Danfoss VLT HVAC, Руководство по программированию

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3.10 Main Menu - Special Functions - Group
14
3.10.1 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.
NOTE
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
14-01 Switching Frequency until the motor is as
noiseless as possible.
NOTE
Not all choices are available in all power sizes.
[0] Ran3 3kHz true random PWM (White noise modulation)
[1] Ran5 5kHz 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] 12.0kHz
[10] 16.0kHz
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 over-modulation function generates an extra
voltage of up-to 8% of U
max
output voltage without
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).
14-08 Damping Gain Factor
Range: Function:
96.0 %
*
[0.0 - 100.0 %]
3.10.2 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and
handling.
14-12 Function at Mains Imbalance
Option: Function:
Operation under severe main imbalance conditions
reduces the lifetime of the motor. Conditions are
considered severe if the motor is operated contin-
uously near nominal load (e.g. a pump or fan
running near full speed).
When a severe mains imbalance is detected:
[0]
*
Trip Select Trip [0] to trip the frequency converter.
[1] Warning Select Warning [1] to issue a warning.
[2] Disabled Select Disabled [2] for no action.
CAUTION
May cause reduced life time.
3.10.3 14-2* Trip Reset
14-20 Reset Mode
Option: Function:
Select the reset function after tripping.
Once reset, the frequency converter
can be restarted.
[0]
*
Manual reset Select Manual reset [0], to perform a
reset via [RESET] or via the digital
inputs.
[1] Automatic reset x 1 Select Automatic reset x 1…x20 [1]-[12]
to perform between one and twenty
automatic resets after tripping.
[2] Automatic reset x 2
[3] Automatic reset x 3
[4] Automatic reset x 4
[5] Automatic reset x 5
[6] Automatic reset x 6
[7] Automatic reset x 7
[8] Automatic reset x 8
[9] Automatic reset x 9
[10] Automatic reset x 10
[11] Automatic reset x 15
[12] Automatic reset x 20
[13] Infinite auto reset
Select Infinite Automatic Reset [13] for
continuous resetting after tripping.
Parameters VLT HVAC Basic Drive Programming Guide
58 MG.18.B1.02 - VLT
®
is a registered Danfoss trademark
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