JPH0635643Y2 - Generator coil connecting device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a coil connecting device for a generator, and in particular, an armature coil is wound around salient poles of an outer peripheral portion of a stator core arranged on the center side. The present invention relates to a connecting device for an armature coil wound around the salient pole in an outer rotor type generator in which the rotor is rotated on the outer peripheral side of the armature coil.

[Outline of device]

According to the present invention, a guide rib is formed near the portion of the bobbin attached to the surface of the stator core where the lead is inserted, and this rib guides the varnish during the varnish treatment to pass the small holes of the bobbin to the stator core. The varnish is introduced into the lead holding portion, and the leads are fixed by this.

[Conventional technology]

An outer rotor type generator is known as a type of high frequency generator. This generator has a large number of salient poles on the outer peripheral portion of the stator core, and armature coils are wound around these salient poles. Then, the outer rotor arranged on the outer peripheral side of the stator core is rotationally driven to extract the power generation output by the armature coil.

[Problems to be solved by the invention]

In such a generator, the end portions of the coil wound around the salient poles of the stator core are wound around the leads held on the center side of the stator core and soldered, and the ends on the fixed side are fixed through the leads. It is designed to be connected to a circuit. Further, the coil wound around the salient pole is varnished so that the withstand voltage is increased. However, conventionally, the varnish has not been guided to the lead portion on the center side, and thus there is a drawback in that it is not possible to prevent the lead from wobbling.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a generator coil connecting device in which a lead planted on the center side of a stator core is securely fixed with a varnish. It is intended.

[Means for solving problems]

The present invention provides an outer rotor type generator in which an armature coil is wound around salient poles of an outer peripheral portion of a stator core fixedly arranged on the center side, and a rotor is rotated on the outer peripheral side of the armature coil. A peripheral wall that is connected to the armature coil of a lead that is attached to the stator core and that penetrates a portion that extends toward the center of the bobbin, and that extends circumferentially at a position that substantially corresponds to the root portion of the salient pole of the bobbin. A notch is formed on the bobbin, and a guide rib is formed at a portion of the bobbin through which the lead is inserted, and the varnish is inserted into the small portion of the bobbin by the notch and the guide rib during varnish treatment. It is introduced into the holding portion of the lead of the stator core through the hole.

[Action]

Therefore, during the varnish treatment, the varnish adheres to the coil wound around the salient pole, and this varnish flows further toward the center side through the notch in the peripheral wall of the bobbin, and the guide ribs pass through the small holes in the bobbin to lead the stator core. The lead is fixed to the holding part by the varnish.

〔Example〕

FIG. 3 shows a generator according to this embodiment, which is composed of a high frequency generator driven by an engine. A mounting sleeve 10 is formed on a part of the engine casing.
The stator core 11 is fixed to the tip of the. As shown in FIG. 4 and FIG. 5, the stator core 11 is provided with a large number of salient poles 12 on its outer peripheral portion, and these salient poles 12 are provided with 15 power-generating armature coils 14 via bobbins 13. 6 battery charging generator coils 15 and 1-phase ignition generator coil 1
6. Similarly, a single-phase power generation coil 17 for power supply is wound, and a total of 23 salient poles 12 are provided with coils.

Of these coils, the power-generating armature coil 14 is connected to the regulator 19 via a three-phase full-wave rectifying circuit composed of six diodes 18, as shown in FIG. The regulator 19 is connected to an inverter 20, and the inverter 20 is adapted to obtain an AC output of a low frequency, for example, a commercial frequency of 50 Hz or 60 Hz. Further, the battery charging generator coil 15 is connected to a three-phase half-wave rectifying circuit composed of three diodes 21, and the output of this rectifying circuit charges a battery (not shown). The ignition generator coil 16 is connected to the ignition circuit 22, and the output of the ignition circuit 22 causes the ignition plug 23 to operate.
A spark is generated at the ignition point.
Next, the power generating coil 17 is connected to the power circuit 24. The power supply circuit 24 is the regulator
It is designed to drive 19 and the inverter 20.

Next, explaining the structure of the rotor of this generator,
A through hole is formed in the mounting sleeve 10 as shown in FIG. 3, and a ball bearing is formed in this through hole.
25 and an oil seal 26 are fitted. A crankshaft 27 extends toward the generator so as to pass through the bearing 25 and the oil seal 26, and a rotor yoke 29 is coupled to a tapered portion on the tip end side of the crankshaft 27 via a coupling boss 28. It is like this. A magnet 30 is fixed to the rotor yoke 29 so as to face the salient pole 12 through a minute air gap. Further, a cooling fan 31 is fixedly attached to the rotor yoke 29 to cool the generator.

As shown in FIG. 4, the ends of the four types of coils 14, 15, 16 and 17 wound around the salient pole 12 of the stator core 11 are small holes provided on the center side of the stator core 11. The lead 35 is inserted into the lead 35, and the lead 35 is soldered and connected to the lead 35.
The ends of the coils 14 to 17 are introduced to the center side through the notches 36 in the peripheral wall of the bobbin 13 shown in FIG. 1 and are connected to the leads 35.

The bobbin 13 is formed by inserting the stator core 11 in an injection molding die and injecting a molten resin into the cavity of the die to insert-mold the salient pole portion. ing. The portion of the bobbin 13 surrounding the outer peripheral side of the salient pole 12 forms a winding frame, and forms the winding frame of the armature coil 14 and the magneto coils 15 to 17 described above. Moreover, at the time of such insert molding, the bobbin 13 is molded so as to extend to the center side of the stator core 11. That is, the bobbin 13 is the stator core 11
It is designed to extend to the upper and lower end faces on the center side of. The portion of the small hole 34 through which the lead 35 is inserted is also covered by the extended portion extending toward the center of the bobbin 13. FIG. 1 shows, for convenience, only a portion closer to the center than the peripheral wall formed at a position substantially corresponding to the root portion of the salient pole 12 of the bobbin 13. That is, FIG. 1 shows the bobbin 13
It is the appearance of the part extended to the center side of.

A radial rib 37 is formed on the upper surface of the bobbin 13 where a small hole 34 for receiving the lead 35 is provided, and a guide rib 38 is provided in a region defined by the radial rib 37. With this rib 38, the varnish is introduced into the small hole 34. Coil 14
The varnishes 17 to 17 are performed by the varnish 40 in the dip bath 39 shown in FIG. 2, and at this time, the stator 11 is slowly rotated as indicated by the arrow. Therefore, a part of the varnish 40 attached to the coils 14 to 17 flows toward the center side on the surface of the bobbin 13 through the notch 36 and is guided to the small hole 34 by the guide rib 38. Therefore, the lead 35 inserted in the small hole 34 is
It is fixed by 40, and the lead 35 is prevented from wobbling.

In the above structure, when the engine directly connected to the generator is driven, the crankshaft 27 rotates the rotor yoke 29 shown in FIG. Therefore, the magnet 30 is rotated with respect to the stator core 11, which causes the power-generating armature coil 14 to generate a high-frequency AC output. This output is rectified by a full-wave rectifying circuit composed of six diodes 18, the voltage is adjusted by a regulator 19 shown in FIG. 6, and further converted into a low-frequency AC by an inverter 20. . Regulator 19
The inverter 20 is driven by the output of the single-phase coil 17 via the power supply circuit 24.
At this time, the engine is ignited by the output of the ignition power generation coil 16 via the ignition circuit 22. Further, if necessary, the output of the power generation coil 15 is used to charge the battery via the half-wave rectifier circuit including the diode 21.

In such a generator, the ends of the coils 14 to 17 are entangled and soldered to the lead 35 held on the center side of the stator core 11. After the inspection, the varnish is varnished as shown in FIG. 2. In order to prevent the lead 35 from moving during the insulating treatment with the varnish, the varnish 40 is attached to the bobbin 13 shown in FIG. While being guided along the guide ribs 38 on the surface of the above, it is guided to the small hole 34 and introduced into the holding portion of the lead 35 in this small hole 34.
That is, when performing the varnish treatment, the varnish is guided by the ribs 38 for the purpose of simultaneously preventing the movement of the leads 35.
The lead 35 is caused to flow around the lead 35, and the lead 35 is fixed to obtain a highly reliable connection device.

[Effect of device]

As described above, according to the present invention, the armature coil is connected to the lead penetrating the portion attached to the stator core and extending to the center side of the bobbin, and the circle is provided at a position substantially corresponding to the root of the salient pole of the bobbin. A notch is formed in the peripheral wall extending in the circumferential direction, and a guide rib is formed at the portion where the lead of the bobbin is inserted, and a small portion of the bobbin in which the lead is inserted by the notch and the guide rib during varnish processing. It is adapted to be introduced into the holding portion of the lead of the stator core through the hole. Therefore, the lead connected to the coil is fixed by the varnish, and the reliability of the connecting device can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outer appearance of a portion of an outer rotor type generator according to an embodiment of the present invention, the portion extending toward a center of a bobbin.
The figure is a front view showing the varnish treatment of the stator, FIG. 3 is a vertical sectional view showing the overall structure of the generator, FIG. 4 is a front view of the stator, and FIG. 5 is a sectional view taken along line V-V in FIG. , FIG. 6 is a circuit diagram of this generator. The names of the main parts in the drawings are as follows. 11 …… stator core 12 …… salient pole 13 …… bobbin 14 …… generator armature coil 15 …… battery charging generator coil 16 …… ignition generator coil 17 …… power generator coil 29 …… rotor yoke 30 …… Magnet 34 Small hole 35 Lead 36 Notch 38 Guiding rib 39 Dipping bath 40 Varnish

Claims (1)

[Scope of utility model registration request] 1. An outer rotor type generator in which an armature coil is wound around salient poles of an outer peripheral portion of a stator core fixedly arranged on the center side, and a rotor is rotated on the outer peripheral side of the armature coil. The armature coil is connected to a lead that is attached to the stator core and extends through a portion extending toward the center of the bobbin, and the armature coil extends in a circumferential direction at a position substantially corresponding to a root portion of the salient pole of the bobbin. A notch is formed on the peripheral wall, and a guide rib is formed at a portion of the bobbin through which the lead is inserted, and a varnish is inserted into the bobbin by the notch and the guide rib during varnish treatment. A coil connecting device for a generator, characterized in that it is introduced into a holding portion of the lead of the stator core through a small hole.