Hitachi RAS-18FH6 - DESCRIPTION OF MAIN CIRCUIT OPERATION; 3. Intelligent power module circuit (IPM circuit)

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Fig. 3-1 System power module circuit (U
+
is ON, V
-
is ON)
3. Intelligent power module circuit (IPM circuit)
Fig. 3-1 shows peripheral circuits of intelligent power module (IPM). In the diagram, U
+
,V
+
and W
+
are called the
"upper arm", U
-
, V
-
and W
-
, the "lower arm".