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 speed setting unit, and a speed 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 speed setting unit sets a target value of driving speed 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 driving speed 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 speed control unit controls the driving speed according to the target value of the driving speed set in the speed setting unit.

Dependencies are inferred from the claim text.