Hitachi RAS-25SX8 - Page 137

– 170 –
[Connector circuit waveform while the motor runs]
Voltage waveforms of different phases as viewed from
the OV line while the motor rotor is turning counterclockwise
as viewed from the shaft side
φ4 terminal
φ3 terminal
φ2 terminal
φ1 terminal
5 ms. or 10 ms.
Fig. 8-2
Motor for vertical vane, big
・Each stepping motor runs as excited in 1 or 2 phases at 100 PPS or 200 PPS.
・The excitation pattern passes the microcomputer (IC601) and then the driver IC and excites the coil of each stepping motor.
2
4
3
1
Ｍ
Ｍ
Ｍ
Ｍ
Ｍ
12Ｖ
ＣＮ1 8
φ4
φ3
φ2
5
φ1
2
4
3
1
12Ｖ
ＣＮ1 2
φ4
φ3
φ2
5
φ1
φ4
φ3
φ2
φ1
6
12Ｖ
φ4
φ3
φ2
φ1
12Ｖ
φ4
φ3
φ2
φ1
12Ｖ
7
8
9
10
2
4
3
1
5
6
7
8
9
10
ＣＮ１５
21
22
23
24
28
27
26
25
73
74
75
76
77
78
79
80
83
84
85
86
12V
Front panel
−φ4
Front panel
−φ3
Front panel
−φ2
Front panel
−φ1
Lateral vane, left
−φ4
Lateral vane, left
−φ3
Lateral vane, left
−φ2
Lateral vane, left
−φ1
Lateral vane, right
−φ1
Lateral vane, right
−φ2
Lateral vane, right
−φ3
Lateral vane, right
−φ4
Ver tical vane, small
−φ4
Ver tical vane, small
−φ3
Ver tical vane, small
−φ2
Ver tical vane, small
−φ1
Ver tical vane, big
−φ4
Ver tical vane, big
−φ3
Ver tical vane, big
−φ2
Ver tical vane, big
−φ1
ⅠＣ601
8. Stepping motor drive circuit
Microcomputer
Driver IC
Front panel motor
Lateral vane motor, left
Lateral vane motor, right
Motor for vertical vane, small
Fig. 8-1