Abstract
AbstractThe energy source for driving the power reed switch is considered to be due to the magnetization energy provided to the power reed switch magnet piece by the magnetic field formed by a permanent magnet or an electromagnetic coil. Of the permanent magnets, i.e., the driving system by a ferrite magnet or a rare earth magnet in which the recoil permeability is close to unity, the magnetic field distribution of the power reed switch magnet piece can be derived analytically. Further, the magnetization energy can be derived easily by an approximate calculation.On the other hand, if the reference magnetization energy for driving the power reed switch is obtained a priori which is compared with the magnetization energy by an arbitrarily shaped permanent magnet, the driving force of the power reed switch is found to be obtained accurately. As a result, it becomes possible to design a magnetic proximity switch taking into consideration the magnetic stability in an environment with a permanent magnet. Thus, stabilization of the product quality and improvement of the reliability are expedited significantly. A speedy introduction of the products is enhanced.
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