WO2015182467A1

WO2015182467A1 - Generator for two-wheeled motor vehicle

Info

Publication number: WO2015182467A1
Application number: PCT/JP2015/064559
Authority: WO
Inventors: 鉄也刑部
Original assignee: スズキ株式会社
Priority date: 2014-05-30
Filing date: 2015-05-21
Publication date: 2015-12-03
Also published as: CN105556811A; JP6349972B2; CN105556811B; JP2015226442A

Abstract

A generator for a two-wheeled motor vehicle is disposed within the power unit of the vehicle and has: a stator configured by winding stator coils around stator teeth, respectively, the stator teeth extending radially from the center; and a rotor configured by arranging magnets on the inner peripheral surface of a rotor yoke and rotating about the center, i.e., around the stator. The generator for a two-wheeled motor vehicle is configured in such a manner that: the magnets are arranged in the circumferential direction of the rotor so as to be adjacent to each other with gaps therebetween; the stator teeth are formed by stacking core sheets on each other, the core sheets being thin sheets of steel; the stator teeth each have tip sections extending in the rotational direction of the rotor and in the direction opposite the rotational direction, from the coil-wound section of the stator tooth, the coil-wound section being that around which the stator coil is wound; and when the leading end of a magnet in the rotational direction substantially coincides with the centerline of the coil-wound section, one of the tip sections of each of the stator teeth, said tip section extending in the rotational direction of the rotor, overlaps the preceding magnet adjacent to the leading end of the magnet in the rotational direction.

Description

Generator for motorcycle

The present invention relates to a generator for a motorcycle in which electric loss is reduced and power generation output and power generation efficiency are improved.

As a generator for a motorcycle, there is one using a magneto generator 100 as shown in FIG. The magneto generator 100 includes a stator 103 in which a stator (power generation) coil 102 is wound around each of a plurality of stator teeth 101, and a rotor 106 in which a magnet 105 is installed on an inner peripheral surface of a rotor yoke 104. The rotor 106 generates electric power by inducing an induced current in the power generation coil 102 due to electromagnetic induction generated by rotating around the stator 103 by the driving force of the engine.

In the magneto generator 100, for example, four magnets 105 are installed on the inner peripheral surface of the rotor yoke 104. As shown in FIG. 23, each magnet 105 is magnetized with three magnetic poles forming a pair of N and S poles. For this reason, the magnetic flux easily leaks to the adjacent magnetic pole in one magnet 105, the magnetic flux flowing to the stator teeth 101 of the stator 103 is reduced, and the magnetic flux is not used effectively. As a result, the power generation output and power generation efficiency of the magneto generator 100 could not be improved.

Also, a rotating electrical machine is disclosed in which a plurality of permanent magnets are arranged on the rotor yoke of the rotor that rotates on the outer periphery of the stator with the auxiliary poles interposed therebetween, and functions as a generator (see, for example, Patent Document 1).

Further, a thyristor is provided as a rectifier that rectifies the output of the stator coil by arranging a stator coil composed of a three-phase winding in a vibration damping generator for a vehicle and connecting the stator coil to a battery via a rectifier (rectifier). A technique using a rectifier is also disclosed. (For example, refer to Patent Document 2).

JP 2002-153095 A JP 2002-95214 A

In the rotating electrical machine described in Patent Document 1, since the supplementary poles are arranged between the permanent magnets of the rotor, magnetic flux leaks between the permanent magnets and the supplementary poles, and the stator permanent magnet of the stator The magnetic flux flowing to the teeth (stator salient poles) will decrease. Therefore, in this case as well, the magnetic flux of the permanent magnet is not used effectively, and the power generation output and power generation efficiency may be reduced.

In addition, the technique described in Patent Document 2 described above only includes a thyristor provided in the rectifier to control the output of the stator coil, thereby reducing the electrical loss of the generator and reducing the total rotation of the engine. There is no description that suggests or suggests a technique for reducing the output loss in the region.

An object of the present invention is made in consideration of the above-described circumstances, and is provided in a power unit of a motorcycle and effectively guides magnetic flux from a magnet of a rotor to stator teeth of a stator, thereby generating power and generating power. An object is to provide a generator for a motorcycle that can improve efficiency.

Another object of the present invention is to provide a generator for a motorcycle that can reduce the electric loss of the generator, reduce the output loss of the entire engine rotation range, and improve the fuel efficiency of the vehicle.

A generator for a motorcycle according to an embodiment of the present invention provided to achieve the above object includes: a stator having a stator coil wound around each of a plurality of stator teeth extending radially from the center; A generator for a motorcycle, provided in a power unit of a motorcycle, having a magnet installed on an inner peripheral surface of a rotor yoke and rotating around the stator about the center, wherein the magnet is A plurality of coils are installed adjacent to each other with a gap in the circumferential direction of the rotor, and the stator teeth are formed by stacking a plurality of core sheets of thin steel plates, and the coil winding around which the stator coils are wound A front end portion of the stator teeth extending from the mounting portion toward the rotation direction side and the counter rotation direction side of the rotor, and extending toward the rotation direction side of the rotor. Rectangular side portion, when the rotation direction front end of the magnet is substantially aligned with the center line of the coil winding portion, characterized in that it is configured to overlap the preceding magnet adjacent to the rotation direction front end side.

In the above-described embodiment, it is desirable that the tip of the stator teeth is formed such that one side portion extending in the rotation direction side of the rotor is longer than the other side portion extending in the counter rotation direction side of the rotor.

In addition, a motorcycle generator according to another embodiment of the present invention provided to achieve the above object is provided with a stator coil wound around each of a plurality of stator teeth extending radially from the center. A generator for a motorcycle, provided in a power unit of a motorcycle, having a stator and a rotor installed around the stator and having a magnet installed on an inner peripheral surface of the rotor yoke, and rotating around the stator, A plurality of magnets are installed adjacent to each other with a gap in the circumferential direction of the rotor, the stator teeth are configured by laminating a plurality of thin steel plate core sheets, and the stator coil is wound thereon. A leading end portion extending from the coil winding portion to the rotation direction side and the counter-rotation direction side of the rotor. When matched, the row magnet rotating forward end after adjacent the rotation direction rear side, so as not to overlap with the tip of the stator teeth, wherein the gap is set between the magnet.

In the above embodiment, when the front end in the rotational direction of the trailing magnet substantially coincides with the center line of the coil winding portion in the stator teeth, the one side portion extending in the rotational direction of the rotor in the stator teeth is the rear portion. It is desirable to be configured to overlap with the magnet adjacent to the front end side in the rotation direction of the row magnet.

In both the above embodiments, it is desirable that the ratio of the circumferential angle between the magnet provided in the rotor and the gap between the magnets is 7/3: 1.

Further, it is desirable that a plurality of magnets provided in the rotor are installed corresponding to 1: 1 on a plurality of stator teeth of the stator.

Further, it is preferable that 12 stator teeth of the stator and 12 magnets of the rotor are provided along the circumferential direction.

Further, it is preferable that a metal cover having an opening exposing a part of the magnet is attached to the inner peripheral surface of the rotor magnet.

Further, the stator teeth are preferably configured by laminating a plurality of rolled steel plates or electromagnetic steel plates made of a core sheet of a thin steel plate having a thickness of less than 1 mm.

Also, it is desirable that the stator teeth are provided with an assembly through-hole that penetrates a plurality of laminated thin steel sheet core sheets.

Furthermore, a motorcycle generator according to still another embodiment of the present invention provided to achieve the above object is provided with a stator coil wound around each of a plurality of stator teeth extending radially from the center. A generator for a motorcycle, provided in a power unit of a motorcycle, having a stator and a rotor installed around the stator and having a magnet installed on an inner peripheral surface of the rotor yoke, and rotating around the stator, A plurality of magnets are installed adjacent to each other via a gap in the circumferential direction of the rotor, and the stator teeth are arranged on the rotor rotation direction side and the counter rotation direction side from the coil winding portion around which the stator coil is wound. The stator coil is connected to a thyristor via a regulator / actuator (regulator rectifier). The retreater / actuator is connected to a battery, and the gate of the thyristor is connected to a voltage control circuit. The voltage control circuit turns off the thyristor when the charging voltage of the battery reaches a predetermined voltage. Thus, the reregulator / actuator is controlled open.

In the above embodiment, the stator teeth of the stator may be formed by laminating a plurality of rolled steel sheets or electromagnetic steel sheets made of a thin steel sheet core sheet having a thickness of 0.2 mm to less than 1 mm.

Further, the stator teeth are configured by laminating a plurality of rolled steel plates made of a core sheet of a thin steel plate having a thickness of less than 1 mm, and each of the rolled steel plates is coated with an insulating resin material, or one rolled steel plate is provided. The stator teeth may be configured by sandwiching a paper or resin insulating sheet between one sheet or applying an insulating paint.

Furthermore, it is desirable that the stator teeth are made of a thin steel plate core sheet having a thickness of less than 1 mm made of an electromagnetic steel plate.

Furthermore, it is desirable that the electromagnetic steel plate of the stator teeth is a non-oriented electrical steel plate.

According to the generator for a motorcycle of the present invention, the generator is provided in the power unit of the motorcycle, and a plurality of magnets are installed adjacent to each other with a gap in the circumferential direction of the rotor. Leakage of magnetic flux between the magnets can be suppressed, and the magnetic flux flowing from the magnets to the stator teeth can be increased. As a result, since the magnetic flux from the magnet of the rotor can be effectively guided to the stator teeth of the stator, the power generation output and the power generation efficiency can be improved.

Further, according to the present invention, the one end portion of the stator teeth leading end portion extending in the rotor rotating direction side at the stator tooth leading end portion is substantially coincident with the center line of the coil winding portion of the stator teeth. Then, it is configured to overlap with the preceding magnet adjacent to the front end in the rotational direction. Therefore, the time for the magnets and the stator teeth to face each other, that is, the time for the stator teeth to collect the magnetic flux of the magnets becomes longer, and the magnetic flux flows through each stator tooth for a long time. As a result, since the magnetic flux from the magnet of the rotor can be effectively guided to the stator teeth of the stator, the power generation output and the power generation efficiency can be improved.

Further, according to the present invention, the stator coil of the generator for a motorcycle is connected to the battery via a regulated rectifier (regulator / rectifier) having a rectifying function controlled by a thyristor, and the charging voltage of the battery is When the voltage reaches the specified voltage, the voltage control circuit controls the thyristor to OFF and the regulator rectifier is controlled to open, so when the battery voltage reaches the specified voltage, no current flows through the stator coil, reducing copper loss. The electric loss can be reduced, and the electric loss can be reduced in the entire rotation region of the engine, so that the fuel efficiency of the vehicle can be improved.

Further features and operational effects of the present invention will become clearer from the following description that will be described with reference to the accompanying drawings.

The left side view showing the engine unit of the motorcycle to which one embodiment of the generator for motorcycles concerning the present invention was applied. Sectional drawing which follows the II-II line | wire of FIG. The front view which shows the magneto generator as a generator visually observed from the III-III line direction of FIG. The schematic front view which shows typically the magnet and stator teeth of FIG. The operation | movement figure which expands a part of FIG. 3 and shows the flow of the magnetic flux in the 1st rotation position of a magnet and stator teeth. The operation | movement figure which expands a part of FIG. 3 and shows the flow of the magnetic flux in the 2nd rotation position of a magnet and stator teeth. The operation | movement figure which expands a part of FIG. 3 and shows the flow of the magnetic flux in the 3rd rotation position of a magnet and stator teeth. The graph which shows the relationship between the gap | interval between magnets, a power generation output, power generation efficiency, etc. FIG. The graph which shows the relationship between the relative length with respect to the other side part of the one side part in the front-end | tip part of stator teeth, a power generation output, power generation efficiency, etc. FIG. The operation | movement figure corresponding to FIG. 6 which shows the case where the other side part in the front-end | tip part of stator teeth is lengthened with respect to the one side part. The graph which shows the relationship between the relative length with respect to the one side part of the other side part in the front-end | tip part of stator teeth, and a power generation output, power generation efficiency, etc. The sectional side view which shows 2nd Embodiment of the generator for motorcycles. The fragmentary sectional view which shows the magneto generator of the generator for motorcycles. FIG. 3 is a side view showing a rotor cover that covers the rotor of the magneto generator from the magnet side. FIG. 14B is a cross-sectional view taken along the line XIVB-XIVB in FIG. 14A. FIG. 13 is a power generation circuit diagram showing a three-phase short regulator rectifier (regulator / rectifier) combined with the magneto generator shown in FIG. 12. FIG. 13 is a power generation circuit diagram showing a three-phase open regulated rectifier combined with the magneto generator shown in FIG. 12. FIG. 17 is a configuration diagram showing a voltage control circuit provided in the regulate rectifier shown in FIGS. 15 and 16. The figure which shows the electrical loss reduction effect by the magneto generator which combined the short type or the open type regulated rectifier. The figure which shows the electrical loss by the magneto generator according to stator specification, and its reduction effect. These are the fragmentary sectional views which show the laminated structural example of the core sheet | seat of the stator teeth which comprises a magneto generator. FIG. 20 is an enlarged view showing an I part in FIG. 20A. FIG. 4 is a power generation circuit diagram showing a single-phase full charge generator combined with a magneto generator. FIG. 3 is a power generation circuit diagram showing a single-phase AC-DC generator combined with a magneto generator. The front view which shows the magneto apparatus as a conventional generator. The schematic front view which shows the magnet of FIG. 22 typically.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a left side view showing a power unit of a motorcycle to which a first embodiment of a motorcycle generator according to the present invention is applied. In FIG. 1, a power unit 10 is an air-cooled four-cycle single-cylinder engine. The engine 11 mainly includes a crankcase 12 that rotatably supports and accommodates a crankshaft 19, a cylinder block 13 that is coupled to an end of the crankcase 12, and a cylinder block 13 that is coupled to the cylinder block 13. A cylinder head 14 and a head cover 15 coupled to the cylinder head 14 are provided. The generator for a motorcycle according to the present invention is provided in the power unit of the motorcycle.

In the present embodiment, the crankcase 12 is divided into left and right parts. In FIG. 2, the crankcase 12 is formed by connecting a right crankcase 12 R and a left crankcase 12 L, which are paired on the left and right sides, and integrated with each other. A crankshaft 19 and a pair of left and right crank webs 19 A integrated with the crankshaft 19 are rotatably supported in the crank chamber 18 via a pair of bearings 20.

The base end side of the connecting rod 22 is connected between the crank webs 19A via the crank pins 21. Further, a piston 23 is accommodated in the cylinder block 13 so as to be able to reciprocate, and the piston 23 is connected to the distal end side of the connecting rod 22 via a piston pin 24. Accordingly, the crankshaft 19 rotates as the piston 23 reciprocates in the axial direction of the cylinder block 13.

Around the crank chamber 18, a clutch chamber 27 is arranged on the right side and a magnet chamber 28 is arranged on the left side of the case partition wall. A clutch device 29 disposed at the right shaft end of the crankshaft 19 is accommodated in the clutch chamber 27, and the clutch chamber 27 is covered with a clutch cover 30. On the other hand, a magneto device 31 disposed at the left shaft end of the crankshaft 19 is accommodated in the magneto chamber 28, and the magneto chamber 28 is covered with a magnet cover 32 (crankcase cover).

The magneto device 31 is a single-phase or three-phase magneto alternator for a motorcycle. The magneto device 31 is coaxial with the rotation shaft of the crankshaft 19 and is arranged around the crankshaft 19 and on the left side of the crankshaft 19. The rotor 34 is fixed to the shaft end and rotates around the stator 33 coaxially with the rotation shaft of the crankshaft 19. The direction of rotation of the rotor 34 is indicated by an arrow P in FIG.

As shown in FIGS. 2 and 3, the stator 33 has a plurality of (12 in the present embodiment) stator teeth 35 radially (from the center O (coaxial with the rotation center axis of the crankshaft 19)). The stator coils 37 are wound around the coil winding portions 36 of the respective stator teeth 35. As shown in FIGS. 3 to 5 which are views seen from the direction of the rotation axis of the crankshaft 19, both ends of the stator 33 in the circumferential direction of the stator 33 (rotation direction of the rotor 34) The tip portion 38 is formed extending to the side and the counter-rotating direction side of the rotor 34. As shown in FIG. 2, the stator 33 is attached and fixed to the inner surface of the magnet cover 32 using attachment bolts 39.

The rotor 34 is formed in a bottomed cylindrical shape as shown in FIGS. 2 and 3, and the stator 33 is disposed in the internal space thereof. Further, a plurality of magnets 41 are fixedly installed on the inner peripheral surface of the rotor yoke 40 so as to surround the stator 33, and the magnets 41 are arranged so as to face the tip end portions 38 of the stator teeth 35 in the stator 33. When the rotor yoke 40 is attached to the crankshaft 19 so as to rotate together with the crankshaft 19, the magnet 41 passes through the outside of the front end portion 38 of the stator tooth 35 with an appropriate gap. Composed. As shown in FIGS. 3 to 5, a plurality of (for example, twelve) magnets 41 (12 in this embodiment) correspond to a plurality of (for example, twelve) stator teeth 35 via a gap 42 where no magnet is present. Installed next to each other. And it arrange | positions so that the pole of the adjacent magnet 41 may be alternated while being magnetized by one magnet 41 by one pole.

The rotor 34 having a plurality of magnets 41 rotates around the stator 33 in the direction of the arrow P around the center O of the stator 33 by the rotation of the crankshaft 19, so that the stator coil 37 of the stator 33 is moved by electromagnetic induction. An induced current is induced to generate power. 5 to 7 indicate the magnetic flux flowing from the magnet 41 to the stator 35, or the flow of magnetic flux flowing from the stator 35 to the magnet 41. The plurality of magnets 41 of the rotor 34 are protected by mounting a rotor cover 43 made of a thin metal plate on the side opposite to the rotor yoke 40 (side on which the stator 33 is disposed). 2 and 3, reference numeral 48 denotes an ignition timing signal generating coil, and reference numeral 49 denotes a protrusion provided on the outer peripheral side of the rotor yoke 40.

As shown in FIG. 6, the gap 42 between the plurality of magnets 41 is a view seen from the direction of the rotation axis of the crankshaft 19. 35 at a second rotational position substantially coincident with the center line N of the coil winding part 36 (a virtual line connecting the center of the rotation axis and the center of the coil winding part 36 in the cross section perpendicular to the rotation axis of the crankshaft 19). When the rotation direction rear end 44B (having the rotation direction front end 44A opposed thereto) is adjacent to the rotation direction front end 44A of the succeeding magnet 41, the front end portion 38 of the stator tooth 35 (the other side portion of the front end portion 38 described later). 38B) is set so as not to overlap. That is, when the rear end 44 B in the rotation direction of the magnet 41 comes to the second rotation position substantially coincident with the center line N of the coil winding portion 36 in the cross section perpendicular to the rotation axis of the crankshaft 19, the succeeding succeeding magnet 41. The front end 44 A in the rotational direction is set so as not to overlap with the front end portion 38 of the stator tooth 35 (the angular position differs in the circumferential position). The stator teeth 35 are configured by laminating a plurality (12 in this embodiment) of core sheets of thin steel plates having a thickness of 1 mm or less, preferably less than 1 mm.

In the present embodiment, the generator for the motorcycle is provided in the power unit of the motorcycle, and as shown in FIG. 4, which is viewed from the direction of the rotation axis of the crankshaft 19, the circumferential angle of the magnet 41 (the magnet 41 Is the circumferential angle of the gap 42 between the magnets 41 (on both sides of the gap 42), where θa is the maximum included angle between the straight edges connecting the both end edges 44A, 44B and the rotation axis center of the crankshaft 19. Θa = 21 ° and θb = 9 °, respectively, where θb is the maximum included angle between the straight edges connecting the end edges 44A, 44B of the magnet 41 and the rotation shaft center of the crankshaft 19). Is done. That is, the ratio between the circumferential angle at which the magnet 41 is disposed and the circumferential angle at which the gap 42 between the magnets 41 is disposed is
θa: θb = 21: 9 = 7/3: 1
Set to

The reason why the circumferential angle θb of the gap 42 between the magnets 41 is set to 9 ° will be described with reference to FIG. In FIG. 8, the mechanical input (the load for turning the generator, which in this case is a load acting on the engine 11. This load is divided into a power generation output and an electric loss. The power generation output (generated power generated by the magneto device 31) is indicated by Y1, and the power generation efficiency (ratio obtained by dividing the power generation output by the machine input) is indicated by Z1. ing. Since one pole is magnetized in one magnet 41 and the gap 42 is provided between the magnets 41, leakage of magnetic flux between the magnets 41 is suppressed, and the magnetic flux flowing from the magnet 41 to the stator teeth 35 increases. The power generation output and power generation efficiency, particularly power generation efficiency are improved. As shown in FIG. 8, since the power generation efficiency Z1 is highest when the circumferential angle θb of the gap 42 is 9 °, the circumferential angle θb is set to 9 °.

As shown in FIGS. 4 and 5, the tip end portion 38 of each stator tooth 35 of the stator 33 has a circumferential length L of the one side portion 38 A extending in the rotation direction P of the rotor 34 (perpendicular to the rotation axis of the crankshaft 19). In a simple cross section, the protrusion height of the coil winding portion 36 with respect to the center line N) extends in the opposite direction to the rotation direction P of the rotor 34 (extends toward the rotation direction P). (In the cross section perpendicular to the rotation axis of the crankshaft 19), the coil winding portion 36 is formed longer than the center line N. That is, L = M + α.

At this time, the circumferential length M of the other side portion 38B at the tip 38 of the stator teeth 35 is such that the circumferential center position K of the magnet 41 is the center line N of the coil winding portion 36 of the stator teeth 35 as the rotor 34 rotates. When the first rotational position (FIG. 5) is reached, the other side of the tip portion 38 of the stator tooth 35 is substantially coincident with (a circumferential position with respect to the rotation axis center of the crankshaft 19 and substantially the same angular position). The edge 46 of the portion 38B is set to a length that substantially coincides with the rotation direction rear end 44B of the magnet 41 (a circumferential position with respect to the rotation axis center of the crankshaft 19 and substantially the same angular position). . Further, in the present embodiment, as described above, the circumferential length M of the other side portion 38B at the tip portion 38 of the stator teeth 35 is set to a length that substantially matches the circumferential length of the gap 42.

On the other hand, as shown in FIG. 7, in one side portion 38 A of the tip portion 38 of the stator tooth 35, the front end 44 A of the rotation direction of the magnet 41 is rotated by the rotation of the rotor 34. Is substantially coincident with the center line N of the rotation axis when it reaches the third rotation position (which is a circumferential position with respect to the rotation axis center of the crankshaft 19 and has substantially the same angular position). A circumferential length L (with a rear end 44B in the direction) adjacent to the adjacent leading magnet 41 (the magnet 41 moving away from the stator teeth 35) at a circumferential position with respect to the rotation shaft center of the crankshaft 19. 4) is set. By setting the circumferential length L of the one side portion 38A at the tip portion 38 of the stator tooth 35 as described above, the time during which the magnet 41 and the tip portion 38 of the stator tooth 35 face each other, in particular, the rotation of the magnet 41. When the rear end 44B of the direction passes through the outside of the front end portion 38 of the stator teeth 35 and then moves away, the facing time becomes longer, and the time for the stator teeth 35 to recover the magnetic flux from the magnet 41 becomes longer. Therefore, since the magnetic flux from the magnet 41 can be effectively passed through the stator teeth 35 for a long time, the power generation output and power generation efficiency of the magneto device 31 are improved.

The circumferential length L of the one side portion 38A at the distal end portion 38 of the stator teeth 35 is set to be longer by 3.0 mm (corresponding to the above α) than the circumferential length M of the other side portion 38B at the distal end portion 38. It is preferable. The reason will be described with reference to FIG. In FIG. 9, the machine input is indicated by X2, the power generation output is indicated by Y2, and the power generation efficiency is indicated by Z2. The relative length of the one side portion 38A with respect to the other side portion 38B in the tip portion 38 of the stator teeth 35 (the length of the one side portion 38A with respect to the other side portion 38B) is such that the power generation efficiency Z2 increases as the one side portion 38A increases. It is found that the height is increased, and it is optimal to increase the length by about +3.0 mm. That is, when the third rotation position shown in FIG. 7 is reached, if the one side portion 38A of the front end portion 38 of the stator teeth 35 and the rear end 44B in the rotation direction of the magnet 41 overlap with each other by about 3.0 mm, the power generation efficiency Z2 Is optimal.

As shown in FIG. 10, the circumferential center position K of the magnet 41 of the rotor 34 is substantially the same as the central axis N of the coil winding portion 36 of the stator tooth 35. When the coinciding first rotational position (see FIG. 5) is reached, the edge 45 of the one side portion 38A of the stator teeth tip 38 has a circumferential length L that substantially coincides with the rotation direction front end 44A of the magnet 41, and Even if the circumferential length M of the other side portion 38B at the tip 38 of the stator teeth 35 is set longer or shorter than the circumferential length L of the one side portion 38A (in FIG. It does not contribute to the improvement of power generation efficiency.

For example, when the relative length with respect to the one side portion 38 of the other side portion 38B at the front end portion 38 of the stator teeth 35 (the length of the other side portion 38B with respect to the one side portion 38A) is long as shown in FIG. When the rotor 34 rotates and the rear end 44B of the magnet 41 in the rotational direction substantially coincides with the center line N of the coil winding portion 36 of the stator teeth 35, the magnetic flux from the magnet 41 flows to the stator teeth 35 as indicated by the arrow Aa. At the same time, it passes through the other side portion 38B of the tip 38 of the stator teeth 35 and leaks to the adjacent magnet 41 as shown by the arrow Ba. In addition, when the relative length of the other side portion 38 B with respect to the one side portion 38 at the front end portion 38 of the stator teeth 35 is short, the timing at which the magnetic flux from the magnet 41 flows into the stator teeth 35 when the rotor 34 rotates is delayed. End up.

Therefore, as shown in FIG. 11 in which the machine input is indicated by X3, the power generation output is indicated by Y3, and the power generation efficiency is indicated by Z3, the relative length of the other side portion 38B with respect to the one side portion 38A at the tip portion 38 of the stator teeth 35 is shown. Is too long (for example, when the other side portion 38B is as long as +2 mm with respect to the one side portion 38A) or short (for example, when the other side portion 38B is as short as -3 mm with respect to the one side portion 38A) In addition, it can be seen that the power generation efficiency Z3 is decreased.

From the above, the circumferential length M of the other side portion 38B at the tip 38 of the stator teeth 35 is such that the circumferential center position K of the magnet 41 is rotated by the rotation of the rotor 34 as shown in FIGS. When the first rotational position approximately coincident with the center line N of the coil winding portion 36 of the tooth 35 is reached (FIG. 5), the end edge 46 of the other side portion 38B of the tip portion 38 of the stator tooth 35 is in the rotational direction of the magnet 41. It is optimal in terms of power generation efficiency to be set to a length that substantially matches the rear end 44B. Further, when the end edge 46 of the other side portion 38B at the tip end portion 38 of the stator teeth 35 is set to a length that substantially coincides with the rotation direction front end 44A when the second rotation position shown in FIG. Can be improved.

[Effect of the first embodiment]
According to the present embodiment, as shown in FIGS. 3 and 5, a plurality of magnets 41 included in the rotor 34 are installed adjacent to each other at regular intervals via the gap 42 in the circumferential direction of the rotor 34. The leakage of magnetic flux between the magnets 41 can be suppressed, and the magnetic flux flowing from the magnet 41 to the stator teeth 35 of the stator 33 can be increased. As a result, since the magnetic flux from the magnet 41 of the rotor 34 can be effectively guided to the stator teeth 35 of the stator 33, the power generation output and power generation efficiency of the magneto device 31 can be improved.

As shown in FIG. 7, one side portion 38 A that extends in the rotation direction P side of the rotor 34 at the tip portion 38 of the stator tooth 35 of the stator 33 is arranged on the center line N of the coil winding portion 36 of the stator tooth 35. When the rotation direction front end 44A substantially coincides with the rotation direction front end 44A, the rotation direction front end 44A is configured to overlap the adjacent magnet 41 having the rotation direction rear end 44B. Therefore, the time for the magnet 41 and the stator teeth 35 to face each other, that is, the time for the stator teeth 35 to collect the magnetic flux of the magnet 41 becomes longer, and the magnetic flux flows through each stator tooth 35 for a long time. As a result, since the magnetic flux from the magnet 41 of the rotor 34 can be effectively guided to the stator teeth 35 of the stator 33, the power generation output and power generation efficiency of the magneto device 31 can be improved.

[Second Embodiment]
Next, a second embodiment of the motorcycle generator according to the present invention will be described with reference to FIGS.

The motorcycle generator according to the second embodiment is provided in the power unit of the motorcycle according to the first embodiment, and is shown in FIG. 1 to FIG. 3 shown in the motorcycle generator in the first embodiment. Since the configuration of the magneto device 31 is the same, the same components are denoted by the same reference numerals, and redundant description is omitted or simplified.

The motorcycle generator according to the second embodiment has a single-phase or three-phase magneto alternator 31A as a magneto device. As shown in FIG. 12, the magneto generator 31 A is coaxial with the crankshaft 19, and rotates around the stator 33 integrally with the rotation shaft of the crankshaft 19 around the stator 33. And a rotor 34. The rotor 34 is fixed to the left shaft end of the crankshaft 19, and the rotation direction of the rotor 34 is indicated by an arrow P in FIG.

As shown in FIGS. 3, 12, and 13, the stator 33 includes a plurality of stator teeth 35 (12 in the second embodiment) from the center O (coaxial with the rotation center axis of the crankshaft 19). A stator coil 37 is wound around the coil winding portion 36 of each stator tooth 35 as a power generating coil. On the front end side of the coil winding portion 36 of each stator tooth 35, a tip portion 38 is formed extending on both sides in the circumferential direction of the stator 33 (rotation direction side and counter-rotation direction side of the rotor 34). Tip 38 of the stator teeth 35 the length L ₁ of the one side portion extending in the rotational direction of the rotor 34 is formed longer than the length M ₁ of the other side portion extending in the counter-rotational direction of the rotor 34. For example, L ₁ = M ₁ + β (where β is an integer). As shown in FIG. 12, the stator 33 is fixedly attached to the inner surface of the magnet cover 32 using mounting bolts 39.

Further, as shown in FIGS. 3, 12, and 13, the rotor 34 is formed in a bottomed cylindrical shape, and the stator 33 is disposed in the internal space thereof. The stator 33 and the rotor 34 constitute a magneto AC generator 31A. In the rotor 34, a plurality of magnets 41 are arranged at equal intervals along the circumferential direction so as to surround the stator 33 on the inner peripheral surface of the rotor yoke 40 constituting the flywheel. These magnets 41 are disposed so as to be able to face the front end portions 38 of the stator teeth 35 in the stator 33. The rotor yoke 40 of the rotor 34 also serves as a flywheel. When the rotor yoke 40 is attached to the crankshaft 19 so as to rotate integrally, the magnets 41 pass through the outside of the front end portion 38 of the stator teeth 35 with an appropriate interval. Configured. A plurality of magnets 41 (for example, twelve in the second embodiment) corresponding to a plurality of (for example, twelve) stator teeth 35 are sequentially installed via gaps 42 where no magnet is present. And it arrange | positions so that the pole of the adjacent magnet 41 may become alternate while being magnetized by one magnet 41 one pole.

The rotor 34 rotates around the stator 33 in the direction of the arrow P as the crankshaft 19 rotates, so that an induction current is induced in the stator (electrical) coil 37 of the stator 33 by the action of electromagnetic induction to generate power. It is. As shown in FIGS. 13, 14 A, and 14 B, a rotor cover 43 is attached to the plurality of magnets 41 of the rotor 34 so as to cover each magnet 41 from the inner peripheral side. The rotor cover 43 is formed, for example, by a metal thin plate having a thickness of 0.3 mm in a hooked sleeve shape, and protects each magnet 41 disposed on the inner peripheral side of the rotor yoke 40. The rotor cover 43 has a window hole 51 that covers and closes the gap 42 where the magnet 41 does not exist, and exposes each magnet 41 to the tip portion 38 of the stator tooth 35 in a one-to-one correspondence.

In addition, the circumferential angle of the magnet 41 in the second embodiment (a central angle formed by straight lines connecting the

end lines

44A and 44B of the magnet 41 and the rotation center O of the crankshaft 19) is θa, and the gap 42 between the magnets 41 is set. When the angle in the circumferential direction (center angle formed by straight lines connecting the

end lines

44A and 44B of the magnet 41 arranged on both sides of the gap 42 and the rotation center of the crankshaft 19) is θb, for example, θa = 21 °, θb = 9 ° is set.

Further, the rotor cover 43 is formed such that the pitch interval of the window holes 51 forms a center angle θc as shown in FIG. 14B, and the center angle of the window holes 51 (the circumferential direction formed by the front end and the rear end of the rotation direction of the window holes 51). Angle) is formed by θd. In the second embodiment, the central angle θc is 30 °, for example, and the central angle θd is 16 °, for example.

By the way, when the generator for the motorcycle of the second embodiment is a three-phase magneto-alternator 31A, the stator 33 has a stator coil 37 composed of a three-phase winding on a coil winding portion 36 of a stator tooth 35. It is arranged as. The stator coil 37 is Y-connected, and its output is passed through a regulator / rectifier (hereinafter referred to as a regulated rectifier) 55 or 56 having a rectifying function controlled as a power generation circuit, as shown in FIG. 15 or FIG. Are connected to a battery 57 and a power generation load 58 which is a vehicle load. Reference numeral 59 denotes an ignition switch.

Among these, the regulator rectifier 55 shown in FIG. 15 is a combination of a rectifier 60 formed of a diode 62 that rectifies the AC output of a generator and a regulator 61 that adjusts the voltage so that the voltage becomes a certain value or more. This is a short phase regulated rectifier. The rectifier 60 forms a rectifier bridge circuit with a pair of diodes 62 (62a, 62b, 62c; 62d, 62e, 62f), and the stator coil 37 of the magneto generator 31A has

windings

37a, 37b of each phase. , 37c are connected to the anodes of the diodes 62a, 62b, 62c and the cathodes of the

diodes

62d, 62e, 62f, respectively. The cathodes of the diodes 62a, 62b, and 62c and the anodes of the

diodes

62d, 62e, and 62f are connected to the battery 57, respectively. The regulated rectifier 55 constitutes a charging circuit for connecting the generator from the magneto generator 31 A to the battery 57 via the rectifier 60 and charging the battery 57.

The regulator 61 includes

thyristors

63a, 63b, and 63c connected to the

windings

37a, 37b, and 37c of each phase of the stator coil 37, and a voltage control circuit 64 connected to the gates of the

thyristors

63a, 63b, and 63c. The The voltage control circuit 64 monitors the battery voltage, and when the battery voltage reaches a predetermined voltage, performs the gate control of the thyristor 63 (63a, 63b, 63c) of the regulator 61, and generates power by short-circuiting the generated current. Short control to return to the machine 31A is performed.

As shown in FIG. 17, the voltage control circuit 64 of the regulator 61 includes a battery voltage detection unit 65 that detects the voltage of the battery 57, a reference voltage generation unit 66, and whether or not the voltage of the battery 57 is equal to or higher than a predetermined voltage. And a gate voltage control unit 68 that gate-controls the thyristor 63 in the regulator 61 when the battery voltage reaches a predetermined voltage based on the determination result.

The short regulator rectifier (regulator / rectifier) 55 is a short circuit that shorts excess current that is no longer needed by the thyristor 63 and returns it to the generator 31A when the battery 57 is not fully charged after being fully charged. Control is performed. For this reason, in the short-type regulated rectifier 55, a current always flows through the generator 31A due to the short control, so that the copper loss of the stator coil 37 and the iron loss of the stator 33 occur, and the electric loss occurs. This electrical loss is a burden on the engine and has an adverse effect on fuel consumption.

In the generator for a motorcycle, when charging, the stator coil 37 of the magneto generator 31A is connected to the battery 57 via the three-phase short regulator rectifier 55 to charge the battery 57. Even when the battery 57 reaches a predetermined voltage and is no longer charged, the surplus current is short-circuited by the gate control of the thyristor 63 (63a, 63b, 63c) of the regulator rectifier 55, and the thyristor. In 63, short-circuit control is performed to return the generated current to the stator coil 37, which is a power generation coil. For this reason, a current always flows through the stator coil 37 of the magneto generator 31A, copper loss is generated in the stator coil 37, and the copper loss of the stator coil 37 becomes a load on the engine.

From this point, a three-phase open type regulator rectifier (regulator / rectifier) 56 that prevents the surplus current that is no longer required to be charged to the battery 57 from flowing through the stator coil 37 is configured as shown in FIG. Is done. This regulated rectifier 56 is provided with a rectifier 71 by a thyristor 70 without using a rectifier by a diode.

The regulated rectifier 56 is a three-phase open combination of a rectifier 71 by a thyristor 70 that rectifies the AC output of the generator and a regulator 72 that controls the voltage so that the voltage does not exceed a certain level using the thyristor 70. It is an expression rectifier. A rectifier bridge circuit is configured by the thyristors 70 (70a, 70b, 70c; 70d, 70e, 70f) paired with the rectifier 71, respectively. The stator coil 37 of the magneto generator 31A is connected to the cathodes of the thyristors 70a, 70b, and 70c and the anodes of the thyristors 70d, 70e, and 70f for the

windings

37a, 37b, and 37c of the respective phases to constitute the rectifier 71. . The regulated rectifier 56 constitutes a charging circuit for charging the battery 57 by supplying the generated current from the magneto generator 31A to the battery 57 via the rectifier 71 comprising the thyristor 70 during charging.

The remaining gates of the thyristors 70 (70a, 70b, 70c) constituting the rectifier 71 are connected to a voltage control circuit 74 to constitute a regulator 72. The voltage control circuit 74 of the regulator 72 is configured in the same manner as the voltage control circuit 64 shown in FIG. 17, and has the same configuration as the voltage control circuit 64 shown in FIG. Therefore, duplicate explanation is omitted. When the voltage of the battery 57 reaches a predetermined value, the voltage control circuit 74 gate-controls the thyristor 70 to turn off the thyristor 70 and open control the regulator rectifier 56.

The open regulator rectifier 56 performs open control in which the voltage control circuit 74 turns off the thyristor 70 when the battery voltage reaches a predetermined voltage and is not charged. As a result, no current flows through the stator coil 37, which is a power generation coil. The copper loss of the stator coil 37 can be reduced, and the electrical resistance can be reduced. For this reason, when the three-phase open-type regulated rectifier 56 shown in FIG. 16 is used, as shown in FIG. 18, the engine speed is medium / low (the engine speed is, for example, 7000 rpm or less). The loss can be reduced as compared with the case where the short-type regulated rectifier 56 is used.

However, in the open-type regulated rectifier 56 of FIG. 16, when the battery voltage reaches a predetermined voltage and the open control for turning off the thyristor 70 is performed, the coil current does not flow through the stator coil 37 that is the power generation coil. Therefore, no coil magnetic flux is generated in the magneto generator 31A, and the iron loss of the stator 33 increases. The iron loss of the stator 33 has a characteristic of increasing in proportion to the square of the frequency that is the rotational speed of the rotor 34. Therefore, as shown in FIG. 18, when the short regulator rectifier 55 is employed in the high engine speed range due to an increase in the iron loss of the stator 33 in the open regulator rectifier 56, There is a reversal phenomenon in which the electrical loss increases rapidly.

FIG. 18 shows the relationship between the engine speed and electrical loss. Symbol A shows the electrical loss curve when the three-phase short regulator rectifier 55 is used in the magneto generator of the current specification, and symbol B is It is an electric loss curve at the time of using the three-phase open type regulated rectifier 56 for the magneto generator of the present specification. Reference symbol C denotes an electric loss curve when a three-phase open type rectifier 56 is used in a magneto generator using a magnetic steel sheet, for example, a non-oriented electrical steel sheet, as the stator teeth 35.

As shown in FIG. 18, when a magneto generator 31A using a magnetic steel sheet for the stator teeth 35 of the stator 33 is combined with an open-type regulated rectifier 56, the electric loss curve C extends over the entire engine speed range. The present applicant has found that the electrical loss can be greatly reduced. Further, when a magneto generator 31A using a magnetic steel plate is used in combination with the three-phase open regulator rectifier 56, an electric loss curve A using a three-phase short regulator rectifier 55 with the current magneto generator is used. Compared with the electric loss curve B and the electric loss curve B, it was confirmed that the electric loss can be greatly reduced over the entire engine speed range.

By the way, as shown in FIG. 12 and FIG. 18, the stator teeth 35 of the stator 33 used in the magneto generator 31A are laminated with core sheets of thin steel plates and assembled integrally with mounting bolts 39 or the like. Is done. The core sheet of the stator teeth 35 is composed of a rolled steel plate (SPCC) or a magnetic steel plate (silicon steel plate) of a thin steel plate having a thickness of 0.2 mm to less than 1.0 mm.

The magneto stator of the current-generation magneto generator is manufactured by laminating rolled steel plates (SPCC) with a thickness of 1.0 mm, and twelve rolled steel plates with a thickness of 1.0 mm are stacked and integrally laminated. . In the magneto generator of the current specification, a rolled steel plate having a thickness of 1.0 mm is used as the magneto stator. Therefore, as shown by a symbol D in FIG. 19, the electrical loss of the magneto generator extends over the entire rotation range of the engine. For this reason, electrical loss is a burden on the engine, making it difficult to improve fuel efficiency.

In contrast, a core sheet having a thickness of less than 1.0 mm is used instead of the rolled sheet steel sheet having a thickness of 1 mm for the stator teeth 35 of the magneto generator 31A. For the stator teeth 35 of the stator 33, for example, a 0.5 mm thick rolled steel plate (SPCC) core sheet or a 0.5 mm thick electromagnetic steel plate (silicon steel plate) is used. In the magneto generator 31A using the stator teeth 35 in which a plurality of core sheets (for example, 20 to 24 sheets) of a thin rolled steel plate having a thickness of 0.5 mm are stacked, the electrical loss of the generator is represented by the curve E, and the thickness In the magnetoelectric generator 31A of the stator teeth 35 specification in which a plurality of core sheets (for example, 20 to 24 sheets) of 0.5 mm thin electromagnetic steel sheets are stacked, the electrical loss of the generator is represented by a curve F. These electric loss curve lines E and F confirm that the electric loss can be reduced over the entire engine speed range as compared with the electric loss curve D using a core sheet of a rolled steel sheet having a thickness of 1.0 mm. Can do. This is because the eddy current loss can be reduced by thinning the core sheet used for the stator teeth 35 of the stator 33, so that the electrical loss of the magneto generator 31A can be reduced. .

Further, a stator 33 is manufactured by using a core sheet of a thin rolled steel plate having a thickness of 0.5 mm or a core sheet of an electromagnetic steel plate having a thickness of 0.5 mm for the magneto generator 31A. When the iron loss of the stator 33 is reduced using the power generation circuit combined with the open-type regulated rectifier 56 shown in FIG. It is expressed as shown. According to FIG. 19, the electrical loss of the magneto generator 31 A is greater when the 0.5 mm thick electromagnetic steel plate is used than when the 0.5 mm thick thin rolled steel plate is used. It was found that the reduction effect was great.

This is because, as shown in FIG. 20A, in the stator 33, the

core sheets

75 and 75 of the rolled steel sheet used for the stator teeth 35 are not sufficiently insulated. For this reason, it is thought that the core sheet of each rolled steel sheet is conducted with a certain electric resistance, and the eddy current generated in the stator teeth 35 is not completely suppressed. From this point, in order to insulate the

core sheets

75 and 75 of each rolled steel sheet, the stator sheets 33 are insulated by insulating the

core sheets

75 and 75 of the rolled steel sheets as shown in FIG. 20B. The effect of reducing iron loss can be exhibited. Insulating treatment is performed by coating the core sheet 75 of the rolled steel sheet with resin, sandwiching an insulating sheet or paper between the core sheets 75 one by one, or coating the core sheet 75 with an insulating paint.

By applying insulation treatment to the core sheet 75 of the rolled steel sheet, the magneto generator 31A using the rolled steel sheet having a thickness of less than 1 mm can be expected to further reduce the electrical loss as compared with the rolled steel sheet having a thickness of 1 mm. . The 0.1 mm core sheet is too thin to be practical.

[Effects of Second Embodiment]
In the motorcycle generator of the second embodiment, the stator coil 37 of the magneto generator 31 A is connected to the battery 57 via the regulator rectifier 56 by the thyristor 63, and the regulator rectifier 56 is connected to the battery 57. The voltage is monitored, and when the battery voltage reaches a predetermined voltage, the voltage control circuit 74 controls the thyristor 70 to be OFF by the gate control of the thyristor 70 and controls the regulator rectifier 56 to be open. When it reaches, open control that does not flow the generated current from the magneto generator 31A can reduce the copper loss of the stator coil 37 and reduce the electrical loss, thereby reducing the load on the engine and reducing the fuel consumption. Can be improved.

In addition, the magneto generator 31A uses an open-type regulated rectifier that reduces copper loss, while selecting a stator core material that reduces iron loss of the stator 33 or combining it with the thinning of the core sheet of the stator teeth. As a result, it is possible to achieve a loss reduction effect of electric loss in the entire engine speed range, and improve the fuel efficiency of the vehicle.

Further, the magneto generator 31A can reduce the electrical loss of the generator over the entire rotation region of the engine by thinning the core sheet of the stator teeth in the stator 33 or by performing insulation treatment between the core sheets. The power generation output and the power generation efficiency can be improved, and the fuel efficiency of the vehicle can be improved.

In the second embodiment, an example in which a magneto generator 31A used for a generator for a motorcycle is combined with three-phase regulated rectifiers (regulator / rectifier) 55, 56 has been described. For example, FIG. 21A Or a single-phase AC-DC generator shown in FIG. 21B. The single-phase full-charge generator shown in FIG. 21A is used in combination with a single-phase full-wave open-type regulated rectifier 80 and a single-phase generator 31B. The single-phase AC-DC generator shown in FIG. 21B is used in combination with the single-phase open-type regulated rectifier 90 and the single-phase generator 31B. The single-phase open regulator rectifier 90 includes a voltage control circuit 92 that controls the voltage of the battery 57 by controlling the thyristor 91a for positive voltage, and a lamp that controls the voltage of the lamp 94 by controlling the thyristor 91b for negative voltage. A voltage control circuit 93 is provided.

As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention.

31, 31A, 31B Magnet device (generator)
33 Stator 34 Rotor 35 Stator Teeth 36 Coil Winding Section 37 Coil 38 Front End 38A of Stator Teeth One Side Portion 38B of Stator Teeth Other Side Portion 40 of Stator Teeth 40 Rotor Yoke 41 Magnet 42 Gap 44A Magnet Rotation Direction front end 44B Magnet rotation direction

rear end

55, 56, 80, 90 Regulator / actuator (regulator rectifier)
57 battery 58

power generation load

60, 71 rectifier 61 regulator 62

diode

63, 70

thyristor

64, 92 voltage control circuit 65 battery voltage detection unit 66 reference voltage generation unit 67 determination unit 68 gate voltage control unit 93 lamp voltage control circuit 94 lamp L , M Circumferential length N Center line O Center P Rotational direction θa, θb Circumferential angle

Claims

A stator provided with a stator coil wound around each of a plurality of stator teeth extending radially from the center;
In a generator for a motorcycle provided in a power unit of a motorcycle having a magnet installed on an inner peripheral surface of a rotor yoke and having a rotor rotating around the stator around the center,
A plurality of the magnets are installed adjacent to each other with a gap in the circumferential direction of the rotor,
The stator teeth are configured by laminating a plurality of core sheets of thin steel plates, and have tip portions that extend from the coil winding portion around which the stator coil is wound to the rotation direction side and the counter rotation direction side of the rotor. And
One portion of the tip end portion of the stator teeth extending in the rotation direction of the rotor is a leading magnet adjacent to the rotation direction front end when the rotation direction front end of the magnet substantially coincides with the center line of the coil winding portion. A generator for a motorcycle, characterized by being configured to overlap with the motor.
2. The generator for a motorcycle according to claim 1, wherein the front end portion of the stator teeth is formed such that one side portion extending in the rotation direction side of the rotor is longer than the other side portion extending in the counter rotation direction side of the rotor.
A stator provided with a stator coil wound around each of a plurality of stator teeth extending radially from the center;
In a generator for a motorcycle provided in a power unit of a motorcycle having a magnet installed on an inner peripheral surface of a rotor yoke and having a rotor rotating around the stator around the center,
A plurality of the magnets are installed adjacent to each other with a gap in the circumferential direction of the rotor,
The stator teeth are configured by laminating a plurality of core sheets of thin steel plates, and have tip portions that extend from the coil winding portion around which the stator coil is wound to the rotation direction side and the counter rotation direction side of the rotor. And
When the rear end in the rotation direction of the magnet substantially coincides with the center line of the coil winding portion, the front end in the rotation direction of the succeeding magnet adjacent to the rear end side in the rotation direction does not overlap the front end of the stator teeth. A generator for a motorcycle, wherein a gap is set between the magnets.
When the front end in the rotational direction of the trailing magnet substantially coincides with the center line of the coil winding portion in the stator teeth, the one side portion extending in the rotational direction of the rotor in the stator teeth is the front end side in the rotational direction of the trailing magnet The generator for motorcycles according to claim 3 constituted so that it may overlap with said magnet adjacent to.
The generator for a motorcycle according to any one of claims 1 to 4, wherein a ratio of a circumferential angle between a magnet included in the rotor and a gap between the magnets is 7/3: 1.
The generator for a motorcycle according to any one of claims 1 to 5, wherein a plurality of magnets provided in the rotor are installed corresponding to 1: 1 on a plurality of stator teeth of the stator.
The generator for a motorcycle according to any one of claims 1 to 6, wherein twelve stator teeth of the stator and twelve magnets of the rotor are provided along the circumferential direction.
The generator for a motorcycle according to any one of claims 1 to 7, wherein a metal cover having an opening exposing a part of the magnet is attached to an inner peripheral surface of the magnet of the rotor.
The generator for a motorcycle according to any one of claims 1 to 8, wherein the stator teeth are configured by laminating a plurality of rolled steel plates or electromagnetic steel plates made of a core sheet of a thin steel plate having a thickness of less than 1 mm.
The generator for a motorcycle according to any one of claims 1 to 9, wherein the stator teeth are provided with through holes for assembly that penetrate through core sheets of a plurality of laminated thin steel plates.
A stator provided with a stator coil wound around each of a plurality of stator teeth extending radially from the center;
In a generator for a motorcycle provided in a power unit of a motorcycle having a magnet installed on an inner peripheral surface of a rotor yoke and having a rotor rotating around the stator around the center,
A plurality of the magnets are installed adjacent to each other with a gap in the circumferential direction of the rotor,
The stator teeth have a tip portion extending from a coil winding portion around which the stator coil is wound to a rotation direction side and a counter rotation direction side of the rotor,
The stator coil is connected to a battery via a thyristor regenerator / actuator (regulator rectifier), and the regregator / actuator is configured by connecting a gate of the thyristor to a voltage control circuit,
The generator for a motorcycle according to claim 1, wherein when the charging voltage of the battery reaches a predetermined voltage, the voltage control circuit turns off the thyristor to open-control the reregulator / actuator.
The generator for a motorcycle according to claim 11, wherein the stator teeth of the stator are configured by laminating a plurality of rolled steel sheets or electromagnetic steel sheets made of a core sheet of a thin steel plate having a thickness of 0.2 mm to less than 1 mm.
The stator teeth are formed by laminating a plurality of rolled steel plates made of a core sheet of a thin steel plate having a thickness of less than 1 mm. Each of the rolled steel plates is coated with an insulating resin material, or each of the rolled steel plates is one by one. The generator for a motorcycle according to claim 11, wherein the stator teeth are configured by sandwiching an insulating sheet of paper or resin between them, or applying an insulating paint.
The generator for a motorcycle according to claim 11, wherein the stator teeth are made of a magnetic steel plate as a core sheet of a thin steel plate having a thickness of less than 1 mm.
The generator for a motorcycle according to claim 14, wherein the electromagnetic steel plate of the stator teeth is a non-oriented electromagnetic steel plate.