EP 2334922 A1 20110622 - DEVICE AND METHOD FOR CONTROLLING A RESONANT ULTRASOUND PIEZOELECTRIC INJECTOR
Title (en)
DEVICE AND METHOD FOR CONTROLLING A RESONANT ULTRASOUND PIEZOELECTRIC INJECTOR
Title (de)
VORRICHTUNG UND VERFAHREN ZUR STEUERUNG EINES PIEZOELEKTRISCHEN RESONANZ-ULTRASCHALLINJEKTORS
Title (fr)
DISPOSITIF ET PROCEDE DE COMMANDE D'UN INJECTEUR PIEZO-ELECTRIQUE ULTRASONORE RESONANT
Publication
Application
Priority
- FR 2009051944 W 20091013
- FR 0856939 A 20081014
Abstract (en)
[origin: WO2010043808A1] The invention relates to a device for controlling a resonant ultrasound piezoelectric stage (1), including: a first stage (2) of increasing a DC voltage (VBATT) to an intermediate DC voltage (Vinter), a second modulation stage (3), including an inductor (Lp) connected to the intermediate DC voltage and a first switching transistor (M) for selectively controlling a phase of charging the inductor and a phase of transferring the energy stored in the inductor in response to a first stream of command pulses (Vl), to generate an excitation voltage (VE) of the piezoelectric stage, characterised in that the second stage includes a second switching transistor (M') connected in series between the drain of the first transistor and a terminal of the inductor, suitable for limiting the energy stored in the inductor during the charging phase in response to a second stream of command pulses (V2), so as to reduce the amplitude of the excitation voltage.
IPC 8 full level
F02D 41/20 (2006.01); H10N 30/20 (2023.01); H10N 30/80 (2023.01)
CPC (source: EP US)
F02D 41/2096 (2013.01 - EP US); H02N 2/065 (2013.01 - EP US); F02D 2041/2003 (2013.01 - EP US); F02D 2041/2048 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
FR 2937196 A1 20100416; FR 2937196 B1 20101029; CN 102216595 A 20111012; EP 2334922 A1 20110622; JP 2012505625 A 20120301; US 2011273057 A1 20111110; WO 2010043808 A1 20100422
DOCDB simple family (application)
FR 0856939 A 20081014; CN 200980145319 A 20091013; EP 09756011 A 20091013; FR 2009051944 W 20091013; JP 2011530536 A 20091013; US 200913124335 A 20091013