Nord Drivesystems SK 300P Series - Additional Parameters

NORDAC ON / ON+ (SK 3xxP) – Manual with installation instructions
94 BU 0800 en-4521
5.1.6 Additional parameters
P501 Inverter name
Setting range
A … Z
(char)
Arrays
[-01] … [-20]
Factory setting
{ 0 }
Description
Free input of a designation (name) for the device (max. 20 characters). With this, the
frequency inverter can be uniquely identified for setting with NORDCON software or
within a network.
P504 Pulse frequency S
Setting range
4.0 ... 16.4 kHz
Factory setting
{ 6.0 }
Description
The internal pulse frequency for controlling the power unit can be changed with this
parameter. A higher setting value reduces motor noise, but leads to increased EMC
emissions and reduction of the possible motor torque.
Note
The best possible degree of interference suppression for the device is achieved by
using the default value and taking the wiring directives into consideration.
Raising the pulse frequency leads to a reduction of the possible output current,
depending on the time (I
2
t curve). When the temperature warning limit C001 is
reached, the pulse frequency is gradually lowered to the default value (see also
P537). If the inverter temperature drops by a sufficient amount, the pulse frequency is
increased to the original value.
The pulse frequency must not change if a sine filter is used. Otherwise, “Module
errors” (E4.0) can be triggered.
See setting 16.2 and 16.3
Setting values
Value Meaning
4.0
…
16.0
Pulse frequency 4.0… 16.0 kHz
The value which is set is used as the standard pulse frequency.
With increasing overload the frequency inverter automatically
gradually reduces the pulse frequency to the default value.
16.1
Automatic setting of the maximum
possible pulse frequency
The frequency inverter continuously determines and automatically
sets the highest possible pulse frequency.
16.2
Pulse frequency 6 kHz
Fixed pulse frequency setting. This value remains constant even in
case of overload (suitable for operation with a sine filter).
NB: With these settings, short circuits at the output which occur
before enabling may possibly not be detected correctly.
16.3 Pulse frequency 8 kHz
16.4 Automatic load adjustment
The pulse frequency is automatically adjusted between a minimum
value (highest load reserve) and a maximum value (lowest load
reserve) depending on the load.
During an acceleration phase and if high power is required (≥ rated
power) the minimum value is set. With constant speed and a power
requirement ≤ 80 % to the rated power, the high pulse frequency is
set.