| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor driving device compatible with positive/negative voltage command signals by a circuit scale smaller than that of the conventional one. <P>SOLUTION: The motor driving device 10 includes a comparator 11 for comparing signals with each other, an error amplifier 12 for amplifying an output signal of the comparator 11, a PWM conversion means 20 for converting a voltage signal into a pulse width signal, a PWM drive part 13 for PWM-driving a motor, a switching element part 14 for performing switching operation, a resistance element 15, an ADC 16 for converting an analog signal into a digital signal, and a polarity switching part 17 for switching the signal polarity. The PWM conversion means 20 has an integration part 21 to output an error integrated value Vint, and a nonlinear conversion part 22 that performs nonlinear conversion so as to exclude a prescribed range from the input error integrated value Vint and outputs a PWM command signal PWMin, in which the prescribed range is excluded, to the PWM drive part 13. <P>COPYRIGHT: (C)2009,JPO&INPIT |
