Presenter: Dal Y. Ohm, Ph.D, President, Drivetech, Inc.
When: February 7th; 8:00 a.m. to 12:00 p.m.
Registration: $295 before January 5th, $395 after January 5th. Attend both Drivetech workshops: $495 before January 5th, $650 after January 5th
This introductory course is to provide fundamental concepts of electric motors and motor control techniques along with introduction of new advanced† technologies. The objective of this course is for who want to learn fundamental principles and basic knowledge on electromagnetic torque production theory, construction and operation of DC, PM Brushless, Reluctance and Induction motors. This course also discusses control electronics hardware and control algorithms, feedback control and servo systems, PID regulators and their tuning procedure.
The course starts with the magnetic and mechanical structure of the various motor types (including DC, Brushless, induction and SR motors) to understand torque production mechanism and required commutation strategies. †Discussion is followed by control of power semiconductor switches, PWM techniques, motor drive topologies, drive hardware, control algorithms, and software implementation, as well as current and speed control.† †The content also explains pros and cons of drive technologies such as 6-step vs. sinusoidal, voltage drive vs. current drive, phase current regulator vs synchronous regulator, PID vs other controllers, sensored vs sensorless control, etc. †From the authorís long experience in research and development of many different types of drives, practical and useful procedures in selecting control method, rule-of-thumb design rules, control system structure and tuning, performance vs. cost tradeoff, etc will be discussed.† Course contents include
- Basics of DC and Brushless Motor Control
- Structure and Operation of DC† motors
- General Mechanism of Electromagnetic Torque Production
- Brushless PM †motors
- 6-Step Commutation and Switching Schemes
- Power Electronics and Drive Hardware
- Comparison between Trapezoidal and Sinusoidal control
- Control of Induction Motors
2.† Servo System Analysis and Control Structure
- Motor Model and Control Structure
- PI(D) controller and Gains
- Nested Loop – Velocity and Position Control
- Various Current Control Methods
- Various Feedback Devices and Sensorless Control Methods
Dr. Ohm is the president of Drivetech, Inc., a technical consulting firm specializing in motor control, drives and renewable energy converter systems.† He has more than 25 years of industrial and academic experience in research and product development in the fields of motor drives, servo systems, and power converters.† His major area of interest includes motion control, digital control and robotics, AC and DC motor drives (Senosred and Sensorless) and power electronics.† He has more than 50 published articles and conference presentations in the above area.† Prior to consulting, he was Technical Director at Kollmorgen Motion Technologies Group.† He was also with Baldor Electric Company and Electrocraft, Inc.† He taught engineering courses (Electric Machines, Robotics, Digital Control) at San Jose State University, NPU, and Cogswell Polytechnical College as Adjunct Professor for many years.† He received Ph.D. and M.S. degrees in Electrical Engineering from Texas A&M University.† He is a member of IEEE, SAE and MCMA.