CN110673054B - DC/DC power supply test system and aging test method of DC/DC power supply - Google Patents
DC/DC power supply test system and aging test method of DC/DC power supply Download PDFInfo
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- CN110673054B CN110673054B CN201910945776.3A CN201910945776A CN110673054B CN 110673054 B CN110673054 B CN 110673054B CN 201910945776 A CN201910945776 A CN 201910945776A CN 110673054 B CN110673054 B CN 110673054B
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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
Abstract
A DC/DC power supply test system comprises a power supply module, a load module, a test host and a plurality of paths of first switch circuits with the same number as that of a plurality of paths of DC/DC power supplies to be tested. The output end of the power supply module is respectively connected with the input ends of the multiple first switch circuits, and the output ends of the multiple first switch circuits are used for being respectively connected with the input ends of the multiple DC/DC power supplies to be tested in a one-to-one correspondence mode. The load module comprises a plurality of inverters, and the input ends of the plurality of inverters are used for being respectively connected with the output ends of the plurality of DC/DC power supplies to be tested in a one-to-one correspondence mode. The test host machine is communicated with the multi-path DC/DC power supply to be tested and the multi-path inverter respectively through the bus. The invention also provides an aging test method of the DC/DC power supply. The invention has high test efficiency, good use safety and high electric energy utilization rate, and can be conveniently and flexibly suitable for testing DC/DC power supplies of different models.
Description
Technical Field
The invention relates to a DC/DC power supply testing technology.
Background
At present, factory detection of a DC/DC power supply mainly depends on manual measurement, and therefore the DC/DC power supply testing device is low in testing efficiency and poor in accuracy of testing results. In order to solve such problems, some DC/DC power testing systems are introduced in the market, which have improved testing efficiency and accuracy of testing results compared with the conventional manual monitoring method, but have the following disadvantages:
1. most of the existing DC/DC power supply test systems adopt resistors as loads of DC/DC power supplies to be tested, if the types of the DC/DC power supplies to be tested are different (namely the output voltages of the DC/DC power supplies are different), the loads with different resistance values must be replaced, time and labor are wasted, the test efficiency is influenced, and in addition, the energy consumed by the resistors cannot be recycled, so that the electric energy utilization rate of the test system is lower;
2. most of the existing DC/DC power supply test systems can only monitor one group of DC/DC power supplies in real time, and some of the existing DC/DC power supply test systems need to arrange a specially-assigned person to watch and monitor software, so that not only is manpower wasted, but also the test efficiency needs to be improved;
3. because of the strong electricity in the testing process, the safety of the testing personnel is difficult to ensure.
Disclosure of Invention
The invention aims to provide a test system which has high test efficiency, good use safety and high electric energy utilization rate and can be conveniently and flexibly suitable for testing DC/DC power supplies of different models.
Another technical problem to be solved by the present invention is to provide a method for burn-in test of a DC/DC power supply.
According to one aspect of the invention, a DC/DC power supply test system is provided, which comprises a power supply module, a load module and a test host, wherein the DC/DC power supply test system comprises a plurality of paths of first switch circuits with the same number as that of a plurality of paths of DC/DC power supplies to be tested; the output end of the power supply module is respectively connected with the input ends of the multiple paths of first switch circuits, the output ends of the multiple paths of first switch circuits are used for being respectively connected with the input ends of multiple paths of DC/DC power supplies to be tested in a one-to-one correspondence manner, and the power supply module is used for supplying voltage to the multiple paths of DC/DC power supplies to be tested; the load module comprises a plurality of inverters, and the input ends of the plurality of inverters are used for being respectively connected with the output ends of a plurality of DC/DC power supplies to be tested in a one-to-one correspondence manner; the test host machine is communicated with the multi-path DC/DC power supply to be tested and the multi-path inverter respectively through the bus.
Furthermore, the multi-path inverters are equally divided into three groups, and the output ends of the three groups of inverters are respectively connected with the three live wires; the three live wires are electrically connected with three input ends of the power module in a one-to-one correspondence manner.
According to another aspect of the present invention, there is provided a burn-in test method of a DC/DC power supply, including the steps of:
a. connecting the input ends of the multi-path DC/DC power supplies to be tested with the output ends of the multi-path first switching circuits in a one-to-one correspondence manner, and connecting the output ends of the multi-path DC/DC power supplies to be tested with the input ends of the multi-path inverters in a one-to-one correspondence manner;
b. closing a first switch circuit connected with a first DC/DC power supply, setting a communication address for the first DC/DC power supply through a bus by a test host, and disconnecting the first switch circuit after the communication address is set;
c. calibrating the input voltage, the input current, the output voltage, the output current and the given output voltage of the first path of DC/DC power supply;
d. according to the operations of the step b and the step c, setting communication addresses for the rest of each path of DC/DC power supply in sequence, and calibrating the input voltage, the input current, the output voltage, the output current and the given output voltage of the rest of each path of DC/DC power supply;
e. setting a given output current value for the multi-channel inverter through a bus by a test host;
f. closing the multi-path first switch circuit to enable the multi-path DC/DC power supply to be tested and the multi-path inverter to be operated;
g. when the test host receives a fault signal sent by any DC/DC power supply to be tested, alarm information is sent outwards.
The invention has at least the following advantages:
1. the embodiment of the invention adopts the inverter as the load module, the test host can send instructions to the inverter through the bus, and the magnitude of the load impedance of the DC/DC power supply to be tested is changed by changing the output current of the inverter, so that the test system can be flexibly suitable for testing DC/DC power supplies of different models;
2. by adopting the DC/DC power supply testing system of the embodiment, the aging test of the DC/DC power supply can be carried out only by simply setting one tester, so that the operation is simple and the testing efficiency is high;
3. by utilizing the characteristics of long bus transmission distance and strong anti-interference capability, the DC/DC power supply can be remotely monitored, and the test safety is improved; the test host can automatically process faults or adverse reactions in the DC/DC power supply test process, and after the aging test is finished, the test host can control automatic power off, so that the safety coefficient is further improved;
4. the electric energy output by the inverter during working is transmitted to the input end of the power module, so that the cyclic utilization of the electric energy is realized, the waste of the electric energy is reduced, and the utilization rate of the electric energy is improved.
Drawings
FIG. 1 shows a schematic diagram of a DC/DC power supply test system according to an embodiment of the invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Please refer to fig. 1. The DC/DC power testing system according to an embodiment of the present invention includes a power module 1, a plurality of first switch circuits 21, a plurality of second switch circuits 22, a load module 3, and a testing host 4.
The plurality of first switch circuits 21 is the same as the plurality of DC/DC power supplies 9 to be tested. The output end of the power module 1 is connected with the input ends of the multiple first switch circuits 21, the output ends of the multiple first switch circuits 21 are used for being connected with the input ends of the multiple DC/DC power supplies 9 to be tested in a one-to-one correspondence manner, and the power module 1 is used for supplying voltage to the multiple DC/DC power supplies 9 to be tested.
In this embodiment, the power module 1 includes a rectifier bridge, an input end of the rectifier bridge is used for connecting to an external 380V ac power supply, and an output end of the rectifier bridge is used for connecting to the input ends of the multiple first switch circuits 21, respectively. Each of the first switch circuits 21 includes a contactor 211 and an air switch K1, and the contactor 211 is connected in series with the air switch K1. In other embodiments, only the contactor 211 may be provided.
The load module 3 comprises a plurality of inverters 31, and the input ends of the plurality of inverters 31 are used for being respectively connected with the output ends of the plurality of DC/DC power supplies 9 to be tested in a one-to-one correspondence manner. In this embodiment, the multiple inverters are equally divided into three groups, the output ends of the three groups of inverters 31 are respectively connected to the three live wires U, V, W, and the three live wires U, V, W are respectively electrically connected to the three input ends of the power module 1 in a one-to-one correspondence. The plurality of second switch circuits 22 respectively correspond to the plurality of inverters 31 one by one, and each inverter 31 is connected to the live wire through the corresponding second switch circuit 22.
In a specific application embodiment, a total of 9 inverters are provided, and three inverters are in a group. The second switching circuit 22 is a contactor. Alternating current electric energy output by the inverter 31 during operation is transmitted to the input end of the power module 1, so that the electric energy is recycled, the waste of the electric energy is reduced, and the utilization rate of the electric energy is improved. In other embodiments, the multiple inverters may be connected to multiple loads in a one-to-one correspondence, respectively, to provide ac power to the multiple loads.
Optionally, inverter 31 is a bi-directional inverter. The use of a bi-directional inverter may improve energy utilization.
Further, the output end of the test host 4 is connected to the control input end of the multiple first switch circuits 21 and the control input end of the multiple second switch circuits 22, respectively, so as to control on/off of each first switch circuit 21 and each second switch circuit 22.
The test host 4 communicates with the multiple DC/DC power supplies 9 to be tested and the multiple inverters 31, respectively, through the bus 5. In the present embodiment, the bus 5 is a CAN bus. The DC/DC power supply 9 to be tested is internally provided with a voltage sensor, a current sensor and a temperature sensor, can detect the input voltage, the input current, the output voltage, the output current and the working temperature of the DC/DC power supply 9, and sends the detection result to the test host 4 for the test host 4 to display. The DC/DC power supply 9 also signals a fault to the test master 4 if it finds that any of the input voltage, input current, output voltage, output current and operating temperature exceeds the respective preset threshold. Therefore, the test host 4 can monitor and store information such as overvoltage, undervoltage, overcurrent, overheat and the like of the DC/DC power supply 9 in real time. The test host 4 can send a command to the inverter 31 through the bus, and can change the magnitude of the load impedance of the DC/DC power supply to be tested by changing the output current of the inverter 31, so that the test host can flexibly adapt to the test of the DC/DC power supplies of different models. For example, when testing the DC/DC power supply 9 having an output voltage of 27.5V, the test host 4 sets the output current of each inverter 31 to be smaller, and when testing the DC/DC power supply 9 having an output voltage of 14V, the test host 4 sets the output current of each inverter 31 to be larger. For the bidirectional inverter, the test host 4 can also change the current direction of the bidirectional inverter, and effectively adjust the input voltage of the bidirectional inverter according to the energy requirement to realize regenerative feedback braking.
The DC/DC power supply testing system is adopted to carry out aging test on the DC/DC power supply 9, and comprises the following steps:
a. connecting the input ends of the multiple paths of DC/DC power supplies 9 to be tested with the output ends of the multiple paths of first switch circuits 21 in a one-to-one correspondence manner, and connecting the output ends of the multiple paths of DC/DC power supplies 9 to be tested with the input ends of the multiple paths of inverters 31 in a one-to-one correspondence manner;
b. closing a first switch circuit connected with a first DC/DC power supply, setting a communication address for the first DC/DC power supply through a bus by a test host, and disconnecting the first switch circuit after the communication address is set; the communication address of each inverter 31 can be preset through a dial switch on the inverter 31;
c. calibrating the input voltage, the input current, the output voltage, the output current and the given output voltage of the first path of DC/DC power supply; the calibration modes are the prior art, which are not described herein again, and the calibration of the input voltage, the input current, the output voltage and the output current of the DC/DC power supply is actually performed on the measurement deviation of the voltage sensor and the current sensor of the DC/DC power supply; the calibration of the given output voltage is actually the calibration of the output deviation of the analog-to-digital converter of the given output voltage;
d. according to the operations of the step b and the step c, setting communication addresses for the rest of each path of DC/DC power supply in sequence, and calibrating the input voltage, the input current, the output voltage, the output current and the given output voltage of the rest of each path of DC/DC power supply;
e. setting a given output current value for the multi-channel inverter 31 by the test host 4 through the bus;
f. closing the multi-path first switch circuit to enable the multi-path DC/DC power supply 9 to be tested and the multi-path inverter 31 to be put into operation; after the test device is put into operation, the voltage sensor, the current sensor and the temperature sensor in the DC/DC power supply 9 to be tested can detect the input voltage, the input current, the output voltage, the output current and the working temperature of the DC/DC power supply 9, and send the detection result to the test host 4 for the test host 4 to display. If the DC/DC power supply 9 finds the conditions of overvoltage, undervoltage, overcurrent and overheating, a fault signal is sent to the test host 4;
g. when receiving a fault signal sent by any one of the DC/DC power supplies 9 to be tested, the test host 4 sends an alarm message to the outside.
The embodiment utilizes the characteristics of long bus transmission distance and strong anti-interference capability, can remotely monitor the DC/DC power supply, and improves the safety of the test.
Claims (10)
1. A DC/DC power supply test system comprises a power supply module, a load module and a test host, and is characterized in that the DC/DC power supply test system comprises a plurality of paths of first switch circuits with the same number as that of a plurality of paths of DC/DC power supplies to be tested;
the output end of the power supply module is respectively connected with the input ends of the multiple paths of first switch circuits, the output ends of the multiple paths of first switch circuits are used for being respectively connected with the input ends of multiple paths of DC/DC power supplies to be tested in a one-to-one correspondence manner, and the power supply module is used for supplying voltage to the multiple paths of DC/DC power supplies to be tested;
the load module comprises a plurality of inverters, and the input ends of the plurality of inverters are used for being respectively connected with the output ends of a plurality of DC/DC power supplies to be tested in a one-to-one correspondence manner;
the test host is communicated with a multi-path DC/DC power supply to be tested and the multi-path inverter respectively through a bus; the test host can send instructions to the inverter through the bus, and the magnitude of the load impedance of the DC/DC power supply to be tested is changed by changing the output current of the inverter.
2. The DC/DC power supply testing system according to claim 1, wherein the multi-channel inverters are equally divided into three groups, and output ends of the three groups of inverters are respectively connected with three live wires;
the three live wires are electrically connected with three input ends of the power module in a one-to-one correspondence mode.
3. The DC/DC power supply test system of claim 2, wherein the DC/DC power supply test system comprises a plurality of second switch circuits in one-to-one correspondence with a plurality of inverters;
and each inverter is connected with the live wire through a corresponding second switching circuit.
4. The DC/DC power supply test system according to claim 3, wherein the output terminal of the test host is connected to the control input terminals of the plurality of second switch circuits respectively, so as to control on/off of each second switch circuit.
5. The DC/DC power supply test system according to claim 1, wherein the power supply module comprises a rectifier bridge, an input end of the rectifier bridge is used for connecting an external 380V alternating current power supply, and an output end of the rectifier bridge is used for being respectively connected with input ends of the multiple first switch circuits.
6. The DC/DC power supply testing system according to claim 1 or 5, wherein each of the first switching circuits comprises a contactor.
7. The DC/DC power supply testing system according to claim 1, wherein the output terminal of the testing host is connected to the control input terminals of the plurality of first switch circuits respectively, so as to control on/off of each first switch circuit.
8. The DC/DC power supply test system of claim 1, wherein the bus is a CAN bus.
9. The DC/DC power supply testing system of claim 1, wherein the inverter is a bi-directional inverter.
10. A method for burn-in testing of a DC/DC power supply, wherein the DC/DC power supply is subjected to burn-in testing using the DC/DC power supply testing system of claim 1, comprising the steps of:
a. connecting the input ends of the multi-path DC/DC power supplies to be tested with the output ends of the multi-path first switch circuits in a one-to-one correspondence manner, and connecting the output ends of the multi-path DC/DC power supplies to be tested with the input ends of the multi-path inverters in a one-to-one correspondence manner;
b. closing a first switch circuit connected with a first DC/DC power supply, setting a communication address for the first DC/DC power supply through a bus by a test host, and disconnecting the first switch circuit after the communication address is set;
c. calibrating the input voltage, the input current, the output voltage, the output current and the given output voltage of the first path of DC/DC power supply;
d. according to the operations of the step b and the step c, setting communication addresses for the rest of each path of DC/DC power supply in sequence, and calibrating the input voltage, the input current, the output voltage, the output current and the given output voltage of the rest of each path of DC/DC power supply;
e. setting a given output current value for the multi-channel inverter through a bus by a test host;
f. closing the multi-path first switch circuit to enable the multi-path DC/DC power supply to be tested and the multi-path inverter to be operated;
g. when the test host receives a fault signal sent by any DC/DC power supply to be tested, alarm information is sent outwards.
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| CN114487898A (en) * | 2022-04-15 | 2022-05-13 | 深圳市首航新能源股份有限公司 | Power supply aging test method and device, electronic equipment and system thereof |
| CN115097251B (en) * | 2022-08-25 | 2022-11-25 | 深圳市首航新能源股份有限公司 | Test system and method, control module and readable storage medium |
| CN115700392B (en) * | 2022-10-28 | 2023-06-02 | 深圳市恒运昌真空技术有限公司 | Power supply aging test circuit and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290334A (en) * | 2008-06-11 | 2008-10-22 | 德州三和电器有限公司 | Alternating current input power supplying converter energy-saving aging device |
| CN101290335A (en) * | 2008-06-11 | 2008-10-22 | 德州三和电器有限公司 | Direct-current input power supplying converter energy-saving aging device |
| CN201204550Y (en) * | 2008-06-11 | 2009-03-04 | 德州三和电器有限公司 | Energy-saving aging device for AC input power supply converter |
| CN201707352U (en) * | 2010-05-13 | 2011-01-12 | 北京索英电气技术有限公司 | Multi-input channel electric energy feedback type electronic load based on bus framework |
| CN201955456U (en) * | 2010-11-27 | 2011-08-31 | 西安大昱光电科技有限公司 | Energy-saving aging system for LED (light-emitting diode) street lamp power supplies |
| CN203350424U (en) * | 2013-06-27 | 2013-12-18 | 江苏爱克赛电气制造有限公司 | Uninterruptible power supply aging test system |
| CN106093803A (en) * | 2016-06-07 | 2016-11-09 | 东莞市冠佳电子设备有限公司 | Switch power supply aging test circuit |
| CN106226632A (en) * | 2016-09-06 | 2016-12-14 | 东莞市冠达自动化设备有限公司 | A kind of motor variable-frequency driver aging testing system and method for testing thereof |
| CN206740944U (en) * | 2017-05-31 | 2017-12-12 | 河南开梦电子科技有限公司 | A kind of DC/DC power supplys energy-saving ageing test equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533074B (en) * | 2008-09-22 | 2011-07-20 | 珠海赛比特电气设备有限公司 | Electric energy feedback type electronic load with multi-channel wide voltage input |
| CN201917645U (en) * | 2011-04-13 | 2011-08-03 | 北京铁通康达铁路通信信号设备有限公司 | Power module test device for railroad signal power supply screen |
| KR101434049B1 (en) * | 2012-12-07 | 2014-09-02 | 삼성전기주식회사 | Power supplying apparatus |
| CN205920205U (en) * | 2016-07-07 | 2017-02-01 | 中国电子科技集团公司第五十研究所 | Communication product power consumption source plate tester |
| CN109521369A (en) * | 2018-11-02 | 2019-03-26 | 中车工业研究院有限公司 | A kind of test macro of energy-storage travelling wave tube |
-
2019
- 2019-09-30 CN CN201910945776.3A patent/CN110673054B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290334A (en) * | 2008-06-11 | 2008-10-22 | 德州三和电器有限公司 | Alternating current input power supplying converter energy-saving aging device |
| CN101290335A (en) * | 2008-06-11 | 2008-10-22 | 德州三和电器有限公司 | Direct-current input power supplying converter energy-saving aging device |
| CN201204550Y (en) * | 2008-06-11 | 2009-03-04 | 德州三和电器有限公司 | Energy-saving aging device for AC input power supply converter |
| CN201707352U (en) * | 2010-05-13 | 2011-01-12 | 北京索英电气技术有限公司 | Multi-input channel electric energy feedback type electronic load based on bus framework |
| CN201955456U (en) * | 2010-11-27 | 2011-08-31 | 西安大昱光电科技有限公司 | Energy-saving aging system for LED (light-emitting diode) street lamp power supplies |
| CN203350424U (en) * | 2013-06-27 | 2013-12-18 | 江苏爱克赛电气制造有限公司 | Uninterruptible power supply aging test system |
| CN106093803A (en) * | 2016-06-07 | 2016-11-09 | 东莞市冠佳电子设备有限公司 | Switch power supply aging test circuit |
| CN106226632A (en) * | 2016-09-06 | 2016-12-14 | 东莞市冠达自动化设备有限公司 | A kind of motor variable-frequency driver aging testing system and method for testing thereof |
| CN206740944U (en) * | 2017-05-31 | 2017-12-12 | 河南开梦电子科技有限公司 | A kind of DC/DC power supplys energy-saving ageing test equipment |
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