Method of controlling a motor driven system, apparatus for controlling a motor driven system and a motor driven system controlled in accordance with the disclosed method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10824050
APP PUB NO 20170041552A1
SERIAL NO

14821395

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Actuators are used to move a variety of objects to desired positions. It is generally desirable that they can do this quickly without exhibiting overshoot or ringing. Some actuators are required to respond very quickly and examples of these are voice coil drivers used to move lenses in autofocus cameras provided in everyday devices such as smart phones and tablets. A rapid two step controller scheme had already been disclosed by Analog Devices Inc. While the scheme works well, it can only be used reliably if the resonant frequency of the actuator is known to within 2 or 3%. The inventors have discovered that the resonant frequency of an actuator unexpectedly changes as a function of position. This disclosure provides ways of modifying the control scheme to cope with changes in resonant frequency.

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Patent Owner(s)

  • ANALOG DEVICES GLOBAL UNLIMITED COMPANY

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Calpe, Maravilla Javier Algemesi, ES 34 200
Canada, Jose Carlos Aragon, ES 1 4
English, Eoin E Pallasgreen, IE 17 166
Mahiques, Rafael Valencia, ES 1 4
Martinez, Maria Jose Valencia, ES 7 22

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