Design and Analytical Modeling Of Outer Rotor Flux Reversal Machine

The whole world is working on how to control global warming, climate change and other environmental pollution by reducing emission of carbon and other harmful gases to the environment. As vehicle also produce a considerable friction of harmful gases like (CO2), which cause greenhouse effect & gl

Project Title

Design and Analytical Modeling Of Outer Rotor Flux Reversal Machine

Project Area of Specialization

Electrical/Electronic Engineering

Project Summary

The whole world is working on how to control global warming, climate change and other environmental pollution by reducing emission of carbon and other harmful gases to the environment. As vehicle also produce a considerable friction of harmful gases like (CO2), which cause greenhouse effect & global warming, and produce environmental pollution. On the other hand, with increase in population, demand for personal vehicles also increasing. The increase in demand of vehicle is alarming for the environment. The Internal combustion engine has drastic effects on the environment. So, converting the fuel vehicle into EVs & HEVs is the only way to tackle the problem. As the most important component for electric vehicle drive system is an electric motor with high power density, high torque, and constant power at different speed characteristics. The successfully installed system in HEVs are Switch Reluctance Machines, DC machines and Permanent Magnet Synchronous Machines. Induction machines have low cost, high reliability, low maintenance, and rugged structure, and can be employed in electric vehicle drive system. However, disadvantages of induction machines are low power factor, high losses, low usage factor for inverter, and low efficiency. An outer rotor flux reversal machine (ORFRM), which has a larger torque density and a smoother torque waveform than the conventional FRM, is introduced. The FRM has the same combinations of stator and rotor slots, winding pole pair, and permanent magnet (PM) usage as the conventional FRM. PMSMs have high torque and better efficiency but they have demerits of demagnetization, complex structure and permanent magnet cost, which is difficult to optimize. Investigating different performance parameters on No load like flux linkage, back EMF, cogging torque, air gap, flux density. However, on loaded condition will be analyzed electromagnetic torque, instantaneous torque, copper & iron loss, efficiency, thermal and stress analysis. Furthermore, verified all the above performance characteristics through analytical modeling. The proposed outer rotor FRM will be compared with the inner rotor design.

Project Objectives

1. Investigating operation of ORFRM
2. Performance analysis
i. Flux linkage
ii. Back EMF
iii. Cogging Torque
iv. Air gap Flux density
v. Harmonics
vi. Average Torque
3. Optimization
4. Analytical Modelling
5. Thermal Modelling & Stress Analysis.

Project Implementation Method

The Research methodology will be:
? Literature review of FRM and ORPMFRM. 
? Rotor pole study. 
? Evaluation performance of machine such as: (a) Coil Test analysis at no load (b) 
Flux Linkage (c) Cogging Torque (d) Instantaneous torque (e) Average 
electromagnetic Torque (f) PowerTorque density (g) Copper losses (h) Efficiency. 
? Modeling
? Japan Research Institute released JMAG Design 14.1 version, utilized as 2DFEA solver for such type of designing. Geometry Editor is used for drawing of
the stator, rotor, FEC, and armature coil of the outer ORFEFRM design. After, 
JMAG Designer is used for setup of conditions, material, properties of 
machine and circuit. Stator and rotor body are designed using electrical steel 
35H210.
? Optimization Problem
? Maximization of Output torque
? Minimization Copper Losses
Optimization Scheme: Deterministic Optimization Technique.

Benefits of the Project

An outer rotor structure gives better torque density than inner rotor one at low-speed inwheel drive and is in this way especially the best candidate for in-wheel applications, 
which also provide additional advantages such as compactness and high efficiency for 
electric vehicles. The inner rotor non-overlapping stator wound field synchronous machine 
that incorporated minimum torque ripple and high torque density. The inner rotor machine 
can belt with a combustion engine. ORFRM used in HEV in wheel have advantages to 
eliminate mechanical transmission, drive belts, and differential gears and has high 
efficiency, increased vehicle space, and weight reduction.

Technical Details of Final Deliverable

With increase in population, demand for personal vehicles also increasing. The increase in demand of vehicle is alarming for the environment, As Internal combustion engine has drastic effects on the environment. Converting the fuel vehicle into EVs & HEVs is the challenging task [1]. As the fuel consumption produce a lot of heat as well as harmful gases specially CO2, which cause depletion of ozone layer, and is harmful for our lives. So, to avoid the risk, a better way is to introduce EVs and HEVs by developing electric machine. The PMFRMs is brushless and energized by permanent magnet. flux- reversal permanent magnet (FRPM) machine that is amenable for high-speed operation. The low pole topology of high-speed machine is favorable to minimize fundamental frequency requirement and are widely used in industrial and vehicular applications for the benefits of reduced size and weight and increased power density. Flux-reversal permanent magnet (FRPM) machines are under active research nowadays [2]. Being one of the most promising topologies for stator-mounted PM synchronous machine. Stator-slot/rotor-pole pair combination principle of flux-reversal permanent magnet machines is proposed considering both magnetization modes and magnetic flux leakage effects. Hence, it can be concluded that general and comprehensive design principles of slot/pole combinations for FRPM machines are rather lack, which causes difficulty for designers to determine proper slot/pole combinations of FRPM machines. Therefore, a general and comprehensive slot/pole combination principle for FRPM should be proposed [3]. In the past, EVs were define variously, specially they were classified into two categorize. Pure EVs, powered by battery, let fly by electric motor only and HEVs, powered by batteries as well as by liquid fuel, let fly by both electric motor as well as by engine. After the invention of fuel cell, ultra-capacitor and high-speed flywheel, it further classified as Battery Electric Vehicles (BEVs), powered by batteries only with propulsion source of electric motor, Fuel Cell EVs (FCEVs), powered by batteries and fuel cell with propulsion source of electric motor only. And Hybrid Electric Vehicles, powered by both liquid fuel and batteries, let fly by Electric Motor and Engine as well [5]. As a result, even a small motor can have high power output. HPDM are also known as low speed high torque motors. The HPDM are compact, lightweight, has high torque and less cogging torque application in automotive field, especially in Electric vehicles (EVs) [6].

Final Deliverable of the Project

Software System

Core Industry

Manufacturing

Other Industries

Energy

Core Technology

Others

Other Technologies

Robotics

Sustainable Development Goals

Good Health and Well-Being for People

Required Resources

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