Hitachi RAF-25FX8 Service Manual page 100

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.
Microcomputer
Fig. 4-1 Intelligent power module circuit (U
E
E
+
is ON, V is ON)
– 118 –
E
-