CN202737778U - Variable-power 400W inverter - Google Patents
Variable-power 400W inverter Download PDFInfo
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- CN202737778U CN202737778U CN2012204143778U CN201220414377U CN202737778U CN 202737778 U CN202737778 U CN 202737778U CN 2012204143778 U CN2012204143778 U CN 2012204143778U CN 201220414377 U CN201220414377 U CN 201220414377U CN 202737778 U CN202737778 U CN 202737778U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a variable-power 400W inverter including a 12V DC power source, a multi-vibrator circuit, a pulse width modulating circuit, a voltage comparison circuit, a push-pull power amplifying circuit, a boosting circuit and an output square-wave voltage reshaping circuit. The variable-power 400W inverter is characterized in that the specification of a pulse width modulating oscillating circuit IC1 in the multi-vibrator circuit is SG3524. A storage battery is adopted as a power source for applying invert technology to manufacture the variable-power 400W inverter. The variable-power 400W inverter is comparatively practical for handling the temporary interruption of a power supply line. The variable-power 400W inverter provided by the utility model has a simple circuit structure, less peripheral elements, a high converting efficiency and a low temperature rise in a rated power range. The output power of the variable-power 400W inverter achieves 400W. The output power of the variable-power 400W inverter can be adjusted through modulating the pulse width by an external potentiometer. The variable-power 400W inverter provided by the utility model is suitable for electric devices such as universal lighting devices, computers, electronic instruments and the like. The variable-power 400W inverter can work as an emergency power source during short-term power interruption of the power supply line, and also can work as an emergency lighting power source or a firefighting emergency power supply for different public occasions.
Description
Technical field
The utility model belongs to electronic technology and emergency power supply technical field, is about the adjustable four hectowatt inverters of a kind of power.
Background technology
Power supply is more and more important to people's production, life, particularly in a single day interruption of power supply in evening, bring very burden will for people's normal operation, living and studying.Direct-flow inverter is a kind of stand-by power supply that is independent of outside the utility grid, and with the inverter that storage battery is made as the application of power inversion transformation technique, reply supply line temporary interruption is more feasible.
The characteristics of the utility model circuit: circuit structure is simple, peripheral cell is few, conversion efficiency is high, little, the power output of temperature rise reaches 400W in the rated power scope, by the power output of external potentiometer modulation pulsewidth capable of regulating inverter.
Power described in the utility model is adjustable, and four hectowatt inverters are suitable for the electrical appliances such as general-purpose lighting apparatus, computer, electronic instrument, can be used as the emergency power supply of supply line's short time when having a power failure, also be applicable to emergency lighting or the fire-fighting emergency power supply of various public places; Select two groups of 12V, the power supply of 20AH maintenance free cell, this inverter fully loaded operating time is about 1 hour.
Below describe the adjustable four hectowatt inverters of power described in the utility model related relevant technologies content in implementation process in detail.
The utility model content
Goal of the invention and beneficial effect: direct-flow inverter is a kind of stand-by power supply that is independent of outside the utility grid, and with the inverter that storage battery is made as the application of power inversion transformation technique, reply supply line temporary interruption is more feasible.The characteristics of the utility model circuit: circuit structure is simple, peripheral cell is few, conversion efficiency is high, little, the power output of temperature rise reaches 400W in the rated power scope, by the power output of external potentiometer modulation pulsewidth capable of regulating inverter.
Power described in the utility model is adjustable, and four hectowatt inverters are suitable for the electrical appliances such as general-purpose lighting apparatus, computer, electronic instrument, and reply supply line temporary interruption is more feasible, also are applicable to emergency lighting or the fire-fighting emergency power supply of various public places.
The circuit working principle: power is adjustable, and four hectowatt inverters are that the inversion of storage battery 12V voltage is become the 220V square-wave voltage.
Inverter is by being pulse-width modulation oscillating circuit IC1(SG3524) and related elements formation multivibrator circuit, the frequency of oscillation of circuit is 50～250Hz, carry out pulse-width modulation at pulse-width modulation oscillating circuit IC1 the 9th pin by external linear potentiometer, thereby control power output, at pulse-width modulation oscillating circuit IC1 the 2nd pin external voltage comparison circuit, can stablize the output square-wave voltage.By the 11st pin, two outputs of the 14th pin of pulse-width modulation oscillating circuit IC1, directly drive the push-pull power amplifier circuit that is formed by N channel enhancement field effect transistor VT1～VT2, by step-up transformer T output 220V square-wave voltage; The output access capacitor C 3 of step-up transformer T is used for the shaping of output square-wave voltage.
Technical scheme: power is adjustable four hectowatt inverters, it comprises 12V DC power supply, multivibrator circuit, pulse-width modulation circuit, voltage comparator circuit, push-pull power amplifier circuit, booster circuit and output square-wave voltage shaping circuit, it is characterized in that:
Multivibrator circuit: by pulse-width modulation oscillating circuit IC1, resistance R 2, resistance R 4 and resistance R 6, capacitor C 2 forms, the model that pulse-width modulation oscillating circuit IC1 selects is SG3524, the 1st pin of pulse-width modulation oscillating circuit IC1 is by resistance R 2 connection circuit ground GND, the 4th pin of pulse-width modulation oscillating circuit IC1, the 5th pin and the 8th pin connection circuit ground GND, the 6th pin of pulse-width modulation oscillating circuit IC1 is by resistance R 6 connection circuit ground GND, the 7th pin of pulse-width modulation oscillating circuit IC1 is by capacitor C 2 connection circuit ground GND, the end of the 12nd pin of pulse-width modulation oscillating circuit IC1 and the 13rd pin connecting resistance R4, the anodal VCC of the 15th pin of pulse-width modulation oscillating circuit IC1 and the other end connection circuit of resistance R 4;
Pulse-width modulation circuit: formed by resistance R 1, electrochemical capacitor C1 and linear potentiometer RP, the 9th pin of pulse-width modulation oscillating circuit IC1 links to each other with an end of the end of linear potentiometer RP, resistance R 1 and the negative pole of electrochemical capacitor C1, the 1st pin of pulse-width modulation oscillating circuit IC1 connects the positive pole of electrochemical capacitor C1, the other end of linear potentiometer RP and lever arm connection circuit ground GND thereof, the anodal VCC of the other end connection circuit of resistance R 1;
Voltage comparator circuit: formed by resistance R 3 and resistance R 5, the end of the 2nd pin connecting resistance R3 of pulse-width modulation oscillating circuit IC1 and an end of resistance R 5, the other end connection circuit ground GND of resistance R 3, the other end of the 16th pin connecting resistance R5 of pulse-width modulation oscillating circuit IC1;
Recommend power output circuit: the 14th pin of pulse-width modulation oscillating circuit IC1 connects the grid of N channel enhancement field effect transistor VT1, the drain electrode of N channel enhancement field effect transistor VT1 connects the Same Name of Ends of step-up transformer T primary coil L1, the anodal VCC of the Same Name of Ends connection circuit of the different name end of step-up transformer T primary coil L1 and step-up transformer T primary coil L2, the 11st pin of pulse-width modulation oscillating circuit IC1 connects the grid of N channel enhancement field effect transistor VT2, the drain electrode of N channel enhancement field effect transistor VT2 connects the different name end of step-up transformer T primary coil L2, the source electrode connection circuit ground GND of the source electrode of N channel enhancement field effect transistor VT1 and N channel enhancement field effect transistor VT2;
Booster circuit and output voltage shaping circuit: be comprised of step-up transformer T secondary coil L3, capacitor C 3 and 220V supply socket CZ, the two ends of step-up transformer T secondary coil L3 are connected on respectively the two ends of capacitor C 3 and 220V supply socket CZ.
The anodal VCC of 12V dc power anode connection circuit, the 12V dc power cathode links to each other with circuit ground GND.
Description of drawings
Embodiment
Circuit working schematic diagram and description of drawings according to the adjustable four hectowatt inverters of power shown in the accompanying drawing 1, and according to the annexation between the components and parts in the described circuit of utility model content, and the components and parts technical parameter described in the execution mode requires to implement to realize the utility model.
The selection of components and parts and technical parameter
IC1 is the pulse-width modulation oscillating circuit, and the model of selecting is SG3524;
VT1～VT2 is N channel enhancement field effect transistor, and the model of selecting is IRF1010, and to require technical parameter be 50V, more than the 50A, packing forms TO-220;
Resistance is selected the metalfilmresistor of 1/4W, and the resistance of resistance R 1 is 4.7k Ω; The resistance of resistance R 2 is 100k Ω; The resistance of resistance R 3 is 10k Ω; Resistance R 4 resistances are 2k Ω; Resistance R 5 resistances are 15k Ω; The resistance of resistance R 6 is 57k Ω;
RP is linear potentiometer, and its resistance is 22k Ω;
C1 is electrochemical capacitor, and capacity is 0.33 μ F/25V; C2 is electric capacity of the dacron, and its capacity is 0.1 μ F; C3 is electric capacity of the dacron, and its capacity is 0.1 μ F/500V;
The 12V DC current source is selected two groups of 12V, 20AH maintenance free cell;
CZ is the 220V supply socket.
Circuit production main points, circuit debugging and use
The making of step-up transformer T: the magnetic core of step-up transformer T is selected EI type ferrite magnetic core or ring type magnetic core, and selecting common EI type or FF type silicon steel sheet is iron core, and its power supply conversion efficiency will reduce; The core dimensions of silicon steel sheet is 4cm * 4cm, primary coil L1 10 strands of coiling 30 circles of ￠ 0.35mm enamelled wire (No. 29), primary coil L2 ￠ 0.35mm10 thigh coiling 30 circles, secondary coil 0.9mm enamelled wire (No. 20) coiling 600 circles; Magazine can be made of the thick hard card paper of 1mm, and notes the mark of primary coil L1, primary coil L2 Same Name of Ends; The frequency of oscillation of the utility model circuit is up to 250Hz, and is higher five times than power frequency 50Hz, and when selecting frequency of oscillation to be 250Hz, the number of turn of the size of step-up transformer T and primary coil and secondary rolling thread circle can reduce in right amount;
The frequency of oscillation of the parameter decision-making circuit of the 7th pin of pulse-width modulation oscillating circuit IC1, the resistance that the 6th pin connects and electric capacity;
N channel enhancement field effect transistor VT1～VT2 is high-power components, and use must be installed the large scale radiator additional;
Connect the load of 300W in 220V supply socket CZ, circuitry can be heard slight frizzle after connecting the 12V DC power supply, and starting of oscillation of multivibrator circuit is described; If multivibrator circuit does not have starting of oscillation, the two ends of primary coil L1 or primary coil L2 can be exchanged and get final product;
Adjust potentiometer RP2, the frequency of oscillation of capable of regulating circuit, the frequency of oscillation that suitably improves multivibrator circuit is conducive to improve the conversion efficiency of inverter, but frequency of oscillation requirement≤55Hz, otherwise might have influence on the use safety of some electrical appliance;
If need further to increase power output, if on N channel enhancement field effect transistor VT1～VT2 respectively and connect 1～2 N channel enhancement field effect transistor that technical parameter is consistent;
When the utility model output was unloaded, its output voltage can be higher than 250V.
Claims (2)
1. adjustable four hectowatt inverters of power, it comprises 12V DC power supply, multivibrator circuit, pulse-width modulation circuit, voltage comparator circuit, push-pull power amplifier circuit, booster circuit and output square-wave voltage shaping circuit, it is characterized in that:
Multivibrator circuit is by pulse-width modulation oscillating circuit IC1, resistance R 2, resistance R 4 and resistance R 6, capacitor C 2 forms, the model that pulse-width modulation oscillating circuit IC1 selects is SG3524, the 1st pin of pulse-width modulation oscillating circuit IC1 is by resistance R 2 connection circuit ground GND, the 4th pin of pulse-width modulation oscillating circuit IC1, the 5th pin and the 8th pin connection circuit ground GND, the 6th pin of pulse-width modulation oscillating circuit IC1 is by resistance R 6 connection circuit ground GND, the 7th pin of pulse-width modulation oscillating circuit IC1 is by capacitor C 2 connection circuit ground GND, the end of the 12nd pin of pulse-width modulation oscillating circuit IC1 and the 13rd pin connecting resistance R4, the anodal VCC of the 15th pin of pulse-width modulation oscillating circuit IC1 and the other end connection circuit of resistance R 4;
Pulse-width modulation circuit is comprised of resistance R 1, electrochemical capacitor C1 and linear potentiometer RP, the 9th pin of pulse-width modulation oscillating circuit IC1 links to each other with an end of the end of linear potentiometer RP, resistance R 1 and the negative pole of electrochemical capacitor C1, the 1st pin of pulse-width modulation oscillating circuit IC1 connects the positive pole of electrochemical capacitor C1, the other end of linear potentiometer RP and lever arm connection circuit ground GND thereof, the anodal VCC of the other end connection circuit of resistance R 1;
Voltage comparator circuit is comprised of resistance R 3 and resistance R 5, the end of the 2nd pin connecting resistance R3 of pulse-width modulation oscillating circuit IC1 and an end of resistance R 5, the other end connection circuit ground GND of resistance R 3, the other end of the 16th pin connecting resistance R5 of pulse-width modulation oscillating circuit IC1;
The 14th pin of recommending pulse-width modulation oscillating circuit IC1 in the power output circuit connects the grid of N channel enhancement field effect transistor VT1, the drain electrode of N channel enhancement field effect transistor VT1 connects the Same Name of Ends of step-up transformer T primary coil L1, the anodal VCC of the Same Name of Ends connection circuit of the different name end of step-up transformer T primary coil L1 and step-up transformer T primary coil L2, the 11st pin of pulse-width modulation oscillating circuit IC1 connects the grid of N channel enhancement field effect transistor VT2, the drain electrode of N channel enhancement field effect transistor VT2 connects the different name end of step-up transformer T primary coil L2, the source electrode connection circuit ground GND of the source electrode of N channel enhancement field effect transistor VT1 and N channel enhancement field effect transistor VT2;
Booster circuit and output voltage shaping circuit are comprised of step-up transformer T secondary coil L3, capacitor C 3 and 220V supply socket CZ, and the two ends of step-up transformer T secondary coil L3 are connected on respectively the two ends of capacitor C 3 and 220V supply socket CZ.
2. adjustable four hectowatt inverters of power according to claim 1 is characterized in that: the anodal VCC of 12V dc power anode connection circuit, the 12V dc power cathode links to each other with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204143778U CN202737778U (en) | 2012-08-20 | 2012-08-20 | Variable-power 400W inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204143778U CN202737778U (en) | 2012-08-20 | 2012-08-20 | Variable-power 400W inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202737778U true CN202737778U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204143778U Expired - Fee Related CN202737778U (en) | 2012-08-20 | 2012-08-20 | Variable-power 400W inverter |
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| CN (1) | CN202737778U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780415A (en) * | 2012-08-20 | 2012-11-14 | 何林 | Power-adjustable four-hundred watt inverter |
| CN108336915A (en) * | 2017-12-29 | 2018-07-27 | 河南北瑞电子科技有限公司 | A kind of DC switching power supply |
-
2012
- 2012-08-20 CN CN2012204143778U patent/CN202737778U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780415A (en) * | 2012-08-20 | 2012-11-14 | 何林 | Power-adjustable four-hundred watt inverter |
| CN108336915A (en) * | 2017-12-29 | 2018-07-27 | 河南北瑞电子科技有限公司 | A kind of DC switching power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20130820 |