| 摘要 |
PURPOSE:To simplify the current control circuit of a polyphase stepping motor to reduce it in size by providing a switching stabilized power source circuit in the same number as that of stator windings. CONSTITUTION:A switching stabilized power source circuit 7A is connected through switching means 8A, a stator winding 6A and a resistor 10A to a DC power source 1. A diode 9A for feeding back a current is connected in parallel with a series circuit of the winding 6A and the resistor 10A. Error amplifying means 13A compares a voltage across the resistor 10A and the output voltage of pulse generating means 12. Control means 14A controls to switch switching means 8A in response to the output voltage of the means 13A. Thereafter, the switching stabilized power source circuits 7B-7E of the remaining B-, C-, D-and E-phases are similarly composed. |
