Fuji Electric Co., Ltd.
3-21
MT6M12343 Rev.1.0
Dec.-2016
Chapter 3
Detail of Signal Input/Output Terminals
8. Over Heating Protection
The over-
heating protection (OH) functions is integrated into “6MBP**XSF060-50”.
The OH function monitors the LVIC junction temperature.
The TOH sensor position is shown in Fig.2-2.
As shown in Fig.3-26, the IPM shut down all lower side IGBTs when the LVIC temperature exceeds
T
OH
.
The fault status is reset when the LVIC temperature drops below
T
OH
–
T
OH(hys)
.
t
1
: The fault status is activated and all IGBTs of the lower side arm shut down, when LVIC temperature
exceeds case overheating protection (OH) temperature TOH.
t
2
: The fault status, which outputs over t
FO
, is reset and next input signal is activated, when LVIC
temperature falls below
T
OH
–
T
OH(hys)
which is the case overheating protection hysteresis.
Fig.3-26 Operation sequence of the Over Heat operation
T
OH
T
OH(hys)
> t
FO
(min.)
T
OH
–
T
OH(hys)
t
1
t
2
