JPH08322219A - Flywheel permanent-magnet generator for internal combustion engine - Google Patents

Abstract

PURPOSE: To increase the output of an armature for general load by fitting the armature with the first salient pole section of the armature a positioned adjacent to one end side of an I-shaped iron core and the fifth salient pole section of a multipole iron core positioned to the other end side of the I-shaped iron core. CONSTITUTION: The yoke section Y of an armature 5 for general load is tied with a fixed base while the first salient pole section P1 of the armature 4 is positioned adjacent to the magnetic pole section 401a of an I-shaped iron core 401 on one end side of the core 401 and the fifth salient pole section P5 of a multipole iron core 501 is positioned to the other end side of the core 401. A space for forming a long hole 302a is secured between first and second power generating coils WP1 and WP2 by deviating the second and fourth salient pole sections P2 and P4 of the core 501 and another space for forming another long hole 302b is secured between a fifth power generating coil W5 and the core 401 by setting the angular interval between the salient pole section P5 and core 401 larger than that between the salient pole section P1 and core 401. Therefore, the output of the armature 5 can be increased while the winding spaces of the coils are secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel magnet generator mounted on an internal combustion engine.

[0002]

2. Description of the Related Art A flywheel magnet generator is used as a generator attached to an internal combustion engine that drives a vehicle or the like.

FIGS. 3 and 4 show an example of a conventional flywheel magnet generator for an internal combustion engine. In these figures, 1 is a flywheel magnet rotor and 2 is a stator. The magnet rotor 1 includes an iron flywheel 101 formed in a cup shape and a peripheral wall portion 101a of the flywheel.
And a permanent magnet 102 fixed to the inner circumference of the.
The body portion 103a of the boss 103 is fitted into a hole provided at the center of the bottom wall portion 101b of the flywheel 101, and the collar portion 103a provided at one end of the boss 103 has a rib 103a.
It is fastened to the bottom wall portion 101b of the flywheel by 04. A taper hole 103c for fitting the output shaft of the engine is formed in the body portion 103a of the boss 103.

Four permanent magnets 102 are provided, the four permanent magnets are arranged side by side at 90 degree intervals, and the permanent magnets are radially arranged so that N poles and S poles are alternately arranged in the circumferential direction. It is magnetized to form a 4-pole field.

Instead of providing four permanent magnets, a magnet having a substantially ring shape may be fixed to the inner circumference of the flywheel to magnetize the magnets into four poles.

The stator 2 is composed of an ignition armature 4 and a general load armature 5'which are fixed on a fixed base plate 3. As shown in FIG. 4, the ignition armature 4 includes the rotor 1
I-shaped iron core 4 having magnetic pole portions 401a and 401b at both ends, which are opposed to the magnetic poles of the magnetic poles 4 through a predetermined air gap.
01 is wound with an exciter coil 402, and both ends of the iron core 401 are fastened to the fixed base plate 3 by screws 7. The general load armature 5'is also formed by winding a general load generating coil 502 'around an I-shaped iron core 501' having magnetic pole portions 501a 'and 501b' at both ends, and the both ends of the iron core 501 'are screwed. It is fastened to the fixed base plate 3 by 7. Magnetic pole portions 4 at both ends of the iron core 401
01a, 401b and the magnetic poles 501a ', 501b' at both ends of the iron core 501 'are both set at 90 degrees, and in the process of the magnet rotor 1 rotating, Adjacent magnetic poles (N and S poles) can face the magnetic pole portions at both ends of each armature.

A pair of lead wires 8 are connected to both ends of the exciter coil 402, and one end 502a 'of the magneto coil 502' is grounded to the iron core 501 '. The lead wire 9 is connected to the other end of the power generation coil 502 ', and the lead wires 8 and 9 are led out to the outside through holes provided in the base plate 3. Reference numeral 10 is a clamp tool for clamping the lead wire 8, 11 is a ground wire of an electrical component such as an ignition device (not shown), and a terminal fitting connected to the end of the ground wire 11 is clamped together with the clamp tool 10 to the base plate 3 by a screw 11. It is fixed.

The general load generating coil 502 'is used for charging a battery, driving a lighting load such as a headlight, and supplying power to a power supply circuit for driving a fuel injection device. In the present specification, electrical component loads other than the ignition device, such as a battery charging circuit and a lighting load, are referred to as general loads.

The exciter coil 402 is used, for example, as a power source for charging a capacitor of a capacitor discharge type internal combustion engine ignition device. As is well known, a capacitor discharge type ignition device includes an ignition coil, an ignition energy storage capacitor which is provided on the primary side of the ignition coil and is charged by the output of one half cycle of the exciter coil, and an ignition signal. A discharge switch element that conducts when applied and discharges the electric charge of the capacitor to the primary coil of the ignition coil, and the ignition coil is generated by a change in magnetic flux generated in the ignition coil when the capacitor discharges. A high voltage for ignition is induced in the secondary coil of the coil.

In the capacitor discharge type ignition device,
Since the exciter coil 402 needs to induce a high voltage of about 200 [V], it is wound many times using a thin coil conductor. Therefore, the exciter coil 4
02 has a considerably large outer diameter and occupies a considerably large space inside the magnet rotor 1.

As shown in FIG. 5A, a hole 3 through which the output shaft 13 of the internal combustion engine 12 penetrates is provided in the central portion of the fixed base plate 3.
No. 01 is provided, and two arc-shaped elongated holes 302, 302 are provided at 180 ° intervals on the outer peripheral portion of the fixed base plate. The fixing base plate 3 is fixed to the case of the engine by screwing the bolts 14 penetrating the long holes 302, 302 into the screw holes provided in the case 12a of the engine.

As shown in FIG. 5A, the tapered portion provided at the tip of the output shaft 13 of the internal combustion engine 12 is fitted into the tapered hole 103c of the boss 103 of the flywheel. A nut 15 is screwed into a threaded portion provided at the tip of the output shaft 13, and the flywheel 10 is tightened by tightening the nut.
1 is attached to the output shaft 13 of the engine.

Each of the long holes 302 provided in the fixed base plate is provided so that the center of the arc thereof coincides with the center of the output shaft of the engine (the center of the hole 301) and penetrates the long holes 302, 302. With the bolts 14 loosened, the base plate 3 can be rotated around the output shaft of the engine by a predetermined angle. By rotating the base plate 3 in this manner, a predetermined rotation angle of the engine can be obtained. The position of the ignition armature 4 is adjusted so that in position the exciter coil 4 induces a half cycle voltage for driving the ignition device.

Recently, for internal combustion engines that drive vehicles such as vehicles and snowmobiles, demands for purification of exhaust gas and improvement of fuel consumption have become strict, and accordingly, fuel injection devices have been adopted, It has become necessary to control the ignition timing by a microcomputer. Therefore, the load of the electrical equipment to be driven by the general load generator coil of the magnet generator tends to increase, and a single generator coil wound around the I-shaped iron core 501 ′ as shown in FIGS. 3 and 4. In 502 ', there was a problem that it could not cope with the increasing load.

Therefore, for example, as shown in Japanese Utility Model Publication No. 51-136406, a multipole core having four salient poles radially is used, and a generator coil is wound around each salient pole of the multipole core. A magneto-generator has been proposed in which the output of the general-purpose magneto coil is increased by adopting a rotating configuration.

[0016]

In the magneto-generator shown in FIGS. 3 and 4, since the relatively large space is formed between the armatures 4 and 5 ', the long holes 302 and 302 are formed in the armatures 4 and 5'. And 5'can be provided in a state of being positioned inside the outer peripheral portion of the magnetic pole portion. Therefore, the outer diameter of the fixed base slope 3 can be made substantially equal to the outer diameter of the magnetic pole portions of the armatures 4 and 5 ', and as shown in FIG. The head of the magnet 1 of the magnet rotor 1
It can be located inside 02. for that reason,
The magnet rotor 1 can be brought close to the fixed base slope 3, and the axial dimension h1 of the magnet generator can be shortened.

On the other hand, when a multi-pole iron core is used as the iron core of the general load armature, a large space is formed between the ignition armature and the general load armature so that a long hole can be formed. Since it could not be secured, as shown in FIG. 5B, it was necessary to provide the long hole 302 of the fixed base slope in a state of being positioned outside the magnetic poles of the armatures 4, 5 ′. . Therefore, the bolt 14 for fixing the fixed base 3 to the case of the engine is attached to the magnet 1 of the flywheel magnet rotor 1.
It is necessary to position it near 02. In order to prevent the head of the bolt 14 and the magnet rotor 1 from interfering with each other, it is necessary to increase the gap between the magnet rotor 1 and the fixed base slope 3. It becomes necessary, the axial dimension h2 of the magnet generator
Grows larger.

As described above, in the conventional magnet generator, the output of the armature for general load cannot be increased when the dimension in the axial direction is made small, and the multipole iron core is used for the armature for general load. Attempting to increase the output has a problem that the axial dimension of the generator becomes large.

An object of the present invention is to provide a flywheel magnet generator for an internal combustion engine capable of increasing the output of a general load armature without increasing the axial dimension of the generator. is there.

[0020]

DISCLOSURE OF THE INVENTION In the present invention, a four-pole flywheel magnet rotation in which four permanent magnets are fixed at 90 degree intervals on the inner periphery of the peripheral wall portion of a flywheel formed in a cup shape. And a magnetic pole portion opposed to the magnetic pole of the magnet rotor at both ends, and the angular interval between the magnetic pole portions at both ends is 9
An ignition armature formed by winding an exciter coil used as a power source of an ignition device for an internal combustion engine around an I-shaped iron core set at 0 degrees, a C-shaped yoke portion, and a radial shape from the outer periphery of the yoke portion. The first to fifth salient pole portions of the multi-pole core, which are provided in a protruding state and have first to fifth salient pole portions arranged side by side in order on one side in the circumferential direction, respectively have first to fifth salient pole portions. An armature for general load formed by winding a magneto coil of No. 5 is provided, and the first salient pole portion of the armature for general load is positioned at a position adjacent to one end side of the I-shaped iron core. With the fifth salient pole portion of the multi-pole iron core located on the other end side,
The ignition armature 4 and the general load armature 5 are attached to the fixed base plate.

Of the first to fifth salient pole portions of the multipole core, the first and fifth salient pole portions located at both ends are provided at 180 ° intervals, and the first and fifth salient pole portions are located at the central portion of the multipole core. The third salient pole portion is provided at a position 90 degrees away from the first salient pole portion on one side in the circumferential direction. Further, the second salient pole portion located between the first salient pole portion and the third salient pole portion of the multi-pole iron core is 45 + α degrees (α > 0) a fourth position which is provided at a distant position and is located between the third salient pole portion and the fifth salient pole portion.
The salient pole portion is provided at a position 90 degrees away from the second salient pole portion on one side in the circumferential direction. The angular interval between the fifth salient pole portion and the magnetic pole portion on the other end side of the I-shaped iron core is set to 45 + α degrees or more.

In the present invention, between the first magneto coil and the second magneto coil and between the fifth magneto coil and the I magneto coil.
Forming arc-shaped first and second elongated holes in the fixed base plate in a state of being respectively positioned between the fixed base plate and the other end of the character-shaped iron core, and making the fixed base plate penetrate the first and second long holes. It is fixed to the internal combustion engine with bolts.

The value of α is set to a value necessary for rotating the fixed base slope by a required angle in a state where the bolts penetrating the elongated holes are loosened. Generally, it is set to ½ or more of the required rotation range of the fixed base slope in the state where the bolt penetrates each long hole.

The C-shape of the "C-shaped yoke" is
The shape is not limited to the arc shape, as long as it is a shape in which a part of a ring-shaped or polygonal ring-shaped body is separated to form a substantially C-shape.

[0025]

With the above construction, the first magneto coil, the third magneto coil, and the fifth magneto coil wound around the salient pole portions arranged at an angular interval of 90 degrees from each other have respective polarities. By connecting in series or in parallel, the output of the first phase can be taken out, and by connecting the second and fourth magneto coils in series or in parallel with matching polarities, The output of the phase can be taken out. By using these outputs as appropriate,
It is possible to drive electric components such as a lamp load, a fuel injection device, a control device that controls each part of the internal combustion engine, and a battery charging circuit.

As described above, the second salient pole portion is arranged at a position separated by 45 + α degrees from the first salient pole portion, and the fifth salient pole portion and the magnetic pole portion on the other end side of the I-shaped iron core. Angular distance between and 4
When it is set to 5 + α degrees or more, by appropriately setting α, the first and second power generating coils, and between the fifth power generating coil and the other end of the I-shaped iron core respectively It is possible to secure a space for forming the second elongated hole. Therefore, the first and second elongated holes can be provided inside the outer peripheral portion of the magnetic pole portion of the armature core, and the axial dimension of the magneto-generator can be prevented from becoming long.

[0027]

1 and 2 show an embodiment of the present invention. In these figures, the same parts as those in FIGS. 3 and 4 are designated by the same reference numerals.

In FIGS. 1 and 2, reference numeral 1 denotes a flywheel in which a permanent magnet 102 is attached to the inner periphery of a peripheral wall portion 101a of a flywheel 101 formed in a cup shape, and the permanent magnet forms a 4-pole field. It is a magnet rotor. A boss 103 is riveted to the center of the bottom wall of the flywheel 101, and a taper hole 10 provided in the boss 103 is provided.
The output shaft of the engine is fitted to 3c. The configuration of this flywheel magnet rotor is similar to that shown in FIGS. 3 and 4, and the four magnetic pole portions of this rotor are provided at intervals of 90 degrees.

Reference numeral 2 denotes a stator, which is a fixed base plate 3
And an armature for ignition 4 and an armature 5 for general load fixed on the fixed base plate 3, the fixed base plate 3 has a hole 301 for penetrating the rotation shaft of the engine in the central portion. Have.

The ignition armature 4 faces the magnetic poles of the rotor 1 through a predetermined air gap and has a magnetic pole portion 401.
The exciter coil 402 is wound around an I-shaped iron core 401 having a and 401b at both ends, and both ends of the iron core 401 are fastened to the fixed base plate 3 by screws 7.

The general load armature 5 is provided with a yoke portion Y having a C-shape (in this embodiment, an arc shape) and a radially projecting portion from the outer circumference of the yoke portion Y, and is arranged in one of the circumferential directions. On the side of (in the example shown, clockwise)
To multipole iron core 50 having fifth to fifth salient pole portions P1 to P5
1 and first to fifth power generating coils W1 to W5 respectively wound around the first to fifth salient pole portions P1 to P5 of the multi-pole iron core.

In this general load armature 5, the first salient pole portion P1 of the general load armature 5 is positioned adjacent to the magnetic pole portion 401a on one end side of the I-shaped iron core 401 of the ignition armature 4. Then, the fifth salient pole portion P5 of the multi-pole iron core 501 is arranged at the other end side of the I-shaped iron core 401, and the yoke portion Y of the multi-pole iron core 501 is fixed by the screw 7 to the fixing base plate 3 Has been concluded.

In the case of constructing a 5-pole multi-pole iron core, the angle interval between adjacent salient pole portions is usually set to 45 degrees, but in the present invention, the fixed base plate is used. Three
The armature 4 is provided with two arc-shaped long holes provided at an interval of 180 degrees.
The first to fifth salient pole portions are irregularly provided so that the magnetic pole portions 5 and 5 can be located inside the outer peripheral portion.

That is, of the first to fifth salient pole portions P1 to P5 of the multi-pole iron core 501, the first and fifth salient pole portions P1 and P5 located at both ends are provided at an interval of 180 degrees. The third salient pole portion P3 located in the central portion of the pole iron 501 is provided at a position 90 degrees away from the first salient pole portion P1 on one side in the circumferential direction. The P1, the third salient pole portion P3, and the fifth salient pole portion P5 can face the three magnetic pole portions of the magnet rotor.

The second salient pole portion P2 located between the first salient pole portion P1 and the third salient pole portion P3 of the multi-pole iron core 501 is one of the first salient pole portion P1 in the circumferential direction. The fourth salient pole portion P4 which is provided at a position 45 + α degrees (α> 0) apart on the side of and is located between the third salient pole portion P3 and the fifth salient pole portion P5.
Is provided at a position 90 degrees away from the second salient pole portion P2 on one side in the circumferential direction. The second salient pole portion P2 and the fourth salient pole portion P4 face two adjacent magnetic pole portions of the magnet rotor in the process of rotation of the magnet rotor. The angle between the fifth salient pole portion P5 and the magnetic pole portion 401b on the other end side of the I-shaped iron core is formed so that the elongated holes can be formed inside the outer peripheral portions of the magnetic pole portions of the armatures 4 and 5. The interval is set to 45 + α degrees or more.

Between the first magneto coil W1 and the second magneto coil W2 and between the fifth magneto coil W5 and the I-shaped iron core 40
The first and second elongated holes 3 formed in an arc shape on the fixed base plate in a state of being respectively positioned between the magnetic pole portion 401b on the other end side of 1
02a and 302b are formed, and the fixing base plate 3 is fixed to the case of the internal combustion engine by bolts that penetrate the first and second elongated holes 302a and 302b.

As described above, the second salient pole portion P2 is arranged at a position separated by 45 + α degrees from the first salient pole portion P1, and the fifth salient pole portion P5 and the other end of the I-shaped iron core 401 are arranged. Side magnetic pole part 4
If the angle interval between the first and the second magneto coils is set to 45 + α degrees or more, the α is appropriately set so that the fifth magneto coil and the I-shaped core Spaces for forming the first and second elongated holes can be secured between the ends. Here, the value of the angle α is set to a value necessary for rotating the fixed base slope by a required angle in a state where the bolts penetrating the elongated holes are loosened. In this embodiment, as shown in FIG.
The angle α is set to be equal to ½ of the required rotation range of the fixed base slope 3. In FIG. 2, chain lines O1 and O2 indicate the center positions of the bolts when the bolts are respectively brought into contact with one end and the other end of the long hole 302a, and the angle 2α between the chain lines O1 and O2 is the fixing base. This is the turning range of the plate.

In summary, the present invention is a 5-pole multi-pole iron core 50.
Of the first salient pole portion, the second salient pole portion P2 and the fourth salient pole portion P4
Of the first generator coil W1 by displacing the position of
And a second power generation coil WP2, a space for forming the elongated hole 302a is secured, and the angular interval between the fifth salient pole portion P5 and the I-shaped iron core 401 is set to the first salient pole portion P1. And I
By setting the angular interval larger than the angular interval between the I-shaped iron core 401 and the fifth generator coil W5.
A space for forming the long hole 302b is secured between the and. With this structure, the two long holes 3 through which the bolts for attaching the fixed base plate 3 to the engine penetrate
02a and 302b can be provided inside the outer circumferences of the magnetic pole portions of the iron cores 401 and 501, so that the gap between the magnet rotor 1 and the fixed base plate 3 is similar to the example shown in FIG. Can be reduced to shorten the axial dimension h1 of the magneto-generator.

In the magneto-generator of this embodiment, the first magneto coil W1, the third magneto coil W3, and the fifth magneto coil W5 are connected in series via a crossover wire in a state where their polarities are matched. It is connected to the. The second magneto coil W2 and the fourth magneto coil W4 are connected in series with a crossover wire in a state where their polarities are matched,
1. Lead wires connected to both ends of the series circuit of 1, W3 and W5, lead wires connected to both ends of the series circuit of the generator coils W2 and W4, and lead wires connected to both ends of the exciter coil 402 of the ignition armature. The lead wire group 20 including the lead wire 20 is led out to the back surface side of the fixed base plate 3 through a hole provided in the fixed base plate 3. These lead wire groups are inserted into an insulating coating tube and pulled out as a wire harness.

[0040]

As described above, according to the present invention, the I-shaped iron core is used as the iron core of the ignition armature, and the 5-pole multipole iron core is used as the iron core of the general load armature. It is possible to increase the output of the general load armature while ensuring a sufficient winding space for the exciter coil.

Further, according to the present invention, the positions of the second salient pole portion and the fourth salient pole portion of the multi-pole iron core used for the armature for general load are deviated so that the first magneto coil and the second salient pole can be displaced from each other. Secure a space to provide an arcuate long hole with the generator coil,
Furthermore, the angular interval between the fifth salient pole portion and the I-shaped iron core is set to the first
By setting it larger than the angular interval between the salient pole portion and the I-shaped iron core, a space for providing an arc-shaped long hole was secured between the fifth magneto coil and the I-shaped iron core. Two elongated holes through which bolts for attaching the plate to the engine can be provided inside the outer peripheral portion of the magnetic pole portion of the armature core. Therefore, there is an advantage that the output of the armature for general load can be increased without increasing the axial dimension of the magneto generator.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a front view showing the structure of a stator used in the embodiment of FIG.

FIG. 3 is a vertical cross-sectional view of a conventional magnet generator.

FIG. 4 is a front view showing a configuration of a stator of the magneto generator of FIG.

5A is a half longitudinal sectional view showing a state in which the conventional magnet generator shown in FIG. 3 is attached to an engine. (B) is a half longitudinal sectional view showing a state in which another conventional magnet generator is attached to the engine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flywheel magnet rotor 101 Flywheel 101a Peripheral wall part 102 Permanent magnet 2 Stator 3 Fixed base plate 4 Ignition armature 401 I-shaped iron core 402 Exciter coil 5 General load armature 501 Multipole iron Y Y yoke part P1 ~ P5 salient pole part W1 to W5 generator coil

Claims (1)

[Claims] 1. A four-pole flywheel magnet rotor in which four permanent magnets are fixed at 90-degree intervals on the inner periphery of a cup-shaped flywheel peripheral wall portion, and magnetic poles of the magnet rotor. Ignition formed by winding an exciter coil used as a power source of an internal combustion engine ignition device around an I-shaped iron core having magnetic pole portions facing each other at both ends and angular intervals between the magnetic pole portions at both ends set to 90 degrees. Armature, C-shaped yoke portion, and first to fifth salient pole portions provided in a state of radially projecting from the outer periphery of the yoke portion and arranged side by side in order on one side in the circumferential direction. First multi-pole iron core with
To a fifth salient pole portion, and a general load armature formed by winding the first to fifth magneto coils, respectively, and the general load armature is provided at a position adjacent to one end of the I-shaped iron core. Of the ignition armature and the general load armature with the first salient pole portion of the I-shaped iron core positioned and the fifth salient pole portion of the multi-pole iron core positioned at the other end of the I-shaped iron core. The first to fifth salient pole portions of the first to fifth salient pole portions of the multi-pole iron core, which are attached to the plate, are provided at 180 ° intervals at both ends, and the central portion of the multi-pole iron core is provided. A third salient pole portion located at a position 90 degrees away from the first salient pole portion on one side in the circumferential direction, and the third salient pole portion and the third salient pole portion of the multi-pole iron core. The second salient pole portion located between the salient pole portion and the first salient pole portion is located at a position 45 + α degrees (α> 0) away from the first salient pole portion on one side in the circumferential direction. A fourth portion provided between the third salient pole portion and the fifth salient pole portion.
Of the salient pole portion is provided at a position 90 degrees away from the second salient pole portion on one side in the circumferential direction, and the fifth salient pole portion and the magnetic pole portion on the other end side of the I-shaped iron core are Is set to 45 + α degrees or more, and is positioned between the first magneto coil and the second magneto coil and between the fifth magneto coil and the other end of the I-shaped iron core, respectively. In this state, arc-shaped first and second elongated holes are formed in the fixed base plate, and the fixed base plate is fixed to the internal combustion engine by a bolt penetrating the first and second elongated holes. A flywheel magnet generator for an internal combustion engine, which is characterized in that