CN110635691A - Current source module - Google Patents
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- CN110635691A CN110635691A CN201910806658.4A CN201910806658A CN110635691A CN 110635691 A CN110635691 A CN 110635691A CN 201910806658 A CN201910806658 A CN 201910806658A CN 110635691 A CN110635691 A CN 110635691A
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a current source module, comprising: the inverter unit is used for converting the input direct current into alternating current; the current adjusting unit is used for converting the alternating current output by the inverting unit into a first alternating current and a second alternating current with the same magnitude; and the rectifying unit is used for converting the first alternating current and the second alternating current output by the current adjusting unit into a first direct current and a second direct current with the same magnitude respectively. The current source module converts the input small current into large current, and the large current is superposed on the PDU product to simulate the large current of the PDU product during working and test and burn-in the PDU product, so that the energy loss in the test and burn-in processes is reduced.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a current source module.
Background
The intelligent PDU (Power Distribution Unit) is also called a remote power manager, an IP power supply, an intelligent power supply and a rack type power Distribution unit, and has the functions of power Distribution and management. The intelligent PDU can monitor parameters such as power supply voltage, power supply voltage frequency and each path of output current, and can also realize remote control, centralized management, automatic cycle control, safety management, reliability management and the like. Compared with the traditional PDU, the intelligent management system can provide a network management interface, is not a single conductive product, is a new generation power management system which is specially developed for a data center and remotely manages network equipment and server groups, and is an intelligent management system for terminal power distribution.
The extensive application of intelligence PDU can also reduce the human cost by a wide margin, improves the operating efficiency. At present, most machine rooms adopt an unattended operation mode, and once equipment failure occurs, the service cannot be operated for a long time, so that serious loss is brought. Remote monitoring and control can be realized to intelligence PDU product, and through configuration corresponding remote power management software, fortune dimension personnel can utilize local area network or wide area network, detect, control and manage the multiple equipment power of computer lab, the rack that distributes in each place, practices thrift the human cost effectively. The intelligent power management solution enables a user to more accurately and effectively monitor power consumption, manage and control equipment operation and monitor a machine room environment.
At present, more and more IDC type enterprises, security bank type enterprises, high-efficiency, municipal administration, medical treatment and electric power type units put intelligent PDU into use, and the application range and the scale of the intelligent PDU are rapidly expanded. With the expansion of the application range and scale of the intelligent PDU, the quality requirement of the intelligent PDU product in the industry is higher and higher. The quality requirement of the industry on intelligent PDU products is quite high, the intelligent PDU finished product test must be strictly treated, the intelligent PDU finished product test is very strict, all finished products must be tested in one hundred percent, and the intelligent PDU finished product test method specifically comprises three steps of a function test, a voltage withstanding test and a power-on test.
The traditional test of the high-voltage high-current intelligent distribution box A2 basically adopts a mode of directly connecting a high-power high-voltage direct-current power supply A1 and connecting the output of the high-power high-current power supply A1 with a high-power load RL, and the principle of the test is shown in figure 1.
According to analysis, the method is simple and easy to implement and intuitive in test, but the problem of particularly large power loss exists when a high-voltage large-current high-power direct-current power supply is directly connected to the input end of a PDU product. In test aging of PDU products, more than 90% of the energy is actually consumed by the back-stage load. Therefore, how to convert a low-current power supply into a high-current power supply and use the low-current power supply to perform a high-current test on a device under test becomes an urgent problem to be solved.
Disclosure of Invention
In order to solve the above problems, the present invention provides a current source module, which converts an input small current into a large current to simulate the large current of a device under test during operation, thereby achieving the purpose of testing the large current of the device under test by using a small current power supply.
A current source module comprising:
the inverter unit is used for converting the input direct current into alternating current;
the current adjusting unit is used for converting the alternating current output by the inverting unit into a first alternating current and a second alternating current with the same magnitude;
and the rectifying unit is used for converting the first alternating current and the second alternating current output by the current adjusting unit into a first direct current and a second direct current with the same magnitude respectively.
Preferably, the inverter unit includes a full bridge inverter circuit, wherein,
and the output end of the full-bridge inverter circuit is connected with the input end of the current adjusting unit.
Preferably, the full-bridge inverter circuit is composed of four switching tubes, and is used for realizing conversion from alternating current to direct current by controlling the on and off of the switching tubes.
Preferably, the switching tube includes a MOS tube and an IGBT.
Preferably, the current adjusting unit includes a first transformer T1, a second transformer T2,
and the primary coil of the first transformer T1 and the primary coil of the second transformer T2 are connected in series and then are connected with the output end of the inverter unit.
Preferably, the first transformer T1 and the second transformer T2 have the same parameters.
Preferably, the rectifying unit comprises a first rectifying circuit and a second rectifying circuit, the first rectifying circuit is the same as the second rectifying circuit,
the input end of the first rectifying circuit is connected with the secondary coil of the first transformer T1;
the input end of the second rectifying circuit is connected with the secondary coil of the second transformer T2.
Preferably, the first rectification circuit and the second rectification circuit are both bridge rectification circuits.
Preferably, the rectifying unit further comprises a first filter circuit and a second filter circuit, wherein,
the first filtering circuit is connected with the first rectifying circuit and is used for filtering the first direct current output by the first rectifying circuit;
the second filter circuit is connected with the second rectifying circuit and is used for filtering the second direct current output by the second rectifying circuit.
Preferably, the first filter circuit and the second filter circuit are LC filter circuits.
The current source module converts a direct current power supply into alternating current high-frequency pulses, transfers energy to the secondary coil through the transformer, then rectifies and filters the alternating current high-frequency pulses through two groups of identical rectifying and filtering circuits, outputs two paths of direct current high currents with the same size and complementary positive and negative, and is connected in series to the positive loop and the negative loop of the device to be tested to simulate the high current work of the device to be tested, so that the aim of testing the high current of the device to be tested by using a low-current power supply is fulfilled.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a test schematic diagram of a PDU using a conventional test method;
FIG. 2 is a circuit diagram of a current source module according to the present invention;
fig. 3 is a schematic diagram of the connection between the current source module and the PDU to be tested according to the present invention.
FIG. 4 is a schematic diagram of the test of the current source module for PDU testing according to the present invention.
Detailed Description
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 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 invention.
Referring to fig. 2, the present embodiment discloses a current source module, which is combined with a dc power supply to convert a small current output from the dc power supply into two first dc currents I with the same current valueaAnd a second direct current IbThe device to be tested is connected in series to the positive loop and the negative loop of the device to be tested respectively to simulate the heavy current work of the device to be tested, and the purpose of testing the heavy current of the device to be tested by using a low-current power supply is achieved.
Specifically, the current source module is composed of an inverter unit, a current adjusting unit and a rectifying unit. The input end of the inversion unit is connected with the output end of the direct current power supply, the output end of the inversion unit is connected with the input end of the current adjusting unit, and the output end of the current adjusting unit is connected with the rectifying unit. Wherein, the output end of the rectifying unit comprises a first output end A and a second output end B which respectively output a first direct current IaA second direct current Ib. The inversion unit converts direct current input by the input end into alternating current; the current adjusting unit converts the alternating current output by the inverting unit from high-voltage small current into two paths of equal low-voltage large-current first alternating current and second alternating current; the rectifying unit converts two paths of equal first alternating current and second alternating current output by the current adjusting unit into equal first direct current I respectivelyaA second direct current Ib。
Specifically, the inverter unit in this embodiment adopts a full-bridge inverter circuit, wherein an output terminal of the full-bridge inverter circuit is connected to an input terminal of the current adjusting unit. The direct current input by the full-bridge inverter circuit is received and converted by the full-bridge inverter circuit to obtain alternating current.
Each bridge arm of the full-bridge inverter circuit comprises a switching tube, and the switching tube is controlled to be switched on and off to realize the conversion from alternating current to direct current. The switch tube can adopt IGBT, MOS tube and the like. The present embodiment takes a MOS transistor as an example to perform the following exemplary description:
the full-bridge inverter circuit comprises a first bridge arm switching tube Q1, a second bridge arm switching tube Q2, a third bridge arm switching tube Q3 and a fourth bridge arm switching tube Q4, wherein,
the source electrode of the first bridge arm switching tube Q1 and the drain electrode of the second bridge arm switching tube Q2 are connected to a first output point, and the source electrode of the third bridge arm switching tube Q3 and the drain electrode of the fourth bridge arm switching tube Q4 are connected to a second output point;
the drain of the first arm switch Q1 and the drain of the third arm switch Q3 are connected to a first input point, and the source of the second arm switch Q2 and the source of the fourth arm switch Q4 are connected to a second input point.
The types of the first bridge arm switching tube Q1, the second bridge arm switching tube Q2, the third bridge arm switching tube Q3 and the fourth bridge arm switching tube Q4 are the same.
Specifically, the current adjusting unit of this embodiment includes a first transformer T1, a second transformer T2, a primary coil of the first transformer T1 is connected in series with a primary coil of the second transformer T2, and then connected in series to an output terminal of the inverter unit,the inverter unit forms a closed loop with a primary coil of the first transformer T1 and a primary coil of the second transformer T2, and a secondary coil of the first transformer T1 and a secondary coil of the second transformer T2 output a first alternating current and a second alternating current, respectively. The primary coil of the first transformer T1 is connected in series with the primary coil of the second transformer T2, so that the current passing through the primary coil of the first transformer T1 is the same as the current passing through the primary coil of the second transformer T2, and the high-voltage small current input by the first transformer T1 and the second transformer T2 is converted into the low-voltage large current through the coupling of the primary coils of the first transformer T1 and the second transformer T2 and the secondary coil. In order to make the first direct current I output by the current source moduleaA second direct current IbThe sizes are equal, and the parameters of the first transformer T1 and the second transformer T2 are the same. Under the condition that the parameters of the first transformer T1 and the second transformer T2 are the same, the first alternating current passing through the secondary coil of the first transformer T1 is also the same as the second alternating current passing through the secondary coil of the second transformer T2, so that the two groups of rectifying units output currents with the same magnitude.
Specifically, the rectifying unit described in this embodiment is composed of a first rectifying circuit and a second rectifying circuit. The input end of the first rectifying circuit is connected with the output end of the secondary coil of the first transformer T1; the input end of the second rectifying circuit is connected with the output end of the secondary coil of the second transformer T2. The first rectifying circuit rectifies a current output from the secondary winding of the first transformer T1, and the second rectifying circuit rectifies a current output from the secondary winding of the second transformer T2. In order to make the first direct current I output by the current source moduleaA second direct current IbThe sizes of the first rectifying circuit and the second rectifying circuit are equal, and the structure and the parameters of each component are completely the same.
Specifically, the first rectification circuit and the second rectification circuit are both bridge rectification circuits. The bridge rectifier circuit of the first rectifier circuit is composed of a first diode D1-1, a second diode D1-2, a third arm diode D1-3 and a fourth arm diode D1-4. The bridge rectifier circuit of the second rectifier circuit is composed of a first diode D2-1, a second diode D2-2, a third diode D2-3 and a fourth diode D2-4.
The rectifying unit further comprises a first filter circuit and a second filter circuit, wherein the input end of the first filter circuit is connected with the output end of the first rectifying circuit and is used for filtering the first direct current output by the first rectifying circuit, and the output end of the first filter circuit is connected in series with the positive circuit of the device to be tested; the input end of the second filter circuit is connected with the output end of the second rectifier circuit and used for filtering the second direct current output by the second rectifier circuit, and the output end of the second filter circuit is connected in series with a negative pole loop of the device to be tested.
The filter circuit described in this embodiment may adopt an inductance filter circuit or a capacitance filter circuit, but in order to obtain a better filter effect, this embodiment adopts an LC filter circuit, that is, the first filter circuit is composed of an inductance L1 and a capacitance C1, and the second filter circuit is composed of an inductance L2 and a capacitance C2.
In summary, the full-bridge inverter circuit composed of Q1, Q2, Q3, and Q4 in this embodiment converts the input dc power into ac high-frequency pulses, transfers energy to the secondary coil through the transformers T1 and T2, and then filters the ac high-frequency pulses through two identical rectifier filter circuits composed of D1-1 to D1-4, L1, C1, D2-1 to D2-4, L2, and C2, outputs two paths of dc power, and respectively accesses the positive and negative loops of the device under test, so as to completely simulate the working condition of the device under test at high current, and achieve the purpose of testing the device under test at high current by using the low-current power.
The full-bridge inverter circuit composed of Q1, Q2, Q3 and Q4 described in this embodiment converts an input dc power supply into ac high-frequency pulses, transfers energy to a secondary coil through transformers T1 and T2, and then filters the ac high-frequency pulses through two identical rectifier and filter circuits composed of D1-1-D1-4, L1, C1, D2-1-D2-4, L2 and C2, outputs two paths of dc high currents, and respectively accesses two positive and negative loops of a PDU to be tested, so that the condition of a PDU product in high-current operation can be completely simulated, and high-current testing and aging can be performed. The current source module described in this embodiment is combined with a dc power supply to simulate the PDU to perform a high current and high voltage operation. Compared with the traditional PDU test mode, the application of the current source module enables the generation of high voltage and large current in the PDU test and aging process to be converted from a high-power high-voltage direct-current power supply into a low-power high-voltage power supply and a low-power large-current double-path current source, and the rear-stage high-power load is saved, so that the manufacturing cost of the whole test system is greatly reduced, and the energy loss in the test and aging process is greatly reduced.
In the process of applying the current source module to the PDU test, the connection relation among the direct current power supply, the current source module and the PDU to be tested is as follows:
the current source module may be applied to a plurality of devices, and the following exemplary description describes an application of the current source module in the PDU testing device according to this embodiment.
Referring to fig. 3 and 4, in the PDU test process, the dc power supply unit is connected to an input terminal of the PDU to be tested to provide a high voltage to the PDU, and the dc power supply unit uses a low-power high-voltage dc power supply. The input end of the current source module is connected with the output end of the second direct current power supply unit, and the current source module is supplied with current by the second direct current power supply unit. The current source module converts the input small current into two first direct currents I with equal magnitudeaAnd a second direct current IbAnd the first direct current and the second direct current are respectively output from a first output end A and a second output end B of the current source module. And the PDU output end to be tested is connected with a low-power load RL. The first output end A of the current source module is connected with the positive circuit of the PDU to be tested in series, the second output end B is connected with the negative circuit of the PDU to be tested in series, and the specific connection relation is as follows:
the positive pole of the output end Vo + and the negative pole of the output end Vo-of the direct current power supply unit are respectively connected with the positive pole of the input end V of the PDU to be testedin+, negative pole V of input endin-connecting;
the positive electrode V of the output end of the second direct-current power supply unito+, negative pole V of output endo-positive pole V of input terminal of said current source module respectivelyin+, and defeatedNegative electrode V at input endin-connecting;
the first output end anode a2 of the current source module and the input end anode V of the PDU to be testedin+ connected, the negative pole a1 of the first output end and the positive pole V of the output end of the PDU to be tested2O+ connection;
the second output end positive pole b2 of the current source module and the output end negative pole V of the PDU to be tested2O-connection, second output terminal negative b1 with input terminal negative V of PDU under testin-connecting.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A current source module, comprising:
the inverter unit is used for converting the input direct current into alternating current;
the current adjusting unit is used for converting the alternating current output by the inverting unit into a first alternating current and a second alternating current with the same magnitude;
and the rectifying unit is used for converting the first alternating current and the second alternating current output by the current adjusting unit into a first direct current and a second direct current with the same magnitude respectively.
2. The current source module of claim 1, wherein the inverter unit comprises a full-bridge inverter circuit, wherein,
and the output end of the full-bridge inverter circuit is connected with the input end of the current adjusting unit.
3. The current source module of claim 2, wherein the full-bridge inverter circuit is composed of four switching tubes,
the switching tube is used for controlling the on-off of the switching tube to realize the conversion from alternating current to direct current.
4. The current source module of claim 3, wherein the switching tube comprises a MOS tube and an IGBT.
5. The current source module of any one of claims 1 to 4, wherein the current adjusting unit comprises a first transformer T1, a second transformer T2,
and the primary coil of the first transformer T1 and the primary coil of the second transformer T2 are connected in series and then are connected with the output end of the inverter unit.
6. The current source module of claim 5, wherein the first transformer T1 and the second transformer T2 are identical in parameters.
7. The current source module of claim 6, wherein the rectifying unit comprises a first rectifying circuit, a second rectifying circuit, the first rectifying circuit being identical to the second rectifying circuit,
the input end of the first rectifying circuit is connected with the secondary coil of the first transformer T1;
the input end of the second rectifying circuit is connected with the secondary coil of the second transformer T2.
8. The current source module of claim 7, wherein the first and second rectifying circuits are bridge rectifying circuits.
9. The current source module of claim 8, wherein the rectifying unit further comprises a first filter circuit, a second filter circuit, wherein,
the first filtering circuit is connected with the first rectifying circuit and is used for filtering the first direct current output by the first rectifying circuit;
the second filter circuit is connected with the second rectifying circuit and is used for filtering the second direct current output by the second rectifying circuit.
10. The current source module of claim 9, wherein the first and second filter circuits are LC filter circuits.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112067865A (en) * | 2020-09-14 | 2020-12-11 | 南方电网科学研究院有限责任公司 | Current source device and direct current fill electric pile check gauge calibrating installation |
| AT523343A1 (en) * | 2020-01-10 | 2021-07-15 | Omicron Electronics Gmbh | High-current source for a test system for testing an electrical energy device and test system |
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| CN110635691B (en) | 2021-06-29 |
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