| 摘要 |
PURPOSE:To normally or reversely rotate a motor of double rated voltages via a changeover switch of c-contact type. CONSTITUTION:M-coil, N-coil and A-coils are wound on a stator. When a changeover switch (S) is shifted to a contact (a) side, a coil (A) becomes an auxiliary coil connected in series with a condenser (C), and connected in parallel with the M-coil to become a main coil in the series connecting circuit, and a motor is rotated normally. When the switch (S) is shifted to a contact (b), the M-coil becomes the auxiliary coil, the A-coil becomes the main coil, and the motor reversely rotates. The N-coil is always connected in series with the main coil at the high voltage conecting time and to an AC voltage source AC, and always connected in parallel with the main coil at the low voltage connecting time and to the AC source AC. In this manner, the motor can be reversely rotated by one switch which has the contacts (a) and (b). |
