TEGAM INC. MODEL DSRS-5DA DECADE SYNCO/RESOLVER
Contents
1. 1 1 PURPOSE The Model DSRS combines the functions of a decade synchro standard and a decade resolver standard into a single unit A front panel switch changes the unit from one mode to another The standard may be used to simulate a master component in a system Accurately known inputs may be introduced into the system for testing autopilots servos aircraft indicators etc This technique can also be used to check the response of a servo loop As a synchro standard the unit may be used to transmit precise angular data to control differential transmitters CDX s and control transformers CT s see Figure 1 2 Most commercially available synchros of this type may be excited without affecting the 2 second of arc accuracy The unit may also be used to excite torque differential transmitters TDX s differential receivers TDR s and receivers TR s As a resolver standard the unit may be used to transmit precise angular data to resolver control differential transmitters RD s and resolver control transformers RC s As with the synchro mode most commercially available resolvers may be excited without affecting the 2 second of arc accuracy When the Model DSRS is used for testing components either the Proportional Voltage Gradient or the Proportional Voltage Nulling method may be used If the Proportional Voltage Nulling method is used the Model DSRS may be adjusted 1 1 to obtain a null instead of the dividing head In this case2. Re Canin QR ie 1 3 3 1 BINDING POST IDENTIFICATION SYNCHRO 3 1 5 1 ANGULAR ACCURACY RESOLVER IH Hmm nen 5 4 5 2 ANGULAR ACCURACY DECADE INCREMENTS RESOLVER 5 5 5 3 ANGULAR ACCURACY SYNCHRO 5 5 5 4 Es MAX SWITCH POSITION VERSUS OUTPUTS 5 6 LIST OF ILLUSTRATI ONS FIGURE TI TLE PAGE 1 1 MODEL DSRS 5DA DECADE SYNCHRO RESOLVER STANDARD 1 0 1 2 TYPICAL TEST SETUP SYNCHRO 1 4 1 3 TYPICAL TEST SETUP RESOLVER 1 4 4 1 RESOLVER MODE SIMPLIFIED eee HII enne 4 4 4 2 STANDARD SYNCHRO CONTROL TRANSMITTER CX 5 2 2 4 5 4 3 SYNCHRO MODE SIMPLIFIED 4 5 4 4 MODEL DSRS 5DA SCHEMATIC 4 6 5 1 ANGULAR ACCURACY TEST SETUP RESOLVER 5 4 5 2 ANGULAR ACCURACY TEST SETUP SYNCHRO 5 7 5 3 OUTPUT VOLTAGE TEST SETUP RESOLVER 2 5 8 FIGURE 1 1 MODEL DSRS 5DA SYNCHRO RESOLVER STANDARD 1 0 SECTION GENERAL DESCRI PTI ON
3. the angular error may be read directly from setting of the control switches 1 2 GENERAL DESCRIPTION Because of their very low output impedance and extremely low output impedance unbalance the standards may be operated under normal load with no degradation of accuracy The angular accuracy is based on the use of toroidal transformers and therefore age or environmental conditions have little effect The following features are incorporated in the unit a 100 increment switching to simulate operation over a full 360 b Separate sets of binding posts for the synchro and resolving outputs C Selectable output Es max d Excitation of 115 or 26 vac 1 2 1 Resolver Mode The unit forms a precision transformer instrument designed to simulate the ideal electrical outputs of a resolver control transmitter RX Each section transforms an input signal to two isolated voltages one of the output voltages is proportional to the sine of the angle displayed on the dials and the other is proportional to the cosine 1 2 2 Synchro Mode In the synchro mode the four wire output is converted to a three wire output in a Scott tee transformer arrangement The unit simulates the ideal 3 wire electrical output of a synchro control transmitter CX One of the three voltages is directly proportional to the sine of the angle displayed on the dials and the other two voltages are located 120 in amplitude from the first 1 2 3 Specifications Refe
4. 001 T7 T8 1 401830 001 9 110 1 401825 001 Figure 4 4 Model DSRS 5DA Schematic Diagram 4 6 OAATINZ lt MN lt SECTION V MAINTENANCE 5 1 GENERAL Since the standards are passive devices a minimum of maintenance is required With the exception of cleaning switch contacts no maintenance on a regularly scheduled basis is required Moving parts are lubricated at the factory and should require no further lubrication 5 2 SWITCH SERVICING During calibration intervals clean switch contacts with a good grade of solvent such as alcohol or acetone Relubricate contacts with a thin layer of vaseline 5 3 REPAIRS If any repairs are made on the unit if any parts are replaced check the accuracy of the unit as outlined below If any transformer problems are encountered it is recommended that the unit be returned to the factory for overhaul and recalibration 5 4 CALIBRATION The accuracy of the standard should be maintained for a period of not less than three years provided that the unit is kept in a normal laboratory environment has clean low resistance contacts and does not suffer injury or insulation damage Under these conditions the unit should only require calibration every three years Under more severe conditions the calibration period must be shortened Note Full calibration is to be done with 115V rms 400 Hz reference input and 115 V Es MAX output The
5. remaining outputs shall be tested on a random basis 5 1 5 5 TEST EQUI PMENT To test the accuracy of the unit the following test equipment or equivalent is required a Phase Angle Voltmeter Tegam Model PAV 4B or 4C b Ratio Standard Tegam Model 1011A c Audio Oscillator 20Hz to 20k Hz d Power Amplifier 200W b Digital Voltmeter 5 6 ANGULAR ACCURACY RESOLVER MODE To test the angular accuracy of the resolver standard proceed as follows a Connect unit into test setup as shown in Figure 5 1 NOTE Connect the ratio standard directly to the output terminals of the resolver standard to eliminate errors resulting from voltage drops in the interconnecting leads b Adjust Phase Angle Voltmeter to measure in phase voltage Set resolver standard to 0 d Adjust ratio standard as required to obtain a null on Phase Angle Voltmeter ratio standard shall indicate an output ratio A theoretical of 0 000000 within the limits set by the A column of Table 5 1 f Repeat test at every 5 increment between 0 and 360 Refer to Table 5 1 for the required output ratio and tolerances 5 2 NOTE The effective output impedance unbalance of the standard may be readily checked by applying a BALANCED load to the output and measuring A When testing with an inductive load it is recommended that non ferromagnetic inductors GR Type 1482 or equivalent be used to prevent output voltage variations from changi
6. 00055 s 405406 0000100 oo 0 0015708 9 00000100 TABLE 5 3 ANGULAR ACCURACY SYNCHRO MODE x Anea tpm 0 11 0 000000 135 0 267949 210 0 500000 0 732051 5 5 Table 5 4 Ec MAX Switch Position Versus Outputs 115 V INPUT OUTPUT VOLTS MAX OUTPUT COS 0 VOLTAGE at terminals 54 52 SW POSITON 09 45 90 135 180 225 270 OUTPUT SIN 0 VOLTAGE at terminals 53 and 51 SW POSITON 45 135 180 225 270 0 81 317 115 0 5 6 PHASE ANGLE VOLTMETER SWITCH QUADRANT posITION RATIO STANDARD 115 400 Hz SYNCHRO STANDARD SWITCH Figure 5 2 Angular Accuracy Test Setup Synchro Mode 5 7 Power Source 115 Vac 400 Hz Figure 5 3 Output Voltage Test Setup Resolver Mode SIN 0 COS 0 5 8
7. ITCH 402785 001 402323 001 REAR FRONT 53 YEL IZ C 8 1 6 V Se BLK FRONT 3 3 2 4 4 0 51 BLU 1 usv 0 10 EQUAL LENGTH RED REAR 13121 01234567894 2 LEADS 10 10 10 10 10 9 9 9 9 9 8 8 8 8 8 rn 12 66 6 6 6 6 5 5 s 15 fs Q 7 9 53 S2 BLK H 4 42 4 4 4 Dd C 3 3 3 s BEY Ore ejr 2 EI E EIE 45 4 1 14 1 1 1 B mi 0 0 SIN 19 9 8 5 L d B 1 1441 0 81 S4 RED REAR 1 172 4 3 2 BLK 10 10 10 10 10 EQUAL LENGTH 0 300 2 9 9 2 9 11 TL 200 8 8 8 8 8 FRONT 15 ae 7 7 7 7 7 13 12 6 S 6 6 n Od 5 Se 5 5 Se S2 S1 YEL 15 3 2 1 011121314151617 18194 T2 LEADS 4 22 4 4 4 16 3 3 3 3 3 FRONT 23 17 2 2 2 2 cos i 19 Pos Fu B B CASE 19 A RS LO s4 53 BLU 19 REAR 42 oye INDICATES TWISTED PAIR D 1 USE 100075 ON 1 SWITCH USE 100 TS ON 1 SWITCH 585 508 0Q TS ON 01 0001 SWITCHES DDR 4 3 USE 4 FUR 10 SWITCH BUSSING SEE 1 1 401824 001 1 500781 001 1 401826 001 5 FDR 100 SWITCH BUSSING SEE 1 401858 001 1 500780 001 75 76 1 401859
8. TEGAM INC MODEL DSRS 5DA DECADE SYNCO RESOLVER STANDARD Instruction Manual PN 500783 349 Publication Date Novermber 2007 REV A NOTE This user s manual was as current as possible when this product was manufactured However products are constantly being updated and improved Because of this some differences may occur between the description in this manual and the product received Warranty TEGAM Inc warrants this product to be free from defects in material and workmanship for a period of 1 year from the date of shipment During this warranty period if a product proves to be defective TEGAM Inc at its option will either repair the defective product without charge for parts and labor or exchange any product that proves to be defective TEGAM Inc warrants the calibration of this product for a period of 1 year from date of shipment During this period TEGAM Inc will recalibrate any product which does not conform to the published accuracy specifications In order to exercise this warranty TEGAM Inc must be notified of the defective product before the expiration of the warranty period The customer shall be responsible for packaging and shipping the product to the designated TEGAM service center with shipping charges prepaid TEGAM Inc shall pay for the return of the product to the customer if the shipment is to a location within the country in which the TEGAM service center is located The customer shall be respon
9. a dual voltage divider The dual secondaries of the transformer are tapped to provide the voltage ratios of an ideal resolver at 10 increments One secondary provides a voltage proportional to the sine of the selected angle and the second is proportional to the cosine The increased resolution of the decade increments is provided by two ratio transformers see Figure 4 1 Both ratio transformers are controlled by a common set of switches Transformers T3 T5 and T7 provide the additional increments for the sine voltage and all sine voltage increments are added together to form the output voltage Transformers T4 T6 and T8 provide the additional cosine increments and these increments are subtracted from the voltage supplied by transformer T2 The cosine voltage selected by contacts B and C of switch S2 supplies not only the 10 cosine increment but also supplies the input for the primary of transformer T3 The secondary of transformer T3 is tapped to provide voltage divisions corresponding to the tangents of the 1 increments Contact A of switch S3 selects a COS X TAN voltage In the example shown this voltage 4 1 is COS 40 X TAN 5 product The total voltage at contact is the sum of the voltage selected by contact D of switch S2 SIN 40 plus the COS 40 X TAN 5 product This total voltage may also be expressed as SIN 40 5 COS 5 The two arms of switch S3 A and B supply a 1 sine voltage to transformer T5 This tran
10. ck mounting proceed as follows a Remove the six screws that attach the four feet and folding support to the bottom of the instrument Re tain the screws feet and support for future use b Attach rack mount kit Part No OPT 11 using hardware provided 2 4 OPERATING POWER No operating power is required however either 115 or 26 vac excitation voltage is required during operation 2 5 INSTALLATION CHECKOUT Refer to paragraphs 5 4 through 5 7 for a checkout procedure 2 1 SECTION OPERATION 3 1 GENERAL 3 1 1 Synchro Binding Posts The color coding of the synchro binding posts and the phase relations of the output voltage relative to input voltages conform to the requirements of Military Specification MIL S 20708 To convert the terminal identifications to the Aeronautical Radio Inc ARINC system refer to Table 3 1 The conversions given in the table apply for 0 degree index reference and positive rotation reference 3 1 2 Resolver Binding Posts The color coding of the resolver binding posts and the phase relations of the output voltage relative to input voltages conform to the requirements of Military Specification MIL R 21530 TABLE 3 1 BINDING POST IDENTIFICATIONS SYNCHRO MODE COLOR CODE IDENTIFICATION ARINC SYSTEM Red R1 Black R2 Blue S1 Black S2 Yellow S3 White Case Gnd 3 2 SPECIAL PRECAUTIONS To obtain maximum accuracy observe the following precautions a Always use high qua
11. lity switches with very low contact resistance whenever it is necessary to switch the outputs b Never fuse the outputs 3 1 Do not purposely apply an unbalanced load Use No 18 tinned copper wire from the output of the standard to the load and attempt to keep the total lead length from each output pin the same Stator current should be limited to approximately one ampere for normal switch contact life and should never exceed two amperes 3 3 OPERATION To operate the standard proceed as follows a Set Es MAX OUTPUT switch to desired maximum output voltage Set TYPE switch to appropriate position Connect system or unit under test to the appropriate set of OUTPUT binding posts Connect excitation voltage to the appropriate INPUT binding posts CAUTION Do not apply 115 V to the 26 V INPUT binding post e Set in the desired angle with the decade control switches 3 2 SECTION IV THEORY OF OPERATION 4 1 RESOLVER MODE The electrical position of a resolver transmitter can be determined from the ratio of the two output voltages to each other One of the output voltages is proportional to the sine of the rotational angle and the second is proportional to the cosine At 0 the sine voltage is 0 and the cosine voltage is maximum At 45 the two voltages are equal and approach a 0 707 ratio to the maximum output voltage In the Model DSRS a transformer is placed across the input voltage and functions as
12. ng the inductance of the load g Repeat test at the decade increments Refer to Table 5 2 for the required ratios and tolerances 5 7 ANGULAR ACCURACY SYNCHRO MODE To test the angular accuracy of the synchro standard proceed as follows Connect unit into test setup as shown in Figure 5 2 Adjust phase angle voltmeter to measure in phase voltage Set the synchro standard to 0 Adjust ratio standard as required to obtain a null on the phase angle voltmeter The ratio standard shall indicate an output ratio A theoretical of 0 000000 within the limits set by A column of Table 5 3 Repeat test at the increments listed in Table 5 3 5 8 VOLTAGE OUTPUT TEST This test is performed in the Resolver mode without load using the following procedure a See Figure 5 3 for equipment setup Switch the DSRS 5DA to the RESOLVER mode of operation Set the DSRS 5DA DEGREE controls to degree settings shown in Table 5 4 Other degree settings may be added to Table 5 4 including appropriate trigometric output voltages expected Adjust the 400 Hz Power Source input voltage to exactly 115 V ac Take DVM measurements at the Resolver COS 0 and SIN 0 output terminals 54 52 51 53 respectively for each position of the MAX OUTPUT switch and for the degree settings shown in Table 5 4 The COS 0 and SIN 0 output voltages should match the voltages as shown in Table 5 4 Differences are typically less than 1 S
13. of a synchro control transmitter CX can be determined from the ratio of the stator output voltages to each other As shown in Figure 4 2 each of the three output voltages is a sine function The sine 0 voltage as derived in the resolver mode is also used as the sine 0 voltage for the synchro mode To derive the other output voltages transformers T9 and T10 are interconnected into a Scott tee arrangement as shown in Figure 4 3 The sine and cosine inputs to the transformers are derived in the same manner as for the resolver mode 4 3 DIRECT READOUT For a direct readout of angular position the quadrant switch is replaced with a 100 increment switch as shown in Figure 4 4 4 3 weibeig SPON 4 05 94n514 oSSS St LY 5 3dAL iNvuavno oT 85 45 15 95 55 vs gs 4 4 cs 6L o N 81 941 V81 91 bl Ec2 s1 s MAX 1 63 s MAX 52 s MAX SIN 0 SIN 0 120 51 0 240 Figure 4 2 Standard Synchro Control Transmitter CX Outputs COS 60 S1 SIN 0 120 SIN 0 53 57 58 OUTPUT TYPE S1 QUADRANT 51 SIN 0 240 SIN 0 120 EQUIVALENT SCHEMATIC Figure 4 3 Synchro Mode Simplified Diagram 4 5 J Z L 3 Z lt I Z lt onma Acuze RS SS SWITCH 01 SWITCH 0001 SW
14. r to Table 1 1 for the Model DSRS 5DA specifications 1 2 Table 1 1 MODEL DSRS 5DA SPECIFICATIONS Angular Range 0 to 360 continuous Angular Accuracy 2 seconds of arc at nominal frequency Angular Increments 0 0001 Excitation Voltage 115 or 26 vac Frequency 400 to 800 Hz Output Es MAX 115 90 26 and 11 8 volts Maximum Effective Output Impedance Unbalance 115 and 90 volts 0 05 j 005 ohms 26 and 11 8 volts 0 01 j 001 ohms Dimensions Bench Operation 17 wide 5 7 8 high including feet 16 7 8 deep including handles Rack Mounted 15 1 8 deep from back of ears to end of back panel terminals 19 wide 5 1 4 high Weight 33 105 1 3 SYSTEM REFERENCE Figure 1 2 Typical Test Setup Synchro Mode 000000 REFERENCE Figure 1 3 Typical Test Setup Resolver Mode 1 4 SECTION INSTALLATION 2 1 UNPACKING No special handling or unpacking procedures are required After unpacking inspect units for any evidence of damage 2 2 BENCH OPERATION The DSRS 5DA is shipped ready for use as a bench operated instrument A folding support that is attached to the feet under the front of the instrument may be pulled down to elevate the front of the instrument for ease of operation 2 3 RACK MOUNTING A set of adapter brackets and attaching screws Option 11 permits mounting of the DSRS 5DA into a standard 19 inch rack To prepare the instrument for ra
15. sformer is tapped to approximate the 1 sine increments Contact A of switch S4 therefore selects a 1 sine voltage which is added to the voltage supplied from contact A of switch S3 The addition process continues until the final 001 is selected by switch S6 The cosine voltage is developed in approximately the same manner Since the sine voltage input to transformer T4 is inverted the voltages selected from the cosine ratio transformers are subtracted In the example shown the voltage of contact C of switch S3 is equal to COS 40 SIN 40 X TAN 5 This total voltage may also be expressed as COS 40 5 COS 5 The voltage ratios repeat every 90 however the mathematical signs of the ratios or change for each quadrant Switch S1 changes the signs by inverting the voltages Transformer in the input circuit performs two functions first it operates as an autotransformer to step up a 26 volt input and second it corrects for variations in transformation ratio In the method used to derive the sine and cosine voltages the transformation ratio varies over any 10 increment The input voltage is varied by a separate arm of switch 53 to compensate for this variation 4 2 the resolver mode transformers T9 and T10 operate as step down transformers to allow formers to allow selection of the maximum output voltages Es MAX This selection is accomplished through switch S7 4 2 SYNCHRO MODE The electrical position
16. sible for paying all shipping duties taxes and additional costs if the product is transported to any other locations Repaired products are warranted for the remaining balance of the original warranty or 90 days whichever period is longer Warranty Limitations The TEGAM Inc warranty does not apply to defects resulting from unauthorized modification or misuse of the product or any part This warranty does not apply to fuses batteries or damage to the instrument caused by battery leakage Statement of Calibration This instrument has been inspected and tested in accordance with specifications published by TEGAM Inc The accuracy and calibration of this instrument are traceable to the National Institute of Standards and Technology through equipment which is calibrated at planned intervals by comparison to certified standards maintained in the laboratories of TEGAM Inc Contact I nformation TEGAM INC 10 TEGAM WAY GENEVA OHIO 44041 PH 440 466 6100 FX 440 466 6110 EMAIL sales tegam com TABLE OF CONTENTS SECTION PAGE GENERAL DESCRIPTION Sy et ex M ts ta dee lle vas 1 1 lI INSTALEATION TE Ee spa k na ER ER 2 1 E 3 1 IV THEORY OF ON terrse yn ede E Ee mh Re ERU ARE MS M NEA 4 1 LIST OF TABLES TABLE TI TLE PAGE 1 1 SPECIFICATIONS tuy a ex ER EXER
17. teps a through e may be repeated using 26 V to the 26 V R4 R2 input terminals 5 3 NOTE Connected for measurements between 0 and 40 For remaining measurements connect as follows 11355 5175 51 5 5 s 220 5 s 52 51 225 o 2657 sa sa 53 5 208 o9 sr 53 2 ns ass se 52 ROTOR INPUT VOLTAGE RATIO STANDARD Figure 5 1 Angular Accuracy Test Setup Resolver Mode TABLE 5 1 ANGULAR ACCURACY RESOLVER MODE CL DD Dep Tm 38 sona o m m m is se poem 09 om ue oe n eee e _ m me we 9 m os pom oe me pe aman o zeae 5 4 TABLE 5 2 ANGULAR ACCURACY DECADE INCREMENTS RESOLVER MODE ANGULAR THEORETICAL MAXIMUM ANGULAR THEORETICAL MAXIMUM SETTING RATIO DEVIATION SETTING RATIO DEVIATION os 00104724 000097 _ 00139685 00000097 00157083 0 0000097 _ 7717 0 0000097 2 010349208 60000097 020 0 0000097 _ 4 010559268 0000098 oos 00000098 oos 0 0010472 ooo 6 9105109 90
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