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參數(shù)資料
| 型號： | SDC-14580-842 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 位置變換器 |
| 英文描述： | SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, DIP36 |
| 封裝： | DDIP-36 |
| 文件頁數(shù)： | 4/18頁 |
| 文件大小： | 202K |
| 代理商： | SDC-14580-842 |
12
Data Device Corporation
www.ddc-web.com
SDC-14580
H-05/04-0
The error is positive if it is in phase with the reference and neg-
ative if it is out of phase with the reference.
The e output can swing ±10 V min with respect to ground when
the voltage level of the ±15 V power supplies are 15 V. The out-
put level range changes proportionally with the power supply
level.
INTERNAL DC REFERENCE VOLTAGE (V, PIN 1)
This internal voltage is not required externally for normal opera-
tion of the converter. It is used as the internal dc reference com-
mon with the direct input option. It is nominally +5 V and is pro-
portional to the +15 Vdc supply.
VELOCITY (VEL, PIN 23)
The velocity output (VEL, pin 23) is a dc voltage proportional to
angular velocity d
θ/dt. The velocity is the input to the voltage con-
trolled oscillator (VCO), as shown in FIGURE 1. Its linearity and
accuracy are dependent solely on the linearity and accuracy of
the VCO.
The VEL output can swing ±10 V with respect to ground when
the voltage level of the ±15 V power supplies are 15 V. The out-
put level range changes proportionally with the power supply
level. The analog output VEL characteristics are listed in TABLES
5 and 6.
The VEL output has dc tachometer quality specifications such
that it can be used as the velocity feedback in servo applications.
VEL
FILTERED
91k
VEL
0.01 F
τ = RC = 1/A
FIGURE 17. VEL OUTPUT FILTER
ERROR PROCESSOR
INPUT
θ
Open Loop Transfer function = Output
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
+
-
e
A
2
S
2.75
-12
db/oct
4
BA
(BW)
2A
-6 db/oct
10B
ω (rad/sec)
FIGURE 19. OPEN LOOP BODE PLOT
FIGURE 18. TRANSFER FUNCTION BLOCK
DIAGRAM
2A
2 2 A
ω (rad/sec)
CLOSED LOOP BW (Hz) =
2 A
π
FIGURE 20. CLOSED LOOP BODE PLOT
TABLE 7. DYNAMIC CHARACTERISTICS
PARAMETER
UNITS
BANDWIDTH
RESOLUTION
BITS
10
12
14
16
Input Freq.
kHz
1-5
2-5
Tracking Rate
bandwidth
Ka
A1
A2
A
B
acc - 1 LSB lag
Settling Time
RPS min
Hz
1/sec2
1/sec
Deg/sec2
ms max
800
540
1.5M
6.2
200k
1.2k
600
512k
15
200
←
128k
20
50
←
32k
35
12.5
←
8k
70
← Same as value to left
OVERSHOOT
SMALL SIGNAL
SETTLING TIME
MAX SLOPE EQUALS
TRACKING RATE (SLEW RATE)
θ/2
θ/1
FIGURE 21. RESPONSE TO A STEP INPUT
Note: For 400 Hz and 60 Hz Reference frequencies, use SDC-14560 Series
converters.
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