The Hi-range vibrators are designed for tests of large
and heavy specimens at high levels of acceleration for product qualification,
reliability, acceptance and production stress screening applications.
The mirror imaged magnetic structure provides extreme concentrated flux in the
force generating area and keeps stray field minimum at the top of armature. The
system incorporates linear bearing which restrain and guide the body motion in
the trust axis.
The low natural frequency of this body suspension system virtually eliminates
the need for large reaction masses for most applications.90o rotation of the
Vibrator body is facilitated on the Trunion assembly to integrate with the slip
table. The pneumatic isolation system suspends the body on air springs located
on trunions.
Force is measured in peak value for Sine operation and in RMS for Random
operation on payload equal to twice of armature mass. Frequency range of
operation is controlled when operating from the Digital Vibration Controller.
Vibrator’s armature is of cast magnesium alloy with a web like structure
when looking from inside.
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The Hi rating power modules are designed upon multilayerd power
flow technology to drive Hi-range electromagnetic Vibrators. The Amplifiers
feature an integrated field power supply and the microelectronics based
interlocks are displayed on user friendly interactive front soft-touch
alphanumeric display panel.
The amplifier has synchronised loss protection facility to have a smooth
shut-down in the event of power failure and has event management system based
upon microprocessor user interface which also looks after the fault diagnosis
of the complete system.
Self contained rack compatible power modules are stacked over each other, use
independent cooling fans and deliver greater than 90% efficiency with
capability to handle peak current in Random operations.
The power to energise Vibrator electromagnet i.e. the field power designed with
solid state electronics is generated in the main amplifier rack console itself
for easy handling and vibrator interface.
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Amplifier’s direct coupled design
with LC filters inside the rack console take care of the non linear behavior of
armature in the full frequency band, eliminating the maintenance & safety
hassles of matching output transformer design.
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Stress Screening
Stress Screening