Parameters 14-** Special Functions - Danfoss VLT AQUA Drive FC 200 Programming Manual

Parameter Description

3.13 Parameters 14-** Special Functions

3.13.1 14-0* Inverter Switching
14-00 Switching Pattern
Option: Function:
Select the switching pattern: 60° AVM or SFAVM.
[0] 60 AVM
[1] SFAVM
14-01 Switching Frequency
Option: Function:
Select the inverter switching frequency. Changing
the switching frequency can help to reduce
acoustic noise from the motor.
NOTICE!
The output frequency value of the
adjustable frequency drive must never
exceed 1/10 of the switching frequency.
When the motor is running, adjust the
switching frequency in 14-01 Switching
Frequency until the motor is as noiseless as
possible. See also 14-00 Switching Pattern
and the section Derating.
[0] 1.0 kHz
[1] 1.5 kHz
[2] 2.0 kHz
[3] 2.5 kHz
[4] 3.0 kHz
[5] 3.5 kHz
[6] 4.0 kHz
[7] 5.0 kHz
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0 kHz
[13] 14.0 kHz
[14] 16.0 kHz
14-03 Overmodulation
Option: Function:
[0] Off Selects no overmodulation of the output voltage in
order to avoid torque ripple on the motor shaft.
[1] On The overmodulation function generates an extra voltage
of up-to 8% of U output voltage without overmodu-
max
lation, which results in an extra torque of 10-12% in the
middle of the over-synchronous range (from 0% at
nominal speed rising to approximately 12% at double
nominal speed).
®
VLT AQUA Drive Programming Guide
NOTICE!
Enabling overmodulation can cause vibrations that may
destroy the mechanics if running in field weakening areas
(from 47 Hz).
14-04 PWM Random
Option: Function:
[0] Off No change of the acoustic motor switching noise.
[1] On Transforms the acoustic motor switching noise from a
3.13.2 14-1* >Mains Power On/Off
Parameters for configuring line failure monitoring and
handling.
14-10 Mains Failure
Option:
[0] No function The energy left in the capacitor bank will be
[1] Ctrl. ramp-
[3] Coasting
[4] Kinetic
[6] Ctrl. alarm
®
MG20O622 - VLT is a registered Danfoss trademark
clear ringing tone to a less noticeable 'white' noise. This
is achieved by slightly and randomly altering the
synchronism of the pulse width modulated output
phases.
Function:
Select the function at which the adjustable
frequency drive must act when the threshold
set in 14-11 Mains Voltage at Mains Fault has
been reached or a Mains Failure Inverse
command is activated via one of the digital
inputs (parameter group 5-1*).
Only selection [0] No function, [3] Coasting or
[6] Alarm is available when 1-10 Motor
Construction is set to [1] PM, non-salient SPM.
used to run the motor, but will be discharged.
The adjustable frequency drive will perform a
down controlled ramp-down. 2-10 Brake Function must
be set to [0] Off.
The inverter will turn off and the capacitor bank
will back up the control card, thus ensuring a
faster restart when line power is reconnected
(for short power zags).
The adjustable frequency drive will ride through
back-up by controlling speed for generative operation of
the motor utilizing the moment of inertia of the
system as long as sufficient energy is present.
suppress
3 3
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