CN210294436U - Current-sharing testing device - Google Patents
Current-sharing testing device Download PDFInfo
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- CN210294436U CN210294436U CN201920979792.XU CN201920979792U CN210294436U CN 210294436 U CN210294436 U CN 210294436U CN 201920979792 U CN201920979792 U CN 201920979792U CN 210294436 U CN210294436 U CN 210294436U
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Abstract
The application discloses a current-sharing test device which mainly comprises a plurality of precision resistors with equal resistance values and a multi-path data acquisition unit, wherein any precision resistor is matched with an inductor; any precise resistor is arranged at the output end of the inductor and is connected with the inductor in series, and two measuring lines of any path in the multi-path data acquisition unit are respectively connected with two ends of any precise resistor. By the device, the test operation can be simplified, the test efficiency is greatly improved, and the reliability and the accuracy of the test result are improved.
Description
Technical Field
The application relates to the technical field of service board card testing, in particular to a current sharing testing device.
Background
With the development of server technology, the power consumption of the server is higher and higher, and the design of the server board card is more and more complex. In the design of the board card, in order to meet the consumption of a high-power device at the rear end part, the design of a circuit at the front end needs to be designed with high power. On the premise that the voltage is relatively fixed, a large current needs to be designed for realizing high power. When the current is large, a multi-path design is usually adopted, that is, a plurality of conversion inductors exist in the circuit, and the current requirement of the back end is segmented by the plurality of conversion inductors. In order to ensure the normal work of the circuit, the inductor in the circuit needs to be in a current sharing state during working, so that the current sharing test of the conversion inductor is an important problem in the design of the board card.
At present, a device for performing current sharing test on a conversion inductor mainly comprises: a plurality of cables, a plurality of current probes and an oscilloscope. Each cable is connected with the output end of one conversion inductor, the cable penetrates through a hole of a hollow structure in the current probe, the input end of the current probe is used for sensing the current of the cable penetrating through the hole of the current probe, the output end of the current probe is connected with an oscilloscope, and the oscilloscope is used for displaying the current value. Taking a current sharing test of 2 inductors as an example, a structural schematic diagram of a 2-way inductor circuit can be seen in fig. 1, where L1 and L2 in fig. 1 are inductors in the circuit. As shown in fig. 2, in order to test the current flowing through the inductor in each path, the rear end of each inductor needs to be disconnected, a cable is connected in series, and then the current flowing through the inductor is measured by using a current probe in cooperation with an oscilloscope.
However, in the current testing device, each inductor needs to be disconnected from the board card during testing, then a section of cable is welded, and then the cable is connected in series to the current probe for current measurement, so that the testing operation is complicated. And when the cable is connected in series with the current probe for operation, the welded inductor and the welded cable are very easy to break, and the multi-path measurement needs more welding and dismounting welding work, so that the reliability and the accuracy of the testing device are poor.
SUMMERY OF THE UTILITY MODEL
The application provides a flow equalization testing device to solve the problems that a testing device in the prior art is complex in operation and poor in testing reliability and accuracy.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
a current sharing test device for testing the current flowing through an inductor in a server board card conversion circuit, the test device comprising: the circuit comprises a plurality of precision resistors with equal resistance values and a multi-path data acquisition unit, wherein any precision resistor is matched with an inductor;
and any precision resistor is arranged at the output end of the inductor and is connected with the inductor in series, and any two measuring lines of the multi-path data acquisition unit are respectively connected with two ends of any precision resistor.
Optionally, two measurement lines of any one of the multiple paths of data collectors are respectively and fixedly connected with two ends of any one of the precision resistors.
Optionally, two measuring lines of any one of the multiple paths of data collectors are respectively connected with two ends of any one of the precision resistors in a welding manner.
Optionally, a resistance test fixture is further arranged in the test device, the plurality of precision resistors are arranged on the resistance test fixture in parallel, a lead with a connector is arranged at each of two ends of each of the precision resistors, one end of each lead is connected with the output end of the inductor matched with the precision resistor, and the other end of each lead is connected with the board card where the inductor is located.
Optionally, the number of the conversion circuits that the multiple data collectors can measure simultaneously is: 2-8.
Optionally, the types of the multiple data collectors are: 34970A.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the application provides a test device flow equalizes, and the device is arranged in the electric current that flows through the inductance in the test server integrated circuit board converting circuit. The device mainly comprises a plurality of precision resistors with equal resistance values and a multi-path data acquisition unit, each precision resistor is matched with one inductor, the precision resistors are connected with the inductors in series, and any precision resistor is arranged at the output end of the inductor, so that the current flowing through the precision resistors is the current flowing through the inductor. Two measuring lines of any one path in the multi-path data acquisition unit are respectively connected with two ends of any precise resistor and used for measuring the voltage drop at two ends of the precise resistor. According to the voltage drop at two ends of the precision resistor and the resistance value of the precision resistor, the current magnitude of the current flowing through the precision resistor can be calculated, the current magnitude of each conversion circuit is obtained, and whether the current sharing among the conversion circuits is realized can be judged. Therefore, by using the testing device in this embodiment, it is only necessary to determine whether the voltage values collected by the multiple data collectors are equal, and it is possible to determine whether the current sharing between the conversion circuits is performed.
The embodiment utilizes a plurality of precision resistors and a multi-channel data acquisition unit to test the current sharing, directly connects the measuring lines of the multi-channel data acquisition unit to the two ends of any precision resistor, has simpler connection operation during testing, and is beneficial to simplifying the test operation. And when the measuring line is connected with two ends of the precision resistor, a current probe does not need to be connected in series, and the measuring line cannot be pulled in the measuring operation, so that the structural design is favorable for improving the reliability and the accuracy of the test result. In addition, the measuring lines of the multi-path data acquisition unit only play a role in detecting voltage, normal work of the conversion circuit cannot be affected, the measuring lines are thin, welding is easy if the measuring lines are connected in a welding mode, welding is firm after welding, and reliability of measuring results is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a 2-way inductor circuit;
FIG. 2 is a schematic diagram illustrating a testing principle of a testing apparatus in the prior art;
fig. 3 is a schematic structural diagram of a current sharing test apparatus according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating a testing principle of a current sharing testing apparatus according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating a welding connection mode of a precision resistor and a measuring line of a multi-path data collector in the embodiment of the present application;
FIG. 6 is a schematic diagram of a detachable connection of a precision resistor and a conversion circuit according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a resistance testing fixture in an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For a better understanding of the present application, embodiments of the present application are explained in detail below with reference to the accompanying drawings.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a current sharing test device according to an embodiment of the present disclosure. As can be seen from fig. 1, the testing apparatus in this embodiment mainly includes: the device comprises a plurality of precision resistors and a multi-path data acquisition unit, wherein any precision resistor is matched with an inductor. Any precision resistor is arranged at the output end of the inductor and is connected with the inductor in series, so that the current flowing through the precision resistor is the current flowing through the inductor. And two measuring lines of any one path in the multi-path data acquisition unit are respectively connected with two ends of any precision resistor and used for testing the voltage values at two ends of the precision resistor. It should be noted that the resistances of the precision resistors are equal in this embodiment.
The testing device is arranged on the board card and connected with the conversion circuit. The direction of current flowing into the inductor is used as the front end of the inductor, and the direction of current flowing out of the inductor is used as the rear end of the inductor. And according to the resistance value of the precision resistor and the voltage value of the precision resistor obtained by the multi-path data acquisition unit, the current flowing through each precision resistor can be calculated. Because the resistance values of the precision resistors are equal, in this embodiment, after the voltage values of the precision resistors are collected by the multi-path data collector, the current-sharing test result can be obtained only by judging whether the voltage values are equal in size.
Taking the 2-way conversion circuit as an example, a schematic diagram of a test principle of the current sharing test apparatus in this embodiment can be seen in fig. 4.
Further, in this embodiment, the multi-channel data collector may measure a plurality of conversion circuits at the same time, the number of the conversion circuits is the same as the number of the inductors, and usually 2 to 8 conversion circuits may be measured at the same time. The optimal type of the multi-path data acquisition unit is 34970A, the number of the multi-path data acquisition units of the type is more, and the testing of more conversion circuits is facilitated, so that the testing efficiency is improved; and the voltage measurement precision of the multi-channel data acquisition unit of the type is high, which is beneficial to improving the accuracy of the current sharing test result.
The precision resistor in this embodiment may be fixedly connected to the conversion circuit or detachably connected to the conversion circuit.
In this embodiment, two measurement lines of any one of the multiple paths of data acquisition units are respectively and fixedly connected with two ends of any one of the precision resistors. In particular, a welded connection may be used, as shown in fig. 5. In the figure 5, the front end of the inductor is connected with the board card, and the rear end of the inductor is pried and then connected into the precision resistor in a welding mode. Because the measuring line of the multi-channel data acquisition unit is only used for detecting voltage, the measuring line is thin and is very easy to weld, and the welding is firm, the connection mode and the structural design can simplify the test operation and greatly improve the accuracy and the reliability of the current sharing measurement.
In addition, the precision resistor in the embodiment can be detachably connected to the conversion circuit. Specifically, a crimping connection may be employed, as shown in fig. 6. In fig. 6, the front end of the inductor is connected with the board card, the rear end of the inductor is pried and then connected into the precision resistor in a crimping mode, and the rear end of the precision resistor is connected to the board card to form a complete circuit.
For realizing the detachable connection, this embodiment sets up a resistance test fixture in testing arrangement, and a plurality of precision resistors set up side by side on resistance test fixture, and the both ends of arbitrary precision resistor respectively set up a lead wire of taking the connector, and the one end of lead wire is connected with the output of the inductance that precision resistor matches, and the other end and the integrated circuit board at inductance place of lead wire are connected, that is to say during the other end access integrated circuit board of lead wire. Fig. 7 shows a schematic structural diagram of the resistance testing fixture in this embodiment. In the resistance test fixture, the precise resistors are arranged in parallel, but are not in parallel connection, and each precise resistor is connected in series with the matched inductor through the resistance test fixture.
Adopt the mode that the accurate resistance can be dismantled and connect to the realization of resistance tool board, can carry out the change of the accurate resistance of different resistances very conveniently according to the actual demand of converting line, can also be according to the nimble quantity that switches the accurate resistance of inductance quantity. For example: if only 3 conversion circuits need to be tested, 3 precision resistors matched with the inductor only need to be connected into the resistor testing jig, and the rest precision resistors are disconnected through the connectors on the lead wires. Therefore, the structural design can further improve the flexibility of the current sharing test and the convenience of operation, and is beneficial to improving the test efficiency.
Taking 2 paths of conversion circuits and precision resistors connected by welding as an example, the steps of performing the current sharing test by using the current sharing test device of the embodiment are as follows:
1) a precise resistor is connected in series at the rear end of the inductor of each path;
2) respectively welding the positive electrode and the negative electrode of the data measuring line of the data acquisition unit to the front end and the rear end of the precision resistor;
3) starting a data acquisition unit;
4) and starting the circuit switch to make the circuit start to work.
5) And clicking a multi-path data acquisition device switch to start to acquire the data of the 2 paths of precision resistors.
6) And after the acquisition is finished, closing the switch of the multi-path data acquisition unit.
7) Respectively obtaining 2 paths of specific current numerical values by using an ohm law according to the resistance value of the precision resistor and the acquired voltage value, namely the current value flowing through the inductor; and comparing the current values of the 2 paths of inductors to judge whether the 2 paths of inductors work in a current equalizing state.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. 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 application. Thus, the present application 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 (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979792.XU CN210294436U (en) | 2019-06-27 | 2019-06-27 | Current-sharing testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979792.XU CN210294436U (en) | 2019-06-27 | 2019-06-27 | Current-sharing testing device |
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| CN210294436U true CN210294436U (en) | 2020-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540197A (en) * | 2020-11-12 | 2021-03-23 | 浪潮电子信息产业股份有限公司 | Server power supply test fixture |
| CN112964952A (en) * | 2021-02-19 | 2021-06-15 | 山东英信计算机技术有限公司 | Server test system |
-
2019
- 2019-06-27 CN CN201920979792.XU patent/CN210294436U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540197A (en) * | 2020-11-12 | 2021-03-23 | 浪潮电子信息产业股份有限公司 | Server power supply test fixture |
| CN112964952A (en) * | 2021-02-19 | 2021-06-15 | 山东英信计算机技术有限公司 | Server test system |
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