| 摘要 |
In a motor control apparatus, apparatus all switching devices (UP, UN, VP, VN, WP, WN) of all phases of an inverter (3) are kept fixed at OFF in accordance with a value of an all-OFF control pulse signal Poff outputted by a pulse generator (12, 15). The pulse generator (15) generates at least twice a pulse causing an induced voltage detection signal Pdet to change to an H level. A terminal voltage of a motor (5) is inputted in accordance with the value of the induced voltage detection signal Pdet. Data of the sampling round in which amplitude of the induced voltage signal is great and the signal is not in saturation is selected from the data so inputted and a rotor position is estimated. |
