Menu 7 Introduction Parameter x.00
Parameter
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Keypad and
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CT Modbus
RTU
User
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Advanced parameter
descriptions
86 Commander SK Advanced User Guide
www.controltechniques.com Issue Number: 2
The IGBT junction temperature is calculated using Heatsink temperature (Pr 7.04) and a thermal model of the drive power stage. The resulting
temperature is displayed in this parameter. The calculated IGBT junction temperature is used to modify the drive switching frequency to reduce losses
if the devices become too hot (see Pr 5.08 on page 58).
In addition to monitoring the IGBT junction temperatures the drive includes a thermal protection system to protect the other components within the
drive. This includes the effects of drive output current and DC bus ripple. The estimated temperature is displayed as a percentage of the trip level in
this parameter. If the parameter value reaches 100% an O.ht3 trip is initiated.
7.34 IGBT junction temperature
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range ±200
°C
Update rate Background
7.35 Drive thermal protection accumulator
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111 1
Range 0 to 100 %
Update rate Background
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