Specifications

34
Dec. 2012
Mitsubishi IPM-series Application Note
Short Circuit (SC)
If a load short circuit occurs or the system controller malfunctions causing a shoot through, the IPMs built in
short circuit protection will prevent the IGBTs from being damaged. When the current, through the IGBT
exceeds the short circuit trip level (SC), an immediate controlled shutdown is initiated and a fault output is
generated.
Note)
1. Tripping of the over current and short circuit protection indicates stressful operation of the IGBT.
Repetitive tripping should be avoided.
2. High surge voltages may occur during emergency shutdown. Low inductance buswork and snubbers are
recommended.
The operating-sequence of the UV protection
a1 : The normal operation=IGBT ON
a2 : The decline of control power supply voltage (UVt)
a3 : IGBT OFF (Even if the input signal is in on state)
a4 : The rise of control power supply (UVr)
a5 : The normal operation=IGBT ON
㩷㩷
㩷
㩷
The operating-sequence of the OT protection
a1 : The normal operation=IGBT ON
a2 : The overheating detection (OTt)
a3 : IGBT OFF (Even if it makes an input signal to be on)
a4 : The overheating detection reset (OTr)
a5 : The normal operation=IGBT ON
㩷
input signal
(Low=ON)
a3
Junction
temperature
Tj
a2
OTr
Condition of
protection circuit
Output current
I(A)
a4
Fo signal
a5a1
OT
SET
RESET
㩷
Using IPM