CN106130395A - A kind of pure sine wave inverter with filtering signal isolation features - Google Patents
A kind of pure sine wave inverter with filtering signal isolation features Download PDFInfo
- Publication number
- CN106130395A CN106130395A CN201610516714.7A CN201610516714A CN106130395A CN 106130395 A CN106130395 A CN 106130395A CN 201610516714 A CN201610516714 A CN 201610516714A CN 106130395 A CN106130395 A CN 106130395A
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- resistance
- module
- diode
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 64
- 238000002955 isolation Methods 0.000 title claims abstract description 43
- 230000005611 electricity Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 230000005622 photoelectricity Effects 0.000 claims description 2
- 238000005070 sampling Methods 0.000 abstract description 20
- 238000004891 communication Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 3
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000686 essence Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
Abstract
The invention discloses a kind of pure sine wave inverter with filtering signal isolation features, drive module, LC filtration module, sine-wave generator, MCU and voltage sample module including Power Entry Module, input isolation module, PWM module, Transformer Rectifier filtration module, SPWM；Voltage sample module includes voltage comparator circuit and photoelectrical coupler, and voltage comparator circuit includes that voltage comparator, the first resistance are to the 7th resistance, the first electric capacity, the second electric capacity and the first stabilivolt；LC filtration module includes that the 31st electric capacity is to the 43rd electric capacity, the 31st inductance to the 34th inductance, the 31st resistance to the 33rd resistance, the 31st diode to the 34th diode, adapter and active filter.The present invention be avoided that signal disturbing, ensure instrument gather data accurately, can carry out being effectively isolated, improving sampling precision, the long-range wire communication being used under complex environment by control signal and voltage sampling signal.
Description
Technical field
The present invention relates to inverter field, particularly to a kind of pure sine wave inversion with filtering signal 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.
LC filtration module is the important component part in inverter, and it utilizes inductance, electric capacity and resistance to combine, and can filter
Except certain once or multiple harmonic, reactive-load compensation and voltage regulation function are had concurrently.When existing LC filtration module cannot be used for complex environment
Under long-range wire communication.
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 control signal and voltage sampling signal being effectively isolated, improving essence of sampling
Degree, the pure sine wave inverter with filtering signal isolation features of the long-range wire communication being used under complex environment.
The technical solution adopted for the present invention to solve the technical problems is: constructs and a kind of has filtering signal 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, the second electric capacity and the first stabilivolt, described voltage
The in-phase input end of comparator is connected with one end of described first resistance and one end of the second resistance respectively by described 5th resistance
Connecing, the other end of described first resistance is connected with the cathode output end of described rectification circuit, described voltage comparator anti-phase defeated
Enter end by described 6th resistance respectively with one end of one end, one end of the 4th resistance and first electric capacity of described 3rd resistance even
Connecing, the other end of described 3rd resistance 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, and a pin of described voltage comparator is respectively
It is connected with one end of described first voltage source and the second electric capacity, the other end of described second electric capacity and the negative pole of described rectification circuit
Outfan connects, the outfan of described voltage comparator by described 7th resistance respectively with the negative electrode of described first stabilivolt and
In photoelectrical coupler, the anode of light emitting diode connects, and the anode of described first stabilivolt exports with the negative pole of described rectification circuit
End connects, and in described photoelectrical coupler, the colelctor electrode of phototriode is connected with described voltage conversion circuit；
Described LC filtration module includes the 31st electric capacity, the 32nd electric capacity, the 33rd electric capacity, the 34th electricity
Appearance, the 35th electric capacity, the 36th electric capacity, the 37th electric capacity, the 38th electric capacity, the 39th electric capacity, the 40th electricity
Appearance, the 41st electric capacity, the 42nd electric capacity, the 43rd electric capacity, the 31st inductance, the 32nd inductance, the 33rd
Inductance, the 34th inductance, the 31st resistance, the 32nd resistance, the 33rd resistance, the 31st diode, the 3rd
12 diodes, the 33rd diode, the 34th diode, adapter and active filter, described 31st electric capacity,
32nd electric capacity, the 33rd electric capacity and the 34th electric capacity are in parallel, described 31st electric capacity, the 32nd electric capacity, the
33 electric capacity and the 34th electric capacity one end in parallel is connected with described adapter, and the other end of parallel connection passes sequentially through described the
31 inductance and the 31st resistance are connected with one end of described 32nd inductance, the other end of described 32nd inductance
Ground connection；Described 35th electric capacity, the 36th electric capacity and the 37th electric capacity are in parallel, described 35th electric capacity, the 30th
Six electric capacity and the 37th electric capacity one end in parallel respectively with one end and the one of the 33rd inductance of described 32nd inductance
End connects, other end ground connection in parallel；Described 38th electric capacity, the 39th electric capacity and the 40th electric capacity are in parallel, and described the
One end of 38 electric capacity, the 39th electric capacity and the parallel connection of the 40th electric capacity is connected with the other end of described 33rd inductance,
The other end in parallel is connected with one end and the active filter of described 34th inductance respectively, described 34th inductance another
One end ground connection；Described 41st electric capacity, the 42nd electric capacity and the 43rd electric capacity are in parallel, described 41st electric capacity, the
One end of 42 electric capacity and the parallel connection of the 43rd electric capacity is connected with one end of described 34th inductance, another termination in parallel
Ground；One end of described 32nd resistance is connected with one end of described 34th inductance, another of described 32nd resistance
End is respectively with the anode of one end, the negative electrode of the 31st diode and the 33rd diode of described 33rd resistance even
Connect, the other end ground connection of described 33rd resistance, the anode of described 31st diode and described 32nd diode
Negative electrode connect, the plus earth of described 32nd diode, the negative electrode and the described 30th of described 33rd diode
The anode of four diodes connects, the minus earth of described 34th diode.
In the pure sine wave inverter with filtering signal 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 filtering signal 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 filtering signal 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 filtering signal isolation features of the present invention, described voltage sample module
Also including the second stabilivolt, the negative electrode of described second stabilivolt connects described voltage output end, the anode of described second stabilivolt
Ground connection.
In the pure sine wave inverter with filtering signal 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 filtering signal 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 filtering signal 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 filtering signal 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 control signal and voltage sampling signal being effectively isolated, improve sampling precision, can be used for
Long-range wire communication under complex environment.
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 filtering signal isolation features
Figure；
Fig. 2 is the circuit theory diagrams of voltage sample module in described embodiment；
Fig. 3 is the circuit theory diagrams of LC wave filter 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 filtering signal isolation features, this have filtering signal every
From function pure sine wave inverter structural representation as shown in Figure 1.In Fig. 1, this has the pure of filtering signal 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 used for carrying out harmonic compensation.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, the second electric capacity C2 and the first stabilivolt ZD1, voltage comparator
The in-phase input end of U2 is connected with one end of the first resistance R1 and one end of the second resistance R2 respectively by the 5th resistance R5, and the 5th
Resistance R5 for carrying out current limliting to the in-phase input end of voltage comparator U2, and the other end of the first resistance R1 is with rectification circuit just
Pole outfan connects, the inverting input of voltage comparator U2 by the 6th resistance R6 respectively with one end of the 3rd resistance R3, the
One end of four resistance R4 and one end of the first electric capacity C1 connect, and the 6th resistance R6 is for the inverting input to voltage comparator U2
Carry out current limliting, the other end of the 3rd resistance R3 connects the first voltage source VDD1, the other end of the second resistance R2, the 4th resistance R4
The other end of the other end and the first electric capacity C1 is all connected with the cathode output end of rectification circuit, a pin of voltage comparator U2
One end with the first voltage source VDD1 and the second electric capacity C2 is connected respectively, the other end of the second electric capacity C2 and the negative pole of rectification circuit
Outfan connects, the outfan of voltage comparator U2 by the 7th resistance R7 respectively with negative electrode and the photoelectricity of the first stabilivolt ZD1
In bonder U1, the anode of light emitting diode connects, and the 7th resistance R7 is used for the outfan of voltage comparator U2 is carried out current limliting,
The anode of the first stabilivolt ZD1 is connected with the cathode output end of rectification circuit, and the first stabilivolt ZD1 is for voltage comparator U2
The voltage signal of outfan output carry out voltage stabilizing, the colelctor electrode of phototriode and voltage conversion circuit in photoelectrical coupler U1
Connect.By using photoelectrical coupler U1 to isolate, control signal effectively can be isolated with sampled signal, effectively
Avoiding 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 the second stabilivolt ZD2, is equivalent to the outfan second stabilivolt ZD2 in parallel at smoothed filter circuit, second
The negative electrode of stabilivolt ZD2 connects voltage output end Vo, the plus earth of the second stabilivolt ZD2.By the voltage of smoothed filter circuit
Output end vo is connected with an input of MCU8, makes smoothed filtered voltage sampling signal deliver to MCU8 process,
MCU8 just can protect electric equipment according to the obtained corresponding instruction of sampled signal output 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 filtering signal 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 filtering signal 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 filtering signal 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 filtering signal isolation features finally obtain can meet needs.
Fig. 3 is the circuit theory diagrams of LC filtration module in the present embodiment.In Fig. 3, LC filtration module 6 includes the 31st electricity
Hold C31, the 32nd electric capacity C32, the 33rd electric capacity C33, the 34th electric capacity C34, the 35th electric capacity C35, the 30th
Six electric capacity C36, the 37th electric capacity C37, the 38th electric capacity C38, the 39th electric capacity C39, the 40th electric capacity C40, the 4th
11 electric capacity C41, the 42nd electric capacity C42, the 43rd electric capacity C43, the 31st inductance L31, the 32nd inductance L32,
33rd inductance L33, the 34th inductance L34, the 31st resistance R31, the 32nd resistance R32, the 33rd resistance
R33, the 31st diode V31, the 32nd diode V32, the 33rd diode V33, the 34th diode V34,
Adapter and active filter (not shown).
Wherein, the 31st electric capacity C31, the 32nd electric capacity C32, the 33rd electric capacity C33 and the 34th electric capacity C34
Parallel connection, the 31st electric capacity C31, the 32nd electric capacity C32, the 33rd electric capacity C33 and the one of the 34th electric capacity C34 parallel connection
End is connected with adapter, and the other end in parallel passes sequentially through the 31st inductance L31 and the 31st resistance R31 and the 32nd
One end of inductance L32 connects, the other end ground connection of the 32nd inductance L32.It is noted that the 31st resistance R3 is limited
Leakage resistance, so can carry out overcurrent protection.
In the present embodiment, the 35th electric capacity C35, the 36th electric capacity C36 and the 37th electric capacity C37 are in parallel, and the 3rd
One end of 15 electric capacity C35, the 36th electric capacity C36 and the 37th electric capacity C37 parallel connection is respectively with the 32nd inductance L32's
One end of one end and the 33rd inductance L33 connects, other end ground connection in parallel.
In the present embodiment, the 38th electric capacity C38, the 39th electric capacity C39 and the 40th electric capacity C40 are in parallel, and the 30th
One end of eight electric capacity C38, the 39th electric capacity C39 and the 40th electric capacity C40 parallel connection is with the other end of the 33rd inductance L33 even
Connecing, the other end in parallel is connected with one end and the active filter of the 34th inductance L34 respectively, the 34th inductance L34's
Other end ground connection.
In the present embodiment, the 41st electric capacity C41, the 42nd electric capacity C42 and the 43rd electric capacity C43 are in parallel, and the 4th
One end of 11 electric capacity C41, the 42nd electric capacity C42 and the 43rd electric capacity C43 parallel connection and one end of the 34th inductance L34
Connect, other end ground connection in parallel.
In the present embodiment, one end of the 32nd resistance R32 is connected with one end of the 34th inductance L34, and the 32nd
The other end of resistance R32 respectively with one end, the negative electrode and the 33rd of the 31st diode V31 of the 33rd resistance R33
The anode of diode V33 connects, the other end ground connection of the 33rd resistance R33, the anode and the 3rd of the 31st diode V31
The negative electrode of 12 diode V32 connects, the plus earth of the 32nd diode V32, the negative electrode of the 33rd diode V33 with
The anode of the 34th diode V34 connects, the minus earth of the 34th diode V34.It is noted that the present embodiment
In, the 32nd resistance R32 is current-limiting resistance, so can be carried out overcurrent protection.
Concrete, in the present embodiment, the 31st electric capacity C31, the 32nd electric capacity C32, the 33rd electric capacity C33 and the
34 electric capacity C34 and the 31st inductance L31 form the first series resonant circuit, the 38th electric capacity C38, the 39th electricity
Hold C39, the 40th electric capacity C40 and the 33rd inductance L33 and form the second series resonant circuit, the 35th electric capacity C35, the 3rd
16 electric capacity C36 and the 37th electric capacity C37 and the 32nd inductance L32 form the first antiresonant circuit, the 41st electricity
Hold C41, the 42nd electric capacity C42 and the 43rd electric capacity C43 and the 34th inductance L34 and form the second antiresonant circuit,
The signal being extracted is through by resonance circuit the first series resonant circuit, the second series resonant circuit, the first antiresonant circuit
With second antiresonant circuit composition bank of filters time, produce resonance, make useful signal pass through, mask useless letter
Number, the 33rd resistance R33 is resonance build-out resistor, the 31st diode V31, the 32nd diode V32, the 33rd
Diode V33, the 34th diode V34 constitute amplitude limiter, signal maximum amplitude limit is one and specifies numerical value, such as:
1.5V, thus have compressed working range, be conducive to improving the property of this pure sine wave inverter with filtering input isolation features
Energy.The present invention can under the adverse circumstances such as high temperature, high humidity, high salt fog reliably working, antidetonation, anti-electromagnetic interference capability are strong, receive
Highly sensitive.
In a word, in the present embodiment, this pure sine wave inverter with filtering signal 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 filtering signal 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, the second electric capacity and the first stabilivolt, described voltage ratio is relatively
The in-phase input end of device is connected with one end of described first resistance and one end of the second resistance respectively by described 5th resistance, institute
The cathode output end of the other end and described rectification circuit of stating the first resistance is connected, and the inverting input of described voltage comparator leads to
Cross described 6th resistance one end respectively with one end, one end of the 4th resistance and first electric capacity of described 3rd resistance to be connected, institute
The other end stating the 3rd resistance connects the first voltage source, the other end of described second resistance, the other end and first of the 4th resistance
The other end of electric capacity all cathode output ends with described rectification circuit are connected, a pin of described voltage comparator respectively with institute
The one end stating the first voltage source and the second electric capacity connects, and the other end of described second electric capacity exports with the negative pole of described rectification circuit
End connects, the outfan of described voltage comparator by described 7th resistance respectively with negative electrode and the photoelectricity of described first stabilivolt
In bonder, the anode of light emitting diode connects, and the anode of described first stabilivolt connects with the cathode output end of described rectification circuit
Connecing, in described photoelectrical coupler, the colelctor electrode of phototriode is connected with described voltage conversion circuit；
Described LC filtration module include the 31st electric capacity, the 32nd electric capacity, the 33rd electric capacity, the 34th electric capacity,
35 electric capacity, the 36th electric capacity, the 37th electric capacity, the 38th electric capacity, the 39th electric capacity, the 40th electric capacity,
41 electric capacity, the 42nd electric capacity, the 43rd electric capacity, the 31st inductance, the 32nd inductance, the 33rd inductance,
34th inductance, the 31st resistance, the 32nd resistance, the 33rd resistance, the 31st diode, the 32nd
Pole pipe, the 33rd diode, the 34th diode, adapter and active filter, described 31st electric capacity, the 30th
Two electric capacity, the 33rd electric capacity and the 34th electric capacity are in parallel, described 31st electric capacity, the 32nd electric capacity, the 33rd
One end of electric capacity and the parallel connection of the 34th electric capacity is connected with described adapter, and the other end in parallel passes sequentially through the described 31st
Inductance and the 31st resistance are connected with one end of described 32nd inductance, the other end ground connection of described 32nd inductance；
Described 35th electric capacity, the 36th electric capacity and the 37th electric capacity are in parallel, described 35th electric capacity, the 36th electric capacity
One end in parallel with the 37th electric capacity is connected with described one end of 32nd inductance and one end of the 33rd inductance respectively,
Other end ground connection in parallel；Described 38th electric capacity, the 39th electric capacity and the 40th electric capacity are in parallel, described 38th electricity
One end of appearance, the 39th electric capacity and the parallel connection of the 40th electric capacity is connected with the other end of described 33rd inductance, and in parallel is another
One end is connected with one end and the active filter of described 34th inductance respectively, another termination of described 34th inductance
Ground；Described 41st electric capacity, the 42nd electric capacity and the 43rd electric capacity are in parallel, described 41st electric capacity, the 42nd
One end of electric capacity and the parallel connection of the 43rd electric capacity is connected with one end of described 34th inductance, other end ground connection in parallel；Institute
One end of one end and described 34th inductance of stating the 32nd resistance is connected, and the other end of described 32nd resistance is respectively
It is connected with the anode of one end, the negative electrode of the 31st diode and the 33rd diode of described 33rd resistance, described
The other end ground connection of the 33rd resistance, the anode of described 31st diode connects with the negative electrode of described 32nd diode
Connect, the plus earth of described 32nd diode, the negative electrode of described 33rd diode and described 34th diode
Anode connect, the minus earth of described 34th diode.
The pure sine wave inverter with filtering signal 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 filtering signal 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 filtering signal 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 filtering signal isolation features the most according to claim 4, it is characterised in that described
Voltage sample module also includes the second stabilivolt, the negative electrode described voltage output end of connection of described second stabilivolt, described second
The plus earth of stabilivolt.
6., according to the pure sine wave inverter with filtering signal 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 filtering signal 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 filtering signal 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610516714.7A CN106130395A (en) | 2016-07-04 | 2016-07-04 | A kind of pure sine wave inverter with filtering signal isolation features |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610516714.7A CN106130395A (en) | 2016-07-04 | 2016-07-04 | A kind of pure sine wave inverter with filtering signal isolation features |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106130395A true CN106130395A (en) | 2016-11-16 |
Family
ID=57469102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610516714.7A Pending CN106130395A (en) | 2016-07-04 | 2016-07-04 | A kind of pure sine wave inverter with filtering signal isolation features |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106130395A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446881A (en) * | 2020-05-22 | 2020-07-24 | 湖南大学 | Inverter, inverter circuit and construction method thereof |
Citations (4)
| 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 |
| CN202333771U (en) * | 2011-10-14 | 2012-07-11 | 中联重科股份有限公司 | Power supply protection circuit and engineering machinery |
| CN102628889A (en) * | 2012-04-17 | 2012-08-08 | 东莞市精诚电能设备有限公司 | Voltage sampling circuit |
| CN203206186U (en) * | 2013-03-28 | 2013-09-18 | 北京长城电子装备有限责任公司 | LC filter for boat |
-
2016
- 2016-07-04 CN CN201610516714.7A patent/CN106130395A/en active Pending
Patent Citations (4)
| 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 |
| CN202333771U (en) * | 2011-10-14 | 2012-07-11 | 中联重科股份有限公司 | Power supply protection circuit and engineering machinery |
| CN102628889A (en) * | 2012-04-17 | 2012-08-08 | 东莞市精诚电能设备有限公司 | Voltage sampling circuit |
| CN203206186U (en) * | 2013-03-28 | 2013-09-18 | 北京长城电子装备有限责任公司 | LC filter for boat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446881A (en) * | 2020-05-22 | 2020-07-24 | 湖南大学 | Inverter, inverter circuit and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106443358B (en) | Overhead power distribution network traveling wave positioning system based on signal injection device | |
| CN204425298U (en) | A kind of faint AC signal amplitude lock-in amplifier | |
| CN106130395A (en) | A kind of pure sine wave inverter with filtering signal isolation features | |
| CN106059374A (en) | Pure sine wave inverter with voltage sampling isolation function | |
| CN106160554A (en) | A kind of pure sine wave inverter with filtering input isolation features | |
| CN106130397A (en) | A kind of pure sine wave inverter with filtering voltage regulation isolation features | |
| CN109581043A (en) | A kind of high direct voltage signal acquisition circuit | |
| CN108020806B (en) | Harmonic generator for intelligent electric energy meter detection | |
| CN106059370A (en) | Pure sine wave inverter with pulse width modulation, voltage stabilization and isolation functions | |
| CN106100420A (en) | A kind of pure sine wave inverter with signal isolation features | |
| CN106160552A (en) | A kind of pure sine wave inverter with current sample input isolation features | |
| CN106100418A (en) | A kind of pure sine wave inverter with filtering PWM voltage stabilizing isolation features | |
| CN106100428A (en) | A kind of pure sine wave inverter with filtering voltage sampling isolation features | |
| CN106160558A (en) | A kind of pure sine wave inverter with high frequency chopping signal isolation features | |
| CN106100423A (en) | A kind of pure sine wave inverter with filtered circuit sampling voltage stabilizing isolation features | |
| CN106160557A (en) | A kind of pure sine wave inverter with filtered circuit sampling isolation features | |
| CN106100417A (en) | A kind of pure sine wave inverter with filtering many current signals isolation features | |
| CN106059373A (en) | Pure sine wave inverter with filtering current sampling input isolating function | |
| CN106100429A (en) | A kind of pure sine wave inverter with current sample isolation features | |
| CN106160555A (en) | A kind of pure sine wave inverter with filtering pwm signal isolation features | |
| CN106059368A (en) | Pure-sine-wave inverter having filter PWM input isolation function | |
| CN106160556A (en) | A kind of pure sine wave inverter with voltage stabilizing isolation features | |
| CN106100422A (en) | A kind of pure sine wave inverter with filtering PWM voltage sample isolation features | |
| CN106160559A (en) | There is the pure sine wave inverter of high frequency chopping current sample input isolation features | |
| CN106100415A (en) | A kind of pure sine wave inverter with input isolation features |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161116 |
|
| RJ01 | Rejection of invention patent application after publication |