---
_id: '8926'
abstract:
- lang: eng
  text: Piezoelectric transformers are well known since the publication of some patent
    applications at the end of the 1950s. But until today their only business use
    lies in the field of backlighting systems for LCDs. Due to key features as light-weight,
    flatness, high step-up at low volume and high efficiency piezoelectric transformers
    should be usable in a much broader range of applications. This contribution returns
    to mind their operating principle, shows how to model and to develop such devices
    as well as give some aspects for development trends that will lead to further
    applications.
author:
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Littmann, Walter
  last_name: Littmann
- first_name: Jörg
  full_name: Wallaschek, Jörg
  last_name: Wallaschek
citation:
  ama: 'Hemsel T, Littmann W, Wallaschek J. Piezoelectric transformers - state of
    the art and development trends. In: <i>Ultrasonics Symposium, 2002. Proceedings.
    2002 IEEE</i>. Vol 1. ; 2002:645-648. doi:<a href="https://doi.org/10.1109/ULTSYM.2002.1193485">10.1109/ULTSYM.2002.1193485</a>'
  apa: Hemsel, T., Littmann, W., &#38; Wallaschek, J. (2002). Piezoelectric transformers
    - state of the art and development trends. In <i>Ultrasonics Symposium, 2002.
    Proceedings. 2002 IEEE</i> (Vol. 1, pp. 645–648). <a href="https://doi.org/10.1109/ULTSYM.2002.1193485">https://doi.org/10.1109/ULTSYM.2002.1193485</a>
  bibtex: '@inproceedings{Hemsel_Littmann_Wallaschek_2002, title={Piezoelectric transformers
    - state of the art and development trends}, volume={1}, DOI={<a href="https://doi.org/10.1109/ULTSYM.2002.1193485">10.1109/ULTSYM.2002.1193485</a>},
    number={vol.1}, booktitle={Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE},
    author={Hemsel, Tobias and Littmann, Walter and Wallaschek, Jörg}, year={2002},
    pages={645–648} }'
  chicago: Hemsel, Tobias, Walter Littmann, and Jörg Wallaschek. “Piezoelectric Transformers
    - State of the Art and Development Trends.” In <i>Ultrasonics Symposium, 2002.
    Proceedings. 2002 IEEE</i>, 1:645–48, 2002. <a href="https://doi.org/10.1109/ULTSYM.2002.1193485">https://doi.org/10.1109/ULTSYM.2002.1193485</a>.
  ieee: T. Hemsel, W. Littmann, and J. Wallaschek, “Piezoelectric transformers - state
    of the art and development trends,” in <i>Ultrasonics Symposium, 2002. Proceedings.
    2002 IEEE</i>, 2002, vol. 1, no. vol.1, pp. 645–648.
  mla: Hemsel, Tobias, et al. “Piezoelectric Transformers - State of the Art and Development
    Trends.” <i>Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE</i>, vol. 1, no.
    vol.1, 2002, pp. 645–48, doi:<a href="https://doi.org/10.1109/ULTSYM.2002.1193485">10.1109/ULTSYM.2002.1193485</a>.
  short: 'T. Hemsel, W. Littmann, J. Wallaschek, in: Ultrasonics Symposium, 2002.
    Proceedings. 2002 IEEE, 2002, pp. 645–648.'
date_created: 2019-04-15T10:18:15Z
date_updated: 2022-01-06T07:04:05Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2002.1193485
intvolume: '         1'
issue: vol.1
keyword:
- piezoelectric devices
- reviews
- transformers
- backlighting systems
- flatness
- high efficiency piezoelectric transformers
- high step-up
- light-weight
- low volume
- operating principle
- piezoelectric transformers
- Circuits
- Costs
- Electromagnetic devices
- Electromagnetic fields
- Mechanical energy
- Piezoelectric materials
- Power electronics
- Switching frequency
- Transformers
- Vibrations
language:
- iso: eng
page: 645-648
publication: Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
publication_identifier:
  issn:
  - 1051-0117
status: public
title: Piezoelectric transformers - state of the art and development trends
type: conference
user_id: '55222'
volume: 1
year: '2002'
...
---
_id: '8915'
abstract:
- lang: eng
  text: Ultrasonic linear motors have now been investigated for several years. Their
    key features are high thrust forces related to their volume and good position-accuracy.
    This contribution consists of two main parts. In the first part we describe the
    state-of-the-art of linear piezoelectric motors. Characteristics like no-load
    velocity, maximum thrust force and other technical properties of commercially
    available devices will be reported as well as those of prototypes. In the second
    part we report an ongoing research and development project aiming at a linear
    piezoelectric motor, which is capable of surpassing some of the shortcomings of
    other piezoelectric motors
author:
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Jörg
  full_name: Wallaschek, Jörg
  last_name: Wallaschek
citation:
  ama: 'Hemsel T, Wallaschek J. State of the art and development trends of ultrasonic
    linear motors. In: <i>Ultrasonics Symposium, 2000 IEEE</i>. Vol 1. ; 2000:663-666
    vol.1. doi:<a href="https://doi.org/10.1109/ULTSYM.2000.922635">10.1109/ULTSYM.2000.922635</a>'
  apa: Hemsel, T., &#38; Wallaschek, J. (2000). State of the art and development trends
    of ultrasonic linear motors. In <i>Ultrasonics Symposium, 2000 IEEE</i> (Vol.
    1, pp. 663–666 vol.1). <a href="https://doi.org/10.1109/ULTSYM.2000.922635">https://doi.org/10.1109/ULTSYM.2000.922635</a>
  bibtex: '@inproceedings{Hemsel_Wallaschek_2000, title={State of the art and development
    trends of ultrasonic linear motors}, volume={1}, DOI={<a href="https://doi.org/10.1109/ULTSYM.2000.922635">10.1109/ULTSYM.2000.922635</a>},
    booktitle={Ultrasonics Symposium, 2000 IEEE}, author={Hemsel, Tobias and Wallaschek,
    Jörg}, year={2000}, pages={663–666 vol.1} }'
  chicago: Hemsel, Tobias, and Jörg Wallaschek. “State of the Art and Development
    Trends of Ultrasonic Linear Motors.” In <i>Ultrasonics Symposium, 2000 IEEE</i>,
    1:663–66 vol.1, 2000. <a href="https://doi.org/10.1109/ULTSYM.2000.922635">https://doi.org/10.1109/ULTSYM.2000.922635</a>.
  ieee: T. Hemsel and J. Wallaschek, “State of the art and development trends of ultrasonic
    linear motors,” in <i>Ultrasonics Symposium, 2000 IEEE</i>, 2000, vol. 1, pp.
    663–666 vol.1.
  mla: Hemsel, Tobias, and Jörg Wallaschek. “State of the Art and Development Trends
    of Ultrasonic Linear Motors.” <i>Ultrasonics Symposium, 2000 IEEE</i>, vol. 1,
    2000, pp. 663–66 vol.1, doi:<a href="https://doi.org/10.1109/ULTSYM.2000.922635">10.1109/ULTSYM.2000.922635</a>.
  short: 'T. Hemsel, J. Wallaschek, in: Ultrasonics Symposium, 2000 IEEE, 2000, pp.
    663–666 vol.1.'
date_created: 2019-04-15T09:52:09Z
date_updated: 2022-01-06T07:04:05Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2000.922635
intvolume: '         1'
keyword:
- linear motors
- ultrasonic motors
- linear piezoelectric motor
- maximum thrust force
- no-load velocity
- ultrasonic linear motor
- Electromagnetic devices
- Electromagnetic fields
- Frequency
- Friction
- Gears
- Materials science and technology
- Piezoelectric materials
- Research and development
- Vibrations
- Wheels
language:
- iso: eng
page: 663-666 vol.1
publication: Ultrasonics Symposium, 2000 IEEE
publication_identifier:
  issn:
  - 1051-0117
quality_controlled: '1'
status: public
title: State of the art and development trends of ultrasonic linear motors
type: conference
user_id: '55222'
volume: 1
year: '2000'
...