CN106100419A - A kind of pure sine wave inverter with high frequency chopping voltage stabilizing isolation features - Google Patents
A kind of pure sine wave inverter with high frequency chopping voltage stabilizing isolation features Download PDFInfo
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- CN106100419A CN106100419A CN201610513775.8A CN201610513775A CN106100419A CN 106100419 A CN106100419 A CN 106100419A CN 201610513775 A CN201610513775 A CN 201610513775A CN 106100419 A CN106100419 A CN 106100419A
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- 238000002955 isolation Methods 0.000 title claims abstract description 44
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 33
- 230000000903 blocking effect Effects 0.000 claims abstract description 40
- 238000001914 filtration Methods 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 5
- 230000005428 wave function Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method 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
- 230000008569 process Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
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- 238000000465 moulding Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/257—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with comparison of different reference values with the value of voltage or current, e.g. using step-by-step method
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of pure sine wave inverter with high frequency chopping voltage stabilizing 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；Sine-wave generator includes the first reverse blocking IGBT, the second reverse blocking IGBT, the 3rd continued flow tube, the 4th continued flow tube, the 16th resistance, the first inductance and the 6th filter capacitor；Voltage sample module includes voltage comparator circuit and photoelectrical coupler, and voltage comparator circuit includes voltage comparator, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the first stabilivolt.The present invention be avoided that signal disturbing, ensure instrument gather data accurately, improve service life, can alleviate weight, install more convenient, use extensively, can carry out being effectively isolated, improving sampling precision by control signal and voltage sampling signal.
Description
Technical field
The present invention relates to inverter field, inverse particularly to a kind of pure sine wave with high frequency chopping voltage stabilizing isolation features
Become 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.
The power-saving method of lighting electricity saving device mostly is controllable silicon cut mode in the market, or autotransformer mode is adjusted
Pressure.Using controllable silicon cut mode, its output voltage waveforms is discontinuous, destroys the integrity of sine wave, can produce bigger
Harmonic wave disturbs, and voltage rises and falls suddenly and produces dash current, for life-span of light fixture also can be certain impact.Autotransformer side
Formula is output as sine wave, but its volume is big, and weight is the most heavier, installs inconvenience, and range is limited.
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
Interference, ensure instrument gather data accurately, improve service life, can alleviate weight, install more convenient, use extensively, can be by
Control signal and voltage sampling signal carry out being effectively isolated, improve sampling precision there is the pure of high frequency chopping voltage stabilizing isolation features
Sinewave inverter.
The technical solution adopted for the present invention to solve the technical problems is: structure one has high frequency chopping voltage stabilizing isolation merit
The pure sine wave inverter of energy, including Power Entry Module, input isolation module, PWM module, Transformer Rectifier filtering mould
Block, SPWM drive module, LC filtration module, sine-wave generator, MCU and voltage sample module, described input isolation module
Input is connected with an outfan of described Power Entry Module, the outfan of described input isolation module and described PWM
The input of module connects, and the input of described Transformer Rectifier filtration module is connected with the outfan of described PWM module, institute
Stating SPWM drives an input of module to be connected with the outfan of described Transformer Rectifier filtration module, described LC filtration module defeated
Entering end drives the outfan of module to be connected with described SPWM, the input of described sine-wave generator and described LC filtration module
Outfan connects, and the input of described voltage sample module is connected with another outfan of described Power Entry Module, described MCU
An input be connected with the outfan of described voltage sample module；
Described sine-wave generator includes the first reverse blocking IGBT, the second reverse blocking IGBT, the 3rd continued flow tube, the 4th afterflow
Pipe, the 16th resistance, the first inductance, the 6th filter capacitor and load, described first reverse blocking IGBT and the second reverse blocking IGBT
In parallel, for realizing copped wave function, described first reverse blocking IGBT and the one of the parallel connection of the second reverse blocking IGBT by high frequency switching
Node is connected with the live wire of alternating current, and another node of described first reverse blocking IGBT and the parallel connection of the second reverse blocking IGBT is with described
One end of 16th resistance connects, and described 3rd continued flow tube and the 4th continued flow tube are in parallel, described 3rd continued flow tube and the 4th afterflow
The in parallel node of pipe is connected with one end of described 16th resistance, another of described 3rd continued flow tube and the parallel connection of the 4th continued flow tube
Node is connected with the zero line of alternating current, and the other end of described 16th resistance is connected with one end of described first inductance, and described
The other end of one inductance is connected with one end and the load of described 6th filter capacitor respectively, the other end of described 6th filter capacitor
It is connected with the zero line of described alternating current；
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 first electric capacity, the second electric capacity and the first stabilivolt, described voltage comparator
In-phase input end is connected with one end of described first resistance and one end of the second resistance respectively by described 5th resistance, and described the
The other end of one resistance is connected with the cathode output end of described rectification circuit, and the inverting input of described voltage comparator passes through institute
State the 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, described
The other end of three 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 be connected, a pin of described voltage comparator is respectively with described
One end of one 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
Connect, the outfan of described voltage comparator respectively with light emitting diode in the negative electrode of described first stabilivolt and photoelectrical coupler
Anode connects, and the anode of described first stabilivolt is connected with the cathode output end of described rectification circuit, in described photoelectrical coupler
The colelctor electrode of phototriode is connected with described voltage conversion circuit.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, described voltage sample
Module also includes the 8th resistance, and the outfan of described voltage comparator also one end with described 8th resistance is connected, the described 8th
The other end of resistance is connected with described first voltage source.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, described voltage is changed
Circuit includes audion, the 9th resistance and the tenth resistance, the base stage of described audion and photosensitive three poles in described photoelectrical coupler
The colelctor electrode of pipe connects, and the base stage of described audion connects the second voltage source also by described 9th resistance, described audion
Colelctor electrode connects described second voltage source, the grounded emitter of described audion by described tenth resistance.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, described smothing filtering
Circuit includes the 11st resistance, the 12nd resistance, the 13rd resistance, the 3rd electric capacity and the 4th electric capacity；Described 11st resistance
One end is connected with the colelctor electrode of described audion, the other end of described 11st resistance respectively with one end of described 12nd resistance
Connect with one end of the 3rd electric capacity, the other end, one end of the 13rd resistance and one end of the 4th electric capacity of described 12nd resistance
Being all connected with voltage output end, the other end of the other end, the other end of the 13rd resistance and the 4th electric capacity of described 3rd electric capacity is equal
Ground connection.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, described voltage sample
Module also includes the second stabilivolt, and the negative electrode of described second stabilivolt connects described voltage output end, described second stabilivolt
Plus earth.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, also include that electric current is adopted
Original mold block and display module, the input of described current sample module is connected with another outfan of described PWM module, institute
Another input of the outfan and described MCU of stating current sample module is connected, the outfan of described MCU and described display module
Input connect.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, also include output electricity
Pressure detection module, an input of described output voltage detection module drives another outfan of module to be connected with described SPWM,
Another input of described output voltage detection module is connected with the outfan of described sine-wave generator.
In the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, described rectification circuit
Including the first diode, the second diode, the 3rd diode and the 4th diode, the anode and the four or two of described first diode
The negative electrode of pole pipe all live wires with described alternating current are connected, the anode of described second diode and the negative electrode of the 3rd diode all with
The zero line of described alternating current connects, 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.
Implement the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features of the present invention, there is following useful effect
Really: owing to using Power Entry Module, input isolation module, PWM module, Transformer Rectifier filtration module, SPWM to drive mould
Block, LC filtration module, sine-wave generator, MCU and voltage sample module, sine-wave generator include the first reverse blocking IGBT,
Second reverse blocking IGBT, the 3rd continued flow tube, the 4th continued flow tube, the 16th resistance, the first inductance, the 6th filter capacitor and load,
First reverse blocking IGBT and the second reverse blocking IGBT are in parallel, for realizing copped wave function, voltage sample module by high frequency switching
Including the rectification circuit being sequentially connected with, voltage comparator circuit, photoelectrical coupler, voltage conversion circuit and smoothed filter circuit, electricity
Pressure comparison circuit includes voltage comparator, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th electricity
Resistance, the first electric capacity, the second electric capacity and the first stabilivolt, the first stabilivolt is for the voltage letter to the output of voltage comparator outfan
Number carrying out voltage stabilizing, power supply input can be effectively isolated by input isolation module, and SPWM changes exactly on the basis of PWM
Modulating pulse mode, pulse width time dutycycle presses the arrangement of sine gauge rate, and such output waveform is permissible through suitable filtering
Accomplishing sinewave output, LC filtration module is used for harmonic compensation, and employing photoelectrical coupler can be by MCU control signal and voltage
Sampled signal is effectively isolated, thus its be avoided that signal disturbing, ensure instrument gather data accurately, improve and use the longevity
Life, the weight that can alleviate, install more convenient, use extensively, can carry out being effectively isolated, carrying by control signal and voltage sampling signal
High sampling precision.
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 structure that the present invention has in one embodiment of pure sine wave inverter of high frequency chopping voltage stabilizing isolation features
Schematic diagram；
Fig. 2 is the circuit theory diagrams of sine-wave generator in described embodiment；
Fig. 3 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 high frequency chopping voltage stabilizing isolation features, this has high frequency and cuts
The structural representation of the pure sine wave inverter of ripple voltage stabilizing isolation features is as shown in Figure 1.In Fig. 1, this has high frequency chopping voltage stabilizing
The pure sine wave inverter of isolation features includes Power Entry Module 1, input isolation module 2, PWM module 3, Transformer Rectifier
Filtration module 4, SPWM drive module 5, LC filtration module 6, sine-wave generator 7, MCU8 and voltage sample module 9, wherein, defeated
One outfan of the input and Power Entry Module 1 that enter isolation module 2 is connected, and the outfan of input isolation module 2 is adjusted with PWM
The input of molding block 3 connects, and the input of Transformer Rectifier filtration module 4 is connected with the outfan of PWM module 3, SPWM
The input driving module 5 is connected with the outfan of Transformer Rectifier filtration module 4, the input of LC filtration module 6 and SPWM
The outfan driving module 5 connects, and the input of sine-wave generator 7 is connected with the outfan of LC filtration module 6, voltage sample
The input of module 9 is connected with another outfan of Power Entry Module 1, an input of MCU8 and voltage sample module 9
Outfan connects.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 sine-wave generator in the present embodiment.In Fig. 2, this sine-wave generator includes first
Reverse blocking IGBT Q11, the second reverse blocking IGBT Q12, the 3rd continued flow tube Q13, the 4th continued flow tube Q14, the 16th resistance R16,
One inductance L1, the 6th filter capacitor C6 and load, the first reverse blocking IGBT Q11 and the second reverse blocking IGBT Q12 are in parallel, be used for
Realize copped wave function by high frequency switching, a node in parallel for the first reverse blocking IGBT Q11 and the second reverse blocking IGBT Q12 with
The live wire ACL of alternating current connects, another node that the first reverse blocking IGBT Q11 and the second reverse blocking IGBT Q12 is in parallel and the
One end of 16 resistance R16 connects, and the 3rd continued flow tube Q13 and the 4th continued flow tube Q14 is in parallel, and the 3rd continued flow tube Q13 and the 4th continues
A node and one end of the 16th resistance R16 that flow tube Q14 is in parallel connect, and the 3rd continued flow tube Q13 and the 4th continued flow tube Q14 is in parallel
Another node be connected with the zero line ACN of alternating current, one end of the other end of the 16th resistance R16 and the first inductance L1 connects,
The other end of the first inductance L1 is connected with one end and the load of the 6th filter capacitor C6 respectively, the other end of the 6th filter capacitor C6
It is connected with the zero line ACN of alternating current.First inductance L1 is used for storage and the release of electric energy.
In the present embodiment, this sine-wave generator uses DSP CONTROL pulse width modulation, and then controls
First reverse blocking IGBT Q11 and the second reverse blocking IGBT Q12 carries out the high frequency chopping of two-phase, sampled signal to ac signal
Give digital signal processor through signal conditioning circuit and carry out feedback adjustment pulse width modulation output.First reverse blocking IGBT
Q11 and the second reverse blocking IGBT Q12 be one-way conduction I two reverse and close, chop control two-way to alternating current.Numeral
Signal processor can export high-frequency PWM, and higher frequency can reduce harmonic wave, and higher frequency can reduce the body of inductance
Long-pending, alleviate weight；Wave mode after copped wave output remains sinusoidal wave, sinusoidal wave to well adapting to property of electric lighting, comparison
Bright appliance life does not affect, rely on Voltage Feedback control can stably export set by illuminating energy-saving voltage.
Concrete, in the present embodiment, for the positive wave part of alternating current, alternating current is on the live wire ACL of alternating current
Acting on load after second reverse blocking IGBT Q12 and the first inductance L1 energy storage, then the zero line ACN with alternating current forms loop；
Then DSP CONTROL PWM is cut off the second reverse blocking IGBT Q12, the first inductance L1 and is started to release the electric energy of storage
Put and act on load, then forming loop with the 3rd continued flow tube Q13；Then digital signal processor does not stops according to certain frequency
Control PWM switch on or off the second reverse blocking IGBT Q12, alternating current positive wave part formed high frequency chopping.
For the negative wave part of alternating current, the alternating current the first reverse blocking IGBT Q11 on the live wire ACL of alternating current and
Acting on load after first inductance L1 energy storage, then the zero line ACN with alternating current forms loop；Then digital signal processor control
PWM processed cuts off the first reverse blocking IGBT Q11, the first inductance L1 to start discharged by the electric energy of storage and act on load, then with
4th continued flow tube Q14 forms loop；Then digital signal processor ceaselessly controls PWM and switches on or off according to certain frequency
One reverse blocking IGBT Q11, the negative wave part at alternating current forms high frequency chopping.
By the positive wave part of above-mentioned alternating current and negative wave part ceaselessly high frequency chopping, and then output high frequency chopping is sinusoidal
Ripple acts on load, and its higher frequency can reduce harmonic wave, and higher frequency can reduce the volume of the first inductance L1, alleviates
Weight；Copped wave the waveform after the 6th filter capacitor C6 filtering output remain sinusoidal wave, and sinusoidal wave have relatively electric lighting
Good adaptability, does not affect illumination appliance life, rely on Voltage Feedback control stably to export set by illumination joint
Piezoelectric voltage.
Fig. 3 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 first electric capacity C1, the second electric capacity C2 and the first stabilivolt ZD1, the homophase input of voltage comparator U2
End 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 is for right
The in-phase input end of voltage comparator U2 carries out current limliting, and the other end of the first resistance R1 connects with the cathode output end of rectification circuit
Connect, the inverting input of voltage comparator U2 by the 6th resistance R6 respectively with one end of the 3rd resistance R3, the 4th resistance R4
One end of one end and the first electric capacity C1 connects, and the 6th resistance R6 is used for the inverting input of voltage comparator U2 is carried 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 other end of the 4th resistance R4 and
The other end of the first electric capacity C1 is all connected with the cathode output end of rectification circuit, and a pin of voltage comparator U2 is respectively with
One end of one voltage source VDD1 and the second electric capacity C2 connects, and the other end of the second electric capacity C2 connects with the cathode output end of rectification circuit
Connect, the outfan of voltage comparator U2 respectively with light emitting diode in the negative electrode of the first stabilivolt ZD1 and photoelectrical coupler U1
Anode connects, and the anode of the first stabilivolt ZD1 is connected with the cathode output end of rectification circuit, and the first stabilivolt ZD1 is for electricity
The voltage signal of the outfan output of pressure comparator U2 carries out voltage stabilizing, the colelctor electrode of phototriode and electricity in photoelectrical coupler U1
Voltage conversion circuit connects.By using photoelectrical coupler U1 to isolate, control signal and sampled signal can be carried out effectively
Isolation, 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 with the 8th
One end of 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 high frequency chopping voltage stabilizing isolation features also includes current sample mould
Block 10 and display module 11, the input of current sample module 10 is connected with another outfan of PWM module 3, and electric current is adopted
The outfan of original mold block 10 is connected with another input of MCU8, and the outfan of MCU8 is connected with the input of display module 11.
Voltage and power can be found out intuitively by display module 11.
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 high frequency chopping voltage stabilizing isolation features is the most normal, can make work
Make personnel whole system is had to grasp well.
In the present embodiment, this pure sine wave inverter with high frequency chopping voltage stabilizing isolation features also includes that output voltage is examined
Surveying module 12, an input of output voltage detection module 12 drives another outfan of module 5 to be connected with SPWM, output voltage
Another input of detection 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, also
That is the voltage allowing this pure sine wave inverter with high frequency chopping voltage stabilizing isolation features finally obtain can meet needs.
In a word, in the present embodiment, this pure sine wave inverter with high frequency chopping voltage stabilizing isolation features is used in doctor
Treatment equipment, time on military equipment, will not produce the interference of signal, and the accuracy of the data that instrument records also obtains the biggest proposing
High.
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 high frequency chopping voltage stabilizing isolation features, it is characterised in that include that power supply inputs mould
Block, input isolation module, PWM module, Transformer Rectifier filtration module, SPWM drive module, LC filtration module, sine wave to send out
Raw device, MCU and voltage sample module, the input of described input isolation module connects with an outfan of described Power Entry Module
Connecing, the outfan of described input isolation module is connected with the input of described PWM module, described Transformer Rectifier filtration module
Input be connected with the outfan of described PWM module, described SPWM drive module an input whole with described transformation
The outfan of stream filtration module connects, and the input of described LC filtration module drives the outfan of module to be connected with described SPWM,
The input of described sine-wave generator is connected with the outfan of described LC filtration module, the input of described voltage sample module
It is connected with another outfan of described Power Entry Module, an input of described MCU and the output of described voltage sample module
End connects；
Described sine-wave generator include the first reverse blocking IGBT, the second reverse blocking IGBT, the 3rd continued flow tube, the 4th continued flow tube,
16th resistance, the first inductance, the 6th filter capacitor and load, described first reverse blocking IGBT and the second reverse blocking IGBT are also
Join, for realizing, by high frequency switching, the joint that copped wave function, described first reverse blocking IGBT and the second reverse blocking IGBT are in parallel
Point is connected with the live wire of alternating current, described first reverse blocking IGBT and another node of the second reverse blocking IGBT parallel connection and described the
One end of 16 resistance connects, and described 3rd continued flow tube and the 4th continued flow tube are in parallel, described 3rd continued flow tube and the 4th continued flow tube
A node in parallel is connected with one end of described 16th resistance, another joint of described 3rd continued flow tube and the parallel connection of the 4th continued flow tube
Point is connected with the zero line of alternating current, and the other end of described 16th resistance is connected with one end of described first inductance, and described first
The other end of inductance is connected with one end of described 6th filter capacitor and load respectively, the other end of described 6th filter capacitor and
The zero line of described alternating current connects；
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 first electric capacity, the second electric capacity and the first stabilivolt, the homophase of described voltage comparator is defeated
Enter end to be 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 be connected with the cathode output end of described rectification circuit, the inverting input of described voltage comparator pass through the 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, described 3rd resistance
The other end connect the first voltage source, another of the other end of described second resistance, the other end of the 4th resistance and the first electric capacity
End all cathode output ends with described rectification circuit are connected, a pin of described voltage comparator respectively with described first voltage
One end of source and the second electric capacity connects, and the other end of described second electric capacity is connected with the cathode output end of described rectification circuit, institute
State the outfan of voltage comparator respectively with the anode of light emitting diode in the negative electrode of described first stabilivolt and photoelectrical coupler
Connecting, the anode of described first stabilivolt is connected with the cathode output end of described rectification circuit, photosensitive in described photoelectrical coupler
The colelctor electrode of audion is connected with described voltage conversion circuit.
The pure sine wave inverter with high frequency chopping voltage stabilizing 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 with one end of described 8th resistance even
Connecing, the other end of described 8th resistance is connected with described first voltage source.
The pure sine wave inverter with high frequency chopping voltage stabilizing isolation features the most according to claim 2, it is characterised in that
Described voltage conversion circuit includes audion, the 9th resistance and the tenth resistance, the base stage of described audion and described photoelectric coupling
In device, the colelctor electrode of phototriode connects, and the base stage of described audion connects the second voltage source also by described 9th resistance,
The colelctor electrode of described audion connects described second voltage source, the grounded emitter of described audion by described tenth resistance.
The pure sine wave inverter with high frequency chopping voltage stabilizing 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
One end of 11st resistance is connected with the colelctor electrode of described audion, and the other end of described 11st resistance is respectively with the described tenth
One end of one end of two resistance and the 3rd electric capacity connects, the other end of described 12nd resistance, one end of the 13rd resistance and the
One end of four electric capacity is all connected with voltage output end, the other end of described 3rd electric capacity, the other end of the 13rd resistance and the 4th electricity
The equal ground connection of the other end held.
The pure sine wave inverter with high frequency chopping voltage stabilizing isolation features the most according to claim 4, it is characterised in that
Described voltage sample module also includes the second stabilivolt, and the negative electrode of described second stabilivolt connects described voltage output end, described
The plus earth of the second stabilivolt.
6. according to the pure sine wave inverter with high frequency chopping voltage stabilizing isolation features described in claim 1 to 5 any one,
It is characterized in that, also include current sample module and display module, the input of described current sample module and described PWM
Another outfan of module connects, and the outfan of described current sample module is connected with another input of described MCU, described
The outfan of MCU is connected with the input of described display module.
The pure sine wave inverter with high frequency chopping voltage stabilizing isolation features the most according to claim 6, it is characterised in that
Also include that output voltage detection module, an input of described output voltage detection module drive another of module with described SPWM
Outfan 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 high frequency chopping voltage stabilizing 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, described first diode
The negative electrode of anode and the 4th diode all live wires with described alternating current are connected, the anode of described second diode and the three or two pole
The negative electrode of pipe all zero lines with described alternating current are connected, after the negative electrode of described first diode and the negative electrode of the second diode connect
Conduct after connecting as the cathode output end of described rectification circuit, the anode of described 3rd diode and the anode of the 4th diode
The cathode output end of described rectification circuit.
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| CN201610513775.8A CN106100419A (en) | 2016-07-04 | 2016-07-04 | A kind of pure sine wave inverter with high frequency chopping voltage stabilizing isolation features |
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Citations (3)
| 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 |
| CN204119046U (en) * | 2014-10-17 | 2015-01-21 | 智造节能科技（苏州）有限公司 | A kind of high frequency chopping sinusoidal wave output circuit |
-
2016
- 2016-07-04 CN CN201610513775.8A patent/CN106100419A/en active Pending
Patent Citations (3)
| 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 |
| CN204119046U (en) * | 2014-10-17 | 2015-01-21 | 智造节能科技（苏州）有限公司 | A kind of high frequency chopping sinusoidal wave output circuit |
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Application publication date: 20161109 |