Hitachi RAS-25CNH1 - Power Module Circuit Analysis; Power Module Circuit Diagram

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Diode stack
Reactor
Inrush current protection relay
Power relay
Stick relay
Noise Filter
Coil
FUSE(15A)
C812
C813
R807
C805
L804
R801
R802
80
F
µ
1000
F
µ
DC current (Id) detect resistance
1
2
U coil
V coil
W coil
DC compressor Motor
u
V
W
u
+
v
+
w
+
u
-
v
-
w
-
Power Module
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3. Power Module Circuit
● Fig. 3-1 shows the power module and its peripheral circuits.
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. 3-1 Power module circuit (U
+
is ON, V is ON)