CN205407621U - Inverter power supply - Google Patents
Inverter power supply Download PDFInfo
- Publication number
- CN205407621U CN205407621U CN201620153852.9U CN201620153852U CN205407621U CN 205407621 U CN205407621 U CN 205407621U CN 201620153852 U CN201620153852 U CN 201620153852U CN 205407621 U CN205407621 U CN 205407621U
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- cw3525a
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Abstract
The utility model discloses an inverter power supply, include the pulse width modulation circuit, switch circuit and connection the boost circuit on switch circuit of connection on pulse width modulation circuit that constitute by chip CW3525A and peripheral circuit, boost circuit's output and pulse width modulation circuit between be connected with sample feedback circuit, switch circuit include the triode, its stability is good.
Description
Technical field
This utility model relates to a kind of inverter.
Background technology
At present, conventional the having of inverter of the prior art: monofocal inverter, semi-bridge type inverter, push-pull dc-to-ac, full-bridge inverter etc..Wherein: the good reliability of monofocal inverter, but efficiency is low, is generally only used for low power electric appliance；The efficiency of push-pull type and bridge-type inverter is high, but poor reliability, there is the shortcomings such as easy straight-through, shutoff voltage stress height, magnetic bias.
Although the kind of existing power inverter is a lot, but, its ubiquity stability is not strong.
Utility model content
This utility model provides a kind of inverter, its good stability to solve above-mentioned technical problem.
The technical scheme in the invention for solving the above technical problem is:
A kind of inverter, including the pulse-width modulation circuit being made up of chip CW3525A and peripheral circuit thereof, the on-off circuit being connected on pulse-width modulation circuit and the booster circuit that is connected on on-off circuit, being connected to sampling feedback circuit between outfan and the pulse-width modulation circuit of described booster circuit, described on-off circuit includes audion.
Of the present utility model chip CW3525A and peripheral circuit thereof is utilized to constitute pulse-width modulation circuit, it has been internally integrated reference power supply, agitator, error amplifier, pwm comparator, trigger, latch etc., there is the driving force of 200mA, can the performance of intensifier circuit.Sampling feedback circuit is connected between the outfan and pulse-width modulation circuit of booster circuit, the sampling value of sampling feedback circuit sends into the error amplifier within chip CW3525A and pwm comparator processes, and then be adjusted controlling to the pulsewidth of output, to reach the purpose of regulated output voltage.Adopt chip CW3525A and peripheral circuit thereof to constitute pulse-width modulation circuit, can further simplify circuit structure, reduce cost.Utilizing audion as switching device, it is easy to control, and is conducive to improving power source performance, and with low cost.
As preferably, described sampling feedback circuit includes bridge rectifier, the input of described bridge rectifier is connected on the outfan of booster circuit, and the outfan of bridge rectifier is connected on the 1st pin of chip CW3525A by the 6th resistance and is connected to the 4th electric capacity of ground connection on outfan.
As preferably, 1st pin of the chip CW3525A of described pulse-width modulation circuit, the 2nd pin, the 6th pin are connected to earth resistance respectively, 5th pin, the 16th pin are connected to ground capacity respectively, it is connected to the 3rd resistance between 2nd pin of described chip CW3525A, the 16th pin, it is connected to the 5th resistance between 5th pin of described chip CW3525A, the 7th pin, the 12nd pin ground connection of described chip CW3525A, the 15th pin and the 13rd pin of described chip CW3525A are connected with power supply each through electric fuse.
Further, described on-off circuit includes the first audion and the second audion, the base stage of the first described audion is connected with the 11st pin of chip CW3525A, the base stage of the second described audion is connected with the 14th pin of chip CW3525A, the equal ground connection of emitter stage of the first described audion and the second audion, the colelctor electrode of the first described audion and the colelctor electrode of the second audion are both connected on booster circuit.
Further, described booster circuit includes transformator, and the two ends on the former limit of described transformator are connected with the colelctor electrode of the colelctor electrode of the first audion and the second audion respectively.
Further, the former limit of described transformator is connected on electric fuse.
To sum up, the beneficial effects of the utility model are:
1, this utility model is connecting sampling feedback circuit between the outfan and pulse-width modulation circuit of booster circuit, the sampling value of sampling feedback circuit sends into the error amplifier within chip CW3525A and pwm comparator processes, and then be adjusted controlling to the pulsewidth of output, its good stability.
2, this utility model adopts chip CW3525A and peripheral circuit thereof to constitute pulse-width modulation circuit, can further simplify circuit structure, reduce cost.
3, this utility model utilizes audion as switching device, and it is easy to control, and is conducive to improving power source performance, and with low cost.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Embodiment 1:
A kind of inverter, including the pulse-width modulation circuit being made up of chip CW3525A and peripheral circuit thereof, the on-off circuit being connected on pulse-width modulation circuit and the booster circuit that is connected on on-off circuit, being connected to sampling feedback circuit between outfan and the pulse-width modulation circuit of described booster circuit, described on-off circuit includes audion.
Embodiment 2:
As it is shown in figure 1, the present embodiment is based on the basis of above-described embodiment, open one is preferred embodiment.
Described sampling feedback circuit includes bridge rectifier, the input of described bridge rectifier is connected on the outfan of booster circuit, and the outfan of bridge rectifier is connected on the 1st pin of chip CW3525A by the 6th resistance and is connected to the 4th electric capacity of ground connection on outfan.
1st pin of the chip CW3525A of described pulse-width modulation circuit, the 2nd pin, the 6th pin are connected to earth resistance respectively, 5th pin, the 16th pin are connected to ground capacity respectively, it is connected to the 3rd resistance between 2nd pin of described chip CW3525A, the 16th pin, it is connected to the 5th resistance between 5th pin of described chip CW3525A, the 7th pin, the 12nd pin ground connection of described chip CW3525A, the 15th pin and the 13rd pin of described chip CW3525A are connected with power supply each through electric fuse.1st pin of chip CW3525A is to the 16th pin respectively IN-、IN+、SYNC、OUTOSC、Cr、Rr、DIS、SS、COMP、SD、OUTA、GND、VC、OUTB、Vi、VREF.It is the connection status that chip normally uses in this pin annexation not being mentioned to.
Described on-off circuit includes the first audion and the second audion, the base stage of the first described audion is connected with the 11st pin of chip CW3525A, the base stage of the second described audion is connected with the 14th pin of chip CW3525A, the equal ground connection of emitter stage of the first described audion and the second audion, the colelctor electrode of the first described audion and the colelctor electrode of the second audion are both connected on booster circuit.
Described booster circuit includes transformator, and the two ends on the former limit of described transformator are connected with the colelctor electrode of the colelctor electrode of the first audion and the second audion respectively.
Its operation principle is: the operating frequency of chip CW3525A internal oscillator is determined by its 5th pin, the 6th pin external timing resistance and timing capacitor, after being distributed by internal trigger and gate circuit, export driving pulse in turn from its 11st pin and the 14th pin, control the first audion, the second audion turns in turn.When the first triode ON, now the second audion cut-off, power supply passes through transformer primary side the first half through the first audion to ground.When the second triode ON, now the first audion cut-off, power supply is by transformer primary side the latter half the second audion to ground.By the synthesis of transformator and boosting, the secondary at transformator can obtain alternating voltage.Due to the transformer coil obstruction to radio-frequency component, secondary waveform has not been square wave, can be seen as quasi-sine-wave.Adopt the quasi sine waveform of upper frequency, be conducive to improving efficiency and getting rid of Industrial Frequency Transformer, also can make most of electrical equipment normal operation.Between 5th pin and the 7th pin of chip CW3525A, institute's connecting resistance is in order to regulate Dead Time.Dead Time is set and can ensure that the first audion, the second audion do not have situation about simultaneously turning on, improve the safety and reliability of circuit.Bridge rectifier and the 4th electric capacity composition sampling feedback circuit.The alternating voltage of outfan is after the earth resistance dividing potential drop on bridge rectifier, the 4th capacitor filtering, the 6th resistance and the 1st pin, send into chip CW3525A internal error amplifier from the 1st pin and comparator processes, and then automatically control the output pulse width of the 11st pin and the 14th pin, reach the purpose of regulated output voltage.
As it has been described above, this utility model can be realized preferably.
Claims (6)
1. an inverter, it is characterized in that: include the pulse-width modulation circuit being made up of chip CW3525A and peripheral circuit thereof, the on-off circuit being connected on pulse-width modulation circuit and the booster circuit being connected on on-off circuit, being connected to sampling feedback circuit between outfan and the pulse-width modulation circuit of described booster circuit, described on-off circuit includes audion.
2. a kind of inverter according to claim 1, it is characterized in that: described sampling feedback circuit includes bridge rectifier, the input of described bridge rectifier is connected on the outfan of booster circuit, and the outfan of bridge rectifier is connected on the 1st pin of chip CW3525A by the 6th resistance and is connected to the 4th electric capacity of ground connection on outfan.
3. a kind of inverter according to claim 1, it is characterized in that: the 1st pin of the chip CW3525A of described pulse-width modulation circuit, 2nd pin, 6th pin is connected to earth resistance respectively, 5th pin, 16th pin is connected to ground capacity respectively, 2nd pin of described chip CW3525A, it is connected to the 3rd resistance between 16th pin, 5th pin of described chip CW3525A, it is connected to the 5th resistance between 7th pin, the 12nd pin ground connection of described chip CW3525A, 15th pin and the 13rd pin of described chip CW3525A are connected with power supply each through electric fuse.
4. a kind of inverter according to claim 3, it is characterized in that: described on-off circuit includes the first audion and the second audion, the base stage of the first described audion is connected with the 11st pin of chip CW3525A, the base stage of the second described audion is connected with the 14th pin of chip CW3525A, the equal ground connection of emitter stage of the first described audion and the second audion, the colelctor electrode of the first described audion and the colelctor electrode of the second audion are both connected on booster circuit.
5. a kind of inverter according to claim 4, it is characterised in that: described booster circuit includes transformator, and the two ends on the former limit of described transformator are connected with the colelctor electrode of the colelctor electrode of the first audion and the second audion respectively.
6. a kind of inverter according to claim 5, it is characterised in that: the former limit of described transformator is connected on electric fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620153852.9U CN205407621U (en) | 2016-03-01 | 2016-03-01 | Inverter power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620153852.9U CN205407621U (en) | 2016-03-01 | 2016-03-01 | Inverter power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205407621U true CN205407621U (en) | 2016-07-27 |
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ID=56947857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620153852.9U Expired - Fee Related CN205407621U (en) | 2016-03-01 | 2016-03-01 | Inverter power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205407621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208792A (en) * | 2016-03-01 | 2016-12-07 | 四川行之智汇知识产权运营有限公司 | A kind of inverter power supply device |
-
2016
- 2016-03-01 CN CN201620153852.9U patent/CN205407621U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208792A (en) * | 2016-03-01 | 2016-12-07 | 四川行之智汇知识产权运营有限公司 | A kind of inverter power supply device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160727 Termination date: 20170301 |