| 摘要 |
PROBLEM TO BE SOLVED: To provide the structure of a rotor that can secure sufficient tightening margin, even when utilizing a shrink ring made of FRP, and its manufacturing method. SOLUTION: A rotary electric machine is provided with a rotary shaft 10 in which the middle part in a shaft direction is formed into a conical rest shape with a specified taper and both end parts are formed cylindrically, a permanent magnet 20 that fits to the outer periphery of the middle part of the rotary shaft 10 and is formed into a conical rest cylindrical shape where the outer periphery part has a specified taper, a shrink ring 30 made of FRP that is forced into the outer periphery of a permanent magnet with a specified clamping margin, a metallic protection sleeve 31 that is provided on the inner-periphery surface of the shrink ring 30 and where the inner periphery has a taper corresponding to the outer periphery of the permanent magnet 20, and a pair of balance plates 40 and 41 that are fixed to the rotary shaft 10 so that the permanent magnet 20 and a shrink ring 30 are pressed from both sides in the shaft direction.
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