Synchro Amplifiers and Related Conversion Products
Synchro Amplifiers
Control Sciences, Inc. (CSI) manufactures a line of synchro amplifiers with high input impedances and output drives ranging from 3VA to 25VA. Synchro outputs are transformer isolated with capabilities of driving CT, CDX and TR loads. All synchro amplifiers have short circuit, over-load and thermal protection.
Series |
Input |
Accuracy |
Output |
Drive |
Package |
Description/Features |
synchro/ resolver 6.8/11.8/90V 50-400Hz |
±2.0' |
synchro/ resolver 11.8/90V |
3VA |
2.62 x 3.12 x 0.8" |
Transformer isolated with short circuit and thermal cut-off protection. Integral metal cover provides required heat sinking. Operates from ±15V power. |
|
| 175A600 | synchro/ resolver 6.8/11.8/90V 400Hz |
±4.0' |
synchro/ resolver 6.81/11.8/90V |
5VA |
2.62 x 3.12 x 0.8" |
Transformer isolated with short circuit and thermal cut-off protection. Integral metal cover provides required heat sinking. Operates from ±15V power. |
synchro/ resolver 6.8/11.8/90V 50-400Hz |
±3.0' |
synchro 11.8/90V |
15VA |
7.3 x 4.4 x 1.5" (400Hz) bulkhead mount |
Fully isolated referenced powered with short circuit and thermal cut-off protection. Designed for airborne and commercial applications. |
|
synchro/ resolver 6.8/11.8/90V 50-400Hz |
±3.0' |
synchro 11.8/90V |
25VA |
7.4 x 5.1 x 2.6" (60Hz) 7.4 x 5.1x 1.8" (400Hz) bulkhead mount |
Reference powered with fully protected outputs. 75VA peak power with "locked rotor" protection for driving torque receiver loads. Fully isolated with Disable input and Fault output. |
|
| 175A700 | synchro/ resolver 6.8/11.8/90V 60-400Hz |
±3.0' |
synchro 11.8/90V |
25VA |
7.4 x 5.1 x 2.6" bulkhead mount |
Operates from 115Vrms 60Hz and 400 Hz snychro reference power, no DC power is required. Outputs are fully protected; overload, short circuit, thermal and "locked rotor". Drives CT, CDX and TR loads. |
Power Oscillators
CSI manufactures power oscillators intended for synchro or resolver excitation. Units can be specified with output frequencies between 400Hz to 10KHz with voltages ranging from 2.4Vrms to 115Vrms at 5VA
Series |
Power Input |
Frequency |
Output |
Drive |
Package |
Description/Features |
±12 to ±15Vdc |
0.4-5KHz |
0-15V |
150mA |
2.0 x 2.0 x 0.4" |
Resolver excitation oscillator with eight discrete frequencies. Digital amplitude and frequency control. |
|
±15Vdc |
0.4-10KHz |
2.5-7.0V |
5VA |
2.0 x 2.0 x 0.4" |
Fixed frequency power oscillator with resistor progammable amplitude control. |
|
±15Vdc |
0.4-10KHz |
6-115V |
5VA |
2.62 x 3.12 0.8" |
Fix voltage and frequency power oscillator. |
|
±15Vdc |
10KHz |
5/10/15/20V |
5VA |
2.62 x 3.12 0.8" |
Inductosyn oscillator. |
Angle Code Converters
Most Synchro/Resolver to Digital converters output a parallel binary angle (BAMS) CSI manufactures a line of converters that convert (BAMS) to a BCD angle.
Series |
Input |
Output |
Accuracy |
Convert Time |
Package |
Description/Features |
12 bit binary |
4 decade BCD |
±0.125° |
2.5 millisec |
2.0 x 2.0 x 0.4" |
Low power binary angle to BCD converter. |
|
15 bit binary |
5 decade BCD |
±0.009° |
60 millisec |
2.0 x 2.0 x 0.4" |
Either 0 to 360° or 0 to ±180° output. |
|
19 bit binary |
6 decade BCD |
±0.0009° |
75 millisec |
2.62 x 3.12 0.8" |
High resolution binary angle to BCD converter. |
|
19 bit binary |
6 decade BCD |
±0.0003% |
400 millisec |
2.62 x 3.12 0.8" |
Factory programmable scale factor. |
LVDT/RVDT to Digital Converters
CSI manufactures both an 11 bit and a 14 bit LVDT/RVDT to digital converters. These converters linearly convert the outputs of AC energized LVDT and RVDT transducers directly into digital format. The converters use ratiometric conversion techniques requiring no need for high stability oscillators. The converters are type II tracking converters that exhibit no velocity errors and only minor acceleration errors
Series |
Resolution |
Accuracy |
Tracking |
Input |
Package |
Description/Features |
11 bit offset binary |
±0.1% |
to 400LSB/ millisec |
2.5V 0.4-10KHz |
2.0 x 2.0 x 0.4" |
Ratiometric tracking LVDT/RVDT converter with over-range output. |
|
14 bit offset binary |
±0.024% |
to 400LSB/ millisec |
2.5V 0.4-5KHz |
2.62 x 3.12 x 0.4" |
High accuracy ratiometric LVDT/RVDT converter with programmable gain and built-in excitation oscillator. |
Inductosyn™ Preamplifier
CSI manufactures an inductosyn preamplifier used for amplifying low lever inductosyn slider signals. When used in conjunction with a power oscillator and a resolver to digital converter they form a complete inductosyn to digital converter.
Series |
Input |
Gain |
Frequency |
Output |
Package |
Description/Features |
Inductosyn slider |
1300 |
2.5-10KHz |
3V max |
2.0 x 2.0 x 0.4" |
Low noise inductosyn preamplifier. Use with 210A100 and 268B300 to form complete inductosyn to digital converter. |
Synchro/Resolver to Linear DC Converter
Control Sciences, Inc. manufactures a miniature synchro/resolver to linear DC converter with improved performance over earlier designs. The converter employs a type II tracking synchro/resolver to digital converter in conjunction with a high speed digital to analog converter. This combination provides synchro to linear DC conversion that exhibits no velocity errors and only minor acceleration errors. Ratiometric conversion techniques are used to ensure high noise immunity and insensitivity to excitation variations and harmonic distortion.
Series |
Resolution |
Accuracy |
Tracking |
Input |
Output |
Package |
Description/Features |
±1.3' |
±6.0' |
to 20rps |
2.5-130V 50-5000Hz |
0 to +10Vdc or 0 to ±10Vdc |
2.0 x 2.5 x 0.5" |
Tracking converter insensitive harmonic distortion, amplitude and frequency variations. |
Coarse/Fine Two-Speed Digital Processor
Used for combining the digital outputs of two synchro or resolver to digital converters in a mechanical or electrical geared coarse/fine two speed system and providing a single unambiguous digital word representing the coarse shaft angle.
Series |
Coarse Input |
Fine Input |
Output |
Speed Ratio |
Package |
Description/Features |
7 bit binary |
14 bit binary |
19 bit binary |
36:1, 18:1, 9:1 |
2.62 x 3.12 x 0.4” |
Low profile, industry standard pin-out |
Resolver to Encoder Converter System
The RE-1024 converts the stator outputs of a resolver to incremental encoder A quad B signals plus a gated Z marker. The unit is fully self-contained; operating from universal 85-440Hz power and incorporates its own programmable resolver excitation oscillator. The oscillator has four different operating frequencies with amplitude control allowing for compatibility with most industrial brushless resolvers.
Series |
OSC Out |
Stator In |
Digital Out |
Cycles/Turn |
Package |
Description/Features |
2.6-5.9Vrms |
2.6Vrms |
A quad B +Z |
128, 256, 512,1024 Programmable |
3.5 x 5.0 x 0.875” PCB with screw terminals |
Fully self-contained with programmable resolver excitation oscillator. TTL/CMOS outputs + complements |
