| 摘要 |
A motor driving apparatus includes: a threshold providing circuit that provides a plurality of power failure detection thresholds determined according to an installation environment of the motor driving apparatus, a selection circuit that selects a specified power failure detection threshold from the power failure detection thresholds, and a comparison and determination circuit that determines presence or absence of an occurrence of power failure by comparing a detected voltage of an alternating-current power input to a motor driving circuit and the selected power failure detection threshold. Consequently, it is possible to select the power failure detection threshold, which determines a detection reference of power failure in which alternating-current power input is interrupted, according to an installation environment, so that the abnormal end process in the case of an occurrence of power failure in which alternating-current power input is interrupted can be surely performed in any installation environment. |
