|A unique opportunity for an extraordinary level of
Strategic Technology Group LLC
Design, Development and Manufacturing of Brushless
Permanent Magnet Motors, Motor Control & Motor Drives
|Phone: Toll Free US (877) 592-4848 Fax: Toll Free (888) 453-0997
Copyright © 2009 - 2010 STG All rights reserved.
|“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. ”
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
specializing in the design of motors and high frequency magnetic components using FEA (Finite Element Analysis) as well as
specializing in power electronics, analog and digital circuit design;
specializing in 3-D modeling and chassis design with die cast and CNC machined components using SolidWorks;
specializing in algorithm and programming for TI, ST and Microchip DSPs and Micro-controllers;
specializing in digital circuit design, Network communication protocol implementation (CAN, RS232, RS485, I2C, MODBUS,
SERCOS, DeviceNet and Profibus), C and C++ programming;
for designing printed circuit boards for harsh consumer, automotive, medical and industrial applications using PADS™;
for designing customer-specific test stands with National Instrument’s LABVIEW™ Software;
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;
specializing in shorter time to production with minimum risk;
Falco's 5-Phase motor technology with a Li-ion battery pack and a wireless
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.
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
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.
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
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
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
- 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
- Enhance skills of your team in the areas of
brushless permanent magnet motor systems
- Engage in more effective brushless permanent
magnet motor system program management for
- Dramatically cut development time;
- Predict and eliminate failure rates;
- Improve quality & reliability;
- Innovate with new techniques;
- Reduce cost;
- Improve manufacturability;
- Compare several alternative solutions.
Who Should Attend?
Motor Engineers (Beginners and Advanced)
Power Electronics Engineers
Product Development Engineers
Click here 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
A-105, H-Block, Near Bharat Gas Agency (Morwadi Court),
MIDC Pimpri, Pune-411018.
09223586428/ 09223504845 / 09223504847 / 09223504828
Courtyard Marriott Pune City Centre
C.TS. No. 37 & 37/1, Bund Garden Road ·
Pune, Maharashtra, 411001 India
- Workshop Workbook
- Slides, Tools and Methods (Softcopy)
- Certificate of Completion
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
|“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
|“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
V. Duraikkannan, Chief product architect, Hasoft Power Electronics
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.
Extensive research has 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
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.
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.
|April 19, 2012 - Schedule
||April 20, 2012- Schedule
|9:00 - 9:30AM
||9:00 - 11:00AM
||Software Development Principles for
8-bit and 32bit Processors;
Example Code for 8-bit Micro-controller;
Example Code for 32-bit DSP;
Agile Software Development Principles.
|9:30 - 12:30AM
||Dynamic Model of a Permanent Magnet
1. d-q model of the motor;
2. Experimental Determination of the d-q
3. Simulation Examples.
|11:00 - 12:30
|12:30 - 1:30PM
|1:30 - 5:30PM
1. Six Step Control using;
2. Basic Sinusoidal Control;
3. Field Oriented Control;
4. Space Vector Modulation;
5. Incorporating Field Weakening;
6. Simulation Examples using PSpice.
|1:30 - 4:00PM
||Power Stage Design
1. Motor Drive Topologies;
2. Multi-level Converters;
3. Matrix Converters;
4. Component Selection;
5. Power Stage Layout
6. EMI/RFI Considerations;
7. EMI Filter Design
|4:00 - 5:00PM
||Quick Review of Existing Motor
|5:00 - 5:30PM
||Thermal Analysis Fundamentals
|Workshop Certificates Being Handed Out at the end of the Workshop
|Attendees at the December Workshop