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Jens Twiefel

affiliation not provided to SSRN

  • affiliation not provided to SSRN

SCHOLARLY PAPERS

4

DOWNLOADS

116

TOTAL CITATIONS

0

Scholarly Papers (4)

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1.

Continuous Eigenfrequency Adaptation of Power Ultrasonic Systems Utilizing Resonant-Switching Full-Bridge Converters

Number of pages: 13 Posted: 30 Dec 2025
Zijian Chen, Yicheng Zhou and Jens Twiefel
affiliation not provided to SSRN, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 43 (1,145,425)

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Piezoelectric ultrasonic systemsEigenfrequency adaptationSiC-based HF switching convertersPower electronics

2.

Feasibility Study on Multifrequency Excitation of the Melt Pool During Ultrasonic-Assisted Laser Beam Welding

Number of pages: 17 Posted: 01 Nov 2022
Christian Nowroth, Jan Grajczak, Andreas Schmelt, Sarah Nothdurft, Jens Twiefel, Jörg Hermsdorf, Stefan Kaierle and Jörg Wallaschek
affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and Leibniz University Hannover
Downloads 40 (1,183,237)

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laser beam welding, ultrasonic excitation, multifrequency excitation

3.

Active Tuning of the Resonance Frequency of Power Ultrasound Transducers Utilizing Synthetic Impedance

Number of pages: 26 Posted: 11 Mar 2026
Willi Ron and Jens Twiefel
affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 19 (1,459,862)

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Power Ultrasound, Synthetic Impedance, Active Resonance Tuning, Load Emulation

4.

Vibration shape tuning for selective vibration node shifting in multimodal ultrasonic systems

Number of pages: 19 Posted: 06 Jun 2026
Christian Nowroth, Takeshi Morita, Jan Grajczak, Sarah Nothdurft, Jens Twiefel, Jörg Hermsdorf, Stefan Kaierle and Jörg Wallaschek
affiliation not provided to SSRN, University of Tokyo, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 14

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laser beam welding, ultrasonic excitation, multimodal excitation, frequency tuning, vibration shape tuning, passive piezo elements