| 摘要 |
PURPOSE:To prevent the function of a rectification controller from decreasing when an armature current varies by composing a current feedback at part of a controller of an auxiliary interpole current. CONSTITUTION:A current detector 14, an amplifier 18, a drive signal generator 9, and a control power source 6 of a rectification controller 11 are connected via control wirings to form a closed loop, thereby constructing a current feedback control system for operating to correct the difference when a difference arises between an auxiliary electrode current reference signal 8 and an auxiliary interpole current feedback signal 15. If an induced current 13 caused by the mutual induction 12 between an interpole coil 4 and an auxiliary interpole coil 5 tends to flow to the coil 5 at the armature current variation time, a difference occurs between the signal 8 and the signal 15, and the power source 8 is moved in a direction for correcting the deviation. |
