PERMANENT MAGNET FIXING STRUCTURE IN ROTOR FOR ROTATING ELECTRIC MACHINE

PROBLEM TO BE SOLVED: To provide a structure for fixing permanent magnets simply and securely to a rotor core of a rotating-electric machine. SOLUTION: A rotor 11 of a motor is structured by fitting a permanent magnet 14 into a permanent magnet supporting hole 13c formed in the rotor core 13. A leaf spring 15 is arranged between the inside circumferential surface 'a' of the permanent magnet supporting hole 13c and the permanent magnet 14. As a result, the permanent magnet 14 can be strongly fixed into the rotor core 13 by a simple structure and the smaller number of steps in a process. Also, because the leaf spring 15 arranged on the inside circumferential surface 'a' of the permanent magnet supporting hole 13c energizes the permanent magnet 14 outside in the radial direction of the rotor core 13, and presses it to the outside circumferential surface 'b' of the permanent magnet supporting hole 13c, the rattling of the permanent magnet 14 can be prevented even if a centrifugal force acts on the permanent magnet 14. Furthermore, the presence of the leaf spring 15 mounting space inside the radial direction, which becomes the back yoke side of the rotor core 13, minimizes an effect that the space exerts on the magnetic flux generated by the permanent magnets 14 so that the performance of the motor can be improved. COPYRIGHT: (C)2005,JPO&NCIPI