Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 9)

Table of Contents vii
7000 “A” Frame 7000A-UM150F-EN-P – June 2013
Chapter 5 Functional Description
Introduction .............................................................................. 5-1
Description of Operation ......................................................... 5-2
Speed Command ...................................................................... 5-3
Speed Reference ...................................................................... 5-4
Speed Control .......................................................................... 5-6
Flux Control ............................................................................. 5-8
Flux Control for Synchronous Motor .................................... 5-10
Current Control ...................................................................... 5-12
Line Converter Feedback ....................................................... 5-14
Machine Converter Feedback ................................................ 5-15
Motor Model .......................................................................... 5-16
Line/Machine Converter Protection ....................................... 5-18
Power Semiconductor Diagnostics ........................................ 5-19
Off-line Detection of Failed SCRs/SGCTs ..................... 5-20
Line Converter .......................................................... 5-20
Machine Converter ................................................... 5-22
On-line Detection of Failed SCRs/SGCTs ...................... 5-23
Test Modes ............................................................................. 5-24
Flying Start (Induction Motor) ............................................. 5-26
Flying Start (Synch Motor) .................................................... 5-28
Tachometer/Encoder Option .................................................. 5-28
Synchronous Transfer ............................................................ 5-29
Transfer to Bypass ........................................................... 5-31
Transfer to Drive ............................................................. 5-34
Analog Outputs ...................................................................... 5-35
Chapter 6 Component Definition
Cabling Cabinet for Base Drive ............................................... 6-1
And Maintenance
Cabling Cabinet with Integral Isolation Transformer .............. 6-2
Cabling Cabinet with Integral Line Reactor & Input Starter ... 6-3
Cabling Cabinet with Integral Line Reactor, without Starter .. 6-4
Hall Effect Sensor Replacement .............................................. 6-5
Current Transformer Replacement .......................................... 6-6
Converter Cabinet Components ............................................... 6-7
Converter Cabinet .................................................................... 6-8
Voltage-Sensing Assembly ...................................................... 6-8
Voltage-Sensing Circuit Board Assembly Replacement .... 6-9
Transient Suppression Network (TSN) .................................. 6-10
MOV Suppressor ............................................................. 6-10
MOV Fuse ....................................................................... 6-11
Simplified Wiring Diagrams .......................................... 6-12
Transient Suppression Network Fuse Replacement ........ 6-13
Varistor Replacement ...................................................... 6-14
PowerCage™ ......................................................................... 6-15
SGCT and Snubber Circuit .................................................... 6-18
Uniform Clamping Pressure .................................................. 6-19
Checking Clamping Pressure ................................................. 6-19
Clamping Pressure Adjustment ....................................... 6-20