Patent ID: 8080968
Filing Date: 2011-12-20
Classification: G01R

Abstract:
1. A stepper motor control device, comprising: a sensor that detects physical quantities; and a control device that controls an operation of a stepper motor based on data corresponding to the physical quantities sent from the sensor, wherein the control device implements wherein the control device is a drive control device of the stepper motor that drives the stepper motor by supplying to the stepper motor a second divisional target rotational angle which is a value calculated by the divisional target rotational angle computation process as a rotational angle per one control period; wherein the divisional target rotational angle computation process divides the target rotational angle change by the first divisional target rotational angle within the range not exceeding the rotational limit for loss of synchronism of the stepper motor to calculate a “quotient” and a “remainder” thereof; and wherein the drive control device of the stepper motor sets the “quotient” to “quotient +1” in the case the “remainder” is not 0 and obtains a second divisional target rotational angle differing from the first divisional target rotational angle to drive the stepper motor based on the second divisional target rotational angle.