CN209030117U - A kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach - Google Patents
A kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach Download PDFInfo
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- CN209030117U CN209030117U CN201821950860.1U CN201821950860U CN209030117U CN 209030117 U CN209030117 U CN 209030117U CN 201821950860 U CN201821950860 U CN 201821950860U CN 209030117 U CN209030117 U CN 209030117U
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Abstract
The utility model relates to power technique fields; more particularly to a kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach; it further include input current sampling and AD conversion module, full bridge inverter module, LC low-pass filter circuit module, overcurrent protection module, auxiliary power module and single chip control module including direct current supply input terminal；Direct current supply input terminal, input current sampling and AD conversion module, full bridge inverter module and LC low-pass filter circuit module are sequentially connected in series; single chip control module is separately connected input current sampling and AD conversion module, full bridge inverter module and overcurrent protection module, and auxiliary power module is separately connected input current sampling and AD conversion module, full bridge inverter module, overcurrent protection module and single chip control module.The power-supply system is high-efficient, and up to 94%, output voltage load regulation is less than 0.100%；Output voltage frequency stepping between 20 ~ 100Hz is adjustable；And man-machine interaction is good.
Description
Technical field
The utility model belongs to power technique fields more particularly to a kind of single-phase sine-converter electricity adjusted based on feed forward approach
Source system.
Background technique
Inverter is a kind of electrical energy changer for direct current being become alternating current, its DC voltage inversion input
It is exported at alternating voltage.In modern production, inverter is widely used, be included in communication, aerospace, it is military, medical,
The related fieldss such as industrial and civilian.For Single-Phase Inverter Source because its is easy to use, use scope is wider, especially civilian and industrial
Field uses very extensive.
With the development of Digital Electronic Technique, current digital inverter system occupies the maximum city of inverter
, but most of product currently on the market is to use the method for carrying out feedback regulation according to the value of output voltage, it is not only square
Case is complicated, and reduces the efficiency of inverter.In addition, there are still outputs for most of Single-Phase Inverter Source currently on the market
Voltage waveform is not sufficiently stable, the imperfect problem of load regulation, and few design overcurrent protections and display working condition
Function, man-machine interaction are not good enough.
Utility model content
The purpose of the utility model is to provide the frequencies that one kind had both been adjustable output voltage, have overcurrent protection function and reality
When display working condition, and the efficient single-phase Sinusoidal Inverter system of simple, reliable, output voltage stabilization.
In order to achieve the above purposes, the technical solution adopted by the utility model is: it is a kind of based on feed forward approach adjust it is single-phase just
String inverter system, including direct current supply input terminal further include input current sampling and AD conversion module, full bridge inverter
Module, LC low-pass filter circuit module, overcurrent protection module, auxiliary power module and single chip control module；Direct current supply is defeated
Enter end, input current sampling and AD conversion module, full bridge inverter module and LC low-pass filter circuit module and is sequentially connected in series company
It connects, single chip control module is separately connected input current sampling and AD conversion module, full bridge inverter module and overcurrent protection
Module, auxiliary power module are separately connected input current sampling and AD conversion module, full bridge inverter module, overcurrent protection mould
Block and single chip control module.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, input current sampling and AD conversion
Module includes current sampling circuit, filter circuit and analog to digital conversion circuit, wherein current sampling circuit includes direct current supply input
Rectify pole series connection constantan wire sampling resistor, the both ends parallel connection of constantan wire sampling resistor accesses high-precision current and analyzes monitoring chip
INA282, filter circuit use RC filter circuit, and analog to digital conversion circuit uses 16 analog-digital chip ADS1118；In high precision
After amperometry monitoring chip INA282 is used to detect the voltage difference at constantan wire sampling resistor both ends and is amplified certain multiple
Output voltage；Output voltage is input to the AIN1 pin of 16 analog-digital chip ADS1118 after RC filter circuit；16
Position analog-digital chip ADS1118 is communicated by serial communication with single chip control module, and sample rate current is transmitted to
In single chip control module.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, the main electricity of full bridge inverter module
Road includes the H-bridge inverter circuit of high-power switchgear pipe composition；The input terminal of full bridge inverter module is concatenated into constantan wire sampling
After resistance, the input terminal of output termination LC low-pass filter circuit module.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, H-bridge inverter circuit includes first, the
Two, third, the 4th high-power switchgear pipe CSD19536 and the first, second half-bridge driven chip UCC27211, the first half-bridge driven
HI, LI of chip UCC27211 is connected with LI, HI of the second half-bridge driven chip UCC27211 respectively, and respectively at single-chip microcontroller
The two poles of the earth for the SPWM drive waveforms that control module generates are connected, and constitute boostrap circuit by diode and bootstrap capacitor, enable
Enough drive high-side switch tube；The end HO and LO of first half-bridge driven chip UCC27211 is by the first driving resistance and the first protection
Resistance is connected with the grid of the first high-power switchgear pipe CSD19536 and the second high-power switchgear pipe CSD19536 respectively, and the second half
It is opened by the second driving resistance and the second protective resistance respectively at the first high power at the end HO and LO of bridge driving chip UCC27211
The grid for closing pipe CSD19536 and the second high-power switchgear pipe CSD19536 is connected；First, second high-power switchgear pipe
The high side pipe drain electrode of CSD19536 and third, the 4th high-power switchgear pipe CSD19536 are connected with direct current supply input terminal, low
The source grounding of side pipe, the output end that the source electrode of high side pipe is connected with the drain electrode of downside pipe as full-bridge circuit；Full-bridge circuit
It is serially connected in after input current sampling and AD conversion module, output termination LC low-pass filter circuit module.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, LC low-pass filter circuit module includes
The E type inductance and CBB electric capacity that EE55 magnetic core turns to, wherein inductance value is 1.8mH, capacitance 34.7uF；LC low-pass filtering
The output end of the input termination full bridge inverter module of circuit module, ac voltage output of the output end as system.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, single chip control module includes
MSP430F6638 super low power consuming single chip processor, OLED display screen and 4 × 4 matrix keyboards；SPWM wave passes through double polarity sine arteries and veins
Width modulation generates.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, auxiliary power module includes+3.3V
With+9V accessory power supply, it is all made of Buck type decompression chip TPS5430；+ 9V accessory power supply is each half-bridge driven chip UCC27211
Power supply ,+3.3V accessory power supply be MSP430F6638 super low power consuming single chip processor, high-precision current analyze monitoring chip INA282 with
And 16 analog-digital chip ADS1118 power supplies.
In the above-mentioned single-phase Sinusoidal Inverter system adjusted based on feed forward approach, overcurrent protection module includes triode
Driving circuit and relay；Overcurrent protection module is realized by control+9V accessory power supply to inverter circuit module overcurrent protection.
The utility model has the beneficial effects that using single-chip microcontroller as control core, keeps system output frequency adjustable, reduce
System load regulation；Output voltage is adjusted using feed forward approach, i.e., according to the matched curve relationship of input current and output electric current
It is adjusted, stablizes system output voltage；And there is the function of overcurrent protection function and real-time display system working condition.Entirely
System structure is simple and compact, and rated output alternating voltage is 10V 50Hz, and for load regulation less than 0.100%, frequency can be 20
Stepping is adjustable within the scope of~100Hz, and overcurrent protection threshold current is 1.5A, and system whole efficiency is up to 94%.
Detailed description of the invention
Fig. 1 is one embodiment system global structure block diagram of the utility model；
Wherein, the sampling of 1- input current and AD conversion module, 2- full bridge inverter module, 3-LC low-pass filter circuit mould
Block, 4- auxiliary power module, 5- overcurrent protection module, 6- single chip control module；
Fig. 2 is the sampling of one embodiment input current and AD conversion module circuit diagram of the utility model；
Fig. 3 is one embodiment full bridge inverter module circuit diagram of the utility model；
Fig. 4 is one embodiment LC low-pass filter circuit module circuit diagram of the utility model；
Fig. 5 (a) is one embodiment+9V auxiliary power circuit figure of the utility model, and Fig. 5 (b) is the utility model
One embodiment+3.3V auxiliary power circuit figure；
Fig. 6 is one embodiment overcurrent protection module circuit diagram of the utility model；
Fig. 7 is one embodiment single chip control module schematic diagram of the utility model.
Specific embodiment
The embodiments of the present invention is described in detail with reference to the accompanying drawing.
The present embodiment provides a kind of simple, the easy-to-use, output voltage stabilization of production, load regulation it is low, it is high-efficient and
The good inverter of man-machine interaction.
It is achieved through the following technical solutions, a kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach, including straight
Energization input is flowed, further includes input current sampling and AD conversion module, full bridge inverter module, LC low-pass filter circuit mould
Block, overcurrent protection module, auxiliary power module and single chip control module；System dc feeder ear, input current sampling and AD
Conversion module, full bridge inverter module and LC low-pass filter circuit module are sequentially connected in series, and overcurrent protection module control is complete
Whether bridge inverter circuit module works, and the data of single chip control module processing input current sampling simultaneously control full bridge inverter
The working condition of module, auxiliary power module are each chip power supply in system.
Also, input current sampling and AD conversion module include constantan wire sampling resistor, high-precision current analysis monitoring core
Piece INA282 and 16 analog-digital chip ADS1118；Constantan wire sampling resistor is concatenated into the anode of system dc feeder ear
Input terminal.
Also, the H-bridge inverter circuit that the main circuit of full bridge inverter module is made of high-power switchgear pipe；Full-bridge is inverse
The input terminal for becoming circuit module is concatenated into after constantan wire sampling resistor, the input of output termination LC low-pass filter circuit module
End.
Moreover, H-bridge inverter circuit module includes the first, second, third, fourth high-power switchgear pipe CSD19536 and the
One, the second half-bridge driven chip UCC27211, each half-bridge driven chip UCC27211 is all made of+9V power supply power supply, input
End HIN and LIN connects single chip control module and generates the reversed SPWM wave of two-way, HO and LO output end is respectively at two in H bridge
High-power switchgear pipe CSD19536 is connected.
Also, LC low-pass filter circuit module includes the E type inductance turned to by EE55 magnetic core and CBB electric capacity, wherein electricity
Inductance value is 1.8mH, capacitance 34.7uF；The output of the input termination full bridge inverter module of LC low-pass filter circuit module
End, output end is the ac voltage output of system.
Also, single chip control module uses MSP430F6638 super low power consuming single chip processor, further includes that OLED shows screen
With 4 × 4 matrix keyboards；SPWM wave is generated using double polarity sine pulsewidth modulation.
Also, auxiliary power module includes+3.3V and+9V accessory power supply, is all made of Buck type decompression chip TPS5430
It generates；+ 9V accessory power supply is half-bridge driven chip UCC27211 power supply, and+3.3V accessory power supply is MSP430F6638 super low-power consumption
Single-chip microcontroller, high-precision current analysis monitoring chip INA282 and 16 analog-digital chip ADS1118 power supplies.
Also, overcurrent protection module includes transistor drive circuit and relay；Overcurrent protection module by
The control of MSP430F6638 super low power consuming single chip processor, and full-bridge inverting electricity is controlled by the way that whether control+9V accessory power supply works
The working condition of road module；When detecting that system power is more than threshold value, the output of MSP430F6638 super low power consuming single chip processor is high
Level makes relay work, and the circuit of disconnection+9V auxiliary power output end makes inverter circuit module from service, to realize
Overcurrent protection.
When it is implemented, as shown in Figure 1, a kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach, including straight
Energization input is flowed, ac voltage output further includes input current sampling and AD conversion module 1, full bridge inverter module
2, LC low-pass filter circuit module 3, auxiliary power module 4, overcurrent protection module 5 and single chip control module 6；Direct current supply
Input terminal, input current sampling and AD conversion module 1, full bridge inverter module 2 and LC low-pass filter circuit module 3 are successively gone here and there
Connection connection, overcurrent protection module 5 control whether full bridge inverter module 2 works, and single chip control module 6 handles input current
The data of sampling and the working condition for controlling full bridge inverter module 2, auxiliary power module 4 are each chip power supply in system.
As shown in Fig. 2, the input current sampling of the present embodiment and AD conversion module 1 include current sampling circuit, filtered electrical
Road and analog to digital conversion circuit, wherein current sampling circuit is in system electrode input end series connection constantan wire sampling resistor Res2, health
The both ends copper wire sampling resistor Res2 parallel high-accuracy amperometry monitoring chip INA282；Filter circuit uses RC filter circuit,
Analog to digital conversion circuit uses ADS1118 modulus conversion chip.High-precision current analysis monitoring chip INA282 detection constantan wire is adopted
The voltage difference at the both ends sample resistance Res2 simultaneously exports after being amplified certain multiple in the form of a voltage；Output voltage is filtered by RC
The AIN1 pin of the ADS1118 modulus conversion chip of analog to digital conversion circuit is input to after circuit；ADS1118 modulus conversion chip is logical
It crosses serial communication to be communicated with single chip control module 6, the size of sample rate current is passed in single chip control module 6.
As shown in figure 3, the full bridge inverter module of the present embodiment includes the first, second, third, fourth high-power switchgear
The H bridge that pipe CSD19536 33,34,35,36 is constituted, and connect the first half-bridge driven chip UCC27211 31, the drive of the second half-bridge
Dynamic chip UCC2721132, HI, LI of the first half-bridge driven chip UCC2721131 respectively with the second half-bridge driven chip
LI, HI of UCC2721132 is connected, and the two poles of the earth of the SPWM drive waveforms respectively at single chip control module generation are connected, and lead to
It crosses diode and bootstrap capacitor constitutes boostrap circuit, allow to drive high-side switch tube；First half-bridge driven chip UCC27211
31 end HO and LO by first driving resistance and the first protective resistance respectively with the first high-power switchgear pipe CSD1953633 and
The grid of second high-power switchgear pipe CSD1953634 is connected, the end the HO and LO warp of the second half-bridge driven chip UCC2721132
The second driving resistance and the second protective resistance are crossed respectively at third high-power switchgear pipe CSD1953635 and the 4th high-power switchgear
The grid of pipe CSD1953636 is connected；The drain electrode of the high side pipe of two groups of high-power switchgear pipe CSD19536 is inputted with direct current supply
End is connected, the source grounding of downside pipe, and the source electrode of high side pipe is connected as full bridge inverter module with the drain electrode of downside pipe
Output end.Full bridge inverter module is serially connected in after input current sampling and AD conversion module, output termination LC low pass
Filter circuit module.
As shown in figure 4, the LC low-pass filter circuit of the present embodiment is to include 41 He of E type inductance that EE55 magnetic core turns to
The cutoff frequency of CBB electric capacity 42, inductance value 1.8mH, capacitance 34.7uF, this low-pass filter is 637Hz, can be filtered
Except carrier wave makes low-pass filter export undistorted sinusoidal voltage；LC low-pass filter circuit module input connects full-bridge inverting electricity
The output end of road module, output end are system ac voltage output.
The auxiliary power module of the present embodiment includes+9V accessory power supply and+3.3V accessory power supply, such as Fig. 5 (a), Fig. 5 (b)
Shown, auxiliary power circuit uses Buck type decompression chip TPS5430 to generate, and the internal reference voltage generated is
1.221V, then using the resistance of 68K, 5.6K and 5.1K as divider resistance ,+3.3V accessory power supply uses+9V accessory power supply
The resistance of 10K, 680K and 5.1K are as divider resistance；+ 9V accessory power supply is the power supply of UCC27211 chip ,+3.3V accessory power supply
For the power supply of INA282 chip, ADS1118 chip and MSP430F6638 super low power consuming single chip processor.
As shown in fig. 6, the overcurrent protection module of the present embodiment includes relay circuit 61 and transistor drive circuit 62, when
After detecting controller, when MSP430F6638 super low power consuming single chip processor exports a high level, transistor emitter is led
It is logical, make collector there is electric current to flow through, armature is connected to the other side inside relay, and circuit is disconnected；Overcurrent protection module passes through control
The output voltage state of system+9V accessory power supply controls whether full-bridge circuit works, to realize overcurrent protection function.
As shown in fig. 7, the single chip control module of the present embodiment includes MSP430F6638 super low power consuming single chip processor, OLED
Screen and 4 × 4 matrix keyboards, the working condition for the system that MSP430F6638 super low power consuming single chip processor will test are transferred to
OLED screen curtain is simultaneously shown that 4 × 4 matrix keyboards are used to be arranged the frequency of system output voltage；MSP430F6638 super low-power consumption
Single-chip microcontroller inner utilization double polarity sine pulsewidth modulation generates SPWM wave to drive full bridge inverter.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
Although being described in conjunction with the accompanying specific embodiment of the present utility model above, those of ordinary skill in the art
It should be appreciated that these are merely examples, various deformation or modification can be made to these embodiments, it is practical without departing from this
Novel principle and essence.The scope of the utility model is only limited by the claims that follow.
Claims (8)
1. a kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach, including direct current supply input terminal, characterized in that also
Including input current sampling and AD conversion module, full bridge inverter module, LC low-pass filter circuit module, overcurrent protection mould
Block, auxiliary power module and single chip control module；Direct current supply input terminal, input current sampling and AD conversion module, full-bridge
Inverter circuit module and LC low-pass filter circuit module are sequentially connected in series, and single chip control module is separately connected input current and adopts
Sample and AD conversion module, full bridge inverter module and overcurrent protection module, auxiliary power module are separately connected input current and adopt
Sample and AD conversion module, full bridge inverter module, overcurrent protection module and single chip control module.
2. the single-phase Sinusoidal Inverter system adjusted as described in claim 1 based on feed forward approach, characterized in that input current
Sampling and AD conversion module include current sampling circuit, filter circuit and analog to digital conversion circuit, wherein current sampling circuit includes
Direct current supply input anode series connection constantan wire sampling resistor, the both ends parallel connection of constantan wire sampling resistor access high-precision current analysis
Monitoring chip INA282, filter circuit use RC filter circuit, and analog to digital conversion circuit uses 16 analog-digital chips
ADS1118；High-precision current analysis monitoring chip INA282 be used for detect constantan wire sampling resistor both ends voltage difference and by its
Output voltage after amplification certain multiple；Output voltage is input to 16 analog-digital chip ADS1118 after RC filter circuit
AIN1 pin；16 analog-digital chip ADS1118 are communicated by serial communication with single chip control module, and will be adopted
Sample electric current is transmitted in single chip control module.
3. the single-phase Sinusoidal Inverter system adjusted as claimed in claim 2 based on feed forward approach, characterized in that full-bridge inverting
The main circuit of circuit module includes the H-bridge inverter circuit of high-power switchgear pipe composition；The input terminal string of full bridge inverter module
It is connected to after constantan wire sampling resistor, the input terminal of output termination LC low-pass filter circuit module.
4. the single-phase Sinusoidal Inverter system adjusted as claimed in claim 3 based on feed forward approach, characterized in that H bridge inversion
Circuit includes the first, second, third, fourth high-power switchgear pipe CSD19536 and the first, second half-bridge driven chip
UCC27211, HI, LI of the first half-bridge driven chip UCC27211 LI, HI with the second half-bridge driven chip UCC27211 respectively
It is connected, and the two poles of the earth of the SPWM drive waveforms respectively at single chip control module generation are connected, and electric by diode and bootstrapping
Hold and constitute boostrap circuit, allows to drive high-side switch tube；The end HO and LO of first half-bridge driven chip UCC27211 is by the
One driving resistance and the first protective resistance respectively with the first high-power switchgear pipe CSD19536 and the second high-power switchgear pipe
The grid of CSD19536 is connected, and the end HO and LO of the second half-bridge driven chip UCC27211 is protected by the second driving resistance and second
Resistance is protected to be connected respectively at the grid of the first high-power switchgear pipe CSD19536 and the second high-power switchgear pipe CSD19536；The
One, the second high-power switchgear pipe CSD19536 and third, the 4th high-power switchgear pipe CSD19536 the drain electrode of high side pipe and directly
It flows energization input to be connected, the source grounding of downside pipe, the source electrode of high side pipe is connected as full-bridge electricity with the drain electrode of downside pipe
The output end on road；Full-bridge circuit is serially connected in after input current sampling and AD conversion module, output termination LC low-pass filtering electricity
Road module.
5. the single-phase Sinusoidal Inverter system adjusted as described in claim 1 based on feed forward approach, characterized in that LC low pass filtered
Wave circuit module includes the E type inductance and CBB electric capacity that EE55 magnetic core turns to, and wherein inductance value is 1.8mH, and capacitance is
34.7uF；The output end of the input termination full bridge inverter module of LC low-pass filter circuit module, output end is as system
Ac voltage output.
6. the single-phase Sinusoidal Inverter system adjusted as claimed in claim 4 based on feed forward approach, characterized in that single-chip microcontroller control
Molding block includes MSP430F6638 super low power consuming single chip processor, OLED display screen and 4 × 4 matrix keyboards；SPWM wave passes through bipolar
Property sinusoidal pulse width modulation generate.
7. the single-phase Sinusoidal Inverter system adjusted as claimed in claim 6 based on feed forward approach, characterized in that accessory power supply
Module includes+3.3V and+9V accessory power supply, is all made of Buck type decompression chip TPS5430；+ 9V accessory power supply is the drive of each half-bridge
Dynamic chip UCC27211 power supply ,+3.3V accessory power supply are
MSP430F6638 super low power consuming single chip processor, high-precision current analysis monitoring chip INA282 and 16 digital-to-analogue conversion cores
Piece ADS1118 power supply.
8. the single-phase Sinusoidal Inverter system adjusted as claimed in claim 7 based on feed forward approach, characterized in that overcurrent protection
Module includes transistor drive circuit and relay；Overcurrent protection module is realized by control+9V accessory power supply to inverter circuit
Module overcurrent protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821950860.1U CN209030117U (en) | 2018-11-23 | 2018-11-23 | A kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821950860.1U CN209030117U (en) | 2018-11-23 | 2018-11-23 | A kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach |
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| Publication Number | Publication Date |
|---|---|
| CN209030117U true CN209030117U (en) | 2019-06-25 |
Family
ID=66910751
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821950860.1U Expired - Fee Related CN209030117U (en) | 2018-11-23 | 2018-11-23 | A kind of single-phase Sinusoidal Inverter system adjusted based on feed forward approach |
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| CN (1) | CN209030117U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116048156A (en) * | 2023-01-10 | 2023-05-02 | 江苏三联生物工程股份有限公司 | Bidirectional temperature control system of electrochemiluminescence detection device |
-
2018
- 2018-11-23 CN CN201821950860.1U patent/CN209030117U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116048156A (en) * | 2023-01-10 | 2023-05-02 | 江苏三联生物工程股份有限公司 | Bidirectional temperature control system of electrochemiluminescence detection device |
| CN116048156B (en) * | 2023-01-10 | 2024-01-30 | 江苏三联生物工程股份有限公司 | Bidirectional temperature control system of electrochemiluminescence detection device |
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