JPH0124025B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for attaching a surge absorption element including a noise killer capacitor to a voltage regulator of an alternating current generator used in a vehicle or the like.

[Conventional technology]

As shown in FIG. 1, conventional surge absorbing elements, such as noise killer capacitors 14, are generally
On the rear end frame 11 of the generator,
A pole is electrically connected to the output terminal 20 side of the generator, which is insulated using the insulating bush 13, and to the rear end frame 11 side of the generator, by tightening the nut 12 or the like.

In the voltage regulator having the above configuration, as shown in FIG. 1, the noise killer capacitor is directly attached to a portion of the generator, and directly functions as a component of the generator. Therefore, the noise killer capacitor itself must be sufficiently protected against environmental conditions such as vibration, moisture, oil, etc., which inevitably increases the cost and size of the capacitor.

In addition, although not for noise killers, there are also capacitors that are molded together with IC packages.
This is shown in Utility Model Application Publication No. 164411/1983.

[Problem to be solved by the invention]

However, in the latter type of conventional capacitors mentioned above, measures are taken to protect the capacitor from environmental conditions, but for this reason, the IC package has to be protected so that it does not break even when molded. I need to let it happen. Therefore,
Another problem with IC packages is that they are at a thermal disadvantage.

Another problem was that since the IC package was also molded, the amount of synthetic resin increased.

An object of the present invention is to reliably fix a lid to a storage case while achieving a cooling effect on a semiconductor functional element and downsizing a noise killer surge absorption element.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a semiconductor voltage regulator 1 for adjusting the output voltage of a vehicle alternator, which includes a storage case 3 and a lid 4 covering an opening of the storage case. and a voltage regulator having a configuration in which a semiconductor functional element 6 is housed inside the case, and a gel-like filler 9 is filled inside the case housing the semiconductor functional element, A storage section A that is provided on the outer surface of the lid and has a box-like shape with open sides, and a noise killer capacitor that is stored in this storage section and is not subjected to any environmental protection treatment. a surge absorbing element 2 including a surge absorbing element 2, and a pair of electrodes 2a, 2 that measure electrical continuity with the surge absorbing element and protrude from the housing part.
b; a synthetic resin 10 that fills the inside of the storage section to encapsulate and fix the surge absorbing element; and a pair of external connection terminals 3a and 3b fixed to the storage case. In the voltage regulator, the lid is bonded to the storage case, and the pair of electrodes are connected to the pair of external connection terminals.

[Effect]

The semiconductor functional device is stored in a storage case, filled with a gel-like filler inside the case, and protected by covering the case with a lid. In addition, by fixing the noise killer capacitor to the housing part of the lid, it can be placed extremely close to the semiconductor functional element, and the pair of electrodes of this capacitor can be
By connecting to the pair of external connection terminals on the case, the lid can be securely fixed to the case.

〔Effect of the invention〕

As described above, in the present invention, the surge absorbing element itself does not need to be subjected to environmental treatment, so it can be made smaller and less expensive. Furthermore, since the above-mentioned surge absorbing element is housed in a housing provided in the lid of the case, it can necessarily be placed in a position extremely close to the semiconductor functional element of the semiconductor voltage regulator. Therefore, surge and noise can be effectively absorbed.

In addition, from the standpoint that only the surge absorbing element needs to be sealed with synthetic resin, other components of the semiconductor voltage regulator are not filled with synthetic resin in order to improve their cooling effect. It is also possible to reduce the amount of synthetic resin used.

Furthermore, since the capacitor is fixed on the outer surface of the case lid, when connecting the pair of electrodes of the capacitor to the pair of external connection terminals provided on the case, it also serves as a means of fixing the lid to the case. Another advantage is that it can be done reliably.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, the same or similar elements or parts are indicated by the same reference numerals in the accompanying drawings.

An embodiment of the present invention is shown in FIGS. 2 and 3.

Noise killer capacitor 2 is connected to voltage regulator 1
The voltage regulator 1 is housed in a box part A which is a storage part provided on a part of the outer surface of the resin lid 4 which forms a part of the case 3 of the voltage regulator 1. As shown in FIG. 3, this box section A has an open side surface, and a pair of electrodes 2-a and 2- of the noise killer capacitor 2 are connected from the box section A through this side surface.
b stands out. In addition, since the noise killer capacitor 2 has not been subjected to external environmental treatment, the capacitor 2 is housed in the box part A, and epoxy resin or the like is applied around the element of the noise killer capacitor 2 for environmental protection. The synthetic resin 10 containing the resin is filled. Then, the capacitor 2 is fixed inside the box part A.

The case 3 has a functional terminal 3-a that leads the electrode to the outside,
It has a resin molded terminal support part in which parts 3-b, 3-c, etc. are insert-molded. Note that 3-a among the functional terminals is connected to the rectified output terminal of the generator (not shown).
3-b is connected to the rectified output ground terminal. Further, the case 3 is further bonded to a heat sink 15 at the C portion using silicone rubber or epoxy resin, and a thick film substrate 6 containing functional elements is bonded to the inner wall of the heat sink 15 using silicone rubber 5 or the like. The terminal 8 of the element and the electrode 3 of the case, for example.
A nickel wire 7 is welded to -a, and the internal electrode is electrically connected to the external electrode. 9 is a filler containing silicone gel or the like for protecting the functional elements.

Then, the lid 4 is bonded or ultrasonically welded to the case 3 at a portion B. At this time, the electrodes 2-a and 2-b of the capacitor 2 fixed to the lid 4 are
Functional terminals 3-a and 3 of the voltage regulator 1, respectively.
- electrically connected to b. This connection allows the lid 4 and the case 3 to be fixed more reliably, and the thick film substrate 6 can be reliably protected by the lid 4.

Further, the thick film substrate 6 is simply a gale-like filler 9.
The cooling effect can be improved along with the effect of the heat sink 15. Reference numeral 16 indicates a mounting hole provided in a part of the case 3 for mounting the voltage regulator 1 to the generator.

The fourth figure shows a state in which the voltage regulator according to the present invention is attached to an alternating current generator used in a vehicle or the like. In the alternator shown in FIG. 4, 11 is a rear end frame, 63 is a front end frame, 64 is a stator, and 65 is a rotor. Reference numeral 67 indicates a brush holder, and reference numeral 66 indicates a rear cover, both of which are attached to the rear end frame 1 described above.
It is fixed at 1. The voltage regulator 1 is fixed to a portion of the rear end frame 11 and covered by the rear cover 66. Connection to an external electric circuit is made via connection terminal 3-c.

Note that in the above embodiment, a capacitor was used as a noise killer element.
Electronic components that act as a noise killer are not limited to capacitors; for example, varistors with p-n junctions, diodes, etc. may also be used.
It may be a nonlinear characteristic element such as a varistor whose main component is ZnO, or it may be a component using a combination of the above elements.

[Brief explanation of drawings]

FIG. 1 is an external view showing the mounting position of a conventional noise killer capacitor. FIG. 2 is a front view of a voltage regulator according to an embodiment of the present invention. Figure 3 is the second
1 is a side sectional view of the voltage regulator according to the invention shown in the figure; FIG. FIG. 4 is an overall sectional view of a generator equipped with a voltage regulator according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Voltage regulator, 2... Noise killer capacitor, 2a, 2b... A pair of electrodes, 3... Case, 3a, 3b... A pair of external connection terminals, 4...
...Lid, 6...Thick film substrate forming a semiconductor functional element, 9
...Gel-like filler, 10...Synthetic resin, A...
The box part that forms the storage part.

Claims (1)

[Scope of Claims] 1. A semiconductor voltage regulator 1 for adjusting the output voltage of a vehicle alternator, comprising a storage case 3 and a lid 4 covering an opening of the storage case, In a voltage regulator having a configuration in which a semiconductor functional element 6 is housed inside a case, and a gel-like filler 9 is filled inside the case housing the semiconductor functional element, on the outer surface of the lid. A storage section A having a box-like shape with open sides, and a surge absorption element including a noise killer capacitor that is housed in this storage section and has not been subjected to environmental protection treatment. 2, and a pair of electrodes 2a, 2 that measure electrical continuity with this surge absorbing element and protrude from the housing part.
b; a synthetic resin 10 that fills the inside of the storage section to encapsulate and fix the surge absorbing element; and a pair of external connection terminals 3a and 3b fixed to the storage case. . A voltage regulator, wherein the lid is adhered to the storage case, and the pair of electrodes are connected to the pair of external connection terminals.