| 摘要 |
PURPOSE:To enable to select an ROm matched to the operating characteristics of a motor by providing an auxiliary data selector in addition to a main data selector to output a control signal for turning ON or OFF a switching element. CONSTITUTION:A carry signal is inputted to an auxiliary data selector 12B from upper 4 bits of the output of a binary counter 7 which reads out the pattern stored for 30 deg. in an ROM 8 as one cycle. The output of the auxiliary data selector 12B is inputted to a sexanary counter 9, which sequentially outputs a select signal. A main data selector 12A sequentially selects the data of the ROM 8 in accordance with the select signal, and outputs the pattern data of the base signal of a transistor of an inverter main circuit. |
