Siemens PERFECT HARMONY GENIII/E Series User Manual page 77

Perfect Harmony GENIII/e User's Manual
Parameter
Stator resistance est 3310
Stator resis filter gain 3320
Stator resis integ gain 3330
Parameter
Enable braking 3360
Pulsation
3370
frequency
Brake power loss 3390
VD Loss 3400
Braking
3410
constant
Note: The need for braking capacity is addressed through a feature known as dual frequency braking.
This feature essentially creates a braking function by means of injecting a counter-rotating flux vector at
well beyond the slip of the machine. This generates additional losses in the motor. The injection
frequency is adjustable via a menu setting to allow critical frequencies (i.e. mechanical resonances) to be
avoided.
A1A19000405A: Version 1.3
Table 3-29: Stator Resistance Estimator Menu (3300)
ID Units Default
Off
0.0
0.002
Table 3-30: Braking Menu (3350)
ID Units Default
Off
Hz 275.0
% 0.25
0.25
1.05
s s s s
The Keypad and Display Interface
Min Max
This parameter enables or disables
the stator resistance estimator
function.
•
•
Stator resistance estimator filter
0.0 1.0
gain.
Stator resistance estimator integral
0.0 1.0
gain.
Min Max
Enable or disable dual frequency
braking (DFB). User must be aware
of torque pulsations and motor
heating produced with this method.
Torque pulsation frequency when
dual-frequency braking is enabled.
Adjust for a different torque
100.0 5000.0
pulsation frequency. The control
always recalculates the desired
value due to limited resolution.
Amount of high frequency losses at
0.0 50.0
the onset of braking.
Max amplitude of the loss inducing
0.0 0.5 voltage. Use this to adjust the
braking torque.
Ratio of motor (induced) losses to
power absorbed from load. This
0.0 10.0
parameter should always be set
to a value greater than 1.0.
Description
Off
On
Description
3-41
3