Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Uživatelský manuál Strana 166
- Strana / 202
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
10-4
Reference
Torque and Horsepower (cont.)
Full-load Torque (FLT)
The full-load torque of a motor is the torque necessary to produce its
rated horsepower at full-load speed. In foot-lbs, it is equal to the rated
horsepower, multiplied by 5250, divided by the full-load speed in
RPM.
In addition to the relationship between speed and torque, the
relationship of current draw to these two values is an important
application consideration. The speed/torque curve is repeated below,
with the current curve added, to demonstrate a typical relationship.
Figure 10.3 Speed Torque Curve with Current Curve
Two important points on this current curve require explanation.
Full-load Current
The full-load current of an induction motor is the steady-state current
taken from the power line when the motor is operating at full-load
torque with rated voltage and rated frequency applied.
Locked-rotor Current
Locked-rotor current is the steady state current of a motor with th
rotor locked and with rated voltage applied at rated frequency.
NEMA has designed a set of code letters to define locked-rotor:
Kilovolt-amperes-per-horsepower (kVA/HP). This code letter
appears on the nameplate of all AC squirrel cage induction motors.
%
of
Full
Load
Torque
Pull Up Torque - PUT
Locked Rotor
Current
Breakdown Torque - BT
Synchronous Speed
Slip
Full-load Torque - FLT
Full Speed
Locked Rotor
Torque - LRT
Full-load Current
- Application 1
- Please Read! 2
- Important User 2
- Information 2
- Table of Contents 3
- SMC Controllers 8
- Chapter 1 9
- Modes of Operation 10
- Adjustments 11
- Features 11
- Wiring Diagrams 12
- Suitable Replacement 14
- Applications 14
- Applications (cont.) 15
- SMC-2 Smart Motor Controller 20
- Modes of Operation (cont.) 21
- Current Limit Level 24
- Time Select 24
- Adjustments (cont.) 25
- Wiring Diagram 26
- Soft Stop Option 27
- Options (cont.) 29
- Chapter 3 38
- Starting Methods 39
- Current Limit Start 40
- Dual Ramp Start 40
- Starting Methods (cont.) 41
- Electronic Overload 42
- Built-in Communication Port 42
- Features (cont.) 43
- Phase Rebalance 44
- Metering 44
- Fault Indication 44
- Control Terminal Description 46
- Typical Wiring Diagrams 52
- (without options) 52
- (without options) (cont.) 55
- Control Options 56
- Control Options (cont.) 57
- Pump Control Option 60
- Stopping follows: 62
- Preset Slow Speed Option 64
- Speed Option follows: 66
- Customer supplied 70
- Smart Motor 72
- Accu-Stop Option 74
- Capability 80
- Plus Controller 83
- Tow Chain 93
- Exhaust Intake 95
- 1-1/2 HP 96
- 480 Volts 102
- Centrifuge 102
- Gearbox Motor 102
- Gearbox 103
- 575 Volts 104
- 240 Volts 109
- Bundle Bundle 113
- Windshields 114
- 230 Volts 116
- Motor Motor 116
- Die Die 116
- ~~~~~~~~~~~~~~~~~ 122
- Application Considerations 125
- Use of Protective Modules 126
- Current Limit Fuses 127
- Motor Overload Protection 128
- Stall Protection and 129
- Jam Detection 129
- Built-in SCANport 129
- Communications 129
- Power Factor Capacitors 130
- Multi-motor Applications 132
- Part Winding 133
- Wound Rotor 133
- Synchronous 133
- Altitude De-rating 134
- Isolation Contactor 134
- SMC Dialog Plus Controller 135
- Winding Heater 137
- Motor Torque Capabilities 138
- Controller Options 138
- Accu-Stop 139
- Energy Saver Operation 139
- Energy Saver (cont.) 140
- Application Requirements 141
- Preliminary Estimates 141
- Chapter 6 143
- Mining and Metals 144
- Food Processing 145
- Pulp and Paper 146
- Petrochemical 147
- OEM Specialty Machine 149
- Lumber and Wood Products 150
- Water/Wastewater 151
- Treatment and Municipalities 151
- Design Philosophy 152
- Reduced Voltage Starting 154
- Reduced Voltage 155
- Design B Motors 156
- Reduced Voltage (cont.) 157
- Solid-state 159
- Chapter 9 161
- Solid-state Starters 162
- Using SCRs (cont.) 162
- Reference 163
- Torque and Horsepower (cont.) 164
- Locked-Rotor Torque (LRT) 165
- Pull-Up Torque (PUT) 165
- Breakdown Torque (BT) 165
- Motor Output for 169
- NEMA Design Designations 169
- Polyphase 1–500 HP 169
- Polyphase 1–500 HP (cont.) 170
- Calculating Torque 173
- (Acceleration Torque 173
- Required for Rotating Motion) 173
- ---------------------------= 174
- -----------= 174
- Torque Formulas 175
- AC Motor Formulas 176
- Torque Characteristics on 177
- Common Applications 177
- Common Applications (cont.) 178
- Electrical Formulas 179
- Calculating Motor Amperes 180
- Other Formulas 181
- Engineering Constants 181
- Engineering Constants (cont.) 182
- Conversion Factors 185
- Conversion Factors (cont.) 186
- ---------------------= 187
- Glossary 188
- Glossary-2 189
- Glossary-3 190
- Glossary-4 191
- Glossary-5 192
- Glossary-6 193
- Glossary-7 194
- Glossary-8 195
- Glossary-9 196
- Glossary-10 197
- Glossary-11 198
- Glossary-12 199
- Glossary-13 200
- Glossary-14 201
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