Optimal Motor Design & Computational Electromagnetics

Electrical Machines Design Technology

Name: Dr. NARAYAN KASHIRAO DESHMUKH

E-Mail: **********@*****.***

M: 981-***-****

Address: Flat no. 1603, Building no 1E, India Bulls Greens, Panvel, Navi Mumbai, Maharashtra, India-Pincode-410206

Keywords: Head Analytics Centre, Electromagnetics, FEA, OPTIMIZATION, DOE, Technology, Optimum Design of Motors (all types), Crompton Greaves

FOREWORD: I am a doctorate in Computational Electromagnetics from I.I.T. Bombay way back in 1984. Apart from conventional design of motors, I have rich experience in Finite Element Analysis & optimization techniques. As is well known, the analysis of electrical devices involves fluid-flow coupled thermal analysis interlaced with thermal coupled electromagnetic analysis which should account for nonlinear and hysteresis loop B-H relationship. The efficiency or average temperature rise ought to be predictable within +-5% of mean test results that too taking into account variations due to material, ambient test conditions, and stresses in material during manufacturing. My background in Electromagnetics helps me tackle diffusion and wave equations. The task seems daunting but needs to be achieved. I have 30+ years of experience in R&D of electrical industry and about 4 years of experience in teaching.. I am capable, healthy and hearty and can put up a decade or more of useful work. I am not sensitive about designation and would accept any level of management, provided pay is lucrative. I am interested in research and development of all types of motors and or transformers. I propose to settle in the place wherever my next job takes me

PROFESSIONAL PROFILE

A Doctorate in Computational Electromagnetics from Indian Institute of Technology Bombay in 1984.

Expert in optimal design of motors (induction single and three phase, PM, Reluctance) & Alternators

Expert in electromagnetic Finite Element Analysis & Optimization Techniques

Use conventional design with global optimization techniques & FEA with DOE (Taguchi Tables)

Demonstrated 10 to 20% savings in active material cost of motors with performance within +- 5%.

Experience in guiding and solving multi-disciplinary design problems

Demonstrated 0.2 units predicted efficiency over and above premium efficiency of induction motor keeping starting current within limits

Experienced in digging, collection, cleaning, presentation of data. Fitting patterns to data and extrapolating to arrive at futuristic predictions constituting Business Intelligence and Machine Learning.

Trained in Taguchi Methods, Design of Experiments, QFD, House of quality, DFMEA & SPC etc.

Guided and managed a team of 14 to 20 engineers in Analytics centre

Well organised with a track record that demonstrates self-motivation, creativity, and initiative to achieve goals.

Recently conceived an idea that will result in around 20% reduction in material content of 3 phase induction motor

Experienced in guiding multi-disciplinary design analysis such as stress analysis and fluid-flow based thermal analysis

Design expertise in dual rotor axial flux motors apart from radial flux motors

Experience in Doubly Fed Induction Generator (DFIG) cost effective for wind energy tapping

Currently designing PMSM for a client

UNIQUE CONTRIBUTIONS

1.Developed & Patented a capacitive choke enabling ignition of fluorescent tube at lower voltage

2.Accurate Computation of the Saturation Factor using under relaxation.

3.The calculation of end winding leakage using analytical expression for inductance of a circular loop.

4.Global Optimization using Genetic Algorithms and Random Walk.

5.Computation of major component of stray loss in motors as that caused due to rotor eddy currents induced by 5th and 7th space harmonic.

6.Development of a software for accurate computation of core loss in motors considering superposition of flux due to space harmonics.

7.On a number of occasions, carried out collection of raw data, cleaned it, fitted a pattern (polynomial, exponential and/or cyclical), using least squares technique; extrapolation in order to predict the future scenario useful for business analysis, AI, ML, etc..

Other Interests:

1 Quality Function Deployment, house of quality, Competition analysis, Bench marking

2 Fluid-flow based Thermal network Analysis

3 Optimum Product Design (General)

4 --> Data Analysis

5 Ferro resonance in CCVT, Modelling and Analysis of arc and its quenching in circuit breakers

6 -> Teaching

PUBLICATIONS

Distinction of having papers published in journals & conferences.

-‘Finite element analysis of three-dimensional eddy currents in attractive electromagnetic levitation’, proc. IEE, vol.184, pt A, no8, Sep’87.

-Impulse voltage strength of disc winding in EHV Power Transformers, Trafotech 1986.

-‘A straight forward front-width reduction program’, proc. of Electrosoft-90, USA.

-‘CAD package (ESMAP-2D) for finite element solution of electrostatic and electromagnetic field problems’, presented at IEEE winter power meeting, 1990, Delhi.

-Interturn Insulation Stress in Double Section coils of HV Motors: A comparative study, international conference, London.

-‘Thermal analysis of oil cooled transformers’ presented at CIGRE conference 29th Aug- 3rd Sep’04, Paris.

-Stress analysis of transformer (core coil assembly and tank) under transport condition, presented at CBIP conference, New Delhi, 2006-07).

-Hot-spot analysis in transformer (windings) using FEM, presented at CBIP conference, New Delhi, 2006-07).

-Computation of stray losses in GSU transformers, presented at XX Symposium on Electromagnetic Phenomena in Nonlinear circuits (EPNC), July 2nd to 4th, 2008, Lille, France, pp 83-84.

-Genetic algorithm based global optimization for induction motor, ELROMA-08.

-Prediction of stray load losses in furnace transformers using 3_D finite element analysis, Trafotech -2010, Secion I, pp 14-18

-Paper on iron loss prediction of Induction motors accepted in a Russian Journal.

-Paper determination of iron loss considering spatial harmonics and Tooth Pulsation Effects for cage Motor, to be presented by co-author in international conference ICRERA Milwaukee, USA

-“A Short Note on Consideration of Skew In a 2-D Solution of Cage Induction Motor” published in International conference on Communication, Electronics and Electrical Engineering (ICCEEE), held AT Navi Mumbai, India on 10th October, 2020

-Proposing papers on 1. accurate computation of saturation factor

2. Application of a new idea to reduce material content of IM by about 20%

SCHOLASTICS

1984 Ph.D. (Computational Electromagnetics, & Finite Element method) from Indian Institute of Technology, Bombay

1974 B.E. (Electrical) from M.A.C.T. Bhopal (Secured 77.2% with distinction)

PROFESSIONAL AFFILIATIONS: Ex-IEEE member, Ex-Cigre member, IEEE reviewer

IT SKILLS

Packages: Magnet, ANSYS, MS Office, RmXprt, Maxwell, MS Excel, Matlab, AutoCAD, Solid-works

Programming Languages: FORTRAN, C, Borland C++, Visual C++, VB.NET, vs.net, HTML5

Operating Systems: DOS, UNIX, Windows 11

CONTACT DETAILS

M: +91-098******** E-Mail: **********@*****.***

Address: Flat no. 1502, 18E, Indiabulls Greens, Panvel, adjacent to Navi Mumbai, Maharashtra, India

CAREER SUMMARY

July’18- to date

Freelance Consultant

Highlights: Provided an optimum design for Permanent Magnet generator to a customer. Developed motor(3phase Induction) and transformer design optimization software at home yielding 5-20% saving in material cost. Currently seeking a full-time/part time job. Has an idea which will reduce material content in three phase induction motor. Provided design of Universal (AC Series) Motor.

July’15-jun’18

Professor at MGM’s College of Engineering & Technology, Kamothe, Navi Mumbai, 410209

Highlights: Taught B.E. students

Nov’06-Jun’15

CROMPTON GREAVES LTD., MUMBAI, INDIA. Consultant to Analytics Centre of Global R&D

Highlights: Guidance to junior engineers in modelling and simulation of Problems involved in design of Motors, transformers, alternators, and other electrical products. Development of global optimization technique based on Genetic Algorithms and Random Walk. Application of the same to various products.

Nov’05-Sep’06

EMCO LTD., THANE, INDIA

Vice President (Transformer Technology)

Highlights: Development of software for design optimization of transformers and Reactors.

1985-2005

CORPORATE R&D Of CROMPTON GREAVES LTD., KANJUR, Mumbai, INDIA

Deputy General Manager & Head of Analytical Lab,

Highlights: Development of ESMAP-2D, a generalised software package based on Finite

Element Method, for simulation of Electromagnetic & Electrostatic problems.

Automation of Transformer design to drawings process reducing lead time from a few

weeks to a few hours.

Initiation and use of optimization techniques for design optimization of Transformers,

Motors. And Alternators. capacitive choke design (had a patent) to enable ignition of

Florescent tube at lower voltage.

1984-2005

K. K. W. ENGINEERING COLLEGE, NASHIK, INDIA

Professor, CTC INR 30000

Highlights: teaching first year BE students & setting up college

1981-1984

R&D OF BHARAT BIJLEE LTD., BOMBAY, INDIA, Assistant Engineer, CTC INR 25000

Highlights: Development of Linear Torque Motor

1980-1981

I.I.T. Bombay, INDIA

Senior Research Assistant

Highlights: Assisting Professor in Tutorials.

MAJOR PROJECTS

Developing a software package for generalised 2-D finite element analysis of electrostatic & electromagnetic field problems involved in the design of electrical devices (in-house usage at CGL & customized versions).

Development of the optimization programs for conventional design of induction motor (3phase & 1phase),

Patent on capacitive ballast for florescent lamp to enable lighting of the tube at low voltage (160 volts) & limiting current at higher voltages.

Creating custom-built FEA programs for time harmonic analysis of induction motor

Optimizing design considering air delivery, wind age loss & noise of cooling fan for TEFC induction motors.

Guidance in FE analyses using ANSYS, MAGNET, ELECNET, RmXprt, Maxwelll, packages for thermal, fluid-flow(arc quenching) & structural problems in electrical devices, including motors.

Guidance for the projects on mechanical design-drafting lead-time reduction using 3D CAD packages solid-works, inventor and AutoCAD through customization of software.

Overseeing projects on mechanical design-drafting lead-time reduction using 3D CAD packages solid-works, inventor and AutoCAD and customization software.

Successfully developed

-Algorithm & software for global optimization technique based upon real vector coded genetic algorithms giving 5 to 30% cost reduction applied the same to motors.

-Design-analysis methodology for 1.5 MW DFIG.

-Design-analysis software for axial flux exciter and radial flux main alternator.

-Software for more accurate prediction of iron loss & stray load loss for induction motor

-Recently a novel idea has occurred to me, which if successful, will reduce material content in Induction motor significantly.

Effectively provided

-Methodology for a state-of-the-art design analysis software for accurate prediction of performance of 3-phase & single phase induction motors considering MMF space harmonics (one patent filed).

-Guidance to predict stray load loss in power transformers (one paper in international conference).

-Optimum designs for motors including induction generator.

-Developed a unique methodology to determine saturation factor at each load.

-Discovered a formula for inductance of circular loop and used the same for calculation of end winding leakage reactance.

-Developed a real vector coded genetic algorithm and applied to motors giving 2% more than premium efficiency.

SOFTWARE DEVELOPED

ESMAP-2D, generalized electromagnetic & electrostatic package for 2-D finite element analysis of electrical devices.

Software for design analysis & design-to-drafting automation of industrial transformers; design analysis & optimization of gapped core reactors; design analysis software for single phase induction motor.

Software for design analysis & optimization of series reactor, arc furnace transformer, industrial range and power transformers, resin-cast transformer, dry type transformer, etc.

Customized software for prediction of inter-disc stresses under impulse condition for power transformers.

Software for lumped-parameter-based fluid-flow coupled thermal analysis of power transformers.

Design analysis and optimization software for 3-phase induction motor using genetic algorithms; design analysis software for ceiling fan motor.

Excel based design analysis procedure for doubly fed induction generator (DFIG); excel based design analysis procedure for axial-flux exciter coupled with radial flux Alternator.

Software for design analysis and optimization of BLDC motors in progress; software for single phase axial flux induction motor for ceiling fan in progress.

Software for design analysis & design-to-drafting automation of industrial transformers; design analysis & optimization of gapped core reactors; design analysis software for single phase induction motor.

Design analysis and optimization software for 3-phase induction motor using genetic algorithms; design analysis software for ceiling fan motor.

Excel based design analysis procedure for doubly fed induction generator (DFIG); excel based design analysis procedure for axial-flux exciter coupled with radial flux Alternator.

Software for design analysis and optimization of BLDC motors ; software for single phase axial flux induction motor for ceiling fan in progress.

OTHER ASSIGNMENT: Involved as Examiner to M.Tech. at I.I.T. Mumbai & VJTI Mumbai a few times.

PERSONAL DETAILS

Nationality : Indian

Languages known : Marathi (native), Hindi, English

Passport : M7434050

Skype ID : live:c76e669fe5aa0ba0

D.O.B. : July 1951

References available on request

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