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參數(shù)資料
| 型號： | SDC-14587-575W |
| 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?。?/td> | 202K |
| 代理商： | SDC-14587-575W |
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
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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