Hitachi RAS-14SH3 - Page 98

– 9 6 –
[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
·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.
Vertical vane, left －φ4
Vertical vane, left －φ3
Vertical vane, left －φ2
Vertical vane, left －φ1
Lateral vane －φ1
Lateral vane －φ2
Lateral vane －φ3
Lateral vane －φ4
8. Stepping motor drive circuit
Microcomputer
Vertical vane motor
Lateral vane motor, left
Lateral vane motor, right
Fig. 8-1
1
12V
2
3
4
5
1
12V
2
3
4
5
1
2
3
4
5
CN15
CN12
24
23
22
21
73
74
75
76
CN9
12V
12V
IC601
φ4
φ3
φ2
φ1
φ4
φ3
φ2
φ1
φ4
φ3
φ2
φ1
M
M
M