A unique opportunity for an extraordinary level of learning.
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Workshop: Schedule: Dec 08, 2011
Strategic Technology Group LLC
Design, Development and Manufacturing of Brushless
Permanent Magnet Motors, Motor Control & Motor Drives
Workshop Overview:
Does it do any good to have a well optimized motor alone? Unless a brushless PM system is well optimized, it is of no use. A well
designed and integrated system often results in lowest cost and best performance.
STG (Strategic Technology Group LLC) based in the metro Washington DC area has organized a workshop to address three
important elements of a brushless PM motor system – Brushless PM motor design, Simulation, algorithm & software development,
and power stage design. The goal of the workshop is to address all these topics from a systems’ perspective and not in isolation.
STG and its staff have had a proven record of developing and commercializing a number of 3-, 5- and 7-phase brushless motor
systems for various industrial, medical and consumer applications.
The design process of a brushless PM motor system is inherently iterative. A tug of war erupts among motor, power electronics,
software, mechanical and manufacturing engineers. It is important to understand the iterations and optimizations involved in the
process while birthing a brushless PM motor system. Every aspect of the system starting from motor performance to winding design
to final system integration to manufacturability and ultimate reliability and safety need to be well understood and appreciated.
Motor design section of the workshop will cover basic motor design considerations to waveform and performance evaluation,
speed/torque curve generation, EMF, phase currents, efficiency estimates, loss calculations, comparisons of various designs etc.
Under software development, we will cover the principles of FOC (field oriented control, or vector control), space vector modulation,
field weakening operation, control system analysis, compensation etc.
Under Power Stage Design, the workshop will focus achieving the desired performance from PM machines when integrated with an
Inverter. This section will cover selection of power devices, PCB layout, safety, EMI/EMC, thermal analysis etc.
The workshop will cover several example designs and simulations using MotorSolveTM, PSpiceTM, SimulinkTM and VISSIMTM.
Phone: Toll Free US (877) 592-4848 Fax: Toll Free (888) 453-0997 Copyright © 2009 - 2010 STG All rights reserved.
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“The presenter has a unique distinction of having conceived, designed, developed and manufactured 3-, 5- and 7-phase radial and axial flux brushless permanent magnet motor/BLDC systems. This workshop presents judicious approach and practical guide developed from substantial hands-on experience of the presenter. ”
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Figure 1: This Workshop will
cover three topics in detail –
Brushless PM motor design,
Simulation, algorithm &
software engineering and
power stage design
Figure 2: Examples will include
Surface magnet machines with
concentric windings. Such machines
offer exciting possibilities.
Figure 3: Finite Element Analysis will be covered in Section 1 of the Workshop
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1.0 Brushless PM/BLDC Motor Design
Brushless permanent magnet (PM) motors are preferable choice in many applications due to low weight and volume, high torque and
power density, excellent controllability and reliability, simplicity and ruggedness, high efficiency and low maintenance. They have
superior advantages in variable speed and load applications compared with induction, switched- and variable-reluctance motors. In
recent years, poly-phase PM motors of 3-, 4-, 5-, 6- and 7-phase configurations have been investigated. Some of these motor
configurations have shown promise to improve performance over three-phase configurations.
Research has also been carried out in radial, axial, transverse and Halbach array flux architectures. The radial flux motors (RFM)
has been widely used in the industry due to relative ease in manufacturing. Axial flux motors (AFM) have been difficult to
manufacture due to the high expense of fabricating lamination stacks. Axial flux motors have shown superior performance over radial
flux motors under a narrow set of circumstances and additionally where length of the motor is less than 30% of the diameter
(length/diameter<0.3). Transverse flux motors (TFM) are more difficult to design and manufacture. Halbach array motors have
shown promise for operations requiring significantly higher speed and are not considered suitable for low speed, high torque
operations.
Exciting innovations continue in this field. This workshop will focus on methods for designing brushless PM/BLDC machines. This
begins with a review of basic design considerations, with a description of motor, winding and magnetic architecture, analytical and
finite element methods, thermal analysis, simulations followed by mechanical and manufacturing design considerations.
Under this section we will also discuss design criteria based on power, efficiency, drive configurations, size and cooling constraints.
The workshop will also cover sizing of the motor using analytical and FEA methods, common rotor and stator configurations, air gap
shear stress based outer and inner diameters, magnet, back-iron and lamination material selection, loss and efficiency
considerations with resistive, hysteresis and eddy current effects. The section will compare various winding types and designs such
as lap, concentric, balanced windings along with a discussion on the winding factors.
Several control methods exist today for control of PM machines. Trapezoidal control injects trapezoidal current waveforms into the
motor windings. Sinusoidal control injects sinusoidal current. Field oriented control (FOC) converts poly-phase motor currents into a
Cartesian coordinate system which rotates with the motor’s synchronous speed. This results in direct control of air gap flux and
hence torque. FOC has been known to improve a motor’s dynamic performance substantially. Space vector control is known to
increase DC bus voltage utilization by as much as 15% by clever application of the available bus voltage.
Studies of 3-, 5- and 7-phase inverters for low voltage applications have been conducted. The study stated that the 5- and 7-phase
inverters resulted in lower current per phase and leg resulting in higher reliability, better DC bus voltage utilization resulting in more
output power, and better utilization of harmonics resulting in more torque. The study showed significant improvement in performance
of 5-phase inverters over 3-phase inverters. The performance of 7-phase inverters was marginal over the 5-phase inverters.
In this section we will cover simulation, algorithm and software development methodology and tools for brushless permanent magnet
motor systems. Under algorithm development, we will cover the principles of FOC (field oriented control, or vector control), followed
by various advanced implementation techniques for high performance and energy efficiency including predictive current control,
decoupling control, space vector modulation, field weakening operation, as well as modeling and simulation.
This section will also cover control system analysis and compensation – open loop transfer function, stability criteria, Type 1, 2 and 3
Amplifiers, and K factor technique for stability analysis if time permits.
In this section we would briefly discuss use of such tools as dSPACE™, VISSIM™ etc. This section will also provide Software
development examples based on Agile Software Development Model.

Figure 4: Agile Software Development
Model will be discussed in section 3 of
the workshop. This model can help
develop a well thought-out strategy for
Software Engineering.
3.0 Power Stage Design
Substantial innovations have taken place in the field of power electronics in the last decade. These innovations have continually
churned out better semiconductor devices, thermal management systems, and materials. These breakthroughs have allowed
smaller and more efficient inverters. Some tougher and space constrained applications have demanded a tight integration between
motors and inverters. We will briefly discuss such innovations and their applications.
This section will also focus on power stage design and achieving the desired performance from PM machines when integrated with
an Inverter. This section will cover selection of power devices, PCB layout, safety, EMI/EMC, environmental and reliability
considerations, thermal analysis, mechanical and manufacturing considerations.
- Designing Brushless Permanent Magnet Motors (5.0 Hours)
- Basic Design Considerations;
- Motor Architecture;
- Winding Architecture;
- Magnetic Architecture;
- Analytical Methods;
- Finite Element Methods (using Motor Solve™ );
- Thermal Analysis;
- Example Simulations (using PSpice™ and/or Simulink™);
- Mechanical Design Considerations;
- Manufacturing Design Considerations.
2. Simulation, Algorithm and Software Development (4.50 Hours)
- Basic BLDC Control Algorithm ;
- Basic Sinusoidal Control;
- Field Oriented Control;
- Space Vector Modulation;
- Simulation Examples (PSpice™ and/or Simulink™);
- System Stability Analysis and Compensation;
- Application of Agile Software Development Model.
3. Power Stage Design (1.50 Hours)
- Motor Drive Topologies;
- Selection of Power Devices;
- Layout Considerations;
- Safety, EMI/EMC, Environmental and Reliability Considerations;
- Example Simulations (using PSpice™ and/or Simulink™);
- Thermal Analysis;
- Mechanical Design Considerations;
- Manufacturing Design Considerations.
Focus: Simulation, Design and Analysis of Brushless Permanent Magnet Motor/BLDC Systems
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9:00AM – 9:30AM
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Registration and Check In
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9:30AM – 12:30PM
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Designing Brushless Permanent Magnet Motors
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Basic Design Considerations; Motor Architecture; Winding Architecture; Magnetic Architecture; Analytical Methods; Q&A (15 Minutes).
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12:30PM – 1:30PM
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Lunch & Networking Opportunity (30 minutes)
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1:30PM – 3:00PM
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Designing Brushless Permanent Magnet Motors
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Finite Element Methods (using Motor Solve™ ); Thermal Analysis; Example Simulations (using PSpice™ and/or Simulink™); Mechanical Design Considerations; Manufacturing Design Considerations; Q&A (15 Minutes).
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3:00PM – 5:30PM
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Simulation, Algorithm and Software Engineering
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Basic BLDC Control Algorithm ; Basic Sinusoidal Control; Field Oriented Control; Space Vector Modulation; Simulation Examples (PSpice™ and/or Simulink™); Agile Software Development Model; System Stability Analysis and Compensation; Q&A (15 Minutes)
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Focus: Simulation, Design and Analysis of Brushless Permanent Magnet Motor/BLDC Systems
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9:00AM – 11:00AM
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Simulation, Algorithm and Software Engineering
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Basic BLDC Control Algorithm ; Basic Sinusoidal Control; Field Oriented Control; Space Vector Modulation; Simulation Examples (PSpice™ and/or Simulink™); Agile Software Development Model; System Stability Analysis and Compensation.
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11:00AM – 12:30PM
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Power Stage Design
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Motor Drive Topologies; Selection of Power Devices; Layout Considerations;
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12:30PM – 1:30PM
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Lunch & Networking Opportunity (30 minutes)
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1:30PM – 5:30PM
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Safety, EMI/EMC, Environmental and Reliability Considerations; Example Simulations (using PSpice™ and/or Simulink™); Thermal Analysis; Mechanical Design Considerations; Manufacturing Design Considerations; Q&A (15 Minutes).
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WORKSHOP ENDS AT 5:30PM on Dec 09
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6.0 About STG:
Strategic Technology Group (STG) designs, develops and manufactures brushless permanent magnet/BLDC motors and motor
drives for customer specific applications. STG also offers comprehensive analysis of motors, motion control and drive products
and systems. STG helps customers with optimal design selection, sizing and configuration of Motion Control Systems.
STG’s staff has developed critical understanding and published on a wide range of permanent magnet/BLDC motors, motor
control, motor drives, high frequency electromagnetic components, electric vehicles and switch mode power systems. STG’s staff
has co-authored over 30 publications in various refereed journals and conference proceedings and filed for several issued or
pending US patents.
STG has significant skills in the field of motor engineering, mechanical engineering, power electronics, analog and digital
electronics, software engineering, test engineering, manufacturing engineering and system simulation, design and integration.
STG has successfully delivered permanent magnet motors, motor drives and battery management systems in the areas of electric
vehicles, electric bicycles, electric scooters, power wheelchairs and washing machines. STG has in-depth understanding of the
requirements for consumer, medical, automotive and industrial systems.
STG’s staff has extensively pursued technology beyond the traditional three-phase motors by engaging in the design of seven
and five-phase radial as well as axial flux permanent magnet brushless motors.
Figure 5: STG's 5-Phase Falco Motor Technology Offers lowest weight and highest power and torque density in the light electric
vehicle industry today.
STG is head-quartered in the metro Washington DC area with significant research, development and manufacturing capability in
the areas of permanent magnet brushless motors, motor control and motor drive systems. Currently, STG has offices in the US,
UK and India. STG’s research, development and manufacturing are located in Pune, India.
STG has developed a unique and highly successful approach called CARE™ to product development and project management
for complex technology products involving embedded systems, electro-magnetic and electro-mechanical components and power
electronics. Our CARE™ approach has four main elements –
- Clearly defined customer requirements
- Ample focus on analysis, simulation and modeling
- Rapid prototyping
- Effective project management techniques
We bring products to fruition in short time. We combine the best practical, technical and academic knowledge to bring our clients
unique competitive advantages.
Team at STG
STG has a strong and talented engineering team of
Motor engineers
specializing in the design of motors and high frequency magnetic components using FEA (Finite Element Analysis) as well as
analytical methods;
Electrical engineers
specializing in power electronics, analog and digital circuit design;
Mechanical engineers
specializing in 3-D modeling and chassis design with die cast and CNC machined components using SolidWorks;
Software engineers
specializing in algorithm and programming for TI, ST and Microchip DSPs and Micro-controllers;
Embedded engineers
specializing in digital circuit design, Network communication protocol implementation (CAN, RS232, RS485, I2C, MODBUS,
SERCOS, DeviceNet and Profibus), C and C++ programming;
Layout engineers
for designing printed circuit boards for harsh consumer, automotive, medical and industrial applications using PADS™;
Test engineers
for designing customer-specific test stands with National Instrument’s LABVIEW™ Software;
Project engineers
to ensure performance, schedule and cost objectives;
Research & Simulation engineers
to further the understanding in PWM techniques, fuzzy logic, field-oriented, space vector and sensorless control methods;
Manufacturing engineers
specializing in shorter time to production with minimum risk;

Falco 5-Phase motor technology and it includes a Li-ion battery pack and a
wireless vehicle controller
7.0 Our Vision
To bring remarkable and extraordinary value to our customers by helping them, create cutting edge technology products in the
field of Permanent Magnet Motors, Motor Control and Motor Drives and Systems.
8.0 Our Mission
We are committed to the acquisition and application of state of the art knowledge, tools, methods and processes to deliver
greatest value to our customers. We are committed to protecting our customers’ interests with the highest level of integrity and
ethics.
9.0 Our Core Values
Truth: Commitment to facts.
Promise: Commitment to promises made.
Honesty and Integrity: Commitment to honesty and truth by promoting transparency in all dealings.
Fairness and Justice: Commitment to fairness and justice inside and outside the company.

10.0 About the Presenter:
Rakesh Dhawan founded Strategic Technology Group LLC in 2009. He is a twenty two years veteran
of motors and motor drive Industry. He has developed critical understanding and published on a wide
range of motors, motor drives, high frequency electromagnetic components, electric vehicles and
switch mode power systems. He has co-authored over 25 publications in various refereed journals
and conference proceedings and is an inventor on 7 issued or pending US patents. He has served
on the Technical committee of the Applied Power Electronics Conference (APEC). He received the B.
Tech (Electrical Engineering) degree from Indian Institute of Technology (IIT), Kharagpur, India. He
received his MS degrees from University of Minnesota under the tutelage of Power Electronics
pioneer Prof. Ned Mohan. He received his MBA from Old Dominion University.
He has been directly responsible for over twenty five successful product launches in his career many
of them involving brushless permanent magnet motor systems. Rakesh has conducted several
workshops in the recent past in the field of motors and motor drives. His interests include brushless
permanent magnet motor systems, light electric vehicles, electric bicycles, switch mode power
supplies, solar inverters, simulation, statistics, project management and new and ultra-fast product
development methodologies. Rakesh is a high energy individual with a difference; he combines
technology excellence, leadership and professional management skills with his inborn entrepreneurial
instincts.
Rakesh is a member of IEEE and the Entrepreneur’s Organization (Washington-DC Chapter) and is
very keen on nurturing innovation and entrepreneurial talent in the field of technology development
and management.
11.0 Workshop Objectives:
This workshop aims at imparting knowledge of techniques for
developing brushless permanent magnet motor systems. The workshop
has the following objectives:
- Provide the participants training on techniques for simulating,
designing and analyzing brushless permanent magnet motor
systems;
- Allow the participants to evaluate various tools & strategies and
understand practical constraints for different approaches;
- Help the participants learn how to evaluate their brushless
permanent magnet motor systems design procedures and
determine when use of certain methods can be most effective;
- Provide the participants tools and techniques for reevaluating
their current brushless permanent magnet motor systems with
new tools and techniques;
- Demonstrate these methods for various brushless permanent
magnet motor systems;
- Provide working circuits and models.
- Enhance and Advance your knowledge of
brushless permanent magnet motor systems;
- Develop innovative brushless permanent magnet
motor systems;
- Enhance skills of your team in the areas of
brushless permanent magnet motor systems
dramatically;
- Engage in more effective brushless permanent
magnet motor system program management for
your company;
- Dramatically cut development time;
- Predict and eliminate failure rates;
- Improve quality & reliability;
- Innovate with new techniques;
- Reduce cost;
- Improve manufacturability;
- Compare several alternative solutions.
13.0 Who Should Attend?
Motor Engineers (Beginners and Advanced)
Engineering Directors
Engineering Managers
Electrical Engineers
Power Electronics Engineers
System Engineers
Product Development Engineers
Embedded Engineers
14.0 Registration Details:
Price inclusive of all taxes:
Early Bird Price: Rs. 13,995/-, Students: Rs. 4,995, Faculty: Rs. 9,995 (before Nov 25)
Regular Price: Rs. 16,995, Students: Rs. 5,995, Faculty: Rs. 11,995 (after Nov 25)
For Registration:
Visit: http://www.strategictechgroup.com/workshop-brushless-permanent-magnet-motors-motor-drives/ or you may send email to Ms.
Bhumika Dehade at workshops AT strategictechgroup.com with the following details:
Full Name, Company Name, Address, Phone Number and Email Address.
The seats will be reserved after receiving payment
Payment by credit card/check/ or bank transfer in advance in favor of
Strategic Technology Group
Venue:
Le Meridien Pune
15.0 Workshop Deliverables:
- Workshop Workbook
- Slides, Tools and Methods (Softcopy)
- Certificate of Completion
16.0 Cancellation Policy:
If you believe it necessary to cancel your registration, we will issue a full refund minus a Rs. 2500 administration fee for cancellations
received in writing at least 20 business days prior to the event. The registration fee is non-refundable for cancellations made less
than 20 days prior to the event. In those cases, you may transfer your registration fee to a substitute person to attend. Those who
do not cancel and do not attend are responsible for the full registration fee.
Trademarks mentioned in this brochure belong to the respective companies.






Few of the past workshops attendees:
Pictures and Videos from Pune Workshop held in April 2010:
“These workshops from STG are of tremendous value. Our company has learnt so much from these workshops. We have been able to accelerate our product development significantly” – Mark Higgon, Managing Director, Team Hybrid, UK
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“Rakesh reaches to technical depth with minute details which makes him an excellent teacher and presenter. The workshop material is always well organized, clearly presented and all questions are answered professionally. The tutorials/examples covered are not just for academic interests but touch the practical aspects. All the notes and visuals are easy to read. I would love to hear Rakesh again at one of his upcoming workshops.”– Ashish Deshpande, Sr. Technology Specialist, ANSYS
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“The workshop conducted by Strategic Technology Group dealt with topics of high practical importance. The speakers are extremely competent. Rakesh is a consummate speaker and teacher and his presentations were very well received with active participation from the audience. The design and simulation methods are highly useful for practicing Power Electronics design and development Engineers. Rakesh presents great correlation between practice and theory. I highly recommend these workshops.” V. Duraikkannan, Chief product architect, Hasoft Power Electronics
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Early Bird Rs.13,995 (Expires Nov 25) Rs.16,995 (after Nov 25)
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Rs.13,995 (Expires Nov 25) Rs. 16,995 (after Nov 25)
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Rs.13,995 (Expires Nov 25) Rs. 16,995 (after Nov 25)
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Workshop: Schedule: Dec 09, 2011
Brushless Permanent Magnet Motor
Motor Control
Motor Drive Systems
Motor Expert
Permanent Magnet Motors
Modeling
Power Electronics
BLDC Motor Control
Students Rs.4,995 Faculty Rs.9,995 (before Nov 25)
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