Hybrid Speed Control of a DC Motor for Magnetic Wireless Manipulation Based on Low Power Consumption: Application to a Magnetic Wireless Blood Pump

Sung Hoon Kim, Kazushi Ishiyama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper presents the magnetic properties and hybrid speed controls for low power consumption of a portable external driver based on a dc motor with a magnet to drive a magnetic wireless blood pump. Within a portable system, having low power consumption is the most important factor. In this paper, we propose a hybrid control method using the pulse width modulation (PWM) and the variable electromagnetic-load method (VEML) to extend the driving time of a rechargeable battery. The VEML method plays the role of a variable mechanical load. To reduce overall power consumption, the PWM and VEML methods were used at low and high rotations per minute, respectively. Hybrid-control of the VEML and PWM methods resulted in power consumption reduction of up to 67.52%. For the wireless operation, the external driver allowed a synchronous radial coupling. Moreover, the VEML structure, which acted as a magnetic power generator, produced the electrical power. The observed ac signal from VEML was used to check rotations per minute without having to use a motor encoder. The proposed external driver consisted of a dc-motor, Nd-Fe-B type of cylindrical permanent magnet, a wound coil, a variable resistor, and a PWM driver. In addition, we investigated the magnetic characteristics of the driver through various simulations and experiments.

Original languageEnglish
Article number6632998
JournalIEEE Transactions on Magnetics
Volume50
Issue number4
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • Hybrid speed control
  • Low power consumption
  • Magnetic wireless pump
  • Portable driver
  • Variable electromagnetic load

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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