A test device for DC-DC conversion power supply

Abstract

The utility model discloses a test device for a DC-DC conversion power supply, and relates to the field of power supply testing. The test device for a DC-DC conversion power supply comprises: a program-controlled DC power supply, which is used to receive control from an industrial computer and supply power to a DC-DC conversion power supply under test; and a program-controlled DC load, which is used to provide load conditions for testing, and simultaneously collect output voltage and current of the DC-DC conversion power supply under test, and feed them back to the industrial computer. Compared with the prior art, the utility model has the following beneficial effects: the utility model comprises an industrial computer, a program-controlled DC power supply, a program-controlled DC load, an oscilloscope, a high-precision power analyzer, an insulation resistance tester, and a display, and all the equipment are installed in a 19-inch standard cabinet. The test system adopts standardized, modular, and structured design ideas, so that the system has sufficient test resources, can meet the automated test requirements of the product, and the DC-DC conversion power supply test is concise.

Description

Technical Field

[0001] The utility model relates to the field of power supply testing, in particular to a testing device for a DC-DC conversion power supply. Background Art

[0002] In order to complete the factory test of DC-DC conversion power supply products, multiple DC-DC conversion power supply parameters are often tested, such as input voltage and current test; output voltage and current test insulation resistance test; power module rated voltage test and verification, etc. The existing tests are non-automated tests, the test process is cumbersome and needs to be improved. Utility Model Content

[0003] The purpose of the utility model is to provide a testing device for a DC-DC conversion power supply to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A test device for a DC-DC conversion power supply, comprising:

[0006] Program-controlled DC power supply, used to receive control from industrial computers and supply power to the DC-DC converter power supply under test;

[0007] Program-controlled DC load, used to provide load conditions for testing, and collect the output voltage and current of the DC-DC converter power supply under test, and feed back to the industrial computer;

[0008] High-precision power analyzer, used to measure the input and output voltage of the DC-DC converter power supply under test and feed it back to the industrial computer;

[0009] Oscilloscope, used to collect the peak-to-peak value of the ripple of up to two output channels of the DC-DC converter under test and feed it back to the industrial computer;

[0010] Insulation resistance tester, used to collect the insulation resistance value of the DC-DC conversion power supply under test and feed it back to the industrial computer;

[0011] Industrial computer, used to communicate with program-controlled DC power supply, program-controlled DC load, oscilloscope, high-precision power analyzer, insulation resistance tester through communication control bus, control the working status of each instrument and module power supply, and read relevant data;

[0012] Display, used to receive input data from the industrial computer and display data information;

[0013] The industrial computer is connected to the program-controlled DC power supply, the program-controlled DC load, the oscilloscope, the high-precision power analyzer, the insulation resistance tester, and the display; the program-controlled DC power supply is connected to the high-precision power analyzer and the DC-DC conversion power supply under test; the DC-DC conversion power supply under test is connected to the insulation resistance tester, the oscilloscope, and the program-controlled DC load.

[0014] As a further solution of the utility model: in the extreme input voltage test, the programmable DC power supply is connected to the high-precision power analyzer and the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

[0015] As a further solution of the utility model: in the voltage stabilization accuracy test, the programmable DC power supply is connected to the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

[0016] As a further solution of the utility model: in the load regulation rate test, the programmable DC power supply is connected to the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

[0017] As a further solution of the utility model: in the output voltage noise and ripple test, the programmable DC power supply is connected to the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to an oscilloscope and two parallel programmable DC loads, and the industrial computer is connected to the two parallel programmable DC loads, the programmable DC power supply, and the oscilloscope.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the utility model includes an industrial computer, a programmable DC power supply, a programmable DC load, an oscilloscope, a high-precision power analyzer, an insulation resistance tester, and a display. All the equipment is installed in a 19-inch standard cabinet. The test system adopts a standardized, modular, and structured design concept, so that the system has sufficient test resources to meet the automated test requirements of the product, and the DC-DC conversion power supply test is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a test device for a DC-DC conversion power supply.

[0020] Figure 2 This is a schematic diagram of the equipment structure in the extreme input voltage test.

[0021] Figure 3 This is a schematic diagram of the equipment structure used in the voltage stabilization accuracy test.

[0022] Figure 4This is a schematic diagram of the equipment structure in the load regulation test.

[0023] Figure 5 Schematic diagram of the equipment structure in the output voltage noise and ripple test. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 , a test device for a DC-DC conversion power supply, comprising:

[0026] Program-controlled DC power supply, used to receive control from industrial computers and supply power to the DC-DC converter power supply under test;

[0027] Program-controlled DC load, used to provide load conditions for testing, and collect the output voltage and current of the DC-DC converter power supply under test, and feed back to the industrial computer;

[0028] High-precision power analyzer, used to measure the input and output voltage of the DC-DC converter power supply under test and feed it back to the industrial computer;

[0029] Oscilloscope, used to collect the peak-to-peak value of the ripple of up to two output channels of the DC-DC converter under test and feed it back to the industrial computer;

[0030] Insulation resistance tester, used to collect the insulation resistance value of the DC-DC conversion power supply under test and feed it back to the industrial computer;

[0031] Industrial computer, used to communicate with program-controlled DC power supply, program-controlled DC load, oscilloscope, high-precision power analyzer, insulation resistance tester through communication control bus, control the working status of each instrument and module power supply, and read relevant data;

[0032] Display, used to receive input data from the industrial computer and display data information;

[0033] The industrial computer is connected to the program-controlled DC power supply, the program-controlled DC load, the oscilloscope, the high-precision power analyzer, the insulation resistance tester, and the display; the program-controlled DC power supply is connected to the high-precision power analyzer and the DC-DC conversion power supply under test; the DC-DC conversion power supply under test is connected to the insulation resistance tester, the oscilloscope, and the program-controlled DC load.

[0034] In a specific embodiment: the DC-DC conversion power supply test of the present application includes: input voltage and current test; output voltage and current test insulation resistance test; power module rated voltage test verification; power module rated current verification; voltage regulation test; current regulation test; cross regulation test; power output efficiency test; output voltage ripple peak-to-peak test; power startup overshoot and startup delay test; output response Vvor when input voltage jumps; recovery time tvor when input voltage jumps; output response Vvor when load jumps; recovery time tvor when load jumps. Here are some specific examples of tests.

[0035] In this example: See Figure 2 In the extreme input voltage test, the programmable DC power supply is connected to the high-precision power analyzer and the DC-DC converter power supply under test, the DC-DC converter power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

[0036] The industrial computer controls the program-controlled DC power supply to output the rated input voltage of the DC-DC conversion power supply under test through the communication control bus, and the program-controlled DC load is set to the rated load. The output voltage of the program-controlled DC power supply is set to the limit input voltage of the power supply under test, and the output voltage of the object under test is measured by querying the electronic load to see if it is normal.

[0037] In this example: See Figure 3 In the voltage regulation accuracy test, the program-controlled DC power supply is connected to the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to the program-controlled DC load, and the industrial computer is connected to the program-controlled DC power supply and the program-controlled DC load.

[0038] The voltage regulation accuracy test of the DC-DC converter power supply under test is achieved by combining the program-controlled DC power supply and the program-controlled DC load. The input voltage is adjusted to the rated voltage and the output is the rated output current. The program-controlled DC load measures the output voltage of the DC-DC converter power supply under test, and the voltage regulation accuracy is determined by comparing the measured voltage value with the expected value.

[0039] In this example: See Figure 4 (and Figure 3 In the load regulation test, the programmable DC power supply is connected to the DC-DC converter power supply under test, the DC-DC converter power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

[0040] Set the input voltage of the DC-DC converter power supply under test to the rated input voltage, set the program-controlled DC load current to full load, read the output voltage value and record it as U0. Set the input voltage of the DC-DC converter power supply under test to the rated input voltage, and record the output voltage at this time as U when the load is adjusted to the minimum. Calculate the load adjustment rate d according to the following formulaL :

[0041]

[0042] In this example: See Figure 5 In the output voltage noise and ripple test, the programmable DC power supply is connected to the DC-DC converter power supply under test, the DC-DC converter power supply under test is connected to an oscilloscope and two parallel programmable DC loads, and the industrial computer is connected to two parallel programmable DC loads, the programmable DC power supply, and the oscilloscope.

[0043] The output voltage noise and ripple test of the DC-DC converter power supply under test is achieved through the cooperation of a program-controlled DC load and an oscilloscope. The input of the program-controlled DC load is connected to the output of the DC-DC converter power supply under test. The industrial computer can query the oscilloscope through the communication bus to measure the peak-to-peak value of the ripple output of the DC power supply under test, thereby completing the output voltage noise and ripple test.

[0044] The working principle of the utility model is as follows: a program-controlled DC power supply is used to receive control from an industrial computer and supply power to a DC-DC conversion power supply under test; a program-controlled DC load is used to provide load conditions for testing, and at the same time collect the output voltage and current of the DC-DC conversion power supply under test, and feed back to the industrial computer; a high-precision power analyzer is used to measure the input and output voltages of the DC-DC conversion power supply under test, and feed back to the industrial computer; an oscilloscope is used to collect the peak-to-peak value of the ripple of at most two output channels of the DC-DC conversion power supply under test, and feed back to the industrial computer; an insulation resistance tester is used to collect the insulation resistance value of the DC-DC conversion power supply under test, and feed back to the industrial computer; the industrial computer is used to communicate with the program-controlled DC power supply, the program-controlled DC load, the oscilloscope, the high-precision power analyzer, and the insulation resistance tester through a communication control bus, control the working state of each instrument and module power supply, and read relevant data; and a display is used to receive input data from the industrial computer and display data information.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A test device for a DC-DC conversion power supply, characterized in that: The test device for DC-DC conversion power supply comprises: Program-controlled DC power supply, used to receive control from industrial computers and supply power to the DC-DC converter power supply under test; Program-controlled DC load, used to provide load conditions for testing, and collect the output voltage and current of the DC-DC converter power supply under test, and feed back to the industrial computer; High-precision power analyzer, used to measure the input and output voltage of the DC-DC converter power supply under test and feed it back to the industrial computer; Oscilloscope, used to collect the peak-to-peak value of the ripple of up to two output channels of the DC-DC converter under test and feed it back to the industrial computer; Insulation resistance tester, used to collect the insulation resistance value of the DC-DC conversion power supply under test and feed it back to the industrial computer; Industrial computer, used to communicate with program-controlled DC power supply, program-controlled DC load, oscilloscope, high-precision power analyzer, insulation resistance tester through communication control bus, control the working status of each instrument and module power supply, and read relevant data; Display, used to receive input data from the industrial computer and display data information; The industrial computer is connected to the program-controlled DC power supply, the program-controlled DC load, the oscilloscope, the high-precision power analyzer, the insulation resistance tester, and the display; the program-controlled DC power supply is connected to the high-precision power analyzer and the DC-DC conversion power supply under test; the DC-DC conversion power supply under test is connected to the insulation resistance tester, the oscilloscope, and the program-controlled DC load.

2. The testing device for a DC-DC conversion power supply according to claim 1, characterized in that: In the extreme input voltage test, the programmable DC power supply is connected to the high-precision power analyzer and the DC-DC converter power supply under test, the DC-DC converter power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

3. The testing device for a DC-DC conversion power supply according to claim 1, characterized in that: In the voltage regulation accuracy test, the programmable DC power supply is connected to the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

4. The testing device for a DC-DC conversion power supply according to claim 1 or 3, characterized in that: In the load regulation test, the programmable DC power supply is connected to the DC-DC conversion power supply under test, the DC-DC conversion power supply under test is connected to the programmable DC load, and the industrial computer is connected to the programmable DC power supply and the programmable DC load.

5. The testing device for a DC-DC conversion power supply according to claim 1, characterized in that: In the output voltage noise and ripple test, the programmable DC power supply is connected to the DC-DC converter power supply under test, the DC-DC converter power supply under test is connected to an oscilloscope and two parallel programmable DC loads, and the industrial computer is connected to two parallel programmable DC loads, the programmable DC power supply, and the oscilloscope.

Images