CN220367348U - Test circuit, device and electric equipment - Google Patents
Test circuit, device and electric equipment Download PDFInfo
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- CN220367348U CN220367348U CN202321090044.9U CN202321090044U CN220367348U CN 220367348 U CN220367348 U CN 220367348U CN 202321090044 U CN202321090044 U CN 202321090044U CN 220367348 U CN220367348 U CN 220367348U
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- 238000012360 testing method Methods 0.000 title claims abstract description 162
- 230000009466 transformation Effects 0.000 claims abstract description 20
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000005501 phase interface Effects 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 3
- 206010014357 Electric shock Diseases 0.000 abstract description 6
- 238000001228 spectrum Methods 0.000 description 32
- 238000010586 diagram Methods 0.000 description 12
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- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
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Abstract
The utility model relates to the field of testing, and discloses a testing circuit, a testing device and electric equipment, wherein the testing circuit comprises the following components: the device comprises a first power supply, a control module, a data acquisition module, a tested module, a transformation module and a contactor module, wherein the contactor module comprises a first contactor group, a second contactor group and a third contactor group; each output interface of the first power supply is connected with each input interface corresponding to the tested equipment through any contactor in the first contactor group; each input interface of the data acquisition module is connected with each input interface corresponding to the tested equipment; the output end of the transformation module is connected with each output interface of the first power supply through any contactor in the second contactor group; the output end of the transformation module is connected with each input interface of the tested equipment through any contactor in the third contactor group; the controller is connected with each contactor. The control module controls the contactor to connect the corresponding interface into the circuit to complete the test, the wiring is not required to be replaced frequently, the test efficiency is improved, and the electric shock risk is reduced.
Description
Technical Field
The utility model relates to the field of electric equipment testing, in particular to a testing circuit, a testing device and electric equipment.
Background
The voltage distortion spectrum test is used for verifying whether the normal working well can keep the specified performance when the voltage distortion frequency and the amplitude specified by the voltage distortion spectrum appear in the power supply voltage of the three-phase alternating current electric equipment. When the voltage distortion frequency and amplitude specified by the voltage distortion frequency spectrum appear in the power supply voltage, the electric equipment can continuously work and keep the performance specified by the special specification of the electric equipment when the aircraft power supply system normally works, the performance is not less than the specified time, the unsafe state is not damaged or caused, and the test of the electric equipment is judged to be qualified.
In the related art, according to the three-phase alternating current test requirement and method in the power supply adaptability test method of the airborne electric equipment, test equipment required by the voltage distortion frequency spectrum comprises a test power supply, a variable frequency power supply, a coupling transformer, a true effective value voltmeter, a frequency meter, a frequency spectrum analyzer, 3 inductors (50 uH), 3 capacitors (10 uF) and the like, and three test configurations exist in a three-phase system.
The inventors of the present application found that the following problems also exist during the test: the wiring mode needs to be replaced frequently, so that the testing efficiency is reduced, the electric shock risk is increased, and more monitoring equipment is needed. To solve the above-mentioned drawbacks, the present application provides a voltage distortion spectrum test circuit.
Disclosure of Invention
The utility model aims to provide a test circuit, a test device and electric equipment, and the test circuit and the test device improve the test efficiency in the voltage distortion frequency spectrum test.
In order to solve the above technical problems, an embodiment of the present utility model provides a test circuit, including: the device comprises a first power supply, a control module, a data acquisition module, a tested module, a transformation module and a contactor module, wherein the contactor module comprises a first contactor group, a second contactor group and a third contactor group; each phase output interface of the first power supply is connected with each phase input interface corresponding to the tested equipment through any contactor in the first contactor group; each phase input interface of the data acquisition module is connected with each phase input interface corresponding to the tested equipment; the output end of the transformation module is connected with each phase output interface of the first power supply through any contactor in the second contactor group; the output end of the transformation module is connected with each phase of input interface of the tested equipment through any contactor in the third contactor group; the controller is connected with each contactor.
The embodiment of the utility model also provides a testing device which comprises the testing circuit.
The embodiment of the utility model also provides electric equipment, which comprises the test circuit.
Compared with the prior art, the test circuit of the embodiment of the utility model comprises: the device comprises a first power supply, a control module, a data acquisition module, a tested module, a transformation module and a contactor module, wherein the contactor module comprises a first contactor group, a second contactor group and a third contactor group; each phase output interface of the first power supply is connected with each phase input interface corresponding to the tested equipment through any contactor in the first contactor group; each phase input interface of the data acquisition module is connected with each phase input interface corresponding to the tested equipment; the output end of the transformation module is connected with each phase output interface of the first power supply through any contactor in the second contactor group; the output end of the transformation module is connected with each phase of input interface of the tested equipment through any contactor in the third contactor group; a controller is connected to each of the contactors. By adding the control module and the contactor module in the test circuit, when the test circuit wants to carry out voltage distortion of different phases on the tested module, the controller module is only required to control the contactor module to connect the corresponding interface and the voltage transformation module into the test circuit, so that the multiphase voltage of the tested module can be tested in the same test circuit, the wiring mode is not required to be replaced frequently, the test efficiency is effectively improved, the electric shock risk is reduced, and the safety of equipment and personnel is ensured.
In addition, in one example, each of the first contactor group, the second contactor group and the third contactor group includes at least one contactor, and the first contactor group is disposed between the second contactor group and the third contactor group; the number of contactors in the first, second and third contactor sets is related to the number of input interfaces of each phase of the device under test. The number of the contactors in each contactor group is determined according to the number of the input interfaces of each phase of the tested equipment, so that all test requirements of the tested equipment can be met.
In addition, in one example, the transformation module comprises a second power supply and a transformer, the first power supply is a test power supply, the second power supply is a variable frequency power supply, and the test power supply, the data acquisition module and the neutral line interface N of the tested device are all connected with the ground. The variable frequency power supply is used as a second power supply, and the voltage frequency is adjusted during testing, so that the test result of the tested equipment under different frequency voltages can be obtained, the circuit structure is further simplified, and the test efficiency is improved.
Additionally, in one example, the test circuit further comprises: a plurality of inductors; the inductors are respectively connected between each phase of output interface of the first power supply and the corresponding contactor of each phase of output interface; wherein the number of inductors is the same as the number of output phases of the first power supply. The circuit further includes a plurality of capacitors; the capacitors are respectively connected between one end of the output interface of the coupling transformer and the ground wire; wherein the number of capacitors is the same as the number of output phases of the first power supply. Through adding inductor and condenser in the circuit, can play the filtering effect, filter the high frequency signal that frequency conversion power supply produced, prevent that high frequency signal from filling test power supply in reverse, damage test power supply.
In addition, in one example, the control module is configured to control the operating states of the contactors related to the current test interface in the first contactor group, the second contactor group and the third contactor group to be closed according to the preset test table and the current test interface of the device under test, and control the operating states of the contactors related to the current test interface in the first contactor group, the second contactor group and the third contactor group to be opened. Through presetting the test table, the corresponding relation between the test phase interface and the working state of the contactor in each contactor group is established, the test table can be directly read when the test is carried out, and the test efficiency is improved.
In addition, in one example, the control module further comprises a host computer, a programmable logic controller connected with the host computer, a relay connected with the programmable logic controller and a direct current switching power supply connected with the programmable logic controller, the relay and the contactor, and in addition, a feedback signal output interface of the contactor is also connected with a feedback signal input interface of the programmable logic controller. The test circuit can be controlled and modified by the upper computer through the addition of the upper computer, the programmable logic controller and the relay, so that the operation is convenient; and the feedback signal output interface of the contactor is also connected with the feedback signal input interface of the programmable logic controller, and the upper computer can read the access signal of the auxiliary contact of the programmable logic controller to judge whether the contactor acts correctly, so that the user can check conveniently.
Drawings
FIG. 1 is a schematic circuit diagram of a phase A voltage distortion spectrum test according to the related art;
FIG. 2 is a schematic circuit diagram of a B-phase voltage distortion spectrum test according to the related art;
FIG. 3 is a schematic circuit diagram of a C-phase voltage distortion spectrum test according to the related art;
FIG. 4 is a schematic diagram of a test circuit according to an embodiment of the utility model;
FIG. 5 is a schematic diagram of a control module in connection with a contactor according to an embodiment of the utility model;
fig. 6 is an electrical connection diagram of a contactor according to an embodiment of the utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present utility model, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.
In the related art, the voltage distortion spectrum test is used for verifying whether the three-phase alternating current 115V/200V and 400Hz electric equipment can normally work well to maintain the specified performance when the voltage distortion frequency and the amplitude specified by the GJB181B-2012 voltage distortion spectrum appear in the power supply voltage. When the voltage distortion frequency and amplitude specified by the GJB181B-2012 voltage distortion frequency spectrum appear in the power supply voltage (see Table 1), the electric equipment can continuously work and maintain the performance specified by the special specification of the electric equipment when the aircraft power supply system normally works, the power supply system is not less than the specified time, and the power supply system is not damaged or in an unsafe state, so that the test of the electric equipment is judged to be qualified.
TABLE 1
According to the requirements and the method for testing the power supply adaptability of the HB20326-2016 airborne electric equipment in the three-phase alternating current 115/200V and 400Hz test, test equipment required by the voltage distortion frequency spectrum comprises a test power supply, a variable frequency power supply, a coupling transformer, a true effective value voltmeter, a frequency meter, a spectrum analyzer, 3 inductors (50 uH), 3 capacitors (10 uF) and the like, and the test configuration is shown in figures 1, 2 and 3. Fig. 1 is a circuit schematic diagram of a phase a voltage distortion spectrum test, fig. 2 is a circuit schematic diagram of a phase B voltage distortion spectrum test, and fig. 3 is a circuit schematic diagram of a phase C voltage distortion spectrum test.
In fig. 1, the circuit for testing the a-phase voltage distortion spectrum comprises a variable frequency power supply, a test power supply, tested equipment, a coupling transformer, a true effective value voltmeter, a frequency meter, a spectrum analyzer and three inductors and capacitors. The ABC three-phase output of the test power supply is connected to the ABC three-phase input of the tested equipment, the variable frequency power supply is connected to the A-phase connection line of the test power supply and the tested equipment through the coupling transformer, one end of the true effective value voltmeter, the frequency meter and the spectrum analyzer are respectively connected with the A-phase input port of the tested equipment, the other end of the true effective value voltmeter, the frequency meter and the spectrum analyzer are connected with the N port of the tested equipment, the N port of the test power supply is grounded together, finally, the ABC three-phase output port of the test power supply is respectively connected with an inductor, and the other end of the inductor is grounded through a capacitor. In the related art, when testing the A-phase voltage distortion spectrum of the tested equipment, the real effective value voltmeter, the frequency meter and the spectrum analyzer are respectively connected to the A-phase connection wire of the experimental power supply and the tested equipment to obtain related data and obtain results. When the B-phase voltage distortion spectrum of the tested equipment needs to be tested, on the basis of a circuit for testing the A-phase voltage distortion spectrum, a variable frequency power supply is connected to a B-phase connecting line of the test power supply and the tested equipment through a coupling transformer, and a true effective value voltmeter, a frequency meter and a spectrum analyzer are respectively connected to a B-phase input port of the tested equipment for testing, wherein a specific circuit diagram is shown in figure 2. Similarly, if the C-phase interface of the tested device needs to be tested, the variable frequency power supply needs to be connected to a C-phase connection line between the test power supply and the tested device through the coupling transformer, and the true effective value voltmeter, the frequency meter and the spectrum analyzer need to be respectively connected to a C-phase input port of the tested device, and a specific circuit schematic diagram is shown in fig. 3.
In the related art, the wiring mode needs to be frequently replaced in the test process, so that the test efficiency is reduced, the electric shock risk is increased, and more monitoring equipment is needed. In order to solve the above problems, the present utility model provides a test circuit.
One embodiment of the present utility model relates to a test circuit. As shown in fig. 4.
A test circuit, comprising: the device comprises a first power supply, a control module, a data acquisition module, a tested module, a transformation module and a contactor module, wherein the contactor module comprises a first contactor group, a second contactor group and a third contactor group; each phase output interface of the first power supply is connected with each phase input interface corresponding to the tested equipment through any contactor in the first contactor group; each phase input interface of the data acquisition module is connected with each phase input interface corresponding to the tested equipment; the output end of the transformation module is connected with each phase output interface of the first power supply through any contactor in the second contactor group; the output end of the transformation module is connected with each phase of input interface of the tested equipment through any contactor in the third contactor group; a controller is connected to each of the contactors. By adding the control module and the contactor module in the test circuit, when the test circuit wants to carry out voltage distortion of different phases on the tested module, the controller module is only required to control the contactor module to connect the corresponding interface and the voltage transformation module into the test circuit, so that the multiphase voltage of the tested module can be tested in the same test circuit, the wiring mode is not required to be replaced frequently, the test efficiency is effectively improved, the electric shock risk is reduced, and the safety of equipment and personnel is ensured.
In one example, the first contactor group, the second contactor group and the third contactor group each comprise at least one contactor, and the first contactor group is arranged between the second contactor group and the third contactor group; the number of contactors in the first, second and third contactor sets is related to the number of input interfaces of each phase of the device under test. The number of the contactors in each contactor group is determined according to the number of the input interfaces of each phase of the tested equipment, so that all test requirements of the tested equipment can be met.
Specifically, the number of contactors in the present embodiment is 9, and the first contactor group includes contactors 3, 6, 9; the second contactor group comprises contactors 1, 4, 7; the third contactor group comprises contactors 2, 5, 8; the device under test includes an ABC three-phase input. The A phase output interface of the test power supply is connected with the A phase input interface of the tested equipment through the contactor 3; the B phase output interface of the test power supply is connected with the B phase input interface of the tested equipment through the contactor 6; the C-phase output interface of the test power supply is connected with the C-phase input interface of the tested equipment through the contactor 9; the output end of the coupling transformer is respectively connected with the first power supply and each phase circuit between the tested equipment through the contactor, and the coupling transformer comprises: the first output end of the coupling transformer is connected with an A-phase output interface of the test power supply through a contactor 1, and the second output end of the coupling transformer is connected with an A-phase input interface of the tested equipment through a contactor 2; the first output end of the coupling transformer is connected with the B-phase output interface of the test power supply through a contactor 4, and the second output end of the coupling transformer is connected with the B-phase input interface of the tested equipment through a contactor 5; the first output end of the coupling transformer is connected with the C-phase output interface of the test power supply through the contactor 7, and the second output end of the coupling transformer is connected with the C-phase input interface of the tested equipment through the contactor 8.
In one example, the transformation module comprises a second power supply and a transformer, the first power supply is a test power supply, the second power supply is a variable frequency power supply, and the test power supply, the data acquisition module and the neutral line interface N of the tested device are all connected with the ground. The variable frequency power supply is used as a second power supply, and the voltage frequency is adjusted during testing, so that the test result of the tested equipment under different frequency voltages can be obtained, the circuit structure is further simplified, and the test efficiency is improved.
Specifically, the distortion frequency of the variable-frequency power supply can be set according to the distortion frequency in table 1 in the related art, and can also be set according to different test requirements. The data acquisition module comprises data acquisition equipment, the data acquisition equipment replaces a true effective value voltmeter, a frequency meter and a spectrum analyzer in the related technology, the data acquisition equipment has stronger functions and higher acquisition precision.
In one example, the test circuit further includes a plurality of inductors; the inductors are respectively connected between each phase of output interface of the first power supply and the corresponding contactor of each phase of output interface; wherein the number of inductors is the same as the number of output phases of the first power supply. The circuit further includes a plurality of capacitors; the capacitors are respectively connected between one end of the output interface of the coupling transformer and the ground wire; wherein the number of capacitors is the same as the number of output phases of the first power supply. Through adding inductor and condenser in the circuit, can play the filtering effect, filter the high frequency signal that frequency conversion power supply produced, prevent that high frequency signal from filling test power supply in reverse, damage test power supply.
Specifically, in the present embodiment, since the tested device has ABC three-phase input, the number of inductors and capacitors is set to 3, and the inductance value of the inductors and the capacitance value of the capacitors may be set to different values according to practical applications, so long as the filtering effect can be performed in the corresponding circuits to prevent the high-frequency signal from flowing back to the test power supply, in the present embodiment, the inductance value of the inductors is 50uH, and the capacitance value of the capacitors is 10uF.
In one example, the control module is configured to control an operating state of each of the first contactor group, the second contactor group, and the third contactor group according to a current test phase interface of the device under test. Specifically, the control module is used for controlling the working states of the contactors related to the current test interface in the first contactor group, the second contactor group and the third contactor group to be closed according to a preset test table and the current test interface of the tested equipment, and controlling the working states of the contactors unrelated to the current test interface in the first contactor group, the second contactor group and the third contactor group to be opened. Through presetting the test table, the corresponding relation between the test phase interface and the working state of the contactor in each contactor group is established, the test table can be directly read when the test is carried out, and the test efficiency is improved.
Specifically, in this embodiment, the preset test table is shown in table 2 below, and it can be seen in table 2 that when the tested device is tested for a phase a voltage distortion spectrum test, two contactors of K6 and K9 are closed, so that a phase B and a phase C of the tested device are normally input, and then a variable frequency power supply is connected to a connection line of the tested device and an a phase of the test power supply through two contactors of K1 and K2, so as to provide variable frequency voltage for the phase a input of the tested device, thereby implementing the phase a voltage distortion spectrum test for the tested device. The state setting principle of the contactor is the same as that of the phase A when the phase B and the phase C of the tested equipment are subjected to voltage distortion spectrum test. In practical application, the related technicians can set the test table and the corresponding relation in the test table according to the practical application scene.
TABLE 2
In one example, the control module further comprises a host computer, a programmable logic controller connected with the host computer, a relay connected with the programmable logic controller, and a direct current switching power supply connected with the programmable logic controller, the relay and the contactor, and in addition, a feedback signal output interface of the contactor is also connected with a feedback signal input interface of the programmable logic controller. The test circuit can be controlled and modified by the upper computer through the addition of the upper computer, the programmable logic controller and the relay, so that the operation is convenient; and the feedback signal output interface of the contactor is also connected with the feedback signal input interface of the programmable logic controller, and the upper computer can read the access signal of the auxiliary contact of the programmable logic controller to judge whether the contactor acts correctly, so that the user can check conveniently.
Specifically, as shown in fig. 5, in this embodiment, the upper computer communicates with the programmable logic controller PLC through a TCP/IP protocol, the switching power supply is a dc power supply and provides a 24V voltage signal, the upper computer programs a program to control the PLC, the intermediate relay controls the contactor to be turned on and off, and then the auxiliary contact of the contactor is connected with signal information and fed back to the PLC, the upper computer reads the access signal of the auxiliary contact of the PLC to determine whether the contactor acts correctly, and if so, the test program automatically executes the test; if the contact is wrong, the program stops testing and prompts the user which contactor is wrong, so that the user can check conveniently.
In one example, the electrical connection diagram of the contactor is shown in fig. 6. In fig. 6, there are 9 intermediate relays KA1-KA9, and the 9 intermediate relays receive signals from the output end of the PLC and respectively send the signals to corresponding contactors to realize control, and auxiliary contacts of the 9 contactors are also respectively connected to the input end of the PLC to perform signal feedback.
In the embodiment, the wiring mode does not need to be manually changed in the test process, the wiring mode is automatically switched through the upper computer, the electric shock risk is reduced, the test time is saved, and the test efficiency is improved; and the upper computer completes the test by one key, monitors the switch position in real time, ensures the safety of the circuit, and timely stops the test if faults occur, thereby ensuring the safety of equipment and personnel.
Another embodiment of the utility model relates to a testing device. In this embodiment, any of the test circuit embodiments described above is included.
Another embodiment of the utility model is directed to a powered device. In this embodiment, any of the test circuit embodiments described above is included.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.
Claims (10)
1. A test circuit, comprising: the device comprises a first power supply, a control module, a data acquisition module, tested equipment, a transformation module and a contactor module, wherein the contactor module comprises a first contactor group, a second contactor group and a third contactor group;
each phase output interface of the first power supply is connected with each phase input interface corresponding to the tested equipment through any contactor in the first contactor group;
each phase input interface of the data acquisition module is connected with each phase input interface corresponding to the tested equipment;
the output end of the transformation module is connected with each phase output interface of the first power supply through any contactor in the second contactor group;
the output end of the transformation module is connected with each phase of input interface of the tested equipment through any contactor in the third contactor group;
the control module is connected with each contactor.
2. The test circuit of claim 1, wherein each of the first, second, and third sets of contactors includes at least one of the contactors, the first set of contactors being disposed between the second and third sets of contactors; the number of contactors in the first, second and third contactor groups is related to the number of phase input interfaces of the device under test.
3. The test circuit of claim 1, wherein the transformation module comprises a second power source and a transformer, the first power source is a test power source, the second power source is a variable frequency power source, and the test power source, the data acquisition module, and the neutral interface N of the device under test are all connected to ground.
4. The test circuit of claim 1, further comprising: a plurality of inductors;
the inductors are respectively connected between each phase of output interface of the first power supply and the corresponding contactor of each phase of output interface;
wherein the number of inductors is the same as the number of output phases of the first power supply.
5. The test circuit of claim 1, further comprising: a plurality of capacitors;
the capacitors are respectively connected between one end of an output interface of the coupling transformer and the ground wire;
wherein the number of capacitors is the same as the number of output phases of the first power supply.
6. The test circuit of claim 1, wherein the control module is configured to control an operating state of each of the contactors in the first, second, and third contactor groups according to a current test phase interface of the device under test.
7. The test circuit of claim 6, wherein the control module is configured to control the operating states of the contactors of the first, second and third contactor groups related to the current test phase interface to be closed and the operating states of the contactors of the first, second and third contactor groups unrelated to the current test phase interface to be opened according to a preset test table and the current test phase interface of the device under test.
8. The test circuit of claim 1, wherein the control module further comprises a host computer, a programmable logic controller connected with the host computer, a relay connected with the programmable logic controller, and a direct current switching power supply connected with the programmable logic controller PLC, the relay and the contactor, and the feedback signal output interface of the contactor is further connected with the feedback signal input interface of the programmable logic controller.
9. A test device comprising the test circuit of any one of claims 1-8.
10. A powered device comprising the test circuit of any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321090044.9U CN220367348U (en) | 2023-05-08 | 2023-05-08 | Test circuit, device and electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321090044.9U CN220367348U (en) | 2023-05-08 | 2023-05-08 | Test circuit, device and electric equipment |
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| CN220367348U true CN220367348U (en) | 2024-01-19 |
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