– 120 –
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
Terminal
board
L
N
R008 Inrush current
protection
relay
C006
C503
C501
C502
R007
R001
Power relay
Coil
B