Electrical generator or motor structure – Dynamoelectric – Reciprocating
Patent
1996-09-25
1999-11-09
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Reciprocating
381190, H04R 1500, H01L 4106
Patent
active
059820543
ABSTRACT:
To provide a multi-purpose type magnetostrictive device that may be used as an acceleration sensor or a vibration sensor capable of detecting forces acting in more than one direction and which may also be employed as a torque sensor, an actuator, a motor and the like.
Coils 110 to 310 of magnetostrictive bodies 10 to 30 are wound around magnetostrictive members 120 to 320 in such a manner that voltages corresponding to enlongation/contraction of the magnetostrictive members 120 to 320 are generated. The magnetostrictive members 120 to 320 are each constrained at the two ends. The magnetic circuits 130 to 330 apply a bias magnetic field to the magnetostrictive members 120 to 320. The magnetostrictive bodies 10 to 30 are positioned so that they are all aligned in the direction of the Z axis which is taken in the direction of the two ends of each of the magnetostrictive members 120 to 320 and they are also arranged in such a manner that a relationship is maintained in which, on the flat plane formed by the X axis and the Y axis running at a right angle to the direction of the Z axis, a polygonal flat plane S is constituted by connecting the points P1 to P3 at which the magnetostrictive bodies 10 to 30 are positioned, the number of sides of which corresponds to the number of bodies.
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Teruo Mori, et al., "Magnetostrictive Vibration Sensor", pp. 1-4.
Eda Hiroshi
Mori Teruo
Rathore Amer
Uchida Kiyoshi
Yamamoto Yoshio
Dougherty Thomas M.
TDK Corporation
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