| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque motor capable of increasing generated torque at a prescribed rotational angle position, and a throttle device therewith. SOLUTION: A rotor 41 and a stator core face each other to form a prescribed space in the rotation-axial direction. The rotor 41 consists of a disc rotor core 42 pressed in and fixed to a throttle shaft, and rotor magnets 43, 44 mounted on end surface of the rotor core 42 on the non-throttle valve side with adhesive or the like. The rotor magnets 43, 44 are magnetized in an opposite direction to the rotating shaft, and form four-pole rotor magnetic pole so that magnetism may be different alternately in a rotational direction. Area extended parts 45, 46 whose opposite areas to the stator core are larger than that of other rotational direction position are formed on the closed end in the rotational direction of the rotor magnets 43, 44. When the rotor 41 is rotated in an open valve direction and comes close to the stator core having different magnetization, the generated torque increases near a fully open position.
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