Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Reexamination Certificate
2007-04-03
2009-08-04
Masih, Karen (Department: 2837)
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
C318S696000, C318S285000
Reexamination Certificate
active
07570007
ABSTRACT:
A method of controlling a stepping motor including a stator having a driving coil wound therearound, and a rotor, the method comprising: performing a driving control of driving the rotor at a predetermined step angle and a stop control of stopping the rotor at a predetermined stop position; and if a predetermined rotation range of the rotor including a range having a maximum position holding torque that is a maximum holding torque of the rotor when the rotor stops with the driving coil thereof being supplied with a current, is referred to as a first rotation range, and a predetermined rotation range of the rotor other than the first rotation range is referred to as a second rotation range, in the stop control, setting the sum of currents supplied to the driving coils to stop the rotor at a target stop position within the second rotation range to be larger than the sum of currents supplied to the driving coils to stop the rotor at a target stop position within the first rotation range.
REFERENCES:
patent: 2005/0140328 (2005-06-01), Nireki
patent: 61-35199 (1986-02-01), None
patent: 8-126394 (1996-05-01), None
patent: 10-323090 (1998-12-01), None
patent: 2001-232882 (2001-08-01), None
patent: 2002-44996 (2002-02-01), None
patent: 2004-56991 (2004-02-01), None
Nobuta Kosaku
Shibasaki Yoshiaki
Edwards Angell Palmer & & Dodge LLP
Masih Karen
Penny, Jr. John J.
Seiko Epson Corporation
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