JPS593861B2 - Rectifier with voltage regulator for automobiles - Google Patents

Description

[Detailed Description of the Invention] The present invention converts alternating current voltage from a generator in a vehicle such as an automobile or two-wheeled vehicle to direct current, stabilizing battery charging and power supply to lamps such as headlamps and tail lamps, and preventing overcurrent. This invention relates to a rectifier with a voltage regulator used to prevent wire breakage caused by.

BACKGROUND ART Conventionally used rectifiers with voltage regulators of this type are known to have a configuration in which a rectifying section and a voltage regulating section are housed in the same case.

The only electrical connection means that can be taken out of the case from each part housed in the case is a relatively short lead wire, and the lead wire must be connected to an external lead wire. There is. 5 With this configuration,
When using it, the case itself must be fixed in a specified location, requiring a certain amount of installation space on a plane, making it impossible to downsize the device used, and Solder the lead-in wires individually each time 10
The connection must be made by means such as the above, which is not only difficult to work with, but also has the drawback that incorrect wiring is likely to occur during connection, and internal components may be destroyed due to incorrect wiring.

The present invention was made in order to eliminate these various drawbacks, and its purpose is to reduce the overall size and compactness, eliminate troublesome connection work, and provide a voltage regulator for automobiles that does not cause miswiring. It is intended to provide a rectifier.

The present invention, which has been made to achieve this object, has a rectifier with a voltage regulator equipped with a plurality of connection terminals, which includes a semiconductor element for configuring a voltage regulator part and a rectifier part on the same heat dissipation block, and a passive A ceramic substrate including an element and a conductive part is mounted, the connecting terminal is a flat terminal, and a narrow connecting piece is extended at the tip 25 of the flat terminal and bent at a substantially right angle to form the connection. This is a rectifier with a voltage regulator for an automobile, characterized in that a working piece is directly soldered to a conductive part on a ceramic substrate, and when the rectifying part and the voltage regulating part are attached to the same heat dissipation block, Multiple flat terminals are soldered together to form a single device, making it smaller and more compact, and since the flat terminals are directly attached to the plug side of the connector, there are no troublesome connections or incorrect wiring. It will become.

35 Next, the present invention will be explained in more detail with reference to the illustrated embodiments. 1 is a heat radiation block, and the heat radiation block is a copper plate plated with silver or high melting point solder.

A part of this heat dissipation block is formed to protrude into a terminal shape to form a single flat terminal 2, and a plurality of semiconductor elements 3 serving as a voltage adjustment section and a rectification section are mounted on the heat dissipation block to share the heat dissipation plate. Furthermore, a ceramic substrate 4 is also attached in the same manner. A plurality of conductive parts 5 and printed resistor parts 6 are provided on the ceramic substrate, and a plurality of wires 7 are bonded between these conductive parts and the semiconductor element 3 in correspondence with each other.

For this ceramic substrate 4, the other flat terminals 8 and 9 are integrally formed with a connecting piece 8a extending from the tip thereof.
, 9a, integrally attached with solder 10, etc.
In the end, three flat terminals are taken out. The connecting pieces 8a, 9a are designed so that they are always attached in surface contact with the conductive part 5, and the terminals 8, 9 are arranged so that their surfaces are perpendicular to the surface of the heat sink 1, as shown in the figure. Even in the case where the connecting pieces 8a and 9a are extended to the tips of the terminals 8 and 9 and bent at a substantially right angle, 1 their surfaces are parallel to the surface of the conductive part 5. be.

In addition, the connecting pieces 8a and 9a have a surface width narrower than that of the flat terminals 8 and 9, and the distance between the conductive parts is the same as that between the flat terminals 8 and 9. Even if the spacing is narrower than the spacing, or if the location of the conductive portion 5 and the location of the flat terminals 8, 9 are misaligned, there will be no problem in current flow. When attaching each of the above-mentioned parts to the heat dissipation block, first set the heat dissipation block 1 on a jig made of carbon or the like, and apply high melting point solder pellets of lead/tin = 95/5 to the parts where each part needs to be attached. The semiconductor element 3 (chip), the ceramic substrate 4, the flat terminals 8 and 9, and the solder 10 are placed thereon, and these are placed in an electric furnace (
They are placed in a belt-type furnace and heated in an inert gas or reducing gas atmosphere to melt the solder and solder them into one piece.

Each part of the component can be attached to the heat dissipation block 1 at the same time only by such a soldering process.
In this case, each part can be set in an appropriate position using an assembly jig made of carbon or the like, so that the mutual positional relationship of the parts is automatically determined. Next, bonding of the wire 7 between the semiconductor element 3 and the conductive part 5 can be easily performed by using an aluminum wire as the wire 7 and performing ultrasonic bonding with an aluminum bonder. After each part is integrally attached to the heat dissipation block 1 in this way, the heat dissipation block 1 is inserted into the case 11 having a housing part, and each of the flat terminals 2, 8, 9 is attached as shown in FIG. A molding material 12 such as epoxy resin is molded in the storage part and sealed and fixed in the case 11 to form a single device.

Yes, solder pellets were used in the soldering process described above, but some or all of the semiconductor elements, ceramic substrates, and flat terminals are pre-soldered in advance, and these are set in a jig and soldered all at once. It is also possible to attach As explained above, the rectifier with voltage regulator according to the present invention has a configuration in which the voltage regulator and the rectifier are mounted on the same heat dissipation block, and a plurality of flat terminals are also mounted on the heat dissipation block and the ceramic substrate. Therefore, (a) the heat dissipation block can be shared and the overall size can be significantly reduced;
(b) Flat terminals are soldered directly to the heat dissipation block or ceramic board, so they require less installation space and can be made more compact than when connecting with a harness, etc. (c) There is no soldering in the post-process. , There is no need to clean the flux after soldering. (d) Soldering of the ceramic board and flat terminal is done at the same time as soldering to the heat dissipation block of the semiconductor chip, reducing the number of man-hours by completing one soldering process. (e) Dimensions between the heat dissipation block, the flat terminals, and each other are done when setting them on a carbon jig, etc., and soldering is done in that state, so they can be determined automatically. (F) Since the heat dissipation block and the flat terminal are integrated, it is easy to insert the heat dissipation block into the case when installing the casing.Moreover, by providing a guide on the case and inserting the heat dissipation block along the guide, the heat dissipation block can be easily inserted into the case. (g) The tip of the flat terminal has a
Since the narrow connecting piece that is soldered and fixed to the conductive part is integrally bent and extended, the flat terminal can be arranged with its surface direction perpendicular to the surface direction of the heat dissipation block. However, even if the distance between the conductive parts is narrower than the distance between the flat terminals, or even if the positions of the conductive parts and the flat terminals are misaligned, there will be problems in conducting electricity. A reliable conductive path can be formed without causing damage.

(7) The flat terminal protrudes outside and becomes the plug side of the connector, so if you prepare a connector to which this terminal will fit, you can form an electrical path by simply inserting it and connect it to the external lead-in wire. Troublesome work such as soldering can be omitted during the process, and erroneous wiring will not occur at all.

It has various excellent effects such as.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the main parts of a rectifier with voltage regulator for an automobile according to the present invention separated, Fig. 2 is a plan view of the main parts assembled, and Fig. 3 shows the main parts. Store it in the case 1
FIG. 2 is a side view of a protruding side of a flat terminal as a single device. 1... Heat dissipation block, 2, a, 9...
Flat terminal, 3... Semiconductor element of voltage adjustment section and rectification section, 4... Ceramic substrate, 5...
・Conductive part, 6...Printed resistance part, 7...
Wire, 8a, 9a... Connection piece, 10.
...Solder, 11...Case, 12...
...Mold resin.

Claims (1)

[Claims] 1. In a rectifier with a voltage regulator equipped with a plurality of connection terminals, a semiconductor element for configuring a voltage adjustment part and a rectification part, as well as a ceramic substrate including a passive element and a conductive part are mounted on the same heat dissipation block, and the said connection The terminal is a flat terminal, a narrow connecting piece is extended at the tip of the flat terminal, bent at a substantially right angle, and the connecting piece is directly soldered to the conductive part on the ceramic substrate. A rectifier with a voltage regulator for automobiles.