Mitsubishi Electric PSSxxMC1Fx Manual page 18

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DIPIPM+ Series Application note
(3) Brake UV Protection Sequence ( with Brake product only : PSSxxMC1Fx)
a1. Control supply voltage V
IGBT turns on by next ON signal (LH).
a2. Normal operation: IGBT ON and collector current.
a3. V level drops to under voltage trip level (UV
D
a4. IGBT of the corresponding phase only turns OFF in spite of control input signal level,
but there is no F
a5. V level reaches UV
D
a6. Normal operation: IGBT ON and outputs current.
Control input
Protection circuit state
Control supply voltage V
Output current Ic
Error output Fo
Publication Date: September 2016
rises. After the voltage reaches under voltage reset level UV
D
signal output.
O
.
Dr
RESET
UV
Dr
a1
D
Fig.2-2-6 Timing Chart of brake circuit UV protection
).
Dt
SET
a3
UV
Dt
a2
a4
Keep High-level (no fault output)
18
,
Dr
RESET
a5
a6