CN204408172U - A kind of component arrangement structure of modular power unit - Google Patents

Abstract

The utility model relates to a kind of component arrangement structure of modular power unit, and this power cell adopts upper and lower Rotating fields, and superstructure and understructure all adopt left and right symmetric design.Power cell of the present utility model adopts hierarchical design, radiator can two sides use, left-right layout, IGBT heat radiation is more evenly rationally, improve the utilance of radiator, perfect heat-dissipating, electric capacity and about IGBT evenly arrange, the performance of power cell there has also been and significantly improves, and has saved cost; Meanwhile, move on to beyond air channel by components and parts little for the caloric values such as electric capacity in air channel, ensure that ventilation is smooth and easy, radiating effect improves greatly, and temperature rise have dropped about 50%.

Description

Component arrangement structure of a modular power unit

technical field

The utility model belongs to the field of electric transmission, in particular to a component arrangement structure of a modularized power unit.

Background technique

At present, power units are often used in electric transmission devices. The capacity of the device can be increased or decreased through the series and parallel connection of power units, which improves the versatility of the power units. However, the power units in the existing electric transmission devices have The following problems: 1. The weight of the unit is too heavy, and it takes time and effort for one person to disassemble and carry it. The volume is too large, and it is inconvenient to maintain and disassemble; 2. All parts share one air duct, which has poor ventilation effect, low heat dissipation efficiency, and low power conversion rate. Low; 3. There are too many components and the cost is too high; 4. The heat sink is used on one side, and the heat dissipation efficiency is low. All components are spread out in a large area, resulting in too large a volume of the entire device.

After searching, the following published patent documents of related technologies were found:

1. A circuit layout structure (CN203521395U) for reducing the temperature rise of transistors, including a power supply, on the back of the power supply, a sealed MOSFET and peripheral chip components are fixed, and on the front of the power supply, cross-pins for heat dissipation are provided. The circuit arrangement structure of the utility model for reducing the temperature rise of the transistor increases the selectivity of the sealed MOSFET on the basis of not increasing the cost of the power supply, and effectively avoids the impact of the high temperature of the MOSFET on the surrounding components through various heat dissipation methods. Devices have an impact, improving the stability and reliability of the MOSFET itself and peripheral components.

2. An IGBT module (CN203573968U), comprising a DBC substrate; a chip, the chip comprising at least one, the chip being fixedly arranged on the upper surface of the DBC substrate; a shell, the shell covering the chip, the DBC substrate an upper part; an electrode, the electrode is fixedly arranged on the upper surface of the casing; and a lead, one end of the lead is connected to the electrode, and the other end of the lead is connected to the chip. Compared with the existing structure, the IGBT module provided by the utility model omits the structure of the base, so that the heat generated by the chip can be transmitted and dissipated only through the medium of the DBC substrate, thereby improving the heat dissipation efficiency.

3. An IGBT power module based on PCB installation (CN203554796U), including a PCB bus bar formed by covering the surface of the PCB with all copper. The PCB bus bar is equipped with IGBT components, an IGBT drive circuit, and a DC circuit composed of multiple DC capacitors connected in series and then in parallel. Capacitor banks, absorbing capacitors and voltage equalizing resistors; PCB busbars are used instead of non-inductive busbars, the production process is simple, and the volume of the power module is reduced. The design and manufacturing costs of PCB busbars are much lower than ordinary non-inductive busbars, and special processing is not required The production of equipment reduces the cost of IGBT power design changes and component changes; the PCB bus bar adopts a solder mask window design, and the surface is covered with copper, which has good thermal conductivity, flow capacity and electric field characteristics, and is easy to assemble and simplifies installation. craft.

After comparative analysis, the technical means adopted in the above-mentioned disclosed technical documents and the known prior art are all quite different from the present patent application.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a component arrangement structure of a modular power unit with small weight, light volume and high heat dissipation efficiency.

The utility model solves its technical problem and realizes by taking the following technical solutions:

A component arrangement structure of a modular power unit adopts upper and lower structures, and both the upper structure and the lower structure are symmetrically arranged.

Moreover, the lower structure includes fan bottom support, fan connection terminals, radiator bottom support, radiator, outlet busbar, wire binding board, IGBT, absorbing capacitor and drive adapter board, and the fan base is fixedly installed on the upper end of the fan bottom support. , the front end of the fan is fixed with a fan connection terminal; a radiator bottom bracket is fixed symmetrically on the left and right sides of the fan bottom bracket, a radiator is fixed on the upper end of the radiator bottom bracket, and a radiator is fixed on the front end of the radiator. Drive the adapter plate, a horizontal and horizontal wire binding plate is fixed symmetrically on the left and right sides of the radiator, and a plurality of IGBTs are evenly distributed and fixed between the wire binding plates on both sides and the outer walls on both sides of the radiator; each A snubber capacitor is fixedly connected to the upper end of each IGBT, and an outgoing busbar is fixedly connected to the lower end of each IGBT.

Moreover, the superstructure includes air ducts, laminated busbars, capacitors, and capacitor assembly covers, and a vertical air duct is fixed on the upper end of the radiator, and the fan, radiator, and air duct are installed coaxially from bottom to top; The left and right sides of the track are symmetrically installed with capacitors and the laminated busbar capacitor groups formed by the laminated busbars, and a capacitor assembly cover is symmetrically fixed outside the laminated busbar capacitor groups on the left and right sides.

Moreover, the lower end of the radiator bottom bracket is fixed in the inverter cabinet by screws, and the capacitive assembly cover is fixed in the inverter cabinet.

Moreover, the upper structure and the lower structure of the power unit are fastened by screws.

Advantage and positive effect of the present utility model are:

1. The radiator of this utility model can be used on both sides and arranged left and right. The heat dissipation of IGBT is more uniform and reasonable, which improves the utilization rate of the radiator. The heat dissipation performance is good. The cost is saved; at the same time, components with low heat generation such as capacitors are moved from the inside of the air duct to outside the air duct, ensuring smooth ventilation, greatly improving the heat dissipation effect, and reducing the temperature rise by about 50%.

2. The power unit of the utility model adopts a modular design, and the fan, radiator and capacitor components can be disassembled separately, and one person can complete the maintenance work, which saves manpower and is convenient for maintenance and transportation.

3. The power unit of the utility model adopts a layered design, and the symmetrical design makes the unit more simple, the volume is greatly reduced, the weight is reduced, and the space in the cabinet is fully saved. The number of unit parts is reduced than before, which improves the reliability and saves R&D costs 15%.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is a schematic diagram of the three-dimensional structure of the utility model.

The symbols in the drawings represent: 1 Radiator bottom bracket, 2 Fan bottom bracket, 3 Fan terminal, 4 Radiator, 5IGBT, 6 Binding board, 7 Brass stud, 8 Drive adapter board, 9 Outlet busbar, 10 Capacitor component covers, 11 air ducts, 12 stacked busbars, 13 capacitors, and 14 absorbing capacitors.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the utility model.

The component arrangement structure of a modular power unit is described in the direction shown in Figure 1. This power unit adopts upper and lower structures, and both the upper structure and the lower structure adopt a left-right symmetrical design. The specific structure is:

Lower structure: including fan bottom bracket 2, fan terminal 3, radiator bottom bracket 1, radiator 4, outgoing busbar 9, wire binding board 6, IGBT 5, absorbing capacitor 14 and drive adapter board 8, at the bottom of the fan The upper end of the bracket is fixed with a fan, and the front end of the fan is fixed with a fan terminal; a radiator bottom bracket is fixed symmetrically on the left and right sides of the fan bottom bracket, and the lower end of the radiator bottom bracket is fixed on the inverter through screws. In the cabinet, a radiator is fixedly installed on the upper end of the radiator bottom support, and a drive adapter plate is fixedly installed on the front end of the radiator through brass studs 7 .

The left and right sides of the radiator are symmetrically fixed with a horizontal and horizontal wire binding plate, and three IGBTs are evenly distributed and fixed between the wire binding plates on both sides and the outer walls on both sides of the radiator. This structure makes the radiator obtain Fully utilized, the radiator wire binding plate not only plays the role of binding wires, but also protects radiator components such as IGBTs from being collided by external forces.

The upper end of each IGBT is fixedly connected with a absorption capacitor, and the lower end of each IGBT is fixedly connected with an outgoing busbar. The lower end of the outgoing busbar extends to the lower part of the outer side of the power unit, and the lower end of the busbar is connected to the inner busbar of the inverter cabinet;

Upper structure: including air duct 11, laminated busbar 12, capacitor 13, and capacitor component cover 10, a vertical air duct is fixed on the upper end of the radiator, and the fan, radiator and air duct are installed coaxially from bottom to top, so that This structure forms a heat dissipation mode of air intake from the bottom and air outlet from the top, which is more conducive to the heat dissipation of the power unit;

The left and right sides of the air duct are symmetrically fixed with capacitors and stacked busbar capacitor groups formed by stacked busbars, and a capacitor component cover is symmetrically fixed outside the stacked busbar capacitor groups on the left and right sides, and the capacitor component cover is used It is used to protect capacitors and stacked busbars, and is fixed in the inverter cabinet through the screws on the capacitor component cover to support the upper layer;

The upper structure and the lower structure of the power unit are fastened by screws, loosen the fastening screws and can be disassembled for maintenance separately; Inside the cabinet.

Assembly steps for this structure:

(1) First, install the bottom bracket of the radiator symmetrically on the left and right sides of the fan bottom bracket to form a radiator bottom bracket, fix the heavier radiator on the radiator bottom bracket below, and connect the fan terminal through π The type guide rail is installed at the front end of the fan bottom bracket, the fan is fixed on the fan bottom bracket, and the air outlet direction is directly facing the lower end of the radiator;

(2) Fix the IGBT, brass studs, binding boards, and drive adapter boards on the outside of the radiator in sequence, and fix the air duct on the upper end of the radiator, adopting the heat dissipation principle of the bottom air inlet and top air outlet, better Achieved the effect of ventilation and heat dissipation;

(3) Fix the stacked busbars and capacitors on the cover of the capacitor component, and 0.45mm insulating paper is sandwiched between the stacked busbars to ensure the insulation distance, and the two sets of capacitor component covers are symmetrically fixed on both sides of the air duct, and the stacked busbars are discharged The line is connected to the IBGT, and the six absorption capacitors are respectively installed on the upper ends of the six IGBTs;

(4) Finally, install the power unit inside the inverter cabinet, and fix it on the inverter cabinet by means of the capacitive component covers on the left and right sides and the fixing holes on the left and right bottom brackets of the radiator.

The left and right bottom brackets of the radiator, IGBT, binding boards, outgoing busbars, capacitor component covers, laminated busbars, capacitors, and absorbing capacitors are all symmetrically installed on the left and right, and are designed in layers from bottom to top. The fan and radiator are installed on the At the bottom of the power unit, the stacked busbar capacitor assembly and air duct are placed on the upper part of the power unit.

Although the embodiments and drawings of the utility model are disclosed for the purpose of illustration, those skilled in the art can understand that various replacements, changes and modifications can be made without departing from the spirit and scope of the utility model and the appended claims. It is possible, therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (3)

1. a component arrangement structure for modular power unit, is characterized in that: adopt upper and lower Rotating fields, and superstructure and understructure are and are symmetrical set;

Described understructure comprises blower fan collet, blower fan binding post, radiator collet, radiator, outgoing line busbar, Binding strap, IGBT, Absorption Capacitance and drives keyset, be fixed with blower fan in blower fan collet upper end, the front end of this blower fan is fixed with blower fan binding post; A radiator collet is fixed with in the equal symmetry of the arranged on left and right sides of blower fan collet, radiator collet upper end is fixed with a radiator, this radiator front end is fixed with a driving keyset, the equal symmetry in the left and right sides of radiator is fixed with the Binding strap of a horizontal cross setting, is fixed with multiple IGBT uniformly at intervals between the Binding strap in both sides and radiator both sides outer wall; Each IGBT upper end is all connected with an Absorption Capacitance, and each IGBT lower end is all connected with an outgoing line busbar;

Described superstructure comprises air channel, laminated bus bar, electric capacity, capacitance component outer cover, and end is fixed with vertical air channel on a heat sink, and blower fan, radiator and air channel are coaxially installed from bottom to top successively; Be fixed with the laminated bus bar capacitance group of electric capacity and laminated bus bar formation in the equal symmetry in the left and right sides in air channel, the outside all symmetries of the laminated bus bar capacitance group in the left and right sides are fixed with a capacitance component outer cover.

2. the component arrangement structure of modular power unit according to claim 1, is characterized in that: described radiator collet lower end is packed in inverter cabinet by screw, and capacitance component outer cover is fixed in inverter cabinet.

3. the component arrangement structure of modular power unit according to claim 1, is characterized in that: by screw fastening between described power cell superstructure and understructure.