| 摘要 |
PURPOSE:To obtain the dynamic characteristics with superior linearity by a method wherein a phase excitation switching program which makes possible displacement not only to the next phase but also an optional one is set beforehand to control the phase exciting signal by the memory output in which the program has been memorized. CONSTITUTION:A flip flop circuit 1 is set by a start signal, and an octal counter 2 becomes ''enable'' at the H level of an output Q. The octal counter 2 is used to control the exciting signal between 8 steps from the time of start, and gradually counted up by a driving pulse inputted via a latch circuit 3. Then, the counter designates the address of PROM 4 by means of outputs A-C. The PROM 4 generates one after the other phase exciting signals A, B, inverse A and B according to the program memorized beforehand, and reads out successively by the outputs A-C of the octal counter that is counted up by the driving pulse inputted at intervals of set time. It then drives a motor by selecting driving transistors Tr1-Tr4. |
