JPH0635668Y2 - Rectifier - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a rectifying device, and in particular, a positive side diode and a negative side diode of a plurality of diodes constituting a rectifying circuit are respectively disposed on a positive side of a heat dissipation board. The present invention relates to a rectifying device that is mounted and mounted on a heat sink that configures the above and a heat sink that configures the negative side heat dissipation substrate.

[Outline of device]

The present invention mounts the negative side diode constituting the rectifier circuit on the negative side heat sink, and
The diode on the plus side is mounted on the heat sink on the plus side, and the plus side heat sink is supported by an insulator so as to be approximately parallel to the minus side heat sink with a predetermined distance, and this insulator also prevents radio interference. The present invention relates to a rectifying device, in which a capacitor for use in a capacitor is provided, the number of parts is reduced, and wiring for the capacitor is unnecessary.

[Conventional technology]

In order to charge the battery mounted on the vehicle, the vehicle has, as disclosed in Japanese Utility Model Publication No. 51-130017,
It is equipped with an alternator and is driven by the engine. Such an alternator is the seventh
As shown in the figure, the stator coils 17, 18, and 19 are connected to each other in a star shape, and these coils 17 to 19 are connected to a full-wave rectification circuit composed of six diodes 11 to 16. The output terminal 20 is used to extract a DC output. Furthermore, output terminal 20
As disclosed in Japanese Utility Model Publication No. 60-12265, a capacitor 21 for preventing radio interference is connected between the ground and the ground side.

The full-wave rectifier composed of the six diodes 11 to 16 was mounted as shown in FIG.
That is, the three diodes 11 to 13 on the minus side are mounted on the heat sink 24 on the minus side, and the heat sink 24 on the minus side is grounded and attached to the casing 22 of the alternator via the projection 23. On the other hand, the three diodes 14 to 16 on the plus side are mounted on the heat sink 25 on the plus side, and the heat sink 25 is separated from the heat sink 24 on the minus side by a predetermined distance by an insulator 34 made of an insulating material. It was supported so that it was almost parallel.

The diodes 11 to 13 on the minus side and the diodes 14 to 16 on the plus side are connected to each other by lead wires 26 to 28, and are also connected in pairs.
The connection points of 11, 14 and the diodes 12, 15 and the diodes 13, 16 were connected to the stator coils 17 to 19 via lead wires 29 to 31, respectively. The heat sink 25 on the plus side is connected to the radio interference preventing capacitor 21 via a lead wire 32, and the capacitor 21 is grounded and mounted on the protrusion 33 of the casing of the alternator 22.

[Problems to be solved by the invention]

A drawback of such a conventional rectifier for an alternator is that the number of parts for mounting the radio interference capacitor 21 increases. Furthermore, a dedicated mounting space was required to mount this capacitor 21. In addition, the capacitor 21 and the heat sink 25 on the plus side must be connected by the lead wire 32, and not only the lead wire 32 is required, but also the number of steps for that is required.

The present invention has been made in view of such problems, and it is possible to reduce the number of parts or to omit a dedicated wiring for a capacitor for preventing radio interference, and further mount a capacitor. It is an object of the present invention to provide a rectifying device that does not require a dedicated space for

[Means for solving problems]

The present invention is a rectifying device having a diode, two heat dissipation boards, an insulating support, and a radio interference preventing capacitor, wherein the two heat dissipation boards are separated from each other by a predetermined distance by the insulating support. The negative side diode is mounted on one heat dissipation board, and the positive side diode is mounted on the other heat dissipation board, and they are connected to each other to form a rectifier circuit. The present invention relates to a rectifying device that is built into a positive side and is connected between the output side of the positive side heat dissipation board or the positive side diode and the ground side.

[Action]

Therefore, the alternating current is rectified by the rectifier circuit that is formed by connecting the negative side diode and the positive side diode, which are mounted on the corresponding heat radiating board, to the output side of the positive side heat radiating board or the positive side diode. The rectified output is taken out from between the ground side. The minus side diode and the plus side diode forming the rectifier circuit are cooled by the heat dissipation board on which they are mounted. The electric wave interference prevention capacitor absorbs the fluctuation of the voltage that causes the interference electric wave to prevent the electric wave interference.

〔Example〕

The present invention will be described below with reference to an embodiment shown in the drawings. In this embodiment, portions corresponding to those of the conventional rectifying device shown in FIGS. 7 and 8 will be described with the same reference numerals. FIG. 3 shows a rectifying device according to an embodiment of the present invention. This rectifying device constitutes a three-phase full-wave rectifying device for an alternator mounted on an automobile. One diode 11, 12, 13 and three plus side diodes 14, 15, 16 are provided. These diodes 11 to 16 are connected in the same manner as the conventional circuit shown in FIG. 7, and the output of the alternator composed of the stator coils 17, 18, and 19 is full-wave rectified and the output terminal 20 It is designed to generate DC output.

The three diodes 11 to 13 on the minus side are mounted on a heat sink 24 which constitutes a heat dissipation board on the minus side. The heat sink 24 is attached to the casing 22 of the alternator via the protrusion 23 while being grounded. On the other hand, the three diodes 14 on the plus side
Reference numeral 16 is mounted on a heat sink 25 which constitutes a heat dissipation board on the plus side. And the plus side heat sink 25 is
An insulating support or insulator 34 made of an insulating material
Are supported on the minus side heat sink 24 at a predetermined distance substantially parallel to the heat sink 25.

The positive diodes 11 and 14, which correspond to each other, the diodes 12 and 15, and the diodes 13 and 16, respectively, are lead wires.
26, 27, 28, and the connection points of these corresponding diodes are connected to the stator coils 17, 18, 19 via lead wires 29, 30, 31.

Next, the insulator 34 that supports the plus-side heat sink 25 in an insulating state will be described. One of the pair of left and right insulators 34, for example, the right insulator 34 in FIG. 3 has the right insulator 34 as shown in FIGS. 1 and 2. The main body is formed of an insulating material such as synthetic resin, and a through hole 35 is formed so as to penetrate the center thereof. Screws 36 are attached to the through holes 35 as shown in FIG. 3, and the upper and lower insulators 25, 24 are fixed to the alternator casing 22.

Furthermore, the terminal plates are respectively provided above and below this insulator 34.
37 is installed. The terminal plate 37 is adapted to be in electrical contact with the upper and lower heat sinks 25 and 24, respectively, when the insulator 34 is assembled as shown in FIG. Further, a protrusion 38 is formed on the outer peripheral surface of the insulator 34 so as to protrude to one side. Inside the protrusion 38, as shown in FIG.
It has a built-in capacitor 21 to prevent radio interference. Both electrodes of this capacitor 21 are connected to the upper and lower terminal plates 37.

Therefore, according to the rectifying device of the present embodiment, the radio interference preventing capacitor 21 is built in the insulator 34 on the right side in advance, whereby the number of parts can be reduced. That is, it is not necessary to further install a capacitor for preventing radio interference after the rectifier is assembled as shown in FIG. Further, in the capacitor 21 built in the insulator 34, this insulator 34 is the third
When assembled as shown in the figure, the electrodes above and below the terminal plate
The upper and lower heat sinks 25 and 24 are electrically connected to each other via 37, so that it is not necessary to wire the capacitor 21 by using a dedicated lead wire. Therefore, it is possible to obtain a rectifying device which is particularly easy to assemble an automobile. Further, since the capacitor 21 is built in the insulator 34, it is not necessary to mount this capacitor at another position, which is advantageous in space and can provide a compact rectifier.

The present invention has been described above with reference to the illustrated embodiment, but the present invention is not limited to the above embodiment, and various modifications can be made based on the technical idea of the present invention. For example, in the rectifying device according to the above-described embodiment, the radio interference preventing capacitor 21 is built in the protrusion 38 of the insulator 34, but instead of such a configuration, FIGS. As shown in the drawing, a groove may be formed on the outer peripheral surface of the insulator 34, and the capacitor 21 wound in a ring shape may be attached to this groove.

This capacitor 21 is configured by winding a film or the like in a groove on the outer peripheral surface of the insulator 34 in a spiral shape. Then, by connecting the electrodes of the capacitor 21 to the upper and lower terminal plates 37, respectively, the wiring can be omitted as in the above embodiment. The insulator 34 having such a capacitor 21 is mounted between the upper and lower heat sinks 25, 24 as shown in FIG. 6, for example.

For the mounting of the six diodes 11-16,
Various modifications are possible, for example by mounting the positive side diodes 14 to 16 on the lower surface of the upper heat sink 25 as shown in FIG.
˜16 may be arranged so as to face the negative diodes 11 to 13 and the corresponding diodes may be connected by the lead wires 26, 27 and 28, respectively.

[Effect of device]

As described above, the present invention provides a capacitor for preventing radio interference,
The two heat dissipation boards are integrally incorporated in an insulating support body that is separated by a predetermined distance. Therefore, according to the present invention, the electromagnetic interference prevention capacitor is integrated with the insulating support, which reduces the number of parts during assembly, or the work of connecting the electromagnetic interference prevention capacitor via the lead wire. It can be omitted. Further, a space for mounting the capacitor for preventing radio wave interference is not required, which makes it possible to make the rectifying device compact.

[Brief description of drawings]

1 is a partially cutaway front view showing an insulator of a rectifier according to an embodiment of the present invention, FIG. 2 is a perspective view of the same, and FIG. 3 is a front view of a rectifier using this insulator. 4 is a longitudinal sectional view of an insulator according to a modification, FIG. 5 is a perspective view of the same, FIG. 6 is a front view of a rectifier according to the modification, and FIG. 7 is a circuit showing a rectifier of a conventional alternator. FIG. 8 is a front view of the same rectifying device. The names of the main parts in the drawings are as follows. 11 to 13 …… Diode (minus side) 14 to 16 …… Diode (plus side) 21 …… Capacitor for electromagnetic interference 24 …… Minus side heat sink (heat dissipation board) 25 …… Plus side heat sink (heat dissipation board) 34 ... Insulator (insulating support)

Claims (1)

[Scope of utility model registration request] 1. A rectifying device having diodes (11 to 16), two heat dissipation boards (24, 25), an insulating support (34), and a radio interference preventing capacitor (21). The two heat dissipation boards (24, 25) are separated from each other by a predetermined distance by the insulating support (34), and one heat dissipation board (24).
The negative side diodes (11 to 13) are mounted on the other side, and the positive side diodes (14 to 16) are mounted on the other heat dissipation board (25), and they are connected to each other to form a rectifier circuit. (21) is an insulating support (34)
A rectifier device that is integrated into the positive side and is connected between the output side of the positive side heat dissipation board (25) or the positive side diodes (14-16) and the ground side.