Hitachi RAS-25CNH2 - Power Module Circuit

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3. Power Module Circuit
●
Fig. 3-1 shows the 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.
+
W
U V W
W
–
+
V
V
–
+
U
U
–
+
–
A
+
–
DC Compressor motor
U coil
V coil
W coil
Power module
6D115S
C501
R24
0.35mH
Power relay
R503
R502
Inrush current protection relay
C001
R504
Noise filter coil
A B
Terminal board
FUSE (15A)
Fig. 3-1 Power module circuit (U
+
is ON, V
–
is ON)