Copyright 2012 Rockwell Automation, Inc. All rights
reserved.Rev 5058-CO900B Soft Starter Technology Applying SMCs to
maximize investments and energy efficiency
Slide 2
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Title: Practical applications of Soft Starter technology for
improved performance and energy management Description: Increase
your technical competency and understanding of the latest Soft
Starter technology, and find out how SMC's can be applied to
maximize your investment and energy efficiency. This session will
include a brief overview on technology, recent advancements,
application examples and considerations, use of the SMC Application
Wizards, and an overview of the Allen Bradley SMC portfolio. RAOTM
- Topic
Slide 3
Copyright 2012 Rockwell Automation, Inc. All rights reserved.3
Agenda Allen Bradley SMC Portfolio Application Wizards Application
Examples and Considerations Recent Advancements Understand Soft
Starter Technology
Slide 4
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
AC Motor Control Basics 4 Basic Advanced
Slide 5
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Reduced Voltage Starter Background Pre 1980s RVS Types Auto
Transformer Part Winding Wye-Delta (Star-Delta) Primary Resistance
Primary Inductance Wound Rotor 5 Electromechanical Solid State
Todays RVS Solid State RVS Voltage controlled through use of SCRs
(Silicon Controlled Rectifiers) 6 Back to Back SCRs SCR triggered
ON by energizing the Gate Microprocessor monitors and controls when
SCRs fire SCR Gate
Slide 6
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Solid State Starting Basics 6 A. Using SCRs in an opposed (back to
back) configuration, the full sine wave of the AC power can be
controlled. B.By controlling when an SCR is fired in the cycle, the
output voltage can be controlled. The result is sometimes called a
Notch. SCR Control V IN SCR Gate V OUT Gate Signal AB
Slide 7
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Soft Motor Starting Basics 7 Typical Motor Starting Curve 100% 0
Speed -%RPM Starting Torque (Lock rotor torque) Pull-up torque
Break-down torque Full load torque Full Voltage Starting
Characteristics Starting Current ~6xFLA High starting torque can
cause damage to the mechanical system. High current can cause
problems in the electrical system 180% 100%
Slide 8
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Soft Motor Starting Basics If you reduce voltage by 50%, the result
is a 75% reduction in motor torque. (.5) 2 =.25 or 25% of Locked
Rotor Torque 180% 100% 100%0 Percentage of Full Speed Full Voltage
Torque Physics of Reduced Voltage and Motor Torque Reduced Voltage
Torque Percentage of Full Rated Torque
Slide 9
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Soft Motor Starting Basics 9 Example 100% 0 Speed -RPM Torque
(ftlb) 100% 72% 25% 600% 510% 300% 100% Voltage 85% Voltage 50%
Voltage Full Load Torque required by the load %FLA (amps) Current
Torque
Slide 10
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Reasons for Soft Motor Starting 10 Minimize mechanical damage of
system components and product Belts, Gears, Drive Shafts and
Keyways Reduced Product Spillage Water Hammer and Mechanical
Vibration Better Energy Management Limit in-rush current Optimize
the size of transformers/generators/switch gear Meet Power Company
Requirements / Rebate programs Manage Control under Power
Distribution Limitations Energy Cost Reduction (Peak Demand
Charges)
Slide 11
Copyright 2012 Rockwell Automation, Inc. All rights reserved.11
Agenda Allen Bradley SMC Portfolio Application Wizards Application
Examples and Considerations Recent Advancements Understand Soft
Starter Technology
Slide 12
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Electromechanical vs. Solid State 12 Solid State delivers greater
flexibility Allow for the starting current/torque to be optimized
versus standard reduced voltage starter types Example Star-Delta
reduced voltage starter is fixed at 300% current/33% Torque Solid
State insures minimal amount of energy to accelerate motor even if
the load only requires 25% torque. SS eliminates transitions due to
electromechanical limitations Open or Closed transitions Open
disconnects motor from line voltage, Closed maintains connection to
line Both cause current surges during start
Slide 13
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Advantages of Solid State Control Enhanced Control Options Advanced
Start/Stop control User Programmability and settings Scalable
setting for the critical nature of application Local, Manual,
Automatic Modes Inherent Diagnostics Current, Voltage, Power and
Energy Monitoring/protection Faults and Alarms (some based on real
time clock) Controller Event logs and Snapshot (what happened right
before a fault) Lowest Installed Cost with Network Integration Ease
of Communication Linkage (i.e. multi protocol, AOPs) Localized I/O
and Control Wire Reductions 13
Slide 14
Copyright 2012 Rockwell Automation, Inc. All rights reserved. 2
Phase Vs. 3 Phase Control Comparison 2 Phase Control Advantages
Lower initial cost Smaller overall total size 2 Phase Control
Disadvantages Higher Peak Currents/Imbalance Regardless of control
methodology Increased Heating Increased Vibration during Starting 3
Phase control provides superior performance on every start! 2 Phase
3 Phase
Slide 15
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Advances in Starting/Stopping Modes SMC-50 Patented Linear
Acceleration Starting Mode Simplest Starting Mode Lowest starting
current profile per start Regardless of loading condition Ideal for
any application Provides control over both torque and speed
Unmatched motor starting performance Selected start time closer to
actual than any other stating method* 15
Slide 16
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Starting Performance Comparison 16 Linear Accel vs. Traditional
Soft Start: Centrifugal Pump Load Parameter Settings: = Start Time:
10 second Time 2 Sec/Div = 3 Sec total Higher Peak Current High
Torque Pulse/Surge and water hammer 2 Sec/Div = ~10 Sec Current
more stable and less disruptive to power system
Slide 17
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Starting Performance Comparison 17 Linear Accel vs. Traditional
Soft Start: High Inertia Load Parameter Settings: =Start Time: 10
second Torque Pulse/Mechanical Wear and Tear Higher Peak Current
Time 2 Sec/Div = ~10 Sec 2 Sec/Div = ~6 Sec Current more stable and
less disruptive to power system
Slide 18
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Soft Starters Power and Energy Management Green Initiatives
Allow users to qualify for Energy focused based rebates and
discount programs Help reduce energy consumption and waste Facility
wide information enablement via Intelligent Motor Control
Sustainability and Sustainable Production Deliver a return on
investment with scalable products Reduced downtime and maintenance
costs Energy Savings Reduce the total amount of energy consumed
(Energy Saver in SMC-50) Reduce the total cost of energy
Slide 19
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Soft Starters and Energy Management Reduction of the peak inrush of
a motor (i.e. peak current) Reduces the peak demand charges Charges
are determined by utility based on the peak energy usage Advantages
of Controlled Demand Allows for the facility to optimize/maximize
distribution Smaller gensets or transformers (incl. feeders wires
etc.) Allows the power company optimize/maximize distribution
Possible reduced installation cost based on system demands Scalable
Performance SMC Flex and SMC-50 Provide advanced Power and Energy
Monitoring Measurement it = manage it Visibility = helps provide
business case support for future process and product
improvements
Slide 20
Copyright 2012 Rockwell Automation, Inc. All rights reserved.20
Agenda Allen Bradley SMC Portfolio Application Wizards Application
Examples and Considerations Recent Advancements Understand Soft
Starter Technology
Slide 21
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Motor Starting Comparison Full Voltage (DOL) Simplest Starting
Solution Full torque applied to motor Mechanical wear ~6x inrush
current Peak demand charges Limited Functionality Unless used with
advanced Overload Finite Mechanical Life Contacts will wear out No
Starting Choices SMC Soft Start Simple Starting and Stopping
Limited Control at various speeds Reduced torque and current during
starting Simple to adjust and setup Reduced installation costs
Smaller footprint No need for harmonic/EMC mitigation Highly
efficient when running at full speed Energy Saver Performance for
light loads Up to 15 different starting modes VFD/Drive Complete
Continuous Control at any Speed Full torque at any speed without
sacrificing current Highly efficient motor and application
performance More complex setup and install Larger footprint Impact
on Power Quality Application Considerations Motors types Lead
Lengths Wire Type Ambient Conditions Unlimited Starting
possibilities when sized properly
Slide 22
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Selecting a Starting Method Speed Control is required Consistent
Acceleration and Deceleration (New SMC-50 exception) High starting
torque required Continuous Feedback (critical position control)
Custom starting and stopping maneuvers Faster stopping with Dynamic
braking options Drive can hold rotor at zero speed Undersized or
closely matched motor or power source 22 When do I specify a drive
versus a soft starter?
Slide 23
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Why Use SMC Controllers? Minimize Operating Costs, Reduce Down time
Problem: Problem: Belts, gears and machinery can be damaged by
across-the-line starting SMC: SMC: Lengthens system life by
reducing mechanical stress during starting Reduces DOWN Time Helps
reduce/eliminate PMO on equipment No need to replace damaged parts
Minimal production loss 23 Breakdown Torque 180% 100% 0 Percentage
of Full Load Torque Percentage of Full Speed High torque can cause
physical damage to the mechanical system.
Slide 24
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Why Use SMC Controllers? Minimize Operating Costs, Reduce Down time
Problem: Problem: Power company restrictions on incoming line
current, or you pay the penalty Weak power lines cannot handle high
inrush currents, causing brown outs or excessive line disturbances,
which in turn cause other processes to shut down SMC Solution: SMC
Solution: Current Limit starting minimizes the amount of inrush
current, meeting power company restrictions and lowering peak
demand charges Process shut down and brown outs are minimized by
reducing the amount of current drawn during starting 24 600% 100% 0
Percentage of Full Load Current Percentage of Full Speed
Slide 25
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
How to apply SMC Controllers Determine the main reason for using
reduced voltage? Mechanical? Power Limitations? Simplicity? Select
the best solid state control mode 25 Soft Start Soft Stop Current
Limit Soft Start/CL with Kick Start Pump Control Torque Control
Linear Acceleration/Deceleration Special Modes Dual Ramp Full
Voltage Slow Speed Custom Starting Profiles Smart Motor Braking
Combination of profiles
Slide 26
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Standard Starting Methods Current Limit Primarily used to limit
line disturbances Constant or very lightly loaded motor Good on
high inertia applications Bandmills, Fans, Centrifuge, Ball Mill,
Washers Soft Start Primarily used to limit mechanical stress
Constant or exponentially increasing loads Compressors, Pumps,
Conveyors Soft Start/Current Limit with Kick Start Kick Start is
needed to overcome static condition Example: Cold system
components, loaded conveyor Full Voltage Not a common Starting
mode. NOTE: Full voltage required to accelerate the motor may be a
sign of other problems (i.e. Initial Torque of > 90%) Used as a
Solid State Contactor for High cycle rates 26
Slide 27
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Standard Starting Methods Pump Control Legacy version of torque
control optimized for centrifugal loads Simple to apply but some
considerations Exponentially increasing load such as Compressors,
Pumps, Conveyors Torque Control Similar to Pump Control performance
but applicable for all load types More difficult to apply but
yields higher level of performance Linear Acceleration/Deceleration
Simplest starting, lowest current, most consistent starting time
per start regardless of load 27
Slide 28
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Pump Control in SMC-Flex & SMC-50 Designed for Centrifugal
Pumps Applications lightly loaded at zero speed Reduces surges
(water hammer) caused by uncontrolled acceleration and deceleration
Can eliminate the need for specialized flow control valves Ease of
pump configuration Provides control without the use of sensors or
feedback devices Pump Control Compared to Linear Acceleration No
advantage, other than legacy migration Pump Control Compared to
Torque Control Easier to set up and optimized for centrifugal pumps
Not intended for Positive Displacement Pumps Full Load required at
zero speed Variable Speed typically required to control flow
28
Slide 29
Copyright 2012 Rockwell Automation, Inc. All rights reserved.29
Torque Speed Pump System Full Speed DOL Start Full Load SMC-Flex
& 50 Pump Control Soft Start Pump Start Excess
energy/power
Slide 30
Copyright 2012 Rockwell Automation, Inc. All rights reserved.30
SMB Smart Motor Braking SMC Flex and SMC-50 The SMB Smart Motor
Braking is designed to stop a motor quickly No additional hardware
or feedback devices are required Automatic zero speed shut off is
integrated into the controller
Slide 31
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMB Smart Motor Braking SMC Flex and SMC-50 Considerations How fast
do you want to brake? Rule of thumb Rule of thumb : It will take
you at least 1.5 times as long to brake a motor as it will to start
(3 to 4 times is more typical) How much power can you use for
braking? Rule of thumb Rule of thumb : Anything more than about
300% can play havoc with power systems and cause nuisance tripping
or worse. Can the power system handle the demands of braking
current for the entire duration of the stop? How consistent does
the brake time need to be? A good power supply is critical to
consistent braking 31 Good line Voltage regulation is the key to
successful braking!
Slide 32
Copyright 2012 Rockwell Automation, Inc. All rights reserved.32
SMB Common Concerns/Questions Braking is hard on the motor? True,
Braking regardless of the method, is hard on the motor windings
Noise is common during braking? True, moans and groans of all kinds
can be heard in a motor during braking Braking produces increased
Harmonic distortion? True, the SMC produces some harmonic
distortion during starting and stopping, however the levels are
insignificant (typically < 10% of the fundamental) SMB is a good
alternative for Critical braking? False, SMB is not intended to be
used for E-Stop scenarios. To many variables are involved which can
alter the performance of this feature The SMB option damages
motors? False, Braking is hard, but we can not create more energy
then what the motor demands. Motor damage is typically caused by
incorrect settings or normal wear and tear Smart Motor Braking is
an exact science? False, Most applications are dialed in via trial
and error
Slide 33
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Special Application Considerations Multi-Motor Applications
Mechanically Coupled (Transmission, direct gear drive, Conveyors)
Single SMC for multiple motors Separate Overload protection
required Not Mechanically Coupled (No physical connection) Separate
SMCs per motor One SMC Not Recommended Reduced Performance and
adjustability Too much variability in motor characteristics Cost
advantage with Adj.Freq. Drive, but less with SMC 33
Slide 34
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Special Application Considerations Power Source Sizing
Guidelines Ideally, the source would be sized for a full voltage
start. (Somewhat impractical today) When sizing for use with a
generator it is critical that the generator is able to stay in
proper regulation under starting or braking loads. Rule of thumb
Rule of thumb : Avoid sizing the supply for anything less the 300%
of the motors FLA. SCR Fusing for SCR Protection (Very Fast Acting
Semiconductor type fuse) Limited usefulness with SMC-Flex and
SMC-3, due to bypass operation Use is not suggested in High
Inertia, Braking, or Pump stop applications (Applications with
Start times > 30 seconds) due to potential for nuisance tripping
Can be used to achieve Type 2 Coordination in some cases See SMC
Wizard Short Circuit Protection (SCPD) Wizard for further guidance
34
Slide 35
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Special Application Considerations Power Factor Correction
Capacitors Line side only - locating load side can damage the SCR
Ideally PFCC are brought in with up-to-speed contact Dynamic
Correction can be responsible for nuisance line faults
Transient/Cyclic Spikes of Current Due to Load Variation Examples:
Rock Crushers, Wood Chippers, Band Saws, etc. With the SMC-Flex
& SMC-3, Spikes 120% of controller max frame rating causes the
bypass to drop in and outNOTE: If this is happening a lot, the SMC
is likely under sized for the application Insure the FLA
adjustment/programming is correct for the motor operation SMC-3 and
Soft Stop For best operation try to size SMC-3 mid range per
Selection Guide/Catalog 35
Slide 36
Copyright 2012 Rockwell Automation, Inc. All rights reserved.36
Sizing the starter for the application Selection guides are correct
for 90% of applications (Pumps, Fans, Compressors) Simply choose
based on voltage, horsepower, current and insure that the motor FLA
fits the SMCs operating range 10% of applications may require a
closer look Application Analysis: Load with potential high starting
inertia or minimal load Flywheel, chippers, grinders, braking,
retrofits, running vs. starting req. etc. Thermal Analysis may be
required to determine proper size for the following: Extended
starting or stopping times (>30 sec) Aggressive Duty Cycle (>
10 times/hr) Operation in elevated (above 50C) ambient temperatures
LRA > 600% (i.e. High efficiency motors, NEMA Design A) Solution
to Assist: SMC Estimation Wizard
Slide 37
Copyright 2012 Rockwell Automation, Inc. All rights reserved.37
Agenda Allen Bradley SMC Portfolio Application Wizards Application
Examples and Considerations Recent Advancements Understand Soft
Starter Technology
Slide 38
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Application Wizards To provide a better Estimation to the
applicability of a SMC-3, SMC Flex and SMC- 50 product to a given
set of motor & load operating requirements. Why use the Wizards
(eTools)?
Slide 39
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Application eTools Thermal Wizard Used for simple/quick
analysis of SMC capabilities from a thermal perspective Short
Circuit Protection Device Used to guide selection of branch circuit
protection components i.e. fuse or circuit breaker size bypass and
isolation sizing Application Wizard Used for advanced modeling of
the complete system including SMC thermal capabilities and
motor/load starting characteristics Wizards Available from:
ProposalWorks Tools pull-down or from:
http://ab.rockwellautomation.com/Motor-Control/Soft-Starters/SMC-Flex#/tab6
Slide 40
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Application eTools SMC Applications built for mobile phones and
tablets Cross platform support with all major mobile operating
systems iOS, Blackberry, and Android HTML 5 based applications
Allows for ease of use and updating Can run like any standalone
mobile application Almost fully offline capable Do an App Search
for Rockwell Automation
Slide 41
Copyright 2012 Rockwell Automation, Inc. All rights reserved.41
Agenda Allen Bradley SMC Portfolio Application Wizards Application
Examples and Considerations Recent Advancements Understand Soft
Starter Technology
Slide 42
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Solid State Power Control Portfolio SMC - 50 Performance /
Functionality Ampere Rating (Line and Delta)
25100200500160058001000 SMC Dialog SMC -3 *Dialog supports line
configuration only SSC
Slide 43
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
Allen-Bradley SMC Contemporary Offering 43 SMC-3SMC Flex SMC-50
Hybrid Power Structure Solid State Power Structure
Slide 44
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Family Choosing a Power Platform Hybrid Solid State (Integral
Bypass) 2 Thyristors per phase (6 total) Thermal Mass Small
Stirring Fans Integral Shorting or Bypass Contactor True Solid
State 2 Thyristors per phase (6 total) Larger finned heat sinks
& fans Optional external bypass contactors Ability to replace
contactor Ability to size contactor AC1 or AC3 Hybrid Solid State
AC53-B Smaller Total Footprint Less External Wiring Optimized
Thermal Management Easy Product Selection Lower Total Installed
Cost True Solid State AC53-A Ideal for Harsh Environmental
Conditions Higher SCCR ratings Phase Rebalance/Energy Saver
Capability Higher operations/hour Scalable Thermal Ratings
Slide 45
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Family Choosing a Power Platform Internal Bypass (SMC-3, SMC
Flex) Ideal for small spaces Smallest total footprint Easy
selection and application Lowest total installed cost Solid State
(SMC-50, SMC Dialog, SMC Plus) Ideal for critical performance in
tough environmental conditions Allows for Specialized Control
External Bypass offers operational flexibility and redundancy 45
Hybrid Power Structure Solid State Power Structure
Slide 46
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50, SMC-Flex Pump Control Slow Speed Dual Ramp Full Voltage
Starting Smart Motor Braking Linear Accel/Decel ( SMC-50 Only )
Torque Control ( SMC-50 Only ) SMC Family Choosing the control for
your application SMC-50, Flex & SMC-3 Soft Start Soft Stop
Current Limit Soft with Kick Start 46 Which control modes are
required? The SMC Flex / 50 also offer power metering features as
well as communication options enhancing configuration, control and
data collection capabilities!
Slide 47
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-3 Overview Compact Series Hybrid design (internal bypass
contacts) Simplified DIP and Rotary Set-up Din Rail Mountable
through 85 amps 4 Starting/Stopping Modes Soft-start, Soft-stop,
Current Limit, Kick Start Basic Diagnostics Compact design provides
3 phase control, increased intelligence, and unmatched performance.
Motor and system diagnostics and an electronics overload with
adjustable trip class help reduce downtime and protect assets.
Hybrid Power Structure
Slide 48
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-3 Overview Line Ratings Frame 1 (3 A, 9 A,16 A, 19 A, 25 A, 30
A, 37 A) Frame 2 (43 A, 60 A, 85 A) Frame 3 (108 A, 135 A) Frame 4
(201 A, 251 A) Frame 5 (317 A, 361 A, 480 A) Delta Ratings 3 831
amps Two line voltage ratings 200480V or 200600V @ 50/60 Hertz Two
control voltage 24V AC/DC or 100240V AC 050C Operating temperature
SMC-3 can be applied to both line and delta connected
applications!
Slide 49
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Flex - Overview Modular Class Hybrid design (internal bypass
contacts) Built-In LCD and Keypad 9 Start/Stopping Modes 3
slow-speed modes Smart Motor Braking Enhanced Diagnostics and
Protection functions Hybrid Power Structure Modular design features
3 phase control, advanced intelligence, performance and
diagnostics, communications flexibility, modular control
module/power modules/fan assembly for a cost effective
package.
Slide 50
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC Flex - Overview Line Ratings 5.1250 Amps Delta Ratings 81600
Amps Three Voltage Ratings 200 - 480V @ 50/60 Hz 200 - 600V @ 50/60
Hz 230 690V @ 50/60 Hz Control Voltage Ratings 100-240 VAC or 24V
AC/DC 0 - 50 C Operating Temperature Soft-Start With selectable
Kick Start Soft-Stop Current Limit Start With selectable Kick Start
Full Voltage Preset Slow Speed Linear Speed Acceleration Feedback
Device Required Dual Ramp Pump Control (optional)
SpecificationsStarting Modes
Slide 51
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50 Product Overview Scalable Series Solid State Power Structure
NO Integral bypass like SMC-3 or SMC-Flex Built-In HIM Cradle and
PC port 15 Start/Stopping Modes 3 slow-speed modes Smart Motor
Braking Advanced Diagnostics and Protection functions Full power
and energy management, Real Time Clock, Event Log 51 Solid State
Power Structure Designed for customer flexibility 3 phase control
and scalable options help maximize the total motor control
investment. Advanced monitoring and protection, superior
communication capabilities and energy saver modes help increase
operating efficiencies and reduce downtime.
Slide 52
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50 Product Overview Benefits of a Fully Solid State Power
Structure (no integral bypass) Improved performance in high
vibration applications Performance not impacted by environmental
debris Longer life (no mechanical life limits) Scalable thermal
ratings Higher SCCR ratings 100 Ka Fuses 65 Ka Breaker 52
Slide 53
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
www.rockwellautomation.com Follow ROKAutomation on Facebook &
Twitter. Connect with us on LinkedIn. Rev 5058-CO900B Thank You!
Find More Information on SMC Products Visit us @ WWW.AB.com
Slide 54
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
www.rockwellautomation.com Follow ROKAutomation on Facebook &
Twitter. Connect with us on LinkedIn. Rev 5058-CO900B Back-Up
Slides
Slide 55
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50 Modes of Operation Soft Start Current Limit w/ Kick Start
Pump Control Enhanced Slow Speed: 1% to 15% Patented Sensor-less
Linear Acceleration* Consistent ramp up time (no tachometer
required) Optimizes energy consumption Torque Control Full Voltage
Dual Ramp w/ Kick Start 55 *SMC Flex provides Linear Acceleration
Start, however it requires a tachometer for speed feedback Starting
Modes Stopping / Specialty Modes Coast Soft Stop Smart Motor
Braking (SMB) Linear Deceleration External Braking Control Pump
Control Motor Winding Heater Energy Saver Phases back voltage
sensing lighter loads Emergency Run NEW!
Slide 56
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50 Modes of Operation Linear Speed Patented Sensor-less Linear
Acceleration Starting Mode Accomplished via Advanced Motor Speed
Estimation Algorithm No external feedback required - reduces cost
and potential for failure Provides exacting motor acceleration
control under varying load conditions Simplest to Setup 2
Parameters Required to configure: Ramp Time and Initial Torque
(used as reference) Reduces/eliminates the need for the Dual Ramp
mode Always uses the minimum amount of energy needed to accelerate
the motor in the time requested (regardless of the loading
condition) 56
Slide 57
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50 Modes of Operation Torque Control Torque Control can be used
to control the maximum torque developed by the motor independent of
motor speed Provides a torque ramp from an initial starting torque
level to a maximum torque level Mode also provides simple starting
performance (Kick start available as an option) Controlling torque
does not allow control over speed of acceleration like Linear
Accel. Torque Control algorithms are useful for basic applications
(pumps, compressors) Basic Setup Parameters: Ramp Time, Starting
Torque, Max Torque(M), Rated Torque(M) and Rated Speed Settings(M)
57 (M) = motor rated value
Slide 58
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMC-50 Modes of Operation Comparison Example 58 Linear Accel vs.
Torque (Pump) Start: Pump Load Parameter Settings: =Start Time: 10
second Time 2 Sec/Div = 10 Sec total Motor load = approx 65% of FLA
2 Sec/Div = 5 Sec total Higher Peak Current NOTEs: - Actual Start
time difference of Linear versus torque mode - Smoother torque
curve for Linear versus torque mode - Lower peak current with
Linear Acceleration mode
Slide 59
Copyright 2012 Rockwell Automation, Inc. All rights reserved.
SMCs Differentiated by Innovation Broadest offering of
Features/Performance/Functionality in a Soft Start Advanced
Starting/Stopping Performance (Linear Mode) True 3 Phase Control
Solid State or Hybrid Performance and Reliability Simple to
Advanced Fault, Power, and Energy Monitoring Improved
Troubleshooting, Diagnostics Accuracy and time stamping High Fault
SCCR ratings with Fuses and Standard Breakers Special Modes Slow
Speed, Motor Winding Heater, Energy Saver, Phase Rebalance,
DeviceLogix Standard features cover multiple dedicated devices
Power Monitors, Scopes, ETMs, Motor Winding Heaters, DC Brake etc.
Standard Open and Enclosed offerings