CN206023613U - A kind of three-phase inverter power supply - Google Patents
A kind of three-phase inverter power supply Download PDFInfo
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- CN206023613U CN206023613U CN201620959775.6U CN201620959775U CN206023613U CN 206023613 U CN206023613 U CN 206023613U CN 201620959775 U CN201620959775 U CN 201620959775U CN 206023613 U CN206023613 U CN 206023613U
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- phase inverter
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- power supply
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Abstract
The utility model discloses a kind of three-phase inverter power supply, the DSP control module being connected including three single-phase inverter modules and with each single-phase inverter module, the same outfan of three single-phase inverter modules is using zero line connection altogether, permutator of another outfan connection of each single-phase inverter module with input all the way and two-way input, using live wire connection altogether, another outfan of each permutator is a power output end of three-phase inverter power supply for the same output of three permutatoies.The three-phase inverter power supply, by each single-phase inverter module is connected with the permutator with input all the way and two-way output, by controlling permutator, switch its state, so that three-phase inverter can have a power input that can be input into relatively high power or three power inputs that can be input into smaller power, so that three-phase inverter power supply can adapt to single-phase, three phase mains and single-phase, threephase load so as to which application is very flexible and changeable.
Description
Technical field
This utility model is related to inverter technology field, more specifically, it relates to a kind of three-phase inverter power supply.
Background technology
Solar energy power generating be including the multinational governmental support including China long-term energy strategy important content, and
And have been obtained for being widely applied, and inverter is the important component part in whole solar photovoltaic generation system.Inversion
The classification of the outfan number of phases pressed by device, is segmented into single-phase inverter and three-phase inverter.Single-phase inverter can be divided into half again by structure
Bridge inverter and full-bridge inverter.Three-phase inverter can be divided into three-phase three-wire system inverter and three-phase four-wire system inverter again.Real
When border is applied, single-phase inverter or three-phase inverter are selected according to different occasions.
Conventional three phase inverter is when threephase load is balanced, it is possible to obtain reasonable output characteristics.But not
Under the conditions of balanced load, stronger coupled relation all had between phase and phase on circuit and magnetic circuit due to power supply, and
Inverter output impedance and filtering impedance can not be zero.This just has influence on the symmetry of three phase mains output, the imbalance of load
Degree more has a strong impact on bigger.When different single, threephase load are powered by same three phase mains, this problem is just more dashed forward
Go out.The asymmetric of phase place consequently also causes the asymmetric of line voltage, consequently, it is possible to adverse consequencess are caused to load, to cause
More sensitive equipment cisco unity malfunction.
The Chinese patent of Application No. CN201420462974.7 discloses a kind of three-phase inverter electricity controlled based on DSP
Source, it include 3 separate single-phase inverter modules, and the DSP controls being connected respectively with 3 single-phase inverter modules
Module and duplex frequency boostering transformer, wherein, DSP control module includes that DSP control chips, DC voltage detection circuit, IGBT are handed over
Stream current detection circuit, ac voltage detection circuit, isolation drive and protection circuit, sound light alarming circuit and RS485 communication electricity
Road, DC input voitage are input to the IGBT full bridge inverters of single-phase inverter module, the SPWM exported by DSP control chips
Signal drives full-bridge inverting, inverse of the DC into AC, alternating current to be transformed into power frequency friendship through duplex frequency boostering transformer again
Stream output.The characteristics of there is efficiency high, good stability using the three-phase inverter power supply of said structure.
But, operationally, which can only be exported the power supply of lower-wattage to this kind of inverter power supply by a single-phase inverter
Or by the relatively low three phase mains of three single-phase inverter module outputs, which can not export the single-phase electricity of relatively high power
Source, the scope for causing which applicable are narrower.Therefore, this inverter power supply still has much room for improvement.
Utility model content
In view of the shortcomings of the prior art, the purpose of this utility model is to provide a kind of three-phase inverter power supply, should
Input and the output number of phases scalable of three-phase inverter power supply is planted, so which can adapt to the power supply in the different numbers of phases and power
And load, its application is very flexible.
For achieving the above object, this utility model provides following technical scheme：
A kind of three-phase inverter power supply, is connected including three single-phase inverter modules and with each single-phase inverter module
DSP control module, is characterized in that：, using zero line connection altogether, each is single-phase inverse for the same outfan of three single-phase inverter modules
Become permutator of another outfan connection of device module with input all the way and two-way input, three permutatoies same
Output is exported for a power supply of three-phase inverter power supply using live wire connection altogether, another outfan of each permutator
End.
By such scheme, when charge power supply is single phase poaer supply, some permutator is operated so as to make which
The branch road of connection civil power live wire is switched on, then power supply is connected with the live wire input of the permutator and with the permutator
Output module zero line input connection, you can be charged；And for three-phase charge power supply, then need to open three conversions
Guan Jun switches to the state that is switched on of branch road of connection civil power live wire, then connects corresponding with three permutatoies for three phase mains
Get up, you can to three-phase inverter power source charges；In three-phase inverter power supply powering load, for single-phase load, select
One output module is exported as power supply, and the permutator being connected with the output module is switched to the shape that output branch road is switched on
State, can power to single-phase load；For threephase load, three permutatoies are switched to output branch road shape switched on
State, can power to threephase load.Thus, can make three-phase inverter power supply can adapt to single-phase, three phase mains and single-phase,
Threephase load so as to which application is very flexible and changeable.
Preferably：The single-phase inverter module includes output module, power model and drive module, described
Output module includes voltage detection module, the current detection module being connected with DSP control module, and the power model is MOSFET
Full bridge inverter, the DSP control module are connected with MOSFET full-bridge circuits by drive module.
By such scheme, the constantly detection to output voltage, electric current can be realized, control ginseng is provided for DSP control module
Number.
Preferably：The output module also includes filtration module.
By such scheme, the clutter of input power and out-put supply can be filtered, make three-phase inverter power supply more steady
Calmly by ground operation.
Preferably：Hall current sensor that the current detection module includes being sequentially connected, sampling resistor and
Operational amplifier.
Preferably：The current detection module includes multiple sampling resistors being mutually in series and and sampling resistor
The operational amplifier of connection.
Compared with prior art, the utility model has the advantages that：The three-phase inverter power supply, by by each single-phase inversion
Device module is connected with the permutator with input all the way and two-way output, by controlling permutator, switches its state, so as to
Allow three-phase inverter be input into less work(with a power input that can be input into relatively high power (outfan) or three
The power input of rate（Outfan）, so that three-phase inverter power supply can adapt to single-phase, three phase mains and single-phase, three-phase
Load so as to which application is very flexible and changeable.
Description of the drawings
Fig. 1 is the circuit theory diagrams of three-phase inverter in the present embodiment；
Circuit diagrams of the Fig. 2 for single-phase inverter module；
Circuit diagrams of the Fig. 3 for alternating voltage detection module；
Circuit diagrams of the Fig. 4 for alternating current detection module；
Fig. 5 is drive circuit figure.
Specific embodiment
With reference to Fig. 1, a kind of three-phase inverter power supply, including three identical single-phase inverter modules：Single-phase inverter mould
Block R, single-phase inverter module S and single-phase inverter module T, single-phase inverter module R are included positioned at transformation coil high-pressure side
Output module and the power model positioned at transformation coil low-pressure side and drive module, drive module is DC power supplier,
DSP control module includes that DSP main control chips, the control end of DSP control chips are connected with drive module, one end of output module with
Civil power zero line connects, and the other end of output module is connected with permutator R, and permutator is input all the way and opening that two-way is exported
Close, outfan of permutator connects the live wire of civil power, the other end of permutator is used as the one of three-phase inverter power supply
Individual single-phase output end.The connection and single-phase inverter module T of single-phase inverter module S and its permutator S is changed out with which
Close T and be also adopted by above-mentioned connection, one end of wherein output module S connects the zero line of civil power, and one end of output module S also connects civil power
Zero line, same one end of three output modules constitutes zero line connection altogether；The live wire of one end connection civil power of permutator S, and its
A single-phase output end of the other end as three-phase inverter.The live wire of one end connection civil power of permutator T, and its other end
A single-phase output end as three-phase inverter.The same outfan of three permutatoies constitutes live wire connection altogether.
By switching each permutator, certain for connecting each permutator is selected to export all the way, in external power source to three
During phase inverter power source charges, three-phase inverter power supply can be made to be suitable for the charge power supply of single-phase or three-phase, such as conversion is opened
The one end for closing the connection civil power live wire of S is connected, and live wire provides the charge power supply of 2KW, can by the effect of single-phase inverter module S
To charge to its drive module, and one end that three permutatoies connect civil power live wire is turned on, then live wire provides filling for 6KW
During power supply, the respective drive module of three single-phase inverter modules can be charged normal；And three-phase inverter power supply to
During load supplying, single three-phase inverter module can provide the power supply of single-phase 2KW, and three single-phase inverter modules can be provided often
Phase power is the power supply of 2KW, it is also possible to which the power supply that three inverter modules are provided is merged into the power supply for providing single-phase 6KW.
So, just can by the state of control each permutator make three-phase inverter power supply can adapt to different capacity charge power supply with
And load, make the application of three-phase inverter power supply more flexible.
With reference to Fig. 2, output module includes filtration module and voltage, current detection module, and power model is MOSFET full-bridges
Inverter circuit.Current detection module is ac voltage detection circuit, and which is mainly for detection of through single-phase inverter module
The inversion of MOSFET full bridge inverters and the alternating current after the boosting of transformation coil；And voltage detection module is alternating current
Pressure detection circuit, which is mainly for detection of the MOSFET full bridge inverters inversion through single-phase inverter module and through becoming
Alternating voltage after the boosting of line ball circle.
With reference to Fig. 3, ac voltage detection circuit 24 includes AC voltage transformer TV1, and and AC voltage transformer
The operational amplifier A 1 that TV1 is connected.
With reference to Fig. 4, alternating current current detection circuit include Hall current sensor CS1, the sampling resistor R22 being sequentially connected and
Operational amplifier A 4, A5.
The outfan and ac voltage detection circuit of the alternating current current detection circuit that DSP control chips input is connected
Outfan.The analogue signals such as the voltage for detecting, electric current, temperature are sent out by alternating current current detection circuit and ac voltage detection circuit
The A/D ports of DSP control chips are delivered to, is converted through DSP control chips inter-process, if detected value exception, DSP controls mould
Block can send early warning to monitoring backstage.
Drive module includes that 4 drive the drive circuit for protecting each MOSFET full bridge inverter respectively, with reference to Fig. 5,
Each drive circuit includes HCPL3180 optocouplers, is specifically described with one of parallel circuit, the output of DSP control chips
Pwm signal is driven through light-coupled isolation, then after signal amplifies, the pwm signal of output is passed through and increases driving force, most
The grid level of MOSFET is input to afterwards.
Each single-phase inverter module is independently-powered by single drive module, and by DSP control chip independent controls,
Individually can operate in a single-phase inverter power supply, it is also possible to which three modules are operated in three-phase inverter power supply together.
DSP control chips export 12 road SPWM drive signals, drive the MOSFET full bridge inverters of each single-phase inverter module, pass through
The three single-phase inverter module alternating currents that crosses after MOSFET full-bridge circuit inversions through three transformation coil boostings, are obtained most again
Whole three-phase output voltage.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to
Go out, for those skilled in the art, some improvement under the premise of without departing from this utility model principle and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (5)
1. a kind of three-phase inverter power supply, is connected including three single-phase inverter modules and with each single-phase inverter module
DSP control module, is characterized in that：, using zero line connection altogether, each is single-phase inverse for the same outfan of three single-phase inverter modules
Become permutator of another outfan connection of device module with input all the way and two-way input, three permutatoies same
Output is exported for a power supply of three-phase inverter power supply using live wire connection altogether, another outfan of each permutator
End.
2. three-phase inverter power supply according to claim 1, is characterized in that：The single-phase inverter module includes exporting mould
Block, power model and drive module, the output module include voltage detection module, the electric current being connected with DSP control module
Detection module, the power model are MOSFET full bridge inverters, and the DSP control module is by drive module and MOSFET
Full-bridge circuit connects.
3. three-phase inverter power supply according to claim 2, is characterized in that：The output module also includes filtration module.
4. three-phase inverter power supply according to claim 2, is characterized in that：The voltage detection module includes mutual induction of voltage
Device and the operational amplifier being connected with voltage transformer.
5. three-phase inverter power supply according to claim 2, is characterized in that：The current detection module includes being sequentially connected
Hall current sensor, sampling resistor and operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620959775.6U CN206023613U (en) | 2016-08-26 | 2016-08-26 | A kind of three-phase inverter power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620959775.6U CN206023613U (en) | 2016-08-26 | 2016-08-26 | A kind of three-phase inverter power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206023613U true CN206023613U (en) | 2017-03-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620959775.6U Expired - Fee Related CN206023613U (en) | 2016-08-26 | 2016-08-26 | A kind of three-phase inverter power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206023613U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107871428A (en) * | 2017-10-31 | 2018-04-03 | 浙江大学城市学院 | A kind of inverter power circuit |
| CN112444770A (en) * | 2019-08-30 | 2021-03-05 | 国网山东省电力公司东营市东营区供电公司 | Electric power metering device inspection box |
-
2016
- 2016-08-26 CN CN201620959775.6U patent/CN206023613U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107871428A (en) * | 2017-10-31 | 2018-04-03 | 浙江大学城市学院 | A kind of inverter power circuit |
| CN112444770A (en) * | 2019-08-30 | 2021-03-05 | 国网山东省电力公司东营市东营区供电公司 | Electric power metering device inspection box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20170315 Termination date: 20210826 |