Motor control circuit, motor control device, actuator and control method for stepping motor

Abstract

The motor control circuit (12) includes an input voltage measuring unit (125), a temperature measuring unit (128), a current setting unit, and a current control unit. The input voltage measuring unit (125) measures an input voltage input to the motor control device (10). The temperature measuring unit (128) measures the temperature. The current setting unit sets a target value of drive current to flow through a coil of a stepping motor (20) based on a measurement result of the input voltage measuring unit (125) and a measurement result of the temperature measuring unit (128) and based on a set value of drive current preset for each of the plural partial areas, which are sectioned in a matrix form with a threshold value related to the input voltage and a threshold value related to the temperature. The current control unit controls the drive current according to the target value of the drive current set in the current setting unit.

Dependencies are inferred from the claim text.