| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cause of the nonreciprocal phenomenon to reduce the hysteresis by providing a d-c magnetic field applying means (permanent magnet etc.), for normally applying a d-c magnetic field to a magnetic anisotropic peripheral part of the outside face of a torque transmitting shaft. SOLUTION: A first and a second magnetic anisotropic part 2, 3 composed of many rectangular magnetic belts inclined mutually in opposite directions at specified angles to the axial line are formed on the outside face of a toque transmitting shaft 1. When a torque is located on the torque transmitting shaft 1, compression strains occur in the belts of either magnetic anisotropic parts 2, 3 and tensile strains occur in the belts of the other. At both axial ends of a yoke 6, permanent magnets 12, 13 magnetized at both radial ends are disposed to apply d-c magnetic fields to thereby the magnetic anisotropic parts 2, 3. Thus the normally applied d-c magnetic fields to the magnetic anisotropic parts 2, 3 restrain the magnetic domains in the magnetic anisotropic parts 2, 3 from reducing and moving.
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