Three phase outer rotor Field excited flux switching machine for future hybrid vehicle\'s

In the present time in highspeed applications, a profound role had been played by the flux switching machines. Rather than, the flux sources (Field excitation Coil and Armature Winding or Permanent Magnet) entirely embedded in the stator in flux switching machines and leaving the rotor completely pa

Project Title

Three phase outer rotor Field excited flux switching machine for future hybrid vehicle\'s

Project Area of Specialization

Electrical/Electronic Engineering

Project Summary

In the present time in highspeed applications, a profound role had been played by the flux switching machines. Rather than, the flux sources (Field excitation Coil and Armature Winding or Permanent Magnet) entirely embedded in the stator in flux switching machines and leaving the rotor completely passive thus making the FSM more suitable for industrial applications. Salient rotor pole and non-overlapping winding embedded in electrical machine design possess some pertinent features, namely (a) reduce copper losses, (b) low-cost, and (c) usage in highspeed applications. Therefore, this project emphasizes the design of a three-phase outer rotor field excitation flux switching machine (ORFEFSM) employing salient rotor pole and non-overlapping winding for hybrid electric vehicle (HEV’s) drives with reduced cost, compared with internal permanent magnet machines (IPM). Further, the feasibility design analyzes the outer rotor FEFSM based on 2D- FEA using the three-phase behavior of the proposed machine. Moreover, coil tests will be performed and investigated machine behavior, such as (a) cogging torque, (b) flux linkage, (c) average torque, (d) induce emf, and (e) iron and copper losses. Internal Permanent Machine (IPM) is successfully installed and commercialized for HEV’s by the Toyota Prius company. Therefore, a deterministic optimization technique will be adopted in this study that assisted in the enhancement of power, torque, and efficiency compared to existing IPM and 6-slot7-pole NSWFS machines The performance parameter of IPM and 6-slot7-pole NSWFS are the benchmark.

Project Objectives

• To design an Outer rotor FEFSM and investigate its operating principle
• To examine and analyze the significance of the new machine; the torque characteristics, iron losses, copper losses of windings, and efficiency should be examined
• To optimize the outer rotor FEFSM and compare the simulation results with the already existing design that installs in HEVs

Project Implementation Method

• Literature review of FSM and ORFEFSM.
• 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 2D- FEA solver for such type of designing. Geometry Editor is used for drawing of the stator, rotor, FEC, and armature coil of the outer ORFEFSM design. After, JMAG Designer is used for the setup of conditions, material, properties of machine, and circuit. Stator and rotor body are designed using electrical steel 35H210.  
• Optimization Problem
• Cost Minimization
  • Maximization of Output torque
  • Minimization Copper Losses

Benefits of the Project

An outer rotor structure gives better torque density than an inner rotor one at the low-speed in-wheel 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 incorporated minimum torque ripple and high torque density. The inner rotor machine can belt with a combustion engine. ORFEFSM used in HEV in the wheel has 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

An outer rotor structure gives better torque density than an inner rotor one at the low-speed in-wheel 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 incorporated minimum torque ripple and high torque density. The inner rotor machine can belt with a combustion engine. ORFEFSM used in HEV in the wheel has advantages to eliminate mechanical transmission, drive belts, and differential gears and has high efficiency, increased vehicle space, and weight reduction.

Final Deliverable of the Project

HW/SW integrated system

Core Industry

Transportation

Other Industries

Others

Core Technology

Clean Tech

Other Technologies

Shared Economy

Sustainable Development Goals

Affordable and Clean Energy

Required Resources

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