Update on Development of a Control System for a 5 Kilowatt Free Piston Stirling Engine Convertor

Kirby, Raymond L.; Vitale, N.

doi:10.2514/6.2008-5761

Cited by 2 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pavel Němeček and his fellows in Czech Technical University proposed a double stroke Stirling generating system scheme, adopting new type circuit to achieve energy conversion to realize steady control under generating state [16]. The control method proposed by American scholar Raymond L Kirby combines the characteristic of output stroke and load, which is able to control fuel consumption by controlling the output of current [17]. The Monrovia company Zaher Daboussi proposed a linear motor rotor position detection method of Stirling power system, preventing over stroke by controlling the displacement of free-piston via the back electromotive force (EMF) [18].…”

Section: Introductionmentioning

confidence: 99%

Research on Control Strategy of Free-Piston Stirling Power Generating System

et al. 2017

View full text Add to dashboard Cite

Abstract:As a clean and fuel adaptive alternative power plant, the Stirling power generating system has drawn attention of experts and scholars in the energy field. In practical application, the instability of free-piston Stirling power generating system caused by abrupt load change is an inevitable problem. Thus, methods to improve the output frequency response and stability of the free-piston Stirling power generating system are necessary. The model of free-piston Stirling power generating system is built by isothermal analysis firstly, and the initial control strategy based on given voltage system is put forward. To further improve the performance of power system, a current feedback decoupling control strategy is proposed, and the mathematical model is established. The influence of full decoupled quadrature-direct (d-q) axis currents is analyzed with respect to the output voltage adjusting time and fluctuation amplitude under the variations of piston displacement and output load. The simulation results show that the system performance is significantly improved, but the dynamic regulation lags caused by the decoupled current control still exist. To solve this problem and improve the performance of decoupled-state feedback current control that relies on parameter accuracy, internal model control based on sliding mode (IMC-SM) current decoupling control strategy is proposed, the system model is established, and then the performance of voltage ripple in generating mode is improved. Finally, the test bench is built, and the steady state and transient voltage control performances are tested. The feasibility and priority of the control strategy is verified by experiment and simulation results.

show abstract

Section: Introductionmentioning

confidence: 99%