WO2005098984A3 - Piezoelectric devices and methods and circuits for driving same - Google Patents

Piezoelectric devices and methods and circuits for driving same Download PDF

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Publication number
WO2005098984A3
WO2005098984A3 PCT/US2005/011579 US2005011579W WO2005098984A3 WO 2005098984 A3 WO2005098984 A3 WO 2005098984A3 US 2005011579 W US2005011579 W US 2005011579W WO 2005098984 A3 WO2005098984 A3 WO 2005098984A3
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
piezoelectric actuator
drive
charge packets
circuits
Prior art date
Application number
PCT/US2005/011579
Other languages
French (fr)
Other versions
WO2005098984A2 (en
Inventor
James Vogeley
Marcel F C Schemmann
Garth S Jones
Original Assignee
Par Technologies Llc
James Vogeley
Marcel F C Schemmann
Garth S Jones
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Par Technologies Llc, James Vogeley, Marcel F C Schemmann, Garth S Jones filed Critical Par Technologies Llc
Publication of WO2005098984A2 publication Critical patent/WO2005098984A2/en
Publication of WO2005098984A3 publication Critical patent/WO2005098984A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F04B43/043—Micropumps
    • F04B43/046—Micropumps with piezoelectric drive
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/802—Drive or control circuitry or methods for piezoelectric or electrostrictive devices not otherwise provided for

Abstract

A drive circuit (18) produces a drive signal for a pump (10) having a piezoelectric actuator (14), with the piezoelectric actuator (14) forming a part of the drive circuit (18) and serving to shape a waveform of the drive signal. The drive circuit (18) comprises a pulse generator (100) which generates pulses; a converter circuit (102) which receives the pulses and produces charge packets at a rate which equals a desired drive frequency; and, the piezoelectric actuator (14). The piezoelectric actuator (14) receives the charge packets and, by its capacitive nature, integrates the charge packets to shape the waveform of the drive signal. Preferably, the piezoelectric actuator (14) integrates the charge packets to yield a drive field that approximates a sine wave. In one non-limiting example embodiment, the pulse generator (100) comprises a microcontroller-based pulsed width modulator (PWM) circuit (116) and the converter circuit (102) comprises a flyback circuit.
PCT/US2005/011579 2004-04-02 2005-04-04 Piezoelectric devices and methods and circuits for driving same WO2005098984A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/816,000 US7287965B2 (en) 2004-04-02 2004-04-02 Piezoelectric devices and methods and circuits for driving same
US10/816,000 2004-04-02

Publications (2)

Publication Number Publication Date
WO2005098984A2 WO2005098984A2 (en) 2005-10-20
WO2005098984A3 true WO2005098984A3 (en) 2007-07-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/011579 WO2005098984A2 (en) 2004-04-02 2005-04-04 Piezoelectric devices and methods and circuits for driving same

Country Status (2)

Country Link
US (3) US7287965B2 (en)
WO (1) WO2005098984A2 (en)

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Also Published As

Publication number Publication date
US20080018200A1 (en) 2008-01-24
US7287965B2 (en) 2007-10-30
US20110256004A1 (en) 2011-10-20
WO2005098984A2 (en) 2005-10-20
US20050225202A1 (en) 2005-10-13
US7969064B2 (en) 2011-06-28

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