Pearne & Gordon LLP
Motor drive control device, motor unit, and motor drive control method
A motor drive control device has a controller and a driver. The controller generates a control signal for controlling driving of a two-phase stepping motor so as to alternately repeat one-phase excitation in which a coil of one phase in coils of two phases of the two-phase stepping motor is excited and two-phase excitation in which the coils of two phases in the coils of the two phases are excited. The driver drives the coils of the two phases, based on the control signal. The controller determines, based on a back electromotive force generated in the coil that was not excited during the one-phase excitation, a period of performing the one-phase excitation, and determines, based on the period of the one-phase excitation performed before the two-phase excitation, a period of performing the two-phase excitation.
MINEBEA MITSUMI INC.
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inventional inventional inventional
Ayaka Kazuo Kei Shigeki Haruka Takayuki
Shimada Takada Yamazaki Miyaji Miyaji Matsui