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Electromagnetically-actuated reciprocating pump for high-flow-rate microfluidic applications.

Ming-Tsun Ke1, Jian-Hao Zhong, Chia-Yen Lee

  • 1Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan. mtke@ntut.edu.tw

Sensors (Basel, Switzerland)
|December 4, 2012
PubMed
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This summary is machine-generated.

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This study introduces an electromagnetic pump for microfluidics. The novel design uses an electromagnetic force to drive a diaphragm, achieving a high flow rate of 13.2 mL/min.

Area of Science:

  • Microfluidics
  • Electromagnetics
  • Mechanical Engineering

Background:

  • Microfluidic devices require efficient and precise fluid handling.
  • Traditional micro-pumps often face limitations in flow rate and complexity.
  • Electromagnetic actuation offers a promising alternative for micro-scale fluid control.

Purpose of the Study:

  • To design and demonstrate an electromagnetically-actuated reciprocating pump for high-flow-rate microfluidic applications.
  • To investigate the relationship between electromagnetic force, diaphragm deflection, and pumping performance.
  • To evaluate the pump's flow rate under specific operating conditions.

Main Methods:

  • Fabrication of a microfluidic pump comprising a copper microcoil, a polydimethylsiloxane (PDMS) diaphragm with a magnet, and PMMA channel plates.

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Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

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  • Utilizing an alternating current (AC) through the microcoil to generate an electromagnetic force acting on the diaphragm-mounted magnet.
  • Employing a ball-type check valve for unidirectional fluid flow.
  • Experimental measurement of electromagnetic force, diaphragm deflection, and flow rate at zero head pressure.

    • Main Results:

    • An input current of 0.4 A produced an electromagnetic force of 47 mN and a diaphragm deflection of 108 μm.
    • The pump achieved a flow rate of 13.2 mL/min at an actuating voltage of 3 V and a driving frequency of 15 Hz under zero head pressure.
    • The electromagnetic actuation effectively controlled the diaphragm's bi-directional movement, driving the check valve for pumping.

    Conclusions:

    • The developed electromagnetically-actuated reciprocating pump is suitable for high-flow-rate microfluidic systems.
    • The pump design demonstrates efficient fluid displacement through controlled electromagnetic interaction.
    • This technology holds potential for advancing microfluidic applications requiring significant fluid throughput.