Lenze 8400 motec User Manual Page 126
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5 Motor control (MCTRL)
5.8 Sensorless vector control (SLVC)
126
Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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5.8.5 Remedies for undesired drive behaviour
Drive behaviour Remedy
Deviation between no-load current and magnetising
current or bad speed or torque accuracy.
Adapt the motor magnetising inductance (C00092
) for
no-load operation.
• If the no-load current is greater than the magnetising
current (C00095
) at 0.5-fold rated motor speed, the
magnetising inductance must be reduced until the
no-load current and the magnetising current have the
same values.
• Otherwise, the magnetising inductance must be
increased.
Tendency of the correction of C00092:
PN: Rated motor power
Insufficient speed constancy at high load: Setpoint and
motor speed are not proportional anymore.
Caution: Overcompensation of the settings mentioned
under " Remedy" may result in unstable behaviour!
Via the slip compensation (C00021
), the speed stability
under high loads can be affected:
•If n
act
> n
slip
, reduce the value in C00021
•If n
act
< n
slip
, increase the value in C00021
Unstable control with higher speeds. • Check the setting of the magnetising inductance
(C00092
) by comparing the current consumption in
no-load operation with the rated magnetising current
(C00095
).
• Optimise oscillation damping (C00234
).
"Short circuit" (OC1) error messages at short acceleration
time (C00012
) in proportion to the load (controller
cannot follow the dynamic processes).
Increase the acceleration (C00012
)/deceleration (
C00013
) time.
Mechanical resonance at certain speeds. The L_NSet_1
function block masks out those speed
ranges that include resonance.
Speed variations in no-load operation for speeds > 1/3
rated speed.
Minimise speed oscillations with oscillation damping
(C00234
).
Drive runs unstable. Check set motor data (nameplate data and equivalent
circuit diagram data).
Motor selection/Motor data
( 82)
Setpoint speed and actual speed differ strongly.
0,37
22
90
C0092
-15 %
+15 %
0
P [kW]
N
- Inverter 1
- Contents 3
- Danger! 10
- 1 About this documentation 11
- Pictograph and signal word! 14
- ( 199) 18
- Category 25
- Subcategories 25
- Danger! 27
- 2.5 Device identification 29
- 3 Commissioning 30
- 4 Device control (DCTRL) 58
- Power on 69
- Bit 11 Bit 10 Bit 9 Bit 8 71
- 5 Motor control (MCTRL) 100
- How to set the V 102
- Value Unit 103
- DIS code 104
- C00830/4 104
- C00830/5 104
- Efficiency_max 106
- Rated, motor 133
- Rated, FI 133
- ≤ rated motor torque 154
- FreqIn12 158
- Speed controller/ 158
- All data in [1/min] 162
- (Lenze setting) 171
- 6 I/O terminals 181
- (from version 02.00.00) 184
- $SSOLNDWLRQ 192
- $QWULHEVVFKQLWWVWHOOH 192
- $SSOLFDWLRQ 192
- 7 Technology applications 199
- (C00830/7) 204
- (C00830/6) 204
- (C00830/9) 204
- (C00050) 204
- TorqueMotLim 206
- TorqueGenLim 206
- 0.5 %0.5 % 210
- 7.3.5 Internal signal flow 236
- 7.4.1 Functional principle 240
- &75/ 241
- 8Basic functions 262
- Feedforward 282
- Start value 282
- ( 297) 283
- ( 289) 283
- ( 293) 283
- 9.2 LED status display 284
- ( 58) 286
- ( 69) 286
- ( 300) 287
- 9.5 Logbook 289
- 9.5.1 Functional description 289
- ( 290) 290
- 9.6 Monitoring 291
- 9.7 Maloperation of the drive 294
- 9.8.1.1 Error type 297
- 9.8.1.2 Error subject area 298
- 9.8.1.3 Error ID 298
- 814Bit15 07 300
- 9.8.3 Reset error message 301
- 9.8.4 Short overview (A-Z) 302
- 10 Communication 318
- )LHOGEXV 320
- &RPPXQLFDWLRQPRGXOH 320
- 0&,LQWHUIDFH 320
- /3B1HWZRUNB,Q 322
- /3B1HWZRUNB2XW 323
- 11 Parameter reference 324
- Parameter 326
- Data type: _______ 326
- Index: _______ 326
- Data type: UNSIGNED_8 331
- Index: 24573 331
- Data type: UNSIGNED_16 335
- Index: 24568 335
- C00026/1 336
- 11.2 Parameter list 337
- 11.2 Parameter list 338
- Data type: INTEGER_16 339
- Analog terminals 339
- C00026/2 0.0 % AIN2: Offset 339
- 11.2 Parameter list 340
- 11.2 Parameter list 341
- 11.2 Parameter list 342
- 11.2 Parameter list 343
- 11.2 Parameter list 344
- 11.2 Parameter list 345
- 11.2 Parameter list 346
- 11.2 Parameter list 347
- 11.2 Parameter list 348
- 11.2 Parameter list 349
- 11.2 Parameter list 350
- 11.2 Parameter list 352
- 11.2 Parameter list 353
- 11.2 Parameter list 361
- 11.2 Parameter list 362
- 11.2 Parameter list 363
- 11.2 Parameter list 364
- 11.2 Parameter list 365
- 11.2 Parameter list 366
- 11.2 Parameter list 367
- 11.2 Parameter list 368
- 11.2 Parameter list 370
- 11.2 Parameter list 371
- 11.2 Parameter list 372
- Index: 24150 373
- 11.2 Parameter list 376
- 11.2 Parameter list 377
- 11.2 Parameter list 378
- 11.2 Parameter list 380
- 11.2 Parameter list 383
- 11.2 Parameter list 384
- 11.2 Parameter list 385
- 11.2 Parameter list 386
- 11.2 Parameter list 387
- Index: 23954 389
- 11.2 Parameter list 392
- Index: 23875 393
- Index: 23874 394
- 11.2 Parameter list 395
- 11.2 Parameter list 396
- 11.2 Parameter list 397
- 11.2 Parameter list 398
- 11.2 Parameter list 399
- Index: 23742 401
- 11.2 Parameter list 403
- 11.2 Parameter list 404
- 11.2 Parameter list 405
- 11.2 Parameter list 406
- 11.2 Parameter list 407
- 11.2 Parameter list 408
- 11.2 Parameter list 409
- 11.2 Parameter list 410
- 11.2 Parameter list 411
- 11.2 Parameter list 412
- 11.2 Parameter list 413
- Index: 21993 423
- 11.2 Parameter list 424
- 11.2 Parameter list 427
- 11.2 Parameter list 428
- 12 Function library 438
- /B03RWB 439
- Data type 440
- /B16HWB 443
- /B3&75/B 450
- (from version 04.00.00) 452
- C00701/29 471
- C00701/28 471
- C00701/31 473
- C00701/30 473
- /B-RJ&WUO([WHQVLRQB 474
- /6B&RQYHUWB 478
- /6B'LJLWDO,QSXW 480
- /6B&RQYHUWB 481
- /6B&RQYHUWB 483
- /6B'LJLWDO2XWSXW 486
- C00136/1 491
- C00833/14 491
- C00833/15 491
- C00833/16 ... 22 491
- /6B6HW(UURUB 497
- /6B:ULWH3DUDP/LVW 500
- /starter 501
- 13 Application examples 502
- )(('%$& 516
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