KEB COMBIVERT F5 Serie Manual De Instrucciones página 88

Operation of the Unit
Carrier frequency
GB
GB
Step frequency 1...3
Input I1
Input I2
Input I1 and I2
GB- 18
The switching frequency with which the power modules are clocked can
be changed depending on the application. The employed power stage
determines the maximum switching frequency as well as the factory
setting (see manual: part2). Refer to following list to learn about influences
and effects of the switching frequency.
low switching frequency
• less inverter heating
• less discharge current
• less switching losses
• less radio interferences
• improved concentricity with low
speed
Adjustment range (dep. on power circuit): 2/4/8/12/16 kHz
Factory setting:
Note:
At switching frequencies above 4 kHz pay absolute attention
to the max. motor line length in the technical data of the power
circuit manual (Part 2).
Three fixed frequencies can be adjusted. The fixed frequencies are
selected with the inputs I1 and I2.
Adjustment range:
Resolution:
Factory settingCP.19:
Factory settingCP.20:
Factory settingCP.21:
If adjustments are made that are outside the fixed limits of CP.10 and
CP.11, then the frequency is internally limited. The negative values are
released in application mode.
The rotation source of the fixed frequencies is not changed by CP.34,
it always corresponds to CP.34 = 2.
high switching frequency
• less noise development
• improved sine-wave simulation
• less motor losses
depending on power circuit
Enter-Parameter
-400...400 Hz
0,0125 Hz
5 Hz
50 Hz
70 Hz