CN204179931U - A kind of power born of the same parents structure adopting heat pipe self-cold radiating - Google Patents

Abstract

The utility model provides a power cell structure in which a heat pipe self-cools and dissipates heat. The power cell structure in which the heat pipe is self-cooling and dissipating heat includes a hollow shell at the rear, and a radiator, a plurality of capacitors, and power components are arranged in the shell, and it is characterized in that: the radiator is arranged in parallel on the shell Composed of multiple heat pipe radiators in the body; the number of the power elements is equal to the number of heat pipe radiators, and they are installed above each heat pipe radiator; the plurality of capacitors are arranged between the power elements and the heat pipe radiators It is connected to multiple power components through composite busbars; multiple air inlets are opened on the front baffle of the housing. During the heat dissipation process of the utility model, the heat is discharged from the outside of the shell through the working principle of the heat pipe to realize heat exchange. Because the heat pipe radiator relies on the evaporation and condensation of its own cooling liquid to bring out heat, no fan or other external heat dissipation factors are required to achieve good isothermal performance. , Free of equipment maintenance, can achieve high-quality heat dissipation and convenient installation.

Description

A power cell structure using heat pipe self-cooling and heat dissipation

technical field

The utility model belongs to the field of power electronic transformers and converters, and relates to a design of a power cell, in particular to a structural design of a power cell adopting a heat pipe self-cooling and heat dissipation method.

Background technique

Power electronic transformer (power electronic transformer, PET), also known as solid transformer (solid transformer), is a new type of transformer that realizes power system voltage conversion and energy transfer through power electronic technology. Compared with traditional transformers, power electronic transformers have the following advantages: (1) Small size, light weight, and less environmental pollution; (2) The output voltage of the secondary side is constant during operation, does not change with the load, and is smooth and adjustable; (3) ) The primary and secondary side voltages are sinusoidal waveforms, and the power factor is adjustable; (4) The primary and secondary side voltage, current and power are highly controllable; (5) It has the function of a circuit breaker itself, without the need for traditional transformer relays protective device;

Power electronic transformer is a frontier research topic of power system integrating power electronics, power system, computer, digital signal processing and automatic control theory. At present, there are a lot of related research and development at home and abroad. In the design and development of power electronic transformers, large-scale power electronic devices and corresponding power electronic converter technology have been widely used.

There are two main heat dissipation methods for power cells used in power electronic transformers: air cooling and water cooling. The water-cooled heat dissipation system is to transfer heat through circulating water, and is composed of several parts such as heat exchanger, circulation system, water tank, water pump and deionized water. The water cooling system has a very strong heat dissipation capacity, but due to its complex structure and high maintenance costs, it is rarely used in traditional power electronic transformer systems.

Air-cooled heat dissipation is mainly to extract the heat out of the current use environment by stirring the airflow and the heat transfer of the heat sink when the fan is turned on. The system has the characteristics of simple structure, low cost, mature technology, etc. It is the main heat dissipation method used by electronic power transformers at present.

A power cell is a highly integrated power component that integrates power components (IGBT, silicon controlled rectifiers), radiators, composite busbars, and capacitors. Because its structure is similar to the cell structure of a living body, it is named a power cell. , The power cell (power component) has a series of advantages such as easy installation and use; beautiful appearance, high reliability, low overall cost, favorable for complete sets, simple design and selection, and shortened development cycle of the whole machine equipment. For the manufacture of power electronic equipment, most of the electrical connection forms of power devices can be obtained by combining power cells. The main heat source of the power cell used in the power electronic transformer is the IGBT high-frequency switching device. The heat dissipation method of the power cell of the traditional electronic power transformer is shown in Figure 1 and Figure 1-1: the power components (IGBT, etc.) are installed on the upper part of the radiator. A fan (fan) is installed at the front of the power cell, and when the fan is started, the heat generated in the power cell is agitated by the fan and discharged from the rear of the power cell. The disadvantage of this kind of power cell structure design is that the air duct needs to be closely matched, so that when the fan (fan) stirs the airflow, it will generate wind pressure and force the heat to be discharged out of the power cell; on the other hand, the stirring fan (fan) will carry dust from the power cell. After passing through, a large amount of dust will be deposited in the power cell. If it is not cleaned in time, it will definitely affect the components (circuit boards, etc.) in the power cell.

Contents of the invention

According to the deficiencies of the prior art, the utility model provides a power cell structure using heat pipes for self-cooling and heat dissipation. The working principle of heat pipes absorbing heat and exchanging heat is discharged outside the power cells to realize heat exchange, thereby achieving self-cooling and heat dissipation.

The technical solution provided by the utility model: the self-cooling and heat dissipation power cell structure of the heat pipe includes a hollow shell at the rear, and a radiator, a plurality of capacitors and power components are arranged in the shell, and it is characterized in that: The radiator is composed of a plurality of heat pipe radiators arranged in parallel in the casing; the number of the power elements is equal to the number of heat pipe radiators, and they are installed above each heat pipe radiator, and the number of power elements The multiple capacitors are arranged behind the power components and the heat pipe radiator, and are connected to multiple power components through a composite busbar; multiple air inlets are opened on the front baffle of the housing, and multiple air inlets The air outlet communicates with the hollow part on the rear side of the casing through the gap between the heat pipes in each heat pipe radiator to form a natural air passage.

The preferred technical solution of the utility model: there are four heat pipe radiators, and equidistant gaps are provided between two adjacent heat pipe radiators, and multiple air inlets pass through the gaps between the heat pipes in each heat pipe radiator and the two heat pipe radiators. The gap between the adjacent heat pipe radiators communicates with the hollow part on the rear side of the casing to form a natural air passage.

The preferred technical solution of the utility model: the air inlet is a strip-shaped air inlet, and a plurality of air inlets are equidistantly arranged.

The heat pipe radiator is adopted in the power cell structure described in the utility model. During the heat dissipation process, the heat is discharged from the shell through the working principle of the heat pipe to realize heat exchange, thereby achieving self-cooling heat dissipation, fast heat dissipation, and good heat dissipation effect. In the process of heat discharge, there is no traditional radiator relying on fans (fans) to force the airflow to stir. Therefore, the power cell can maintain a high IP level, and the power cell is very easy to install.

Description of drawings

Figure 1 is a schematic diagram of the structure of a traditional air-cooled power cell.

Figure 1-1 is a schematic diagram of the internal structure of a traditional air-cooled power cell.

Fig. 2 is the front schematic view of the utility model,

Fig. 3 is a schematic side view of the utility model,

Fig. 4 is the structural representation of the utility model,

Fig. 5 is a schematic diagram of the internal structure of the utility model;

Fig. 6 is the trend chart of the wind direction of the present utility model.

In the figure: 1—radiator, 2—power component, 3—capacitor, 4—composite busbar, 5—housing, 6—air inlet.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. As shown in Figure 2-4, a power cell structure with self-cooling and heat dissipation of heat pipes includes a hollowed-out housing 5 at the rear, and a plurality of strip-shaped air inlets 6 are opened on the front baffle of the housing 5, and a plurality of The strip-shaped air inlets 6 are equidistantly arranged, and may also be arranged in two rows, and a plurality of air inlets in each row are also equidistantly arranged. As shown in Figure 5, a plurality of heat pipe radiators 1, a plurality of capacitors 3 and a plurality of power elements 2 are arranged in the housing 5, and the best solution is provided with four heat pipe radiators and four power elements, and the four heat pipe radiators The radiator 1 is arranged in parallel in the housing 5 near the front baffle, four radiators 1 are fixed on one side plate of the housing 5, and the four power elements 2 are correspondingly installed above each heat pipe radiator 1 , and the four power elements 2 are connected in parallel; the plurality of capacitors 3 are arranged behind the power element 3 and the heat pipe radiator 1, and are connected to a plurality of power elements 2 through a composite busbar 4 (laminated busbar); A plurality of air inlets 6 communicate with the hollow part on the rear side of the casing through the gap between the heat pipes in each heat pipe radiator 1 and the gap between two adjacent heat pipe radiators to form a natural air passage. The work element 2 is an IGBT element.

When the utility model works, the power element 2 is generating a large amount of heat, as shown in Figure 6, the heat pipe radiator 1 installed at the bottom of the power element 2 first obtains these heat, and through the work inside the heat pipe radiator 1 (cooling medium evaporates, condenses ), conduct the heat generated by the power element 2 to the heat pipe radiator 1, and the heat pipe radiator 1 takes out the heat through its rapid heat exchange function (cooling medium evaporation, condensation), due to the relationship of negative pressure (heat discharge, The air pressure in the housing 5 is reduced), and the external air will be sucked in automatically from the air inlet 6 to form a natural wind circulation, so as to achieve the self-cooling and heat dissipation mode of the heat pipe.

Claims (3)

1. A power cell structure with heat pipe self-cooling and heat dissipation, comprising a shell (5) hollowed out at the rear, in which a heat sink (1) and a plurality of capacitors (3), power elements (2) are arranged in the shell (5) ), characterized in that: the radiator (1) is composed of a plurality of heat pipe radiators arranged in parallel in the casing (5); the number of the power elements (2) is equal to the number of heat pipe radiators , correspondingly installed above each heat pipe radiator (1), and multiple power elements (2) are connected in parallel; the multiple capacitors (3) are arranged between the power elements (2) and the heat pipe radiator (1) and connected to multiple power components (2) through a composite busbar (4); multiple air inlets (6) are opened on the front baffle of the casing (5), and multiple air inlets (6) pass through The gap between the heat pipes in each heat pipe radiator (1) communicates with the hollow part on the rear side of the casing to form a natural air passage. 2. The power cell structure of heat pipe self-cooling and heat dissipation according to claim 1, characterized in that: there are four heat pipe radiators, and there are equidistant gaps between two adjacent heat pipe radiators (1), and a plurality of The air inlet (6) communicates with the hollow part on the rear side of the casing through the gap between the heat pipes in each heat pipe radiator (1) and the gap between two adjacent heat pipe radiators to form a natural air passage. 3. The heat pipe self-cooling and heat dissipation power cell structure according to claim 1 or 2, characterized in that: the air inlet (6) is a strip-shaped air inlet, and a plurality of air inlets (6) are equidistantly arranged.