Dynamics and Control of AC DrivesSee upcoming dates
Apply your fundamental knowledge of power conversion and AC machine theory to learn new skills that will make you more effective on the job.
This course will teach you:
- The principles of modern AC drives, including PM, induction PM, and reluctance machines
- The modes of interaction between ac motors and power conversion systems, including dynamic stability issues
- How to control ac machines, including the principles of field orientation and direct torque control
- How to model and simulate ac motor/drive systems
- How to use modern control theory to design controllers that minimize or eliminate dynamic interactions in drive systems
- The performance of sensorless control methods for ac drives
- The causes and mitigation of drive-induced machine bearing currents and insulation stress
- The operation and control of regenerative drives and converters
Who Should Attend?
Engineers involved in the design and development of AC drive systems or a design/development engineer incorporating AC motors and drives into other products and equipment.
Review of Basic Induction Motor Theory
- Equivalent circuit model
- Variable frequency operation
- Non-sinusoidal excitation
Review of Synchronous Machine Theory
- Physical structure and principle of operation
- Equivalent circuit model
- Torque angle and phasor diagram
- Influence of saliency
- Variable frequency operation
- Permanent magnet machines
Converters for AC Drives
- Functional requirements of converters
- Types of converters in use today
- Operating features
- Performance capabilities
Adjustable Speed Drive Types
- Power semiconductor types
- Power converter classifications
- Induction machine drive configurations—VSI, CSI, Static Scheribus
- Synchronous machine drive configurations—VSI, CSI, Current Regulating
Induction Motor Model
- Coupled circuit model of AC machines
- d-q reference frame representation
- Vector representation of machines
- Effects of saliency
Vector Analysis of Induction Machines
- Steady state equivalent circuits
- Electrical transients at constant speed
- Transient equivalent circuits
Current Regulation in Power Converters
- Proportional and “P-I” Control Basics
- Command Feedforward (CFF)
- Disturbance Input Decoupling (DID)
- Decoupling State Feedback (DSFbk)
- Extension to VSI and AC Motor Current Control
Simulation of AC Machines and Drives
- Flux linkage machine models
- Survey of simulation programs
- Simulation using MATLAB/SIMULINK
- Converter modeling
- Demonstration of converter-machine simulation
Complex Modeling for Control Design and Analysis
- Vector and scalar models of machines
- Synchronous vs. stationary frame vector models
- Asymmetric root locations and frequency response functions
- Controller design using vector models
Field Orientation (FO)–Induction Machines
- Steady state induction machine FO
- Dynamics of induction machine FO
- Indirect controllers for induction machine FO
- Direct controllers for induction machine FO
- Flux level selection
- Inverter imposed voltage and current limits
- Torque capability in field weakening
- Control system implementation
Flux Observers and Direct Field Orientation (DFO)
- Field orientation from a controls perspective
- Industry standard indirect Field Orientation
- Existing methods for DFO
- Observer-based flux estimation
- Observer-based DFO
Field Orientation Control of Synchronous Machines
- Requirements for high-performance torque control
- Self-synchronous control
- Maximum torque-per-amp operation
- Dynamic response characteristics
- “Brushless” DC machines
Permanent Magnet Synchronous Machine Drives
- Permanent magnet machine discussion
- Vector control of permanent magnet synchronous machines
- Flux weakening operation
Direct Torque Control
- Stator flux and electromagnetic torque control
- Implementation alternatives
- Exciting and tracking saliencies
- Observers and performance metrics
Simulation of Field-Oriented Drives
- Motor model
- PWM/inverter model
- Speed and current regulators
- Slip gain calculation
Practical Aspects of Drive Control
- Current feedback
- Speed feedback
Inverter Effects–Bearing Currents
- Short voltage rise times
- Voltage reflection
- Influence of motors and cables
Operation and Control of Regenerative Drives and Converters
- Motivation for regeneration
- Regenerative converters as front-ends of regenerative drives
- Principle of operation
- Phase-lock loop systems for synchronization with single and three-phase systems
- DC Bus voltage control
Parameter Estimation and Adaptation
- Basic estimation principles
- Formulation of accurate methodology
- Forming induction machine models
- Selecting excitation models
Fault Protection for AC Drives
- Asymmetrical systems
- Fault model development
- Fault signature identification
"Very thorough and complete coverage of the presented topics."
—Jason Johnson, Northrop-Grumman Shipbuilding, Newport News, Virginia
"AWESOME! Nice to get the latest info in a concise and well-explained format. Lots of good info."
—John Neely, Eaton Aerospace, Grand Rapids, Michigan
"Very good presentation; quite insightful."
—DeWayne Speer, Manager of Electrical Engineering, Helmerich & Payne IDC, Tulsa, Oklahoma
"Best course I've ever had over a nearly 30-year career. I wish I'd had these professors when I was in college. They are all exceptional."
—Allen Davidson, Sr. Project Engineer, Northrop-Grumman Shipbuilding, Newport News, Virginia
Vladimir Blasko works in the United Technologies Research Center directing the power electronics research unit. His primary areas of interest and expertise are AC drives, intelligent power management, power electronics, applied modern control theory, and technology and he has long industrial experience in research and development in power electronics and electrical drives. Vladimir previously worked at Otis Elevators and Rockwell Automation-Allen Bradley Company and holds a PhD in electrical engineering.
Thomas M. Jahns is a Professor with the Department of Electrical and Computer Engineering at the University of Wisconsin–Madison. Previously with GE Corporate R&D and Massachusetts Institute of Technology, Jahns has research interests in electric machines, drive system analysis and control, and power electronic modules.
Dr. Kerkman is a Distinguished Engineering Fellow with Rockwell Automation. His career spans 32 years in power electronics and adjustable speed drives and his current interests include adaptive control applied to field-oriented induction machines, design of AC motors for adjustable speed applications, and EMI from PWM inverters. Dr. Kerkman received his BSEE, MSEE, and PhD degrees in electrical engineering from Purdue University.
Bulent Sarlioglu is an associate professor at the University of Wisconsin–Madison and the associate director of the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC). He previously worked at Honeywell International Inc.'s aerospace division for 11 years, most recently as a staff systems engineer, earning Honeywell's technical achievement award in 2003 and an outstanding engineer award in 2011. Bulent’s expertise includes electrical machines, drives, and power electronics and he is the inventor or co-inventor of 15 US patents as well as many international patents. He received his PhD from University of Wisconsin–Madison, MS from University of Missouri–Columbia, and BS from Istanbul Technical University, all in electrical engineering.
Michael received his BS, MS and Ph.D. in Mechanical Engineering from the University of Wisconsin – Madison in 1997, 1999 and 2006, respectively. His research focused on control theory, electric machines and power electronics. During his studies, he worked with numerous companies including Whirlpool, Ford Motor Company, Schneider Electric, International Rectifier and Hamilton Sundstrand.
In 2006, Michael joined Hamilton Sundstrand in the Applied Research Department where he worked on motor control and power electronics for aerospace applications including motor drives and actuators. Between 2010 and 2013 he was with Danfoss Power Electronics where he focused on industrial motor control. He has since returned to Hamilton Sundstrand, now known as UTC Aerospace Systems. He is also an Adjunct Professor at the University of Rome La Sapienza, teaching coursework on dynamic analysis and control of ac machines.
Michael is a member of the Institute of Electrical and Electronic Engineers where he serves as the Past Chair of the Industrial Drives Committee and society representative to the Sensors Council AdCom for the Industry Applications Society. He was the Technical Program co-Chair for the IEEE Energy Conversion Congress and Exposition 2013. He has published 25 papers in conferences and journals and has 8 patents.
Upcoming dates (1)
Aug. 10-14, 2020
Dynamics and Control of AC Drives
Course #: RA00031-U221
- $1895: Fee covers course materials and instruction.
- CEU: 2.6
- PDH: 26
Class begins: 8:00 AM Class ends: 12:30 PM on each day
Instructor(s)Vladimir Blasko, Michael Harke, Thomas Jahns, Russel Kerkman, Bulent Sarlioglu
WEMPEC Member Fee: $1695.
WEMPEC Discount: $200 for WEMPEC membership.
LocationThis is an online course.
If you cannot attend, please notify us no later than one week before your course begins, and we will refund your fee. Cancellations received after this date and no-shows are subject to a $150 administrative fee. You may enroll a substitute at any time before the course starts.
Dynamics and Control of AC DrivesCourse #: RA00031
Dynamics and Control of AC DrivesDate: Mon. July 30, 2018 – Thu. August 02, 2018
- Fee covers morning and afternoon breaks, scheduled lunches and course materials
- CEU: 2.6
- PDH: 26