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Magneto generator

a generator and magnet technology, applied in the direction of magnetic circuit rotating parts, cooling/ventilation arrangement, magnetic circuit shape/form/construction, etc., can solve the problems of reducing the generated current, increasing the resistance value, and insufficient ventilation inside the flywheel

Inactive Publication Date: 2002-03-21
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] As a result, during rotation of the flywheel, air is effectively introduced from outside of the flywheel through the vent holes or air in the flywheel is effectively discharged to outside through the vent holes, whereby it is possible to improve power generation efficiency.
[0011] As a result, during rotation of the flywheel, air is effectively introduced from outside of the flywheel through the vent holes or air in the flywheel is effectively discharged to the outside through the vent holes, whereby it is possible to improve power generation efficiency.
[0013] As a result, any separate process is not necessary to form the fins, and it is possible to manufacture the magneto generator at a reasonable cost.
[0017] As a result, it is possible to introduce the outside air and discharge the heated air in the flywheel to outside more effectively.

Problems solved by technology

In the rotor of the above conventional magneto generator, it is certain that air in the flywheel is stirred, but ventilation inside the flywheel is not sufficient.
As described above, since ventilation is insufficient, it is difficult to change the heated air, and this causes a problem that rise in resistance value due to temperature rise of the winding cannot be sufficiently controlled and the generated current is lowered.

Method used

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Examples

Experimental program
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Effect test

embodiment 2

[0033] FIGS. 3, 4 and 5 show a rotor of a magneto generator according to Embodiment 2 of the invention. FIG. 3 is a sectional view taken along the line III-III of FIG. 4, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3, and FIG. 5 is a sectional view of an essential part taken along the line V-V of FIG. 3. In this Embodiment 2, plural vent holes 16 are formed on the side wall portion of the flywheel 11, and fins 18 are formed of resin so as to surround the circumference and the inside of the vent holes 16. FIG. 3 shows an example of forming one vent hole 16 at every boundary portion of the magnets 12 near the boundary portion of the neighboring magnets 12 on the side wall portion of the flywheel 11. Other than this example, it is also preferable to form a different number of vent holes 16 at different positions on the side wall portion.

[0034] As shown in FIGS. 4 and 5, each of the fins formed so as to surround the circumferences of the vent holes 16 is comprised of a...

embodiment 3

[0036] The foregoing Embodiment 2 shows an example in which the outside air is introduced from the vent holes 16 of the flywheel 11into the inside of the flywheel 11, and the heated air in the flywheel 11 is discharged from the opening side located at the other end side of the circumferential wall portion of the flywheel 11. On the other hand, In this Embodiment 3, as shown in FIG. 6, a hole 18b is formed on the fin 18 in the vent hole 16 so that its center axis makes an acute angle with respect to the rotational direction of the flywheel 11. Accordingly, when rotating the flywheel 11, the outside air is introduced from the opening side located at the other end side of the circumferential wall portion of the flywheel 11, and the heated air is forcibly discharged from the holes 18b formed on the fins 18 to the outside.

embodiment 4

[0037] In the construction in which the outside air is introduced from the vent holes 16 provided with the fins 18 in the same manner as in the foregoing Example 2, as shown in the sectional view of one vent hole 16 taken along the rotational direction of the flywheel 11 in FIG. 7, it is also preferable to form a hole 18c on the fin 18 in the vent hole 16 so that only a backside portion in the rotational direction may have an inclination 18d making an obtuse angle with respect to the rotational direction.

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Abstract

Ventilation efficiency inside a flywheel is improved. Plural vent holes 16 are formed on a side wall portion of a flywheel 11 formed by a circumferential wall portion and the side wall portion on one end side of the circumferential wall portion, and fins 17 protruding toward inside of the flywheel 11 are formed between the neighboring vent holes 16. The fins 17 are formed integrally at the time of filling with a resin 14 with which a space between a guard ring 13 for guarding plural magnets 12 arranged inside the circumferential wall portion of the flywheel 11 and the flywheel 11 is filled, and the magnets 12 are embedded in the resin 14. In generating electric power, the fins 17 rotate synchronously with the flywheel 11, a negative pressure is generated at the vent hole 16 portions, and outside air is introduced into the flywheel 11 and ventilation is performed.

Description

[0001] 1. Technical Field[0002] The present invention relates to a magneto generator for generating an electric power utilizing electromagnetic induction between magnets and armature winding by rotating a flywheel.[0003] 2. Background Art[0004] FIGS. 11 and 12 show a rotor of a conventional flywheel-type magneto generator disclosed in the Japanese Utility Model Publication (unexamined) No. 121380 / 1992. FIG. 11 is a sectional view taken along the line XI-XI of FIG. 12, and FIG. 12 is a sectional view taken along the line XII-XII of FIG. 11. Reference numeral 1 is a bowl-shaped flywheel formed by a circumferential wall portion and a side wall portion on one end side of the circumferential wall portion. Numeral 2 is a magnet, and plural magnets 2 are arranged in the circumferential direction on the circumferential wall portion of the flywheel 1 so as to be engaged with projections 1a arranged on the inside of the circumferential wall portion. Numeral 3 is a cylindrical guard ring forme...

Claims

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Application Information

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IPC IPC(8): H02K9/02H02K1/27H02K9/06H02K21/22
CPCH02K1/2786H02K21/222H02K9/06H02K1/2791
Inventor UEMURA, FUMITOBABA, SHINJIMASUMOTO, YOSHIHIDEUMEZAKI, TOMOKAZU
Owner MITSUBISHI ELECTRIC CORP