51
SECTION 6
Applications
6-1
Applications
This chapter contains tables giving an overview of many different applications/
duties in which it is suitable to use variable speed drives from OMRON. Fur-
ther on you will find application examples of the most common applications
and solutions.
6-1-1
Cranes
6-1-2
Crushers
6-1-3
Mills
Challenge
Omron SX-F solution
Menu
Starting with heavy load is difficult and risky.
Can lead to jerks causing swinging load.
Direct torque control, fast motor pre-magnetiza-
tion and precise brake control gives instant yet
soft start with heavy load.
331–338, 339, 351
Jerky movements can cause load to be
dropped, jeopardizing safety of people and
goods.
Deviation control immediately detects load
change. Signals to parallel safety system to
activate mechanical brakes.
3AB, 3AC
Crane is driven slowly when returning empty or
with light load. Valuable time is lost.
Speed can be increased by field weakening.
343, 3AA, 3AD, 713
Braking with heavy load is difficult and risky.
Can lead to jerks causing swinging load.
Direct torque control and vector brake gradually
reduce speed to zero before mechanical brake
is activated.
213, 33E,33F, 33G
Operator starts braking long before end posi-
tion to avoid jerks. Valuable time is lost.
System automatically stops crane at end posi-
tion. Operator can safely drive at full speed.
3A2–3AA
Challenge
Omron SX-F solution
Menu
High start currents require larger fuses and
cables, or for mobile crushers larger diesel gen-
erators.
Direct torque control reduces start current.
Same fuses as those for the motor, or smaller
generator.
331-338, 351
Difficult to start with heavy load.
Possible to boost torque at start to overcome
initial torque peak.
351–353
Material that could cause damage gets into the
crusher.
Load Curve Protection quickly detects devia-
tion. Warning is sent or safety stop activated.
411–41C9
Process inefficiency due to e.g. broken feeder or
worn jaw. Wasted energy, mechanical stress,
and risk of process failure.
Load Curve Protection quickly detects devia-
tion from normal load. Warning is sent or
safety stop activated.
411–41B, 41C1–41C9
Challenge
Omron SX-F solution
Menu
High start currents require larger fuses and
cables. Cause stress on equipment and higher
energy cost.
Direct torque control reduces start current.
Same fuses can be used as those required for
the motor.
331-338, 350
Difficult to start with heavy load.
Possible to boost torque at start to overcome
initial torque peak.
351–353
Material that could cause damage gets into the
mill.
Load Curve Protection quickly detects devia-
tion. Warning is sent or safety stop activated.
411–41C9
Process inefficiency due to broken or worn
equipment. Energy wasted and risk of process
failure.
Load Curve Protection quickly detects devia-
tion. Warning is sent or safety stop activated.
411–41B, 41C1–41C9
Summary of Contents for SX-F
Page 2: ......
Page 14: ...6 Table of contents...
Page 20: ...12 Glossary Section 1 6...
Page 32: ...24 Cabinet mounting Section 2 3...
Page 58: ...50 Connecting options Section 5 6...
Page 72: ...64 Load Monitor and Process Protection 400 Section 7 5...
Page 74: ...66 EMC standards Section 8 1...
Page 266: ...258 System Data 900 Section 11 9...
Page 274: ...266 Maintenance Section 12 3...
Page 284: ...276 Liquid cooling Section 13 12...
