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參數(shù)資料
| 型號： | SDC-19204-304 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 位置變換器 |
| 英文描述： | SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, DIP40 |
| 封裝： | 1.140 X 2.020 INCH, 0.230 INCH HEIGHT, TDIP-40 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 124K |
| 代理商： | SDC-19204-304 |
10
DYNAMIC PERFORMANCE
A Type II servo loop (Kv = ∞) and very high acceleration con-
stants give the SDC-19204/6 superior dynamic performance as
listed in TABLE 4.
VELOCITY RESPONSE
A filter on the VEL output will, for a step input in velocity, elimi-
nate the velocity overshoot (normally critically damped) and filter
carrier frequency ripple. The VEL filter is shown in FIGURE 14.
TRANSFER FUNCTIONS
The dynamic performance of the converter can be determined
from its transfer function block diagram (FIGURE 15) and open
and closed-loop Bode plots (FIGURES 16 and 17 and TABLE 4
lists the parameters relating to the SDC-19204/6’s dynamic char-
acteristics for different resolution and bandwidth modes.
-12
db/oct
4
BA
2A
-6 db/oct
10B
ω (rad/sec)
2A
2 2 A
ω (rad/sec)
CLOSED LOOP BW (Hz) =
2 A
π
ERROR PROCESSOR
SYNCHRO
INPUT
CONVERTER
TRANSFER
FUNCTION
WHERE:
2
A = A A
1
2
VELOCITY
OUT
DIGITAL
POSITION
OUT (
φ)
VCO
CT
S
A
+ 1
1
B
S
+ 1
10B
H = 1
S
A
+ 1
1
B
2
S
+ 1
10B
G =
+
-
e
A
2
S
Note: See TABLE 4 for values of A1 A2, and B
FIGURE 15. TRANSFER FUNCTION BLOCK DIAGRAM
FIGURE 16. OPEN LOOP BODE PLOT
FIGURE 17. CLOSED LOOP BODE PLOT
VEL
FILTERED
R=100k
VEL
C = 0.082
F
VEL
FILTERED
R=100k
VEL
C = 0.33
F
HIGH BW
LOW BW
τ = RC = 1/A
FIGURE 14. VEL OUTPUT FILTER
TABLE 7. ACCURACY/RESOLUTION
ACCURACY
10
BIT
12
BIT
14
BIT
16
BIT
2’ + 1 LSB
3’ + 1 LSB
4’ + 1 LSB
8’ + 1 LSB
23.1
24.1
25.1
29.1
7.3
8.3
9.3
13.3
3.3
4.3
5.3
9.3
2.3
3.3
4.3
8.3
SDC-1920X-304
SDC-1920X-303
SDC-1920X-302
SDC-1920X-301
SDC-1920X SERIES
MODEL NO.
ACCURACY AND RESOLUTION
TABLE 7 lists the total accuracy including quantization for the
various resolution and accuracy grades.
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