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參數(shù)資料
| 型號： | DSC-544-H-1-R |
| 英文描述： | Digital-to-Synchro Converter |
| 中文描述： | 數(shù)字到同步器 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 185K |
| 代理商： | DSC-544-H-1-R |
positive and negative pulsating power supply voltage levels will
consistently be lower than the constant DC levels of the DC sup-
ply. Since the voltage levels are lower, the power consumed will
be much less. The power dissipated as heat is equal to the
amplifier current times the difference in voltage between the
power supply and the output. For the DSC-544, the power dissi-
pated is reduced by approximately 50% for reactive loads.
Another advantage of deriving power from the reference input is
that the amplifier section power is easily transformer-isolated
from the D/R converter. The converter output isolation trans-
former can therefore be located in front of the power amplifiers.
Since it does not transfer power, it can be made smaller and an
internal transformer can be used for 60 Hz.
Minimum load impedances are listed in TABLE 1, under Drive
Capability. The DSC-544 is capable of driving the specified load
impedances under worst case conditions. The minimum load
impedances correspond to 4.5 VA at 400 Hz and 1.5 VA at 60 Hz
when frequencies and voltage levels are at their nominal values.
Adequate air circulation is required over the metal top of the con-
verter module. A thermal cutout will disable the converter’s out-
put amplifiers if its internal temperature reaches 125°C.The out-
put is automaticlly restored when the temperature drops below
125°C.
3
+v
- v
+DC SUPPLY LEVEL
-DC SUPPLY LEVEL
POSITIVE PULSATING
SUPPLY VOLTAGE
NEGATIVE PULSATING
SUPPLY VOLTAGE
AMPLIFIER OUTPUT
VOLTAGE ENVELOPE
FIGURE 2. PULSATING POWER SUPPLY
VOLTAGE WAVEFORMS
30
90
150
210
270
330
360
C (DEGREES)
I
R
0
θ
S1-S3 = V SIN
θ + 120°)
S3-S2 = V SIN(
θ + 240°)
S2-S1 = V SIN(
- V
+ V
FIGURE 3. SYNCHRO OUTPUT SIGNALS
tal input angle. A(
θ
), which is called the scale factor variation, is
a smooth function of
θ
without discontinuities and is less than
±0.001 for all values of
θ
. The total maximum variation of Ao
(1 + A(
θ
)) is therefore ±2%. Because A(
θ
) is so small, the DSC-
544 can be used to drive systems such as X-Y plotters or CRT
displays in which the sine and cosine outputs are used indepen-
dently (not ratiometrically as in a control transformer).
S3
2/3 Zso
2/3 Zso
2/3 Zso
S1
S2
Zso
L
FIGURE 4. Z
SO
MEASUREMENT
OUTPUT PHASING AND SCALE FACTOR
The analog output signals have the following phase relationship
and are shown in FIGURE 3.
S1-S3 = (RH-RL) Ao [1 + A(
θ
) sin
θ
]
S3-S2 = (RH-RL) Ao [1 + A(
θ
) sin (
θ
+ 120
°
)]
S2-S1 = (RH-RL) Ao [1 + A(
θ)
sin (
θ
+ 240
°
)]
The output amplitudes simultaneously track the reference volt-
age fluctuations because they are proportional to (RH-RL). The
amplitude factor Ao is 90/115 for 90V rms L-L output. The max-
imum variation in Ao from all causes is ±1.9%.
term A(
θ
) represents the variation of the amplitude with the digi-
The
DRIVING CT AND CDX LOADS
When driving CT and CDX loads the DSC-544 must have
enough steady-state power capability to drive the Zso of the
load. Zso (stator impedance with rotor open-circuited) is mea-
sured as shown in FIGURE 4.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DSC-544-H-3-R | Digital-to-Synchro Converter |
| DSC-544-I-1-R | Digital-to-Synchro Converter |
| DSC015 | High-Voltage Switching Diode |
| DSC30T | 3.0A Power Rectifier |
| DSC30TB | 3.0A Power Rectifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DSC544H3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| DSC-544-H-3-R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital-to-Synchro Converter |
| DSC544I1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| DSC-544-I-1-R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital-to-Synchro Converter |
| DSC544I3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
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