US 12,282,279 B2
Motor control apparatus and image forming apparatus with limiting coil current flowing through motor coil
Masatoshi Itoh, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by Canon Kabushiki Kaisha, Tokyo (JP)
Filed on Oct. 31, 2023, as Appl. No. 18/498,141.
Application 18/498,141 is a continuation of application No. 17/104,263, filed on Nov. 25, 2020, granted, now 11,846,904.
Claims priority of application No. 2019-215598 (JP), filed on Nov. 28, 2019.
Prior Publication US 2024/0061365 A1, Feb. 22, 2024
Int. Cl. H02P 1/24 (2006.01); G03G 15/00 (2006.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01)
CPC G03G 15/5004 (2013.01) [G03G 15/5008 (2013.01); G03G 15/80 (2013.01); H02P 21/18 (2016.02); H02P 21/22 (2016.02)] 8 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming unit configured to form an image on a sheet;
a brushless motor configured to drive a rotating member of the image forming unit;
a setting unit configured to set a limit value for limiting a current flowing through a coil of the brushless motor;
a determination unit configured to determine a current value flowing through the coil of the brushless motor for a predetermined period;
a comparison unit configured to compare the current value for the predetermined period with a threshold value smaller than the limit value; and
an update unit configured to update the limit value by reducing the limit value by a predetermined value when the current value has exceeded the threshold value.