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TR TASC Unit Selection Guide

As a market leader in thedesign and manufacture ofinnovative and durable drivesand control systems, thecompany has built a reputationas a supplier of reliable, robystand cost effective solutions toproblems in the control ofindustrial processes, both inthe UK and worldwide.

The company's uniqueexperience and expertiseprovides an unrivalled level ofservice and back-up for allindustrial applications. A wideproduct portfolio includes theOulton Switched ReluctanceDrive, NECO DC & AC Motors,Electropower Gears, PrecisionStep Systems, DISCO & SupaflexDrives, EDC Traction Motors andGlentronic Phase Converters,The industry standard TR TASCUnit eddy current drive unit isdescribed in this publication.

The compact 4200 Controller.

VTR TASC UNITThe TR TASC Unit is a friction-free eddy current couplingwhich provides infinitelyvariable torque and speed andis driven by a standard squirrelcage motor which is directlyconnected to the mains, Asimple controller, consisting ofa single electronic circuitboard, provides closed-loopspeed control by comparingthe feed-back signal from aninbuilt tachogenerator withthe set-speed demand signal.

The TR TASC Unit eddy currentcoupling is, in many respects,the most versatile drive and isavailable in various forms:-

• Variable speed output.1 Variable torque output.B Infinitely variable load

(braking),• Constant output speed with

variable input speed.

The TASC eddy current couplinghas been accepted as theindustry standard and it is verydoubtful any other drive systemis as simple, robust, inexpensiveand forgiving of abuse.Although the TR TASC Unitsdescribed in this publicationare mainly used as variablespeed drives, units areavailable which provide theoptions listed above.

CONSTRUCTIONAND PRINCIPLEOF OPERATIONA torque tube mounted on ahub incorporating a coolingfan, is driven by a motor atconstant speed. A polewheelassembly fixed to the outputshaft is free to rotate withinthe torque tube. A d.c. excitationcoil, mounted within thepolewheel assembly is suppliedfrom the secondary of arotary transformer mounted onthe shaft.

The triac output stage of theTR TASC Unit controller suppliesthe coil with variable voltageand current. A magnetic fieldis set up in the polewheel

TORQUE TUBE

POLEWHEEL ASSEMBLY

ROTARY TRANSFORMER

TACHOGENERATOR

COILMOTOR

TYPICAL CONTROLCONFIGURATION

SET-POINT

CONTROLLER

PRESSURE ERROR

SENSING

RM1002 (MANUAL)

340%

241%

100%

TYPICAL TORQUE/SPEED CURVES FOR TASCUNITS UP TO 10.3RW, 2 POLE

Starting Torques from 241% to 340%

Starting Torques Available:(340% = 100TR2/1)(241% = 132TR2/3)

100% = RATED CONSTANT TORQUE

CONTROLLED SPEED RANGE = 45:1

MOTORSPEED

RATED SPEED

inducing a voltage, andcausing eddy currents to flowin the torque tube. These eddycurrents produce their ownmagnetic field within thetorque tube which interactswith the main field andcauses the polewheel to rotatein the same direction as themotor. Torque is a function ofcoil current.

Closed-loop speed control iseffected by comparing thesignal from a tachogeneratordriven by the output shaft, witha "set-speed" reference signal.Any error, or difference,between the two signalsdetected by the speed errorsensing circuit, causes thetriac output stage to adjustthe coil current, and hencetorque to maintain set speed.

The TR TASC Unit is aheteropolar type whichproduces higher starting andrunning torques than earlierhomopolar types. Startingtorques can be as high as340% of rated torque as theTR TASC Unit eddy current driveallows the pull-out torque ofthe driving motor to be utilisedduring starting. The design ofthe TR range includes apatented rotary transformerthat allows current to reachthe main coil, which rotateswith the heteropolar polewheel,without the use of brushesand slip-rings, which needregular maintenance. As withprevious units, the TR modeldoes NOT include a centre-bearing which tends to overheatin service and have a short life.

Speed range at constanttorque is up to 45:1 andregulation, with built inclosed-loop control, is betterthan 1%. Soft- starting isstandard as the motor starts"off-load" and accelerationand deceleration rates areadjustable.

TR TASC UNITFEATURES &BENEFITS

:The TR TASC Unit eddy currentdrive is an extremely versatileconstant torque drive whichprovides outstanding infinitelyvariable control of torque andspeed, Together with itsassociated compact controller,it combines low prime costwith zero maintenance,reduced energy consumption,negligible RFI and mainsharmonics.

TR TASC UNIT CONTROLLERThe TR TASC Unit speedcontroller is a single, compactprinted circuit card, only100mm x 160mm which issuitable for the whole range ofTR TASC Units irrespective ofpower rating. It is availablesuitable for panel or rackmounting, and all customeradjustable controls are factorypreset, only requiring finetuning adjustments if necessaryon site. The control circuit isopto-isolated from the mainssupply and the controller willaccept all common inputcontrol signals.

TR TASC UNIT FEATURES

D High starting torque.D Wide speed range at

constant torque.D No routine maintenance,D Can be stalled without

damage for long periods.D High tolerance to abuse

and misuse.D Standard AC motors fitted,D Operation in any attitude,

D Guarded or hoseproofenclosures.

D Motor starts off load,reducing mains peakdemands.

D Wide range of options inflanges and gearboxes,

D Environmental options suchas 100% humidity, lowtemperature (-60°C) and

chemical works protection.D Brakes, power applied or

failsafe, can be built in.D No centre bearing, no drag

torque.D Constant cooling over

whole speed range,D Reversible drive,

PRINCIPAL DIMENSIONS OF TR INDUSTRIAL DRIVE UNITS.ALL DIMENSIONS IN MILLIMETRES EXCEPT SOME MOTOR TERMINAL BOX CONDUIT HOLES (KL).

TASC UNITDERIVATION

MOHFI

90TR 2/0

90TR 2/290TB 2/390TR 4/09DTR 4/190TR 4/2

OOTR 2/1OOTR 2/2OOTR 4/1OOTR 4/2

32TR 2/132TR 2/232TG 2/332TR 4/132TR 4/232TR 4/3

60TR 2/160TR 2/260TR 2/360TR 4/160TR 4/280TR 4/2'60TR 4/360TR 4/3'

80TR 2/180TB 2/280TR 2/380TFU/11080TR 4/15080TR 4/1BOTR 4/1*BOTR 4/2BOTR 4/2'

225TR4/185225TR 4/220225TR 4/1225TR4/T225TR 4/2225TR 4/2'225TR W

TASC UNIT FIXING DIMENSIONSUS1C BRAKE

A B C C H 0K LA M 0N 0P 0S T

160 100 147 227 90 12 12 165 130W 200 12 3.5

170 112 147 252 100 12 12 165 1 301)7 200 12 3.5

132132

240 120 215 215 160' 12 12 215 180H7 250 15 4132132132

160160180

340 120 213 238 160 15 16 30D 250h7 350 19 5160160160160

200200'

2001

19G'

340 140 214 239 180' 15 16 300 250 W 350 19 5180180180

225'

225'

225''440 230 197 332 225' 19 20 400 350fi8 450 19 5

225225225

OUTPUT SHAFT

D DA EB E F 6 U Z

19J6 M6 12 40 6 15.4 6 25

19)6 M6 12 40 6 15.4 6 25

28]6 MS 16 60 8 23,8 7 40

42k6 M16 30 110 12 37 8 80

48k6 M16 30 110 14 42.5 9 80

60m6 M20 35 140 18 53 11 100

INPUT SHAFT CODE K

DD DDA EEB EE FF G6 UU 5

19J6 M6 12 40 6 15.4 6 25

19J6 M6 12 40 6 15.4 6 25

28J6 MB 16 60 8 24.0 4028J6 MB 16 60 8 24.0 40381(6 M12 25 SO 10 33,0 562BJ6 MB 16 60 8 24,0 4028J6 MB 16 60 8 24.0 403Bk6 M12 25 60 10 33.0 8 56

38k6 M12 25 80 0 33.0 8 5638k6 M12 25 80 0 33.0 8 5648K6 M16 30 110 4 42.5 9 8038K6 M12 25 80 0 33.0 8 5638k6 Ml 2 25 80 0 33.0 8 5638k6 M12 25 80 0 33.0 8 5648k6 M16 30 110 4 42.5 9 8048k6 M16 30 110 4 42.5 9 80

48kB M16 30 110 14 42.5 9 80

60m6 M20 35 140 18 53 11 100

GENERAL DIMENSIONS OF TASC UNITCODfNCobn BASIC BRAKE IASIC IRAK

AB AD AE AE BB BC HA HC HO 0KK 1 L LF LF

557 637

572 652190 132 340 332 147 13.5 10 188 243 21 572 652 427 507

557 637557 637572 652

586 691210.137 361 352 159 15 10 208 263 21 641 746 441 546

586 691641 746

1 275 322 821 821 602 6021 275 322 821 821 602 602

270 174 420 432 190 34 4 303 350 21 97B 978 705 7051 275 322 751 751 602 6021 275 322 751 751 602 6021 275 322 821 821 705 705

1 333 395 1067 1092 794 0 91 333 395 1067 1092 794 8 93 353 415 1133 1158 814 8 9

380 202 482 518 155 16 1 333 395 21 924 949 794 B 91 333 395 1067 1092 794 B 91 333 395 1067 1092 794 B 91 333 395 1067 1092 814 8391 333 395 1067 1092 814 839

37 392 454 129 1322

i 37 392 454 129 1322

37 392 454 129 1322

17 372 434 109 1163801202 513 548 181 21 17 372 434 21 109 116 838 863

17 372 434 115 18217 372 434 115 18217 372 434 1157 18217 372 434 1157 182

127 1412

127 1412

131 1446

489 :242 612 NA' 283 21 25 467 549 2! 131 1446 1087 1222

141 1549

141 1549

1439 1574

MOTOR

AC AF AG AH BF BG HB HF HG HH 0KC KL

158 - - 132 - - - - 169 - - M20

178 - - 1 4 0 - - - - 179 - - M20178 - - 140 - - - - 179 - - M20158 - - 132 - - - - 169 - - M2D158 - - 132 - - - - 169 - - M20178 - - 140 - - - - 179 - - M20

178 - - 140 - - - - 189 - - M20218 - - 146 - - - - 221 - - 021 X 2178 - - 140 - - - - 189 - - M20218 - - 146 - - - - 209 - - 021 X 2

260 - - 198 - - - - 262 309 - 026X2260 - - 198 - - - - 262 309 - 026X2318 254 304 239 195.5 210 16ff 5 319 366 15 M32218 - - 146 - - - - 24! - - 021 X 2218 - - 146 - - - - 241 - - 021 X 2260 - - 198 - - - - 262 309 - 026 X 2

318 254 304 239 237 210 \tff 5 319 366 5 M32318 254 304 239 237 254 W 5 319 366 5 M32362 279 329 278 250 241 ISO

1 8 361 416 5 M32260 - - 198 - - - - 290 337 - 826X2318 254 304 239 237 210 160

1 5 319 366 5 M32318 254 304 239 237 210 16ff 5 319 366 5 M32318 254 304 239 237 254 16C

3 5 319 366 5 M32318 254 304 239 237 254 160

1 5 319 366 5 M32

400 318 382 303 265 305 2017 25 400 472 9 033/54X2400 318 382 303 265 305 200' 25 400 472 9 033/54 X 2400 318 382 303 265 305 20ff 25 400 472 9 033/54X2318 254 304 239 240 210 iff 25 340 386 5 M3231B 254 304 239 240 254 Kf 25 340 386 5 M32362 279 329 278 253 241 8ff B 361 416 5 M32362 279 329 278 253 241 8ff 8 361 416 5 M32362 279 329 278 253 279 80* 8 36! 416 5 M32362 279 329 278 253 279 80' 8 361 416 5 M32

362 279 329 278 270 241 Sff 53 406 461 5 M32362 279 329 278 270 279 8ff 53 406 461 5 M32360 318 394 2B6 282 305 20? 50 405 469 9 033/54X2360 318 394 286 282 305 2Cff 50 405 469 3 033/54X2484 356 426 380 314 286 225

1 25 467 530 3 2"484 356 426 380 314 286 225' 25 467 530 9 2"489 356 426 380 314 311 225' 25 470 530 9 2"

(90-180TR) 4 I 0S ON M PCD AT 45°

' FORCED COOLED TASC UNITS - CODE 61

"ODEl III

HJ

il

ON THE MODELS LISTED BELOW, THE MOTOR FLANGEEXTENDS BELOW THE FEET BY DIMENSION T

BB: DIMENSION ACROSS FEETBC: CENTRE OF HOLE FROM FOOT EDGE

H: TASC UNIT CENTRE HEIGHTHB: MOTOR CENTRE HEIGHT WHEN FEET

ARE FITTEDHC: TOP OF TASC UNIT HOUSINGHD: TOP OF TASC UNIT EYE BOLT

HG: TOP OFMOTOR FRAMEHH: TOP OFMOTOR EYE BOLT

0KK: CONDUT HOLE SIZEKL: CONDUT HOLE-EITHER

THREADED TO BRITISHSTANDffiO OR CLEARANCEHOLE WHERE e> SYMBOL ISGIVEN

NOTES1. 'Centre height includes foot blocks under the TASC UNIT or MOTOR to enable mounting on a flat bed (refer to

dimension'H'),2, These models are supplied with feet on the MOTOR as well as the TASC UNIT (refer to dimension 'HB').3 'AH' dimension is the distance from centre of unit to MOTOR terminal box Ed. The MOTOR terminal box is on

top on models fitted with motors up to and including frame Dl 12 (see selection guide). All other models onRHS viewed from output shaft, unless specified LHS when ordering.

4. Model 225TR is not available as standard in totally-enclosed format. For information on ducted clean-airsupply please contact our Sales Dept.

5. 'AD' dimension is the distance from centre of unit to TASC UNIT terminal box lid, The TR TASC UNIT terminalbox is supplied on top unless otherwise specified. (E3-RHS viewed from output shaft, E6-undernsath, E9-LBS).

The first two or three numbers indicate theshaft centre-height or frame size, foilowedby the letters TR (transformer, rotary}. Thenext number gives the number of poles ofthe motor and, therefore, indicates motorspeed: 2 indicates 2-pole (3000 R.P.M.nominal), 4 indicates 4-pole (1500 R.P.M.nominal) etc. The final number indicatesthe particular model. They generallyascend as the motor power increases.Controller Designation 4200 is thestandard panel mounting speed controllerfor 220/240V supplies. 4200/R is thestandard rack mounting speed controllerfor 220/240V supplies. 4100 is the 110Vsupply version of the 4200. 4100/R is the110V supply version of the 4200/R.

VARIABLE SPEED DRIVESYSTEM SELECTION GUIDE

Rated Speed The rated speed of aTASC Unit is Its maximum speed at ratedload and torque. A small speed differencebetween motor speed and TASC Unit ratedspeed exists because, like the squirrelcage motor, the TASC Unit is an inductionmachine and needs this "slip-speed"to achieve full torque. The data givenhere is for drives on 50Hz supplies. Asimilar table is available for 60Hz drives.Bated Torque The rated constant torqueof a TASC Unit is set at a level which fullyloads its drive motor. It is achieveableover the speed range and, for continuousoperation, it must not be exceeded.However, higher torques can be achievedfor short-term use such as starting,accelerating and overcoming shock loads.Starting Torques The starting torque statedis that achieved with the TASC Unit atambient temperature. Values up to 340%of rated torque are achieveable asthe motor pull-out torque can be utilisedfor starting, With the drive at its normaloperating temperature, the starting torqueis reduced slightly,Maximum Continuous Stall Torque This isthe maximum level of stall torque in anambient temperature of 35"C. If this levelof torque is Increased, the Unit will exceedthe thermal limit where short-term useonly is possible. If this level is above therated torque, then the rated torque isstated as the limit to avoid overheatingthe drive motor.Speed Range The thermal speed rangestated will not cause overheating of theTASC Unit when it Is operated continuouslyat rated torque at the stated minimumspeed. If the thermal limit of a TASC Unitis greater than the rated torque, theminimum speed is given as zero.The thermal speed range can be increasedby decreasing load torque, operating ina lower ambient temperature orincreasing the flow of cooling air.The tacho-generator fitted to theTASC Unit gives accurate closed-loop

TR TASC UNIT 2 POLE CONSTANT TORQUE DRIVES - 50HzTASCUnitModel

90TR2/090TR2/190TR2/290TR2/3

100TR2/1100TR2/2

132TR2/1132TR2/2132TR2/3

160TR2/1160TR2/2160TR2/3

180TR2/1180TR2/2180TR2/3

OutputPowerkW

0.74

1.05

1.42,1

2,93.8

5.47.3

10.3

14.0

17.0

20.0

29.0

34.5

41.6

RatedConstantTorque Nm

2.53.75.07.5

10.0

13.2

18.5

25.0

36.5

48.8

60.3

72.0

99.0

121.0148.0

StartingTorqueNm

6.910.2

16.5

17.6

34.0

34.0

48.1

65.0

88.0

130.0130,0130.0

198.0217.0217.0

Speed Range withConstant Torque (rpm)IP23 IP55

2800-0 2800-02750-0 2750-02700-0 2700-02650-0 2650-0

2700-0 2700-02650-0 2650-200

2775-0 2775-02765-0 2765-02700-0 2700-440

2765-0 2765-4002700-550 2700-8902650-930 2650-1210

2800-930 2800-13302725-1295 2725-16202685-1400 2685-1860

Induction MotorFitted to TASC Unit

kW rpm Frame

0.75 2850 D80AC1.1 2850 D80BC1.5 2850 D90SC2.2 2850 D90LC

3.0 2880 D90LLD4.0 2820 D112MC

5.5 2870 D132SAC7.5 2870 D132SBC

110 2930 D160MAD

15.0 2940 D16OMBD18.5 2950 D16OLD22.0 2920 D180MD

30.0 2945 D200LD37.0 2945 D200LD45.0 2945 D200LHD

TR TASC UNIT 4 POLE CONSTANT TORQUE DRIVES - 50HzTASCUnitModel

90TR4/090TR4/190TR4/2

100TR4/1100TR4/2

132TR4/1132TR4/2132TR4/3

160TR4/1160TR4/2160TR4/2*160TR4/3160TR4/3*

180TR4/110180TR4/150180TR4/1180TR4/1*180TR4/2180TR4/2*

225TR4/185225TR4/220225TR4/1225TR4/1*225TR4/2225TR4/2*225TR4/3*

OutputPowerkW

0.52

0.710

1.41.9

2.75

3.65

4.9

7.010,2

10,4

13.3

13.5

10.1

13.5

17.0

17.0

19.0

19.0

17.9

20.1

28.2

28.2

33.7

33.7

39.8

RatedConstantTorque Nm

3.85.17.5

10.0

14.5

20.5

27.0

37.0

49.8

72.0

72.0

97.4

97.4

72.0

97.4

124.0124.0140.0140.0

124.0140.0198.0198.0240.0240.0292.0

StartingTorqueNm

8.411.7

20.0

23.0

39.0

55.3

74.0

88.0

124.5136,0136.0136.0136.0

238.0292.0298.0298.0257.0257.0

409.0440.0440.0440.0440.0440.0440.0

Speed Range withConstant Torque (rpm)IP23 IPS5

1300-0 1300-01260-0 1260-01200-0 1200-0

1280-0 1280-01220-0 1220-100

1280-0 1280-01285-0 1285-01255-0 1255-220

1350-0 1350-601350-320 1350-5001375-01305-870 1305-10591320-375

1340-80 1340-3601320-420 1320-6501310-660 1310-8351310-01300-750 1300-9001300-200

1380-75 1380-3401370-235 1370-4701360-595 1360-7651360-01340-750 1340-8901340-601300-435

Induction MotorFitted to TASC Unit

kW rpm Frame

0.55 1400 D80AC0.75 1400 D80BC11 1420 D90SC

15 1420 D90LD2.2 1420 D100LAC

3.0 1420 D100LBD4.0 1420 D112MD5.5 1440 D132SC

7.5 1440 D132MC11.0 1460 D160MD11.0 1460 D160MD15.0 1470 D160LD15,0 1470 D160LD

110 1460 D160MD15.0 1470 D160LD18,5 1460 D180MD18.5 1460 D180MD22.0 1460 D180LD22.0 1460 D180LD

18.5 1460 D180MD22.0 1460 D180LD30.0 1460 D200LD30.0 1460 D200LD37.0 1470 D225SD37.0 1470 D225SD45.0 1470 D225MD

* FORCED COOLED - CODE 61 (50Hz Supply)

Code DescriptionA Fitted with NEMA output shaft.B Fitted with power applied or failsafe brake.C Coating of torque tube.E Terminal box in non standard position;F Range fitted.

61 Forced Cooled (50Hz).J Filters fitted to air-inlet grills.

TASC UNIT CODES OPTIONSK Input shaft assembly instead of drive

motor.L1 110V Rotary transformer in Unit.N IP55 Protection.P IP44 Protection.S Constructed for temperatures below - 30°C.T Totally enclosed.V Motor voltage specified (and C.SA).

W1 TASC Unit without motor.W2 TASC Unit with 'special' motor (to be

specified).W5 TASC Unit with IP23 protection, but with

IP55 motor.Y Thermistor fitted in rotary Transformer primary,

in airstream or both.I Special paint a primer finish.