KR20080057567A - Igbt stack structure of plugin form - Google Patents

Abstract

A plug-in type IGBT(Insulated Gate Bipolar Transistor) stack structure is provided to facilitate maintenance and repair by having only a structural bolt for installing a stack in a main power conversion device box structure without an electric bolt type. A central axis(31) is installed between two plates(30) in a horizontal direction. A heat pipe cooling device(39) is installed on upper parts of the plates. A plurality of heat pipes(40) are coupled onto the central axis at the same interval and connected to the heat pipe cooling device. Two freewheeling diodes(33) and two IGBTs(34) are formed between the heat pipes. A plug-in type plus bus bar(36), a minus bus bar(35), and an output bus bar(37) are formed on front surfaces of the heat pipes.

Description

IGBT stack structure of plugin form}

1 is a block diagram showing a high-speed train propulsion control device.

2 is an IGBT stack block diagram with a heat pipe cooler.

3 is a view showing a conventional IGBT stack structure.

4 is a view showing an IGBT stack structure of the present invention.

5 is a view showing a plug-in type busbar applied to the present invention.

Figure 6 is a bottom view of the IGBT stack structure of the present invention.

* Description of the symbols for the main parts of the drawings *

30: plate, 31: central axis,

32: insulation, 33: freewheeling diode,

34: IGBT, 35-37: busbar,

38: common busbar, 39: heatpipe cooler,

40: heat pipe,

The present invention relates to a large-capacity IGBT stack structure for a high-speed train propulsion control device, in particular, it is possible to improve the stable switching and vibration durability of the power semiconductor device due to the elimination of current imbalance, and to improve the reliability of the entire system, High-speed train with plug-in type that facilitates maintenance because only the structural side bolts exist for mounting the stack to the structure of the main power converter box while pursuing the form that there is no electrical side bolt type in the stack configuration. A large capacity IGBT stack structure for propulsion control devices.

As shown in FIG. 1, a propulsion control device for a high speed train is a device configured to perform power conversion by being composed of a PWM converter 1, a filter capacitor 2, and a PWM inverter 3, and a DC link voltage is DC2800V, output current is a large capacity power converter equivalent to 1000Arms.

Therefore, a power semiconductor device also uses a high voltage / high current IGBT, GTO, or IGCT to form a stack.

In particular, IGBT can only be used as PPI (Press Pack IGBT) type, which in turn causes the stack structure to be heavy, complicated, and unfavorable, and adopts heat pipe cooler The corresponding busbar design is quite important.

2 is a block diagram of an IGBT stack employing a heat pipe type cooler, in which a freewheeling diode 12 and an IGBT 11 are connected between a plurality of heat pipes 10.

3 illustrates a conventional IGBT stack structure, in which a central axis 21 is disposed in a horizontal direction between two plates 20, and insulators 22 are formed at both ends of the central axis 21. .

In addition, a plurality of heat pipes 10 connected to the heat pipe cooler 23 are coupled to the central axis 21, and two freewheeling diodes 12 and an IGBT 11 are disposed between the heat pipes 10. Is installed, the heat pipe 10 has a bolt-mounted negative bus bar 13, plus bus bar 14 and the output bus bar 15 is formed to protrude toward the front.

However, in the related art, since the negative bus bar, the positive bus bar, and the output bus bar are formed by bolt coupling, maintenance is remarkably degraded. When the device is a disk type PPI, the current flow path inside the device is uniform. It was formed in a long and short form, resulting in an unbalance of the conduction current, causing the device to burn out in the worst case.

Accordingly, the present invention for solving the problem is to combine a plurality of heat pipes connected to the heat pipe cooler at equal intervals on the central axis, and to form two freewheeling diodes and two IGBTs between the heat pipes, Plug-in type plus busbars, negative busbars and output busbars are formed on the front surface of the heatpipe, and a common busbar is formed on the backside of the heatpipe to solve the current unbalance. It is possible to improve the stable switching and vibration durability of the system, to improve the reliability of the whole system, and to install the stack on the structure of the main power converter box while pursuing a form in which there is no electrical bolt type in the stack configuration. Easy maintenance because only the structural bolts exist The aim is to provide a large-capacity IGBT stack structure for high-speed train propulsion control devices with a plug-in type.

The present invention for achieving the above object,

According to claim 1, in the high-capacity IGBT stack structure for a high-speed train propulsion control device provided with a central axis in the transverse direction between the two plates, the heat pipe cooler is installed on the upper plate, on the central axis Combining a plurality of heat pipes connected to the heat pipe cooler at equal intervals, and forming two freewheeling diodes and two IGBTs between the heat pipes, the plug-in type plus bus bar, negative bus bar and An output busbar is formed.

According to claim 2, a common bus bar for eliminating current imbalance is formed on the rear surface of the heat pipe.

According to claim 3, wherein the mounting fixing support is protruded toward the front in the front center portion of the plate.

Hereinafter, with reference to the accompanying drawings Figures 4 to 6 will be described a preferred embodiment of the present invention.

In the IGBT stack structure of the present invention, as shown in FIG. 4 (a), a central axis 31 is installed in the transverse direction between two plates 30, and a heat pipe cooler 39 is disposed on the plate 30. ) Is installed.

Then, the five heat pipes 40 connected to the heat pipe cooler 39 on the central axis 31 are coupled at equal intervals, and the two freewheeling diodes 33 and 2 are spaced between the heat pipes 40. Two IGBTs 34 are formed.

At this time, the plug-in type plus bus bar 36, the negative bus bar 35, and the output bus bar 37 are formed on the front surface of the heat pipe 40 as shown in FIG. 4 (a) (b).

The bus bars 35 to 37 are formed in a plug-in type as shown in FIG.

A common bus bar 38 is formed on the rear surface of the heat pipe 40 to eliminate current imbalance.

In the front center portion of the plate 30 as shown in Figure 4 (c) the mounting fixing support 41 protrudes toward the front to enable the connection of several stacks firmly.

The IGBT stack thus configured mainly represents one phase of a converter or inverter system, three stacks of U, V, and W for the inverter, one stack for the chopper, two stacks for the single-phase converter, In the case of a single-phase converter parallel converter, four stacks are used.

For reference, the high-speed train PWM converter & inverter is a single-phase converter parallel operation, consisting of a chopper part and an inverter part, and consists of a total of eight stacks.

According to the present invention configured as described above, it is possible to improve the stable switching and vibration durability of the power semiconductor device due to the elimination of current unbalance, to improve the reliability of the entire system, and also to the electrical configuration of the bolt in the stack configuration In pursuit of a formless form, only the structural bolts for mounting the stack to the structure of the main power converter box can be expected to facilitate maintenance.

As described above, the present invention combines a plurality of heat pipes connected to a heat pipe cooler at equal intervals on a central axis, and forms two freewheeling diodes and two IGBTs between the heat pipes, Plug-in type plus busbars, negative busbars and output busbars are formed on the front surface, and common busbars are formed on the back of the heat pipe to solve the current unbalance. Structural aspects for mounting the stack to the structure of the main power converter box while improving vibration durability, improving the reliability of the entire system, and pursuing the absence of electrical bolt types in the stack configuration. To ensure easy maintenance It can be expected the effect of providing a large capacity IGBT stack structure for driving the train control device.

Claims (3)

In the high-capacity IGBT stack structure for a high-speed train propulsion control device having a central axis in the transverse direction between the two plates, the heat pipe cooler is installed on the upper portion of the plate, Combining a plurality of heat pipes connected to the heat pipe cooler at equal intervals on the central axis, Two freewheeling diodes and two IGBTs are formed between the heat pipes, but a plug-in type positive bus bar, a negative bus bar, and an output bus bar are formed on the front surface of the heat pipe. Large capacity IGBT stack structure for control. The high-capacity IGBT stack structure for a high-speed train propulsion control device having a plug-in type according to claim 1, wherein a common bus bar is formed on a rear surface of the heat pipe to eliminate current imbalance. The high-capacity IGBT stack structure for a high-speed train propulsion control device having a plug-in type according to claim 1, wherein the mounting fixing support is formed to protrude toward the front side of the plate.

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