Hitachi RAS-35FH6 - Intelligent Power Module (IPM) Diagnosis

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4. IPM (Intelligent Power Module)
• Fig.4-1 shows the intelligent power module and its peripheral circuit.
The three transistors on the positive E side are called the upper arm, and the three transistors on the
negative D side, the lower arm.
Fig. 4-1 Intelligent power module circuit (U
+
is ON, V
-
is ON)
IP limitter
E
E
E