CN115113088A - Load current testing device, power supply and server - Google Patents
Load current testing device, power supply and server Download PDFInfo
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- CN115113088A CN115113088A CN202210727070.1A CN202210727070A CN115113088A CN 115113088 A CN115113088 A CN 115113088A CN 202210727070 A CN202210727070 A CN 202210727070A CN 115113088 A CN115113088 A CN 115113088A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/30—Measuring the maximum or the minimum value of current or voltage reached in a time interval
Abstract
The invention discloses a load current testing device, a power supply and a server, and relates to the field of power supply detection. The power supply detection device comprises a signal generation module, a driving module, a controllable switch and a resistor, wherein the signal generation module is connected with a first input end of the driving module, an output end of the driving module is connected with a control end of the controllable switch, a first end of the controllable switch is connected with a power supply to be detected, a second end of the controllable switch is respectively connected with a first end of the resistor and a second input end of the driving module, and a second end of the resistor is grounded; the drive module controls the switching-on speed of the controllable switch according to the voltage of the signal generation module and the feedback voltage of the resistor so that the current change speed of the resistor meets the current change speed of the load current test, and the voltage is still in a preset voltage range, namely the output current of the power supply can be changed instantaneously.
Description
Technical Field
The invention relates to the field of power supply detection, in particular to a load current testing device, a power supply and a server.
Background
Because the power supply supplies power to each module of the server, the power supply plays a crucial role in the server, before the power supply is used for supplying power, a performance test is firstly carried out, one of the important tests is a load current test for testing whether the power supply has stable output, the test is carried out under the condition that the output current of the power supply can be instantly increased from a few amperes to hundreds of amperes, namely the lowest value to the highest value of the current range on a parameter table of the power supply, because the load current test requires the output current of the power supply to be instantly increased from a few amperes to hundreds of amperes, a test device special for a laboratory cannot meet the required test slope, and because the slope cannot meet the requirement, even if the current value can be increased from the lowest value to the highest value of a specification, the test cannot be instantly completed, and a certain time is required, the existing test mode does not have the basic load current test condition, the pull-load current test of the power supply cannot be achieved.
Disclosure of Invention
The invention aims to provide a load current testing device, a power supply and a server, which have basic load current testing conditions and can achieve load current testing of the power supply.
In order to solve the technical problem, the invention provides a load current testing device, which comprises a signal generating module, a driving module, a controllable switch and a resistor, wherein the signal generating module is connected with a first input end of the driving module, an output end of the driving module is connected with a control end of the controllable switch, a first end of the controllable switch is connected with a power supply to be detected, a second end of the controllable switch is respectively connected with a first end of the resistor and a second input end of the driving module, and a second end of the resistor is grounded;
the driving module is used for correspondingly controlling the opening angle of the controllable switch and controlling the opening speed of the controllable switch according to the voltage of the signal generating module and the feedback voltage of the resistor so as to control the magnitude and the change speed of the output current of the power supply to be detected, and the voltage of the signal generating module is positively correlated with the output current of the power supply to be detected;
the signal generation module is used for providing a voltage with a slope not less than a preset voltage slope and a voltage value within a preset voltage range for the first input end of the driving module.
Preferably, the load current testing device further includes an acquisition module, a first input end of the acquisition module is respectively connected to the first end of the resistor, the second end of the controllable switch and the second input end of the driving module, the second input end is connected to the second end of the resistor and grounded, and an output end is connected to the display module;
the acquisition module is used for acquiring the voltage at two ends of the resistor and outputting a current signal representing the power supply to be detected to the display module.
Preferably, the controllable switch is a MOS transistor.
Preferably, the driving module is specifically configured to, when the feedback voltage of the resistor is less than the voltage of the signal generating module, control the turn-on angle of the controllable switch to increase until the feedback voltage of the resistor is equal to the voltage of the signal generating module, and when the slope of the voltage of the signal generating module is not less than a preset voltage slope, control the current change speed of the resistor to meet the current change speed of the pull-up current test.
Preferably, the signal generating module is a signal generator.
Preferably, the driving module includes a first operational amplifier or a digital control chip.
Preferably, the acquisition module is a second operational amplifier.
Preferably, the number of the controllable switches is N, the number of the resistors is N, the control end of each controllable switch is connected to the output end of the driving module, the first end of each controllable switch is connected to the power source to be detected, the second end of each controllable switch is connected to the second input end of the driving module and the first end of each resistor corresponding to the controllable switch one by one, the second end of each corresponding resistor is grounded, and N is a positive integer.
In order to solve the technical problem, the invention further provides a power supply, which comprises a power supply body and the load current testing device, wherein the power supply is connected with the load current testing device.
In order to solve the technical problem, the invention further provides a server, which comprises the pull load current testing device.
The application discloses a load current testing device, a power supply and a server, which comprise a signal generating module, a driving module, a controllable switch and a resistor, wherein the signal generating module is connected with a first input end of the driving module, an output end of the driving module is connected with a control end of the controllable switch, a first end of the controllable switch is connected with a power supply to be detected, a second end of the controllable switch is respectively connected with a first end of the resistor and a second input end of the driving module, and a second end of the resistor is grounded; the signal generation module provides the voltage that the slope is not less than predetermineeing the voltage slope for drive module's first input among this application, drive module controls the speed of opening of controllable switch so that the current change speed of resistor satisfies the current change speed in the load current test according to the voltage of signal generation module and the feedback voltage of resistor, and this voltage still is in predetermineeing the voltage range, make the current of resistor have fixed scope, make the output current of power can the transient variation promptly, and can change in the current range of parameter table, this application possesses basic load current test condition, can reach the load current test of power.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pull-load current testing apparatus according to the present invention;
fig. 2 is a schematic structural diagram of another device for testing a pull-load current according to the present invention.
Detailed Description
The core of the invention is to provide a load current testing device, a power supply and a server, which have basic load current testing conditions and can achieve load current testing of the power supply.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a pull-load current testing device provided in the present invention.
The device includes:
the power supply detection device comprises a signal generation module 1, a driving module 2, a controllable switch 3 and a resistor 4, wherein the signal generation module 1 is connected with a first input end of the driving module 2, an output end of the driving module 2 is connected with a control end of the controllable switch 3, a first end of the controllable switch 3 is connected with a power supply to be detected, a second end of the controllable switch 3 is respectively connected with a first end of the resistor 4 and a second input end of the driving module 2, and a second end of the resistor 4 is grounded;
the driving module 2 is used for correspondingly controlling the opening angle of the controllable switch 3 and the opening speed of the controllable switch 3 according to the voltage of the signal generating module 1 and the feedback voltage of the resistor 4 so as to control the magnitude and the change speed of the output current of the power supply to be detected, and the voltage of the signal generating module 1 is positively correlated with the output current of the power supply to be detected;
the signal generating module 1 is configured to provide a voltage with a slope not less than a preset voltage slope and a voltage value within a preset voltage range for the first input end of the driving module 2.
Before a power supply is used for supplying power, firstly, a load current test needs to be carried out on the power supply, the load current test has to have the condition that the output current of the power supply can be instantly increased from the lowest value to the highest value of the current of a parameter table of self specification, the load current test device of the application provides the first input end of the driving module 2 with the voltage of which the slope is not less than the preset voltage slope and the voltage value is in the preset voltage range through the signal generating module 1, then the driving module 2 controls the opening angle of the controllable switch 3 and the opening speed of the controllable switch 3 according to the voltage of the signal generating module 1 and the feedback voltage of the resistor 4 correspondingly so as to control the magnitude and the change speed of the output current of the power supply to be detected, wherein the magnitude of the output current of the power supply to be detected is related to the voltage value provided by the signal generating module 1 and the feedback voltage of the resistor 4, the higher the voltage value provided by the signal generating module 1 is, the larger the output current of the power supply is, so that the different voltage values provided by the signal generating module 1 can make the output current of the power supply to be detected reach the lowest value and the highest value of the current of the parameter table of the self specification, in addition, the change speed of the output current of the power supply to be detected is related to the slope of the voltage of the signal generating module 1, the larger the slope is, the faster the change speed is, so that when the slope of the voltage is not less than the preset voltage slope, the change speed of the output current of the power supply to be detected meets the basic condition of a load-pull current test, and the feasibility of the scheme is improved.
Specifically, the voltage provided by the signal generating module 1 is input to the first input terminal of the driving module 2, when the slope of the voltage increases, the driving module 2 controls the turn-on speed of the controllable switch 3 to increase, and because the turn-on degrees of the controllable switch 3 are different, the self resistance values are different, so that eventually the current of the resistor 4 changes, i.e. the output current of the power supply changes, with a slope larger than the preset voltage slope, the change speed of the current can meet the instantaneous change of the current load test, the load current test can be realized by utilizing the device, meanwhile, the magnitude of the voltage also affects the magnitude of the current, the voltage of the signal generation module 1 is positively correlated with the input current of the power supply, therefore, the change of the output current of the power supply can be controlled based on the voltage value, so that the output current can be increased from the lowest value to the highest value of the specification, and the reliability of the scheme is improved.
The power supply to be detected can be but not limited to a Direct Current-Direct Current (DC-DC) power supply for supplying power to a chip, the signal generation module 1 generates trapezoidal waves with adjustable amplitude, slope, frequency and duty ratio and inputs the trapezoidal waves into the driving module 2 to enhance driving capability, the controllable switch 3 is a device with adjustable switching-on speed and switching-on degree, namely the controllable switch 3 is in more than two states of on and off, the switch can be completely switched on after being completely switched on, the switching-on of the switch in different degrees can have resistance values with different sizes, when the switch is partially switched on, the two ends of the resistor 4 can have voltage drop to generate Current, the voltage value at the front end of the resistor 4 can also be fed back to the input end of the driving module 2 at the same time, the output of the driving module 2 is controlled together with the signal generation module 1, and the completeness of the scheme is improved.
In summary, the application discloses a load current testing device, which comprises a signal generating module 1, a driving module 2, a controllable switch 3 and a resistor 4, wherein the signal generating module 1 is connected with a first input end of the driving module 2, an output end of the driving module 2 is connected with a control end of the controllable switch 3, a first end of the controllable switch 3 is connected with a power source to be detected, a second end of the controllable switch 3 is respectively connected with a first end of the resistor 4 and a second input end of the driving module 2, and a second end of the resistor 4 is grounded; in the application, the signal generation module 1 provides a voltage with a slope not less than a preset voltage slope for the first input end of the driving module 2, the driving module 2 controls the switching-on speed of the controllable switch 3 according to the voltage of the signal generation module 1 and the feedback voltage of the resistor 4 so that the current change speed of the resistor 4 meets the current change speed of the load current test, and the voltage is still in a preset voltage range, so that the current of the resistor 4 has a fixed range, namely, the output current of the power supply can change instantaneously, and can change in the current range of the parameter table.
On the basis of the above-described embodiment:
referring to fig. 2, fig. 2 is a schematic structural diagram of another pull-load current testing apparatus provided in the present invention.
As a preferred embodiment, the pull-load current testing device further includes an acquisition module 5, a first input end of the acquisition module 5 is respectively connected to a first end of the resistor 4, a second end of the controllable switch 3, and a second input end of the driving module 2, the second input end is connected to the second end of the resistor 4 and grounded, and an output end is connected to the display module;
the acquisition module 5 is used for acquiring the voltage at two ends of the resistor 4 and outputting a current signal representing the power supply to be detected to the display module.
The acquisition module 5 is connected to two ends of the resistor 4, acquires the voltage at two ends of the resistor 4 and outputs a current signal representing the power supply to be detected to the display module so as to be convenient for a user to check, and after the user checks through the display module, the user can observe the actual current waveform and other related information about the current waveform, so that the user can know the specific condition of the output current of the power supply, and whether the power supply meets the specification or not is judged.
In addition, the display module may be, but not limited to, an oscilloscope, and may also be another device that can display the waveform of the output current and related information.
As a preferred embodiment, the controllable switch 3 is a MOS transistor.
The controllable switch 3 can be but not limited to an MOS transistor, and the driving module 2 controls the turn-on angle and the turn-on speed of the MOS transistor according to the voltage of the signal generating module 1 and the feedback voltage of the resistor 4, so as to control the magnitude and the change speed of the output current of the power supply to be detected.
The controllable switch 3 may also be a PSMN1R0-30YLD, which is not limited herein.
As a preferred embodiment, the driving module 2 is specifically configured to control the on angle of the controllable switch 3 to increase until the feedback voltage of the resistor 4 is equal to the voltage of the signal generating module 1 when the feedback voltage of the resistor 4 is less than the voltage of the signal generating module 1, and control the current change speed of the resistor 4 to meet the current change speed of the pull-load current test when the slope of the voltage of the signal generating module 1 is not less than the preset voltage slope.
Specifically, when the feedback voltage of the resistor 4 is smaller than the voltage of the signal generating module 1, the driving module 2 may continuously send a signal for controlling the increase of the opening angle of the controllable switch until the feedback voltage of the resistor 4 is equal to the voltage of the signal generating module 1, and at this time, the opening angle of the controllable switch 3 is controlled to be unchanged, because the required current is obtained at this time, when the voltage value of the signal generating module 1 is set to be a fixed value, the voltage at the upper end of the resistor 4 may reach the value at most, and the output current of the power supply is the ratio of the voltage value to the resistance value of the resistor 4, so that the output current of the power supply is controllable.
Specifically, when the slope of the voltage of the signal generating module 1 is not less than the preset voltage slope, the turn-on speed of the controllable switch 3 is controlled to reach a certain speed, and then the resistance value of the controllable switch 3 changes to reach a certain speed, so that the current change speed of the resistor 4 meets the current change speed of the load current test. So that the device can have the condition of load current test.
As a preferred embodiment, the signal generating module 1 is a signal generator.
The signal generator provides the first input end of the driving module 2 with the voltage with the slope not less than the preset voltage slope and the voltage value within the preset voltage range, and different types of signal generators can be selected, so long as different slopes and voltages with different sizes can be provided, and the flexibility of the scheme is improved.
As a preferred embodiment, the driving module 2 comprises a first operational amplifier or a digital control chip.
The driving module 2 may not be limited to use the first operational amplifier or the digital control chip, and may also select another device that can control the turn-on angle of the controllable switch 3 and the turn-on speed of the controllable switch 3 according to the voltage of the signal generating module 1 and the feedback voltage of the resistor 4, so as to control the magnitude and the change speed of the output current of the power source to be detected, thereby improving the flexibility and the feasibility of the scheme.
In a preferred embodiment, the acquisition module 5 is a second operational amplifier.
The acquisition module 5 may be, but not limited to, a second operational amplifier, or another device that can acquire the voltage across the resistor 4 and output a current signal representing the power source to be detected to the display module, thereby improving the flexibility and reliability of the scheme.
In addition, the selection of the operational amplifier can play a role in voltage amplification, so that the accuracy and the precision of the scheme can be improved, and the reliability of the scheme can be improved.
As a preferred embodiment, the number of the controllable switches 3 is N, the number of the resistors 4 is N, the control end of each controllable switch 3 is connected to the output end of the driving module 2, the first end of each controllable switch is connected to the power source to be detected, the second end of each controllable switch is connected to the second input end of the driving module 2 and the first end of each resistor 4 corresponding to the controllable switch 3 one by one, the second end of each corresponding resistor 4 is grounded, and N is a positive integer.
The number of the controllable switches 3 and the resistors 4 can be adjusted adaptively, and as the output current of the required power supply is possibly very large, one group of the resistors 4 and the controllable switches 3 may not meet the requirement of larger output current, so that a mode of connecting a plurality of groups of the controllable switches 3 and the resistors 4 in parallel is selected, after the resistors are connected in parallel, the integral resistance value is reduced, the total current of the circuit can be increased, namely the output current of the power supply is increased, and the reliability and the flexibility of the scheme are improved.
In addition, the number of the controllable switches 3 is N, the number of the resistors 4 is N, and the actual number can be changed according to actual conditions and requirements, so that the output current of the finished power supply can be increased from the lowest value to the highest value of the specification.
The invention also provides a power supply, which comprises a power supply body and the load current testing device, wherein the power supply is connected with the load current testing device.
For the introduction of the power supply provided by the present invention, please refer to the above embodiments of the pull-up current testing apparatus, which are not described herein again.
The invention also provides a server which comprises the pull-load current testing device.
For the description of the server provided by the present invention, please refer to the above embodiments of the pull-load current testing apparatus, which are not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
Claims (10)
1. A load current testing device is characterized by comprising a signal generating module, a driving module, a controllable switch and a resistor, wherein the signal generating module is connected with a first input end of the driving module, an output end of the driving module is connected with a control end of the controllable switch, a first end of the controllable switch is connected with a power supply to be detected, a second end of the controllable switch is respectively connected with a first end of the resistor and a second input end of the driving module, and a second end of the resistor is grounded;
the driving module is used for correspondingly controlling the opening angle of the controllable switch and controlling the opening speed of the controllable switch according to the voltage of the signal generating module and the feedback voltage of the resistor so as to control the magnitude and the change speed of the output current of the power supply to be detected, and the voltage of the signal generating module is positively correlated with the output current of the power supply to be detected;
the signal generation module is used for providing a voltage with a slope not less than a preset voltage slope and a voltage value within a preset voltage range for the first input end of the driving module.
2. The device for testing the pull-up current according to claim 1, further comprising an acquisition module, wherein a first input terminal of the acquisition module is connected to the first end of the resistor, the second end of the controllable switch and the second input terminal of the driving module, respectively, a second input terminal of the acquisition module is connected to the second end of the resistor and grounded, and an output terminal of the acquisition module is connected to the display module;
the acquisition module is used for acquiring the voltage at two ends of the resistor and outputting a current signal representing the power supply to be detected to the display module.
3. The device for testing the pull-up current according to claim 1, wherein the controllable switch is a MOS transistor.
4. The device for testing a pull-up current according to claim 1, wherein the driving module is specifically configured to, when the feedback voltage of the resistor is less than the voltage of the signal generating module, control the turn-on angle of the controllable switch to increase until the feedback voltage of the resistor is equal to the voltage of the signal generating module, and control the current change speed of the resistor to meet the current change speed of the pull-up current test when the slope of the voltage of the signal generating module is not less than a preset voltage slope.
5. The device for testing the pull-up current according to claim 1, wherein the signal generating module is a signal generator.
6. The pull-up current test device of claim 1, wherein the driving module comprises a first operational amplifier or a digital control chip.
7. The device for testing the pull-up current according to claim 1, wherein the acquisition module is a second operational amplifier.
8. The device according to any one of claims 1 to 7, wherein the number of the controllable switches is N, the number of the resistors is N, the control terminal of each controllable switch is connected to the output terminal of the driving module, the first terminal is connected to the power source to be tested, the second terminal is connected to the second input terminal of the driving module and the first terminal of the resistor corresponding to the controllable switch, respectively, the second terminal of the corresponding resistor is grounded, and N is a positive integer.
9. A power supply comprising a power supply body and further comprising a pull-up current test device according to any one of claims 1 to 8, the power supply being connected to the pull-up current test device.
10. A server, characterized by comprising the pull-up current testing device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210727070.1A CN115113088A (en) | 2022-06-24 | 2022-06-24 | Load current testing device, power supply and server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210727070.1A CN115113088A (en) | 2022-06-24 | 2022-06-24 | Load current testing device, power supply and server |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115113088A true CN115113088A (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210727070.1A Pending CN115113088A (en) | 2022-06-24 | 2022-06-24 | Load current testing device, power supply and server |
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| Country | Link |
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| CN (1) | CN115113088A (en) |
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- 2022-06-24 CN CN202210727070.1A patent/CN115113088A/en active Pending
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