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Vacuum Tube Welders – Variable Frequency

Variable output frequency is a strategic choice when welding stainless steel tubes or pipes with a severe range of wall thickness and OD.

Variable output frequency is a strategic choice when welding stainless steel tubes or pipes with a severe range of wall thickness and OD. The adaptive circuit solution is able to guarantee the constant available reactive nominal power, independently from the working frequency value selected. The ideal load matching capability is auto-tuned independently from the selected frequency value. A dedicated PLC software adapts the inductance and capacitance in respect to the operator’s frequency selection.

 

 

Vacuum Tube Welders – Variable Frequency

Robust

Precise

Easy Manteinance

MACHINE FEATURES

  • Class C oscillator grounded grid solution
  • Oscillator tube MTBF 35.000 to 50.000 working hours
  • Short-circuit proof Welder efficiency 70%
  • Same coils as the Mosweld Welder
  • Easy adaptation of any load features
  • Strong response in limit conditions
  • Around 50 years of experience in vacuum tube welders

Continuous output power

100 - 600 kW

Power regulation range

0 - 100%

Frequency range ratio

1:1,3 or 1:2 (see below)

Voltage supply

On demand

Output Stabilization

By Thyristor Control automatic voltage regulator: ± 1% at Net variation ± 10%

Residual Ripple

Less than 1% at any power output

Cooling Method

Water to water by Stainless Steel heat exchanger

Max. Industrial Water Temperature

27°C

Standard Color

Light grey RAL 7035

Frequency Range

1:1,3 (i.e. 160 - 210 kHz) for austenitic stainless steel only

Frequency Range 2

1:2 (i.e. 150 - 300 kHz) for both austenitic and ferritic stee

Advantages

  • Management of the heat affected zone versus material OD and thickness ratio.
  • Improved quality of external and internal welding beads with relevant benefits for inner and outer scarfing tools.
  • Improved welding quality for finite tube mechanical operation.
  • An active control of spume effects, typical of non ferrous material welding process.
  • Possibility to weld galvanized magnetic products.
  • Welding of ferritic and austenitic stainless steel family on the same tube mill.
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Variable Frequency Vacuum Tube Welders

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