JPH10262357A - Small-sized generator driven by attractive force of permanent magnet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small-sized generator which does not become heavy even if its rotational speed is increased, by abolishing the use of iron cores in the generator, and causing permanent magnets to pass through coils of copper wire. SOLUTION: An inner rotor 9 having N poles and S poles arranged at four sites for example circumferentially in the direction of revolution is arranged rotatably, in low cools without iron cores, for example, four copper wire coils. An outer rotor 10 arranged outside the coils rotates coaxially with a pulley 17 to be rotated by an external driving force, and has a set of an N pole and an S pole arranged at each of four sites. By this magnetic force, the inner rotor is attracted induced, and rotated, and currents are generated in the coils.

Description

DETAILED DESCRIPTION OF THE INVENTION

The inner rotor 9 shown in FIG. 3 rotates in the coils 1 to 4 around which the copper wire shown in FIG. 2 is wound. Permanent magnets having N poles and S poles in the rotation direction are arranged in four circular arcs on the inner rotor 9 and continuously pass through the coils 1 to 4 together with the inner rotor.

A sine wave current is generated in the coils 1 to 4 in synchronization with the rotation speed of the inner rotor 9. In this case, the outer rotor 10 shown in FIG. 1 rotates the inner rotor 9 in the coils 1 to 4. The outer rotor 10 rotates coaxially with a pulley 17 which is rotated by an external driving force, and two magnets each having an N pole and an S pole on the same plane at a position shown in FIG. It is located at the place. Since the outer rotor 10 is made of an iron plate, a magnetic field as shown in FIG. 5 is generated between the outer rotor 10 and the inner rotor 9.

This magnetic field can be strengthened by increasing the magnetic force of the outer rotor 10 even if the magnetic force of the inner rotor 9 remains unchanged. That is, the amount of power generation increases as a result.

However, if the magnetic force of the outer rotor 10 is too strong, the bearing 16 attached to the inner rotor 9 is strongly pressed against the rail 15, which causes friction loss and increases rotation. In order to avoid this, two outer rotors having the same magnetic force can be avoided by disposing them at positions facing each other with the inner rotor 9 interposed therebetween.

[Prior art]

In a conventional small generator, a copper wire is wound around a member to be an iron core to form a coil, and N poles and S poles of a magnet are alternately brought close to both ends of the iron core to generate power.

[Problems to be solved by the invention]

[0006] In the conventional small generator, a strong attractive force is generated each time the iron core and the magnetic pole come close to each other, and when switching to the next magnetic pole, the attractive force of the magnet acts as a brake to reduce the number of revolutions of the generator. The higher the speed, the higher the rotational resistance.

[Means for Solving the Problems]

[0007] The iron core in the generator is abolished, and the permanent magnet passes directly through the coil wound with the copper wire.

【Example】

The experimental apparatus shown in FIG. 1 is manufactured, and each of the coils 1 to 4 shown in FIG.
0 m is wound, and the pulley 17 at the lower part of the outer rotor 10 is rotated at about 1500 rpm.

【Example】

[0009] Coils 1 to 4 are connected in series, respectively, and no load is applied to the coils.
A voltage of 10 volts P-P is generated with a 5V bean ball attached.
(Measured by SS-7605)

Note that all permanent magnets used in this machine are general commercial products, and details such as magnetic force are not known, but ferrite magnets are all used.

【The invention's effect】

The conventional small generator becomes gradually heavier as the rotation speed is increased, but the generator of the present invention does not become heavy even when the rotation speed is increased.

[Brief description of the drawings]

FIG. 1 is a front view of experimental power generation.

FIG. 2 is a plan view of experimental power generation. 10 for clarity
Are omitted and the outline is shown by a two-dot chain line.

FIG.

FIG. 1 is a plan view of 9 in FIG.

FIG.

FIG. 1 is a plan view extracted from 10 in FIG.

FIG.

FIG. 1 is a diagram showing a magnetic field of a magnet attached to each of 9 and 10 in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Coil 1 11 Outer rotor magnet 1 2 Coil 2 12 Outer rotor magnet 2 3 Coil 3 13 Outer rotor magnet 3 4 Coil 4 14 Outer rotor magnet 4 5 Inner rotor magnet 1 15 Rail 6 Inner rotor magnet 2 16 φ5 radial ball bearing 7 Inner rotor magnet 3 17 Pulley 8 Inner rotor magnet 4 18 9 Inner rotor 19 10 Outer rotor 20

Claims (4)

[Claims] 1. A method of inducing and rotating a magnet passing through a coil for power generation by another magnet outside the coil. 2. A method of arranging a coil capable of infinitely starting and a method of arranging a permanent magnet passing therethrough. 3. A method of mounting two outer rotors each having a magnet attached thereto so as to prevent friction loss from being applied to the inner rotor. 4. A method of increasing power generation by increasing the magnetic force of the outer rotor even when the magnetic force of the inner rotor remains unchanged.