| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque constant variable type motor capable of efficiently performing control suitable for load torque while avoiding complication of a structure.SOLUTION: A torque constant variable type motor (100) includes: a stator (20) fixed to the inside of a housing (10); a rotary shaft (30) rotatably supported by the housing; a rotor (40) coaxially supported by the rotary shaft, rotatable inside the stator, and engaged with the rotary shaft via screw pair parts (31 and 41) to be movable in a shaft direction of the rotary shaft; and a spring (50) for urging the rotor to one side of the shaft direction with respect to the rotary shaft. The rotor is moved in the shaft direction by the urging of the spring according to load torque of the rotary shaft to change the number of flux interlinkage. The rotor (40) has a cup shape including an outer cylinder (44) coaxially arranged on an outer peripheral side of the screw pair parts, and the spring (50) is coaxially arranged around the rotary shaft inside the outer cylinder. |
