CN110726948B

CN110726948B - An electronic load integrated unit for testing airborne power distribution system

Info

Publication number: CN110726948B
Application number: CN201810687658.2A
Authority: CN
Inventors: 张俊; 成金涛; 邓建军; 谢云; 曾苏凡; 张先恺
Original assignee: Chengdu Aircraft Industrial Group Co Ltd
Current assignee: Chengdu Aircraft Industrial Group Co Ltd
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2024-11-12
Anticipated expiration: 2038-06-28
Also published as: CN110726948A

Abstract

The present invention discloses an electronic load unit for testing an airborne power distribution system, comprising a control component, a plurality of programmable electronic loads and a plurality of bus bars, wherein the control component is respectively connected to the plurality of programmable electronic loads for communication; the negative electrodes of the plurality of programmable electronic loads are connected in parallel and grounded through a grounding bus bar; the positive electrodes of the plurality of programmable electronic loads are respectively connected to the bus bar through a control drive unit, the plurality of bus bars are respectively connected to an output interface, and the control drive unit is respectively connected to an output interface; the plurality of bus bars are connected in sequence through the control drive unit; the present invention can meet multiple power requirements simultaneously and improve the test efficiency.

Description

Electronic load integrated unit for testing airborne power distribution system

Technical Field

The present invention relates to the field of electronic load technologies, and in particular, to a power-adjustable electronic load, and more particularly, to a high-power electronic load unit.

Background

The electronic load is designed according to the fact that electronic elements absorb electric energy and consume the electric energy, is used for testing the characteristics of products such as power supplies and the like, can simulate the load in real environments to detect the quality of the power supplies, and is widely applied to production departments, inspection departments or development departments.

The existing aircraft onboard complex power distribution system is high in power distribution circuit number, multiple channels of the power distribution system are often required to be tested simultaneously, the load power of each channel is various, the power capacity difference among the channels is large, and the requirements on electronic loads are extremely high. .

The electronic load power in the current market is relatively fixed and single, the number of channels is small, and although the power is adjustable, the test requirements of multiple channels and multiple load capacities of the existing onboard complex power distribution system cannot be met. And when the aircraft model is changed and the load power requirement is changed, the proper electronic load is required to be replaced repeatedly, the equipment cost is increased, and the testing efficiency is low.

Because the existing electronic load has single power, under the condition that the power requirement of an airborne distribution system is smaller than the power of the electronic load, the rest load power of the electronic load cannot be used for other products to be tested, and the waste of electronic load resources is caused.

And the high-power electronic load on the market is generally expensive due to the technical problems of heat dissipation and the like.

In addition, chinese patent publication No. CN202119808U, 1/2012 discloses a dc electronic load, which includes a load unit, the load unit is composed of a power semiconductor device and a sampling resistor, the drain electrode of the power semiconductor device is connected with the output end of the power source to be tested by loading, the grid electrode of the power semiconductor device is connected with an external control signal, the source electrode of the power semiconductor device is connected in series with a sampling resistor and then forms a main loop with the power source to be tested by loading, and a control loop is formed between the sampling resistor and the grid electrode of the power semiconductor device by a voltage comparator and an automatic adjusting component, so as to achieve stepless adjustment of the input voltage of the grid electrode of the power semiconductor device, simulate the load impedance characteristic. .

Disclosure of Invention

To overcome the deficiencies of the prior art, the present invention provides an electronic load unit for testing an on-board power distribution system that provides a plug and play, load capacity and channel number reconfigurable electronic load configuration.

In order to solve the technical problems, the invention adopts the following technical scheme:

An electronic load unit for testing an airborne power distribution system, which is characterized in that: the control assembly is respectively in communication connection with a plurality of program-controlled electronic loads; the cathodes of the program-controlled electronic loads are connected in parallel and grounded through a grounding bus bar; the positive poles of the program-controlled electronic loads are respectively connected with the bus bars through the control driving units, the bus bars are respectively connected with one output interface, and the control driving units are respectively connected with one output interface; the bus bars are sequentially connected through a control driving unit.

The program-controlled electronic loads are respectively connected in parallel in a step mode through bus bars.

The program control electronic load is six, and the bus bars are five.

An electronic load device for testing an airborne power distribution system, which is characterized in that: the system comprises a plurality of electronic load units, a networking control unit and a plurality of bus bars, wherein the networking control unit is respectively in communication connection with the plurality of electronic load units, and the cathodes of the plurality of electronic load units are connected in parallel and grounded through the grounding bus bars; the anodes of the electronic load units are respectively connected with the bus bars through the control driving units, the bus bars are respectively connected with a high-power output interface, and the bus bars are sequentially connected through the control driving units.

The electronic load units are respectively connected in parallel in a step mode through bus bars.

The number of the electronic load units is six, and the number of the bus bars is five.

The invention has the following advantages:

The electronic load is formed by connecting a plurality of load integrated units with a networking control unit through a bus, the electronic load power is determined by the number of the load integrated units, and the capacity expansion is convenient; the networking control unit adopts a program control mode, the electronic load power is linearly adjustable, and meanwhile, the electronic load power is uniformly distributed on each load integrated unit, so that the heat dissipation efficiency of the electronic load is higher; the load integration unit can be installed on the load integration cabinet in a drawing and disassembling mode, and the connection mode is simple, so that the electronic load can be installed and disassembled quickly; the electronic load can also meet a plurality of power requirements at the same time, and the testing efficiency is improved. Compared with the price of high-power electronic loads in the market, the electronic load cost has obvious advantages.

Drawings

Fig. 1 is a front panel view of a load integration unit.

Fig. 2 is a rear panel view of the load integration unit.

Fig. 3 is a schematic diagram of the electrical principle of the electronic load of the present invention.

Fig. 4 is a front view of the overall structure of the load integrated cabinet of the present invention.

Fig. 5 is a rear view of the overall structure of the load-integrated cabinet of the present invention.

Fig. 6 is an overall electrical schematic of a load-integrated cabinet of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples, which are conventional methods unless otherwise specified, and which are commercially available from the public.

Example 1

As shown in fig. 3, an electronic load unit for testing an onboard power distribution system comprises a control assembly 1, a plurality of program-controlled electronic loads 2 and a plurality of bus bars 3, wherein the control assembly 1 is respectively in communication connection with the program-controlled electronic loads 2; the plurality of electronic loads 2 are connected in parallel with the plurality of bus bars 3 through the control driving unit; the concrete connection mode is as follows: the cathodes of the program-controlled electronic loads 2 are connected in parallel and grounded through a grounding bus bar; the positive electrode of each program-controlled electronic load 2 is respectively connected with the bus bars 3 through the control driving unit, the bus bars 3 are respectively connected with one output interface 21, and the control driving unit is respectively connected with one output interface 21; the plurality of bus bars are sequentially connected through a control driving unit. The program-controlled electronic loads 2 are connected in parallel in a step mode through bus bars.

The program-controlled electronic load is six, and the bus bars are five.

The electronic load unit is integrated as shown in fig. 1 and 2, wherein 1 is a load control component, a control keyboard is provided for working programming and control command input, and a display device displays working parameters of each program-controlled electronic load and networking working state in the unit. 2 is the program controlled electronic load existing in the market.

Fig. 2 is a rear panel diagram of the load integration unit, 21 is an output interface, and six paths of control electronic loads (base loads) of the load integration unit are combined according to test requirements and then output in 12 paths of loads. And 22 is an output interface when the load integrated unit performs high-power load networking to the load integrated cabinet, and 23 is a high-power load networking ground interface of the load integrated unit. The 24 networking communication interfaces are communication interfaces of networking control units of the load integration cabinet when the load integration units are networked with other load integration units. And 25 is a power input interface of the load integration unit. And 26 is a power input control switch of the load integrated unit.

Fig. 3 is an electrical schematic diagram of a load integration unit, program-controlled electronic load components 1-6 are connected in parallel with bus bars 1-5 in a step mode, load power of each program-controlled electronic load component 1-6 is linearly regulated by a load control component according to test requirements, and meanwhile, on-off of relays J1-J10 is controlled by a control/driving unit to complete output of each load allocation combination of the load integration unit from a 1# 12 output interface and a networking interface. If the power of the program-controlled electronic load (base load) is 400W, the interfaces 1#, 2#, 4#, 6#, 8#, 10# respectively correspond to one program-controlled electronic load, and the power output of the program-controlled electronic load is linearly adjustable within the range of 0 to 400W. The maximum power which can be output by the 3# interface, the 5# interface, the 7# interface, the 9# interface, the 11# interface and the five interfaces is 800W, 1200W, 1600W, 2000W and 2400W respectively, and the linearity is adjustable. The ground bus bar is the common ground of the cells.

Example 2

On the basis of the electronic load unit prepared in the embodiment 1, an electronic load device for testing an onboard power distribution system is further integrated. The bus bars in this embodiment are all high power bus bars.

As shown in fig. 6, an electronic load device for testing an on-board power distribution system includes an electronic load unit integrated in embodiment 1, a networking control unit 4, and a plurality of bus bars (the bus bars here are high-power bus bars compared with embodiment 1), the electronic load unit being a plurality of electronic load units, and the electronic load unit being integrated. The networking control unit 4 is respectively in communication connection with a plurality of electronic load units, and the plurality of electronic load units are connected with a plurality of bus bars in parallel through the control driving unit, and the specific connection mode is as follows: the cathodes of the electronic load units are connected in parallel and grounded through a grounding bus bar; the positive poles of the electronic load units are respectively connected with bus bars through control driving units, each bus bar is respectively connected with one high-power output interface 51, and the bus bars are sequentially connected through the control driving units. The electronic load units are connected in parallel in a step mode through bus bars.

In this embodiment, the number of electronic load units is six, and the number of bus bars is five.

An example an electronic load device (cabinet) formed by networking electronic load units of example 1 is shown in fig. 4 and 5:

Fig. 4 is a front view of an overall structure diagram of a load integrated cabinet, 41 is a control core networking control unit with an overall configuration, and is used for completing networking control and communication monitoring of each load integrated unit, and if testing is needed, networking control with larger load demands can be completed by communicating with other load integrated cabinets. 42 are six load integration units.

Fig. 5 is a schematic diagram of the back of the whole load integrated cabinet, and 51 is a large-load power output interface 1# -5# of six load integrated units after networking. 52 is a common bus ground for the load integration cabinets. 53 is a cabinet power input interface.

Fig. 6 shows the overall electrical principle of the load integration cabinet, the load integration units 1-6 are connected in parallel with each other in a step manner by using high-power bus bars 1-5, the networking control unit controls the load power of each load integration unit 1-6 according to the test requirement, and meanwhile, the control/driving unit controls the on-off of the contactors JC 1-JC 10 to complete the load allocation combination of the load integration cabinet and output the load allocation combination from the 1# 5 output interface. If the power of the program-controlled electronic load (base load) is 400W, the interfaces 1#, 2#, 3#, 4#, 5#, the maximum power which can be output respectively are 2400W, 4800W, 9600W, 19200W, 38400W and are linearly adjustable. The ground bus bar is the common ground of the cells.

The electronic load has convenient power expansion, and the upper power limit is based on the power and the number of load integrated units connected in parallel. Meanwhile, the load integrated unit not only can be connected in parallel to form a high-power electronic load for use, but also can be used for independently supplying power, and can be used as a low-power electronic load for use, thereby meeting the requirements of different powers.

Claims

1. An electronic load integrated unit for testing an onboard power distribution system, characterized in that it comprises an electronic load unit, a networking control unit (4) and a plurality of bus bars, wherein the electronic load units are multiple, the networking control unit (4) is respectively connected to the multiple electronic load units for communication, the negative electrodes of the multiple electronic load units are connected in parallel and grounded via a grounding bus bar; the positive electrodes of the multiple electronic load units are respectively connected to the bus bar via a control drive unit, the multiple bus bars are respectively connected to a high-power output interface (51), and the multiple bus bars are sequentially connected via the control drive unit;

The electronic load unit comprises a control component (1), a plurality of programmable electronic loads (2) and a plurality of bus bars (3); the control component (1) is respectively connected to the plurality of programmable electronic loads (2) for communication; the negative electrodes of the plurality of programmable electronic loads (2) are connected in parallel and grounded via a grounding bus bar; the positive electrodes of the plurality of programmable electronic loads (2) are respectively connected to the bus bar (3) via a control drive unit; the plurality of bus bars (3) are respectively connected to an output interface (21); the control drive units are respectively connected to an output interface (21); the plurality of bus bars (3) are sequentially connected via the control drive unit;

A plurality of the program-controlled electronic loads (2) are connected in parallel in a step-by-step manner via bus bars (3);

There are six program-controlled electronic loads (2) and five bus bars (3).

2. An electronic load integrated unit for testing an airborne power distribution system according to claim 1, characterized in that a plurality of said electronic load units are connected in parallel in a step-by-step manner via bus bars.

3. The electronic load integrated unit for testing an airborne power distribution system according to claim 1, characterized in that there are six electronic load units and five bus bars.