| 摘要 |
PURPOSE:To suppress an axial current inexpensively and simply by flowing a current for cancelling the axial current to a rotational shaft. CONSTITUTION:When an axial current flows to a rotational shaft 2, the axial current is immediately detected by an axial current detecting sensor 4. A signal outputted from the sensor 4 is outputted to an axial current generating coil 8 through a buffer 5, a phase inverter 6 and an amplifier 7. The signal inputted to the coil 8 is preset to substantially the same current value as the axial current of the shaft 2 and to reverse phase. Accordingly, when the axial current flows to the shaft 2, a current for cancelling the axial current is immediately flowed form the coil 8 to the shaft, thereby resulting in suppressing the axial current. |
