Step motor control for accommodating friction load variation

United States of America Patent

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Apr 29, 2003
Grant Date
Jan 16, 2003
app pub date
Jul 12, 2001
filing date
Jul 12, 2001

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Expired

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Abstract

Gradually increasing and decreasing the friction torque feedforward term in time, prior to and immediately following intended motion, respectively, reduces the effects of variations in Coulomb friction load in an open loop step motor system.

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Patent Owner(s)

Patent Owner	Address
ORIENTAL MOTOR BOSTON TECHNOLOGY GROUP INCORPORATED	SOUTH BRAINTREE PARK 1515 WASHINGTON STREET BRAINTREE MA 02184

International Classification(s)

H02P:CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATO....

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Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Leenhouts, Albert C	Kingman, AZ	6	63

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Step motor control for accommodating friction load variation

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United States of America Patent

09903887

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PATENT NO	6555987
APP PUB NO	20030011339A1
SERIAL NO	09903887
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
April 29, 2003	US,6555987,B2 US6555987B2	GRANTED PATENT AS SECOND PUBLICATION
January 16, 2003	US,20030011339,A1 US20030011339A1	FIRST PUBLISHED PATENT APPLICATION

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09903887

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