KR101674466B1 - Water cooling apparatus for IGBT element of electric locomotive - Google Patents

Water cooling apparatus for IGBT element of electric locomotive Download PDF

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Publication number
KR101674466B1
KR101674466B1 KR1020150063147A KR20150063147A KR101674466B1 KR 101674466 B1 KR101674466 B1 KR 101674466B1 KR 1020150063147 A KR1020150063147 A KR 1020150063147A KR 20150063147 A KR20150063147 A KR 20150063147A KR 101674466 B1 KR101674466 B1 KR 101674466B1
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South Korea
Prior art keywords
igbt element
flow path
igbt
electric locomotive
inlet
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KR1020150063147A
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Korean (ko)
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홍억선
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주식회사 선우테크
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The present invention relates to a water cooling device for an IGBT element of an electric locomotive, and particularly relates to an IGBT element which is provided in a converter / inverter stack of an electric locomotive and generates heat at a high temperature, The present invention relates to an apparatus for providing a flow path shape and includes a body 100 provided in a converter / inverter stack of an electric locomotive and having an inlet 110 and an outlet 120 with a flow passage 130 engraved therein, 100, and a cooling water circulating through the flow path (130), and two or more IGBT elements (300) are spaced apart from each other symmetrically on both sides of the cover (200). Sectional area of the flow path 130 is formed to be larger than the cross sectional area of the inlet 110 in the section A where the IGBT element 300 is installed to significantly increase the cooling efficiency and thereby cause the IGBT element to be damaged Thereby improving the operational stability of the electric locomotive.

Description

[0001] The present invention relates to a water cooling apparatus for an IGBT element of an electric locomotive,

The present invention relates to a water cooling apparatus for an IGBT element of an electric locomotive, and particularly relates to an IGBT element which is provided in a converter / inverter stack of an electric locomotive and generates heat at a high temperature, The present invention relates to an apparatus for providing an improved shape of an electric locomotive, which greatly increases the cooling efficiency, thereby preventing the IGBT element from being damaged by overheating, and further improving the operational stability of the electric locomotive.

Generally, a propulsion system for electric locomotives includes a converter / inverter stack consisting of a number of converters and inverters.

As a power semiconductor used in such a converter / inverter stack, a GTO (gate turn-off thyristor) semiconductor device has been widely used, but in recent years it has been replaced by an IGBT (insulated gate bipolar mode transistor) semiconductor device .

Since the GTO semiconductor device is a type of power semiconductor device and can control the power circuit on / off freely with the gate signal and has a large withstand voltage and controllable current, the PWM control VVVF inverter for induction motor drive, A breaker, a ground-type converter, and the like.

The IGBT semiconductor device is a switching device having a structure of a power MOS FET (metal oxide semi-conductor field effect transistor) and a bipolar transistor. The IGBT semiconductor device has a small driving power, high switching speed, (High current density).

In particular, the converter / inverter stack to which the IGBT element is applied has a four-parallel structure. When the IGBT element is damaged due to overheating, the operation of the electric locomotive is greatly affected , Proper cooling must be performed to prevent the IGBT element from being damaged by overheating.

Fig. 1 is a perspective view showing a water cooling device for an IGBT element of a general electric locomotive. As shown in Fig. 1, an IGBT water cooling device 20 of a general electric locomotive has four IGBT elements 10 ), And a total of four IGBT elements 10 are symmetrically assembled on both sides of two on one surface.

In the water cooling device 20, a cooling water flow path (not shown) is formed, thereby preventing the IGBT element 10 from being overheated while the cooling water circulates.

However, there is a limit to effectively cooling a limited area of the IGBT element 10 only by supplying the cooling water through the flow path having a universal shape under a predetermined hydraulic pressure and flow rate.

In order to improve the performance of the IGBT stack, IGBT stacks were fabricated by various numerical methods such as "Numerical analysis of 10kW water cooling plate heat flow for IGBT stack" (Yu Sung Yeol et al., 3th Korea Railroad Society Fall Conference, 2011) There is a problem in the prior art that it is difficult to maintain a low temperature of about 80 캜 or lower.

Yoo Sung-Yeol et al., "Numerical Analysis of 10kW Water-Cooled Plate Heat Flow for IGBT Stack", Proceedings of KSRI Fall Conference, 2011.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems and it is an object of the present invention to greatly improve the cooling efficiency by optimizing the cooling water flow path at a predetermined water pressure and flow rate with respect to a limited area provided with a plurality of IGBT elements, And to improve the stability of the operation of the electric locomotive, and to provide a water cooling device for an IGBT element of an electric locomotive.

The present invention relates to an electric locomotive, comprising a body provided with an inlet and an outlet in a converter / inverter stack of an electric locomotive engine and having a channel engraved therein, and a cover for covering the body to maintain airtightness so that cooling water circulates through the channel, A water cooling apparatus comprising two or more IGBT elements symmetrically spaced apart from each other; Sectional area of the flow path is larger than the cross-sectional area of the inlet in the section in which the IGBT element is installed, and the cross-sectional area of the flow path is maintained in the section where the IGBT element is spaced apart.

At this time, it is preferable that the flow path is formed by a plurality of reciprocating layers in a staggered shape with a unit length from the first IGBT element closest to the inlet side to the last IGBT element most distant from the first IGBT element.

In addition, it is most preferable that the flow path is convex in a section in which the IGBT element is provided for every three round trips, and a unit shape having a concave shape is formed in the spaced section.

It is preferable that the flow path is formed by the main partition wall for two minutes from the inlet to the outlet.

Finally, it is preferable that the flow path is formed by an additional two minutes by the auxiliary partition in the extended section.

As described above, the present invention greatly improves the cooling efficiency by optimizing the cooling water flow path at a predetermined water pressure and flow rate for a limited area where a plurality of IGBT elements are spaced apart, thereby preventing the IGBT element from being damaged by overheating, And further, the stability of the operation of the electric locomotive can be improved.

1 is a perspective view showing a water cooling device for an IGBT element of a general electric locomotive,
2 is an exploded perspective view showing an embodiment according to a water cooling device for an IGBT element of an electric locomotive of the present invention,
3 is a perspective view showing a body in an embodiment according to the water cooling device for an IGBT element of an electric locomotive of the present invention,
4 is a perspective view of Comparative Example 1 in contrast to the embodiment of the present invention,
5 is a graph showing the results of the heat flow analysis of Comparative Example 1,
6 is a perspective view of Comparative Example 2 in contrast to the embodiment according to the present invention,
7 is a graph showing the results of the heat flow analysis of Comparative Example 2,
8 is a perspective view of a third comparative example in contrast to the embodiment according to the present invention,
9 is a diagram showing a result of thermal flow analysis of Comparative Example 3;

FIG. 2 is an exploded perspective view showing an embodiment according to the water cooling device for an IGBT element of an electric locomotive according to the present invention. FIG. 3 is a cross- .

FIG. 4 is a perspective view of Comparative Example 1 in comparison with the embodiment of the present invention, and FIG. 5 is a diagram showing a result of thermal flow analysis of Comparative Example 1.

FIG. 6 is a perspective view of Comparative Example 2 in comparison with the embodiment of the present invention, and FIG. 7 is a diagram showing a result of thermal flow analysis of Comparative Example 2. FIG.

FIG. 8 is a perspective view of Comparative Example 3 in contrast to the embodiment of the present invention, and FIG. 9 is a diagram showing a result of heat flow analysis of Comparative Example 3.

As shown in FIGS. 2 and 3, the water cooling device for an IGBT element of an electric locomotive according to the present invention locally expands the flow path 130 to the region where the IGBT element 300 is installed, 131 and the auxiliary partition 132 are appropriately arranged so that the most efficient cooling of the IGBT element 300 can be achieved.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, the water cooling apparatus for an IGBT element of an electric locomotive according to the present invention is provided in a converter / inverter stack of an electric locomotive and has an inlet 110 and an outlet 120, And a cover 200 covering the body 100 to maintain airtightness so that cooling water is circulated through the flow path 130 and two or more IGBT elements 110 are symmetrically disposed on both sides of the body 100, (300) are spaced apart from each other; The cross sectional area of the flow path 130 is larger than the cross sectional area of the inlet 110 in the section A where the IGBT device 300 is installed, 130 has a cross sectional area of the inlet 110 and the flow path has a unit length from the first IGBT element closest to the inlet side to the last IGBT element most distant from the inlet side, And the flow path 130 is formed in a zigzag shape so as to have a convex shape in a section where the IGBT element is installed for every three round trips and to be formed in a unit shape having a concave shape in a spaced interval .

Prior to the detailed description, basically, the water cooling apparatus for the IGBT element of the electric locomotive of the present invention is provided in a converter / inverter stack constituting a power dispersive propulsion system of an electric locomotive.

First, the water cooling apparatus of the present invention comprises a body 100 and a cover 200.

Two or more IGBT elements 300 are symmetrically disposed on both sides of the water cooling apparatus so as to be spaced apart from each other.

Hereinafter, a total of four IGBT elements 300 will be described as two on both sides of a single surface as shown in FIG. 2. For example, three IGBT elements 300 on one side and a total of six IGBT elements 300 on both sides As shown in FIG.

At this time, an inlet 110 for supplying cooling water is opened in a lower left part of the figure on one side of the body 100, and an outlet 120 for discharging cooling water is opened in a right upper part of the other side of the drawing .

Of course, according to the design change of the cooling water circulation system, the inlet 110 and the outlet 120 may be formed on the upper and lower sides of the same surface, respectively.

It will be apparent that a cooling water pump or the like is added to recover the cooling water from the outlet 120 of the body 100 and cool the cooling water to supply the cooling water to the inlet 110 again.

A channel 130 is formed inside the body 100 from the inlet 110 to the outlet 120 so that the cooling water circulates inside the channel 130.

The cover 200 covering the body 100 may be formed in a simple plate shape or may be formed to be symmetrical with respect to the body 100.

Particularly, in the present invention, as shown in FIG. 3, the section A in which the IGBT element 300 is provided and the section B in which the IGBT element 300 is spaced apart are divided to change the cross- It is characterized by.

That is, in the present invention, the cross-sectional area of the flow path 130 is larger than the cross-sectional area of the inlet 110 in the section A where the IGBT device 300 is installed, B, the cross-sectional area of the channel 130 maintains the cross-sectional area of the inlet 110.

This is because the cross-sectional area of the flow path 130 is locally expanded in the section A where the IGBT element 300 is installed, so that the speed of the cooling water is temporarily reduced in this section, thereby cooling the IGBT element 300 It is to be carried out surely for a longer time.

On the other hand, in the section B where the IGBT element 300 is spaced apart, the cross-sectional area of the flow path 130 maintains the cross-sectional area of the inlet 110 at which the cooling water initially flows, The sectional area is locally reduced as compared with the installed section A.

Accordingly, in the section B where the IGBT element 300 is spaced apart, the cooling water moves at a relatively high speed, so that it can pass quickly without almost any heat exchange.

The flow path 130 has a unit length L from the first IGBT element 300 closest to the inlet 110 side to the last IGBT element 300 which is the most distant from the first IGBT element 300 closest to the inlet 110, .

For example, as shown in FIG. 3, in the case of a water cooling apparatus in which four IGBT elements 300 are provided in two on one side, the flow path 130 formed in the body 100 extends from left to right The IGBT element 300 is extended in the section A where the IGBT element 300 is installed and then reduced in the interval B in which the IGBT element 300 is spaced apart from the section A ).

As shown in the drawing, the cooling water that has moved to the unit length L from the left side to the right side in the drawing passes through the plurality of reciprocating laminar flow paths 130 in a zigzag form. The IGBT element 300 is passed through the total of 7 times.

In this way, the IGBT element 300 has the effect of densifying the extended flow path 130 in the section A where the IGBT element 300 is installed. In the section B where the IGBT element 300 is spaced apart, So that it can pass quickly.

3, the flow path 130 is convex in the section A in which the IGBT element 300 is installed for every three times, and is formed in a unit shape having a concave shape in the interval B S).

In this case, the unit shape S has a shape substantially equal to the outline of the dumbbell or the peanut. By repeatedly stacking the unit shape S, it is possible to increase the manufacturing convenience.

Also, in the present invention, it is preferable that the flow path 130 is formed in two minutes by the main partition wall 131 from the inlet 110 to the outlet.

This is to assist the flow of the cooling water more smoothly by making the primary partition wall 131 serve as a guide vane with respect to the cooling water passing through the flow path 130.

For example, when half of the cooling water introduced from the left inlet 110 in the drawing is introduced above the primary partition wall 131 and the other half is introduced below the primary partition wall 131, The cooling water moved to the right side in the drawing moves again to the left side in the drawing through the upper side.

At this time, the radius of rotation of the cooling water flowing above the primary partition wall 131 may be smaller than the radius of rotation of the cooling water introduced below the primary partition wall 131.

The difference in the radius of rotation is reversed so that the radius of rotation of the cooling water introduced above the primary partition wall 131 is lowered below the primary partition wall 131 Becomes larger than the turning radius of the introduced cooling water.

That is, in the present invention, the primary partition wall 131 alternately increases or decreases the radius of rotation of the flow path 130 arranged in a zigzag form so as to smoothly flow the cooling water.

In addition, the flow path 130 is preferably formed by an additional two minutes by the auxiliary barrier ribs 132 in the extended section, that is, in the section A where the IGBT element 300 is installed. And also serves as a guide vane, so that the cooling water in the section (A) in which the IGBT element 300 is installed is not stagnated for a long time and helps to maintain the flow continuously.

The operation of the electric locomotive according to the present invention constructed as described above will be described with respect to the operation of the water cooling device for the IGBT element. The cooling water introduced through the inlet 110 flows through the passage 130 in the section A where the IGBT element 300 is installed, The moving speed of the cooling water is locally decreased while the flow path 130 is reduced again in the interval B where the IGBT element 300 is spaced apart to locally increase the moving speed of the cooling water.

The cooling water is effectively exchanged in the section A where the IGBT element 300 is installed and the cooling of the IGBT element 300 is effectively performed. However, in the section B where the IGBT element 300 is spaced apart, It has an effect that the cooling water passes quickly almost without.

The channel 130 is repeatedly expanded and contracted with a unit length L with respect to the width of the body 100, and then repeatedly formed in a zigzag form so as to repeatedly perform the above cooling operation.

At this time, if the flow path 130 is formed with one unit shape S for each three steps, it is possible to design the flow path 130 to be more compact.

The primary partition wall 131 for forming the interior of the flow path 130 for two minutes and the auxiliary partition wall 132 for forming the interior of the flow path 130 of the section A in which the IGBT element 300 is provided for two minutes, So that the flow of the gas can be smoothly performed.

In order to verify the cooling effect of the water cooling apparatus for the IGBT element of the electric locomotive of the present invention as described above, the applicant of the present invention designed three comparative examples as compared with the embodiment of the present invention, I checked the cooling effect.

Comparative Example 1 and Comparative Example 2 are similar to the present invention except that the flow paths are not arranged in a zigzag pattern but a double curved structure is simply applied to them as shown in Figs. 4 and 6, and after passing through the left IGBT element And the flow path is formed so as to pass through the IGBT element on the right side.

The difference between Comparative Example 1 and Comparative Example 2 is the presence or absence of the elongated surface formed at the end of the double curved structure.

In Comparative Example 3, the flow passages were arranged in a zigzag pattern and the main partition and the auxiliary partition were formed, but the cross-sectional area of the flow passage was uniformly maintained from the inlet to the outlet.

The heat flow analysis was made with the water pressure of 2.5 ~ 2.6 bar and the cooling water flow rate of 14.9 ~ 15.1 ㎥ / h so that the cooling water was supplied to the water cooling system of the electric locomotive.

As a result, as shown in FIG. 5 and FIG. 7, the maximum temperature of the IGBT device was found to be the same at 83.19 ° C. in the comparative example 1 and the comparative example 2, The maximum temperature was lowered to 71.42 캜, but in the comparative example, it was confirmed that the zone where the cooling water stagnated occurs in various portions.

In contrast, in the embodiment of the present invention, it is confirmed that the flow of cooling water is relatively smooth in the entire section of the flow path 130, and that the maximum temperature of the IGBT element is also 42.1 ° C., which is significantly lower than the reference value of 80 ° C. I could.

Therefore, the water cooling device for the IGBT element of the electric locomotive of the present invention locally expands or contracts the cross-sectional area of the flow path 130 by separating the section A in which the IGBT element 300 is installed and the section B spaced apart, It is possible to effectively prevent the overheat which may occur in the IGBT element 300 by additionally providing the main barrier rib 131 and the auxiliary barrier rib 132 in addition.

The above embodiment is an example for explaining the technical idea of the present invention specifically, and the scope of the present invention is not limited to the above-mentioned drawings or embodiments.

100: Body 110: Entrance
120: outlet 130:
131 primary barrier 132 secondary barrier
200: cover 300: IGBT element

Claims (5)

And a cover provided on the converter / inverter stack of the electric locomotive, which has an inlet and an outlet together with a channel engraved therein, and a cover that covers the body and maintains airtightness so that the cooling water circulates through the channel, 1. A water cooling apparatus in which two or more IGBT elements are spaced apart from each other;
Sectional area of the flow path is larger than the cross-sectional area of the inlet in the section in which the IGBT element is installed,
Wherein the cross-sectional area of the flow path maintains the cross-sectional area of the inlet in the section where the IGBT elements are spaced apart,
Wherein the flow path is formed by a plurality of reciprocating stacks in a zigzag shape having unit lengths from the first IGBT element closest to the inlet side to the last IGBT element most distant from the first IGBT element closest to the inlet side,
Wherein the flow path is formed in a plurality of round-trip stacked layers in a staggered shape, and is formed in a unit shape having a convex shape in a section where the IGBT element is provided for every three rounds and spaced apart from each other. Water cooling device.
delete delete 2. The water cooling apparatus for an IGBT element according to claim 1, wherein the flow path is formed by two main partition walls from the inlet to the outlet.
5. The water cooling apparatus for an IGBT element of an electric locomotive according to claim 4, wherein the flow path is formed by an auxiliary partition wall for an additional two minutes in an extended section.
KR1020150063147A 2015-05-06 2015-05-06 Water cooling apparatus for IGBT element of electric locomotive KR101674466B1 (en)

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2018199427A1 (en) * 2017-04-27 2018-11-01 엘에스산전 주식회사 Power semiconductor module
KR20190101678A (en) * 2018-02-23 2019-09-02 엘에스산전 주식회사 Power semiconductor module
US10462941B2 (en) 2017-11-06 2019-10-29 Caterpillar Inc. Heat sink assembly
KR20200059496A (en) 2018-11-21 2020-05-29 현대오트론 주식회사 Cooling structure for radiate heat element
WO2022086101A1 (en) * 2020-10-20 2022-04-28 주식회사 엘지에너지솔루션 Battery disconnect unit

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199427A1 (en) * 2017-04-27 2018-11-01 엘에스산전 주식회사 Power semiconductor module
KR101926716B1 (en) * 2017-04-27 2018-12-07 엘에스산전 주식회사 Power semiconductor module
US10462941B2 (en) 2017-11-06 2019-10-29 Caterpillar Inc. Heat sink assembly
KR20190101678A (en) * 2018-02-23 2019-09-02 엘에스산전 주식회사 Power semiconductor module
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KR20200059496A (en) 2018-11-21 2020-05-29 현대오트론 주식회사 Cooling structure for radiate heat element
WO2022086101A1 (en) * 2020-10-20 2022-04-28 주식회사 엘지에너지솔루션 Battery disconnect unit

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