| 摘要 |
PURPOSE:To obtain an efficient output of a linear oscillation actuator in comparison with its consumption power, by making the actuator move while giving it a strong force only in one direction and return while giving it a weak force in the inverse direction, in a linear reciprocation. CONSTITUTION:An excitation coil 6 is interposed between both the magnetic fluxes of the space wherein parallel magnetic fluxes having mutually inverse polarities of N-S and S-N are generated at a space. When an N-S magnetic flux is generated in the excitation coil 6 in parallel with both the spatial magnetic fluxes, the excitation coil 6 is drawn to the space wherein the S-N magnetic flux is present while it receives simultaneously a repulsion force and an attraction force from the space. On the other hand, when an S-N magnetic flux of the inverse polarity is generated in the excitation coil 6, it is drawn inversely to the space wherein the N-S flux is present. In this case, the excitation current of the coil 6 is so controlled that it becomes a large current in one AC half cycle and becomes a small current in the following AC half cycle of the inverse direction. That is, in a linear reciprocation, the excitation coil 6 is moved receiving a strong force only in one direction, and is returned receiving a weak force in the inverse direction. Thereby, the efficient output of a linear oscillation actuator in comparison with its consumption power can be obtained. |
