CN113702858B - Dynamic response testing device of switching power supply - Google Patents
Dynamic response testing device of switching power supply Download PDFInfo
- Publication number
- CN113702858B CN113702858B CN202110845267.0A CN202110845267A CN113702858B CN 113702858 B CN113702858 B CN 113702858B CN 202110845267 A CN202110845267 A CN 202110845267A CN 113702858 B CN113702858 B CN 113702858B
- Authority
- CN
- China
- Prior art keywords
- power supply
- load
- switching power
- current
- tested
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 230000004044 response Effects 0.000 title claims abstract description 62
- 230000008859 change Effects 0.000 claims description 21
- 238000013461 design Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
Abstract
The invention provides a dynamic response testing device of a switching power supply, which considers that the efficiency and the accuracy of manual testing are low. Through the device, manual operation is not needed, so that the labor cost is reduced, the test time is saved, and the efficiency and the accuracy of the dynamic response test of the switching power supply can be effectively improved.
Description
Technical Field
The invention relates to the technical field of automatic testing of switching power supplies, in particular to an automatic testing system of a switching power supply.
Background
The switching power supply is a high-frequency switching power conversion device, and has the advantages of small volume, light weight, wide voltage stabilizing range, good filtering effect and the like, and is often used as a power supply of electronic equipment. With the increase of the operating speed and the current demand of electronic devices, when the current of the electronic devices changes transiently, the output voltage of the switching power supply must be maintained within a specific tolerance range to ensure the stable operation of the circuit, so the dynamic response test of the switching power supply is particularly important.
In the prior art, the dynamic response test of the switching power supply can only be manually performed by a human, the oscilloscope is required to be manually controlled to perform the test, after the test result is obtained, the stored data is manually copied and arranged into the record table, more manpower and time are consumed, and the test efficiency and accuracy are lower.
Disclosure of Invention
The invention aims to provide a dynamic response testing device for a switching power supply, which does not need manual operation, reduces labor cost, saves testing time and can effectively improve the efficiency and accuracy of dynamic response testing of the switching power supply.
In order to solve the technical problems, the present invention provides a dynamic response testing device for a switching power supply, including:
the input end of the load module is connected with the output end of the switch power supply to be tested, and the load module is used for carrying out the change of the load current based on the threshold value of the load current and the change mode of the load current;
the output end of the power supply module is connected with the input end of the switch power supply to be tested and is used for supplying power to the switch power supply to be tested;
the input end of the acquisition module is connected with the output end of the tested switching power supply and is used for testing the output voltage value of the tested switching power supply when the load current of the load module changes;
the control module is respectively connected with the load module and the control end of the acquisition module and is used for determining a threshold value of the load current of the load module and a change mode of the load current based on a user instruction, judging whether the output voltage value of the tested switching power supply is in a preset output voltage range or not, and if yes, judging that the dynamic response of the tested switching power supply meets the requirement.
Preferably, the power module is a direct current power supply, and an output end of the direct current power supply is connected with an input end of the switch power supply to be tested and is used for supplying power to the switch power supply to be tested.
Preferably, the switch power supply to be tested is arranged on the main board;
the power module further includes:
and the PSU is used for supplying power to the tested switching power supply through the main board.
Preferably, the power supply further comprises a controllable switch, wherein a first end of the controllable switch is connected with a mains supply, a second end of the controllable switch is connected with an input end of the PSU, and a control end of the controllable switch is connected with the direct-current power supply;
the control module is also used for controlling the direct current power supply to supply power for the switch power supply to be tested or sending a closing instruction of the controllable switch to the direct current power supply;
and the direct-current power supply is also used for controlling the controllable switch to be closed after receiving a closing instruction of the controllable switch, so that the PSU supplies power for the tested switch power supply through the main board.
Preferably, the controllable switch is a relay.
Preferably, the user instruction includes an input voltage value of the tested switching power supply;
controlling the direct current power supply to supply power to the tested switching power supply, comprising:
and controlling the direct current power supply to output the input voltage value so as to supply power for the tested switching power supply.
Preferably, the acquisition module is further used for testing a load current value of the load module and displaying a waveform that an output voltage value of the tested switching power supply changes along with the load current value of the load module.
Preferably, the display module is further included; the control module is also used for controlling the display module to display a judging result of whether the dynamic response of the tested switching power supply meets the requirement.
Preferably, the user instruction further comprises a design output voltage value of the tested switching power supply;
the preset output voltage range is from 0.97 to 1.03 of the designed output voltage value of the tested switching power supply.
Preferably, the user instruction includes a full load output current value;
determining a threshold value of the load current based on a user instruction, comprising:
when the full-load output current value is smaller than a standard current threshold value, determining that a large current threshold value of the load current is 90% of the full-load output current value, and a small current threshold value is 10% of the full-load output current value;
when the full-load output current value is not smaller than a standard current threshold value, determining that a first large current threshold value of the load current is 50% of the full-load output current value, and a first small current threshold value is 0% of the full-load output current value; the second large current threshold is 100% of the full load output current value, and the second small current threshold is 50% of the full load output current value.
The invention provides a dynamic response testing device of a switching power supply, which is characterized in that a control module firstly determines a threshold value of a load current of a load module and a change mode of the load current based on a user instruction, the load module can change the load current based on the threshold value of the load current and the change mode of the load current, the power module can supply power to a tested switching power supply, an acquisition module can test an output voltage value of the tested switching power supply when the load current changes, and then the control module judges whether the output voltage value is in a preset output voltage range based on the output voltage value of the tested switching power supply, so that whether the dynamic response of the tested switching power supply meets the requirement can be judged. Therefore, the control module, the load module, the power module and the acquisition module work in a mutually matched mode, the dynamic response of the switch power supply to be tested is tested, manual operation is not needed, the labor cost is reduced, the test time is saved, and the efficiency and the accuracy of the dynamic response test of the switch power supply can be effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a dynamic response testing device of a switching power supply provided by the application;
FIG. 2 is a schematic diagram of a dynamic response testing device of another switching power supply according to the present disclosure;
fig. 3 is a flow chart of a dynamic response test of a switching power supply provided in the present application.
Detailed Description
The core of the invention is to provide a dynamic response testing device of the switching power supply, which does not need manual operation, reduces labor cost, saves testing time and can effectively improve the efficiency and accuracy of the dynamic response testing of the switching power supply.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a dynamic response testing device of a switching power supply provided in the present application.
The invention provides a dynamic response testing device of a switching power supply, which comprises:
the load module 1, the input end of the load module 1 is connected with the output end of the switch power supply to be tested, is used for carrying on the change of the load current on the basis of the threshold value of the load current and change mode of the load current;
the output end of the power supply module 2 is connected with the input end of the switch power supply to be tested and is used for supplying power to the switch power supply to be tested;
the input end of the acquisition module 3 is connected with the output end of the switch power supply to be tested, and is used for testing the output voltage value of the switch power supply to be tested when the load current of the load module 1 changes;
the control module 4 is respectively connected with the control ends of the load module 1 and the acquisition module 3, and is used for determining the threshold value of the load current of the load module 1 and the change mode of the load current based on a user instruction, judging whether the output voltage value of the tested switching power supply is in a preset output voltage range, and if so, judging that the dynamic response of the tested switching power supply meets the requirement.
Considering that manual operation consumes more manpower and time and has lower testing efficiency and accuracy when testing the dynamic response of the switching power supply, in order to solve the technical problem, the application provides a dynamic response testing device of the switching power supply, which comprises a load module 1, a power module 2, an acquisition module 3 and a control module 4. Specifically, when the dynamic response testing device of the switching power supply works, the control module 4 determines a threshold value of the load current of the load module 1 and a variation mode of the load current based on a user instruction, and sends a control instruction to the load module 1. The load module 1 simulates the performance influence of different loads on the tested switching power supply, the load module 1 receives the threshold value of the load current and the change mode of the load current, and changes the load current based on the threshold value of the load current and the change mode of the load current, so that the dynamic response of the switching power supply to be tested when the load current changes dynamically is obtained later. The power supply module 2 is capable of supplying power to the switch power supply under test. After receiving the input voltage provided by the power module 2, the detected switching power supply performs dc conversion on the input voltage based on the switching frequency Fsw to obtain an output voltage, and the acquisition module 3 may test the output voltage value of the detected switching power supply when the load current of the load module 1 changes. The control module 4 reads the output voltage value of the tested switching power supply tested by the acquisition module 3, compares the output voltage value with a preset output voltage range to judge whether the output voltage value of the tested switching power supply is in the preset output voltage range, if so, judges that the dynamic response of the tested switching power supply meets the requirement, and if not, judges that the dynamic response of the tested switching power supply does not meet the requirement.
In addition, the load module 1 may obtain the threshold value of the load current and the variation of the load current through a USB-GPIB (Universal Serial-General Bus-Purpose Interface Bus, universal Serial Bus-Universal interface Bus). The control module 4 can read the output voltage value of the tested switching power supply tested by the acquisition module 3 through the USB-GPIB. Of course, the load module 1 and the control module 4, and the control module 4 and the acquisition module 3 may also communicate with each other in other manners, which are not particularly limited herein.
In addition, the load module 1 can be, but not limited to, a load instrument, and the load instrument is connected with the switch power supply to be tested through a load line, so that the load module has the advantages of flexible use, energy conservation and the like.
The acquisition module 3 may be, but is not limited to, an oscilloscope.
The power supply module 2 may be a power supply source of dc power obtained by converting commercial power, or may be a dc power supply 21 or the like, and is not particularly limited herein.
In sum, according to the dynamic response testing device of the switching power supply, the control module 4, the load module 1, the power module 2 and the acquisition module 3 are matched with each other to work, so that the dynamic response of the switching power supply to be tested is tested, manual operation is not needed, the labor cost is reduced, the testing time is saved, and the efficiency and the accuracy of the dynamic response testing of the switching power supply can be effectively improved.
Based on the above embodiments:
referring to fig. 2, fig. 2 is a schematic structural diagram of another dynamic response testing device for a switching power supply provided in the present application.
As a preferred embodiment, the power module 2 is a dc power supply 21, and an output terminal of the dc power supply 21 is connected to an input terminal of the switch power supply to be tested, so as to supply power to the switch power supply to be tested.
In order to realize the accuracy of the dynamic response test of the switching power supply, in this embodiment, the power supply module 2 may select a dc power supply 21, where the output end of the dc power supply 21 is directly connected with the input end of the to-be-tested switching power supply, and can directly apply a dc voltage to the input end of the switching power supply, so that when the load current changes, the output voltage value of the to-be-tested switching power supply is stabilized within a preset output voltage range, and the accuracy of the test is ensured.
As a preferred embodiment, the switch power supply to be tested is arranged on the main board;
the power supply module 2 further includes:
PSU22, PSU22 is used to supply power to the switch power supply under test through the motherboard.
In order to simulate the test requirement of the normal operation of the switch power supply, in this embodiment, the switch power supply to be tested is disposed on a main board, the main board is a PCB (Printed Circuit Board ) board, the power module 2 may also select PSU22 (Power Supply Unit, power supply device), during the test, the PSU22 can output a voltage to the main board, the PSU22 converts the voltage into a voltage required by the normal operation of the switch power supply to be tested by applying the output voltage to the main board, and then provides the converted voltage to the switch power supply to be tested, so as to realize the power supply to the switch power supply to be tested.
In addition, the power supply mode selection of the power supply module 2 is facilitated for the user according to actual test requirements by setting two power supply modes.
As a preferred embodiment, the device further comprises a controllable switch 23, wherein a first end of the controllable switch 23 is connected with the mains supply, a second end of the controllable switch 23 is connected with an input end of the PSU22, and a control end of the controllable switch 23 is connected with the direct-current power supply 21;
the control module 4 is further configured to control the dc power supply 21 to supply power to the switch power supply to be tested, or send a closing instruction of the controllable switch 23 to the dc power supply 21;
the direct current power supply 21 is further used for controlling the controllable switch 23 to be closed after receiving a closing instruction of the controllable switch 23, so that the PSU22 supplies power to the switch power supply to be tested through the main board.
In order to realize automatic control of the power supply module 2 to the power supply of the switch power supply to be tested, in this embodiment, the dynamic response testing device of the switch power supply further includes a controllable switch 23, a first end of the controllable switch 23 is connected with the mains supply, a second end of the controllable switch 23 is connected with an input end of the PSU22, and a control end of the controllable switch 23 is connected with the dc power supply 21. The user selects a power supply mode of the switch power supply to be tested in the control module 4, and if the power supply mode is a direct current power supply 21 mode, the control module 4 controls the direct current power supply 21 to supply power for the switch power supply to be tested; if the power supply is in the PSU22 mode, the control module 4 sends a closing instruction of the controllable switch 23 to the direct current power supply 21, and the direct current power supply 21 controls the controllable switch 23 to be closed after receiving the closing instruction of the controllable switch 23, so that the PSU22 supplies power to the switch power supply to be tested through the main board.
The PSU22 may furthermore be an AC-DC (Alternating Current-Direct current) power supply for converting mains electricity into Direct current.
As a preferred embodiment, the controllable switch 23 is a relay.
In this embodiment, the controllable switch 23 may be a relay, which is an automatic switch that uses a smaller current to control a larger current, and in actual operation, the control module 4 controls the actuation of the relay by controlling the dc power supply 21 to output a voltage of 5V, so as to realize that the PSU22 supplies power to the switch power supply to be tested through the motherboard, and the circuit structure is simple.
As a preferred embodiment, the user instruction includes an input voltage value of the switching power supply under test;
controlling the dc power supply 21 to supply power to the switch power supply to be tested includes:
the direct current power supply 21 is controlled to output and input a voltage value to supply power to the switch power supply to be tested.
In this embodiment, when the dynamic response testing device of the switching power supply starts to work, a user inputs a user instruction in the control module 4, where the user instruction includes an input voltage value of the switching power supply to be tested; the control module 4 sets the dc power supply 21 based on the input voltage value of the detected switching power supply, so that the output voltage value of the dc power supply 21 is the input voltage value of the detected switching power supply in the user instruction.
In addition, the control module 4 may be, but is not limited to, a PC controller, which has the advantages of having a strong data processing capability, having a strong network communication function, being capable of executing a relatively complex control algorithm and having a nearly unlimited storage capacity, etc., and the PC controller and the dc power supply 21 may communicate through a USB-GPIB, however, other communication methods may also be adopted, and the application is not limited in particular herein.
As a preferred embodiment, the acquisition module 3 is further configured to test the load current value of the load module 1, and display a waveform of the output voltage value of the tested switching power supply according to the load current value of the load module 1.
In order to realize automatic recording of the dynamic response test process of the switching power supply, in this embodiment, the acquisition module 3 may also be used to test the load current value of the load module 1, and display the waveform of the output voltage value of the tested switching power supply that varies with the load current value of the load module 1, so as to control the capturing and data recording of the waveform of the acquisition module 3 by the module 4, so as to determine whether the dynamic response of the tested switching power supply meets the requirement based on the test data.
In addition, the acquisition module 3 may be, but not limited to, an oscilloscope, where the oscilloscope includes a CH1 interface and a CH2 interface, the oscilloscope CH1 interface reads an output voltage value Vout 'of the measured switching power supply through a differential carbon rod, and the oscilloscope CH2 interface reads a load current value Iout' through a current gun.
The main board can be further provided with a capacitor, the capacitor is connected with the output end of the switch power supply to be tested, two flying wires are welded at the two ends of the capacitor, the flying wires are connected to the positive end and the negative end of the acquisition module 3, and the voltage value at the two ends of the capacitor detected by the acquisition module 3 is the output voltage value of the switch power supply to be tested. In addition, in the dynamic response test process of the switching power supply, the capacitor can be charged and discharged rapidly, and when the current of the load module 1 is changed instantaneously, the capacitor can also provide a part of current rapidly, so that the response speed is increased, and the output voltage of the switching power supply to be tested is stabilized.
As a preferred embodiment, the display device further comprises a display module; the control module 4 is also used for controlling the display module to display the judging result of whether the dynamic response of the tested switching power supply meets the requirement.
In this embodiment, the dynamic response testing device of the switching power supply further includes a display module, where the control module 4 controls the display module to display a determination result of whether the dynamic response of the tested switching power supply meets a requirement, and if the output voltage of the tested switching power supply is within a preset output voltage range, the display module displays a pass; and if the output voltage of the tested switching power supply is out of the preset output voltage range, the display module displays fail.
As a preferred embodiment, the user instruction includes a design output voltage value of the switching power supply under test;
the preset output voltage range is 0.97 to 1.03 of the design output voltage value of the tested switching power supply.
In this embodiment, when the dynamic response testing device of the tested switching power supply starts to work, a user inputs a user instruction in the control module 4, where the user instruction includes a design output voltage value Vout of the tested switching power supply;
the preset output voltage range in the application is "the design output voltage value Vout of the tested switching power supply is 0.97 +.the output voltage value Vout' of the tested switching power supply is less than or equal to the design output voltage value Vout of the tested switching power supply is 1.03", and the normal operation of the tested switching power supply can be ensured in the preset output voltage range.
As a preferred embodiment, the user instructions further comprise a full load output current value Imax;
determining a threshold value of load current based on a user instruction, comprising:
when the full-load output current value Imax is smaller than the standard current threshold value, determining that the large current threshold value of the load current is 90% of the full-load output current value Imax, and the small current threshold value is 10% of the full-load output current value Imax;
when the full-load output current value Imax is not smaller than the standard current threshold value, determining that the first large current threshold value of the load current is 50% of the full-load output current value Imax, and the first small current threshold value is 0% of the full-load output current value Imax; the second large current threshold is 100% of the full load output current value Imax and the second small current threshold is 50% of the full load output current value Imax.
In this embodiment, when the dynamic response testing device of the tested switching power supply starts to work, a user inputs a user instruction in the control module 4, and the user instruction further includes a full load output current value; the control module 4 determines a threshold value of the load current and a variation pattern of the load current based on the user instruction.
Specifically, the working mode of the load module 1 is set as CCDH (Constant Current Dynamic High mode );
according to the difference of the full-load output current, the dynamic response of the normal operation of the tested switching power supply is different, and the standard current threshold I is used as the basis for judging the current.
When the full-load output current value Imax of the tested switching power supply is smaller than the standard current threshold value I, the power supply with the end directly driving the load is usually characterized by frequent start and stop. When the load is not in operation, the load is kept in a standby state and is kept in a small load state, and the small current threshold value of the load current can be considered as the load with the full load output current value of Imax being 10% in the test. When the load is normally operated under the full load condition, because a peak current is formed when the current is rapidly changed, if the load is directly reached to the full load, the peak current can possibly cause the damage of the tested switching power supply, so that a large current threshold value of the load current is set to be 90% of the full load output current value Imax, and then the load current is slowly compensated to the full load. So when testing this type of switching power supply, the load current threshold is set to be a large current threshold high=90% of the full load output current value Imax, and a small current threshold low=10% of the full load output current value Imax.
When the full load output current value Imax of the tested switching power supply is not smaller than the standard current threshold value I, if the load current is from 0 to Imax, the tested switching power supply is easily damaged by severe instantaneous current change. In this case, the switching power supply to be tested may have a state change when the load current changes to an intermediate value, so that it is different in a high-current operation state from a low-current operation state. That is, it is necessary to test the dynamic response of the switching power supply from the first small current threshold value being 0% of the full load output current value Imax to the first large current threshold value being 50% of the full load output current value Imax, and from the second small current threshold value being 50% of the full load output current value Imax to the second large current threshold value being 100% of the full load output current value Imax. So when testing this kind of switching power supply, the load current threshold is set to be 50% of the full load output current value Imax for the first time, and the first time is set to be 0% of the full load output current value Imax for the first time; the second large current threshold is 100% of the full load output current value Imax and the second small current threshold is 50% of the full load output current value Imax.
The standard current threshold may be 20A current, and is not particularly limited herein.
The load current may be changed at a frequency, and the change manner may be determined based on the above-set large current threshold, small current threshold, large current threshold duration, small current threshold duration, rate of change of the large current threshold to the small current threshold, and rate of change of the small current threshold to the large current threshold.
For example, the large current threshold duration ccdht1=0.5 ms, the small current threshold duration ccdht2=0.5 ms, the rate of change of the large current threshold to the small current threshold ccdh1=2.5A/us, and the rate of change of the small current threshold to the large current threshold ccdh2=2.5A/us are not particularly limited herein.
The user command also includes a switching frequency Fsw so that the user knows the operating state of the switching power supply under test.
Referring to fig. 3, fig. 3 is a flowchart of a dynamic response test of a switching power supply provided in the present application.
In order to facilitate understanding of the test flow of the dynamic response test device of the switching power supply provided by the application, the following specifically describes the flow of the dynamic response test of the switching power supply:
1. the information of the tested switching power supply is input on the test report template, wherein the information comprises an input voltage value Vin of the tested switching power supply, a design output voltage value Vout of the tested switching power supply, a switching frequency Fsw and a full-load output current Iout.
2. The PC controller is connected with an oscilloscope, a DC power supply 21 and a load meter by USB-GPIB.
3. The output end of the tested switching power supply is connected with the load instrument through a load wire, the input end of the tested switching power supply is connected with the direct current power supply 21 or PSU, and a capacitance welding differential line is output at the far end.
4. The oscilloscope CH1 reads the output voltage value Vout 'of the switch power supply to be tested through the differential probe, and the oscilloscope CH2 reads the load current value Iout' through the current gun.
5. And starting the compiled application program, and displaying a user interface of the software.
6. The report of the read and save waveform data is selected in the user interface and the power supply mode (dc power supply 21 or PSU) is selected. If the direct current power supply 21 is directly powered, the PC controller directly controls the direct current power supply 21 to output the input voltage Vin of the switch power supply to be tested; if the power is selected to be supplied by the PSU, the PSU is connected to the output end of the relay, the control end of the relay is connected to the two ends of the direct current power supply 21, and the PC controller controls the direct current power supply 21 to output 5V voltage to control the relay to be attracted, so that the power supply is completed.
7. And reading the input voltage Vin of the tested switching power supply, the design output voltage Vout of the tested switching power supply, the switching frequency Fsw and the full-load output current Iout in a report, determining a preset output voltage range, and determining the threshold value of the load current of the load instrument and the variation mode of the load current. When the full load output current value is less than 20A, the threshold value of the load current is set: high=imax 90%, low=imax 10%; when the full load output current value is not less than 20A, the segment test is needed twice, and the threshold value of the first load current is set: high=imax 50%, low=imax 0%; threshold setting of the second load current: high=imax×100%, low=imax×50%.
8. Clicking a user interface RUN to start running a program, setting and running according to a determined power supply mode and a load meter, and returning waveforms and test data to the PC controller after the oscilloscope is operated according to the program.
9. The program analyzes and processes the data, compares the output voltage value of the tested switching power supply with a preset output voltage range, and judges whether the dynamic response of the tested switching power supply meets the requirement.
10. And importing the test result and the waveform into a test report, and displaying the test result pass or fail. The DC power supply 21 and the load instrument are turned off, and the test is completed.
It should be noted that in this specification the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A dynamic response testing device for a switching power supply, comprising:
the input end of the load module is connected with the output end of the switch power supply to be tested, and the load module is used for carrying out the change of the load current based on the threshold value of the load current and the change mode of the load current;
the output end of the power supply module is connected with the input end of the switch power supply to be tested and is used for supplying power to the switch power supply to be tested;
the input end of the acquisition module is connected with the output end of the tested switching power supply and is used for testing the output voltage value of the tested switching power supply when the load current of the load module changes;
the control module is respectively connected with the load module and the control end of the acquisition module and is used for determining a threshold value of the load current of the load module and a change mode of the load current based on a user instruction, judging whether the output voltage value of the tested switching power supply is in a preset output voltage range or not, and if so, judging that the dynamic response of the tested switching power supply meets the requirement;
the user instruction comprises a full load output current value; determining a threshold value of the load current based on a user instruction, comprising:
when the full-load output current value is smaller than a standard current threshold value, determining that a large current threshold value of the load current is 90% of the full-load output current value, and a small current threshold value is 10% of the full-load output current value;
when the full-load output current value is not smaller than a standard current threshold value, determining that a first large current threshold value of the load current is 50% of the full-load output current value, and a first small current threshold value is 0% of the full-load output current value; the second large current threshold is 100% of the full load output current value, and the second small current threshold is 50% of the full load output current value.
2. The device for testing the dynamic response of a switching power supply according to claim 1, wherein the power supply module is a direct current power supply, and an output end of the direct current power supply is connected with an input end of the switching power supply to be tested and is used for supplying power to the switching power supply to be tested.
3. The dynamic response testing device of a switching power supply according to claim 2, wherein the switching power supply to be tested is disposed on a motherboard;
the power module further includes:
and the PSU is used for supplying power to the tested switching power supply through the main board.
4. A dynamic response testing device for a switching power supply as claimed in claim 3, further comprising a controllable switch, a first end of the controllable switch being connected to mains, a second end of the controllable switch being connected to an input of the PSU, a control end of the controllable switch being connected to the dc power supply;
the control module is also used for controlling the direct current power supply to supply power for the switch power supply to be tested or sending a closing instruction of the controllable switch to the direct current power supply;
and the direct-current power supply is also used for controlling the controllable switch to be closed after receiving a closing instruction of the controllable switch, so that the PSU supplies power for the tested switch power supply through the main board.
5. The dynamic response testing device of a switching power supply according to claim 4, wherein the controllable switch is a relay.
6. The dynamic response testing device of a switching power supply according to claim 4, wherein the user instruction includes an input voltage value of the switching power supply under test;
controlling the direct current power supply to supply power to the tested switching power supply, comprising:
and controlling the direct current power supply to output the input voltage value so as to supply power for the tested switching power supply.
7. The device for testing the dynamic response of the switching power supply according to claim 1, wherein the acquisition module is further used for testing the load current value of the load module and displaying a waveform that the output voltage value of the tested switching power supply changes with the load current value of the load module.
8. The dynamic response testing device of a switching power supply according to claim 1, further comprising a display module;
the control module is also used for controlling the display module to display a judging result of whether the dynamic response of the tested switching power supply meets the requirement.
9. The dynamic response test device of a switching power supply according to claim 1, wherein the user instruction further includes a design output voltage value of the switching power supply under test;
the preset output voltage range is from 0.97 to 1.03 of the designed output voltage value of the tested switching power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110845267.0A CN113702858B (en) | 2021-07-26 | 2021-07-26 | Dynamic response testing device of switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110845267.0A CN113702858B (en) | 2021-07-26 | 2021-07-26 | Dynamic response testing device of switching power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113702858A CN113702858A (en) | 2021-11-26 |
| CN113702858B true CN113702858B (en) | 2024-03-15 |
Family
ID=78650493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110845267.0A Active CN113702858B (en) | 2021-07-26 | 2021-07-26 | Dynamic response testing device of switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113702858B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116312308B (en) * | 2023-04-27 | 2023-10-13 | 海的电子科技(苏州)有限公司 | Output voltage calibration method and device for shortening Bar and storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279176A (en) * | 1999-05-24 | 2001-01-10 | 丰田自动车株式会社 | Device for detecting electric supply at working status |
| CN101806869A (en) * | 2010-03-22 | 2010-08-18 | 株洲南车时代电气股份有限公司 | General-purpose automatic test system for locomotive switching power supply and method thereof |
| CN103165201A (en) * | 2011-12-14 | 2013-06-19 | 中国广东核电集团有限公司 | Nuclear power station power supply detection system and method |
| CN105071641A (en) * | 2015-08-14 | 2015-11-18 | 东南大学 | Method for controlling dynamic response of switch power |
| CN105242218A (en) * | 2015-09-24 | 2016-01-13 | 浪潮电子信息产业股份有限公司 | DC source full-coverage automatic test system |
| CN205280913U (en) * | 2015-12-29 | 2016-06-01 | 万高(杭州)科技有限公司 | Measuring instrument |
| CN106353696A (en) * | 2016-11-02 | 2017-01-25 | 郑州云海信息技术有限公司 | Efficiency testing system and method of switching power supply |
| CN111007389A (en) * | 2019-12-28 | 2020-04-14 | 苏州浪潮智能科技有限公司 | Testing arrangement of mainboard |
| CN111983499A (en) * | 2020-08-09 | 2020-11-24 | 苏州浪潮智能科技有限公司 | Testing method and system of switching power supply |
| CN112039064A (en) * | 2020-08-31 | 2020-12-04 | 科华恒盛股份有限公司 | Control method based on power supply system and related device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10007286B2 (en) * | 2011-01-24 | 2018-06-26 | Sunrise Micro Devices, Inc. | Switching regulator overload detector |
| CN103513191B (en) * | 2012-06-21 | 2016-04-27 | 国网山东省电力公司莱西市供电公司 | Power source loads proving installation |
-
2021
- 2021-07-26 CN CN202110845267.0A patent/CN113702858B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279176A (en) * | 1999-05-24 | 2001-01-10 | 丰田自动车株式会社 | Device for detecting electric supply at working status |
| CN101806869A (en) * | 2010-03-22 | 2010-08-18 | 株洲南车时代电气股份有限公司 | General-purpose automatic test system for locomotive switching power supply and method thereof |
| CN103165201A (en) * | 2011-12-14 | 2013-06-19 | 中国广东核电集团有限公司 | Nuclear power station power supply detection system and method |
| CN105071641A (en) * | 2015-08-14 | 2015-11-18 | 东南大学 | Method for controlling dynamic response of switch power |
| CN105242218A (en) * | 2015-09-24 | 2016-01-13 | 浪潮电子信息产业股份有限公司 | DC source full-coverage automatic test system |
| CN205280913U (en) * | 2015-12-29 | 2016-06-01 | 万高(杭州)科技有限公司 | Measuring instrument |
| CN106353696A (en) * | 2016-11-02 | 2017-01-25 | 郑州云海信息技术有限公司 | Efficiency testing system and method of switching power supply |
| CN111007389A (en) * | 2019-12-28 | 2020-04-14 | 苏州浪潮智能科技有限公司 | Testing arrangement of mainboard |
| CN111983499A (en) * | 2020-08-09 | 2020-11-24 | 苏州浪潮智能科技有限公司 | Testing method and system of switching power supply |
| CN112039064A (en) * | 2020-08-31 | 2020-12-04 | 科华恒盛股份有限公司 | Control method based on power supply system and related device |
Non-Patent Citations (1)
| Title |
|---|
| 多重保护本安电源测试装置;任高建 等;工矿自动化(第01期);第48-53页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113702858A (en) | 2021-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101634689B (en) | System and method for testing power supply properties | |
| CN109116266B (en) | Power module testing method | |
| CN103023349B (en) | Interchange turns direct current adaptive device and adaptive voltage output intent | |
| CN113702858B (en) | Dynamic response testing device of switching power supply | |
| KR102554814B1 (en) | testing system and portable device for charging apparatus of electric vehicle | |
| CN115267592A (en) | Test system | |
| JP2015152488A (en) | Electric current measuring apparatus, control method, and control program, for the same, recording medium, and wattage measuring apparatus | |
| CN202041590U (en) | Capacitor charge and discharge tester | |
| CN110620417A (en) | Flyback current mode PWM control charging system and charging method | |
| CN214953999U (en) | Multi-mode power electronic load system | |
| CN114646895A (en) | CPU power performance test system, method and storage medium | |
| CN106054113B (en) | A kind of quantification stability for electric energy meter tests system and its test method | |
| CN102353823B (en) | A kind of electronic load of semi-passive programmable simulation LED characteristic | |
| US11644513B1 (en) | Real-time AC-impedance inspection using limited-energy on-board AC excitation for battery management system | |
| CN207895046U (en) | A kind of intelligent test device of residual current action protector | |
| CN109596928A (en) | A kind of static parameter test device for automobile dynamo governor | |
| CN102759698A (en) | Main board test system | |
| CN210954270U (en) | Fuel cell test bench | |
| CN209471198U (en) | A kind of static parameter test device for automobile dynamo governor | |
| CN114594748A (en) | Test equipment, diagnostic equipment and automobile diagnostic system | |
| CN113945857A (en) | Detection device and method for switching power supply | |
| CN113138328A (en) | System and method for testing SOA (service oriented architecture) characteristics of MOS (metal oxide semiconductor) tube | |
| CN217563538U (en) | Variable voltage power supply device and device for development and test | |
| CN105606996A (en) | Automobile relay test method for simulating automobile motor load | |
| CN117270510A (en) | PWM controller detection system and detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |