Advanced Controller for the Free-Piston Stirling Convertor

Gerber, Scott S.; Jamison, Mike; Roth, Mary Ellen; Regan, Timothy F.

doi:10.2514/6.2004-5519

Cited by 11 publications

(6 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Scott S Gerber proposed a hierarchical control scheme for the Stirling power generation system, which is divided into three layers: energy management layer, air fuel ratio control layer, and linear motor trajectory control layer [15]. 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].…”

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%

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

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Compared with the traditional Internal-Combustion Rotary Generators, the Stirling Linear Generators without the mechanical transmission device make the structure more compact and more reliable. And these also promote the efficiency [1][2][3][4]. And Stirling Linear Generators have the advantages of lower vibrancy, lower noise, lower emission, simpler structure, higher efficiency and larger range of fuel and therefore more and more people pay attention to them.…”

Section: Introductionmentioning

confidence: 99%

The Highest Efficiency Control of the Stirling Linear Generator

Zhang

Kou

Zhou

et al. 2013

AMM

View full text Add to dashboard Cite

A high efficient current control strategy of the Stirling linear generators was investigated in this paper. The structure of the linear generator was introduced and mathematical model was built. The efficiency of the system is compared in different current modes. The highest efficiency control strategy is calculated in the conditions of without magnetic saturation, iron-loss, mechanical loss and treating inductance as a constant. At the same time, the maximum ratio of the electromagnetic power to current control is realized. Finally, this algorithm was validated in the simulation and experiment.

show abstract

“…In reality, the internal EMF voltage (V alt ) is not available on most Stirling engine designs; however, it can be derived from the Stirling piston position signal (ref. 4). The switching frequency of the AFBR MOSFETs depends on how fast the current changes from the upper limit to the lower limit and vice versa, which, in turn depends on the L alt inductance value.…”

Section: DCmentioning

confidence: 99%