Use of Transverse-Flux Machines in a Free-Piston Generator

Arshad, W.M.; Thelin, Peter; Backstrom, T.; Sadarangani, Chandur

doi:10.1109/tia.2004.830791

Cited by 52 publications

(32 citation statements)

References 6 publications

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“…Comparing with AF and RF machines, TF machines allow an increase of the pole number to raise the torque without changing the available size of the machine. TF machines are flexible and attractive to develop in the electromagnetic design however; different topologies of TF machines have been proposed in the literature [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Rotor Position Estimation Strategy Using Artificial Neural Network for a Novel Design Transverse Flux Machine

Türker¹,

Kuyumcu²

2015

Journal of Electrical Engineering and Technology

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-The E-Core Transverse Flux Machine is a different design of transverse flux machines combined with reluctance principle. Determination of the rotor position is important for the movement of the ETFM by switching the phase currents in synchronism with the inductance regions of the stator windings. It is the first time that rotor position estimation based on Artificial Neural Network (ANN) is purposed to eliminate the position sensor for the ETFM. Simulation and experimental tests are demonstrated for the feasibility of the proposed estimation algorithm for the exercise bike application of the ETFM.

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Section: Introductionmentioning

confidence: 99%

Rotor Position Estimation Strategy Using Artificial Neural Network for a Novel Design Transverse Flux Machine

Türker¹,

Kuyumcu²

2015

Journal of Electrical Engineering and Technology

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“…A free-piston generator system has been proposed for auxiliary power generating and hybrid electric vehicle application [1], [2]. This system has high reliability and efficiency and is compact and lightweight.…”

Section: Introductionmentioning

confidence: 99%

“…This system has high reliability and efficiency and is compact and lightweight. In [1] and [2], permanent-magnet (PM) machines have been used where magnets are placed on the mover part of the machine. PM machines have a higher thrust force density (1.2 N/cm ) compared with induction machines (0.2-0.3 N/cm in case of high saturated machine up to 0.4 N/cm ).…”

Section: Introductionmentioning

confidence: 99%

Reciprocating flux-concentrated induction generator for free-piston generator

2006

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This paper presents and examines a self-excited tubular induction generator for a free-piston generator system. The induction generator utilizes flux concentration by eddy currents. The paper shows that leakage flux is thereby reduced in the proposed generator and its performance is greatly improved. A three-dimensional finite-element method is employed to investigate its performance. A comparison of the calculated and measured results for standstill thrust force confirms the validity of the model.

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“…The freepiston generator is a proper choice for the series hybrid electric vehicles, because the fuel consumption is lower, and thereby, the environmental pollution may decrease. Also, the interesting feature of the free-piston generator is the multi-fuel functioning capability [3].As the efficiency and power density of PMLG are higher than the ones of induction-type and switched reluctance generators [4,5,6,7], in recent years, several types of PMLG have been developed for free-piston generator system. The PMLG with transverse flux topology has high magnetic flux density, however, it suffers from high leakage flux [6].…”

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confidence: 99%

Permanent Magnet Tubular Generator with Quasi-Halbach Array for Free-Piston Generator System

Rezaeealam¹

2017

IJPEDS

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In this paper, the performance of a free-piston generator system with tubular single-phase stator winding is investigated for three different configurations of permanent magnet arrays on the mover: radial, rectangular quasi-Halbach and trapezoidal quasi-Halbach arrays. The optimal shape of the rectangular quasi-Halbach magnetization is obtained by employing an optimization technique called Imperialist Competitive Algorithm (ICA), and the results are compared with the previously developed permanent magnet linear generator (PMLG) with magnets of radial magnetization. Then, the resultant design of rectangular quasi-Halbach array, is changed to trapezoidal quasiHalbach array and its performance is compared with other types of magnet arrays. The employed ICA is based on the analytical model of the magnetic flux distribution in air-gap, and is further verified by a nonlinear transient finite element (FE) model. The FE model has been developed to study the performance of the reciprocating PMLG. The accuracy of the proposed FE model is exemplified by comparing the calculated results with the experimental ones regarding the PMLG with radial magnetization. Keyword:PM linear generator Finite element method Imperialist competitive algorithm Copyright © 2017 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Behrooz Rezaeealam, Departement of Electrical Engineering, Lorestan University, Khorramabad, Lorestan, Postal code: 68137-17133, IRAN. Email: rezaee.bh@lu.ac.ir INTRODUCTIONHigh oil prices have put the environmental friendly cars in the spotlight. Now, many car manufacturers are developing some alternative solutions to the conventional car. A free-piston generator is employed for energy conversion in which an internal combustion engine and a linear electric generator are integrated into a single unit [1,2]. Hence, the crankshaft and the connecting rod are omitted. As the moving parts of the engine are minimized, the flexibility and efficiency of the generator are improved. The freepiston generator is a proper choice for the series hybrid electric vehicles, because the fuel consumption is lower, and thereby, the environmental pollution may decrease. Also, the interesting feature of the free-piston generator is the multi-fuel functioning capability [3].As the efficiency and power density of PMLG are higher than the ones of induction-type and switched reluctance generators [4,5,6,7], in recent years, several types of PMLG have been developed for free-piston generator system. The PMLG with transverse flux topology has high magnetic flux density, however, it suffers from high leakage flux [6]. The PMLG with radial magnetization that has been employed for free piston generator system [1,2], has a detent force due to the interaction of the mover permanent magnets with the stator core. Generally, the intense detent force adds to the thrust ripple of the PMLG.The PMLG with quasi-Halbach topology has a self-shielding property and higher flux density than the one with radial topology [8,9]. Furt...

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Use of Transverse-Flux Machines in a Free-Piston Generator

Cited by 52 publications

References 6 publications

Rotor Position Estimation Strategy Using Artificial Neural Network for a Novel Design Transverse Flux Machine

Rotor Position Estimation Strategy Using Artificial Neural Network for a Novel Design Transverse Flux Machine

Reciprocating flux-concentrated induction generator for free-piston generator

Permanent Magnet Tubular Generator with Quasi-Halbach Array for Free-Piston Generator System

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