14-30 Current Lim Ctrl, Proportional Gain
Range:
Function:
higher value makes the controller
react faster. Excessive value setting
leads to controller instability.
14-31 Current Lim Ctrl, Integration Time
Range:
Function:
Size
related
*
[0.002 - 2 s]
Control the current limit control
integration time. Setting it to a
lower value makes it react faster. A
setting too low leads to control
instability.
14-32 Current Lim Ctrl, Filter Time
Range:
Function:
Size
related
*
[1 - 100 ms]
Set a time constant for the current
limit controller low-pass filter.
3.10.5 14-5* Environment
These parameters help the frequency converter to operate
under special environmental conditions.
14-51 DC-Link Voltage Compensation
The rectified AC-DC voltage at the frequency converter's DC-link
is associated with voltage ripples. These ripples can increase in
magnitude with increased load. A compensation method is used
to reduce these voltage ripples at DC link. In field-weakening, it
is recommended to turn DC link compensation off.
Option:
Function:
[0]
Off
The overmodulation for output
voltage is off to avoid torque ripple
on the motor shaft.
[1]
*
On
Enables the overmodulation for
output voltage to obtain an output
voltage up to 15% greater than the
mains voltage.
14-52 Fan Control
This parameter is used to select the fan control operating mode.
The acoustic noise of the frequency converter is different from
running heavy load (high heat sink temperature) to running light
load or stand-by mode.
Option:
Function:
[0]
Auto
The fan runs with full speed for a
short time and then automatically
adjusts the speed according to the
load and ambient temperature. The
fan also runs at minimum speed
even if the reference is 0 Hz due to
the heat generated from the IGBT.
The fan stops if sleep mode
function is activated. This is the
14-52 Fan Control
This parameter is used to select the fan control operating mode.
The acoustic noise of the frequency converter is different from
running heavy load (high heat sink temperature) to running light
load or stand-by mode.
Option:
Function:
default setting for all frequency
converters except H1 enclosure
sizes.
[5]
Constant-on
mode
For on-site fan test or if the fan
must run 100% speed constantly.
Only valid for H1-H5 & I2-I4
enclosure sizes.
[6]
Constant-off
mode
If convection cooling is sufficient or
the frequency converter is mounted
in a demonstration panel,
exhibitions and so on. The
frequency converter trips on heat
sink overtemperature if loaded
more than the convection cooling
allows. Only valid for H1-H5 & I2-I4
enclosure sizes.
[7]
On-when-
Inverter-is-on-
else-off Mode
The fan runs at maximum speed if
in hand-on mode or reference is
above 0 Hz. The fan is stopped if
sleep mode is active. This is the
default setting for H1 enclosure size
only but can also be selected for
H2-H5 & I2-I4 enclosure sizes.
14-55 Output Filter
Select whether an output filter is present.
Option:
Function:
[0]
*
No Filter
[1]
Sine-Wave
Filter
[3]
Sine-Wave
Filter with
Feedback
3.10.6 14-6* Auto Derate
Parameter group for configuring automatic derating based
on the output frequency of the frequency converter.
14-61 Function at Inverter Overload
When the frequency converter issues an inverter overload
warning, select whether to continue and probably trip the
frequency converter or derate the output current.
Option:
Function:
[0]
*
Trip
[1]
Derate
Parameters
VLT
®
Compressor Drive CDS 803
56
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MG18P202
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