Table of contents
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
13
7
Functions ............................................................................................................................................ 335
7.1
Section content ..................................................................................................................... 335
7.2
Inverter control ...................................................................................................................... 335
7.2.1
Switching the motor on and off ............................................................................................. 335
7.2.2
Two-wire control, method 1 .................................................................................................. 338
7.2.3
Two-wire control, method 2 .................................................................................................. 339
7.2.4
Two-wire control, method 3 .................................................................................................. 340
7.2.5
Three-wire control, method 1 ................................................................................................ 341
7.2.6
Three-wire control, method 2 ................................................................................................ 342
7.3
Setpoints ............................................................................................................................... 343
7.3.1
Analog input as setpoint source ............................................................................................ 344
7.3.2
Specifying the setpoint via the fieldbus................................................................................. 344
7.3.3
Motorized potentiometer as setpoint source ......................................................................... 345
7.3.4
Fixed speed as setpoint source ............................................................................................ 347
7.4
Setpoint calculation ............................................................................................................... 349
7.4.1
Overview of setpoint processing ........................................................................................... 349
7.4.2
Invert setpoint ....................................................................................................................... 349
7.4.3
Enable direction of rotation ................................................................................................... 350
7.4.4
Minimum speed ..................................................................................................................... 350
7.4.5
Skip frequency bands ........................................................................................................... 351
7.4.6
Speed limitation .................................................................................................................... 352
7.4.7
Ramp-function generator ...................................................................................................... 352
7.5
Motor control ......................................................................................................................... 356
7.5.1
Vector control or V/f control .................................................................................................. 356
7.5.2
Closed-loop speed control .................................................................................................... 357
7.5.2.1
Properties of the sensorless vector control........................................................................... 357
7.5.2.2
Select motor control .............................................................................................................. 358
7.5.2.3
Optimizing the closed-loop speed controller ......................................................................... 358
7.5.3
V/f control .............................................................................................................................. 360
7.5.3.1
Characteristics of V/f control ................................................................................................. 361
7.5.3.2
Selecting the V/f characteristic ............................................................................................. 362
7.5.3.3
Optimizing with a high break loose torque and brief overload .............................................. 363
7.6
Protection functions .............................................................................................................. 364
7.6.1
Inverter temperature monitoring ........................................................................................... 364
7.6.2
Motor temperature monitoring using a temperature sensor ................................................. 365
7.6.3
Protecting the motor by calculating the motor temperature .................................................. 368
7.6.4
Overcurrent protection .......................................................................................................... 368
7.6.5
Limiting the maximum DC link voltage .................................................................................. 369
7.6.6
Minimum DC-link voltage limit .............................................................................................. 370
7.7
Application-specific functions ................................................................................................ 374
7.7.1
Unit changeover .................................................................................................................... 374
7.7.1.1
Changing over the motor standard ....................................................................................... 375
7.7.1.2
Changing over the unit system ............................................................................................. 376
7.7.1.3
Changing over process variables for the technology controller ............................................ 377
7.7.2
Energy-saving display ........................................................................................................... 378
7.7.3
Braking functions of the converter ........................................................................................ 380
7.7.3.1
Electrical braking methods .................................................................................................... 380
7.7.3.2
DC braking ............................................................................................................................ 380
7.7.3.3
Dynamic braking ................................................................................................................... 383
Содержание SINAMICS G120P
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Страница 8: ...Preface Inverter cabinet units 8 Operating Instructions 12 2014 A5E32923362A ...
Страница 16: ...Table of contents Inverter cabinet units 16 Operating Instructions 12 2014 A5E32923362A ...
Страница 255: ...Operation 6 8 Communication via RS485 Inverter cabinet units Operating Instructions 12 2014 A5E32923362A 255 ...
Страница 432: ...Application examples Inverter cabinet units 432 Operating Instructions 12 2014 A5E32923362A ...
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