Memorias de investigación
Ponencias en congresos:
Highly efficient linear power amplifier for driving fast slew rate capacitive loads
Año:2017
Áreas de investigación
  • Ingeniería eléctrica, electrónica y automática
Datos
Descripción
The modern Inkjet printer is able to place millions of tiny ink droplets precisely on a paper, fabric or even ceramic to create an image. The piezoelectric technique of inkjet printing employs a crystal that flexes whenever a voltage pulse is applied to the piezo transducer. A representative printing head configuration might employ a single Power Amplifier (PA) to drive up to 1024 nozzles with an equivalent load of approximately 100nF. The simplest voltage form that is used for driving the ink jet printer head is a trapezoidal waveform, which has controlled amplitude and ramps. Because of the needed voltage shape, linear power amplifiers (class B, AB) are normally employed, sacrificing efficiency for the quality of the voltage pulse. In this paper we present a highly efficient solution for the PA that drives an ink jet head with voltage pulses as high as 130V with slew rates of 45V/us and as fast as 110 kHz. The solution is based on an Envelope Tracking approach, i.e. the linear PA is supplied by a varying supply voltage and in that way avoiding high power losses in the linear PA, while preserving good characteristics of the output voltage. Due to the extremely fast slew rate (45V/us) and very high instantaneous power that must be supplied to the load (up to 800W), the varying voltage is implemented using a multilevel converter. By using the proposed solution the power losses can be cut down as much as 50% as it is shown by experimental results.
Internacional
Si
Nombre congreso
IEEE-APEC2017
Tipo de participación
960
Lugar del congreso
Tampa, USA
Revisores
Si
ISBN o ISSN
978-1-5090-5366-7
DOI
10.1109/APEC.2017.7930997
Fecha inicio congreso
26/03/2017
Fecha fin congreso
30/03/2017
Desde la página
2150
Hasta la página
2156
Título de las actas
Proceedings of IEEE-APEC2017
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Electrónica Industrial
  • Centro o Instituto I+D+i: Centro de Electrónica Industrial. CEI
  • Departamento: Automática, Ingeniería Eléctrica y Electrónica e Informática Industrial