| 摘要 |
PROBLEM TO BE SOLVED: To obtain the servo circuit of a motor for making the characteristics between the duty ratio of a pulse width modulation signal and a current that flows through a motor approximately linear, without using a large-scale inductance element. SOLUTION: This servo circuit of a motor is provided with a motor 1, a switching means that is connected to a power supply 2 and turns on or off a current that flows to the motor, a rotation detection means for detecting the rotation of the motor, a comparison means for comparing the detection output from the rotation detection means with a target value, and a pulse width modulation conversion means for converting the comparison output of the comparison means to a pulse width modulation signal, thus controlling the switching means according to a pulse width modulation signal from the pulse width modulation conversion means. In the servo circuit, a series circuit for an inductance element 3 and a capacitance element 4 is connected in parallel with the motor 1. |
