JPH057941B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a stator for a magnet generator for an internal combustion engine.

[Prior art]

Conventionally, there is a device as described in Japanese Utility Model Application Publication No. 57-113672, and its configuration, as shown in FIG. 1, includes a general load core 3, a general load coil 5 wound around the core 3, and It consists of an ignition power supply core 4 and an ignition power supply coil 6 wound around the core 4. The ignition power supply coil 6 charges a capacitor 11 shown in FIG. 3 with an output in the positive direction, and outputs in a negative direction. The gate of the thyristor 12 is turned on to discharge the charge in the capacitor 11 to the primary coil 13 of the ignition coil, which works to generate a high voltage in the secondary coil 14 of the ignition coil. Here, the ignition power supply core 4 is separated from the general load core 3, and the magnetic flux φ ₁ passing through the ignition power supply core 4 only flows through the ignition power supply core 4. Even if there is a fluctuation, the magnetic flux passing through the ignition power supply core 4 does not fluctuate, which has the effect of reducing fluctuations in ignition timing and ignition performance.
The number of parts increases, there are four tightening holes 3a and 4a for the internal combustion engine, and there are many man-hours for assembly and the work is complicated. Furthermore, since the magnetic pole portions 3b and 3c of the general load core 3 are located adjacent to both sides of the ignition power source core 4, the magnetic flux passing through the general load core 3 is reduced, resulting in a decrease in output efficiency.

[Purpose of the invention]

In order to solve the above-mentioned drawbacks, the present invention includes a core having a plurality of protrusions in the radial direction, an ignition power supply coil and a general load coil wound around each protrusion of the core, and the general load coil. In a device equipped with a load coil whose generated output is constantly supplied to the load and a load coil whose generated output is intermittently supplied via a load switch, an ignition power supply core protrusion around which the ignition power supply coil is wound; A cutting portion is provided at a joint portion between a general load core protrusion around which the load coil, to which generated output is intermittently supplied via the load switch, is wound, and insulation is provided on almost the entire outer periphery of the core. A bobbin made of an insulating material such as a resin is formed by molding, the cut portion is also filled with the insulating material, and the entire core is formed into an integral ring shape with the insulating material interposed therebetween. Even if the magnetic flux of the general load core protrusion fluctuates due to the load fluctuation of the general load coil, the magnetic flux passing through the ignition core protrusion and the general load core protrusion is blocked by the cutting part and hardly flows, so the ignition power source It is an object of the present invention to provide an inexpensive stator for a magnet generator with an integrated core in which the magnetic flux of the core protrusion does not fluctuate.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings. In FIG. 2, 1 is a rotor formed by drawing an iron plate into a bowl shape, and 2 is magnetized in the radial direction by a plurality of magnets arranged and fixed at equal intervals on the inner circumference of the rotor 1. 31 is a plurality of pieces (4 pieces) protruding in the outer diameter direction
It is a star-shaped core having protrusions 31a to 31d for winding, and the three continuous protrusions 31a to 31c have coils 51a to 51c for general loads such as lamp lighting and battery charging (hereinafter referred to as load use) for bobbins described later. 7. One remaining protrusion 3
An ignition power source coil 6 is wound around 1d via a bobbin 7, which will be described later. Further, a cutting portion 31e is provided at the joint between the ignition power supply core projection 31d of the core 31 and the load core projection 31c. 51
is a load winding formed by connecting three load coils 51a to 51c in series; two coils 51a and 51b are used during daytime loads, and three coils 51a to 51c are used during nighttime loads. The circuit is shown in Figure 4. Reference numeral 6 denotes a coil for the ignition power supply, and the output in the positive direction charges the capacitor 11 shown in FIG. Discharge occurs to the coil 13, generates a high voltage in the secondary coil 14, and the spark plug 1
The ignition timing for ignition to 5 is determined. Reference numeral 7 denotes a bobbin fixedly formed on almost the entire outer periphery of the core 31 by molding almost the entire outer periphery of the core 31 except for the surface facing the magnet 2 and the center hole with an insulating material made of insulating resin. The resin is also filled in the gap of the cut portion 31e of the core 31, and the entire core 31 is formed into an integral ring shape through the insulating resin forming the bobbin 7. In Fig. 4, 8 is a general load such as a lamp, battery, etc., and switch 9 is used to turn it off at night.
Daytime (hill) switching is performed.
Further, in FIG. 2, reference numeral 31f denotes two tightening holes formed at the joint between the protrusions 31d and 31a of the core 31 and the joint between the protrusions 31b and 31c.

In the above configuration, the ignition power source core protrusion 31d
By providing the cutting portion 31e at the joint between the ignition power source core projection 31d and the night load core projection 31c, almost no magnetic flux φ ₂ flows through the ignition power source core projection 31d and the night load core projection 31c. Even if the magnetic flux flowing through the night load core protrusion 31c fluctuates during the night, the ignition power supply core protrusion 31
The magnetic flux flowing to d is almost the same as the ignition power supply core protrusion 31.
d and _the day/night core protrusion 31a, and this magnetic flux φ ₃ hardly changes even when the switch 9 is switched, so it has almost no effect on the output of the ignition power supply coil 6, and when the load is in the daytime or at night. Even if there are fluctuations, the ignition timing and ignition output can be prevented from changing.

Furthermore, if the circumferential width of the ignition power source core protrusion 31d facing the magnet 2 is made as small as possible with respect to the circumferential width of the magnet 2, the output waveform of the ignition power source coil will be steeper, and the output waveform will be more resistant to load fluctuations. Ignition timing changes can be made smaller.

Although the cut portion 31e in FIG. 2 is cut in a straight line, it does not have to be straight and may have various curved shapes as shown in FIGS. 5a and 5b.

In addition, the load connected to the general load coils 51a to 51c includes a day/night changeover switch 9.
Not limited to loads connected via an operation switch, but also loads connected via an operation switch (buzzer, motor, etc.)
Alternatively, it may be a load (such as a battery) that is always connected without going through a switch. for example,
Instead of the circuit shown in Fig. 4, power is supplied from some of the general load coils 51a and 51b to a load (such as a battery) that is always connected without going through a switch, and from the remaining general load coil 51c. If power is supplied to the load (buzzer, motor, etc.) through the operation switch, power will be intermittently supplied to the load from some of the load coils 51c through the operation switch. Even if the magnetic flux flowing through the protrusion 31c corresponding to the coil 51c changes, the cutting portion 3
The presence of 1e has almost no effect on the output of the ignition power supply coil 6, and it is possible to prevent the ignition timing and ignition output from changing due to intermittent operation of the operating switch.

Furthermore, the ignition circuit that uses the ignition power supply coil 6 as a power source is not limited to a capacitor discharge type ignition circuit, but can also be applied to a transistor current cutoff type ignition circuit that uses a transistor to intermittent the primary current of the ignition coil. The present invention can also be applied to a device in which an ignition signal is generated using another ignition signal generator without using the negative direction output of the secondary coil 6.

〔Effect of the invention〕

As described above, in the present invention, due to the presence of the disconnection part, the output efficiency of the general load coil is not significantly reduced, and even if the load of the general load coil fluctuates, the output of the ignition power supply coil is maintained. There is almost no influence, and it is possible to reliably prevent any negative impact on ignition performance.The insulating material that forms the bobbin allows the core to be integrated, including the cutting part, so the number of parts is reduced. It has the excellent effects of being able to have a strong structure and improving assembly workability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a magnet generator using a conventional stator, FIG. 2 is a cross-sectional plan view of essential parts showing an embodiment of a magnet generator using the stator of the present invention, and FIGS. The figures are electric circuit diagrams showing an example of an ignition circuit and a general load circuit that are applied to both the stator of the present invention and the conventional stator, respectively.
b is a sectional plan view of the main part showing two other embodiments of the structure of the main part of the stator of the present invention. 6...Ignition power supply coil, 7...Bobbin, 31
...Core, 31a to 31d...Protrusion, 31e...
Cutting portion, 51a to 51c...General load coil.

Claims (1)

[Claims] 1.Equipped with a core having a plurality of protrusions in the radial direction, and an ignition power source coil and a general load coil wound around each protrusion of the core, and as the general load coil, generated output is constantly supplied to the load. A load coil that is intermittently supplied via a load switch and a load coil that is intermittently supplied via a load switch, wherein the output is intermittently supplied via the ignition power supply core protrusion around which the ignition power supply coil is wound and the load switch. A cutting portion is provided at a joint portion with a general load core protrusion around which the supplied load coil is wound, and a bobbin made of an insulating material such as an insulating resin is molded around almost the entire outer periphery of the core. A stator for a magnet generator for an internal combustion engine, which is formed by molding, wherein the cut portion is also filled with the insulating material, and the entire core is formed into an integral ring shape with the insulating material interposed therebetween.