Power circuit for piezo-electric motor
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United States of America Patent
Stats
-
Jul 9, 2002
Grant Date -
Nov 8, 2001
app pub date -
Dec 6, 2000
filing date -
Dec 9, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Power circuit for traveling or standing wave piezo-electric motors comprising a series resonant circuit, a switching element (T1) in parallel with the capacitor C of the resonant circuit and a switching element control (O) ensuring the cyclic closure thereof at a frequency close to the resonant frequency of the resonant circuit. The power circuit includes a transformer (Tr) whose primary constitutes the inductance of the resonant circuit and whose secondary is linked to the piezo-electric exciter, this transformer exhibiting a small magnetic inductance at the primary. An advantage of this power supply is in particular the almost-zero heating of the switching element and low current consumption.
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