Rockwell-automation 7000 PowerFlex Medium Voltage (B Frame) Commission Manual de usuario Pagina 15
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Rockwell Automation Publication 7000-IN006B-EN-P - May 2013 11
PowerFlex 7000 Overview Chapter 2
Motor Compatibility
The PowerFlex 7000 achieves near-sinusoidal current and voltage waveforms to
the motor, resulting in no significant additional heating or insulation stress.
Temperature rise in the motor connected to the VFD is typically 3 °C (5.5 °F)
higher compared to across-the-line operation. Voltage waveform has dv/dt of less
than 10 volts per microsecond. The peak voltage across the motor insulation is
the rated motor RMS voltage divided by 0.707.
Reflected wave and dv/dt issues often associated with voltage source inverter
(VSI) drives are a non-issue with the PowerFlex 7000. Figure 1
shows typical
motor waveforms. The drive uses a selective harmonic elimination (SHE) pattern
in the inverter to eliminate major order harmonics, plus a small output capacitor
(integral to the drive) to eliminate harmonics at higher speeds.
Standard motors are compatible without de-rating, even on retrofit applications.
Motor cable distance is virtually unlimited. Rockwell Automation has tested this
technology for controlling motors up to 15 km (9.3 miles) away from the drive.
Figure 1 - Motor waveforms @ full load, full speed
300.00
200.00
100.00
0.00
-100.00
-200.00
-300.00
10.00K
7.50K
5.00K
2.50K
0.00K
-2.50K
-5.00K
-7.50K
-10.00K
100.00
110.00
120.00 130.00
TIME (ms)
140.00
150.00
Arms
Vrms
CURRENT
VOLTAGE
- (“B” Frame)—ForGe Control 1
- Important User Information 2
- Summary of Changes 3
- New and Updated 3
- Information 3
- Summary of Changes 4
- Table of Contents 5
- Chapter 4 6
- Chapter 5 6
- Manual Conventions 10
- General Precautions 10
- Commissioning Support 11
- PowerFlex 7000 Overview 13
- Rectifier Designs 14
- Motor Compatibility 15
- Simplified Electrical 16
- Diagrams 16
- 3300/4160V with AFE Rectifier 17
- 6600 V with AFE Rectifier 18
- Operator Interface 19
- Chapter 3 21
- Terminology 21
- Function (Softkeys) Keys 23
- Cursor (Selection) Keys 23
- Data Entry Keys 23
- Screen Components 24
- ▲or▼ keys 25
- Information Windows 26
- Accessing/Writing to Drive 26
- Communication Errors 26
- Operator Interface Menu 27
- Figure 13 - Menu hierarchy 29
- Configuring the Interface 31
- Top-Level Menu 32
- Accessing the Help Function 32
- “SOFTKEYS”. To view this 33
- Changing Backlight Delay 34
- ▲ or ▼ to change 35
- Setting Date 36
- Selecting Meters 36
- Figure 25 - Editing text 38
- Figure 26 - Editing complete 38
- Software Revision Levels 39
- Transfer Data in Memory 40
- Changing Language 41
- Commissioning Preparations 43
- Commissioning Preparation 45
- Additional Required 46
- Resources 46
- Important Note for the 47
- Commissioning Engineer 47
- Commissioning the Drive 49
- Drive Application Review 51
- Inspection Process 52
- Safety Tests 53
- Lockout Tagout 53
- Installation Review 54
- Protective Barriers 55
- Component Grounding 55
- Information on Splice Kits 55
- Power Cabling 55
- Control Wiring 56
- Service Data 57
- Control Power Off Tests 58
- Placegreaseon 59
- Resistance Checks 60
- SGCT Testing 60
- Measure resistance 63
- Snubber test point 63
- Measure capacitance 64
- SCR Sharing Resistance Test 67
- Gate-to-Cathode Resistance 68
- Disconnect SCR Phoenix 68
- Three-Phase Input 71
- Power Supply Tests 72
- Circuit Board Healthy Lights 72
- AC/DC Converter (PS1) 73
- DC/DC Converter (PS2) 74
- SGCT Power Supplies (IGDPS) 76
- Gating Tests 79
- ▼to scroll to 80
- ▼to scroll to Operating Mode 80
- Test power connection 81
- SGCT Firing Test 82
- System Test 83
- Start/Stop Control Circuit 84
- Status Indicators 85
- Analog I/O 85
- Analog Outputs 86
- 18-Pulse Phasing Test 88
- Application of Medium Voltage 90
- Configuring Trending 91
- Input Phasing Check 93
- Tuning Procedure 96
- Rectifier 97
- Input Impedance Manual Tuning 98
- Idc Reference 100
- Idc Feedback 100
- Motor Impedance 101
- Flux Regulator 103
- Speed Regulator 103
- SlipRated 105
- Speed Error 106
- Calculating Total Inertia 107
- Running the Load 111
- Capturing Data 113
- Sample Waveforms 114
- Harmonic Analysis (required 115
- DC Current Test 116
- Load Test 118
- Synchronous Transfer 119
- Bypass Contactor Closures 120
- Live Synchronous Transfer 121
- General Reference 123
- Preventative Maintenance 124
- Schedule 124
- Tachometer Usage 124
- PowerFlex 7000 Drive 125
- Performance (Torque 125
- Capabilities) 125
- Glossary of Terms 126
- Appendix B 129
- Capturing Drive Data 129
- Uploading Control Data 136
- Specifications 141
- Appendix C Specifications 142
- Specifications Appendix C 143
- History of Changes 145
- Rockwell Automation Support 148
- Documentation Feedback 148
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