Energy saving circuit arrangement for a piezoelectric positioning element

US4404502A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Valentin Magori · Gernsheim, DE
• Peter Kleinschmidt · Munich, DE

Key dates

• Filing date: Dec 8, 1981
• Grant date: Sep 13, 1983
• Expiry date: Dec 8, 2001

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B06B2201/55
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A circuit arrangement for a piezoelectric positioning element is formed of a series connection of a capacitive element, an inductance, and first switch to be controlled, said series circuit being connected across at least one piezoelectric body of the positioning element. The capacitive element, which may be another piezoelectric body of the same positioning element but which is operated in reverse phase, has at least approximately the same capacitance value as a capacitance of the first piezo-electrical body. The inductance is dimensioned sufficiently large in order to magnetically intermediately store substantially an entire energy increment to be transferred between the positioning element and the capacitive element. The first switch is connected to permit termination of a charge transfer. A series circuit is formed of an electrical energy source for charging and recharging and a second switch, said series circuit being connected parallel to the positioning element or the capacitive element. A controllable short-circuit switch is connected parallel to the capacitive element or parallel to the positioning element. In this way, the activation energy of the piezoelectric body is re…