CN218350477U - Double-inverter EOL testing device - Google Patents
Double-inverter EOL testing device Download PDFInfo
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- CN218350477U CN218350477U CN202221907003.XU CN202221907003U CN218350477U CN 218350477 U CN218350477 U CN 218350477U CN 202221907003 U CN202221907003 U CN 202221907003U CN 218350477 U CN218350477 U CN 218350477U
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Abstract
The utility model discloses a two dc-to-ac converter EOL testing arrangement, to in traditional dc-to-ac converter test, the problem that the utilization ratio of electrical load and DC power supply is low in the test of dc-to-ac converter EOL, through one set of electrical load and DC power supply of two dc-to-ac converter EOL racks sharing, through staggering use electrical load and DC power supply, promote electrical load and DC power supply's utilization ratio to 100%, and then reduce testing arrangement's area, reduction in production cost.
Description
Technical Field
The utility model belongs to the technical field of the dc-to-ac converter test, especially, relate to a two dc-to-ac converter EOL testing arrangement.
Background
Inverters are essential components in many applications because they can convert voltage bi-directionally. One example is to convert the direct current voltage (DC) of the battery into the alternating current voltage (AC) required by the motor. The inverter may also convert the generated alternating current voltage (AC) into direct current voltage (DC) for use in various kinds of electric terminals. This functionality makes inverters an important component in electromigration and many industrial applications.
In the automotive industry, the requirements for quality, durability and safety are extremely demanding. To ensure the safety of these components, all components are subjected to stringent tests from development to production, including of course EOL (End of line) testing of the inverter.
In a conventional inverter EOL test, one EOL test bench needs a set of electrical loads and a dc power supply, and the test content of the inverter EOL is mainly divided into two parts:
1. high-voltage load test, which requires an electrical load and a direct-current power supply to provide energy and load;
2. low voltage testing, interface testing, dormant current testing and the like without electric loads and direct current power supplies.
Generally, the total cost of the electric load and the direct current power supply in the inverter EOL rack accounts for about four, but the utilization rate is only 50%.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two dc-to-ac converter EOL testing arrangement can effectively improve electrical load and DC power supply's utilization ratio, reduces testing arrangement's area, reduction in production cost.
In order to solve the above problem, the technical scheme of the utility model is that:
a dual inverter EOL test apparatus, comprising: the system comprises a direct current power supply, a first inverter test circuit, a second inverter test circuit and an electrical load;
the direct current power supply is electrically connected with the input end of the first inverter test circuit through a first switch, or is electrically connected with the input end of the second inverter test circuit through a second switch;
the input end of the electrical load is electrically connected with the output end of the first inverter test circuit through a third switch, or is electrically connected with the output end of the second inverter test circuit through a fourth switch;
the output end of the electrical load is electrically connected with the direct current power supply to transmit direct current to the direct current power supply, so that energy recovery is realized.
According to the utility model discloses an embodiment, first inverter test circuit includes first inverter under test, first three-phase transformer;
the input end of the first inverter to be tested is electrically connected with the direct current power supply through the first switch and receives direct current provided by the direct current power supply;
the output end of the first inverter to be tested is electrically connected with the first three-phase transformer and transmits three-phase alternating current to the first three-phase transformer;
the output end of the first three-phase transformer is electrically connected with the input end of the electrical load through the third switch, and the current and the voltage are output to the electrical load.
According to an embodiment of the present invention, the second inverter test circuit includes a second inverter to be tested and a second three-phase transformer;
the input end of the second inverter to be tested is electrically connected with the direct current power supply through the second switch and receives direct current provided by the direct current power supply;
the output end of the second inverter to be tested is electrically connected with the second three-phase transformer and transmits three-phase alternating current to the second three-phase transformer;
and the output end of the second three-phase transformer is electrically connected with the input end of the electrical load through the fourth switch, and outputs current and voltage to the electrical load.
According to the utility model discloses an embodiment, electric load is the industry dc-to-ac converter, electric load turns into the direct current with three-phase alternating current, transmits for DC power supply realizes energy recuperation.
According to the utility model discloses an embodiment, the electric load transmit for DC power supply's electric energy does DC power supply transmits 80% ~ 82% of first inverter under test or the second inverter under test.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
the utility model discloses two dc-to-ac converter EOL testing arrangement in an embodiment, to in the test of traditional dc-to-ac converter, the problem that the utilization ratio of electrical load and DC power supply in the test of dc-to-ac converter EOL is low through one set of electrical load and DC power supply of two dc-to-ac converter EOL rack sharing, through staggering use electrical load and DC power supply, promote electrical load and DC power supply's utilization ratio to 100%.
Drawings
Fig. 1 is a schematic diagram of a dual inverter EOL testing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a dc power supply according to an embodiment of the present invention.
Description of reference numerals:
1: a direct current power supply; 101: a first rectifier; 102: a second rectifier; 2: a first inverter under test; 3: a first three-phase transformer; 4: an electrical load; 5: a second inverter under test; 6: a second three-phase transformer; 7: a first switch; 8: a second switch; 9: a third switch; 10: and a fourth switch.
Detailed Description
The following describes a dual inverter EOL testing apparatus according to the present invention in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.
In the embodiment, aiming at the problem that the utilization rate of the electrical load and the direct current power supply in the inverter EOL test is low in the traditional inverter test, the two inverter EOL racks share one set of the electrical load and the direct current power supply, and the utilization rate of the electrical load and the direct current power supply is increased to 100% by staggering the use of the electrical load and the direct current power supply.
This double inverter EOL testing arrangement includes: the system comprises a direct current power supply, a first inverter test circuit, a second inverter test circuit and an electrical load; the direct current power supply is electrically connected with the input end of the first inverter test circuit through the first switch, or is electrically connected with the input end of the second inverter test circuit through the second switch; the input end of the electrical load is electrically connected with the output end of the first inverter test circuit through a third switch, or is electrically connected with the output end of the second inverter test circuit through a fourth switch; the output end of the electrical load is electrically connected with the direct current power supply to transmit direct current to the direct current power supply, so that energy recovery is realized.
When the first inverter test circuit is subjected to a high-voltage load test, the first switch and the third switch are closed, the direct-current power supply and the electrical load are connected with the first inverter test circuit, and the high-voltage load test of the first inverter is executed. And simultaneously, the second switch and the fourth switch are disconnected, so that the direct-current power supply and the electrical load are disconnected with the second inverter test circuit, and the low-voltage test, the interface test and the dormant current test of the second inverter are executed.
When the high-voltage load test is carried out on the second inverter test circuit, the second switch and the fourth switch are closed, so that the direct-current power supply and the electrical load are connected with the second inverter test circuit, and the high-voltage load test of the second inverter is executed. And simultaneously, disconnecting the first switch and the third switch, disconnecting the direct-current power supply and the electrical load from the first inverter test circuit, and executing a low-voltage test, an interface test and a sleep current test of the first inverter.
The two inverter test circuits share one set of electric load and a DC power supply, and the utilization rate of the electric load and the DC power supply is improved to 100% by staggering the use of the electric load and the DC power supply.
Specifically, referring to fig. 1, the first inverter testing circuit includes a first inverter under test 2 and a first three-phase transformer 3. The input end of the first inverter to be tested 2 is electrically connected with the direct current power supply 1 through a first switch 7, and receives direct current provided by the direct current power supply 1. The output end of the first inverter under test 2 is electrically connected to the first three-phase transformer 3, and transmits three-phase ac power to the first three-phase transformer 3. The output end of the first three-phase transformer 3 is electrically connected to the input end of the electrical load 4 through the third switch 9, and outputs current and voltage to the electrical load 4.
The second inverter test circuit includes a second inverter under test 5 and a second three-phase transformer 6. The input end of the second inverter to be tested 5 is electrically connected with the direct current power supply 1 through a second switch 8, and receives the direct current provided by the direct current power supply 1. The output end of the second inverter under test 5 is electrically connected to the second three-phase transformer 6, and transmits the three-phase ac power to the second three-phase transformer 6. The output end of the second three-phase transformer 6 is electrically connected to the input end of the electrical load 4 through a fourth switch 10, and outputs current and voltage to the electrical load 4.
The electrical load 4 may be an industrial inverter, and when the electrical load 4 is an industrial inverter, the electrical load converts three-phase alternating current into direct current, and transmits the direct current to the direct current power supply 1, so as to recover energy. Because the industrial inverter does not consume energy actually, the electric energy transmitted by the electric load 4 to the direct current power supply 1 can reach 80% -82% of the electric energy transmitted by the direct current power supply 1 to the first inverter under test 2 or the second inverter under test 5.
Referring to fig. 2, the dc power supply 1 of the present embodiment includes a first rectifier 101 and a second rectifier 102. A first AC terminal 101_a, a second AC terminal 101_b, a first DC terminal 101_c, and a second DC terminal 101 _ud are provided on the first rectifier 101, and a first AC terminal 102_a, a second AC terminal 102_b, a first DC terminal 102_c, and a second DC terminal 102 _ud are provided on the second rectifier 102.
Wherein a first AC terminal 101_a of the first rectifier 101 is coupled to a first terminal of the alternating current supply network and a second AC terminal 101_b thereof is coupled to a first AC terminal 102_a of the second rectifier 102; the first DC terminal 101_c and the second DC terminal 101 _dthereof are connected to the electrical load 4 to receive the direct current transmitted by the electrical load 4.
The second AC terminal 102\ub of the second rectifier 102 is coupled to a second terminal of the alternating current supply network, the first DC terminal 102_c and the second DC terminal 102_d thereof being electrically connected with the first switch 7 or the third switch 9, thereby supplying power to the first inverter under test 2 or the second inverter under test 5.
The first rectifier 101 and/or the second rectifier 102 are full-wave rectifiers, and may be bridge rectifiers formed by four diodes.
Compared with the traditional inverter EOL testing device, the structure and the function of the double-inverter EOL testing device in the embodiment have the following advantages:
the utility model provides a two dc-to-ac converter EOL testing arrangement, to in traditional dc-to-ac converter test, one set of electric load and DC power supply sharing through two dc-to-ac converter EOL racks low-usage problem in the dc-to-ac converter EOL test, through staggering and use electric load and DC power supply, promote electric load and DC power supply's utilization ratio to 100%; and further, the occupied area of the testing device is reduced, the mechanical structure is simplified, and the production cost is reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (5)
1. A dual inverter EOL test apparatus, comprising: the system comprises a direct current power supply, a first inverter test circuit, a second inverter test circuit and an electrical load;
the direct current power supply is electrically connected with the input end of the first inverter test circuit through a first switch, or is electrically connected with the input end of the second inverter test circuit through a second switch;
the input end of the electrical load is electrically connected with the output end of the first inverter test circuit through a third switch, or is electrically connected with the output end of the second inverter test circuit through a fourth switch;
the output end of the electrical load is electrically connected with the direct current power supply and transmits direct current to the direct current power supply to realize energy recovery;
when the high-voltage load test is carried out on the first inverter test circuit, the first switch and the third switch are closed, so that the direct-current power supply and the electrical load are connected with the first inverter test circuit, and the high-voltage load test of the first inverter is executed; and simultaneously, disconnecting the second switch and the fourth switch, so that the direct-current power supply and the electrical load are disconnected from the second inverter test circuit, and executing a low-voltage test, an interface test or a dormant current test of the second inverter.
2. The dual inverter EOL test apparatus of claim 1, wherein the first inverter test circuit comprises a first inverter under test, a first three-phase transformer;
the input end of the first inverter to be tested is electrically connected with the direct current power supply through the first switch and receives direct current provided by the direct current power supply;
the output end of the first inverter to be tested is electrically connected with the first three-phase transformer and transmits three-phase alternating current to the first three-phase transformer;
the output end of the first three-phase transformer is electrically connected with the input end of the electrical load through the third switch, and outputs current and voltage to the electrical load.
3. The dual inverter EOL test apparatus of claim 1, wherein the second inverter test circuit comprises a second inverter under test, a second three-phase transformer;
the input end of the second inverter to be tested is electrically connected with the direct current power supply through the second switch and receives direct current provided by the direct current power supply;
the output end of the second inverter to be tested is electrically connected with the second three-phase transformer and transmits three-phase alternating current to the second three-phase transformer;
and the output end of the second three-phase transformer is electrically connected with the input end of the electrical load through the fourth switch, and outputs current and voltage to the electrical load.
4. The dual inverter EOL testing apparatus of any one of claims 1-3, wherein the electrical load is an industrial inverter, and wherein the electrical load converts three-phase ac power to dc power for transmission to the dc power source for energy recovery.
5. The dual inverter EOL test apparatus of claim 2 or claim 3, wherein the electrical power delivered by the electrical load to the dc power source is between 80% and 82% of the power delivered by the dc power source to the first or second inverter under test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221907003.XU CN218350477U (en) | 2022-07-21 | 2022-07-21 | Double-inverter EOL testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221907003.XU CN218350477U (en) | 2022-07-21 | 2022-07-21 | Double-inverter EOL testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218350477U true CN218350477U (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221907003.XU Active CN218350477U (en) | 2022-07-21 | 2022-07-21 | Double-inverter EOL testing device |
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| Country | Link |
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| CN (1) | CN218350477U (en) |
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2022
- 2022-07-21 CN CN202221907003.XU patent/CN218350477U/en active Active
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