CN208862750U - A kind of frequency-conversion constant-current constant voltage source - Google Patents
A kind of frequency-conversion constant-current constant voltage source Download PDFInfo
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- CN208862750U CN208862750U CN201821870502.XU CN201821870502U CN208862750U CN 208862750 U CN208862750 U CN 208862750U CN 201821870502 U CN201821870502 U CN 201821870502U CN 208862750 U CN208862750 U CN 208862750U
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- current
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- voltage source
- constant voltage
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Abstract
The utility model relates to a kind of frequency-conversion constant-current constant voltage sources, including being sequentially connected the EMC circuit connect, input rectification circuit, level-one filter circuit, change the inverter circuit of constant current or constant voltage output state under the control action of control signal, secondary filter circuit, multi-tap rising current transformer, the different taps of switching multi-tap rising current transformer correspond to output gear switch module of the output end as power output end, it is connected and is used to connect the output terminal of test product to be measured with power output end, and the control system of corresponding control signal is issued for whether connecting test product to be measured according to output terminal.The utility model is based on whether connection product to be tested, pass through the switching to inverter circuit output state, constant current output is used when connecting product to be tested, constant voltage output is used in no product to be tested, it solves the problems, such as that test current precision is poor, also solves the problems, such as not being able to satisfy test current rapid response caused by due to continuous several times adjust voltage.
Description
Technical field
The utility model belongs to experiment apparatus field, and in particular to a kind of power supply, i.e., it is a kind of both to can be used as frequency-conversion constant-current
Source can be used as the power supply of variable-frequency constant potential source again.
Background technique
In devices such as test cable, low tension switches, need to treat test article loading power using power supply device.Existing skill
In art, power supply mostly uses voltage source to export, and acquisition passes through the electric current of test product to be measured, and the impedance of test product to be measured, then root is calculated
According to test electric current needed for test product, voltage source output is adjusted.This scheme is related to repeatedly adjusting voltage source output, is unable to satisfy survey
Rapid succession needed for trying equipment, while with the long-play of test equipment, the internal resistance of itself can change, but voltage
Under conditions of source output is constant, the inaccuracy of test electric current needed for will certainly making test equipment is unable to satisfy high-precision test
It is required that.
Summary of the invention
The purpose of the utility model is to provide one kind to solve the problems, such as test current precision and quick response problem, and can
Meet the frequency-conversion constant-current constant voltage source of current precision requirement.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of frequency-conversion constant-current constant voltage source is tested, it is characterised in that: the frequency-conversion constant-current for connecting test product to be measured
Constant voltage source includes being sequentially connected the EMC circuit connect, input rectification circuit, level-one filter circuit, the control work in control signal
It is described more with the inverter circuit of lower change constant current or constant voltage output state, secondary filter circuit, multi-tap rising current transformer, switching
The different taps of tap rising current transformer correspond to output end as the output gear switch module of power output end and the power supply
Output end is connected and is used to connect the output terminal of the test product to be measured, and the frequency-conversion constant-current constant voltage source further includes for root
The test product to be measured whether is connected according to the output terminal and issues the corresponding control system for controlling signal.
The control system includes detecting to the electric current and voltage of the output signal of the multi-tap rising current transformer
Detection module, the testing result based on the detection module judges whether to connect the test product to be measured and exports the corresponding control
The DSP module of signal processed.
The control system further includes the signal conversion module being set between the detection module and the DSP module.
The output gear switch module includes multi-position switch.
The input rectification circuit is diode rectifier circuit or IGBT rectification circuit.
The inverter circuit is the full bridge inverter using IGBT or MOSFET.
The secondary filter circuit is LC filter circuit.
The EMC circuit is spaced apart access power grid.
Since above-mentioned technical proposal is used, the utility model has the advantage that the utility model compared with prior art
Based on whether connection product to be tested, defeated using constant current when connecting product to be tested by the switching to inverter circuit output state
Out, constant voltage output is used in no product to be tested, solves the problems, such as that test current precision is poor, also solves because of continuous several times tune
Section voltage and caused by the problem of not being able to satisfy test current rapid response, without multiple devices are used in use, very just
It is prompt.
Detailed description of the invention
Attached drawing 1 is the schematic illustration of the frequency-conversion constant-current constant voltage source of the utility model.
Attached drawing 2 is the frequency-conversion constant-current constant voltage source work flow diagram of the utility model.
Specific embodiment
Embodiment shown in reference to the accompanying drawing is further described the utility model.
Embodiment one: a kind of frequency-conversion constant-current constant voltage source tested for connecting test product to be measured is connected with power grid
It connects, including being sequentially connected the EMC circuit connect, input rectification circuit, level-one filter circuit, inverter circuit, secondary filter circuit, more
Tap rising current transformer, output gear switch module, output terminal, further include control system.
Wherein the front end of EMC circuit is spaced apart access power grid, and input rectification circuit is that diode rectifier circuit or IGBT are whole
Current circuit, secondary filter circuit are LC filter circuit.
Inverter circuit is the full bridge inverter using IGBT or MOSFET, can be under the control action of control signal
Change constant current or constant voltage output state, i.e. control signal accesses each IGBT or MOSFET, thus by IGBT's or MOSFET
The control to full bridge inverter is realized in control.
Multi-tap rising current transformer has multiple taps and multiple output ends corresponding with each tap.Multi-tap up-flow
The input terminal of transformer is connected with inverter circuit.The output of multi-tap rising current transformer is arranged in output gear switch module
Side, the different taps for switching multi-tap rising current transformer correspond to output end as power output end.Export gear switch mould
Block includes multi-position switch.Output terminal is connected with power output end and is used to connect test product to be measured.
Whether control system is for connecting test product to be measured according to output terminal and issuing corresponding control signal to inverter circuit.
Control system includes the detection module detected to the electric current and voltage of the output signal of multi-tap rising current transformer, based on inspection
The testing result for surveying module judges whether to connect test product to be measured and exports the DSP module of corresponding control signal and be set to detection
Signal conversion module between module and DSP module.
When performing a test, product to be tested needs to be connected to the output on son.Control system first passes through the inspection of its detection module
The electric current and voltage of the output signal of multi-tap rising current transformer are surveyed, which is converted to digital signal by signal conversion module
It is sent into DSP module afterwards, so that DSP module can determine whether output terminal is connected with product to be tested accordingly.Such as have connected by
Test article, then DSP module issues corresponding control signal to inverter circuit and inverter circuit is made to work in constant current output state, then leads to
It crosses multi-tap rising current transformer and is tested by setting electric current to product to be tested output constant current signal；And if not connected tested
Product, then DSP module issues another corresponding control signal to inverter circuit and inverter circuit is made to work in constant voltage output state, exports
Constant voltage signal.To, reach automatic identification product to be tested whether there is or not falling off, gear switch carried out by output gear switch module,
The dual function that can achieve frequency-conversion constant-current and frequency-changing pressure stabilizing makes an equipment can satisfy the need of multiple types product to be tested
Ask, solve the problems, such as frequency-changing pressure stabilizing source output terminal cannot short circuit and frequency-conversion constant-current source output terminal cannot open a way, reduce because survey
The problem for trying design impedance variation bring test electric current inaccuracy, improves the precision and security reliability of test macro.
As shown in Fig. 2, the workflow of the frequency-conversion constant-current constant voltage source are as follows: after powering on, carry out parameter setting, including defeated
Electric current, output frequency, initial output gear etc. out.Electric current, the voltage of output terminal institute output signal are detected, examined
What is surveyed is the output signal of multi-tap rising current transformer, and the signal after detection is sent into DSP module and adopt its judgement currently should
Frequency-conversion constant-current power supply status is converted to constant current output, still frequency-changing pressure stabilizing state should be converted to using constant voltage output, so
Control inverter circuit is accordingly switched afterwards.If inverter circuit uses constant current output mode, and by multi-tap rising current transformer
Output end accesses output terminal, then tests as continuous current source output constant current signal product to be tested.If inverter circuit
Access output terminal using constant voltage output mode, and by the output end of multi-tap rising current transformer, then it is current and not connected tested
Test product need to judge whether to need to shut down further according to shutdown mode mark, if then shutting down, if being otherwise used as constant-voltage source work
Make.Continue to judge whether that access product to be tested is reconverted into constant current if accessing product to be tested again according to current and voltage signals
Current source output constant current signal is shut down if the time for not accessing product to be tested again always reaches preset setting value.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (8)
1. a kind of frequency-conversion constant-current constant voltage source is tested for connecting test product to be measured, it is characterised in that: the frequency-conversion constant-current is permanent
Voltage source include be sequentially connected the EMC circuit connect, input rectification circuit, level-one filter circuit, control signal control action
The lower inverter circuit for changing constant current or constant voltage output state, secondary filter circuit, multi-tap rising current transformer, switching more pumpings
The different taps of head rising current transformer correspond to output gear switch module, with the power supply defeated of the output end as power output end
Outlet is connected and is used to connect the output terminal of the test product to be measured, and the frequency-conversion constant-current constant voltage source further includes for basis
Whether the output terminal connects the test product to be measured and issues the corresponding control system for controlling signal.
2. a kind of frequency-conversion constant-current constant voltage source according to claim 1, it is characterised in that: the control system includes to institute
Detection module that the electric current and voltage for stating the output signal of multi-tap rising current transformer are detected, based on the detection module
Testing result judges whether to connect the test product to be measured and exports the DSP module of the corresponding control signal.
3. a kind of frequency-conversion constant-current constant voltage source according to claim 2, it is characterised in that: the control system further includes setting
The signal conversion module being placed between the detection module and the DSP module.
4. a kind of frequency-conversion constant-current constant voltage source according to claim 1, it is characterised in that: the output gear switch module
Including multi-position switch.
5. a kind of frequency-conversion constant-current constant voltage source according to any one of claim 1 to 4, it is characterised in that: the input
Rectification circuit is diode rectifier circuit or IGBT rectification circuit.
6. a kind of frequency-conversion constant-current constant voltage source according to any one of claim 1 to 4, it is characterised in that: the inversion
Circuit is the full bridge inverter using IGBT or MOSFET.
7. a kind of frequency-conversion constant-current constant voltage source according to any one of claim 1 to 4, it is characterised in that: the second level
Filter circuit is LC filter circuit.
8. a kind of frequency-conversion constant-current constant voltage source according to any one of claim 1 to 4, it is characterised in that: the EMC electricity
Road is spaced apart access power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821870502.XU CN208862750U (en) | 2018-11-14 | 2018-11-14 | A kind of frequency-conversion constant-current constant voltage source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821870502.XU CN208862750U (en) | 2018-11-14 | 2018-11-14 | A kind of frequency-conversion constant-current constant voltage source |
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| Publication Number | Publication Date |
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| CN208862750U true CN208862750U (en) | 2019-05-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113093850A (en) * | 2021-03-17 | 2021-07-09 | 海安天一智控设备有限公司 | Method for generating standard sine wave AC constant current source |
-
2018
- 2018-11-14 CN CN201821870502.XU patent/CN208862750U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113093850A (en) * | 2021-03-17 | 2021-07-09 | 海安天一智控设备有限公司 | Method for generating standard sine wave AC constant current source |
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