PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
C-18 Application Notes
The adaptive speed regulator is enabled with parameter 181 [Adaptive Spd
En] = “1 Enabled”. Normally the gain depends on the speed of the drive. It
can, however, vary according to a variable defined in parameter 183 [Adap
Ref]. The type of regulation used is selected in parameter 182 [Adaptive
Reg Typ]; 0 = “Speed”, or 1 = “Adaptive Ref”.
Parameters 184 [Adaptive Spd 1] and 185 [Adaptive Spd 2] are used to
define the three ranges that may have different gains. A parameter set can be
defined for each of these ranges, with each set containing an individually
definable P and I component (i.e., Pars 188 [Adaptive P Gain1] and 189
[Adaptive I Gain1], 190 [Adaptive P Gain2] and 191 [Adaptive I Gain2],
and 192 [Adaptive P Gain3] and 193 [Adaptive I Gain3]). When the
adaptive speed regulator is enabled, the first set of parameters is active until
the speed specified in Par 184 [Adaptive Spd 1] or Par 183 [Adap Ref] is
reached.
Parameters 186 [Adaptive Joint 1] and 187 [Adaptive Joint 2] ensure a
smooth transition between the different parameter sets. The fields must be
defined so that [Adaptive Joint 1] and [Adaptive Joint 2] do not overlap.
When the adaptive speed regulator is enabled, parameters 87 [Spd Reg Kp]
and [Spd Reg Ki] parameters have no effect on the speed regulator. They do,
however, retain their value and are active when the adaptive speed regulator
is disabled.
Configuring the Adaptive Speed Regulator
• Set Par 181 [Adaptive Spd En] = “1 Enabled”
• If the gain must be changed on the basis of units other than the drive’s
speed reference, set Par 182 [Adaptive Reg Typ] = 1 “Adaptive Ref”. The
adaptive reference is provided to the drive as an analog value via an
analog input. For this reason Par 183 [Adaptive Ref] must be assigned to
an analog input. The other possibility is to enter the value of Par 183
[Adaptive Ref] via the HIM. In this case the an analog input is not
necessary.
• Enter the appropriate values in Par 184 [Adaptive Spd 1] and Par 185
[Adaptive Spd 2] to define the three speed ranges. Values are expressed
as a percentage of Par 45 [Max Ref Speed] and the maximum value of
Par 183 [Adaptive Ref].
• When Par 182 [Adaptive Reg Typ] = 0 “Speed”, tuning is completed via
Fine Tuning the Regulators on page C-25
. In this case the following
points must be taken into consideration:
❏ The value entered in Par 61 [TstGen Offset] must be at the low end
of the speed range to be tuned, but is also outside the range set in
Par [Adaptive Joint x].
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