Siemens PERFECT HARMONY GENIII/E Series - Page 77

Perfect Harmony GENIII/e User’s Manual The Keypad and Display Interface
A1A19000405A: Version 1.3 3-41
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Table 3-29: Stator Resistance Estimator Menu (3300)
Table 3-30: Braking Menu (3350)
Parameter ID Units Default Min Max Description
Stator resistance est 3310 Off
This parameter enables or disables
the stator resistance estimator
function.
•Off
•On
Stator resis filter gain 3320 0.0 0.0 1.0
Stator resistance estimator filter
gain.
Stator resis integ gain 3330 0.002 0.0 1.0
Stator resistance estimator integral
gain.
Parameter ID Units Default Min Max Description
Enable braking 3360 Off
Enable or disable dual frequency
braking (DFB). User must be aware
of torque pulsations and motor
heating produced with this method.
Pulsation
frequency
3370 Hz 275.0 100.0 5000.0
Torque pulsation frequency when
dual-frequency braking is enabled.
Adjust for a different torque
pulsation frequency. The control
always recalculates the desired
value due to limited resolution.
Brake power loss 3390 % 0.25 0.0 50.0
Amount of high frequency losses at
the onset of braking.
VD Loss 3400 0.25 0.0 0.5
Max amplitude of the loss inducing
voltage. Use this to adjust the
braking torque.
Braking
constant
3410 1.05 0.0 10.0
Ratio of motor (induced) losses to
power absorbed from load. This
parameter should always be set
to a value greater than 1.0.
*
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.