JPH0119573Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stator for a magnet generator, and particularly to a stator for a magnet generator, in which a generator coil is wound around each convex pole portion of a convex pole iron core.

In this type of stator, a structure was often adopted in which a bobbin was attached to the core and the coil was wound on the bobbin in order to insulate between the core and the core. Since the bobbin is interposed between the coils, heat dissipation is poor and the coil temperature inevitably increases. Therefore, it is necessary to use enamelled copper wire with high heat resistance, which has the disadvantage of increasing costs. Further, since the temperature of the coil becomes high, the bobbin may be deformed due to cooling/heating cycles, vibrations, etc., and the coil may become loose. Therefore, a powder coating stator is sometimes used, in which a powder resin is coated on the surface of the core to form an insulating layer, and a coil is wound on top of the insulating layer. The process requires a lot of man-hours, especially when winding a coil using very thin wire, such as an exciter coil used as an ignition power source for an ignition system for an internal combustion engine. It requires a large amount of man-hours to perform insulation and insulation treatments. FIG. 1 shows a conventional terminal treatment structure of an exciter coil 3 wound around a convex pole part 2 of a laminated core coated with a powder coating 1.
The winding start end 3a of the exciter coil 3 is drawn out to the outer surface of the coil, twisted 2 to 3 turns and soldered to the core wire of the lead wire 4 for external drawing. An insulating tube 5 is fitted over the soldered portion, and an insulating tape 6 is inserted between the tube 5 and the coil 3. Then, with the tube 5 applied to the surface of the coil 3 via the insulating tape 6, the end of the lead wire 4 and the tube 5 are connected to the coil 3.
Adhesive tape 7 is wound so as to fix it. As described above, the conventional coil terminal processing structure requires many members such as an insulating tube, insulating tape, and adhesive tape to insulate and protect the coil terminal and prevent wire breakage. This method requires a lot of man-hours, and especially when multiple exciter coils are installed, many parts and man-hours are required at the joints between the terminals of each coil, resulting in a very high cost. It was hot.

An object of the present invention is to provide a stator for a magnet generator in which the above-mentioned drawbacks are eliminated by processing the end portion of the coil using a simple connector.

The stator of the present invention will be explained in detail below with reference to the illustrated embodiments.

2 to 4 show an embodiment of the present invention. In FIG. 2, reference numeral 10 denotes eight convex pole parts 12a to 12a from an annular yoke part 11 having a substantially regular octagonal outline. It is an eight-pole star-shaped convex pole-shaped laminated iron core with radially protruding portions 12b, and pole piece portions 13a to 13h facing the magnetic poles of a magnet rotor (not shown) are provided at the tips of the convex pole portions 12a to 12h, respectively. ing. The pole piece portions 13a to 13h are formed by bending both side plates located at both ends of the iron core 10 in the stacking direction at right angles to the outside.
and 12b, cut and raised pieces 14 and 15 are provided near the base by cutting and raising a part of both side plates. Cut and raised piece 14 on one end side of the iron core 1 in the stacking direction
(See FIG. 4) are provided one each in the vicinity of the intermediate part of the convex pole parts 12a and 12h, in the vicinity of the intermediate part of the convex pole parts 12a and 12b, and in the vicinity of the intermediate part of the convex pole parts 12b and 12c, These three cut pieces 1
4 is used for fixing a connecting tool to be described later. Also, cut and raised piece 1 on the other end side in the lamination direction of the iron core.
5 are provided at positions corresponding to the convex pole portions 12a and 12b, respectively, and these cut and raised pieces 15 are used to prevent the exciter coil from unwinding. Incidentally, the cut and raised pieces 15 for preventing winding collapse can also be provided on the other convex pole portions 12c to 12h.

An insulating layer 16 (see FIG. 4) is formed on at least the portion of the outer surface of the iron core 10 where the coil is wound by a powder coating method in which a powdered resin is applied and hardened by heating. The generating coils 17a to 17a are connected to the convex pole portions 12a to 12h, respectively.
17h is wound. Among these coils, 17a and 17b are exciter coils used as ignition power sources for an ignition device for an internal combustion engine, and 17c, 17d, 17g, and 17h are lighting coils used as power sources for lighting loads such as headlamps. Further, 17e and 17f are battery charging coils used to charge the battery. Note that reference numeral 18 is a mounting hole for passing a screw for mounting the iron core.

A connector 20 is provided for terminal processing of the exciter coils 17a and 17b. The connecting tool of this embodiment is one of the octagonal outline shapes of the yoke part 11.
It consists of a base body 21 made of insulating resin that is formed in a substantially dogleg shape along the two corners, and terminal fittings 22a to 22d and a clamp piece 23 that are cast and fixed to the base body 21. Terminal fittings 22a~
A bottomed hole 24 into which each of the three cut and raised pieces 14 is tightly fitted is formed on the surface opposite to the surface from which the clamp piece 22d and the clamp piece 23 protrude. In this embodiment, the clamp piece 23 is arranged in the center, the terminal fittings 22b and 22c are arranged on both sides thereof, and the terminal fittings 22a and 22d are arranged on both sides of the terminal fittings 22b and 22c. And terminal fitting 22
b and 22c are integrally formed with the clamp piece 23 to form a substantially chevron-shaped terminal member, and the ends of the terminal fittings 22a and 22d embedded in the base body 21 are provided with retainers to prevent these terminal fittings from coming off. A protrusion 221 is formed for this purpose. Further, holes 222 are provided at the tips of the terminal fittings 22a to 22d for inserting and soldering the end portions of the coils and the core wires of the lead wires.

The above connection tool 20 has a bottomed hole 2 in its base body 21.
It is fixed to the iron core 10 by press-fitting the cut and raised pieces 14 of the iron core 10 into the iron core 4 . The winding start end of the exciter coil 17a is soldered to the terminal fitting 22a together with the lead wire 25.
The end of the winding a is soldered to the terminal fitting 22b. The winding start of the exciter coil 17b is soldered to the terminal fitting 22c, and the winding end (earth side end) of the exciter coil 17b is soldered to the lead wire 22c.
6 and is soldered to the terminal fitting 22d.
The clamp piece 23 is deformed to hold the lead wire 26, thereby clamping the lead wire 26, and the lead wire 26 is connected to the winding end (earth side end) of the lighting coil 17h and drawn out. The lighting coils 17c, 17d, 17g, and 17h are connected to each other in series, and external lead wires 27 and 26A are drawn out from the connection points between the winding start of the lighting coil 17c and the winding end of the lighting coil 17d and the lead wire 26, respectively. has been done. Battery charging coils 17e and 17f are also connected in series, and external lead wires 28 and 29 are drawn out from the beginning of winding of charging coil 17e and the end of winding of charging coil 17f, respectively. And lead wires 25, 26A,
27, 28, and 29 are all inserted into a tube 30 and pulled out to the outside, and the end of the tube 30 is clamped by a clamping tool 31 fixed to the yoke part 11.

When the terminal of the exciter coil is processed using the connector 20 as described above, there is no need to align the connection between the coil end and the lead wire with the outer surface of the coil, so insulation between the connection and the coil is reduced. No need to consider. Further, since the lead wire and the coil end portion are connected to the terminal fitting, there is no risk that the coil end portion will be disconnected even if tension is applied to the lead wire. Furthermore,
The connection tool can be fixed by simply inserting a cut piece made on the core into a hole made in the base, so it is useful when wrapping adhesive tape to fix the connection between the coil end and the lead wire. Fixing work becomes significantly easier.

The stator described above is attached to the engine by, for example, screwing screws inserted into the attachment holes 18 into attachment portions provided in the engine case or the like. And the yoke part 11
A flywheel magnet rotor (not shown) is attached to a rotating shaft (for example, a crankshaft of an engine) (not shown) passing through the central hole of the rotor, and the magnetic poles of this rotor are opposed to the convex pole parts 12a to 12h.

FIG. 5 shows an example of an electrical connection when power is supplied to an internal combustion engine ignition device, lighting load, and battery charging circuit using the stator coil of the above embodiment, and Ig is Ignition coil with primary coil l ₁ and secondary coil l ₂ , P is the spark plug connected to the secondary coil l ₂ , C is the capacitor connected in series to the secondary coil l ₁ , T is the capacitor This is a thyristor connected in parallel to the series circuit of C and primary coil _l1 , and an exciter coil 17a is connected to both ends of the thyristor T via a diode D.
and 17b are connected in parallel. The portion to the left of the exciter coils 17a and 17b in FIG. 5 constitutes a known capacitor discharge type ignition device, and the exciter coils 17a,
The electric charge of the capacitor C charged to the polarity shown in the figure by the output of one half cycle of 17b is transferred to the thyristor T.
Due to conduction, a discharge occurs to the primary coil _l1 , and an ignition operation is performed. In addition, the outputs of the battery charging coils 17e and 17f are applied to the rectifier Rec.
The DC output of Rec is applied to battery B.
A lighting load L such as a headlamp is connected to the lighting coils 17c, 17d, 17g, and 17h.

In the above embodiment, a roughly dogleg-shaped connector was provided near the convex pole around which the exciter coil was wound. It suffices if the structure has
Its specific structure is not limited to the above example. For example, as shown in FIG.
A connecting tool 20' may be used, in which terminal fittings 22'b and 22'c are fixed to a frame-shaped base 21' having an outline shape that matches the shape of the yoke portion 11'. In the example shown in FIG. 6, the iron core 10' has four poles, and one of the four convex pole parts 12'a to 12'd has a convex pole part 1.
An exciter coil 17'a is wound around 2'a. Further, power generation coils 17'b to 17'd, which are used as lighting coils or battery charging coils, are wound around the other convex pole parts 12'b to 12'd. The base body 21' of the connector 20' is fixed to the iron core 10' by press-fitting cut and raised portions 14' provided on the iron core 10' into two bottomed holes provided on each side of the base body 21'.
The connector 20' also includes an appropriate number of clamp pieces 2.
3' is fixed, and lead wires 2 drawn out from the coils 17'b to 17'd are fixed to the three corners of the base 21'.
7' to 29' and the notched groove 2 that fits the end of the coil
23 are provided. Terminal fittings 22'b and 22'c provided on the connector 20' are integrally connected within the base 21', and the end winding 17'a ₁ of the exciter coil 17'a is soldered to the terminal fitting 22'b. ing. The beginning of the winding of the exciter coil 17'a is grounded to the iron core 10'. A lead wire 25' is soldered to the terminal fitting 22'c, and the lead wires 25' to 25' are soldered to the terminal fitting 22'c.
29' are arranged along each side of the base body 21' and are appropriately clamped by clamp pieces 23', and the base body 29' is
They are inserted all at once into the tube 30 near the corners where the cutout grooves 223 of 1' are not provided, and led out to the outside. And the notch groove 223 of the base body 21'
The end portion of the tube 30 is clamped by a clamping tool 31 fixed to a corner portion where the tube 30 is not provided.

In the above embodiment, the terminal fitting of the connector is provided only for coils such as exciter coils that have a small wire diameter and whose terminal parts are easily broken, but terminal fittings can be provided for other coils as well. I can do it.

As described above, according to the present invention, a connecting tool is fixed to the iron core, and the terminal part of the coil and the lead wire connected to the terminal part are connected to the terminal fitting provided on the connecting tool. Many members conventionally required for terminal processing of a coil can be omitted, and the terminal processing work can be simplified. Further, since the complicated coil terminal processing work is eliminated, winding automation can be advanced, and costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the main parts of the conventional example, Fig. 2 is a front view showing an embodiment of the present invention, Fig. 3 is a front view showing an example of the connector used in the present invention, and Fig. 4 is a front view showing an example of the connecting device used in the present invention. FIG. 5 is a sectional view of a main part showing a state in which a connecting tool is attached in the embodiment shown in FIG. 2; FIG.
FIG. 6 is a front view showing another embodiment of the present invention. 10,10'... Iron core, 12a to 12h, 1
2'a to 12'd... Convex pole portion, 14... Cut and raised piece, 1
7a to 17h, 17'a to 17'd...Generating coil, 20...Connecting tool, 21...Base, 22a to 2
2d, 22'b, 22'c...terminal fittings.

Claims (1)

[Scope of utility model registration request] In a stator for a magnet generator, in which a power generating coil is wound around the convex pole part of an iron core having a plurality of convex pole parts, and a lead wire is electrically connected to the terminal part of a predetermined coil, the terminal fittings are made of insulating resin. A connecting tool is provided which is fixed to a base made of aluminum, a hole provided in the base of the connecting tool is fitted into a cut and raised piece provided on the iron core to fix the connecting tool to the iron core, and an end of the coil is fixed to the core. A stator for a magnet generator, characterized in that the lead wire and the lead wire are connected to the terminal fitting.