JP2879843B2 - Power supply for motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply for a motorcycle, and more particularly to a power supply for a motorcycle having a magnet generator.

[0002]

2. Description of the Related Art In general, when a generator is connected to an engine of a motorcycle such as a motorcycle, a magnet generator is widely used because a desired output can be obtained by simplifying the structure. In this type of conventional magnet generator, permanent magnets are circumferentially spaced from each other on a stator around which a generator coil is wound and a yoke made of a magnetic material rotatably supported outside the stator. And a rotator disposed concentrically with the radiator, and is configured so that power is generated by an emission coil by rotation of a permanent magnet of the rotator.

In a generator having a field coil such as an alternator mounted on a four-wheeled vehicle, it is possible to control the output to a desired value by controlling a field current flowing through the field coil. it can. On the other hand, in a magnet generator, since the field is formed by permanent magnets, it is impossible to control the field, and inevitably the power is generated by providing an output regulator on the output side of the magnet generator. The output is controlled to a desired value by short-circuiting the coil.

[0004]

However, the conventional power supply for a motorcycle using a magnet generator has the following problems. When a magnet generator is mounted on a motorcycle, the capacity of the magnet generator is determined by the maximum output value required from the motorcycle, so a magnet generator with the maximum output capability is required. Become. When a magnet generator having a capacity corresponding to the maximum output value is used for a power supply unit for a motorcycle, electric power is generated at the maximum capacity of the magnet generator, and excess power of the maximum power is generated by the output regulator. As a result, the power generation efficiency decreases and the fuel efficiency of the motorcycle decreases.

An object of the present invention is to provide a magnet generator capable of increasing the power generation efficiency of the entire system and suppressing fuel consumption while suppressing the performance of the magnet generator.

[0006]

A magnet generator according to the present invention includes a magnet generator and an output regulator connected to the magnet generator, and the magnet generator has an electro-magnetic coil wound thereon. And a rotor in which permanent magnets are arranged concentrically at circumferentially spaced intervals on a yoke made of a magnetic material rotatably supported outside the stator. In a two-wheeled vehicle power supply device configured to generate electric power by an electro-generating coil by rotation of a permanent magnet of a rotor, the rotor of the magnet generator includes a control unit made of a magnetic material between permanent magnets. The magnetic poles are provided respectively, and a field control coil is disposed on the stator of the magnet generator so as to form a closed magnetic path passing through the yoke of the rotor and the control magnetic pole. Sui It is connected to a battery via a switch, wherein the output is energized is configured to increase when this switch is closed.

[0007]

According to the above means, the control magnetic poles made of a magnetic material are alternately arranged on the rotor and the permanent magnets, and the field control coils are wound on the stator. In the case where the magnetic force is insufficient, the magnetic force can be reinforced by forming a closed magnetic path passing through the yoke and the control magnetic pole by the field control coil. Therefore, when the changeover switch is closed and the field control coil is excited, the field strength is reinforced by the control magnetic pole.
The power generated by the magnet generator will be increased accordingly.

In other words, during the daytime when power is much less than at night, the capability of the magnet generator itself can be reduced in advance by operating the magnet generator in a state where the field control coil is not energized. Thus, the size of the entire power supply device for a motorcycle can be reduced, the power generation efficiency can be relatively increased, and the fuel efficiency can be improved.

[0009]

FIG. 1 is a schematic view showing a power supply device for a motorcycle according to an embodiment of the present invention. 2A and 2B show a magnet generator used in the power supply device for a motorcycle, in which FIG. 2A is a partially omitted front sectional view, and FIG. 2B is a side sectional view thereof. FIG. 3 is a diagram for explaining the operation.

In the present embodiment, the power supply device for a motorcycle according to the present invention includes a battery 1, a regulator 2 also serving as a rectifier, and a magnet generator 3. The magnet generator 3 includes a stator arranged and fixed to an engine case (not shown) of the engine, and a rotor connected to a crankshaft (not shown) of the engine. The magnet generator 3 is configured to be driven by an engine via a crankshaft to generate power.

The rotor 4 of the magnet generator 3 is configured to also serve as a field element of the generator and a flywheel of the engine. The rotor 4 is made of a magnetic material such as iron, and is formed in a short cylindrical shape with a bottom. The yoke 5 is concentrically arranged on the inner surface of the bottom wall of the yoke 5 and integrally protrudes therefrom. And a cylindrical boss member 6. When the boss member 6 is tapered to the crankshaft and fastened by fastening means (not shown) such as bolts, the rotor 4 is fixed so as to rotate integrally with the crankshaft.

A case 7 made of a non-magnetic material such as a resin is fitted and fixed to the inner peripheral surface of the yoke 5. The case 7 includes a plurality of partition walls that are erected at intervals in the circumferential direction, and a permanent magnet 8 for forming a field pole and a magnetic material such as iron are provided between adjacent partition walls. A plurality of control magnetic poles 9 made of a material (a material having a high magnetic permeability) are fixed in a plural number alternately at intervals in the circumferential direction.

The permanent magnets 8 and the control magnetic poles 9 are formed in arc-shaped rectangular parallelepipeds having substantially the same size as each other, and are arranged alternately at equal intervals in the circumferential direction. Adjacent permanent magnets 8 are arranged at the same polarity, and the counter electrode is formed by a control magnetic pole 9 therebetween.

The magnet generator 3 has a stator 11 as an armature. The stator 11 is made of a magnetic material such as iron, and is formed in a substantially star-shaped short disk shape.
3 is provided. The core 13 is disposed concentrically with the crankshaft on the outer surface of the engine case and is brought into contact therewith. The core 13 is fastened and fixed by bolts 12 as fastening means. The rotor 4 is arranged outside the stator 11 fixed to the engine case so as to surround the outer periphery thereof. The rotor 4 moves around the stator 11 by driving the crankshaft. It is designed to rotate.

The core 13 is formed by laminating and integrating a number of thin plates made of a magnetic material such as iron, and has a body 14 formed in a donut shape. A plurality of salient poles 15 are provided radially on the outer periphery of the core body 14. Each of the salient poles 15 is wound with a three-phase electron generating coil 16 in a concentrated winding.
As shown in FIG. 1, the battery 1 and a headlight and other loads (both not shown) are connected via a regulator 2. In FIG. 2A, the illustration of the emission coil 16 is omitted for convenience.

A field control coil 17 for controlling a field magnetic flux is formed in a cylindrical shape on the end face of the core body 14 opposite to the engine case, and is arranged concentrically and fixed with bolts 12. . As shown in FIG. 1, the field control coil 17 is connected to the day / night changeover switch 1.
8 and connected to the battery 1. The day / night switch 18 is configured so as to be switched between a night contact 18a and a day contact 18b in conjunction with a headlight switch (not shown) of the motorcycle.

The winding method of the field control coil 17 is the stator 1
1 and the rotor 4 are concentric. Therefore, the magnetic flux F of the field control coil 17 is mostly composed of the salient poles 15 facing the main body 14 of the core 13, the control magnetic poles 19,
The closed magnetic path passing through the control magnetic pole 9, the yoke 5, the boss member 6, and the core 13 of the rotor 4 is formed in an annular shape.

Next, the operation will be described. When the crankshaft is rotated by the engine, the rotor 4 is rotated. Then, an electromotive force is generated in the electromotive coil 16, and this electromotive force is supplied to a battery or a load as generated power.

Here, when the headlight switch is turned off and the day / night changeover switch 18 is turned on to the day side contact 18b, when the field control coil 17 is not electrically connected to the battery 1, the field control coil 17 is turned off. , Each control pole 9 is merely magnetized by the permanent magnet 8. That is,
In the daytime, the magnetic flux of the field in the rotor 4 is dependent on the magnetic flux of each permanent magnet 8.

By the way, as described above, in the case of a normal magnet generator (flywheel magneto) used for a motorcycle, output control is impossible, and therefore, as shown in FIG. It is necessary to set so as to show a so-called saturation characteristic curve (the current value sharply increases up to a certain rotation speed, and becomes substantially constant at a higher rotation speed). On the other hand, the output characteristics required by the battery and the load on the motorcycle side are similar saturation characteristic curves.

By turning on the headline and other lamps at night, as shown in FIG. 3, the output characteristics required by the battery and the load on the motorcycle side greatly increase from the saturation characteristic curves a to b. , It is necessary to increase the saturation characteristic curve of the output characteristic of the magnet generator 3 from a to b.

However, as described above, in the conventional power supply device for a motorcycle, since the capacity of the magnet generator itself cannot be increased, a magnet generator having a capacity suitable for nighttime output characteristics is used in advance. ing. Therefore, in the conventional magnet generator, the extra power generated by the magnet generator is always discarded as heat by the regulator during the daytime. This is not a favorable situation from the viewpoint of energy saving.

However, in this embodiment, the control poles 9 made of a magnetic material are alternately arranged with the permanent magnets 8 on the rotor 4 and the field control coils 17 on the stator 11.
Is wound, the saturation characteristic curve can be changed from a to b. That is, when the magnetic force of the permanent magnet 8 of the rotor 4 is insufficient, the magnetic force can be reinforced by the field control coil 17. In other words, different conditions between the magnet generator requiring a strong magnetic flux and the magnet generator requiring a weak magnetic flux can be adjusted as desired by controlling the increase and decrease of the magnetic force by the field control coil 17.

In this embodiment, when a situation occurs in which the saturation characteristic curve is increased from a to b by turning on the headlights and other lamps at night, that is, the permanent magnet 8 of the rotor 4 When the magnetic force is insufficient with the group alone, the daylight / night changeover switch 18 is automatically turned on to the night side contact 18a by turning on the headlight switch, so that the magnet generator 3 used in the power supply device for a motorcycle is used. In the state, the field control coil 17 is connected to the battery 1, and the field control coil 17 receives the power of the battery 1.

When power is supplied from the battery 1 to the field control coil 17, the field control coil 17 is excited. The magnetic flux F generated by the excited field control coil 17 is applied to the main body 1 of the core 13.
4, the salient pole 15, the control pole 9 of the rotor 4, the yoke 5, the boss member 6, and the closed magnetic path of the core 13 are connected to the salient pole 5 and the control pole of the rotor 4 facing the control pole 9 of the stator 11. 9
Are formed annularly over the entire circumference.

Since the control magnetic pole 9 becomes the field pole by the magnetic flux F generated by the field control coil 17, the rotor 4
The control magnetic pole 9 is added to each of the permanent magnets 8 in the field magnetic poles. Since the strong magnetic flux cuts off the generating coil 16 by the addition of the control magnetic pole 9, the electromotive force of the generating coil 16 increases. In other words, the case where the field poles of the rotor 4 are constituted by the group of permanent magnets 8 is referred to as a saturation characteristic curve a, and the field poles of the rotor 4 are grouped by the group of permanent magnets 8 and the group of control poles 9 by the exciting force of the field control coil 17. Is assumed to be the saturation characteristic curve b, the electromotive force generated by the emission coil 16 is increased from a to b.

As described above, according to this embodiment,
The output of the magnet generator 3 can be increased or decreased by controlling the field by the field control coil 17 and the control magnetic pole 9 by switching the day / night changeover switch 18, so that the capability of the magnet generator 3 used in the power supply device for a motorcycle is reduced. It is not necessary to set a large value corresponding to the maximum output characteristic required at night, and the scale of the entire power supply device for a motorcycle can be reduced.

That is, the permanent magnet 8 in the magnet generator 3
And the winding conditions of the power generation coil 16 can be set to values suitable for the output characteristics required during the daytime (for example, the characteristic curve in FIG. 3A). The maximum characteristic required at night (for example, the characteristic curve in FIG.
7 can be dealt with by energizing.

By constructing the power supply device for a motorcycle in this manner, the power generated by the magnet generator 3 does not need to be constantly discarded by the regulator 2 during daytime running. The power generation efficiency of the power supply device as a whole can be improved, and the fuel efficiency of the motorcycle can be improved. On the other hand, when driving at night, the power generation capability of the magnet generator 3 itself can be increased by energizing the field control coil 17, so that it is possible not only to prevent trouble from running at night, but also to use a battery. 1 can be avoided beforehand.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the scope of the present invention.

For example, the structure of the core, the number and structure of the salient poles in the stator, the method of winding the electrogenic coil, and the method of controlling the electrogenic coil are not limited to the configurations and methods of the above-described embodiment. Absent.

[0032]

As described above, according to the present invention,
Since the output of the magnet generator can be increased or decreased by controlling the field by the field control coil and the control pole by switching the changeover switch, the capability of the magnet generator used in the power supply device for the motorcycle is adjusted to a large value corresponding to the maximum output characteristic. It is not necessary to set it to a value, the scale of the entire motorcycle power supply system can be reduced, and the power generation efficiency of the magnet generator and the motorcycle power supply as a whole can be increased. Fuel efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a power supply device for a motorcycle according to an embodiment of the present invention.

FIG. 2 shows a magnet generator used in the power supply device for a motorcycle, and FIG.
(B) is a side sectional view thereof.

FIG. 3 is a diagram for explaining the operation.

[Description of sign]

DESCRIPTION OF SYMBOLS 1 ... Battery, 2 ... Regulator, 3 ... Magnet generator, 4 ... Rotor, 5 ... Yoke, 6 ... Boss member, 7 ... Case, 8 ... Permanent magnet, 9 ... Control magnetic pole, 11 ... Stator, 12
... bolt, 13 ... core, 14 ... core body, 15 ... salient pole,
16: Emission coil, 17: Field control coil, 18: Day / night switch, 18a: Night contact, 18b: Day contact, F: Magnetic flux of the field control coil.

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H02K 21/00 H02K 29/00 H02K 19/00 H02P 9/00

Claims (1)

(57) [Claims] A magnet generator, and an output regulator connected to the magnet generator, wherein the magnet generator includes a stator around which an electromotive coil is wound, and a stator outside the stator. A permanent magnet is provided on a yoke made of a magnetic material rotatably supported, and the rotor is arranged concentrically at intervals in the circumferential direction. In the power supply device for a two-wheeled vehicle configured to generate electric power, a control magnetic pole made of a magnetic material is interposed between permanent magnets in a rotor of the magnet generator, and A field control coil is arranged on the stator of the machine so as to form a closed magnetic path passing through the yoke and the control magnetic pole of the rotor. The field control coil is connected to a battery via a changeover switch. Switch motorcycle power supply and wherein the output is energized is configured to increase when is closed.