| 摘要 |
PURPOSE:To reduce to a large extent vibrations and noises, using no filter, when rotating at a high speed, by providing a pulse delaying means which outputs pseudo output pulses to a logical pulse generating means when a period exceeds a predetermined extent. CONSTITUTION:A logical pulse generating means 2 frequency-demultiplies a pulse train m outputted by a part 1 for sensing inverse electromotive forces, and outputs six-phase pulses of the same frequency as the inverse electromotive forces induced in stator windings 11, 12, 13. A pulse delaying means 3 first counts the period m of the inputted pulse train. Then, the means 3 delays its output pulses by the about half time of the counted period, and outputs them as the delayed pulses to a selective signal generating means 6. Also, when the counted period exceeds a predetermined extent, the means 3 outputs pseudo output pulses to the logical pulse generating means 2. The six-phase pulse signals generated in the logical pulse generating means 2 are inputted to a positional signal generating means 4, and the means 4 converts the six-phase pulse signals into rotating positional signals of a rotor 27. The rotating positional signals are inputted to a means 5 for supplying electric powers to the stator windings. |
