Sorvall RT/T6000D - Page 122

SORVALL®
Centrifuges
System
Descriptions:
Electrical
Figure
6-17. Main
Speed
Pulse
Width
Modulation
Circuit
SelRun
Speed
Potenliomeler
(Front Panel)
Figure
6-18.
Anticipation
Component
Voltage Equivalent
offset is
directly proportional
to
the
difference
between
the
actual
rpm
voltage
and the
set
run
speed voltage.
As
the
motor
approaches
the
desired set
speed,
the
anticipation
voltage
offset
decreases
towards
approximately
0
Vdc.
This
anticipation
circuit
becomes
nonoperational
when
the
rotor reaches set
run speed
because
it
is
providing only
0 Vdc
offset
to
the
actual
rpm
voltage.
6-23