TY  - CONF
N2  - Starting a free-piston linear engine-generator (LG) requires favorable compression pressure and piston speed for combustion to occur. To produce the required reciprocating motion, the LG is operated as a brushless linear motor. However, the peak force required to achieve the full stroke is beyond the maximum motor force that can be produced, limited by the coils' current capacity and LG's motor constant. A starting method is proposed, utilizing mechanical resonance and the air-spring character of engine cylinders prior to combustion. Energizing the coils with fixed DC bus voltage and open-loop, rectangular current commutation, the LG is reciprocated in small amplitudes initially. Due to repeated compression-expansion of the engine cylinders and constant application of motoring force in the direction of natural resonating motion, the translator's amplitude and speed is expected to grow and reach the final required values for combustion. To investigate viability of the proposed strategy, an integrated model of LG - consisting of mechanical and electrical subsystems - is developed and real-time simulation is performed on Matlab Simulink. The individual models are validated against field experimentation before final simulation and experimentation are implemented. This work discusses simulation and experimental results of the proposed starting strategy. © 2009 IEEE.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-70349473262&doi=10.1109%2fIEMDC.2009.5075241&partnerID=40&md5=2bf7cf2c41a5bd487bd006332c72a337
CY  - Miami, FL
AV  - none
ID  - scholars697
TI  - Investigation of linear generator starting modes by mechanical resonance and rectangular current commutation
SN  - 9781424442522
Y1  - 2009///
EP  - 433
A1  - Zulkifli, S.A.
A1  - Karsiti, M.N.
A1  - A-Aziz, A.-R.
KW  - Compression pressures; Compression-expansion; Current capacity; Current commutation; DC-bus voltages; Electrical subsystems; Engine-generator; Field experimentation; Free piston; Individual models; Integrated models; Linear generators; Matlab-Simulink; Mechanical resonance; Motor constant; Open loops; Peak force; Real time simulations; Reciprocating motion; Small amplitude; Starting methods; Starting mode
KW  -  Combustion; Cylinders (shapes); Electric commutation; Electric drives; Electric machinery; Engine pistons; MATLAB; Motors; Resonance; Simulators; Smoke
KW  -  Engine cylinders
N1  - cited By 28; Conference of 2009 IEEE International Electric Machines and Drives Conference, IEMDC '09 ; Conference Date: 3 May 2009 Through 6 May 2009; Conference Code:77303
SP  - 425
ER  -