| 摘要 |
PURPOSE:To simplify a branch circuit for improving the rectifying characteristic and a brnch circuit for improving the speed characteristic of a DC motor and wirings of the exterior of a motor by connecting in series the branch circuits and in parallel the rectifying compensating coil. CONSTITUTION:A branch circuit for improving a high speed range rectifying characteristic with diverter resistor 3 and a contactor 4 and a branch circuit for improving the speed characteristic to maintain the dropping characteristic of the seed in high speed range with stable coil 5 are connected in series, and a rectifying coil 2 is connected in parallel as one branch circuit. The contactor 4 is opened or closed by a comparator 8 in response to the rotating speed of a motor which is detected by a tachometer generator 7 which is coupled directly with an armature 1. Since the branch circuits for improving the rectifying characteristic and speed characteristic are formed as one branch circuit, the branch circuit and the wirings of the exterior of a motor can be simplified. |
