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Free-piston energy converter, which works as an energy conversion device, has been increasingly investigated for a variety of applications, ranging from aerospace, electric vehicles (EVs) to micro combined heat and power (micro-CHP) [1]. The free-piston energy converter integrates a free-piston Stirling engine (FPSE) with an oscillating generator, and it has the advantages of wide power sources, high...
A free-piston energy converter (FPEC) integrated by a combustion engine and a linear electric machine is suitable for series HEV or other applications stand-alone generators. The transverse-flux machine (TFM) is considered advantageous for such application because of its high specific power and force density [1]. The finite element method (FEM) is widely used in the machine analysis, which is time-consuming...
Free-piston energy converter, which has great potential in applications of space and electric vehicles (EVs), has drawn wide interests in recent years. Free-piston energy converter consists of a free-piston Stiring engine and a linear machine. Tubular permanent-magnet (PM) linear machines are widely adopted due to the salient characteristics like high power density and high efficiency. Radially-magnetized,...
A novel optical switch driven by gradient optical force is demonstrated, allowing weak light to switch a strong one. The proposed optically controlled switch achieves an extinction ratio of 28 dB with ∼ns switching speed.
This paper reports a silicon-based micromachined optical power detector with on-chip measurement ability. The optical power is detected by an integrated electron-tunneling displacement transducer, in which optical force is employed as the bridge between optical energy and mechanical energy transition. Compared with the traditional optical power detectors, which are based on photo absorption, the proposed...
In this paper, an optical switch driven by the optical force is demonstrated based on Nanoelectromechanical system (NEMS) technology. The switch consists of a Mach-Zehnder interferometer (MZI) and a ring resonator. One of the MZI arms is suspended to enable optical switching by optical force induced displacement. The optical force is introduced by injecting a control light into the ring resonator...
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