JPS63240356A - Magneto generator - Google Patents

Abstract

PURPOSE:To improve power generating performance, by bending or projecting a fixed member, in the title generator whose fixed member is thin sheet type. CONSTITUTION:A magneto generator for vehicles is provided with a tubular (cup type) rotor 1 and permanent magnets 2 are arranged on the inner periphery of the rotor 1. A stator 3, fixed and arranged in the rotor 1, consists of an octagonal magnetic body and stator cores 4a-4h are arranged radially on respective sides of the outer periphery of the magnetic body while a battery charging and power source generating coil 5 as well as an igniting power generating coil 6 are fixed to the cores. In this case, bent parts 9' are formed on both ends of a fixed member 9 whereby an air gap between the fixed member 9 and the permanent magnet 2 is narrowed. According to this method, effective flux, flowing through the stator cores 4a, 4e of the generating coil 6 for ignition through the fixed member 9 may be increased and the power generating performance of the power generating coil 6 for ignition may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic generator, and more particularly to a coil fixing structure for fixing a power generating coil to a stator core of a magnetic generator.

[Conventional technology]

In general, a magnetic generator consists of a cylindrical rotor with permanent magnets arranged on its inner periphery, and a fixed rotor with a plurality of stator cores arranged radially on its outer periphery to face the inner periphery of the rotor. With a child
The stator core is equipped with a power generation coil attached to the stator core, and the rotation of the rotor imparts a change in magnetic flux to the power generation coil of the stator core to generate an electromotive force. The generating coil used in this type of magnetic generator has either a coil structure in which the coil is directly wound around the stator core, or a coil is wound around a bobbin and the coil with the bobbin is attached to the stator core. However, when a particularly high quality generating coil is required, there is a tendency to use a coil with a bobbin. For example, when using a magnetic generator as a vehicle generator, some of the multiple generating coils are used as ignition generating coils to charge the ignition capacitor of the internal combustion engine, and the remaining generating coils are used as ignition generating coils to charge the ignition capacitor of the internal combustion engine. is used as a power source for battery charging and other electrical devices (battery charging and power source).The ignition generating coil uses a coil with a bobbin, and the remaining generating coils are directly wound. I use it for different purposes.

In addition, as a conventional technique related to this type of magnet type generator, there is one disclosed in, for example, Japanese Patent Laid-Open No. 53-96408.

[Problem that the invention seeks to solve]

By the way, when a generating coil with a bobbin is assembled into the stator core of a magnetic generator, the generating coil is usually wound around the bobbin and then the bobbin is attached with a head in order to make the assembly process easier. A fixing member made of a thin plate-shaped magnetic material is interposed between one end of the bobbin and the head of the stator core protruding from one end of the bobbin by press-fitting or the like. The attached generator coil was fixed to the stator core. Although this type of coil fixing structure makes it easy to incorporate a generating coil with a bobbin, it is also difficult to install the generator coil with a bobbin. The air gap between the permanent magnets on the rotor side and the fixed member becomes relatively large, and the effective magnetic flux flowing into the stator core side through the fixed member tends to decrease accordingly. For this reason, for example, when the generating coil of a magnetic generator is used as the generating coil for ignition, a problem arises in that the power generation performance in the low speed rotation range of the engine is reduced, and an improvement has been desired.

The present invention has been made in view of the above-mentioned points, and its purpose is to effectively prevent the bobbin-equipped generating coil from passing through the stator core even when the bobbin-equipped generating coil is fixed to the stator core using a thin plate-like opening-shaped fixing member. The objective is to increase the magnetic flux and improve the power generation performance of a magnetic generator.

[Means for solving problems]

The above purpose is to install a bobbin-attached power generating coil by interposing a thin plate-shaped fixing member (magnetic member) between the head of the stator core and one end of the bobbin inserted into the stator core, as described above. In magnetic generators fixed to the stator core,
A part of the fixing member is bent toward the inner circumferential direction of the rotor, or is made to protrude toward the inner circumferential direction of the rotor, so that the rice-planted magnets on the rotor side and the stator core can be fixed. This is achieved by narrowing the air gap created between the side fixing members.

[Effect]

According to the present invention having the above configuration, even if the fixing member is in the form of a thin plate, by bending or protruding the fixing member, the permanent magnets on the rotor side and the fixing member on the stator core side can be Since the air gap between the two can be made sufficiently small, the effective magnetic flux flowing through the fixed member to the stator core is increased, and the 9! It is possible to improve electric performance. Therefore, even when this power generating coil is used, for example, as a power generating coil for ignition, sufficient electromotive force can be generated even in the low speed rotation range of the engine.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 and 2.

FIG. 1 shows a magnetic type 9! which is an embodiment of the present invention. FIG. 2 is a front view showing a stator of an electric machine. FIG. 2 is a view of the stator of FIG. 1 viewed from two points.

The magnetic generator shown in Fig. 1 is used as a generator for vehicles. In Fig. 1, the cylindrical (bowl-shaped) rotor 1 is partially omitted, and a permanent magnet is attached to the inner circumference of the rotor 1. A magnet 2 is provided. The rotor 1 receives rotational driving force from an internal combustion engine and rotates while being supported by a rotating shaft (not shown).

3 is a stator fixedly arranged within the rotor 1.

The stator 3 is made of an octagonal magnetic material, and stator cores 4a and 4b are provided on each side of the outer periphery of the stator 3.

4c, 4d, 4e, 4f, 4g, and 4h are arranged radially, and 4b is in these stator cores.

4c, 4d, 4f, 4g, and 4h are equipped with a generator coil 5 for battery charging and power supply, while 4a.

An ignition generator coil 6 with a bobbin, which will be described later, is attached to 4e.

The battery charging and power generation coil 5 is connected to each fixed iron core 4b.
~4d and 4f~4h are electrically insulated and directly wound. 7 is an insulating frame for insulating the power generating coil 5 from the stator 3.

On the other hand, the ignition generating coil 6 is connected to a bobbin 8 having insulation properties.
In the wrapped state, it is fixed to the outer periphery of the stator 3 as follows. That is, on the outer periphery of the stator 3 where one ignition generating coil 6 is arranged.

Stator cores 4a and 4e with heads 4 attached in advance (hereinafter referred to as 4
a) is fixed, and a bobbin 8 on which a coil 6 has been wound in advance is inserted into this stator core 4a,
In addition, a U-shaped thin plate-like fixing member 9 as shown in FIG. 6 is fixed to the stator core 4a. The fixing member 9 is made of a magnetic material, and has a shape that covers most of one end surface of the outer bobbin 8. The fixing member 9 faces the permanent magnet 2 on the rotor 1 side, and constitutes part of. Further, the fixing member 9 in this embodiment has both ends thereof bent toward the inner circumferential direction of the rotor 1. 1
0 is a lead wire that supplies the output obtained from each power generation coil to the outside.

According to this embodiment, by forming the bent portions 9' at both ends of the fixed member 9, the fixed member 9 and the permanent magnet 2 are
Since the air gap generated between the ignition generator coil 6 and the ignition generator coil 6 can be narrowed, the effective magnetic flux flowing through the fixed member 9 to the stator cores 4a and 4e of the ignition generator coil 6 can be increased, and the power generation performance of the ignition generator coil 6 can be improved. can be done. . especially,
By controlling the air gap in this way, 1
Sufficient electromotive force for ignition can be generated even in the low speed rotation range of the engine.

3 and 4 show another embodiment of the present invention, and the same reference numerals as in the embodiment of FIG. 1 indicate the same or common elements. The actual kaq in Fig. 3 has both ends of the fixed member 9 bent so as to be bent toward the inner circumferential direction of the rotor, and the embodiment shown in Fig. 4 has a part on the surface of the fixed member 9 rotated. Ribs 11 are provided that protrude toward the inner circumferential direction of the child, and even if the fixing member 9 is formed in this way, the power generation performance of the power generation coil can be improved in the same manner as the embodiment shown in FIG. .

Further, in each of the above embodiments, the ignition generating coil 6 is connected to the bobbin 8.
Although the description has been given using a coil wound around the bobbin 8 and fixed via the fixing member 9 as an example, the generating coil wound around the bobbin 8 and fixed via the fixing member 9 is not limited to the generating coil 6 for ignition, and can be used for various other purposes. It can also be applied to power generation coils.

〔Effect of the invention〕

As described above, according to the present invention, even when a generating coil with a bobbin is fixed to a stator core using a thin U-shaped fixing member, the effective magnetic flux passing through the stator core can be increased to improve the power generation performance of a magnetic generator. can be improved.

[Brief explanation of drawings]

FIG. 1 is a front view showing a stator of a magnetic generator according to an embodiment of the present invention, FIG. 2 is a view of a part of the stator in FIG. 1 viewed from two points, FIG. FIG. 4 is a partially omitted front view of a stator showing another embodiment of the present invention. 1... Rotor, 2... Permanent magnet, 3... Stator,
4a to 4h...Stator core, 4...Head, 5, 6
...To the representative of the power generation plant Masubuji Ogawa Koto No. 10 High school 3rd drawing Hakugozu h

Claims (1)

[Claims] 1. A cylindrical rotor with permanent magnets arranged on its inner periphery, a stator with a plurality of stator cores arranged on its outer periphery so as to face the inner periphery of the rotor, and the stator core and a generating coil to be mounted, at least one of the generating coils being wound around a bobbin, and with the bobbin inserted into the stator core with a head,
A U-shaped fixing member made of a thin plate-like magnetic material is interposed between one end of the bobbin and a head of the stator core protruding from one end of the bobbin to fix the bobbin-attached generating coil to the stator core. In the magnet type generator, the fixed member is disposed to face the permanent magnet on the rotor side, and a part of the fixed member is bent toward the inner circumferential direction of the rotor, or the rotating What is claimed is: 1. A magnet-type generator, characterized in that the magnet-type generator is made to protrude in the direction of the rotor to narrow an air gap formed between the permanent magnet on the rotor side and the fixed member.