| 摘要 |
PURPOSE:To improve the resolution in an ROM of the same capacity and to improve the control efficiency by storing 6 types of signal patterns to an AC control signal one period, and constructing to enable to simultaneously output the signal patterns. CONSTITUTION:An AC control signal one perid is divided into six and data corresponding to the electric angles are stored to be outputted to 1-bit-6-bit on an ROM6. The outputted signals are inputted to a data selector 8. The data is selected upon receiving of a signal of a sexanary ring counter 7 which operates with the 8th bit frequency of a counter 5 as a clock, an AC control signal one period is formed, and delayed at every 120 deg., and other 2-phase AC control signals are formed. |
