| 摘要 |
PROBLEM TO BE SOLVED: To realize a brushless DC motor, whose torque characteristic can be set arbitrarily and whose drive control is easy. SOLUTION: In this brushless DC motor, slits are executed inside a core for a rotor, magnets are arranged at the slits, and field poles are formed. A first slit and a second slit are formed inside the core which forms identical field poles at the rotor. The first slit has a curvature which is larger than that of the outer circumference of the stator, and it is curved into an arc shape along the outer circumference of the rotor. The first slit is situated to the outer circumference of the rotor on the side between poles on one side of the field poles, and it is situated to the inner circumference of the rotor on the side of the center line of the field poles. In addition, the second slit is curved arcuately in reverse to the outer circumference of the rotor. The second slit is situated to the inner circumference of the rotor on the side of the center line of the field poles, and it is executed so as to be the outer circumference of the rotor on the side of poles on the other side of the field poles, so that the first slit and the second slit merge between the poles, and the magnets are arranged inside the slits. |
