JP2735961B2 - DC-DC converter module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC-DC converter module, and more particularly, to a module in which a power conversion portion of a DC-DC converter is integrated with an electric insulating material, and a heat-radiating cover. A large-current power supply device is constituted by connecting a plurality of power supplies in parallel in a case.

[0002]

2. Description of the Related Art Conventionally, various proposals have been made for this type of DC-DC converter, for example, as shown in FIGS.
As shown in the figure, there is known a module in which a power conversion portion of a DC-DC converter is integrated with an electrically insulating material having good heat conductivity. That is, in FIG. 7, 1 is D
C-DC converter, 2 is input side DC power supply, 3 is DC-
The primary side switching circuit of the DC converter 1, 4 is a conversion transformer including a transformer or the like, 5 is an output rectifier circuit, 6 is an output smoothing circuit, 7 is an output side DC power supply, and 8 is a control circuit. A primary substrate 9 on which the primary-side switching circuits 3 are integrated, an output rectifier circuit 5 and an output smoothing circuit 6
As shown in FIG. 8, the secondary substrate 10 in which the secondary rectifier circuit is integrated and the conversion transformer 4 are integrated with the control circuit 8 using an electrically insulating material.
1. DC with DC output terminal 12 and control terminal 13
A DC converter module 14 is configured.

However, the above-described conventional DC-DC
The converter module generates a large amount of heat from the primary board, the secondary board, the conversion transformer, etc., and has a problem that this heat affects the function of each element. Means such as cooling with a cool cooling wind are required, but there are problems such as an increase in equipment size and an increase in manufacturing cost. In addition, the DC input terminal, DC output terminal, control terminal, and the like, which are provided at the end of the module, are pin-shaped to facilitate mounting on a printed circuit board or the like. There has been a problem that the stress applied to the terminal is large and the terminal may be broken by vibration or impact. Further, as a power supply device consuming a large amount of current, a plurality of DC-DC converter modules are connected in parallel, so that the heat dissipation measures and the anti-vibration measures of the pin terminals provided by the heat sink added to each module become complicated and large, and the size becomes large. In addition, there is a problem that the radiation noise generated from each module increases.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure capable of effectively dissipating heat without being damaged by vibration or impact, and reducing radiation noise from a module.

[0005]

In order to achieve this object, the present invention provides a DC-DC converter in which a primary substrate, a secondary substrate, and a power conversion circuit such as a conversion transformer are integrated with an electrically insulating material.
In the converter module, the DC-DC converter module is covered with a heat radiating cover via a good thermal conductive sheet, and pin terminals protruding from a mounting surface of the module are attached to a terminal of a terminal holder mounted on an upper surface of the heat radiating cover. It is characterized by being fixed to the portion by soldering or the like. As a power supply device that consumes a large current, D
A plurality of C-DC converter modules are arranged in parallel in a heat sink integrated case.

According to the present invention, a primary substrate,
By integrating the secondary board and the power conversion circuit such as the conversion transformer into a single module with a good thermal conductive electrical insulating material, and covering it with a cover made of aluminum or the like that has a large heat dissipation function,
The heat generated from the power elements of the respective boards and the heat generated from the conversion transformer are made uniform, so that heat can be dissipated more effectively than the heat dissipation cover. Also, the pin terminals protruding from the mounting surface of the module are fixed to the screw terminal portion of the terminal holder molded of heat-resistant resin or the like by soldering or the like, so that stress applied to the pin terminals is eliminated and vibration and shock are prevented. Strength improvement. Furthermore, as a power supply device that consumes a large current, a DC-DC converter module in which a plurality of DC-DC converter modules are arranged in parallel in a heat sink integrated case,
By forcibly cooling the inside of the heat sink case from the outside, it is possible to dissipate the heat of the entire module to the outside without accumulating the heat inside, thereby facilitating thermal design, and avoiding stress between the modules, The radiation noise generated from each module can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view showing an assembly of a DC-DC converter module according to the present invention. Reference numeral 15 denotes a DC-DC converter module, 16 denotes a heat-radiating cover made of aluminum or the like having good thermal conductivity, 17 denotes a terminal holder, 18 Is a sheet having good thermal conductivity such as silicon;
Is an insulating sheet, and 20 is a heat dissipation plate made of aluminum or the like having good thermal conductivity. The above DC-DC converter module 15
Is a device in which a power conversion circuit such as a primary substrate, a secondary substrate, and a conversion transformer is integrated with an electrically insulating material having good thermal conductivity, and is already known. DC-
On the mounting surface of the DC converter module 15, pin terminals 21 such as a DC input terminal, a DC output terminal, and a control terminal are protruded. Then, as shown in FIG.
The upper surface on the pin terminal 21 side, which is the mounting surface of the DC-DC converter module 15 mounted thereon, is covered with the heat dissipation cover 16 via the sheet 18 having good thermal conductivity.
A terminal holder 17 is assembled on the upper surface of the heat dissipation cover 16 with an insulating sheet 19 interposed therebetween.
Are connected to the heat sink 20 by the fixing screws 22. Here, the terminal holder 17 is formed of a high heat resistant resin, and the terminal holder 17 is integrally formed with screw terminals 23 corresponding to the respective pin terminals 21 and capable of conducting to the corresponding pin terminals 21. After the terminal holder 17 is connected to the heat sink 20, the pin terminals 21 of the DC-DC converter module 15 and the base end 23a of the screw terminal 23 of the terminal holder 17 are fixed by soldering or the like. You. The thus assembled DC-DC converter module assembly is assembled on a predetermined heat sink, and a predetermined lead wire or a conductive plate is connected to each screw terminal 23 to form a power supply device. The DC-D according to the embodiment configured as described above
In the C converter module, heat generated from the power elements of each substrate is radiated from the heat radiating cover 16 and the heat radiating plate 20 via the heat sink, so that overheating can be prevented. Further, since each pin terminal 21 projecting from the mounting surface of the module 15 is soldered to the base end 23a of the screw terminal 23 of the terminal holder 17, stress applied to the pin terminal 21 is eliminated, and vibration, Strength against impact is improved. On the other hand, FIG. 3 is a circuit diagram of a case where a plurality of DC-DC converter modules are arranged in parallel as a power supply device consuming a large current. Attached. The heat sink integrated case 25 is a case main body 2
6 and a bottom cover 27. The case body 26 has a junction box for storing various terminals.
26a, this junction box 26
Radiation fins 26b are formed on the upper surface excluding a.
Further, breather pipes 28a and 28b for absorbing outside air are attached to the case body 26.

In the power supply device configured as described above, which consumes a large current, the heat of the entire module can be dissipated to the outside without accumulating therein, so that the thermal design is easy and each module 15 The stress between them can be avoided, and radiation noise generated from each module 15 can be reduced by being enclosed in a case.

[0009]

As described above, the DC according to the present invention is
-In the DC converter module, the power conversion circuit is integrally modularized with an electrically insulating material having good thermal conductivity,
The pin terminals, which are covered with a heat dissipation cover with a large heat dissipation function and project from the mounting surface of the module, are fixed to the screw terminals of the terminal holder molded with heat-resistant resin etc. by soldering, etc. The generated heat and the heat generated from the conversion transformer and the like can be made uniform and the heat can be dissipated more effectively than the heat dissipation cover. In addition, the stress applied to the pin terminals of the module can be eliminated, and the strength against vibration and impact can be improved. . In addition, when a plurality of DC-DC converter modules are arranged in parallel in a heat sink integrated case as a power device that consumes a large current, it is possible to dissipate the heat of the entire module to the outside without accumulating it inside. In addition, thermal design is easy, mounting stress between each module is avoided, and radiation noise generated from each module can be greatly reduced by being enclosed in a case.

[0010]

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an assembly of a DC-DC converter module according to the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a circuit diagram of a power supply device that consumes a large current;

FIG. 4 is a partially broken side view of the heat sink integrated case.

FIG. 5 is a top view of the heat sink integrated case.

FIG. 6 is a front view of the heat sink integrated case.

FIG. 7 is a block diagram of a general DC-DC converter module.

FIG. 8 is a perspective view showing a conventional DC-DC converter module.

[Explanation of symbols]

 Reference Signs List 15 DC-DC converter module 16 Heat dissipation cover 17 Terminal holder 18 Sheet 19 Insulation sheet 20 Heat sink 21 Pin terminal 22 Fixing screw 23 Screw terminal 25 Heat sink integrated case 26 Case body 26a Junction box 26b Radiation fin 28a, 28b Breather pipe

Continuation of the front page (72) Inventor Atsushi Obata 3-1-1, Hinodai, Hino-shi, Tokyo Inside the Hino Plant of Hino Motors, Ltd. (72) Kunitoshi Shimizu 3-1-1, Hinodai, Hino-shi, Tokyo Hino Motors, Ltd.Hino Plant (72) Inventor Shuichi Oi 3rd Hayakawa, Hayakawa, Nitta-cho, Nitta-gun, Gunma Prefecture Sawato Electric Co., Ltd. Nitta Plant (72) Inventor Hiroshi Fujihashi Ueno, Tokyo 4-7-301 Integran Co., Ltd. (72) Inventor Kuniharu Ogawa 4-chome, Taito-ku, Tokyo 4-6-1 6-301 Integran Co., Ltd. (72) Inventor Teiji Kumagai 4-chome, Ueno, Taito-ku, Tokyo 6-7-301 Integran Co., Ltd. (56) References Japanese Utility Model Showa 53-68963 (JP, U) Japanese Utility Model Showa 62-12253 (JP, U)

Claims (2)

(57) [Claims] A DC-D in which a power conversion circuit such as a primary substrate, a secondary substrate, and a conversion transformer is integrated with an electrically insulating material.
In the C converter module, the DC-DC converter module is covered with a heat dissipation cover via a good heat conductive sheet, and a pin terminal protruding from a mounting surface of the module is mounted on a terminal holder attached to an upper surface of the heat dissipation cover. A DC-DC converter module fixed to a terminal portion by soldering or the like. 2. A DC-DC converter module according to claim 1, wherein a plurality of said DC-DC converter modules are arranged in parallel in a heat sink integrated case to constitute a power device consuming a large current. .