Syed Muhammad Naufal Syed Othman

Performance Comparison of 12S-14P Inner and Outer Rotor Field Excitation Flux Switching Motor

Hybrid excitation flux switching machines (HEFSMs) have a several advantages such as robust rotor structure, high torque and power capabilities, and high efficiency suitable for light load and heavy industry applications. However, the general structure of HEFSMs employed with three main flux sources namely permanent magnet (PM), field excitation coil (FEC) and armature coil located on the stator body causes high manufacturing cost. Therefore, a new non-PM field excitation flux switching machine (FEFSM) consists of rugged rotor structure suitable for high-speed operation with capability to keep similar torque and power density of HEFSM is proposed and examined. In this paper, performances of both outer and inner rotor 12S-14P FEFSMs are analyzed and compared. As conclusion, the inner-rotor topology provides much higher torque and power when compared with outer rotor configuration.

Design optimization of single-phase outer-rotor hybrid excitation flux switching motor for electric vehicles

Nowadays, in-wheel motors applied in pure electric vehicles (EVs) propulsion systems have attracted great attention in advance research and development. In-wheel direct drive eliminates the mechanical transmission, differential gears and drive belts. Thus, in-wheel direct drive provides quick torque response, higher efficiency, weight reduction, and increased vehicle space. As one of alternative, a new design of hybrid excitation flux switching motor (ORHEFSM) for in-wheel drive EV is proposed. In this paper, the optimization design of single-phase 8S-4P outer rotor HEFSM is analysed. Open and close circuit of initial and final design is compared based on 2-D finite element analysis (FEA). The optimized design motor has produced higher torque which is 138.18Nm with 22.2% improvement compared to initial design motor which is 107.5Nm and has achieved the target value which 111Nm. The initial maximum power achieved was 17.02kW, while for the improved design motor, it has increased to 41.81kW, since the target maximum power is 41kW. The design optimization has been made on the initial design machine shows that there is great enhancement on torque and power.

An innovative off-grid permanent magnet flux switching generator for micro gas turbine in rural areas

This digest reviews extensively on preliminary analysis to obtain a 30 kW electric power generator and to apply Bio-methane to use it directly to micro gas turbine for electricity generation.

Primary study of a new permanent magnet flux switching machine over straight and spanned rotor configurations

Purpose The purpose of this paper is to address a fundamental study and performance analysis of a proposed 6Slots-10Poles permanent magnet flux switching machine (PMFSM) using straight rotor (StR) and 6Slots-8Poles PMFSM with spanned rotor (SpR) structure. Design/methodology/approach Design configuration of the proposed machine was developed using commercial finite element analysis package and JMAG-Designer V.14 software, which provides two-dimensional finite element solver throughout the investigation. An electromagnetic performance analysis is carried out and compared over the two proposed topologies which consist of machines no-load and under-load conditions. Findings This paper demonstrates the finding of the proposed StR structure which consist of more favorable three-phase sinusoidal feature, lower cogging torque and higher output torque. Flux density attributes reveal higher established magnetizing flux concentration in StR compared with SpR. Consequently, the StR structure requires low armature current before it may start to rotate and provides better robust construction with less material consumption and cost. Originality/value This paper describes the novel design of a new PMFSM configuration pertinent for high-speed applications.

Rotor pole analysis for 12slot outer-rotor field excitation flux switching motor(ORFEFSM) for electric vehicle

Direct-drive is one of the in-wheel application that evolve enormously for full electric vehicle where it still require a lot of improvement and as an alternative especially on the outer-rotor field excitation flux switching motor. Furthermore, to reduce the usage and dependence of permanent magnet such as ferrite magnet, FE2O3 and neodymium an alternative is needed. Besides, without permanent magnet there will be no demagnetization occur. Hence, in order to determine the suitable and the best slot-pole configuration, a no-load and load analysis should be done using 2-D FEA. The first part will be introduction of flux switching motor and the calculation related to designing. After that an overview of the basic design parameters and specifications scheme will be explained. The main part presents an important review of no-load analysis and load analysis for electric vehicle applications. The review is very important to provide guidelines and insights for future research and development on this design for sustainable reliability and energy efficient EV applications. Furthermore, in this review shows the initial design and analysis before further to optimization process.

Initial design of 12S-10P outer-rotor field excitation flux switching motor with different rotor width

This paper proposes an initial design of 12 slot, 10 pole outer-rotor field-excitation flux switching motor (FEFSM) with two different rotor width based from 2 different formula to design the rotor width. Hence, initial design include the three coil test to determine the U, W, V-phase, the flux strengthening and weakening, flux at various armature coil and field-excitation coil current, and finally the torque at various JA and JE. As for the materials, the stator and rotor consists of steel sheets made of electromagnetic steels, copper for armature coils and field excitation coils as the only field for magnetic flux source. There will be some design specification and restriction on outer-rotor FEFSM based on 2D-Finite Element Analysis will be applied to design the proposed machine.

Design study and performance analysis of 12S-14P field excitation flux switching motor for hybrid electric vehicle

This paper presents a new structure of 12slot-14pole field excitation flux switching motor (FEFSM) as an alternative candidate of non-Permanent Magnet (PM) machine for HEV drives. Design study, performance analysis and optimization of field excitation flux switching machine with non-rare-earth magnet for hybrid electric vehicle drive applications is done. The stator of projected machine consists of iron core made of electromagnetic steels, armature coils and field excitation coils as the only field mmf source. The rotor is consisted of only stack of iron and hence, it is reliable and appropriate for high speed operation. The design target is a machine with the maximum torque, power and power density, more than 210Nm, 123kW and 3.5kW/kg, respectively, which competes with interior permanent magnet synchronous machine used in existing hybrid electric vehicle. Some design feasibility studies on FEFSM based on 2D-FEA and deterministic optimization method will be applied to design the proposed machine.

Design comparison of single phase outer and inner-rotor hybrid excitation flux switching motor for hybrid electric vehicles

In hybrid excitation machines (HEMs), there are two main flux sources which are permanent magnet (PM) and field excitation coil (FEC). These HEMs have better features when compared with the interior permanent magnet synchronous machines (IPMSM) used in conventional hybrid electric vehicles (HEVs). Since all flux sources including PM, FEC and armature coils are located on the stator core, the rotor becomes a single piece structure similar with switch reluctance machine (SRM). The combined flux generated by PM and FEC established more excitation fluxes that are required to produce much higher torque of the motor. In addition, variable DC FEC can control the flux capabilities of the motor, thus the machine can be applied for high-speed motor drive system. In this paper, the comparisons of single-phase 8S-4P outer and inner rotor hybrid excitation flux switching machine (HEFSM) are presented. Initially, design procedures of the HEFSM including parts drawing, materials and conditions setting, and properties se...