CN104569680A - Testing device and method for DC/DC converter - Google Patents
Testing device and method for DC/DC converter Download PDFInfo
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- CN104569680A CN104569680A CN201510006691.0A CN201510006691A CN104569680A CN 104569680 A CN104569680 A CN 104569680A CN 201510006691 A CN201510006691 A CN 201510006691A CN 104569680 A CN104569680 A CN 104569680A
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Abstract
The invention provides a testing device and method for a DC/DC converter. The device comprises a test board, a programmable control power supply, a programmable control electronic load, a testing device body and a control device. The test board is connected with the programmable control electronic load and the testing device body. The control device is connected with the programmable control power supply, the programmable control electronic load and the testing device body. The control device is used for providing voltage for the DC/DC converter to be tested through control over the programmable control power supply, and controlling the programmable control electronic load to provide a load for the DC/DC converter. According to a set period, the testing device body is controlled to detect the testing parameters, in the testing environment, of the DC/DC converter to be tested, and the testing parameters detected by the testing device body are read. The testing parameters are tested through the testing device body and transmitted to the control device to be recorded and processed, and therefore while consumed labor is reduced, testing efficiency is improved.
Description
Technical field
The present invention relates to voltage conversion apparatus technical field of measurement and test, particularly relate to a kind of DC/DC transducer proving installation and DC/DC transducer method of testing.
Background technology
DC/DC transducer is the electric pressure converter effectively exporting fixed voltage after changing input voltage, and it is widely used in the fields such as long-range and data communication, computing machine, business automation equipment, industrial instruments.Along with the development of electronics industry, to reliably having higher requirement of DC/DC converter.Determine that the factor of DC/DC transducer reliability comprises system aspect (comprising technical scheme and circuit topology design, Interface design, environmental test condition adaptability design etc.), components and parts proper mass and assembling product defective workmanship aspect and voltage, electric current and temperature equal stress to the impact of its reliability.In fail-test, product test is one of most important gordian technique.Especially Real-Time Monitoring is carried out to product critical performance parameters by testing product in process of the test, can the performance degradation of Timeliness coverage product and inefficacy.
To the test mode of DC/DC converter reliability be generally in test process, by tester (at regular intervals regularly, the general time is longer) or aperiodically sample is taken out from chamber, then test each DC/DC transducer Specifeca tion speeification such as output voltage etc., tester connects test instrumentation and manually reads and manual logging test results instrument; Change after testing a sample and connect another sample, then repeating above-mentioned test.
Existing test mode connects test instrumentation due to needs tester, and instrument, manual read fetches data and manual logging test results, and the efficiency of test is lower.
Summary of the invention
Based on this, be necessary for the lower problem of the efficiency of existing test mode, a kind of DC/DC transducer proving installation and DC/DC transducer method of testing are provided.
A kind of DC/DC transducer proving installation, comprises breadboard, programmable power supply, program-control electronic load, proving installation, control device;
Described breadboard is connected with described program-control electronic load, proving installation respectively; Described control device is connected with described programmable power supply, program-control electronic load, proving installation respectively; Described programmable power supply connects described breadboard by described proving installation; DC/DC transducer to be measured is arranged on described breadboard;
Described programmable power supply is used for providing voltage to described DC/DC transducer to be measured; Described program-control electronic load is to the output load of described DC/DC transducer to be measured; Described proving installation is for detecting described DC/DC transducer to be measured test parameter under the test environment;
Described control device provides voltage for controlling described programmable power supply to described DC/DC transducer to be measured, controls described program-control electronic load and provides load to described DC/DC transducer to be measured; Detect described DC/DC transducer to be measured described test parameter under the test environment according to proving installation described in the periodic Control set, read the test parameter that described proving installation detects.
Above-mentioned DC/DC transducer proving installation, by breadboard, DC/DC transducer to be measured is installed and the interface of proving installation and program-control electronic load is provided, thus in test process, proving installation can detect the test parameter of DC/DC transducer to be measured, and described test parameter is delivered to control device and carries out recording and processing, while minimizing manpower expends, also improve the efficiency of DC/DC transducer test.
A kind of DC/DC transducer method of testing, realize based on above-mentioned DC/DC transducer proving installation, the method comprises the following steps:
Control device controls program-control electronic load and provides load to the DC/DC transducer to be measured be arranged on test board; Control programmable power supply and provide voltage to described DC/DC transducer to be measured;
According to the cycle of setting, control the test parameter that proving installation detects described DC/DC transducer to be measured under the test environment;
Read the test parameter that described proving installation detects to go forward side by side line item.
Above-mentioned DC/DC transducer method of testing, load and voltage is provided to the DC/DC transducer to be measured be arranged on test board respectively by control device control program-control electronic load and programmable power supply, under the test environment, control the test parameter that proving installation detects DC/DC transducer to be measured, thus control device can read described test parameter goes forward side by side line item, then reducing the efficiency also improving the test of DC/DC transducer while manpower expends.
Accompanying drawing explanation
Fig. 1 is an embodiment DC/DC transducer proving installation structural representation;
Fig. 2 is another embodiment DC/DC transducer proving installation structural representation;
Fig. 3 is an embodiment breadboard construction schematic diagram;
Fig. 4 is that DC/DC transformer configuration schematic diagram to be measured installed by an embodiment breadboard;
Fig. 5 is an embodiment DC/DC transducer proving installation software interface schematic diagram;
Fig. 6 is an embodiment DC/DC transducer test result figure;
Fig. 7 is an embodiment DC/DC transducer method of testing process flow diagram.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to DC/DC transducer proving installation of the present invention and DC/DC transducer method of testing.
Refer to Fig. 1, Fig. 1 is an embodiment DC/DC transducer proving installation structural representation.
A kind of DC/DC transducer proving installation, comprises breadboard 140, programmable power supply 150, program-control electronic load 130, proving installation 120, control device 110;
Described breadboard 140 is connected with described program-control electronic load 130, proving installation 120 respectively; Described control device 110 is connected with described programmable power supply 150, program-control electronic load 130, proving installation 120 respectively; Described programmable power supply 150 connects described breadboard 140 by described proving installation 120; DC/DC transducer 160 to be measured is arranged on described breadboard 140;
Described programmable power supply 150 provides voltage for giving described DC/DC transducer 160 to be measured; Described program-control electronic load 130 is to the output load of described DC/DC transducer to be measured; Described proving installation 120 is for detecting described DC/DC transducer 160 to be measured test parameter under the test environment;
Described control device 110 provides voltage for controlling described programmable power supply 150 to described DC/DC transducer 160 to be measured, controls described program-control electronic load 130 and provides load to described DC/DC transducer 160 to be measured; Detect described DC/DC transducer 160 to be measured described test parameter under the test environment according to proving installation 120 described in the periodic Control set, read the test parameter that described proving installation 120 detects.
Above-mentioned DC/DC transducer proving installation, DC/DC transducer 160 to be measured can have multiple, by breadboard 140, DC/DC transducer 160 to be measured is installed and the interface of proving installation 120 and program-control electronic load 130 is provided, thus in test process, proving installation 120 can detect the test parameter of DC/DC transducer 160 to be measured, and described test parameter is delivered to control device 110 and carries out recording and processing, while minimizing manpower expends, also improve the efficiency of DC/DC transducer test.
In one embodiment, described control device 110 can also be used for monitoring described test parameter numerical value, if described test parameter numerical value is greater than the threshold value of setting, then sends early warning signal.
The threshold value of setting can be tested needs according to reality and be set, and such as output voltage is set to 50V, and when test parameter numerical value is greater than the threshold value of setting, sending early warning signal Timeliness coverage properties of product can degenerate and lost efficacy, and improves the accuracy of test.
In one embodiment, described proving installation 120 can comprise: digital multimeter and oscillograph;
Described digital multimeter connects described breadboard 140 and control device 110 respectively; Described oscillograph connects described breadboard 140 and control device 110 respectively; Described oscillograph and digital multimeter are for detecting the described test parameter of DC/DC transducer 160 to be measured; Wherein, described test parameter comprises: output voltage ripple, output voltage and input current.
Output voltage, output voltage ripple and input current are the important parameters of inspection DC/DC transducer performance, by utilizing digital multimeter and oscillograph to detect corresponding test parameter, can detect the performance of DC/DC transducer to be measured more accurately.
Further, in one embodiment, described control device 110 can also be used for controlling input voltage and the output current that described digital multimeter detects described DC/DC transducer 160 to be measured; Read described input voltage and output current, the output voltage corresponding according to different input voltage calculates voltage regulation factor; The output voltage corresponding according to different output current calculates current regulation; And calculate gross output and power input according to described input voltage, input current, output voltage and output current, calculate efficiency according to described gross output and power input.
Voltage regulation factor and current regulation (increasing " efficiency ") are the important parameters of reflection DC/DC transducer performance, voltage regulation factor (S
v) refer to rated condition under, DC/DC transducer is (full load conditions) when output current remains unchanged, the variable quantity of output voltage caused due to input voltage change.Computing formula is:
S
v=max{| (V
o1-V
o) |, | (V
o2-V
o) |, wherein, V
o1, V
o2for input voltage is V
imax(voltage when electric current is maximum), V
iminoutput voltage time (voltage when electric current is minimum), V
ofor the output voltage under nominal input voltage.
Current regulation (S
i) refer to rated condition under, DC/DC transducer is (nominal input voltage) when input voltage remains unchanged, the variable quantity of output voltage caused due to output current change.
Computing formula is: S
i=| V
o1-V
o|,
Wherein, V
ofor the output voltage under full load conditions, V
o1for output current is I
ominthe output voltage of (idle condition).
Efficiency (η) refers to the gross output of DC/DC transducer and the number percent of power input under rated condition.Computing formula is:
η＝P
OUT/P
IN×100％，(P
IN＝V
I×I
I，P
OUT＝Σ(∣V
O×I
O∣))
Wherein, P
oUTfor gross output, P
iNfor power input, V
ifor input voltage, I
ifor input current, V
ofor output voltage, I
ofor output current.
By reading input/output voltage and the I/O electric current of DC/DC transducer 160 to be measured, thus obtain corresponding voltage regulation factor, efficiency and current regulation according to formulae discovery, by analyzing and monitoring voltage regulation, efficiency and current regulation, the performance of DC/DC transducer 160 to be measured can be tested more accurately.
In one embodiment, the display device be connected with described control device 110 is also comprised; Described display device is used for the test parameter that the described proving installation 120 that described control device 110 reads detects to carry out graphic software platform.
By graphic software platform test parameter, tester can be facilitated to analyze the performance of DC/DC transducer to be measured.
Above-mentioned DC/DC transducer proving installation, can realize carrying out Automatic continuous test to parameters such as the output voltage of multiple DC/DC transducer product, input current, output voltage ripple, voltage regulation factor and current regulations in Reliability Enhancement Testing, and undertaken recording and preserving by control device, overcome testing efficiency in conventional test methodologies low, easily to make mistakes and the shortcoming of consistance difference.Meanwhile, also can the performance degradation of Timeliness coverage DC/DC transducer product and inefficacy in Reliability Enhancement Testing process.
In order to further describe DC/DC transducer proving installation of the present invention in detail, be described below in conjunction with embody rule example.
Refer to Fig. 2, Fig. 2 is another embodiment DC/DC transducer proving installation structural representation.
The DC/DC transducer proving installation of this embody rule example is primarily of compositions such as breadboard, programmable power supply, program-control electronic load, oscillograph, digital multimeter, control device.Breadboard is the carrier of DC/DC transducer to be measured in test, and as shown in Figure 3, DC/DC transducer to be measured is interconnected by breadboard and testing apparatus; Breadboard comprises three stations, and each station comprises output ripple voltage test circuit, needs resistance, electric capacity and sub-miniature A connector that welding is upper corresponding, to be connect by SMA and is connected with oscillograph, realize the test of output ripple voltage with coaxial cable.
Be the sample mounting hole according to DC/DC pin arrangement design in frame, the upper compression bonded line spring socket of mounting hole welding, then can directly insert in compression bonded line spring socket by DC/DC, the harmless dismounting that the method is beneficial to different sample is replaced.Finally by welding lead (higher temperature line), connect programmable power supply, electronic load and digital multimeter by wire, realize loading and parameter testing powering up of DC/DC.
Be provided with DC/DC transducer in control device and power up Loading Control and parameter testing program, control device composition comprises: adding electric control module, is that multiple DC/DC transducer to be measured carries out powering up or turning off for controlling programmable power supply; Loading Control module, provides load for controlling program-control electronic load for multiple DC/DC transducer to be measured; Data record and processing module, for the data such as output voltage, input current, output voltage ripple of control figure multimeter, each DC/DC transducer to be measured of oscillograph detection, test data reads the frequency and program-controlled setting interval time, test data is through GPIB (General-Purpose Interface Bus, general purpose interface bus) data collecting card is sent to control device and obtains the supplemental characteristics such as efficiency, voltage regulation factor, current regulation by this module arithmetic process, and data record and processing module can also store test data; Warning module, this module has degradation failure warning function, by setting threshold value, DC/DC transducer parameters test data to be measured and threshold value are carried out real-time dynamic contrast, provide early warning signal when parameter exceeds threshold value of warning scope, threshold value can set according to product closed specification or application requirement.Control device also provides control program man-machine interactive interface, and shows for current test data Dynamic Announce, parameter degradation graphic software platform and early warning signal.
Because DC/DC transducer performance parameter is numerous, therefore first select for the larger parameter of DC/DC transducer performance impact, thus determine the test parameter collection comprising output voltage, input current, voltage regulation factor, current regulation, efficiency, output voltage ripple; Then in conjunction with the design feature of DC/DC transducer specific product, input-output characteristic and test parameter collection, utilize beta version that DC/DC transducer to be measured is installed, breadboard adopts multistation and easily extensible, DC/DC transducer to be measured is installed on breadboard by compression bonded line spring socket, as shown in Figure 4, the breadboard in Fig. 4 is three stations; Multistation breadboard is adopted to be beneficial to the dismounting replacement of different DC/DC transducer to be measured and reusing of breadboard, breadboard comprises the measurement circuit adopting coaxial cable method test DC/DC transducer output voltage ripple in addition, and connect oscillograph by SMA interface 50 ohm coaxial cables, to realize the accurately test continuously to DC/DC output voltage ripple in process of the test; When testing, multiple DC/DC transducer being installed on breadboard, and being jointly positioned in chamber, and connecting testing apparatus according to Fig. 1; In reliability intensifying test, control device controls power supply and provides load for each DC/DC transducer powers up and control electronic load for each DC/DC transducer, control device successively reads each DC/DC transducer output voltage, input current and output voltage ripple data by gpib bus or other host-host protocols from digital multimeter, oscillograph, data are sent to control device by data collecting card, obtain the data such as efficiency, voltage regulation factor, current regulation by data record and processing module calculation process, and data are stored according to set path; In parameter testing process, test data and software preset the real-time Dynamic comparison of degeneration threshold value of warning, provide early warning signal when exceeding threshold range; Above-mentioned data test process is according to the frequency set and interval automatic cycle; Current test data, parameter variation tendency and early warning signal show on the display interface of control device; Test is interrupted or after end, is controlled automatic powered-down and electronic load by control device, terminates parameter testing.DC/DC transducer proving installation software interface as shown in Figure 5.
Below the parameter testing in reliability intensifying high temperature Step test of DC/DC transducer is described.The DC/DC transducer turnout fixed working voltage adopted in this embody rule example is 28V, and in test, input voltage range is 17 ~ 40V, fully loaded output current 1A.High temperature stepping is from 50 DEG C, and less than 110 DEG C step-lengths are 10 DEG C, and more than 110 DEG C step-lengths are 5 DEG C, and each temperature stress lower residence time is 30 minutes.This tests totally 3, DC/DC transducer to be measured, utilize the device of this embody rule example to carry out follow-on test to the output voltage of 3 DC/DC transducers to be measured, input current, output voltage ripple, efficiency, voltage regulation factor and current regulation in process of the test, at interval of 20S, 3 DC/DC transducer parameters to be measured are carried out loop test and preserved test data.The DC/DC transducer parameters test data to be measured of being preserved by EXCEL form after test as shown in Figure 6.In process of the test when temperature is elevated to 120 DEG C, wherein a DC/DC transducer to be measured is formed to produce and degenerates, and parameter is beyond threshold value of warning scope, and in this invention test macro, warning module gives degeneration early warning signal by warning lamp.
Be directed to above-mentioned DC/DC transducer proving installation, the present invention also provides the DC/DC transducer method of testing based on this device, and the method can improve the efficiency of DC/DC transducer test.
Refer to Fig. 7, Fig. 7 is an embodiment DC/DC transducer method of testing process flow diagram.
A kind of DC/DC transducer method of testing, comprises the following steps:
Step S301: control device controls program-control electronic load and provides load to the DC/DC transducer to be measured be arranged on test board; Control programmable power supply and provide voltage to described DC/DC transducer to be measured;
In step S301, provide the object of load to be to detect the test parameter of DC/DC transducer to be measured under full load conditions to DC/DC transducer to be measured, thus obtain the performance change situation of DC/DC transducer to be measured under full load conditions.
Step S303: according to the cycle of setting, controls the test parameter that proving installation detects described DC/DC transducer to be measured under the test environment;
In step S303, constantly controlling according to the cycle of setting the object that proving installation detects the test parameter of described DC/DC transducer to be measured is under the test environment degenerate in order to Timeliness coverage properties of product and lost efficacy, and improves the accuracy of test.
Step S305: read the test parameter that described proving installation detects and to go forward side by side line item.
In step S305, read the test parameter line item of going forward side by side that described proving installation detects and tester can be facilitated to carry out analyzing and summing up.
In one embodiment, the test parameter that the described proving installation of described reading detects go forward side by side line item step after can also comprise:
Described test parameter numerical value is monitored, if described test parameter numerical value is greater than the threshold value of setting, then sends early warning signal.
The threshold value of setting can be tested needs according to reality and be set, and such as output voltage is set to 50V, and when test parameter numerical value is greater than the threshold value of setting, sending early warning signal Timeliness coverage properties of product can degenerate and lost efficacy, and improves the accuracy of test.
In one embodiment, described test parameter can comprise: output voltage ripple, input voltage, output voltage, output current and input current.
Output voltage ripple, input voltage, output voltage, output current and input current are the important parameters of inspection DC/DC transducer performance, can detect the performance of DC/DC transducer to be measured by recording and analyze these test parameters more accurately.
Further, in one embodiment, the go forward side by side step of line item of the test parameter that the described proving installation of described reading detects can comprise:
Read the output voltage ripple of described DC/DC transducer to be measured, input voltage, output voltage, output current and input current;
The output voltage corresponding according to different input voltage calculates voltage regulation factor; The output voltage corresponding according to different output current calculates current regulation; And calculate gross output and power input according to described input voltage, input current, output voltage and output current, calculate efficiency according to described gross output and power input;
Record described output voltage ripple, input voltage, output voltage, output current, input current, voltage regulation factor, current regulation and efficiency.
Voltage regulation factor, current regulation and efficiency are the important parameters of reflection DC/DC transducer performance, by reading input/output voltage and the I/O electric current of DC/DC transducer to be measured, thus obtain corresponding voltage regulation factor, current regulation and efficiency according to formulae discovery, by analyzing and monitoring voltage regulation, current regulation and efficiency, the performance of DC/DC transducer to be measured can be tested more accurately.
In one embodiment, the cycle of described setting can be 30 seconds.
The cycle of setting is set to 30 seconds, can the detection DC/DC transducer 160 to be measured of higher frequency, shorten test interval, thus performance degradation and the inefficacy of DC/DC transducer product can be found more timely.
Above-mentioned DC/DC transducer method of testing, load and voltage is provided to the DC/DC transducer to be measured be arranged on test board respectively by control device control program-control electronic load and programmable power supply, under the test environment, control the test parameter that proving installation detects DC/DC transducer to be measured, thus control device can read described test parameter goes forward side by side line item, then reducing the efficiency also improving the test of DC/DC transducer while manpower expends.
DC/DC transducer proving installation of the present invention and DC/DC transducer method of testing one_to_one corresponding of the present invention, the technical characteristic of setting forth in the embodiment of above-mentioned DC/DC transducer method of testing and beneficial effect thereof are all applicable to, in the embodiment of DC/DC transducer proving installation, hereby state.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a DC/DC transducer proving installation, is characterized in that, comprises breadboard, programmable power supply, program-control electronic load, proving installation, control device;
Described breadboard is connected with described program-control electronic load, proving installation respectively; Described control device is connected with described programmable power supply, program-control electronic load, proving installation respectively; Described programmable power supply connects described breadboard by described proving installation; DC/DC transducer to be measured is arranged on described breadboard;
Described programmable power supply is used for providing voltage to described DC/DC transducer to be measured; Described program-control electronic load is to the output load of described DC/DC transducer to be measured; Described proving installation is for detecting described DC/DC transducer to be measured test parameter under the test environment;
Described control device provides voltage for controlling described programmable power supply to described DC/DC transducer to be measured, controls described program-control electronic load and provides load to described DC/DC transducer to be measured; Detect described DC/DC transducer to be measured described test parameter under the test environment according to proving installation described in the periodic Control set, read the test parameter that described proving installation detects.
2. DC/DC transducer proving installation according to claim 1, is characterized in that, described control device also for monitoring described test parameter numerical value, if described test parameter numerical value is greater than the threshold value of setting, then sends early warning signal.
3. DC/DC transducer proving installation according to claim 1, it is characterized in that, described proving installation comprises: digital multimeter and oscillograph;
Described digital multimeter connects described breadboard and control device respectively; Described oscillograph connects described breadboard and control device respectively; Described oscillograph and digital multimeter are for detecting the described test parameter of DC/DC transducer to be measured; Wherein, described test parameter comprises: output voltage ripple, output voltage and input current.
4. DC/DC transducer proving installation according to claim 3, is characterized in that, described control device also detects input voltage and the output current of described DC/DC transducer to be measured for controlling described digital multimeter; Read described input voltage and output current, the output voltage corresponding according to different input voltage calculates voltage regulation factor; The output voltage corresponding according to different output current calculates current regulation; And calculate gross output and power input according to described input voltage, input current, output voltage and output current, calculate efficiency according to described gross output and power input.
5. DC/DC transducer proving installation according to claim 1, is characterized in that, also comprises the display device be connected with described control device; The test parameter that the described proving installation that described display device is used for described control device to read detects carries out graphic software platform.
6. a DC/DC transducer method of testing, is characterized in that, realize based on the arbitrary described DC/DC transducer proving installation of claim 1 to 5, the method comprises the following steps:
Control device controls program-control electronic load and provides load to the DC/DC transducer to be measured be arranged on test board; Control programmable power supply and provide voltage to described DC/DC transducer to be measured;
According to the cycle of setting, control the test parameter that proving installation detects described DC/DC transducer to be measured under the test environment;
Read the test parameter that described proving installation detects to go forward side by side line item.
7. DC/DC transducer method of testing according to claim 6, is characterized in that, the test parameter that the described proving installation of described reading detects go forward side by side line item step after also comprise:
Described test parameter numerical value is monitored, if described test parameter numerical value is greater than the threshold value of setting, then sends early warning signal.
8. DC/DC transducer method of testing according to claim 6, it is characterized in that, described test parameter comprises: output voltage ripple, input voltage, output voltage, output current and input current.
9. DC/DC transducer method of testing according to claim 8, is characterized in that, the go forward side by side step of line item of the test parameter that the described proving installation of described reading detects comprises:
Read the output voltage ripple of described DC/DC transducer to be measured, input voltage, output voltage, output current and input current;
The output voltage corresponding according to different input voltage calculates voltage regulation factor; The output voltage corresponding according to different output current calculates current regulation; And calculate gross output and power input according to described input voltage, input current, output voltage and output current, calculate efficiency according to described gross output and power input;
Record described output voltage ripple, input voltage, output voltage, output current, input current, voltage regulation factor, current regulation and efficiency.
10. DC/DC transducer method of testing according to claim 6, is characterized in that, the cycle of described setting is 30 seconds.
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| CN113917228A (en) * | 2021-09-30 | 2022-01-11 | 北京维普无限智能技术有限公司 | DC-DC conversion circuit-oriented work efficiency detection circuit and detection method |
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