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參數(shù)資料
| 型號(hào)： | 5962-0423501KXC |
| 元件分類： | 位置變換器 |
| 英文描述： | SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, CQFP52 |
| 封裝： | 0.956 X 0.956 INCH, 0.100 INCH HEIGHT, HERMETIC SEALED, CERAMIC, QFP-52 |
| 文件頁數(shù)： | 2/19頁 |
| 文件大小： | 217K |
| 代理商： | 5962-0423501KXC |
10
SCD5028-1 Rev H 6/21/07
Aeroflex Plainview
C2(farads) = 1/(G1 R1)
C3(farads) = C2/10
R2(ohms) = 2/(G C2)
ACT5028B EXAMPLE CALCULATIONS
Carrier Frequency = 800 Hz
Nominal Resolver Input Level = 1.3Vrms
Resolution = 14 bits
Closed Loop Bandwidth (BWcl) = 20 Hz
Maximum Tracking Rate in RPS = 1
Hysteresis = 1 LSB
EG = Nominal Resolver Input Level
.011 [14 bit] = 1.3 .011 = .014
G = 2.22
BWcl = 2.22 20 = 44.4
HYS = 1 [14 bit]
R1(ohms) = 6 10
6 EG HYS = 6 106 .014 1 = 84K. Use closest standard resistor = 84.5K 1%
G2 = Maximum Tracking Rate
213 = 8192 [213 for 14 bits]
R3(ohms) = (25 10
9)/G2 = (25 109)/8192 = 3,050K. Use closest standard resistor = 3.01M 1% or 3M 5%
G
2 = EG 0.45 G1 G2
G1 = G
2/(EG .45 G2) = 44.42/(.014 .45 8192) = 38.2
C2(farads) = 1/(G1 R1) = 1/(38.2 84.5K) = .31F. Use closest standard capacitor = .33F 10%
C3 = C2/10(farads) = C2/10 = .33/10 = .033F
R2(ohms) = 2/(G C2) = 2/(44.4 .33) = 136.5K. Use closest standard resistor = 137K 1%
SIGNAL AND REFERENCE INPUT CONDITIONING
Inputs to the converter should be 1.3 Vrms nominal, resolver format referenced to VCC/2 nominal Figure 5
shows various input configurations.
REFERENCE CONDITIONING
Most resolvers have a LEADING input to output phase shift. A simple C-R leading phase shift network
(Figure 5 – Reference Conditioning) from the resolver reference to the RDC’s reference input will provide
the compensating phase shift required to bring the signals in phase. If the resolver has a LAGGING input
to output phase shift an R-C lagging phase shift network (low pass network) would be required.
Note the C-R phase lead circuit on the input to the Demodulator (BPF1 and BPF2) in Figure 2 should be
considered when calculating the total system phase compensation.
The formula for calculating the phase shift network is as follows:
1
Phase angle = ArcTan
6.28 x (R7 + R8) x C
FREF
Select a convenient capacitor value and perform the following calculation to determine the proper resistor
value.
R =
1
(Tan (Phase Angle)) x FREF x 6.28 x C
* Software Program SW5028-2 available at Aeroflex WEB site.
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