A-30
Application Manual CDA3000
Appendix C Glossary
Smoothing A driving profile with linear ramps is smoothed by
sinusoidal speed ramps. This produces an s-shaped
speed profile which results in bucking limitation with
increased acceleration and deceleration time. The
difference in time between the linear ramp and the
sinusoidal ramp is termed the smoothing time
JTIME.
Smoothness Measure for the smooth running of a motor.
Speed control
range, speed
manipulating
range
Ratio of maximum speed (usually rated speed) and
minimum speed at which the drive is run stationary.
Braking and acceleration processes are not taken
into account.
Speed manipulat-
ing range
Range in which the motor can always deliver nomi-
nal torque M
N
.
Standstill torque Momentum built up by the motor from feed via the
inverter module in order to counteract a load-
dependent rotation of the rotor from its current posi-
tion.
Static speed
accuracy
Speed deviation in the steady (static) state after
completion of startup. In operation with speed con-
trol a high-frequency ripple is superimposed on the
actual speed.
Subject area Parameters assembled into parameter groups
based on function orientation.
Synchronous
motor
Motor with permanent magnet excited rotor which
requires no slip to the field speed n
F
of the stator in
order to build up an electromagnetic force. The field
speed of the stator and the rotor speed rotate syn-
chronously.
Table-supported
ramp generator
The frequency reference drawn from a table; is
attained with the assigned acceleration or decelera-
tion ramp of the driving set. The necessary ramps
are set in the table-supported ramp generator.
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