JPS5834741Y2 - inductance soch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an inductance device for an AC power source such as a discharge lamp ballast.

Conventionally, in these inductance devices, 50H
There are two types: z and 60 Hz, and each has its own specifications in order to obtain appropriate impedance.

However, these specifications are not necessarily determined so as to maximize material cost and performance, but should be made in consideration of the reusability of the iron core mold, etc.

For example, if a ballast for 50° is generally designed, which has a higher power loss, the center gap 12 will have an appropriate impedance when the butt parts of the EE type iron cores 13 and 14 are almost in close contact with each other, as shown in Figure 7. It is determined as follows.

Next, the same amount of EE type cores with the same winding diameter as the 60Hz ballast and the same center gap size as the 50Hz ballast are butted together, so that the butt portions of the EE type cores 13 and 14 are approximately the same. This is determined by reducing the number of turns so that proper impedance is achieved when they are in close contact.

Although the ballast determined in this way can share the core mold for 50 Hz and 60 stops, it has excessive quality compared to a ballast with 50 stops, which makes it impossible to further reduce material costs. Ta.

Specifically, for example, the iron core size is 17 x 22 m/m, the winding specification is 0.35φ, 710T, and the impedance voltage is 71.5■.
If we design a 50Hz ballast such that the center of the core is in close contact with each other, then if we use the above-mentioned core and set the number of turns of the 60Hz ballast so that the abutting portions of both ends are in close contact, the number of turns will be 650T.

Considering this in terms of magnetic flux density, the former is 12.8 kilogauss and the latter is 11.6 kilogauss.

Therefore, the ballast for 60Hz has significantly reduced iron loss and copper loss compared to the ballast for 50Hz, and furthermore, the degree of saturation is small even in the event of overvoltage, resulting in excessively excellent overvoltage characteristics.

Therefore, if the number of turns in a 60Hz ballast is determined to have the same magnetic flux density as a 50Hz ballast, the number of turns is 590.
T, and the amount of copper used can be significantly reduced.

However, if such a decision is made, a core with a center gap dimension even smaller than that determined for the ballast core for 50 Hz will be required, core molds for both 50 Hz and 60 Hz will be required, and the equipment will need to be Rising costs.

Management becomes complicated.

Also, if you use the 50Hz core and the 60Hz core,
When adjusting the appropriate impedance, the abutting portions of both end legs do not come into close contact with each other, and gaps are created in both end legs, resulting in the disadvantage that the overvoltage characteristics of the 50 Hz ballast deteriorate due to disturbance of magnetic flux.

The present invention is based on the conventional EE type iron core system.
This method solves the imbalance in the design standards of ballasts for 60 Hz and 60 Hz, and specific examples will be described below with reference to FIGS. 1 to 6.

Figure 1 shows an example of an inductance device embodying the present invention. In the figure, 1 is an approximately E-shaped iron core, and the tips 4 and 5 of the leg parts 2 and 3 at both ends are in the same direction at an angle of θ. is inclined to.

A winding 6 is wound around the center leg of the E-type iron core 1.

Reference numeral 7 denotes a substantially ■-shaped core that is pressed against the ends 4 and 5 of the legs at both ends of the E-type core 1, and is slightly longer than the width of the E-type core 1, and is brought into pressure contact with the ends 4 and 5 of the legs at both ends of the E-type core 1. The corresponding part has inclined portions 8 and 9 on both end sides, which are also inclined in the same direction.

Reference numeral 10 denotes a case, which protects these components and also serves to press the E and I type cores 1 and 7 together.

A gap portion 11 is formed between the E and I type iron cores 1 and 7, and the size of the gap portion 11 can be freely changed by shifting the relative positions of the ■ type iron core 7 and the E type iron core 1. It is.

By using the iron core configured in this way, 50H
z, 60)-Hz When using coils with the same magnetic flux density,
In the case of a ballast for 50 Hz, by moving the I-type core 7 to the left as shown in FIG. 2, the center gap 11 created by the E-type core 1 becomes larger.

After moving the I-shaped core 7 left and right in this manner, fine adjustment is made by hitting the ■-shaped core 7 with a hammer or the like and moving it left and right in order to adjust the impedance appropriately.

Next, in the case of a 60 Hz ballast, as shown in Figure 3,
By moving the type core 7 to the right, the center gap 11 created by the E and I type cores 1 and 7 becomes smaller.

After moving the ■-shaped iron core 7 to the right in this way, in order to adjust the appropriate impedance, the ■-shaped iron core 7 is further struck with a hammer or the like to move it from side to side for fine adjustment.

As mentioned above, when designing the inductance of a ballast for a discharge lamp using the E or I type iron core according to the present invention, no matter what impedance state there is, all the parts other than the iron core leg where the winding is always wound are always Because it is in close contact, there is a special 50
There is no need to create a dedicated iron core for 50 Hz and 60 Hz, and it is possible to design with the same magnetic flux density for 50 Hz and 60 Hz, and impedance adjustment can be finely adjusted by reducing the angle θ.

In addition, with conventional E and E type iron cores, when adjusting the impedance in the direction of increasing it by hitting the back of the E type iron core, once the impedance becomes too high, it is extremely difficult to widen the center gap and lower the impedance. However,
The E and I cores according to the present invention have the characteristics that impedance adjustment defects do not occur during the process because they can be performed extremely easily and accurately in any direction.

In addition to the single-light yoke coil type shown in Figures 1 to 3, the same applies to multiple lamp types as shown in Figure 4, auto-transformers as shown in Figure 5, and others. Of course, it can be applied to

Further, as shown in FIG. 6, a similar effect can be obtained by forming an inclined portion at the center.

Furthermore, it goes without saying that the present invention can be applied not only to ballasts for discharge lamps but also to other inductance devices for AC power supplies.

[Brief explanation of the drawing]

1 to 6 are side views of the core portion of an inductance device for an AC power source according to an embodiment of the present invention, and FIG. 7 is a side view of the core portion of a conventional inductance device. 1... E type iron core, 2, 3... Legs at both ends, 4.5... Inclined tip, 6... Winding wire, 7... ...■-type iron core, 8, 9...Both side inclined parts, 11...Gap part.

Claims (1)

[Scope of utility model registration request] It consists of an E-type core wrapped with a 50Hz or 60-stop winding wire that has almost the same magnetic flux density, and a ■-type core that is pressure-welded to the tips of the legs at both ends of the core. In order to obtain the optimum impedance at 50 Hz and 60 Hz, parallel slopes in the same direction are provided either in the center gap formed by the valley sides of the ■-type iron or on both sides of the ■-type core that is pressed against both legs of the E-type core. An inductance device for an AC power supply configured so that the size of the central gap can be varied by sliding E and I type iron cores and changing their relative positions.