| 摘要 |
PROBLEM TO BE SOLVED: To provide a stepping motor driving device where caused vibration is reduced in whole rotational speeds without increasing a circuit scale and reduction of caused torque can be suppressed especially when operated in a high speed rotation region. SOLUTION: The stepping motor driving device includes a stepping motor driving circuit controlling current flowing in a coil in accordance with an excitation pattern signal and a current command signal, and a command signal generating circuit generating a current command signal where a harmonic signal is superimposed on a basic-order command signal. The command signal generating circuit can change amplitude of the harmonic signal in accordance with the rotational speed of the stepping motor when superimposing the harmonic signal on the basic-order command signal. COPYRIGHT: (C)2009,JPO&INPIT |
