| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to accurately and easily detect power information supplied to a motor by outputting a voltage signal created by a voltage forming circuit as power information of a detected signal of a voltage corresponding to a mean value of a signal switched by a switching circuit. SOLUTION: In a power information detecting device 16 of a motor 5, a switching circuit is turned on and off with a duty ratio related to either one of information among current information flowing through a motor 5 or voltage information applied to the motor 5. A voltage signal corresponding to either voltage information or current information is switched by the switching circuit, so that the mean value of the voltage signal switched becomes a value corresponding to the product of voltage and current, that is, power. Thus, the power information supplied to the motor can be detected easily andaccurately. |
