General Remarks; Principle Of The Tp 1500 - Fronius TransPocket 1500 Instructions De Service

General remarks

Principle of the
TP 1500
Fig.1
In the further development work done on the inverter principle in the direction of a
resonance inverter for the TP 1500 power source, wholly new approaches have been
taken. Instead of a simple transistor switch or pulse-width modulation, the principle of a
resonance converter is used for generating the high-frequency primary voltage.
In spite of the complicated controlling system needed for use in welding, the resonance
converter principle offers a number of useful advantages:
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An electronic controller adjusts the power-source characteristic to the electrode that is
to be welded. When cellulose (CEL) electrodes are used, a special operating mode can
be selected for this, ensuring perfect welding results.
Its range of use and application is considerably extended by the facility for TIG welding
with touch-down ignition.
TransPocket 1500 welding unit
The resonance structure makes it possible to achieve a nearly "ideal output characte-
ristic"
Reduced switching losses permit higher switching frequencies yet with optimum
efficiency
Superb ignition and welding properties, yet lowest possible weight and very compact
dimensions
The TP 1500 power source is a further
member of the new generation of welding
rectifiers. High-performance electronics
have helped create a truly unique rectifier
that weighs in at a mere 4.7 kg.
The TP 1500 works on the principle of the
resonance inverter. The voltage from the
mains is first rectified. The resulting DC
voltage is then inverted, at a frequency of
up to 150 kHz. The welding transformer
then creates the required operating
voltage, which is rectified and delivered to
the output sockets.
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