CN202929142U - Performance testing apparatus of inverter circuit - Google Patents
Performance testing apparatus of inverter circuit Download PDFInfo
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- CN202929142U CN202929142U CN 201220662202 CN201220662202U CN202929142U CN 202929142 U CN202929142 U CN 202929142U CN 201220662202 CN201220662202 CN 201220662202 CN 201220662202 U CN201220662202 U CN 201220662202U CN 202929142 U CN202929142 U CN 202929142U
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- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 238000004804 winding Methods 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000003278 mimic effect Effects 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 6
- 238000004088 simulation Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 15
- 238000011056 performance test Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
Disclosed in the utility model is a performance testing apparatus of an inverter circuit. The apparatus comprises a set of compressor simulation circuits and a power monitor, wherein the compressor simulation circuit is formed by compressor three-phase winding simulation by resistors and inductors. The compressor simulation circuits serving as a load are connected to an alternating current output side of the inverter circuit to receive a three-phase alternating-current power supply outputted by the inverter circuit; and the power monitor that is connected to the alternating current output side of the inverter circuit collects current and voltage parameters outputted by the inverter circuit to generate performance parameters of the inverter circuit. According to the utility model, a set of compressor simulation circuits that is designed according to the characteristics of the air-conditioning compressor is used to replace an actual compressor and serve as the load of the inverter circuit and is applied to the performance testing process of the inverter circuit. Therefore, the trouble of compressor installation and replacement according to the traditional testing method can be saved; and different loads can be obtained conveniently by changing device parameters in the compressor simulation circuits, thereby meeting the performance testing requirement of the inverter circuit.
Description
Technical field
The utility model belongs to the electronic circuit technical field of measurement and test, specifically, relates to the performance parameter testing device that a kind of inverter circuit for being used for the operation of driving outdoor compressor in the air conditioner product proposes.
Background technology
Along with warming gradually of terrestrial climate and improving constantly of people's living standard, it is day by day extensive that air-conditioning products has progressively been come into huge numbers of families and usable range.Existing air-conditioning products generally all comprises indoor set and off-premises station two parts, wherein, be arranged on the power core that compressor in off-premises station can be described as whole air-conditioner refrigerating system, play compression in the refrigerating circuit of air conditioner, drive the effect of cold-producing medium, and reach the effect of refrigeration by hot merit conversion.
In the circuit design of air-conditioner outdoor unit, normally by inverter circuit, direct supply inversion conversion is generated for the required three-phase alternating-current supply of compressor operating.Can operate under various working condition in actual application due to compressor, thereby the three-phase electricity that causes flowing through compressor fails to be convened for lack of a quorum and changes a lot, and different electric currents can produce direct impact for the parameter of inverter circuit, especially heating problem.
Given this, the research staff is in the development and Design stage of air conditioner, need to detect the parameters such as the ability of inverter circuit under the different loads condition, efficient, thermal value, whether can satisfy the global design requirement of circuit system to judge the current designed inverter circuit that goes out.Generally, in order to obtain different loads, need to change different compressors, and need the experiment condition of adjustment air conditioner complete machine to change the three-phase current that flows through compressor, to detecting the boundary condition of inverter circuit.But, changing compressor and regulation experiment operating mode is all extremely difficult work, and nonetheless, also not necessarily can really reach the boundary condition of inverter circuit, cause thus the inverter circuit parameter obtained inaccurate, the reliability service of air conditioner complete machine is produced to a certain degree impact.
Summary of the invention
The purpose of this utility model is to provide a kind of performance testing device of inverter circuit, replace real compressor as the load of inverter circuit by designing a cover compressor mimic channel, can obtain easily different loads by the device parameters that changes the compressor mimic channel thus, to simplify the performance test work of inverter circuit.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of performance testing device of inverter circuit, comprise compressor mimic channel and electric supervising device that a cover is formed by three phase windings of resistance and inductance analog compression machine, described compressor mimic channel is connected to the interchange outgoing side of inverter circuit as load, receive the three-phase alternating-current supply of inverter circuit output; Described electric supervising device connects the interchange outgoing side of inverter circuit, gathers current parameters and the voltage parameter of inverter circuit output, is used for the generation of inverter circuit performance parameter.
Further, include three series arms that are composed in series by resistance and inductance respectively in described compressor mimic channel, article three, series arm Y-connection, three phase windings of analog compression machine are respectively with the corresponding connection of three-phase terminal of the interchange outgoing side of inverter circuit.
For the different load of convenient acquisition, in described compressor mimic channel, resistance preferably adopts rheostat, and inductance preferably adopts reactor, and the number and the parameter value thereof that are connected on the inductance in every series arm are selected to determine according to the different loads characteristic that will simulate.
In order to detect the thermal value parameter of inverter circuit, be embedded with temperature-sensing element in described inverter circuit, detect the thermal value of inverter circuit under different loads, and generate detection signal and transfer to a controller, drives the temperature rise parameter of display unit demonstration inverter circuit by controller.Can also further detect the border temperature rise of inverter circuit by this design.
Preferably, described temperature-sensing element preferably adopts thermopair to carry out temperature detection to inverter circuit.
Further again, also be provided with a rectifying conversion module in described proving installation, described rectifying conversion module receives alternating current input power supplying, and rectifying conversion becomes DC bus-bar voltage to export the direct current input side of inverter circuit to, generates and is used for driving the required three-phase alternating-current supply of follow-up load to offer the inverter circuit inversion.
Preferably, include rectification circuit and circuit of power factor correction in described rectifying conversion module, described rectification circuit exports circuit of power factor correction to generate stable DC bus-bar voltage after receiving alternating current input power supplying and being rectified into direct supply.
Consider that air-conditioning products in actual use, it allows the Alternating Current Power Supply of access is in certain voltage range, for example in the scope of 170V ~ 250V, in order to simulate this working condition, also be provided with a pressure regulator in described proving installation, the input end of described pressure regulator connects electric main, and the alternating current input power supplying that output voltage amplitude is adjustable transfers to described rectifying conversion module.
Further, described electric supervising device connects the output terminal of pressure regulator, gathers input voltage and the input current of alternating current input power supplying, to be used for the calculating to the inverter circuit performance parameter.
Preferably, described electric supervising device preferably adopts power meter to carry out the parameter detecting of the three-phase alternating-current supply that alternating current input power supplying and inverter circuit export, and automatically generate input general power and output general power, just can calculate thus the efficiency parameters of inverter circuit.
Compared with prior art, advantage of the present utility model and good effect are: the utility model according to the characteristics design of compressor of air conditioner one cover compressor mimic channel, replace real compressor as the load of inverter circuit, be applied in the performance test process of inverter circuit, thus one, not only solve conventional test methodologies and need to install and change the trouble of compressor, and can obtain easily different loads by the device parameters that changes in the compressor mimic channel, to satisfy the performance test requirement of inverter circuit under different loads.In addition, adopt this measuring technology to simulate the load characteristic of compressor under various operating modes by the device parameters that changes mimic channel, thus just easily the control inverter circuit reach boundary condition, obtain boundary parameter, for research staff's test job is provided convenience.
After reading by reference to the accompanying drawings the detailed description of the utility model embodiment, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the design concept figure of a kind of embodiment of compressor mimic channel in the performance testing device of the inverter circuit that proposes of the utility model;
Fig. 2 is the design concept figure of another embodiment of compressor mimic channel;
Fig. 3 is the overall architecture schematic diagram of a kind of embodiment of the performance testing device of the inverter circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
the present embodiment is in order to solve air-conditioning products at the research and development test phase, the experiment condition that need to repeatedly change compressor and adjust the air conditioner complete machine satisfies the performance test requirement of inverter circuit, consequent difficulty of test is large, the not readily accessible problem of boundary condition, creatively having proposed a kind of cover compressor mimic channel that utilizes replaces actual compressor product to be used for the performance test process of inverter circuit, by changing the component parameter in the compressor mimic channel, can obtain easily different loads, not only can satisfy well thus every test request of inverter circuit, and avoided changing the operation of compressor, reduced research staff's difficulty of test.
Based on above mentality of designing, at first the present embodiment considers the load characteristic of compressor of air conditioner.Because the main electric part of compressor is the coil of Y-connection, i.e. three phase winding Y-connections, and every phase winding all has sensibility reciprocal and two parameters of resistance.The size of sensibility reciprocal and resistance can directly have influence on compressor and be the UVW three-phase current of the inverter circuit of compressor power supply, thus the impact different on the parameter generating of inverter circuit.
Based on the above-mentioned electrical specification of compressor, the present embodiment adopts three phase windings of resistance and inductance analog compression machine, and design one cover compressor mimic channel is shown in Figure 1.Specifically, can utilize three series arms that are composed in series by resistance and inductance respectively to come three phase windings of analog compression machine, for example: with the U phase winding of simulation compressor after resistance R u and inductance L u series connection; V phase winding with simulation compressor after resistance R v and inductance L v series connection; W phase winding with simulation compressor after resistance R w and inductance L w series connection.A wherein end of three series arms is linked together, and an other end connects one to one with the sub-U of the three-phase terminal that exchanges outgoing side, V, the W of inverter circuit respectively, forms the compressor load of star connection with simulation.
Compressor mimic channel shown in Figure 1 is replaced actual compressor, be applied in the performance test process of inverter circuit, can save the operation that compressor is installed, alleviate tester's labour intensity.But, consider when compressor moves under different operating modes, its load characteristic that reflects is diverse, therefore, in inverter circuit is carried out the process of performance test, need to be for inverter circuit provides different loads, to test out the parameters of inverter circuit under different loads.Obviously, adopt compressor mimic channel building mode shown in Figure 1 not satisfy and provide the unequally loaded test request for inverter circuit.
In order to address this problem, the present embodiment has proposed by the resistance device in each series arm in change compressor mimic channel and the parameter value of inductance component, obtain the unequally loaded mentality of designing, not only can satisfy thus inverter circuit in the performance test process to the unequally loaded user demand, and can be so that test job becomes more simple, convenient.
In order to satisfy above-mentioned designing requirement, need to make the parameter of resistance device in the compressor mimic channel and inductance component adjustable, namely be designed to compressor simulation circuit structure as shown in Figure 2.Thus one, only need to regulate the parameter value of each resistance device and inductance component, can obtain different loads.
In the side circuit design process, for the adjustable resistance device of parameter, can select rheostat to carry out the specific design of circuit, such as slide rheostat or pot etc.; And for inductance component, also there is no the adjustable single product of parameter at present.Therefore, in order to reach the purpose of design of the inductance value of regulating the compressor mimic channel, the present embodiment adopts the mode of changing the inductance component of different parameters value or adjust the series connection number of inductance component in each series arm in series arm, change the inductance characteristic of compressor mimic channel, and then coordinate rheostatic change in resistance, form different loads, move to simulate compressor the various load characteristics that presented under different operating modes, complete the performance test task to inverter circuit.
Fig. 3 is based on the Testing Platform that compressor mimic channel that the present embodiment proposes builds the inverter circuit that forms (or claim to survey establish device).Wherein, R1, R2, R3 are respectively and are connected on three rheostats in series arm, preferably adopt Standard resistance range at the slide rheostat of 0 ~ 9 Ω and support 30A electric current; Inductance L 1 ~ L6 preferably adopts the reactor of 10mH/20A, connects respectively two in every series arm, and can change as required the number of series connection.Described compressor mimic channel is connected to the interchange outgoing side of inverter circuit, specifically can be by series connection plug Z1 ~ Z3 in the transmission line of three-phase alternating-current supply, and then adopt the mode of pegging graft the compressor mimic channel to be linked into the outgoing side of inverter circuit, as the test load of inverter circuit.
For the required DC bus-bar voltage Vdc of inverter circuit work, can utilize rectifying conversion module that the electric main conversion of outside access is generated.In order to simulate more truly the practical operation situation of inverter circuit on the air-conditioner outdoor unit circuit board, described rectifying conversion module preferably carries out synchronize design according to the circuit design mode of the rectifying conversion module that uses in air-conditioner outdoor unit, specifically comprise rectification circuit and circuit of power factor correction (pfc circuit) two parts, as shown in Figure 3.Wherein, utilize rectification circuit to receive alternating current input power supplying, electric main for example, and after being rectified into direct supply, export that circuit of power factor correction carries out that PFC processes to and boosting inverter after, generation galvanic current source transfers to the direct current input side of inverter circuit, for inverter circuit provides DC bus-bar voltage Vdc.
Due to air conditioner in actual use, it allows the AC power of access can not be a definite value, but there is certain voltage range, for example: for some present air conditioner product, allow the AC power of access 170V ~ 250V, in order to simulate this operating mode, the present embodiment preferably connects pressure regulator at the interchange input side of rectifying conversion module, and by the external electric main of pressure regulator.In inverter circuit is carried out the process of performance test, can be by regulating the transformation ratio of described pressure regulator, and then the amplitude transformation of electric main is allowed the voltage range that accesses to electrical equipment, for example in the scope of 170V ~ 250V, to satisfy the test request of inverter circuit.
In order to obtain the parameters index of inverter circuit under different loads, also be provided with electric supervising device on the test platform of the present embodiment, connect respectively the output terminal of pressure regulator and the interchange outgoing side of inverter circuit, with the accurate detection of realization to voltage parameter, current parameters and the power parameter of the three-phase alternating-current supply of alternating current input power supplying and inverter circuit output.
The below take power meter as described electric supervising device as example, the performance test process of inverter circuit is specifically described.
Use three road voltage detection terminals (can be the electricity folder) of power meter to be connected between UV phase, UW phase and the VW phase of the interchange outgoing side of inverter circuit, detect the line voltage U 1, U3, the U2 that export by inverter circuit; Three tunnel current detecting terminals (for example current transformer) of power meter are connected on respectively in the three-phase power line UVW of interchange outgoing side of inverter circuit, generate phase current I1, I2, the I3 of inverter circuit with induction.
Voltage and current for alternating current input power supplying detects, and can utilize other one road voltage detection terminal of power meter to be connected between the output terminal of pressure regulator, detects the input voltage U4 of alternating current input power supplying; Then utilize other one tunnel current detecting terminal of power meter, preferred current transformer is connected in a wherein transmission lines of alternating current input power supplying, to induce the input current I4 of alternating current input power supplying.
Described power meter is according to the output general power Wo that line voltage U 1, U2, U3 and phase current I1, I2, I3 detected and can calculate inverter circuit; The input voltage U4 that utilization detects and input current I4 can calculate the input general power Wi of inverter circuit.Efficiency eta=Wo/Wi that the tester utilizes output general power Wo that power meter provides and input general power Wi can calculate inverter circuit.
For the thermal value of inverter circuit under different loads, can adopt pre-buried temperature-sensing element in inverter circuit, detect the temperature rise of inverter circuit by temperature-sensing element, and then generation represents that the detection signal of Current Temperatures transfers to outside controller, and convert corresponding with it temperature value to by controller, drive display unit and be shown to the tester, to obtain the temperature rise parameter of inverter circuit.
In the present embodiment, described temperature-sensing element preferably adopts thermopair to carry out the design of circuit system, to simplify circuit structure, reduces hardware cost.
The parameter value of resistance and inductance in change compressor mimic channel is for inverter circuit provides different loads.Then, again detect parameters, and then obtain the parameter indexs such as the phase current of inverter circuit under different loads, line voltage, output general power, efficient, thermal value, to satisfy the performance test requirement of inverter circuit.
Owing to can simulate the electrical specification of actual compressor under any operating mode by the designed compressor mimic channel of the present embodiment, therefore can detect easily the boundary condition of inverter circuit, for example: border temperature rise, maximum output voltage, maximum output current, peak power output etc., the acquisition of these boundary conditions has very important significance concerning the air conditioner research staff, and the effect of directiveness can be provided for the research and development of air conditioner machine product.
In the present embodiment, described inverter circuit preferably adopts intelligent power module (Intelligent Power Module) to design, when simplifying circuit design, reducing volume, it is stable, reliable that assurance offers the three-phase alternating-current supply of compressor load.
Certainly; the above is only a kind of preferred implementation of the present utility model, for those skilled in the art, and under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. the performance testing device of an inverter circuit, it is characterized in that: comprise compressor mimic channel and electric supervising device that a cover is formed by three phase windings of resistance and inductance analog compression machine, described compressor mimic channel is connected to the interchange outgoing side of inverter circuit as load, receive the three-phase alternating-current supply of inverter circuit output; Described electric supervising device connects the interchange outgoing side of inverter circuit, gathers current parameters and the voltage parameter of inverter circuit output, is used for generating the performance parameter of inverter circuit.
2. the performance testing device of inverter circuit according to claim 1, it is characterized in that: include three series arms that are composed in series by resistance and inductance respectively in described compressor mimic channel, article three, series arm Y-connection, three phase windings of analog compression machine are respectively with the corresponding connection of three-phase terminal of the interchange outgoing side of inverter circuit.
3. the performance testing device of inverter circuit according to claim 2, it is characterized in that: in described compressor mimic channel, resistance is rheostat, and the number and the parameter value thereof that are connected on the inductance in every series arm are selected to determine according to the different loads characteristic that will simulate.
4. the performance testing device of the described inverter circuit of any one according to claim 1 to 3, it is characterized in that: be embedded with temperature-sensing element in described inverter circuit, detect the thermal value of inverter circuit under different loads, and generate detection signal and transfer to a controller, drives the temperature rise parameter of display unit demonstration inverter circuit by controller.
5. the performance testing device of inverter circuit according to claim 4, it is characterized in that: described temperature-sensing element is thermopair.
6. the performance testing device of the described inverter circuit of any one according to claim 1 to 3, it is characterized in that: also be provided with a rectifying conversion module in described proving installation, described rectifying conversion module receives alternating current input power supplying, and rectifying conversion becomes DC bus-bar voltage to export the direct current input side of inverter circuit to.
7. the performance testing device of inverter circuit according to claim 6, it is characterized in that: include rectification circuit and circuit of power factor correction in described rectifying conversion module, described rectification circuit exports circuit of power factor correction to generate stable DC bus-bar voltage after receiving alternating current input power supplying and being rectified into direct supply.
8. the performance testing device of inverter circuit according to claim 6, it is characterized in that: also be provided with a pressure regulator in described proving installation, the input end of described pressure regulator connects electric main, and the alternating current input power supplying that output voltage amplitude is adjustable transfers to described rectifying conversion module.
9. the performance testing device of inverter circuit according to claim 8, it is characterized in that: described electric supervising device connects the output terminal of pressure regulator, gather input voltage and the input current of alternating current input power supplying, to be used for the calculating to the inverter circuit performance parameter.
10. the performance testing device of inverter circuit according to claim 9, it is characterized in that: described electric supervising device is power meter.
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| CN 201220662202 CN202929142U (en) | 2012-12-05 | 2012-12-05 | Performance testing apparatus of inverter circuit |
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| CN 201220662202 CN202929142U (en) | 2012-12-05 | 2012-12-05 | Performance testing apparatus of inverter circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998568A (en) * | 2012-12-05 | 2013-03-27 | 海信（山东）空调有限公司 | Performance testing method and testing device of inverter circuit |
| CN104407249A (en) * | 2014-11-27 | 2015-03-11 | 四川长虹空调有限公司 | Test system of refrigeration equipment |
| CN105259451A (en) * | 2015-11-06 | 2016-01-20 | 许继电气股份有限公司 | Test system of current protection value and current protection time for current transformer |
| CN107589355A (en) * | 2017-10-18 | 2018-01-16 | 昆山迈征自动化科技有限公司 | A kind of inverter performance testing device |
-
2012
- 2012-12-05 CN CN 201220662202 patent/CN202929142U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998568A (en) * | 2012-12-05 | 2013-03-27 | 海信（山东）空调有限公司 | Performance testing method and testing device of inverter circuit |
| CN102998568B (en) * | 2012-12-05 | 2015-04-29 | 海信（山东）空调有限公司 | Performance testing method and testing device of inverter circuit |
| CN104407249A (en) * | 2014-11-27 | 2015-03-11 | 四川长虹空调有限公司 | Test system of refrigeration equipment |
| CN105259451A (en) * | 2015-11-06 | 2016-01-20 | 许继电气股份有限公司 | Test system of current protection value and current protection time for current transformer |
| CN107589355A (en) * | 2017-10-18 | 2018-01-16 | 昆山迈征自动化科技有限公司 | A kind of inverter performance testing device |
| CN107589355B (en) * | 2017-10-18 | 2023-12-05 | 昆山迈征自动化科技有限公司 | Inverter performance testing device |
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Granted publication date: 20130508 Termination date: 20181205 |