General Electrical Data; Switching Frequency And Temperature; Switching Frequency And Temperature Of The Peak Power Devices; Table 17: Switching Frequency And Temperature Of The Peak Power Devices - KEB COMBIVERT F6 Series Instructions For Use Manual

GENERAL ELECTRICAL DATA

3.3 General electrical data

3.3.1 Switching frequency and temperature

The drive controller cooling is designed by way that the heat sink overtemperature
threshold is not exceeded at rated conditions. A switching frequency higher than the rat-
ed switching frequency also produces higher losses and thus a higher heat sink heating.
If the heat sink temperature reaches a critical threshold (T
can be reduced automatically step by step. This prevents that the drive controller switch-
es off due to overheating of the heat sink. If the heat sink temperature falls below the
treshold T
T
EM
ating" must be activated, for this function to work.

3.3.1.1 Switching frequency and temperature of the Peak Power devices

Device size
Rated switching frequency
Max. switching frequency
Min. switching frequency
Max. heat sink temperature
Temperature for derating the switching fre-
quency
Temperature for uprating the switching fre-
quency
Temperature for switching to rated switching
frequency
Table 17: Switching frequency and temperature of the Peak Power devices
The output frequency is to be limited in such a way that it does not exceed 1/10 of the switching frequency.
1)
, the switching frequency is increased back to the setpoint. At temperature
UR
the switching frequency is immediately reduced to rated switching frequency. „Der-
1)
1)
1)
/ kHz
f
SN
/ kHz
f
S_max
f / kHz
S_min
/ °C
T
HS
/ °C
T
DR
/ °C
T
UR
T / °C
EM
), the switching frequency
DR
16
4
8
1,25
95
80
70
85
39