Patent ID: 8115350
Filing Date: 2012-02-14
Classification: H02K,Y10T

Abstract:
1. A method for manufacturing an oscillation type electromagnetic power generator including a power generation coil in which two or more solenoid coils are connected in series, and a movable magnet including a plurality of magnets that are arranged such that magnetic poles of magnets facing each other have the same polarity, the movable magnet being located inside of the power generation coil and movable in a direction along a winding axis of the power generation coil, wherein the two or more solenoid coils of the power generation coil are spaced apart with a predetermined coil gap and wound in directions reverse to each other for each adjacent coil, and adjacent magnets of the movable magnet being connected to each other via a spacer having a predetermined thickness in such a manner that the poles with the same polarity are opposed to each other, the method comprising steps of: making a solenoid coil having a predetermined coil diameter, a predetermined number of turns per unit length, and a coil length which is at least three times longer than the coil diameter; measuring rise characteristics of an output voltage when allowing a magnet having a predetermined magnet diameter and a length that is substantially the same as the coil length to pass through the solenoid coil at a predetermined passage speed; obtaining from the measured rise characteristics a rise time elapsing from when the output voltage reaches 10% of a peak amplitude to when the output voltage reaches 90% of the peak amplitude; and determining a length which is substantially two times as long as a length obtained from the rise time and the passage speed as a length of a magnet pitch which is a total dimension of a magnet length of one magnet of the movable magnet and the thickness of the spacer.