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

Parameters

4.11 Main Menu - Special Functions - Group

14
4.11.1 14-0* Inverter Switching
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
frequency converter must never exceed
1/10 of the switching frequency. When the
motor runs, adjust the switching frequency
in parameter 14-01 Switching Frequency
until the motor is as quiet as possible.
NOTICE
High switching frequencies increase heat
generation in the frequency converter and
may reduce its lifetime.
NOTICE
Not all options are available in all power
sizes.
[0] Ran3 3 kHz true random PWM (White noise
modulation).
[1] Ran5 5 kHz true random PWM (white noise
modulation).
[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] 12.0 kHz
[10] 16.0 kHz
14-03 Overmodulation
Option: Function:
[0] Off Selects no overmodulation of the output voltage to
*
avoid torque ripple on the motor shaft.
[1] On The overmodulation function generates an extra
voltage of up to 8% of U
overmodulation. This extra voltage results in an extra
torque of 10–12% in the middle of the oversyncronous
range (from 0% at nominal speed, rising to approxi-
mately 12% at double nominal speed).
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Programming Guide
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14-07 Dead Time Compensation Level
Range: Function:
Size [0 - Level of applied deadtime compensation
related 100 ] in percentage. A high level (>90%)
*
optimizes the dynamic motor response, a
level of 50–90% is good for both motor-
torque-ripple minimization and the
motor dynamics, a 0 level turns off the
deadtime compensation.
14-08 Damping Gain Factor
Range: Function:
Size related [0 - 100 %] Damping factor for DC-link voltage
*
compensation.
14-09 Dead Time Bias Current Level
Range: Function:
Size related [0 - 100 %] To add to the current-sense signal for
*
dead time compensation for some
motors, set a bias signal (in
percentage).
4.11.2 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and
handling.
14-10 Function at Mains Imbalance
Option: Function:
This parameter tells the frequency converter
what to do if mains voltage drops below the
limit set in parameter 14–11 Mains Voltage at
Mains Fault.
[0] No function
*
[3] Coasting
14-11 Mains Voltage at Mains Fault
Range: Function:
Size related [100 - 800 This parameter defines at which AC
*
V] voltage the selected function in
parameter 14–10 Mains Failure must
be activated.
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