Design and analysis of charge-recovery driving circuits for portable peristaltic micropumps with piezoelectric actuators

Abstract Micropumps fabricated by micro-electro-mechanical systems (MEMS) technology are being continuously improved for biomedical applications. Among all kinds of pumps, piezoelectric peristaltic micropumps are most likely to be applied in implementations for the development of high precision drug delivery systems. The micropump can be used in portable devices, where power saving is a critical issue for almost all kinds of portable device. In this work, we consider the design of a power-saving technique for the lead–zirconate–titanate (PZT) micropump system, which allows mobile injection to reduce the power consumption under driving conditions. The modified driving circuits of piezoelectric micropumps are developed with charge recovery using energy storage capacitance. Capacitive charge recovery can be used to recover part of the charge stored within the PZT actuator. The modified driving circuit uses the two-phase charging method whose time duration between two charges is discussed. We discovered that the pump obtains an extra 34%, 13% and 4.2% flow rate at 80 V pp , 120 V pp , and 160 V pp , respectively. The experiential function is investigated to present the effect of time duration and the relationship between the flow rates and the displacement of PZT.

[1]  Po-Wa Lee,et al.  Steady-state analysis of an interleaved boost converter with coupled inductors , 2000, IEEE Trans. Ind. Electron..

[2]  Ling-Sheng Jang,et al.  Effect of actuation sequence on flow rates of peristaltic micropumps with PZT actuators , 2009, Biomedical microdevices.

[3]  Bernhard Vodermayer,et al.  Design and simulation of advanced charge recovery piezoactuator drivers , 2010 .

[4]  D. Campolo,et al.  Efficient charge recovery method for driving piezoelectric actuators with quasi-square waves , 2003, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[5]  Richard B. Fair,et al.  Integrated chemical/biochemical sample collection, pre-concentration, and analysis on a digital microfluidic lab-on-a-chip platform , 2004, SPIE Optics East.

[6]  Ling-Sheng Jang,et al.  Peristaltic micropump system with piezoelectric actuators , 2007 .

[7]  J. G. Smits.  Piezoelectric micropump with three valves working peristaltically , 1990 .

[8]  Luis Martinez-Salamero,et al.  Interleaved converters operation based on CMC , 1999 .

[9]  H. Lintel,et al.  A piezoelectric micropump based on micromachining of silicon , 1988 .

[10]  L. Jang,et al.  Peristaltic piezoelectric micropump system for biomedical applications , 2007, Biomedical microdevices.

[11]  Nam Seo Goo,et al.  Development of a Peristaltic Micropump for Bio-Medical Applications Based on Mini LIPCA , 2008, ArXiv.

[12]  Ming-Kun Chen,et al.  Parameter extraction from BVD electrical model of PZT actuator of micropumps using time-domain measurement technique , 2009 .

[13]  M. Richter,et al.  A bidirectional silicon micropump , 1995 .

[14]  Bernhard Vodermayer,et al.  Performance of piezoelectric micropumps actuated by charge recovery , 2009 .

[15]  H. Andersson,et al.  Microfluidic devices for cellomics: a review , 2003 .

[16]  J. Fluitman,et al.  A thermopneumatic micropump based on micro-engineering techniques , 1990 .

[17]  Mi-Ching Tsai,et al.  A stand-alone peristaltic micropump based on piezoelectric actuation , 2007, Biomedical microdevices.

[18]  Alan G. R. Evans,et al.  Novel actuation of an integrated peristaltic micropump , 2004 .

[19]  X. Zha,et al.  Study on a piezoelectric micropump for the controlled drug delivery system , 2007 .

[20]  Dae-Sik Lee,et al.  Bidirectional pumping properties of a peristaltic piezoelectric micropump with simple design and chemical resistance , 2004 .

[21]  Ming-Kun Chen,et al.  Modified BVD model of PZT actuator using high-voltage square pulse method for micropumps , 2010 .

[22]  Werner Karl Schomburg,et al.  LIGA micropump for gases and liquids , 1994 .

[23]  Alan G. R. Evans,et al.  Investigation for the operation of an integrated peristaltic micropump , 2004 .