| 摘要 |
PURPOSE:To obtain an exciting circuit for a motor which has less circuit parts and an inexpensive cost by logically processing a current detection signal and a distribution signal and controlling transistors of phases ON and OFF. CONSTITUTION:A distributor 10 forms distributions signals 10a, 10c in the period that windings 2, 4 are excited. Distributions signals 10a, 10c of a distributor 10 and a detection signal 18a of a current detector 18 are inputted to a drive logic circuit 19 which logically calculates. Since the signals 10a, 10c are H, transistors 6, 8 are controlled ON or OFF in response to the H or L of the signals 18a. Thus, the windings 2, 4 are excited, the transistors 7, 9 are controlled ON or OFF similarly een during the next period that the windings 3, 5 are excited, and as a result, the chopper operation of the motor is performed. |
