high frequency induction pipe welding equipment is a high-tech equipment which developed by our engineers.The main performance index of our tube welding machines is in the leading position at home.Solid State hf welder mainly consists of three parts: transformer, rectifying cabinet and inverter cabinet.

Our high frequency induction pipe welding equipment  and its rectifier and inverter controlled by microcomputer, and equipped with other peripheral devices. All control elements are integrated in two electronic circuit boards(each for rectifier and inverter). We realizes the optimum adjustment of rectifier and inverter on the basis of powerful function of computer software and hardware. We can produce all kinds of solid state HF welding machine from 60KW to 800KW.

Main advantages of high frequency induction pipe welding equipment :

1.No high voltage, safety and high efficiency

2.Using high-power MOSFET

3.Good pipe welding quality, welding width and heat evenly,less burrs

4.Power range from 0 to 100% adjustable steplessly

5.Using pulse width modulation or voltage regulation circuit microcomputer control based, adjustment stable with high precision, small harmonic interference

6.It has fault protection system with over-voltage, over-current,lack phase and less water-pressure etc.

7.Control circuit has a soft start and soft stop function, it will not has the impact to the electric network.

8.Digital display of operating mode and easy maintenance.

Brief Introduction for each part of  high frequency induction pipe welding equipment

Solid state HF welding machine is specially designed for straight seam welding. It adopts high power components of US IR MOSFET and Germany IXYS company rapid recovery diode.The high power capacitor C and inductor coil L compose current-mode parallel upper-voltage resonance circuit,which doesn't need output transformer. Thus, it not only improves the efficiency, but also increase the reliability of the welder.The solid state HF welder has such distinct features as energy-saving,effective welding,simple structure, easy maintenance, low failure rate,low maintenance cost etc.

1). rectifying cabinet

As for solid state high frequency welder, the rectifying cabinet uses high power thyristor rectifier,and some harmonic absorption and LC resonant filter components are designed at the same time to reach the goal of reducing the equipment output voltage pulse and increase ripple coefficient index. The ripple coefficient of the whole equipment output is less than 5% to ensure the welding quality and avoid the disturbance of harmonic wave component to power grid simultaneously.

2). inverter output cabinet

Offering high frequency power supply to steel pipe/tube welding, IRFP460 and the quick recovering diode DSEI60-06P of American IR corporation and Germany IXYS corporation are used to form electricity converter as the main power device. The single layer power module output power is more than 50KW. The same power modules have the feature of interchangeability.

3). central control console

Indicate the output current and voltage of the DC power unit; armature voltage and current, The pipe line can be completely controlled by the central control unit.It achieve remote manipulation and power regulation of solid state high-frequency welder.

4). isolating transformer 

Isolation step down transformer adopts oil-immersed type transformer, and reduces the input voltage from alternating voltage 380V to about 200V to supply the rectifying cabinet, at the same time, this transformer reduces harmonic wave interference of electric network and increase the power factor of the solid-state high frequency welder.

5). air-water cooler

Circulating cooling system for soft water  has completed its cooling to the warming section of rectifying cabinet and output inverter cabinet, using air-water heat exchanger and internal circulation adopts distilled water,with the function of temperature self-control and display. This system have the features of complete protection and with no need to additionally build cooling tower and circular pool.

6).water-water cooler

Circulating cooling system for soft water  has completed its cooling to the warming section of rectifying cabinet and output inverter cabinet, using air-water heat exchanger and outer water (normal) cools down the inner water (distilled water), with the function of temperature self-control and display. This system have the features of complete protection and with additionally build cooling tower and circular pool.

7). DC speed adjust unit (water cooling)

DC Drive cabinet for Steel pipe welding machine with speed - current double closed-loop control, with a wide speed range, good dynamic performance, the advantages of multi-motor linkage