| 摘要 |
PURPOSE:To simplify shunt circuits by concentrating a plurality of shunt circuits for improving the rectifying characteristic and speed characteristic of a DC motor with a field control to a sole shunt circuit. CONSTITUTION:A main circuit of an armature 1 and a rectifying compensating winding 2 is connected between motor terminals A and H, and a shunt circuit of a stable winding 6, a resistor 7 and a contactor 5 is connected between the intermediate terminal G and the terminal H. The contactor 5 is closed in a field control range, i.e., at the speed n3 or higher out of the intermediate range between the bottom speed n1 and the maximum speed n2. In this manner, the inductance of the stable winding can be effectively activated, and a DC reactor for a diverter circuit can be eliminated. |
