| 摘要 |
PURPOSE:To prevent the impairment of efficiency by selectively storing a driving signal to be successively outputted from the position detection signal - the driving signal table based on the driving signals and selecting the driving signals every variation of the position detection signals. CONSTITUTION:A driving device of DC brushless motor 3 is constituted of a three phase bridge circuit by switching elements 2a-2f, position detection circuit 6 by CR filters 4a-4c and comparators 5a-5c, micro-computer 7 and switching element driving circuit 8. In case of the controlling, in accordance with the driving signal outputted to the switching elements 2a-2f, the driving signal to be outputted successively from a table (position detection signal - driving signal table) stored in a memory of the micro-computer 7 is selected and filed in the memory. Accordingly, every variation of position detection signal the driving signal equivalent to a signal after variation from the said table is selected, this is compared with the next memorized driving signal, and if they are of one accord, they are outputted as they are, and if they are not of none accord, they are not outputted. |
