Electric Motor Power Measurement & Analysis
Presented by: Bill Gatheridge, Product Manager • Yokogawa Corporation of America, Ian Walker, Vice President of Sales • GMW Associates
When: January 27th, 8:00am to 12:00pm
Registration: Before 12/27: $195, After 12/27: $295
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This four hour seminar will provide the attendees with a three step process for making precision electrical and mechanical power measurements on AC motors and variable speed drive systems in order to measure and calculate the system power efficiency. Topics will include a review of basic electrical and mechanical Power measurements, three-phase AC motor power measurements and PWM motor drive power measurements. We will show how to make measurements and calculate the drive power loss, drive efficiency, volts/Hz along with some helpful tips and trick for other drive measurements. Next we will cover the mechanical power measurements from the electric motor, methods and equipment for rotating speed and torque measurements. Finally we look at the complete motor system and how to make the efficiency measurements on each of the components as well as the complete motor and variable frequency drive system, and other testing techniques outlined in IEEE Standard 112B, test procedure for polyphase induction motors.
A related topic will cover the instrument considerations and selection for various motor testing applications. We will review various instruments for the electrical measurements, accessory items such as Current and Potential Transformers and provide information on the instruments for speed and torque measurements.
A special section will be devoted to the current sensors required for use on Variable Frequency Drives. This topic will be led by Ian Walker of GMW Associates. He will discuss the need for wide bandwidth, DC/AC precision current transformer, current sensor considerations and selection, and the associated technology, measurement accuracy and performance of the zero flux type current sensors. A comparison between various current sensor technologies will be discussed and demonstrated.
Special emphasis will be given to instrument measurement accuracy and uncertainty calculations and their relation to the Power Efficiency measurement and calculation. Sample motor, drive and system efficiency calculations will be made based on various instrument selections. Examples of actual electrical and mechanical power measurements will be presented using a precision power analyzer and a motor dynamometer and brake system.
This seminar is designed for top executives and technical professionals, design engineers and managers, test engineers and technicians involved with power measurements, performance testing and efficiency measurements and calculations of electric motors and variable speed drive systems. Each attendee will receive a workshop workbook and a CD with the workshop presentation and other valuable reference and application information.
 Bill Gatheridge is the Product Manager at Yokogawa, and is responsible for the Power Analyzer product line as well as other measuring instruments. He has more than 20 years experience with Yokogawa in the area of precision electrical power measurements. He a member and Vice Chairman of the ASME PTC19.6 committee on Electrical Power Measurements for Utility Power Plant Performance Testing.
 Ian Walker is the vice president of Sales for GMW Associates. Ian has an MSc Degree in Nuclear Physics from the University of Auckland, New Zealand. He is the co-founder of GMW Associates in California and has been managing the development of very high precision magnetic field and current measurement and control instrumentation for electromagnets used in particle accelerators, magnetic resonance imaging (MRI) and magnetic storage test systems.
Motor Control, AC Drives and Servo Systems
Presented by: Dr. Dal Ohm, President, Drivetech, Inc.
When: January 27, 1:00 pm to 5:00 pm
Registration: Before 12/27: $295, After 12/27: $495
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The purpose of this workshop is to provide fundamental concepts on motor control theory and in-depth knowledge and skills in designing high performance motor drives. The workshop starts with the magnetic and mechanical structure of the various motor types to understand torque production mechanism and to derive a machine model for various control techniques. Discussion is followed by various implementation tools such as power electronics switches, motor drive topologies, drive hardware, commutation algorithm and software as well as servo systems.. The content will cover most of the basic skills in designing brushless, reluctance and induction motor drives with a variety of feedback sensors. From the author’s long experience in research and development of many different types of drives, practical and useful procedures in selecting components and methods, rule-of-thumb design rules, performance vs cost tradeoff, etc will be discussed. Workshop contents include:
1. Power Electronics for Motor Drives, Power Electronics Devices, Rectifiers and DC Motor Control, Brushless Motors and Electronic Commutation, Drive Configuration and PWM, Gate Drive Design
2. DC Motors and Servo Systems, Torque Production in DC Motors, Servo System Fundamentals, Current Control of DC Drives, PID and other Velocity and Position Control Algorithms, Mechanical Resonance Modeling and Digital Filtering Technique
3. Control of Brushless and Induction Motors, Basic Principles of Torque production in DC and AC Electric Motors, Dynamic Model of Brushless Motors, Frame Transformation and Synchronous d-q frame Model of Motors, Angle Advance Control of Brushless Motors, Control of Induction Motors and Field-Weakening Operation
4. New Technologies in AC Motor Control, Space Vector Modulation, Advanced Digital Current Control, Modeling and Simulation
 Dr. Ohm is the president of Drivetech, Inc., a technical consulting firm specializing in motor control, drives and servo systems. He has more than 20 years of industrial and academic experience in research and product development in the fields of motor drives and servo systems. His major area of interest includes motion control, digital control and robotics, vector control, AC and DC motor drives and power electronics.
Design and Optimization of BLDC and Induction Motors
Presented by: Jim Hendershot, Tanvir Rahman • Infolytica
When: 8:00 am to 12:00 pm; 1:00 pm to 5:00 pm
Registration for Morning Session on BLDC: Before 12/27: $295, After 12/27: $395
Registration for Afternoon Session on Induction: Before 12/27: $295, After 12/27: $395
Registration for Both Sessions: Before 12/27: $495, After 12/27: $595
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This workshop will focus on the design, analysis and optimization of BLDC and induction motors. The workshop, divided into two sessions, will cover permanent magnet BLDC motors in the morning and induction motors in the afternoon. Topic covered will include the following; output based sizing of motors, discussions of motor template and geometry selections, motor dimensioning, winding design and motor analysis methods. The attendees will learn to select motor types base on performance requirements as well as engineering and financial constraints. Selection of lamination and permanent magnet materials will also be discussed. Typical winding configurations, their characteristics, layout methods will be covered as well. The optimal approach to designing an electric machine based on such criterion will be discussed and demonstrated. The attendee will learn these and many other aspects of motor design by solving and applying practical design problems in the classroom.
This course is intended for beginners and experienced motor designers alike.
Jim Hendershot has 40 years experience in practical hands-on PM & SR brushless motor design, manufacturing and development. With past key employments at United Technologies, General Motors, Clifton Precision, Berger Lahr & Pacific Scientific, he has designed hundreds of brushless motors for computer disc drives, servo systems, high speed machine tool spindles, traction drives, hybrid vehicles, micro-turbine and diesel generators.
Dr. Tanvir Rahman is an Application Engineer at Infolytica Corporation where his primary responsibility is the CAD and applications of electromagnetic solvers to electric machines. Most recently he has been involved with applying some of the latest CAD tools for power electronics and control system designs for Brushless DC and induction motors for HEVs.
Emerging Motor Technologies
Presented by: George Holling, AiME
When: 1:00 pm to 5:00 pm
Registration: Before 12/27: $195, After 12/27: $295
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In recent years several new motor technologies have emerged that can have significant performance advantages in specific applications, such as Internal Permanent Magnet (IPM), Transverse Flux (TFM), Integral Harmonic Gear IHG), Hybrid - combines or more magnetic effects. The course is intended as an overview over these different technologies and their main performance characteristics.
The course is intended for development engineers who are trying to find the 'best' technology for a new product concept and motion (motor) professionals who want to keep up with these emerging trends. The attendees will be introduced to several of these motor technologies and their respective operating characteristics, potential applications and their respective drawbacks. This will enable the attendee to make a selection from these technologies for further, detailed study and analysis for a specific application.
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