CN106059374A - Pure sine wave inverter with voltage sampling isolation function - Google Patents
Pure sine wave inverter with voltage sampling isolation function Download PDFInfo
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- CN106059374A CN106059374A CN201610516908.7A CN201610516908A CN106059374A CN 106059374 A CN106059374 A CN 106059374A CN 201610516908 A CN201610516908 A CN 201610516908A CN 106059374 A CN106059374 A CN 106059374A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a pure sine wave inverter with a voltage sampling isolation function. The pure sine wave inverter comprises the components of a power input module, an input isolation module, a PWM modulation module, a transformation/rectification/filtering module, an SPWM driving module, an LC filtering module, a sine wave generator, an MCU and a voltage sampling module. The input end of the input isolation module is connected with one output end of the power input module. The output end of the input isolation module is connected with the input end of the PWM modulation module. One input end of the SPWM driving module is connected with the output end of the transformation/rectification/filtering module. The input end of the LC filtering module is connected with the output end of the SPWM driving module. The voltage sampling module comprises a rectifying circuit, a voltage comparing circuit, a photoelectric coupler, a voltage converting circuit and a smoothing filter circuit, wherein the rectifying circuit, the voltage comparing circuit, the photoelectric coupler, the voltage converting circuit and the smoothing filter circuit are successively connected. The pure sine wave inverter has advantages of preventing signal interference, ensuring high accuracy of data acquired by the instrument, effectively isolating a control signal from a voltage sampling signal, and improving sampling precision.
Description
Technical field
The present invention relates to inverter field, particularly to a kind of pure sine wave inversion with voltage sample isolation features
Device.
Background technology
Inverter is a kind of device that unidirectional current is converted to alternating current, at present, and a kind of modified sine wave inversion of use
Device, is connected and composed by low-voltage driving control circuit, pulse width modulation output driving circuit and protection circuit for input and output, but
The waveform that the modified sine wave inverter of this structure produces is when using precision instrument, owing to not isolating, and signal disturbing
Relatively big, cause collection data inaccurate, especially at some armarium, on military equipment, the requirement for elaboration is higher,
Also serious consequence can be produced even if somewhat disturbing.
It addition, in the circuit board of electric equipment, cause the infringement to electrical equipment to prevent the larger fluctuation of line voltage,
One voltage sampling circuit would generally be set, and the signal that voltage sampling circuit is obtained is delivered to single-chip microcomputer and processed, and works as inspection
When measuring line voltage more than some numerical value or less than a certain numerical value, the control circuit that single-chip microcomputer is relevant will control electrical equipment and stop
Only work, in order to avoid causing damage to it.As the voltage sampling circuit in electromagnetic oven send the signal obtaining line voltage sampling
Processing to single-chip microcomputer, when electromagnetic oven works, the change of single-chip microcomputer moment detection voltage sampling signal, when line voltage is big
During in 260 volts or less than 160 volts, single-chip microcomputer can export relevant protection instruction, make electromagnetic oven stop heating；Single-chip microcomputer works
Time, also can automatically adjust pwm signal according to the change of voltage signal, make electromagnetic oven do firm power and process.
But, in existing voltage sampling circuit, generally use voltage formula to sample, the variable to required sampling
Directly sample, Single-chip Controlling signal is not effectively isolated with voltage sampling signal, thus affect control
, there is the problem that sampling error is bigger in precision.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that one is avoided that signal
Disturb, ensure that instrument collection data are accurate, can carry out being effectively isolated, improving sampling precision by control signal and voltage sampling signal
The pure sine wave inverter with voltage sample isolation features.
The technical solution adopted for the present invention to solve the technical problems is: constructs and a kind of has voltage sample isolation features
Pure sine wave inverter, including Power Entry Module, input isolation module, PWM module, Transformer Rectifier filtration module,
SPWM drives module, LC filtration module, sine-wave generator, MCU and voltage sample module, the input of described input isolation module
End is connected with an outfan of described Power Entry Module, the outfan of described input isolation module and described PWM module
Input connect, the input of described Transformer Rectifier filtration module is connected with the outfan of described PWM module, described
SPWM drives an input of module to be connected with the outfan of described Transformer Rectifier filtration module, the input of described LC filtration module
Holding and drive the outfan of module to be connected with described SPWM, the input of described sine-wave generator is defeated with described LC filtration module
Going out end to connect, the input of described voltage sample module is connected with another outfan of described Power Entry Module, described MCU's
One input is connected with the outfan of described voltage sample module；
Described voltage sample module includes that the rectification circuit being sequentially connected with, voltage comparator circuit, photoelectrical coupler, voltage turn
Change circuit and smoothed filter circuit；Described voltage comparator circuit includes voltage comparator, the first resistance, the second resistance, the 3rd electricity
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity and the second electric capacity, described voltage comparator same
Phase input is connected with one end of described first resistance and one end of the second resistance respectively by described 5th resistance, and described first
The other end of resistance is connected with the cathode output end of described rectification circuit, and the inverting input of described voltage comparator is by described
6th resistance one end with one end, one end of the 4th resistance and first electric capacity of described 3rd resistance respectively is connected, and the described 3rd
The other end of resistance connects the first voltage source, the other end of described second resistance, the other end of the 4th resistance and the first electric capacity
The other end all cathode output ends with described rectification circuit are connected, and a pin of described voltage comparator is respectively with described first
One end of voltage source and the second electric capacity connects, and the other end of described second electric capacity connects with the cathode output end of described rectification circuit
Connecing, the outfan of described voltage comparator is by described 7th resistance with the anode of light emitting diode in described photoelectrical coupler even
Connecing, in described photoelectrical coupler, the colelctor electrode of phototriode is connected with described voltage conversion circuit.
In the pure sine wave inverter with voltage sample isolation features of the present invention, described voltage sample module
Also including the 8th resistance, the outfan of described voltage comparator connects also by one end of described 7th resistance with described 8th resistance
Connecing, the other end of described 8th resistance is connected with described first voltage source.
In the pure sine wave inverter with voltage sample isolation features of the present invention, described voltage conversion circuit
Including audion, the 9th resistance and the tenth resistance, the base stage of described audion and phototriode in described photoelectrical coupler
Colelctor electrode connects, and the base stage of described audion connects the second voltage source, the current collection of described audion also by described 9th resistance
Pole connects described second voltage source, the grounded emitter of described audion by described tenth resistance.
In the pure sine wave inverter with voltage sample isolation features of the present invention, described smoothed filter circuit
Including the 11st resistance, the 12nd resistance, the 13rd resistance, the 3rd electric capacity and the 4th electric capacity；One end of described 11st resistance
Be connected with the colelctor electrode of described audion, the other end of described 11st resistance respectively with one end and of described 12nd resistance
One end of three electric capacity connects, and one end of the other end, one end of the 13rd resistance and the 4th electric capacity of described 12nd resistance all connects
Connect voltage output end, the other end, the other end of the 13rd resistance and the equal ground connection of the other end of the 4th electric capacity of described 3rd electric capacity.
In the pure sine wave inverter with voltage sample isolation features of the present invention, described voltage sample module
Also including stabilivolt, the negative electrode of described stabilivolt connects described voltage output end, the plus earth of described stabilivolt.
In the pure sine wave inverter with voltage sample isolation features of the present invention, also include current sample mould
Block and display module, the input of described current sample module is connected with another outfan of described PWM module, described electricity
The outfan of stream sampling module is connected with another input of described MCU, and the outfan of described MCU is defeated with described display module
Enter end to connect.
In the pure sine wave inverter with voltage sample isolation features of the present invention, also include that output voltage is examined
Surveying module, an input of described output voltage detection module drives another outfan of module to be connected with described SPWM, described
Another input of output voltage detection module is connected with the outfan of described sine-wave generator.
In the pure sine wave inverter with voltage sample isolation features of the present invention, described rectification circuit includes
First diode, the second diode, the 3rd diode and the 4th diode, the anode of described first diode and the 4th diode
Negative electrode be all connected with the live wire of alternating current, the anode of described second diode and the negative electrode of the 3rd diode all with alternating current
Zero line connects, and the negative electrode of described first diode and the negative electrode of the second diode are defeated as the positive pole of described rectification circuit after connecting
Going out end, after the anode of described 3rd diode and the anode connection of the 4th diode, the negative pole as described rectification circuit exports
End.
Implement the present invention the pure sine wave inverter with voltage sample isolation features, have the advantages that by
Module, LC is driven in using Power Entry Module, input isolation module, PWM module, Transformer Rectifier filtration module, SPWM
Filtration module, sine-wave generator, MCU and voltage sample module, voltage sample module includes rectification circuit, the electricity being sequentially connected with
Pressure comparison circuit, photoelectrical coupler, voltage conversion circuit and smoothed filter circuit, input isolation module power supply can be inputted into
Row is effectively isolated, and SPWM changes modulation pulse mode exactly on the basis of PWM, and pulse width time dutycycle presses sine gauge
Rate arranges, and such output waveform can accomplish sinewave output through suitable filtering, and LC filtration module is used for harmonic compensation,
Use photoelectrical coupler MCU control signal effectively to be isolated with voltage sampling signal, be avoided that signal disturbing, guarantor
Card instrument gather data accurately, can carry out being effectively isolated, improving sampling precision by control signal and voltage sampling signal.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation that the present invention has in one embodiment of pure sine wave inverter of voltage sample isolation features
Figure；
Fig. 2 is the circuit theory diagrams of voltage sample module in described embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
In the present invention has the pure sine wave inverter embodiment of voltage sample isolation features, this have voltage sample every
From function pure sine wave inverter structural representation as shown in Figure 1.In Fig. 1, this has the pure of voltage sample isolation features
Sinewave inverter include Power Entry Module 1, input isolation module 2, PWM module 3, Transformer Rectifier filtration module 4,
SPWM drives module 5, LC filtration module 6, sine-wave generator 7, MCU8 and voltage sample module 9, wherein, inputs isolation module
The input of 2 is connected with an outfan of Power Entry Module 1, the outfan of input isolation module 2 and PWM module 3
Input connects, and the input of Transformer Rectifier filtration module 4 is connected with the outfan of PWM module 3, and SPWM drives module 5
An input be connected with the outfan of Transformer Rectifier filtration module 4, the input of LC filtration module 6 and SPWM drive module 5
Outfan connect, the input of sine-wave generator 7 is connected with the outfan of LC filtration module 6, voltage sample module 9 defeated
Entering end to be connected with another outfan of Power Entry Module 1, an input of MCU8 connects with the outfan of voltage sample module 9
Connect.The benefit using MCU8 is simple, cheap.
It is noted that SPWM changes modulation pulse mode, pulse width time duty exactly on the basis of PWM
Arranging than by sine gauge rate, such output waveform can accomplish sinewave output through suitable filtering, and wherein PWM is exactly pulse
Width modulated.LC filtration module 6 in the present embodiment is to be formed by combining by inductance, electric capacity and resistance, is used for carrying out harmonic wave benefit
Repay.Thus can produce pure sine wave, be avoided that the interference of signal, it is ensured that instrument gathers the accuracy of data.
Fig. 2 is the circuit theory diagrams of voltage sample module in the present embodiment.In the present embodiment, voltage sample module 9 includes
Rectification circuit, voltage comparator circuit, photoelectrical coupler U1, voltage conversion circuit and the smoothed filter circuit being sequentially connected with；Wherein,
Voltage comparator circuit include voltage comparator U2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th
Resistance R5, the 6th resistance R6, the 7th resistance R7, the first electric capacity C1 and the second electric capacity C2, the in-phase input end of voltage comparator U2
Being connected with one end of the first resistance R1 and one end of the second resistance R2 respectively by the 5th resistance R5, the 5th resistance R5 is for electricity
The in-phase input end of pressure comparator U2 carries out current limliting, and the other end of the first resistance R1 is connected with the cathode output end of rectification circuit,
The inverting input of voltage comparator U2 by the 6th resistance R6 respectively with one end, one end of the 4th resistance R4 of the 3rd resistance R3
Connecting with one end of the first electric capacity C1, the 6th resistance is for carrying out current limliting to the inverting input of voltage comparator U2, and the 3rd is electric
The other end of resistance R3 connects the first voltage source VDD1, the other end of the second resistance R2, the other end of the 4th resistance R4 and the first electricity
Hold C1 the other end be all connected with the cathode output end of rectification circuit, a pin of voltage comparator U2 respectively with the first voltage
One end of source VDD1 and the second electric capacity C2 connects, and the other end of the second electric capacity C2 is connected with the cathode output end of rectification circuit, electricity
The outfan of pressure comparator U2 is connected by the anode of light emitting diode in the 7th resistance R7 and photoelectrical coupler U1, the 7th resistance
R7 is for carrying out current limliting to the outfan of voltage comparator U2, and in photoelectrical coupler U1, the colelctor electrode of phototriode turns with voltage
Change circuit to connect.By using photoelectrical coupler U1 to isolate, control signal and sampled signal can be carried out effectively every
From, effectively prevent the impact on control signal of the external voltage electrical network, its control accuracy is higher, and sampling error is less.
In the present embodiment, voltage sample module 9 also includes the 8th resistance R8, and the outfan of voltage comparator U2 is also by
One end of seven resistance R7 and the 8th resistance R8 connects, and the other end of the 8th resistance R8 and the first voltage source VDD1 connect.
In the present embodiment, voltage conversion circuit includes audion Q1, the 9th resistance R9 and the tenth resistance R10, audion Q1
Base stage be connected with the colelctor electrode of phototriode in photoelectrical coupler U1, the base stage of audion Q1 is also by the 9th resistance R9 even
Meeting the second voltage source VDD2, the colelctor electrode of audion Q1 connects the second voltage source VDD2 by the tenth resistance R10, audion Q1's
Grounded emitter, the negative pole of the i.e. second voltage source VDD2.
In the present embodiment, smoothed filter circuit include the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13,
3rd electric capacity C3 and the 4th electric capacity C4；Wherein, one end of the 11st resistance R11 is connected with the colelctor electrode of audion Q1, and the 11st
The other end of resistance R11 is connected with one end of the 12nd resistance R12 and one end of the 3rd electric capacity C3 respectively, the 12nd resistance R12
One end of the other end, one end of the 13rd resistance R13 and the 4th electric capacity C4 be all connected with voltage output end Vo, the 3rd electric capacity C3's
The other end, the other end of the 13rd resistance R13 and the equal ground connection of the other end of the 4th electric capacity C4.In order to protect MCU8, this voltage is adopted
Original mold block 9 also includes stabilivolt ZD1, is equivalent to the outfan stabilivolt ZD1 in parallel at smoothed filter circuit, stabilivolt
The negative electrode of ZD1 connects voltage output end Vo, the plus earth of stabilivolt ZD1.By the voltage output end Vo of smoothed filter circuit with
One input of MCU8 connects, and makes smoothed filtered voltage sampling signal deliver to MCU8 process, and MCU8 just can basis
The obtained corresponding instruction of sampled signal output, protects electric equipment effectively.
In the present embodiment, rectification circuit includes the first diode D1, the second diode D2, the 3rd diode D3 and the four or two
Pole pipe D4, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 form bridge rectifier,
The anode of the first diode D1 and the negative electrode of the 4th diode D4 are all connected with the live wire ACL of alternating current, the second diode D2's
The negative electrode of anode and the 3rd diode D3 is all connected with the zero line ACN of alternating current, the negative electrode of the first diode D1 and the two or two pole
As the cathode output end of rectification circuit, the anode of the 3rd diode D3 and the sun of the 4th diode D4 after the negative electrode connection of pipe D2
As the cathode output end of rectification circuit after the connection of pole.
In the present embodiment, when line voltage (such as 220V/50Hz) obtains the all-wave electricity of pulsation after rectifier circuit rectifies
Pressure signal, the first resistance R1 and the second resistance R2 carries out dividing potential drop to it, the voltage on the second resistance R2 as sampled voltage, the 4th
Voltage on resistance R4 is as reference voltage.The square-wave signal of the outfan output of voltage comparator U2 drives photoelectrical coupler U1
Work, in photoelectrical coupler U1, the signal of the colelctor electrode output of phototriode is through voltage conversion circuit and smoothed filter circuit
The disposal of gentle filter after, the direct current signal obtained is input to MCU8 process.When line voltage changes, voltage ratio
The relatively output signal of the outfan of device U2 also changes, and correspondingly, obtain after voltage conversion and the disposal of gentle filter is straight
Stream signal changes the most therewith, and MCU8 just can protect electricity according to the obtained corresponding instruction of voltage sampling signal output effectively
Device equipment.
In the present embodiment, this pure sine wave inverter with voltage sample isolation features also includes current sample module 10
With display module 11, the input of current sample module 10 is connected with another outfan of PWM module 3, current sample mould
The outfan of block 10 is connected with another input of MCU8, and the outfan of MCU8 is connected with the input of display module 11.Pass through
Display module 11 can find out voltage and power intuitively.
Concrete, in the present embodiment, gather the input voltage of Power Entry Module 1 through voltage sample module 9, then through MCU8
Control display module 11 and demonstrate magnitude of voltage；Display module 11 can also be used to show output, through current sample module 10
Electric current after acquisition pulse width modulated, then calculated power by MCU8, drive display module 11 to show power；MCU8 is all right
The duty being used for detecting each module is the most normal, when MCU8 detects the working state abnormal of certain module, permissible
Display module 11 is driven to show miscue.Have only to as required, it can be realized that the numerical value of input voltage, output
The duty of numerical value and this pure sine wave inverter with voltage sample isolation features is the most normal, can make work people
Whole system is had and to grasp well by member.
In the present embodiment, this pure sine wave inverter with voltage sample isolation features also includes that output voltage detects mould
Block 12, an input of output voltage detection module 12 drives another outfan of module 5 to be connected with SPWM, and output voltage detects
Another input of module 12 is connected with the outfan of sine-wave generator 7.In real time sine-wave generator 7 can be carried out voltage
Feedback, whether detection voltage meets needs, then regulates SPWM and drive module 5 to change pulse, reaches required voltage, namely
Say that the voltage allowing this pure sine wave inverter with voltage sample isolation features finally obtain can meet needs.
In a word, in the present embodiment, this pure sine wave inverter with voltage sample isolation features is used in medical treatment to set
Standby, time on military equipment, the interference of signal will not be produced, the accuracy of the data that instrument records also is greatly improved.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (8)
1. a pure sine wave inverter with voltage sample isolation features, it is characterised in that include Power Entry Module, defeated
Enter isolation module, PWM module, Transformer Rectifier filtration module, SPWM drive module, LC filtration module, sine-wave generator,
MCU and voltage sample module, the input of described input isolation module is connected with an outfan of described Power Entry Module, institute
The outfan stating input isolation module is connected with the input of described PWM module, described Transformer Rectifier filtration module defeated
Entering end to be connected with the outfan of described PWM module, described SPWM drives an input of module to filter with described Transformer Rectifier
The outfan of mode block connects, and the input of described LC filtration module drives the outfan of module to be connected with described SPWM, described
The input of sine-wave generator is connected with the outfan of described LC filtration module, the input of described voltage sample module and institute
Another outfan stating Power Entry Module connects, and an input of described MCU connects with the outfan of described voltage sample module
Connect；
Described voltage sample module includes that the rectification circuit being sequentially connected with, voltage comparator circuit, photoelectrical coupler, voltage change electricity
Road and smoothed filter circuit；Described voltage comparator circuit include voltage comparator, the first resistance, the second resistance, the 3rd resistance,
Four resistance, the 5th resistance, the 6th resistance, the 7th resistance, the first electric capacity and the second electric capacity, the homophase input of described voltage comparator
End is connected with one end of described first resistance and one end of the second resistance respectively by described 5th resistance, described first resistance
The other end is connected with the cathode output end of described rectification circuit, and the inverting input of described voltage comparator is by described 6th electricity
Resistance one end with one end, one end of the 4th resistance and first electric capacity of described 3rd resistance respectively is connected, described 3rd resistance
The other end connects the first voltage source, the other end of described second resistance, the other end of the 4th resistance and the other end of the first electric capacity
All cathode output ends with described rectification circuit are connected, a pin of described voltage comparator respectively with described first voltage source
Connecting with one end of the second electric capacity, the other end of described second electric capacity is connected with the cathode output end of described rectification circuit, described
The outfan of voltage comparator is connected with the anode of light emitting diode in described photoelectrical coupler by described 7th resistance, described
In photoelectrical coupler, the colelctor electrode of phototriode is connected with described voltage conversion circuit.
The pure sine wave inverter with voltage sample isolation features the most according to claim 1, it is characterised in that described
Voltage sample module also includes the 8th resistance, and the outfan of described voltage comparator is also by described 7th resistance and the described 8th
One end of resistance connects, and the other end of described 8th resistance is connected with described first voltage source.
The pure sine wave inverter with voltage sample isolation features the most according to claim 2, it is characterised in that described
Voltage conversion circuit includes in audion, the 9th resistance and the tenth resistance, the base stage of described audion and described photoelectrical coupler
The colelctor electrode of phototriode connects, and the base stage of described audion connects the second voltage source also by described 9th resistance, described
The colelctor electrode of audion connects described second voltage source, the grounded emitter of described audion by described tenth resistance.
The pure sine wave inverter with voltage sample isolation features the most according to claim 3, it is characterised in that described
Smoothed filter circuit includes the 11st resistance, the 12nd resistance, the 13rd resistance, the 3rd electric capacity and the 4th electric capacity；Described tenth
One end of one resistance is connected with the colelctor electrode of described audion, and the other end of described 11st resistance is electric with the described 12nd respectively
One end of resistance and one end of the 3rd electric capacity connect, the other end of described 12nd resistance, one end of the 13rd resistance and the 4th electricity
The one end held is all connected with voltage output end, the other end, the other end of the 13rd resistance and the 4th electric capacity of described 3rd electric capacity
The equal ground connection of the other end.
The pure sine wave inverter with voltage sample isolation features the most according to claim 4, it is characterised in that described
Voltage sample module also includes stabilivolt, and the negative electrode of described stabilivolt connects described voltage output end, the anode of described stabilivolt
Ground connection.
6., according to the pure sine wave inverter with voltage sample isolation features described in claim 1 to 5 any one, it is special
Levy and be, also include current sample module and display module, the input of described current sample module and described PWM module
Another outfan connect, the outfan of described current sample module is connected with another input of described MCU, described MCU's
Outfan is connected with the input of described display module.
The pure sine wave inverter with voltage sample isolation features the most according to claim 6, it is characterised in that also wrap
Including output voltage detection module, an input of described output voltage detection module and described SPWM drive another output of module
End connects, and another input of described output voltage detection module is connected with the outfan of described sine-wave generator.
The pure sine wave inverter with voltage sample isolation features the most according to claim 1, it is characterised in that described
Rectification circuit includes the first diode, the second diode, the 3rd diode and the 4th diode, the anode of described first diode
All it is connected with the live wire of alternating current with the negative electrode of the 4th diode, the anode of described second diode and the negative electrode of the 3rd diode
All it is connected with the zero line of alternating current, as described rectification after the negative electrode of described first diode and the negative electrode connection of the second diode
As described rectification circuit after the cathode output end of circuit, the anode of described 3rd diode and the anode connection of the 4th diode
Cathode output end.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994547A (en) * | 2017-12-08 | 2018-05-04 | 杭州可靠性仪器厂 | A kind of output current decision maker |
| CN111698817A (en) * | 2020-06-24 | 2020-09-22 | 广东爱奇光电科技有限公司 | Slow start driving circuit for LED |
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| CN201985775U (en) * | 2010-12-28 | 2011-09-21 | 温州市新焦点科技电子有限公司 | Pure sine wave inverter |
| CN102628889A (en) * | 2012-04-17 | 2012-08-08 | 东莞市精诚电能设备有限公司 | Voltage sampling circuit |
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2016
- 2016-07-04 CN CN201610516908.7A patent/CN106059374A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201985775U (en) * | 2010-12-28 | 2011-09-21 | 温州市新焦点科技电子有限公司 | Pure sine wave inverter |
| CN102628889A (en) * | 2012-04-17 | 2012-08-08 | 东莞市精诚电能设备有限公司 | Voltage sampling circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994547A (en) * | 2017-12-08 | 2018-05-04 | 杭州可靠性仪器厂 | A kind of output current decision maker |
| CN107994547B (en) * | 2017-12-08 | 2024-04-02 | 浙江杭可仪器有限公司 | Output current judging device |
| CN111698817A (en) * | 2020-06-24 | 2020-09-22 | 广东爱奇光电科技有限公司 | Slow start driving circuit for LED |
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Application publication date: 20161026 |