Patent ID: 7342377
Filing Date: 2008-03-11
Classification: H02P

Abstract:
1. A stepping-motor control apparatus that controls a stepping-motor, comprising: a clock generation unit configured to generate a clock signal; an excitation phase pattern generation unit configured to generate, on the basis of the clock signal generated in the clock generation unit, an excitation phase pattern for 2-phase excitation and an excitation phase pattern for 1-2-phase excitation, and also to generate an excitation phase pattern used to manage only the number of phases being excited in W1-2-phase excitation and an excitation phase pattern used to manage only the number of phases being excited in 2W1-2-phase excitation; a selection unit configured to select either one of the excitation phase pattern generated in the excitation phase pattern generation unit and the clock signal generated in the clock generation unit in the cases of the 2-phase excitation and the 1-2-phase excitation, and to select the clock signal generated in the clock generation unit in the cases of the W1-2-phase excitation and the 2W1-2-phase excitation; a motor driver configured to execute the 2-phase excitation and the 1-2-phase excitation on the stepping-motor according to the excitation phase pattern or the clock signal selected in the selection unit, and also to execute the W1-2-phase excitation and the 2W1-2-phase excitation on the stepping-motor according to the clock signal selected in the selection unit; and a monitor configured to monitor the excitation phase pattern generated in the excitation phase pattern generation unit, wherein the selection unit selects either one of the excitation phase pattern generated in the excitation phase pattern generation unit and the clock signal generated in the clock generation unit to match with the motor driver in the cases of the 2-phase excitation and the 1-2-phase excitation.