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

2015 ◽  
Vol 773-774 ◽  
pp. 771-775 ◽  
Author(s):  
Syed Muhammad Naufal Syed Othman ◽  
Erwan Sulaiman ◽  
Faisal Khan ◽  
Zhafir Aizat Husin ◽  
Mohamed Mubin Aizat Mazlan
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
General Structure ◽  
Performance Comparison ◽  
Manufacturing Cost ◽  
Light Load ◽  
Outer Rotor ◽  
Excitation Coil ◽  
Field Excitation ◽  
Rotor Structure

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.

scholarly journals Performance Comparison between Salient and Segmental Rotors Single-Phase FEFSM Using Non-Overlap Windings for Home Appliances

2018 ◽  
Vol 7 (4.30) ◽  
pp. 189
Author(s):  
M. F. Omar ◽  
E. Sulaiman ◽  
H. A. Soomro ◽  
L. I. Jusoh
Keyword(s):  
High Speed ◽  
Single Phase ◽  
Flux Line ◽  
Performance Comparison ◽  
Flux Linkage ◽  
Element Analysis ◽  
Copper Loss ◽  
Field Excitation ◽  
Low Torque ◽  
Rotor Structure

Field excitation flux switching machines (FEFSMs) in which their torque performance produced by interaction between armature and field excitation (FE) coils have been widely designed for various applications. In this regard, three-phase salient rotor FEFSM with overlap windings is considered the most suitable candidate for high speed applications because of their advantages of flux controllability, and robust due to single piece of rotor structure. However, the overlap windings cause a high copper loss, hence efficiency of the motor becomes low and higher stack length. Besides, the salient rotor structure is found to produce low torque performance due to the longer flux path in stator and rotor yielding weak flux linkage. In this paper, a new single-phase FEFSM using non-overlap windings between armature coils and FE coils is proposed. Both non-overlap windings FEFSMs with salient and segmental rotors have been designed using JMAG Designer version 15 and the investigation process is conducted via 2D finite element analysis. The proposed motor performances verification has been done by comparing the results of flux linkage, flux line and distribution, flux strengthening, various torque capability, and torque-power versus speed characteristics. As a conclusion, single-phase non-overlap windings FEFSM using segmental rotor with power, torque and speed capabilities of 277.5 W, 0.91 Nm and 2,899 rpm, respectively considered as the best candidate for low torque high speed applications.

Magnetic Flux Analysis of E-Core Hybrid Excited FSM with Various Rotor-Pole Topologies

2014 ◽  
Vol 695 ◽  
pp. 774-777
Author(s):  
Siti Nur Umira Zakaria ◽  
Erwan Sulaiman
Keyword(s):  
Magnetic Flux ◽  
High Speed ◽  
Flux Distribution ◽  
Flux Analysis ◽  
Flux Linkage ◽  
Cogging Torque ◽  
Excitation Coil ◽  
Rotor Pole ◽  
Field Excitation ◽  
Flux Path

This paper presents magnetic flux analysis of E-Core Hybrid Excited FSM with various rotor pole topologies. The stator consists of three active fluxes sources namely armature coil, field excitation coil and permanent magnet, while the rotor consists of only stack of iron which is greatly reliable for high speed operation. Initially, coil arrangement tests are examined to validate the operating principle of the motor and to identify the zero rotor position. Then, performances of 6S-4P, 6S-5P, 6S-7P and 6S-8P E-Core HEFSMs such as flux path, flux linkage, cogging torque and flux distribution are observed. As conclusion, 6S-5P and 6S-7P designs have purely sinusoidal flux waveform and less cogging torque suitable for high torque and power motor.

Design of Power Density Improvement by Applying Novel Shape of Slit and Notch to Outer Rib of Rotor of Spoke-type Permanent Magnet Synchronous Motor

2018 ◽  
Vol 12 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Hyungkwan Jang ◽  
Sooyoung Cho ◽  
Kang Seok Lee ◽  
Ye Jun Oh ◽  
Ju Lee
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
Power Density ◽  
High Speed ◽  
High Efficiency ◽  
Magnetic Flux Leakage ◽  
Manufacturing Cost ◽  
Washing Machine ◽  
Finite Elements Analysis ◽  
Flux Leakage

Objective:In this study, improvement of power density by applying novel shape of slit and notch to outer ribs of a rotor that reduces magnetic flux leakage in outer rib and increases air-gap magnetic flux density for spe PMSM for a washing machine, was investigated.Methods:It is important that motors for home appliance require lower manufacturing cost, high power and high efficiency. In order to increase power, rotor shape is re-designed. In the outer rib of the rotor, magnetic flux leakage occurs by permanent magnet and magnetic flux is saturated which is one of the factors that reduces the power and efficiency. However, if the outer rib is designed to be too thin, the permanent magnet may scatter during high-speed rotation. Therefore, a design considering permanent magnet scattering is necessary. Motor for a washing machine has two operating points that washing mode at constant torque point and dehydrating mode at high-speed point.Conclusion:For improvement of higher power density, 2-D finite elements analysis was performed to optimize the parameters of the shape of slit and notch to increase the torque. The torque increases by optimizing width and length of slit shape and notch shape. Finally, with the optimized parameters of shape of slit and notch, stack length was adjusted as per torque requirement for a washing machine motor and power density increases considering the safe factor from stiffness analysis.

Design Improvement of Three Phase 12Slot-14Pole Outer Rotor Field Excitation Flux Switching Motor

2017 ◽  
Vol 8 (1) ◽  
pp. 239
Author(s):  
S.M.N.S. Othman ◽  
M.Z. Ahmad ◽  
J.A. Rahim ◽  
F.S. Bahrim ◽  
E. Sulaiman
Keyword(s):  
Power Output ◽  
Optimization Method ◽  
Active Part ◽  
Flux Flow ◽  
Deterministic Optimization ◽  
Design Improvement ◽  
Outer Rotor ◽  
Excitation Coil ◽  
Field Excitation ◽  
Flux Switching Motor

This paper present with design improvement of 12Slot-14Pole outer rotor field excitation flux switching motor (ORFEFSM) from the initial design by implement Deterministic Optimization Method (DOM) which involve 2-dimensional Finite-Element Analysis (FEA). The design improvement starts with the non-active part, rotor and followed with active part, stator which involve the armature coil slot and field excitation coil (FEC) slot. Since it is one of local optimization method, this method involves more than one cycle of improvement depends on the design structure and slot-pole configuration until achieve optimum performance. However, the initial torque and power output of 12Slot-14Pole is 112.95 Nm and 50.46 kW. The main objective is to improve the structure in order to obtain optimum torque and power output. Besides, it is necessary to reduce flux saturation and optimize the flux flow between the rotor teeth and stator arc width. The target torque and power output performance is expected higher than 210 Nm and 123 kW. With the deterministic optimization method technique, the final torque and power output achived are 221.83 Nm and 189kW.

scholarly journals A New Outer-Rotor Hybrid-Excited Flux-Switching Machine Employing the HTS Homopolar Topology

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2654 ◽  
Author(s):  
Kim ◽  
Jang ◽  
Chung ◽  
Hwang
Keyword(s):  
Permanent Magnets ◽  
Cost Effective ◽  
Performance Outcomes ◽  
Iron Core ◽  
Machine Performance ◽  
Outer Rotor ◽  
Field Excitation ◽  
3D Finite Element Method ◽  
Rotor Structure ◽  
High Output

Currently, studies of flux switching machines are actively underway owing to several advantages of these machines, including their sturdy rotor structure and high output capability. This paper deals with an outer-rotor hybrid-excited flux-switching machine (FSM). The proposed machine embraces a homopolar structure and utilizes permanent magnets (PMs) for field excitation and a high-temperature superconducting (HTS) coil for flux regulation. The stator houses the HTS field coil, PMs, and armature windings. The outer rotor consists solely of an iron core. Thus, the machines are cost effective and can serve as a solution to the design and fabrication complexities of field current supplying and cooling systems. In this paper, the machine performance outcomes are analyzed using the 3D finite element method (FEM), and the validity of the proposed machine is verified.

scholarly journals Optimal design of single-phase 12S-6P FEFSM using segmental rotor and non-overlap windings

2019 ◽  
Vol 14 (2) ◽  
pp. 735
Author(s):  
Mohd Fairoz Omar ◽  
Erwan Sulaiman ◽  
Hassan Ali Soomro ◽  
Faisal Amin ◽  
Laili Iwani Jusoh ◽  
...  
Keyword(s):  
Output Power ◽  
High Speed ◽  
Single Phase ◽  
Flux Linkage ◽  
Copper Loss ◽  
High Torque ◽  
Field Excitation ◽  
Flux Path ◽  
Rotor Structure ◽  
Segmental Rotor

<span>Recently, a three-phase Field Excitation Flux Switching Motor (FEFSM) using salient rotor has been introduced, suitable for high torque, high power as well as high speed diverse performances due to their advantages of easy rotor temperature elimination and controllable field excitation (FE) flux. However, existing FEFSMs are found to have low torque performance as the salient rotor structure has caused longer flux path, and consequently weak flux linkage. Therefore, a new structure of a single-phase FEFSM using segmental rotor and non-overlap windings is proposed. There are two valuable findings found in this topology, first is less copper loss due to the non-overlap windings between armature and FE coils, and secondly the segmental rotor structure has produces shorter flux path to produce high torque, less rotor weight as well as robust rotor at high speed condition. Flux linkage, back-emf, average torque and output power characteristics of the initial and optimized designs have been investigated and compared using 2D Finite Element Analysis (2D-FEA) through JMAG Designer version 15. Based on the 2D-FEA analysis, the average torque has increased by 81.3% to 1.65 Nm, while the output power of 466.5 W, increased of 68.2%. In conclusions, a FEFSM using segmental rotor and non-overlap windings is considered as the best single-phase motor due to their optimal performances and less copper loss.</span>

Preliminary studies of 12S-8P and 12S-14P Hybrid-Excited Flux Switching Machine with FEC in radial direction by using JMAG-designer software

2018 ◽  
Vol 7 (4.30) ◽  
pp. 479
Author(s):  
S. Khalidah Rahimi ◽  
Md. Zarafi Ahmad ◽  
Erwan Sulaiman ◽  
Syed M. Naufal Syed Othman ◽  
Hassan Ali Soomro
Keyword(s):  
Permanent Magnet ◽  
Radial Direction ◽  
High Efficiency ◽  
Synchronous Machines ◽  
Induced Voltage ◽  
Flux Linkage ◽  
Element Analysis ◽  
Excitation Coil ◽  
Field Excitation ◽  
Maximum Field

In this paper, design analysis of Hybrid- Excited Flux Switching Machine (H-EFSM) with 12Slot-8Pole (12S-8P) and 12Slot-14Pole (12S-14P) topologies are presented. H-EFSM  has  been introduced in which  the advantage  of  Permanent  Magnet  (PM)  machines  and  DC  Field Excitation Coil (FEC) synchronous machines is combined. H-EFSM  design proposed less permanent magnet consumption, high to torque/power density and high efficiency. In recent, most of H-EFSM having FEC arranged  in  theta  direction  that affect in flux production which cause less flux generation and machines performances.  Therefore, a design of 12S-8P and 12S-14P H-EFSM with FEC arranged in radial direction is proposed to prevent flux cancellation and produce high flux linkage. Performance analysis of 12S-8P and 12S-14 H-EFSM such as PM flux, induced voltage, cogging torque and flux distribution are investigated by 2-D Finite Element Analysis (2D-FEA). A design with 12S-14P configuration has achieved the higher torque and power with 220.15Nm and  92.45kW, respectively at maximum field and armature current density

Conveying High Torque via an Efficient, High Reduction Ratio, Coaxial, Lightweight A-XYZ Transmission™

2003 ◽  
Author(s):  
Manfred R. Kuehnle
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Acoustic Noise ◽  
Three Dimensional ◽  
Rolling Contact ◽  
Manufacturing Cost ◽  
Future Goals ◽  
Machine Elements ◽  
Prime Movers ◽  
High Torque

In the past, weight and bulk of high torque gear transmissions were determined by the emphasis on lifetime durability, manufacturability, and manufacturing cost obtainable within the stress limits of classical materials when applying the rules of classical kinematics. In contrast, the Advanced XYZ Transmission (A-XYZ™) uses neither conventional materials nor classical kinematics. Instead, for the purpose of achieving load distribution over many rolling contact “teeth”, the A-XYZ transmission conveys the required torque and speed (power) via a three-dimensional path of motion which combines simultaneous vertical rotation and precessional horizontal motion of the machine elements to achieve a dynamically balanced, reversible, coaxial input/output operation. With this intellectually challenging geometric construct plus the use of new materials, the present and future goals of obtaining lightweight gearboxes, mechanical compactness, compatibility with high-speed prime movers, such as micro-turbines and small, high rpm electric motors, have been achieved. Of course, low weight and high efficiency means more mileage per liter of fuel or KWh of energy available. The low acoustic noise (no clicking teeth) represents a high quality trademark, which all competent mechanical engineers will appreciate.

Flux Switching Permanent Magnet Motor using Segmented Outer Rotor Structure for Electric Scooter

2017 ◽  
Vol 6 (2) ◽  
pp. 379 ◽  
Author(s):  
Enwelum Mbadiwe I ◽  
Erwan Sulaiman
Keyword(s):  
Permanent Magnet ◽  
Induction Machine ◽  
Manufacturing Cost ◽  
Permanent Magnet Motor ◽  
Switched Reluctance ◽  
Outer Rotor ◽  
High Torque ◽  
Low Performance ◽  
High Manufacturing Cost ◽  
Rotor Structure

Flux switching motor is a type of electric machine that locates both flux source and armature windings on the stator leaving its rotor a simple piece of iron. This machine was developed by combining the toothed stator structure of induction machine and the toothed rotor structure of switched reluctance machine together. Furthermore, it has three types of flux sources which include permanent magnet. Conventionally, the toothed kind of rotor has dominated machines rotor design and has been known for high manufacturing cost and iron loss, resulting to low performance. This calls for worry and the need to overcome it and also reduce the manufacturing cost while securing high torque. This paper presents flux switching permanent magnet motor employing segmented outer rotor for high torque capability. 2D-FEA using JMAG to investigate the motor characteristics in terms of flux linkage, Induce back-emf, cogging torque, maximum average torque and efficiency. Finally, preliminary results and comparison revealed that motors employing segmented rotor are capable of higher torque than conventional toothed rotor.

Fully solution-processed InSnO/HfGdOx thin-film transistor for light-stimulated artificial synapse

2022 ◽  
Author(s):  
Jun Li ◽  
Shengkai Wen ◽  
Dongliang Jiang ◽  
Linkang Li ◽  
Jianhua Zhang
Keyword(s):  
Thin Film ◽  
High Speed ◽  
High Efficiency ◽  
Memory Function ◽  
Thin Film Transistor ◽  
Manufacturing Cost ◽  
Light Stimulation ◽  
Neuromorphic Computing ◽  
Solution Processed ◽  
Term Memory

Abstract In recent years, the research interest in brain-inspired light-stimulated artificial synaptic electronic devices has greatly increased, due to their great potential in constructing low-power, high-efficiency, and high-speed neuromorphic computing systems. However, in the field of electronic synaptic device simulation, the development of three-terminal synaptic transistors with low manufacturing cost and excellent memory function still faces huge challenges. Here, a fully solution-processed InSnO/HfGdOx thin film transistor (TFT) is fabricated by a simple and convenient solution process to verify the feasibility of light-stimulated artificial synapses. This experiment investigated the electrical and synaptic properties of the device under light stimulation conditions. The device successfully achieved some important synaptic properties, such as paired-pulse facilitation (PPF), excitatory postsynaptic current (EPSC) and the transition from short-term memory (STM) to long-term memory (LTM). In addition, the device also exhibits brain-like memory and learning behaviors under different colors of light stimulation. This work provides an important strategy for the realization of light-stimulated artificial synapses and may have good applications in the field of artificial neuromorphic computing by light signals in the future.

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