Actuator driving apparatus

Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control

Reexamination Certificate

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Details

C318S119000, C310S036000

Reexamination Certificate

active

10853672

ABSTRACT:
An actuator driving apparatus comprises the following. A start signal generator generates a start signal having a frequency substantially equal to the resonance frequency of the movable portion of an actuator. A rock detector detects rock of the movable portion. A drive timing signal generator generates a drive timing signal based on the output of the rock detector. A switch is connected to the start signal generator and drive timing signal generator for selectively transmitting their outputs to a section arranged in a subsequent stage. A drive signal generator generates a drive signal based on the output of the switch, and supplies it to the actuator. A superposition preventing section prevents a frequency component of a frequency substantially equal to the resonance frequency from being superposed upon the output of the rock detector. The apparatus performs driving according to the rocking state of the movable portion, by switching the switch.

REFERENCES:
patent: 4879528 (1989-11-01), Gotanda
patent: 4965532 (1990-10-01), Sakurai
patent: 5124796 (1992-06-01), Maki
patent: 5136199 (1992-08-01), Kawai
patent: 5296757 (1994-03-01), Koizumi
patent: 6392741 (2002-05-01), Mori et al.
patent: 0 412 853 (1991-02-01), None
patent: 62-52282 (1987-11-01), None
patent: 2002-277809 (2002-09-01), None
Wenzel, Chris. “Unusual Frequency Dividers.” Wenzel.com. Sep. 11, 1995. Wenzel Associates. Mar. 21, 2006 <http://www.wenzel.com/pdffiles/dividers.pdf>.

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