Hitachi RAK-35NH5 - Power Module Circuit; System Power Module 1

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Fig. 3-1 shows the power module and its peripheral circuit. The three transistors on the positive + side are called the upper arm, and the three transistors on the negative - side, the lower arm.
3. Power Module Circuit
W coil
V
◯
A
DC compressor motor
U
U coil
V coil
W
◯
−
R24
+ -
+ -
+ -
System Power Module2
Fig. 3-1 Power module circuit (U
+
is ON, V
-
is ON)
W
-
V
-
U
-
W
+
V
+
U+
FUSE(25A)
0.35mH
◯
＋
Noise filter coil 1
Terminal board
L
N
C009(C012)
C503
C501
C502
R002(R003) Inrush prevention relay
R001
Power relayReactor
B
RAM-80QH5 have two power module circuits as shown in Fig. 3-1 because of providing for two cycles and two compressors style.
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