Toshiba e-studio 160 - Main Motor Drive; Main Motor Drive Operation

December 2002 TOSHIBA TEC 10 - 11 e-STUDIO160/200/250 DRIVE SYSTEM
10.4 Main Motor
10.4.1 Main motor drive
(1) The system control GA (IC34) on the Main PWA sends the MMCLK signal to the main motor.
(2) e-STUDIO160 series
The I/O port GA-2 (IC6) on the Main PWA sends the MMON signal at “High” level to the main motor.
This allows each excitation phase of the motor to be excited through the motor drive circuit to start
rotation.
e-STUDIO200/250 series
The I/O port GA-2 (IC6) sends the MMON signal at “High” level, MMDIR signal at “Low” level, and
MMBRK signal at “High” level to the main motor. This allows each excitation phase of the motor to be
excited through the motor drive circuit to start rotation.
(3) For the main motor, the motor drive circuit detects the rotor position in the motor and the rotational
frequency (FG pulse). It compares the detected rotational frequency with the MMCLK signal in terms
of phase and speed. It adjusts the excitation timing to eliminate the difference in each comparison and
control the rotation of the motor. When the difference in each comparison is then eliminated and the
rotation stabilizes, the main motor sends the MMSYNC signal at “Low” level to the I/O port GA-2.
IC34
System control GA
Motor drive
circuit
NC
IC6
I/O port GA-2
Main PWA
Relay PWA Main motor
Q18
IC3
IC3
MMON
MMCLK
MMSYNC
MMBRK
MMDIR
Q17
+5V
SG
SG
SG
2
(
2
)
4
(
4
)
1
(
1
)
3
(
3
)
5
(
5
)
6
(
6
)
(
7
)
(
7
)
5
3
(
5
)
6
(
8
)
4
(
6
)
2
(
4
)
1
(
3
)
(
2
)
1,4,5
2,3
1,2,5
3,4
VM
PG
CN1
(
CN1
)
CN2
CN29
(
CN30
)
CN28
CN21 CN15
Phase/Speed detection
(
FG pulse
)
Rotor position detection
40
39
43
44
42
44
43
23
72
29
40
39
43
44
42 5
13
6
12
06-04-01
Values in ( ) are for e-STUDIO200/250 series