Non-Linear Ankle Foot Orthosis Stiffness in Musculoskeletal Models

Dranetz, Joseph; Carroll, Michael; Matthew, Antonucci; Choi, Hwan Geun

doi:10.52141/gcmas2022_73

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The downside of such a remarkable technological revolution is the vulnerability of semiconductor-based circuitry to power quality issues. Utility mains disturbances such as voltage sags, swells, transients, over-voltages, and noise can cause data losses, equipment damage, and erroneous readings in sensitive electronic devices [1]. Overall, micro-millisecond order transients can be of higher-level magnitudes and are often responsible for the greatest voltage stress, causing high-cost damages [2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Laplace Transform-Based Modelling, Surge Energy Distribution, and Experimental Validation of a Supercapacitor Transient Suppressor

Silva Thotabaddadurage

2023

Technologies

View full text Add to dashboard Cite

The discovery of the transient-surge-withstanding capability of electrochemical dual-layer capacitors (EDLCs) led to the development of a unique, commercially beneficial circuit topology known as a supercapacitor transient suppressor (STS). Despite its low component count, the new design consists of a transient-absorbing magnetic core which takes the form of a coupled inductor placed between the AC-main- and load-side varistors. With an introduction to the structural features of metal oxide varistors (MOVs), gas tubes, thyristors, and EDLCs, this research presents a frequency (S)-domain analysis of an STS circuit to accurately model the surge propagation through its coupled inductor. Transient energy distribution trends among STS components are estimated in this paper, with an emphasis on peak energies absorbed and dissipated by the various inductive, capacitive, and resistive circuit elements. Moreover, this study reveals STS transient-mode test waveforms validated by a standard lightning surge simulator with supporting simulation plots based on LTSpice numerical techniques. Both experimental and simulation results are consistent, with the analytical findings showing 90% of the peak transient propagating through the primary coil, whereas only 10% is shared into the secondary coil of the coupled inductor. In addition, it is proven that the two STS MOVs dissipate over 50% of the transient energy for a standard 6 kV/3 kA combinational surge, while the magnetic core absorbs over 20% of the energy. All test procedures conducted during this research adhere to IEEE C62.41/IEC 61000-4-5 standards.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Compared to the 50/60 Hz power line frequency, the inductive impedance at higher-order frequencies is 400-20,000 times greater. • Given a suitable magnetic core, an inductor can store transient energy as per 1 2 Li 2 , where surge-based magnetic flux is stored inside the core, safeguarding the load side.…”

mentioning

confidence: 99%

Laplace Transform-Based Modelling, Surge Energy Distribution, and Experimental Validation of a Supercapacitor Transient Suppressor

Silva Thotabaddadurage

2023

Technologies

View full text Add to dashboard Cite

show abstract

Non-Linear Ankle Foot Orthosis Stiffness in Musculoskeletal Models

Cited by 1 publication

References 0 publications

Laplace Transform-Based Modelling, Surge Energy Distribution, and Experimental Validation of a Supercapacitor Transient Suppressor

Laplace Transform-Based Modelling, Surge Energy Distribution, and Experimental Validation of a Supercapacitor Transient Suppressor

Contact Info

Product

Resources

About