Rotor Magnetic Pole Position Detection Circuit - Hitachi RAM-71QH5 Service Manual

6. Rotor magnetic pole position detection circuit

R601
18
C605
0V
19
C606
0V
20
C607
0V
+5V
+12V
R603
R602
3
C
7
1
6
D
5
2
4
E
11
13
10
9
14
8
12
IC4
0V
Fig. 6-1 Rotor magnetic pole position detection circuit
lnverter
W
R502
R505
R501
B
R604
R605
R606
R607
R611
R608
– 64 –
DC brushless motor
for compressor
V U
R504
R503
A
R610 R609
0V