CN208297573U - A kind of harmonic wave isolated form can present electronic load - Google Patents
A kind of harmonic wave isolated form can present electronic load Download PDFInfo
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- CN208297573U CN208297573U CN201820854123.5U CN201820854123U CN208297573U CN 208297573 U CN208297573 U CN 208297573U CN 201820854123 U CN201820854123 U CN 201820854123U CN 208297573 U CN208297573 U CN 208297573U
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- circuit
- detection module
- output end
- current detection
- power supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses a kind of harmonic wave isolated forms can present electronic load, including inductance filter, the first current detection module, tested power supply, second current detection module, analogue load circuit, booster circuit, inverter circuit, LC filter, third current detection module, dsp controller, voltage detection module and three drive circuit modules.Analogue load circuit is connected to the output end of tested power supply, and booster circuit is connected between analogue load circuit and inverter circuit, and the output end of inverter circuit is connected with the input terminal of tested power supply.First current detection module is connected to tested power input, and the second current detection module is connected to tested power output end, and third current detection module is connected to inverter circuit output end.By three driving circuits respectively with analogue load circuit, booster circuit is connected dsp controller with inverter circuit.The utility model has that low energy consumption, and easy to use, applicability is wide, the advantages of not generating harmonic pollution.
Description
Technical field
The utility model relates to the technical field of electronic load, electronic load can be presented by referring in particular to a kind of harmonic wave isolated form.
Background technique
Electronic load circuit is mainly divided to two kinds, and one is energy consumption type electronic loads, and one is can present type electronic load.It can feedback
Type electronic load has advantage small in size, energy saving, has good development prospect.The type electronic load that can present common at present leads to
The effect of energy feedback is realized into energy inversion to power grid frequently with two-stage circuit structure.But the shortcomings that inversion grid connection is desirable
Application approval and there is quite stringent qualification requirement, neatly can not test and use.
The patent of application number 201810014121.X: a kind of harmonic compensation formula can present electronic simulation load, provide it is a kind of will
Energy inversion used in power supply is tested to power input, the method for realization fictitious load and energy feedback.The patent is mentioned
Method out, using two-stage circuit structure, including booster circuit and inverter circuit.Booster circuit is using boost topology, boosting system
Number is influenced by circuit structure, therefore the program is not suitable for the test of low-tension supply；Inverter circuit is straight by LC filter simultaneously
It connects and is connected with power grid, the higher hamonic wave that inverter generates can flow into power grid.In addition, this method is used for non-isolation type power supply test
When, three switching tubes for being tested the lower half bridge arm of rectifier bridge in power supply are unable to normally, and tested power work situation is caused to change
Become.This method can solve energy consumption problem and inverter circuit flexibly test use the problem of, but itself there are the problem of still
Have to be solved.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, and test power supply can be used by proposing one kind
Energy circulation use, be not necessarily to inversion grid connection, the harmonic wave isolated form that flexibly can be tested and use can present electronic load, Ke Yiying
For the test of multiple power sources, inhibit the harmonic wave interference that generates to power grid of inverter while feedback electric energy in the form of harmonic wave.
To achieve the above object, technical solution provided by the utility model are as follows: a kind of harmonic wave isolated form can present Electronic Negative
It carries, including inductance filter, the first current detection module, tested power supply, the second current detection module, analogue load circuit, liter
Volt circuit, inverter circuit, LC filter, third current detection module, dsp controller, voltage detection module, the first driving electricity
Road, the second driving circuit, third driving circuit；First current detection module is serially connected in the input terminal of tested power supply, described
The output end of first current detection module is connected with dsp controller, the input terminal of the analogue load circuit and tested power supply
Output end is connected, and second current detection module is serially connected between analogue load circuit and tested power supply, second electric current
The output end of detection module is connected with dsp controller, and the output end of first driving circuit is connected with analogue load circuit,
Input terminal connects dsp controller, and the input terminal of the booster circuit is connected with the output end of analogue load circuit, and described second drives
The output end of dynamic circuit is connected with booster circuit, and input terminal connects dsp controller, the output end of the booster circuit and inversion
The input terminal of circuit is connected, and the voltage detection module connects between the positive and negative anodes of booster circuit output end, the voltage detecting
The output end of module is connected with dsp controller, and the output end of the third driving circuit is connected with inverter circuit, and input terminal connects
Dsp controller is connect, the output end of the inverter circuit is connected with LC filter, the input terminal of the LC filter and tested power supply
It is connected, the third current detection module connects between LC filter and tested power input, the third current detecting mould
The output end of block is connected with dsp controller；First current detection module, tested power supply, the second current detection module, simulation
Load circuit, booster circuit, inverter circuit, LC filter and third current detection module constitute closed loop, the inductance filter
Except closed loop, the input terminal of the inductance filter is connected with power grid, and output end is connected with the input terminal of tested power supply.
The analogue load circuit uses boost circuit structure.
The booster circuit uses full-bridge converter structure.
The utility model compared with prior art, have the following advantages that with the utility model has the advantages that
1, the energy feedback that can be exported tested power supply is realized recycling for energy, is greatly saved to input terminal
Test energy used in power supply.
2, power supply output energy is not necessarily to inversion grid connection, easy to use, and test is flexible.
3, can in the form of harmonic wave feedback energy, while inductance filter inhibits harmonic wave to realize the interference of power grid
The harmonic compensation and harmonic wave of power input are isolated.
4, analogue load circuit can be used for the test of various DC power supplies, including low-tension supply in conjunction with booster circuit
And non-isolation type power supply.And the test of various load characteristics can be carried out, it is applied widely.
Detailed description of the invention
Fig. 1 is the electronic load structure principle chart of the utility model.
Fig. 2 is the inverter circuit current control schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail combined with specific embodiments below.
As shown in Figure 1, harmonic wave isolated form provided by the present embodiment can present electronic load, including inductance filter 1, electric current
Detection module 2, tested power supply 3 (specially three phase mains), current detection module 4, analogue load circuit 5, booster circuit 6 are inverse
Power transformation road 7, LC filter 8, current detection module 9, voltage detection module 10, dsp controller 11, driving circuit 12, driving electricity
Road 13 and driving circuit 14.Current detection module 2 is serially connected in the input terminal of tested power supply 3, the output end of current detection module 2 with
Dsp controller 11 is connected, and the input terminal of analogue load circuit 5 is connected with the output end of tested power supply 3, and current detection module 4 is gone here and there
It connects between analogue load circuit 5 and tested power supply 3, the output end of current detection module 4 is connected with dsp controller 11, driving
The output end of circuit 12 is connected with analogue load circuit 5, input terminal connect dsp controller 11, the input terminal of booster circuit 6 with
The output end of analogue load circuit 5 is connected, and the output end of driving circuit 13 is connected with booster circuit 6, and input terminal connects DSP control
The output end of device 11 processed, booster circuit 6 is connected with the input terminal of inverter circuit 7, and voltage detection module 10 connects defeated in booster circuit 6
Between the positive and negative anodes of outlet, the output end of voltage detection module 10 is connected with dsp controller 11, the output end of driving circuit 14 with
Inverter circuit 7 is connected, and input terminal connects dsp controller 11, and the output end of inverter circuit 7 is connected with LC filter 8, LC filtering
Device 8 is connected with the input terminal of tested power supply 3, and current detection module 9 connects between 3 input terminal of LC filter 8 and tested power supply, electricity
The output end of stream detection module 9 is connected with dsp controller 11；Analogue load circuit 5 and current detection module 4, dsp controller
11, driving circuit 12 constitutes closed-loop current control, and the output electric current by accurately controlling tested power supply 3, which is realized, simulates various loads
The function of characteristic.Dsp controller 11 outputs a control signal to driving circuit 13, realizes the control to booster circuit 6.Booster circuit
6 voltage increases for exporting analogue load circuit, to cooperate inverter circuit 7 to realize inversion.Current detection module 2 and voltage inspection
The detection signal for surveying module 10 is input in dsp controller 11, is believed by the output given value of current that algorithm obtains inverter circuit 7
Number, the work of inverter circuit 7 is driven by driving circuit 14.Dsp controller 11, driving circuit 14, current detection module 9, filter
Wave device 8 and inverter circuit 7 constitute closed loop, control the output electric current of inverter circuit 7.The output electric current of inverter circuit 7 send back to by
Survey the input terminal of power supply 3.Inductance filter 1 connects the harmonic propagation for avoiding inverter circuit 7 to export at power grid end to power grid, simultaneously
Power grid energy is carried out with the current energy of inverter circuit 7 as an electrical current in parallel.
As shown in Fig. 2, being the current control schematic diagram of inverter circuit.Ia, ib and ic are that current detection module 2 obtains in Fig. 1
The current signal arrived, ia*、ib*And ic*It is the fundamental current signal separated in ia, ib and ic by algorithm.ia*、ib*、
ic*By DC bus-bar voltage UiDifference is sought with ia, ib, ic after modulation, obtains reference current ia_ref, ib_ref and ic_ref.
Reference current ia_ref, ib_ref and ic_ref are the control Setting signal of inverter circuit 7 in Fig. 1.PI controller in Fig. 2
And PWM waveform generator is realized by dsp controller 11 in Fig. 1 with algorithm.Dsp controller 11, driving circuit in Fig. 1
14, inverter circuit 7, LC filter 8, current detection module 2, current detection module 9 and voltage detection module 10 are in a manner of Fig. 2
The closed loop current PI control for collectively forming inverter circuit, realizes the Real-time Feedback of current energy.
In the present embodiment, being tested power supply 3 is three-phase bridge uncontrollable rectifier and DC decompression chopper circuit structure.Current detecting
Module 2,4 and 9 is using the structure of Hall sensor binding signal conditioning circuit, and output signal is with the voltage signal of 0~3.3V
Form is output to dsp controller 11.The model TMS320F2812 of dsp controller 11.Analogue load circuit 5 is boost electricity
Road.Booster circuit 6 is full-bridge converter, and in LC filter 8, inductance value is 0.5mH, and capacitor value is 50nF.Inductor filter
The inductance value of device 1 is 1mH.Driving circuit 12,13,14 uses IGBT driver combination peripheral circuit, and it is negative to respectively drive simulation
Carry the IGBT in circuit 5, booster circuit 6 and inverter circuit 7.
When harmonic wave isolated form can present electronic load actual motion, power supply 3 is tested according to the voltage and current mode of setting, is passed through
Analogue load circuit 5 discharges.The voltage increase that booster circuit 6 exports analogue load circuit 5, is re-fed into inverter circuit
In 7.Inverter circuit 7 is according to the control mode in Fig. 2, by energy in the form of harmonic current and fundamental current, feeds back to tested
The input terminal of power supply 3.All harmonic currents needed for being tested power work at this time and most of fundamental current are by the defeated of inverter 7
Electric current provides out.Fraction fundamental current energy provided by power grid is that tested power supply 3 and harmonic wave isolated form can present electronic load
Energy loss when component works in circuit.Single inductance filter 1 connects in grid side, therefore the electric current that inverter circuit 7 exports
Harmonic wave only flows into the input terminal of tested power supply, has completely cut off interference of the harmonic wave to power grid.
The examples of implementation of the above are only the preferred embodiment of the utility model, not limit the utility model with this
Practical range, therefore all shapes according to the utility model, change made by principle, it should all cover in the protection scope of the utility model
It is interior.
Claims (3)
1. a kind of harmonic wave isolated form can present electronic load, it is characterised in that: including inductance filter, the first current detection module,
Tested power supply, the second current detection module, analogue load circuit, booster circuit, inverter circuit, LC filter, the inspection of third electric current
Survey module, dsp controller, voltage detection module, the first driving circuit, the second driving circuit, third driving circuit；Described first
Current detection module is serially connected in the input terminal of tested power supply, output end and the dsp controller phase of first current detection module
Even, the input terminal of the analogue load circuit is connected with the output end of tested power supply, and second current detection module is serially connected in
Between analogue load circuit and tested power supply, the output end of second current detection module is connected with dsp controller, and described
The output end of one drive circuit is connected with analogue load circuit, and input terminal connects dsp controller, the input of the booster circuit
End is connected with the output end of analogue load circuit, and the output end of second driving circuit is connected with booster circuit, input terminal
Dsp controller is connected, the output end of the booster circuit is connected with the input terminal of inverter circuit, and the voltage detection module connects
Between the positive and negative anodes of booster circuit output end, the output end of the voltage detection module is connected with dsp controller, and the third is driven
The output end of dynamic circuit is connected with inverter circuit, and input terminal connects dsp controller, and the output end and LC of the inverter circuit are filtered
Wave device is connected, and the LC filter is connected with the input terminal of tested power supply, and the third current detection module connects in LC filter
Between tested power input, the output end of the third current detection module is connected with dsp controller；First electric current
Detection module, tested power supply, the second current detection module, analogue load circuit, booster circuit, inverter circuit, LC filter and
Third current detection module constitutes closed loop, and the inductance filter is except closed loop, the input terminal and electricity of the inductance filter
Net is connected, and output end is connected with the input terminal of tested power supply.
2. a kind of harmonic wave isolated form according to claim 1 can present electronic load, it is characterised in that: the fictitious load electricity
Road uses boost circuit structure.
3. a kind of harmonic wave isolated form according to claim 1 can present electronic load, it is characterised in that: the booster circuit is adopted
With full-bridge converter structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854123.5U CN208297573U (en) | 2018-06-04 | 2018-06-04 | A kind of harmonic wave isolated form can present electronic load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820854123.5U CN208297573U (en) | 2018-06-04 | 2018-06-04 | A kind of harmonic wave isolated form can present electronic load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208297573U true CN208297573U (en) | 2018-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820854123.5U Expired - Fee Related CN208297573U (en) | 2018-06-04 | 2018-06-04 | A kind of harmonic wave isolated form can present electronic load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208297573U (en) |
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2018
- 2018-06-04 CN CN201820854123.5U patent/CN208297573U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181228 Termination date: 20190604 |