Laptop Adaptor Using a Piezoelectric Transformer -Drive Circuit Development-

Abstract

This paper describes incorporation of a piezoelectric transformer into a laptop computer adaptor in order to miniaturize the size and improve the energy utilization. Conventionally, electromagnetic transformer is used in the adaptor for generating the 45W output power. In this study, we show that a multilayer piezoelectric transformer rated 30W output power can satisfy the laptop specifications. The multilayer piezoelectric transformer prototype 27 mm in diameter and 4.7 mm in thickness, operated at 83 kHz under radial mode excitation was fabricated. The drive circuit was operated under near zero voltage switching condition for lowering switching loss. Consequently, the laptop adaptor was made with less than a half of its electromagnetic in volume.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2003
Accession Number
ADA429563

Entities

People

  • B. Koc
  • K. Uchino
  • S. Manuspiya
  • T. Ezaki

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Capacitors
  • Ceramic Materials
  • Circuits
  • Computers
  • Dead Time
  • Electrodes
  • Frequency
  • Full-Wave Rectifiers
  • Impedance
  • Laptop Computers
  • Materials
  • Rectifiers
  • Regulators
  • Resonant Frequency
  • Steady State
  • Transformers
  • Voltage Regulators

Fields of Study

  • Physics

Readers

  • Enterprise Information Systems Architecture and Joint Command Capability Interoperability Support.
  • Integrated Circuit Design and Technology.
  • Logistics and Supply Chain Management.