Patent ID: 6617754
Filing Date: 2003-09-09
Classification: H02N

Abstract:
A wired circuit arrangement for the dynamic control of piezotranslators (2) with energy recovery by means of a single inductive intermediate store (1) which is connected in series with the piezotranslators (2) as well as by clocked switches, wherein for achieving a predetermined linear voltage characteristic at the piezotranslator (2), a secondary circuit is designed as a half-bridge consisting of the clocked switches (3, 4) having an output, respectively, wherein the inductive intermediate store (1) is connected to the output of the clocked switches, respectively, and connected in series with the piezotranslator (2), with the clocked switches (3, 4) connected to an upper supply voltage or a lower supply voltage and being externally controlled and operated at a high cycle or switching frequency in such a manner that the intermediate store is alternately connected with the upper or lower supply voltage ((UB/2) at the most, with the series connection of piezotranslator (2) and inductive intermediate store (1) carrying a superimposed bridge direct current; wherein the clocked switches (3, 4) are formed as MOS transistors (9), with an external diode (10) being connected in series with the clearance between contacts, and this series connection being bridged by a commutating diode (11) which is oppositely poled to the diode (10).