Design of a transcutaneous power regulator for artificial hearts

Kam Cheung Tang, Siu Chung Wong, Chi Kong Tse

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Recently, a high efficiency transcutaneous power regulator for artificial heart with PWM-PLL control has been proposed in the literature. In this paper, a new method of sensing the output voltage inside the human body utilizing the same power transcutaneous transformer as signal transmission media is introduced. The feedback signal is modulated in the secondary at a frequency band above the PWM-PLL cut-off frequency and below the converter switching frequency. In this way, the feedback signal can be demodulated from the primary current measured. A SPICE macromodel for the resonant converter is developed to help designing the control loop and the selection of modulation-demodulation frequency banks. Hardware prototype using single-chip DSP together with analog filters was built and control software was implemented as DSP program codes. PLL switching frequency locking function is done by using on-chip analog comparator, it saves extra hardware for PLL control. The voltage loop control algorithm uses a modified PI controller with input voltage feed-forward and output loading estimation.
Original languageEnglish
Title of host publication2nd International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2010
Pages89-95
Number of pages7
DOIs
Publication statusPublished - 17 Sep 2010
Event2nd International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2010 - Hefei, China
Duration: 16 Jun 201018 Jun 2010

Conference

Conference2nd International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2010
CountryChina
CityHefei
Period16/06/1018/06/10

Keywords

  • Digital control
  • Phase-locked loop (PLL)
  • Resonant converter
  • Transcutaneous power control

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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