Main Menu - Special Functions - Group - Danfoss VLT DriveMotor FCP 106 Programming Manual

Parameters

4.10 Main Menu - Special Functions - Group

14
4.10.1 14-0* Inverter Switching
14-01 Switching Frequency
Option:
4 4
[0] Ran3
[1] Ran5
[2] 2.0 kHz
[3] 3.0 kHz
[4] 4.0 kHz
[5] 5.0 kHz
[6] 6.0 kHz
[7] 8.0 kHz
[8] 10.0 kHz
[9] 12.0kHz
[10] 16.0kHz
14-03 Overmodulation
Option: Function:
[0] Off Selects no over-modulation of the output voltage in
order to avoid torque ripple on the motor shaft.
[1] On The over-modulation function generates an extra
voltage of up-to 8% of U
over-modulation, which results in an extra torque of
10-12% in the middle of the over-syncronous range
(from 0% at nominal speed rising to approximately 12%
at double nominal speed).
76
VLT
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
frequency converter must never exceed
1/10 of the switching frequency. When the
motor is running, adjust the switching
frequency in parameter 14-01 Switching
Frequency until the motor is as noiseless as
possible.
NOTICE
High switching frequencies heat the
frequency converter and may reduce its
lifetime.
NOTICE
Not all choices are available in all power
sizes.
3 kHz true random PWM (White noise modulation)
5 kHz true random PWM (white noise modulation)
output voltage without
max
®
DriveMotor FCP 106 and FCM 106 Programming Guide
14-07 Dead Time Compensation Level
Range:
[1]
* Expres-
sionlimit(0)
14-08 Damping Gain Factor
Range:
96 % [0 - 100 %] Damping factor for DC-Link Voltage
*
4.10.2 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and
handling.
14-10 Function at Mains Imbalance
Option:
[0] No function
*
[3] Coasting
14-11 Mains Voltage at Mains Fault
Range:
Expres-
sionlimit(342) V
14-12 Function at Mains Imbalance
Option:
[0] Trip
*
[1] Warning Issues a warning.
[2] Disabled No action.
MG03N102 - Rev. 2013-12-02
Function:
On
[0 - Level of applied deadtime compen-
100] sation in percentage. A high level
(>90%) optimises the dynamic motor
response, a level of 50-90% is good
for both motor-torque-ripple minimi-
sation and the motor dynamics, a zero
level turns the deadtime compen-
sation off.
Function:
Compensation.
Function:
This parameter tells the frequency converter
what to do in the event that mains voltage
drops below the limit set in 14-11 Mains
Voltage at Mains Fault
Function:
[100 - 800 This parameter defines at
V] which AC voltage the selected
*
function in 14-10 Mains Failure
should be activated.
Function:
Operation under severe mains imbalance
conditions reduces the lifetime of the motor.
Conditions are considered severe if the motor is
operated continuously near nominal load (e.g. a
pump or fan running near full speed).
When a severe mains imbalance is detected:
Trips the frequency converter.
CAUTION
May cause reduced life time.