Nord Drivesystems SK 510P, Руководство с инструкциями по установке

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NORDAC PRO (SK 500P) – Manual with installation instructions
158 BU 0600 en-3221
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.
Duri
ng 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.