circuit cable of the three-phase power supply and the high-efficiency switch welding machine (all-in-one machine). The three-phase power supply and high-efficiency switch welding machine (integrated machine) are connected with less than ten wires. The connection between the high-efficiency switch welding machine (all-in-one machine) and the operating table is also very few. In the case of good cooperation with the user site, the installation of the whole power supply can be completed in two days.

 

In the past, high-frequency welding machines often have device damage and protection at the same time. The new generation of high-efficiency switch welding machine (integrated machine) adopts the design concept of prevention. Under the premise of ensuring performance, simplify the circuit structure, carefully select the design parameters, good process layout, ensure the stability and reliability of the power supply, and set up a more complete fault alarm and display system, so that once the system fails, the maintenance personnel can quickly Find the cause and location of the fault. The new generation of high-efficiency switch welding machine (integrated machine) is provided with the following protection measures.

 

The three-phase AC power supply changes AC into DC through a full-bridge rectifier circuit, and a number of well-matched filter networks are set on the line, so that the high-efficiency switch welding machine (integrated machine) has few harmonic components during operation. The power factor can reach more than 0.96.

 

A new generation of high-efficiency switch welding machine (integrated machine) adopts low-voltage and high-current resonant technology to obtain a suitable output voltage on the inductor. The ignition between the sensor and the steel pipe is avoided, and the stability of the equipment is increased.

Since the ZVS technology realizes switching when the drain-source voltage of the MOS transistor is zero, the charge stored in the inter-electrode capacitor has been discharged with the resonant circuit, so the switching loss can be reduced to zero. However, ZCS technology cannot achieve zero switching loss. The power supply adopts advanced zero voltage switching (ZVS) technology, which makes the switching loss of power devices almost completely eliminated at high frequency. The efficiency of the whole machine can reach more than 80% under the best adjustment of the sensor and the unit.

 

Thanks to IGBT and fast recovery diode replacing SCR, the output of the new generation of high-efficiency switch welding machine (all-in-one machine) is stable, the weld is a bright line during welding, there is no large amount of spark splash, and the quality of the corresponding weld has made a qualitative leap. The inner weld is basically a straight line, which is also the main reason for the high-precision welded pipe widely used high-efficiency switch welding machine (integrated machine).

 

High efficiency switch welding machine (all-in-one machine)	solid state high frequency
High efficiency than solid high frequency power saving 15%-25%	relatively high efficiency
Single cabinet design, easy installation.	Multi-cabinet design, more connections between cabinets
High power factor, up to 0.96. No compensation cabinet required	Low power factor, need compensation cabinet
The output is stable and the weld quality is better.	The weld quality is relatively good.
Full modular design, simple maintenance.	Semi-modular design, maintenance is relatively complex.

 

1) The equipment requires indoor installation, good grounding, the color of the grounding wire must be significantly different from the color of the control line, and the grounding resistance is less than 4Ω.

2) The altitude should not exceed 1000 meters, otherwise the rated value should be lowered.

3) The ambient temperature shall not exceed 40 ℃ at the highest and -10 ℃ at the lowest.

4) The relative temperature of the air is not more than 85%.

5) The installation inclination is not more than 5 degrees.

6) No violent vibration, no conductive dust, no corrosive gases and explosive gases.

7) Installed in well-ventilated occasions