| 摘要 |
PURPOSE:To obtain a self-traveling moving magnetic field type permanent magnet motor which can be easily started by providing drive mode switching means for switching a starting operation to a self-driving operation when a rotating speed of a rotary shaft becomes a predetermined speed. CONSTITUTION:When a SW 78 is closed, currents flow to coils A-D through a starting controller 50, a moving magnetic field is generated by a shading coil 10, and a rotor 40 is started. When a rotating speed of a rotary shaft 30 becomes a predetermined speed or more, a weight 72 is displaced outside by a centrifugal force of the shaft 30, a joint 73 is shortened, a slidable cylindrical member 74 is moved to a leftside, and a bridgelike arm 75 is moved to the leftside. Accordingly, a brush retainer 76 is moved leftward to drive a self- driving controller 60. Simultaneously, as the retainer 76 is moved leftward, a response switch 77 is operated to open a power switch 78 and to close a load side switch 79, thereby switching a starting operation to a self-driving operation. Therefore, an energy saving motor which can be easily started and self-driven is obtained. |
