JP2009284645A - Magnetogenerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a magnetogenerator compatible with the latest demand for an increase in current generation and also with a demand for reduction in weight and space for an engine. <P>SOLUTION: The magnetogenerator includes a rotor made by arranging a plurality of magnets 2 on a cylindrical portion of a flywheel 1, and two stator cores 4a and 4b wound with coils 6a and 6b that are disposed counter to the magnets 2. Teeth 5a formed on the first stator core 4a and teeth 5b formed on the second stator core 4b are arranged to be shifted to each other in a rotation direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a magnet generator that generates power by electromagnetic induction between a magnet and an armature winding by rotation of a flywheel.

The magnet generator is composed of a rotor and a stator. In the rotor, a plurality of magnets are alternately arranged NS on the inner wall of a cylindrical portion of a flywheel having a cylindrical portion. In the stator, a coil is wound around a plurality of teeth protruding on the outer periphery of an iron core in which a plurality of thin steel plates are laminated.
The flywheel is fastened to the crankshaft of the engine, and the stator is fixed on the engine side so that the stator core faces a magnet installed on the flywheel. As the flywheel rotates, a current is generated in the stator coil facing the magnet.
In recent years, the total power consumption has increased with the increase in electrical components, and there is a demand for an increase in power generation.
As a method of increasing the amount of power generated by a conventional generator, there is a method in which two rows of flywheels are arranged in the direction of the rotation axis at the tip of a crankshaft as shown in Patent Document 1 and independent stators corresponding to each are installed. .

Japanese Patent Laid-Open No. 10-4650

  When installing two pairs of flywheels and two corresponding stators located side by side in the axial direction of the crankshaft as before, the requirement for increased power generation is satisfied, but the required space is greatly increased. There is a problem of doing. Furthermore, the weight of the generator increases, and the burden on the crankshaft increases as the weight of the rotor increases. There is also a problem that the number of parts and man-hours of the generator increase.

  An object of the present invention is to provide a generator that can increase the amount of power generation at low cost without increasing space and weight.

  In the magnet generator according to the present invention, a flywheel having a cylindrical portion and rotating around a rotation shaft, a plurality of magnets arranged on the inner periphery of the cylindrical portion and rotating together with the flywheel, and a plurality of protrusions protruding to the outer periphery A magnet generator comprising a first stator core and a second stator core that have teeth and face the plurality of magnets, and a power generation coil wound around each of the teeth. The stator core and the second stator core are arranged in layers in the direction of the rotation axis, and the teeth provided on the first stator core and the teeth provided on the second stator core are arranged with respect to the rotation direction. It was arranged so that it was shifted.

  By applying the present invention, interference between the coils wound around the first and second stator cores is eliminated, so that the interval between the first and second stator cores can be extremely reduced, and the shaft of the magnet generator The length can be shortened and the size can be reduced. For this reason, the effect of reducing space and reducing the burden on the crankshaft can be obtained.

Embodiment 1 FIG.
FIG. 1 shows a magnet generator according to Embodiment 1 of the present invention. 1A is a plan view of a magnet generator, FIG. 1B is an explanatory view showing a cross section AA of FIG. 1A, and FIG. 1C is a cross section BB of FIG. 1A. It is explanatory drawing which shows.
In FIG. 1, 1 is a flywheel having a cylindrical portion, 2 is a plurality of magnets arranged on the inner wall of the cylindrical portion of the flywheel, and 3 is a crankshaft to which the flywheel 1 is fastened. Reference numerals 4a and 4b denote a first stator core and a second stator core that face the magnet 2 and are arranged vertically in the axial direction. Reference numerals 5a and 5b denote a first tooth and a second tooth for projecting from the first stator core 4a and the second stator core 4b, respectively, for winding coils. As shown in detail in FIG. 1C, the first stator core 4a and the second stator core 4b are formed of a plurality of first teeth 5a provided on the first stator core 4a. A plurality of second teeth 5b provided on the second stator iron core 4b are fixedly installed therebetween. A first coil 6a is wound around the first tooth 5a, and a second coil 6b is wound around the second tooth 5b.

When the flywheel 1 fastened to the crankshaft 3 rotates, an electromotive force is generated in the first and second coils 6a and 6b wound around the first and second stator cores 4a and 4b, respectively. Electric power is supplied to the outside through lead wires 7 connected to the coils 6a and 6b.
The first stator core 4a is disposed near a terminal (not shown) for connecting the coil lead wire 7 to the outside, and the second stator core 4b is disposed far from the terminal.

FIG. 2 is a diagram for explaining an example of the arrangement of the first and second stator teeth 5a and 5b and the coils 6a and 6b wound around the teeth. When the two teeth 5a and 5b are arranged so as to overlap in the axial direction as shown in FIG. 2, interference between the coils occurs, and in order to avoid this, the distance d between the two has to be kept open. For this reason, there exists a problem that the length of an axial direction will become large.
On the other hand, in the embodiment shown in FIG. 1, the first coil 6a wound around the first stator core 4a and the second coil 6b wound around the second stator core 4b are in the axial direction. Since they do not overlap, mutual interference can be avoided. For this reason, the stator can be arranged in the axial direction with almost no space therebetween, so that the axial length can be shortened and the space can be saved.
In addition, if the first stator and the second stator are integrated and configured continuously without any interval, they can be attached together as compared to the case where they are arranged independently. The cost can be reduced by reducing the number of parts and man-hours.

Embodiment 2. FIG.
FIG. 3 shows a stator of a magnet generator according to Embodiment 2 of the present invention. FIG. 3A is a plan view similar to FIG. 1A, but shows only the parts necessary for the description. FIG. 3B is an explanatory view showing a CC cross section of FIG.
The number of first teeth 5a provided in the first stator core 4a is configured to be smaller than the number of second teeth 5b provided in the second stator core 4b. The lead wire 7 connected to the second coil 6b is arranged in the space S thus formed.
According to the embodiment shown in FIG. 3, it is possible to easily install the lead wire 7 that supplies the power generated in the second coil 6 b arranged far from the terminal of the coil lead wire to the outside.

Embodiment 3 FIG.
FIG. 4 shows a magnet generator according to Embodiment 3 of the present invention. FIG. 4A is a plan view similar to FIG. 1A, but shows only the parts necessary for the description. FIG. 4B is an explanatory view showing the DD cross section of FIG. 4A, and FIG. 4C is an explanatory view showing the EE cross section of FIG. 4A.
In the flywheel 1, first and second magnets 2a and 2b facing the first and second stator cores 4a and 4b, respectively, are arranged in two rows in the rotation axis direction. The first magnet 2a and the second magnet 2b are shifted by the same angle as the shift in the rotational direction of the first teeth 5a and the second teeth 5b provided in the stator cores 4a and 4b, respectively. Yes.

The embodiment shown in FIG. 4 will be described below with reference to FIG. 5 for explaining the positional relationship between each tooth and the magnet and FIG. 6 for showing the output voltage waveform of each system of the magnet generator.
FIG. 5A shows an example in which the first magnet 2a and the second magnet 2b are arranged to coincide with each other in the rotation direction. In the arrangement as shown in FIG. 5 (a), as shown in FIG. 6 (a), the phases of the U1 phase and the U2 phase are shifted, and the coil output end of the first stator core and the second stator. When the coil output ends of the iron core are coupled, a voltage drop is caused.
On the other hand, as shown in FIG. 5B, the first magnet 2a and the second magnet 2b are arranged in the rotational direction of the first teeth 5a and the second teeth 5b provided in the stator cores 4a and 4b, respectively. Since it is shifted by the same angle as the shift, the positional relationship between the U ₁ ^# phase, V ₁ ^# phase, W ₁ ^# phase of the first coil 6a and the first magnet 2a, and the second coil 6b The U ₂ ^# phase, V ₂ ^# phase, W ₂ ^# phase and the second magnet 2b have the same positional relationship, and are generated in the U ₁ ^# phase and the U ₂ ^# phase as shown in FIG. 6B. Voltage to be in phase. For this reason, even when the coil output end of the first stator core and the coil output end of the second stator core are coupled, the output can be performed without voltage drop.
In the embodiment shown in FIG. 4, the number of magnetic poles is 2n with respect to the number of teeth 3n of the stator. However, when the relationship between the number of teeth and the number of magnetic poles is different, for example, with respect to the number of teeth 3n, Even in the case of Equation 4n, the same effect is obtained.

Embodiment 4 FIG.
FIG. 7 shows a magnet generator according to Embodiment 4 of the present invention. FIG. 7A is a plan view similar to FIG. 1A, but shows only the portions necessary for the description. FIG.7 (b) is explanatory drawing which shows the FF cross section of Fig.7 (a).
The first teeth 9a provided on the first stator core 8a and the second teeth 9b provided on the second stator core 8b are the rotation directions of the teeth on the side where the stator cores face each other. The width of is smaller.
The embodiment shown in FIG. 7 will be described with reference to FIG.
FIG. 8B shows an example of the teeth 13a and 13b having the same tooth width B and a constant width in the rotation direction. In this case, since the intervals between the teeth are narrow, the winding width a of the coils wound around the teeth 13a and 13b cannot be increased.
On the other hand, in the embodiment of FIG. 7, as shown in FIG. 8 (a), the space between the coils 12a and 12b wound around the teeth 11a and 11b can be afforded, as shown in FIG. 8 (b). The number of turns can be increased or the wire diameter can be increased as compared with the coils 14a and 14b wound around the teeth 13a and 13b having the same tooth width B and a constant width in the rotation direction.

As described above, application of the present invention eliminates interference of the coils wound around the first and second stator cores, so that the axial length of the magnet generator can be shortened, space reduction, The effect of reducing the burden on the crankshaft can be obtained.
Furthermore, by arranging magnets respectively corresponding to the first and second stator cores, the voltage generated in the coil wound around the first stator core and the coil wound around the second stator core is increased. Even when the output end of the first stator core and the output end of the second stator core are coupled to each other, electric power can be supplied to the outside without reducing the output voltage.
Furthermore, by reducing the width in the rotation direction of the teeth on the side where the first stator core and the second stator core face each other, the space between the coils wound around the first and second stator cores is reduced. There is room, increasing the number of turns or increasing the wire diameter.

1 is a diagram showing a magnet generator according to Embodiment 1 of the present invention. FIG. It is a figure explaining the relationship between a tooth and a coil at the time of arranging two rows of stators. It is a figure which shows the stator of the magnet generator in Embodiment 2 of this invention. It is a figure which shows the magnet generator in Embodiment 3 of this invention. It is a figure which shows the positional relationship figure of the teeth and magnet of the magnet generator in Embodiment 3 of this invention. It is a figure which shows the output voltage waveform of each system | strain of the magnet generator in Embodiment 3 of this invention. It is a figure which shows the stator of the magnet generator in Embodiment 4 of this invention. It is a figure which shows the comparison of the winding width by the teeth shape of the magnet generator in Embodiment 4 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Flywheel, 2 magnets, 2a 1st magnet, 2b 2nd magnet, 3 Crankshaft, 4a, 8a 1st stator core, 4b, 8b 2nd stator core, 5a, 9a, 11a, 13a First teeth, 5b, 9b, 11b, 13b Second teeth, 6a, 10a, 12a, 14a First coil, 6b, 10b, 12b, 14b Second coil, 7 Current lead line.

Claims (7)

  A plurality of flywheels having a cylindrical portion and rotating around a rotation axis; a plurality of magnets arranged on an inner periphery of the cylindrical portion and rotating together with the flywheel; and a plurality of teeth projecting to the outer periphery. In the magnet generator including the first stator core and the second stator core facing the magnets, and the power generation coil wound around each of the teeth, the first stator core and the second stator core The core is arranged in a layered manner in the direction of the rotation axis, and the teeth provided on the first stator core and the teeth provided on the second stator core are arranged so as to be shifted with respect to the rotation direction. Magnet generator to play.   The magnet generator according to claim 1, wherein the teeth provided in the second stator core are arranged so as to be between the teeth provided in the first stator core.   The magnet generator according to claim 2, wherein the first stator core and the second stator core are integrally formed continuously in the layer direction.   The magnet generator according to claim 1, wherein the number of teeth provided in the second stator core is smaller than the number of teeth provided in the first stator core.   The plurality of magnets arranged on the inner periphery of the flywheel are arranged in two rows in the direction of the rotation axis so as to face the teeth provided on the first stator core and the second stator core. The magnet generator according to claim 1.   The plurality of magnets arranged on the inner periphery of the flywheel are arranged in two rows in the direction of the rotation axis so as to face the teeth provided in the first stator core and the second stator core, The first magnet and the second magnet are disposed so as to be shifted by the same angle as the shift in the rotation direction of the first teeth and the second teeth provided on the stator core, respectively. Item 6. The magnet generator according to Item 5.   The magnet power generation according to any one of claims 1 to 6, wherein a width in a rotation direction of teeth on a side where the first stator core and the second stator core face each other is reduced. Machine.

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