Lenze DSD User Manual Page 368
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12 Components in the DC bus
12.6 Brake resistor selection
368
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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12.6 Brake resistor selection
The conversion of excess energy from the DC bus into thermal energy is required in order to prevent
the DC bus voltage from rising into the overvoltage range during the braking phase and thus inhib-
iting electrical braking.
• Options to dissipate or convert excessive energy:
• Feedback into the supply network via a regenerative power supply module.
• Conversion into heat via a brake resistor.
• Storage of the energy within an energy store (e. g. capacitor bank; use is rather uncommon).
• Even if there is no regenerative power, excessive energy must be dissipated, if any. In the event
of an emergency stop, for instance, the deceleration time must be longer than during normal
operation.
The following Lenze components have an integrated brake transistor which can be connected to the
brake resistor. For these components, brake resistors can be selected in DSD.
• Servo Drives 9400
• 9400 power supply module
• 9400 regenerative power supply module
• i700 power supply module
• Inverter Drives 8400
• Inverter Drives 8400 protec
• Inverter Drives 8400 motec
12.6.1 Number of integrated brake transistors
In the "Dimensioning multi-axis system" application, multiple power supply systems or regenera-
tive power supply systems connected in parallel can be selected. The number of brake transistors is
displayed for information purposes.
Danger!
Brake resistors may become very hot. Hence, the function of the brake resistor needs to
be monitored.
• In the event of an error, a mains contactor must separate the inverter or the DC bus
from the feeding supply system!
• Due to fire hazard, keep a sufficiently high safety distance between the brake resistor
and its adjacent components!
Parameter Unit Description
Met Imp
N Number of the regenerative power supply modules con-
nected in parallel with one integrated brake transistor
each.
• The selected brake resistor or the interconnection of
multiple brake resistors must be considered for every
module.
•Read only.
- Drive Solution 1
- Designer 1
- Contents 10
- 1 Notes on usage 11
- 2 About this documentation 14
- Pictograph and signal word! 17
- 3User interface 18
- How to sort the results: 35
- How to filter results: 35
- How to open created notes: 38
- How to delete notes: 38
- 4.3.1 Messages 44
- 4.3.2 Software updates 45
- 4.4 Language 46
- 4.5 Settings 46
- 4.5.3 "Help" tab 47
- 4.5.5 "Units" tab 48
- User data 50
- Registration data: 50
- 4.6 User-specific settings 51
- 4.6.1 User-defined defaults 51
- 5Managing projects 52
- 6 Drive dimensioning tools 55
- 7Applications 100
- Mass calculator ( 405) 109
- Danger! 122
- Pole pair 191
- 8 Motion design 224
- symbol in the toolbar 225
- CINH = 1 271
- 9 Mains and environment 277
- ( 283) 282
- ( 285) 282
- ( 286) 282
- 10.1 Mechanical drive axis 283
- 10.1.1 Lenze gearbox 283
- 10.1.3 Feedback 284
- 10.2 Electrical drive axis 285
- 10.3 Drive concept 286
- 10.3.1 Gearbox features 287
- 10.3.1.1 Axial gearbox 287
- 10.3.1.2 Right-angle gearbox 288
- 10.3.2 Motor properties 289
- 10.3.4 Inverter properties 294
- 10.3.4.1 Frequency inverter 294
- 10.3.4.2 Servo inverters 296
- 11 Drive Dimensioning 308
- 12 Components in the DC bus 361
- 13 Details on Lenze products 377
- 14 Energy efficiency 378
- 15.1 Drawing 386
- Editing functions 389
- 15.2 Results 390
- 15.3 Protocols 391
- 15.3.1 Summarised protocol 391
- 15.3.2 Detailed protocol 391
- 15.3.3 Commissioning data 392
- 15.3.5 Output settings 393
- 15.4.1 Application Tuner 394
- 15.4.3 BlueGreen 394
- ( 378) 395
- 15.6.1 Dynamic reserves 396
- 15.6.2 Stationary reserves 396
- 15.6.3 Speed reserves 397
- 15.6.7 Reserves for gearboxes 399
- 16 Auxiliary means 401
- How to call the calculator: 404
- How to call the DSC: 425
- 17.1 Field weakening 426
- 17.5 Feedback systems 427
- Measured values 430
- 17.16 System disturbances 435
- [17-6] Group drives 436
- 17.19 ATEX for gearbox 437
- 17.21 Emergency-off scenarios 438
- 18.1 Applications 441
- 18.2 Drive system 445
- 18.3 Additional drive element 449
- 18.4 Lenze gearbox 450
- 18.5 Lenze motor 455
- 18.5.6 Motor speed too low 456
- > as winding ratio q 460
- 18.6 Brake 461
- 18.6.3 No brake available 461
- 18.7 Feedback 463
- 18.7.2 No feedback selected 463
- 18.8 Inverters 465
- 18.8.16 Activate VVC control 469
- 18.8.19 Mains choke required 470
- 18.10 Supply module 476
- 18.11 Brake chopper 479
- 18.12 Brake resistor 481
- 18.13 User motor 483
- ( 42) 485
- ( 46) 485
- 20 Glossary 486
- )(('%$& 494
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