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
175A100 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.
175A400 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.
175A300 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
210A100 ± 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.
110A100 ± 15Vdc 0.4-10KHz 6-115V 5VA 2.62 x 3.12 0.8" Fix voltage and frequency power oscillator.
110A200 ± 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
269A100 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.
269A101 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.
169A108 19 bit binary 6 decade BCD ± 0.0009° 75 millisec 2.62 x 3.12 0.8" High resolution binary angle to BCD converter.
169A200 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
278A300 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.
178A100 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 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
220A100 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.

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 Desc/Features
430A100 ± 1.3' ± 6.0' to 20rps 2.5-130V50-5000Hz 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
167C100 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
RE-1024 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

Prototyping Boards The Proto-1 D/S & Proto-2 S/D boards allow the user to connect to and test our modules without soldering to the pins. The modules can easily be inserted and removed with no damage.
Click here for datasheet.