JPH02194597A - Cooling device of semiconductor converting device for vehicle - Google Patents

Abstract

PURPOSE:To easily maintain and inspect a stack and to make a wind channel simpler in structure so that peripheral electric apparatuses other than the stack can be improved by installing the wind channel which connects the lower end of a cooling fin and air suction port and is provided with an air blower along the lower surface of a box body and leading the cooling air passing through the cooling fin to an air discharge port through the upper layer area of the box body where the peripheral electric apparatuses are positioned. CONSTITUTION:To a box body 1 provided below the floor of the car body 21 of a vehicle, an air suction port 6 and air discharge port 7 are respectively provided in the front face 11 on the vehicle side 22 and in the rear face 12 opposite to the front face 11. The stack of a semiconductor converting device and its peripheral control circuit parts 4a are arranged on the vehicle side at the central part of the box body 1. The member of the port 6 can be removed from the chasis for inspection. The cooling fin 23 used for cooling the stack 4 is provided on the rear side of the stack 4, with the fin 23 being oriented in the vertical direction, so that cooling air can be made to flow upward. A wind channel 24 is installed along the lower surface of the box body 1 so as to utilize the box body and an air blower 2 for supplying cooling air is provided between the fin 23 and channel 24.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the cooling of semiconductor conversion devices (rectifiers, inverters, choppers, etc.) mounted under the floor of a railway vehicle, particularly on the vehicle side. This pertains to devices that have an air intake port on the side (surface).

[Conventional technology]

Figure 2 is a sectional view of the conventional example seen from above, and is
No. 3-209112. A wind cylinder 3 connected to an axial blower 2 directly connected to an electric motor is housed in a box 1 oriented in the longitudinal direction 10 of the vehicle. Stack 4 is installed.

The front surface 11 of the box body 1 faces one of the vehicle sides (both sides of the vehicle), and the filter 5 is installed in the front air port 6I of this front surface 11 and the back surface air port 62 of the back surface 12 on the opposite side. Installed. The cooling air flows through each air port 6 connected in parallel.
1.62 is sucked in by blower 2 and stack 4
is cooled and discharged from the exhaust lower provided on the back surface 12.

In order to adjust the amount of cooling air, an easily removable closing plate 8 is provided on the exhaust lower.

In order to facilitate maintenance and inspection, the front side 11 of the semiconductor conversion device box 1 is placed close to the vehicle side, and the back side 12 is placed near the center line of the vehicle. 1
For example, two semiconductor conversion devices may be provided in pairs.

[Problem to be solved by the invention]

In the conventional example described above, the wind cylinder 3 is directed in the traveling direction 10 of the vehicle.
A large number of stacks 4 of semiconductor conversion devices can be arranged in the device, and if the blower 2 is made large, the semiconductor conversion devices can be cooled well. Therefore, it is suitable for a large capacity main power source of a vehicle, for example.

However, among the stacks 4, maintenance and inspection of the stack 4 on the front side 11 on the vehicle side is easy to perform maintenance and inspection from the front 11, but maintenance and inspection of the stack 4 on the back side 12 is difficult, and It is an independent member from the body 3, and each needs to be manufactured and assembled separately.

Further, there is a problem in that the cooling of other electric machines (not shown) inside the box 1 and outside the wind cylinder 3 is not only natural cooling, but also that the cooling is rather poor even though they are inside the box 1.

An object of the present invention is to provide a cooling device for a semiconductor conversion device for a vehicle, in which the stack is easy to maintain and inspect, the structure of the wind cylinder is simple, and the cooling of peripheral electrical equipment other than the stack, such as transformers and reactors, can be improved. It is in.

[Means to solve the problem]

The cooling device for a semiconductor converter for a vehicle according to the present invention is provided under the floor of a vehicle to house the semiconductor converter and its peripheral electric equipment, with the intake port facing the vehicle side and the exhaust port facing the opposite side of the vehicle. Cooling fins that are open on each side and that cool a stack of semiconductor conversion devices are oriented vertically, and the stack is placed on the car side of the center of the box body and the cooling fins are placed on the opposite side. A wind cylinder connected to the lower end of the cooling fin and the intake port and provided with a blower is provided along the lower surface of the box body,
Cooling air that hits the cooling fins is guided to the exhaust port through the upper region of the box body where the peripheral electrical equipment is located.

[Function] The cooling air passage by the blower is shaped like a crank, and the cooling air flows through the upper region of the box, where air warmed by heat generated by peripheral electric equipment such as transformers and reactors rises. Peripheral electrical equipment that does not generate a large amount of heat can be sufficiently cooled without the need for a special wind cylinder.

Since the cooling air guided by the wind barrel along the lower surface of the box body flows through the cooling fins from the bottom to the top, it inevitably flows through the upper region toward the air outlet.

Since the wind barrel runs along the bottom surface of the box body, the bottom surface of the box body can be made a part of the wind barrel, and the structure is simple.

Generally, most of the parts that are stored in a box installed under the floor of a vehicle avoid the bottom surface of the box where dust and rainwater can accumulate, so the wind cylinder makes effective use of the volume of the box. Less likely to interfere with other parts.

The stack and its surrounding control circuit components, which are placed on the car side of the center of the box, can be easily maintained and inspected from the front.
The cooling fins and peripheral electrical equipment on the back side require relatively less frequent maintenance and inspection, making this an appropriate arrangement for maintenance.

〔Example〕

FIG. 1 is a sectional view of the embodiment as viewed in the direction of travel of the vehicle.

A box body 1 provided under the floor of a vehicle body 21 has an air intake port 6 on a front surface 11 facing a vehicle side 22, and an exhaust lower opening on a back surface 12 on the opposite side. A stack 4 of semiconductor conversion devices and its peripheral control circuit components 4a are arranged on the car side of the central part of the box 1, and the members of the intake port 6 can be removed and inspected. Cooling fins 23 of a cooling body made of extrusion molded aluminum alloy or the like that cool this stack 4 are arranged on the back side of the stack 4, and the direction of the fins is oriented upward and downward so that cooling air can pass from the bottom to the top. do.

The wind cylinder 24 connects the air intake port 6 and the lower end of the cooling fin 23 using the box body along the lower surface of the box body 1. It is preferable that the air intake port 6 of the wind barrel 24 is integrally constructed with the air intake port 6, and can be connected to the lower surface of the box body 1 separately. A blower 2 for cooling ventilation is interposed between the cooling fins 23 and the wind barrel 24. The blower 2 may be located in the middle of the wind cylinder 24, although the structure is somewhat complicated.

In the upper region 25 of the box body 1, between the upper end of the cooling fin and the exhaust lower, the upper part of a peripheral electric machine 26 that generates less heat relative to the stack 4, such as a transformer or a reactor, is located. Place and install it as shown. A suitable guide 29 may be provided between the upper region 25 and the cooling fin 23 with the snubber resistor 28 arranged thereon.

The structure of the above embodiment has the effect described in the section (Function) and is suitable for an auxiliary power supply device or the like.

〔Effect of the invention〕

The cooling device for a semiconductor converter for a vehicle according to the present invention is provided under the floor of a vehicle and houses the semi-donor converter and its peripheral electrical equipment. The cooling fins which are opened on opposite sides of the case and which cool the stack of the semiconductor converter 1 are oriented in the vertical direction, and the stack is placed on the car side of the central part of the box body, and the cooling fins are placed on the opposite side. a wind cylinder is provided along the lower surface of the box body, the lower end of the cooling fin is connected to the air intake port, and a blower is provided.
Since the cooling air passing through the cooling fins is guided to the air outlet through the upper region of the box body where the peripheral electrical equipment is located, the cooling air path has a crank shape and generates a relatively large amount of heat. This has the effect of allowing peripheral electrical equipment such as transformers and reactances with low energy consumption to be cooled by using the cooling air from the stack, which is the main heating element, without the need for special ducts. Because it uses the bottom surface of the box, it has a simple structure and does not interfere with the installation of other parts, making it convenient in terms of materials and space.

In order to modify the cooling of the peripheral electric equipment and simplify the wind cylinder, it is necessary to direct the cooling air inside the cooling fins from the bottom to the top. This leads to the effect that maintenance and inspection can be easily performed from the front side.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the embodiment as seen in the direction of travel of the vehicle;
FIG. 2 is a sectional view of the conventional example viewed from above. 1...Box body, 2...Blower @ machine, 3.24...Wind barrel, 4...Stack, 6...Intake port, 7...Exhaust port, 11...Front , 12...Back side, 22...Car side,
23... Cooling fin, 25... Upper layer area, 6... Peripheral electrical equipment. Figure 1 Figure 2

Claims (1)

[Claims] 1) A box body that is installed under the floor of the vehicle to house the semiconductor conversion device and its peripheral electrical equipment has an intake port on the side of the vehicle and an exhaust port on the side opposite to the car side to form a stack of semiconductor conversion devices. The cooling fins for cooling the engine are oriented vertically, the stack is placed on the car side of the center of the box body, the cooling fins are placed on the opposite side, and the lower end of this cooling fin is connected to the air intake port. A wind barrel equipped with a blower is provided along the lower surface of the box body, and the cooling air passing through the cooling fins is guided to the air exhaust port through an upper region of the box body where the peripheral electrical equipment is located. Cooling device for vehicle semiconductor conversion device featuring features.