Electrical Connections
6-5
Digital Compact
2002 BRANSON Ultrasonics Digital Compact Version 22.08.2002
6.2.1 Notes on Overload Alarm
The power supply module Digital Compact is protected against over-
voltage, overcurrent and excessive phase displacement. These conditi-
ons possibly have the following reasons:
• Real overload conditions, due to an amplitude too high, a force
too high being exerted onto the workpieces or exceeding the
maximum power of the module.
• Problems related to the tool, e. g. uncontrolled increase in
temperature in the acoustic stack resulting in excessive
displacement of the resonant frequency which makes normal
operation impossible. Malfunctions or cracks in horn, booster or
converter have the same effects.
• Electronic problems, e. g. caused by a malfunction of the power
supply module which might result in overload alarm.
6.2.2 Amplitude Regulation
• Line voltage variations
The amplitude control provides compensation for line voltage
variations via a closed loop in which the output voltage is measured
and compared to the reference value. If necessary, the output
voltage is corrected.
• Load variations
If high pressure is applied during welding the amplitude might be
reduced. A special circuit compensates for these variations by
causing the amplitude to track load variations.
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