relation: https://khub.utp.edu.my/scholars/389/
title: Rectangular current commutation and open-loop control for starting of a free-piston linear engine-generator
creator: Zulkifli, S.A.
creator: Karsit, M.N.
creator: Aziz, A.R.A.
description: Starting a free-piston linear engine-generator consists of reciprocating a freely moving piston-magnettranslator assembly between two oppositely placed engine cylinders to initiate combustion. To provide for the reciprocating force, the machine is operated as a brushless linear motor. A starting strategy is proposed which utilizes the air-spring quality of the engine cylinders prior to combustion: by energizing the coils with fixed DC voltage and by open-loop, rectangular commutation of injected current, sufficiently high motor force is produced to reciprocate the piston-magnet assembly in small amplitudes initially. Due to repeated compression-expansion of the engine cylinders and constant application of motoring force in the direction of natural bouncing motion, the translator's amplitude and compression pressure is expected to grow - due to mechanical resonance - to finally reach the required parameters for combustion. This work discusses the electrical aspects of the starting strategy, considers control possibilities, builds a model of the electrical subsystem and presents simulation and validation tests of the integrated model for starting investigation. © 2008 IEEE.
date: 2008
type: Conference or Workshop Item
type: PeerReviewed
identifier:   Zulkifli, S.A. and Karsit, M.N. and Aziz, A.R.A.  (2008) Rectangular current commutation and open-loop control for starting of a free-piston linear engine-generator.  In: UNSPECIFIED.     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-63049128041&doi=10.1109%2fPECON.2008.4762637&partnerID=40&md5=bbb817a4244def6578513997988006ff
relation: 10.1109/PECON.2008.4762637
identifier: 10.1109/PECON.2008.4762637