CN203205837U - Simple and practical surge suppression circuit and switch power supply - Google Patents
Simple and practical surge suppression circuit and switch power supply Download PDFInfo
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- CN203205837U CN203205837U CN 201320030176 CN201320030176U CN203205837U CN 203205837 U CN203205837 U CN 203205837U CN 201320030176 CN201320030176 CN 201320030176 CN 201320030176 U CN201320030176 U CN 201320030176U CN 203205837 U CN203205837 U CN 203205837U
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Abstract
Provided are a simple and practical surge suppression circuit and a switch power supply. The surge suppression circuit comprises a fuse module, a bridge rectifier module and a filter module. AD commercial power is inputted to the fuse module, and then outputted to the bridge rectifier module through the fuse module. After being rectified by the bridge rectifier module, the AD commercial power is outputted to the filter module, and then is outputted after passing through the filter module. The switch power supply comprises the surge suppression circuit and a switch power supply main circuit. The externally connected commercial power passes through the surge suppression circuit and then is outputted to the switch power supply main circuit. A surge suppression loop circuit composed of a thermal fuse resistor, a fuse resistor, a bridge rectifying circuit and a p-type filter circuit can completely replace a suppression mode commonly used in the industry. Besides, the surge suppression circuit does not need a voltage dependent resistor, a thermistor, a common mode inductance, an X capacitor, etc. compared with the suppression mode commonly used in the industry so that a material cost is greatly reduced. The surge suppression loop circuit can be applied to a power product with a power of being lower than or equal to 12W, and the cost of the integrated whole device is greatly reduced in comparison with similar products of conventional schemes and is high in market competitiveness.
Description
Technical field
The utility model discloses a kind of surge restraint circuit and Switching Power Supply, particularly a kind of simple and practical surge restraint circuit and Switching Power Supply.
Background technology
The civil power environment is because industry use and civilian at present, and many reasons such as weather conditions, make and to have situations such as surge, high pressure breakthrough, temporary overvoltage, voltage sag, noise jamming, frequency drift in the electrical network, so can cause the AC voltage ripple of power network, so just make the civil power that inserts the user have various problems.Switching Power Supply more and more becomes the high-low pressure switching device in people's daily life with its good performance, in people life by more and more widely application.Fluctuation along with line voltage; usually can have influence on the performance of Switching Power Supply self; in order to promote reliability of products; the common practice of industry is that the mains electricity input end part is made corresponding processing of circuit; generally be by adding that in input fuse rear end devices such as piezo-resistance, thermistor, common mode inductance and X electric capacity suppress the surge inflow late-class circuit that the electrical network sudden change produces, the reliability of level work after the assurance Switching Power Supply.But this kind way is because the device that uses is too many, and cost is too high, can make the complete machine cost too high when 12W uses with interior power supply product, can't increase and get the more market share, and the market competitiveness is too low.And any insurance resistance of existing market all exists the phenomenon (comprising half short circuit fast thawing type) that can't in time fuse; thereby insurance resistance is when unusual little electric current but can't fuse; can reach heat balance; the insurance resistance generation high temperature that can generate heat; when situation was serious, insurance resistive surface temperature can surpass 600 ℃ usually, and the resistive element surface can continue rubescent; may burn peripheral devices, pcb board and plastic (charger case) like this, bring serious potential safety hazard.
Summary of the invention
Electrical network surge restraint circuit part-structure complexity at the above-mentioned Switching Power Supply of mentioning of the prior art, the shortcoming that cost is too high, the utility model provides a kind of new simple and practical surge restraint circuit and Switching Power Supply, it is by the cooperation of insurance module, bridge rectifier module and filtration module, can replace conventional surge restraint circuit fully, and reach equal effect.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of simple and practical surge restraint circuit, surge restraint circuit comprises insurance module, bridge rectifier module and filtration module, electric main input insurance module, export the bridge rectifier module to through insurance module, after the rectification of bridge rectifier module, export filtration module to, behind filtration module, export.
A kind of Switching Power Supply that adopts above-mentioned simple and practical surge restraint circuit, Switching Power Supply comprises surge restraint circuit and Switching Power Supply main circuit, external civil power exports the Switching Power Supply main circuit to behind surge restraint circuit.
The technical scheme that its technical problem that solves the utility model adopts further comprises:
Described filtration module adopts π type filtration module.
Described π type filtration module comprises capacitor C 1, capacitor C 2 and inductance L 1, and cross-over connection has capacitor C 1 and capacitor C 2 on positive power line and the negative power line, and capacitor C 1 and capacitor C 2 are connected in parallel, and are connected with inductance L 1 on the power line between capacitor C 1 and the capacitor C 2.
Described insurance module comprises Temperature protection resistance FR1 and insurance resistance FR2, and Temperature protection resistance FR1 is serially connected on the live wire L, and insurance resistance FR2 is serially connected on the zero line N.
Cross-over connection has piezo-resistance VR1 between the live wire of described Temperature protection resistance FR1 and insurance resistance FR2 rear end and the zero line.
Described insurance module comprises Temperature protection resistance FR1 and insurance resistance FR2, and Temperature protection resistance FR1 and insurance resistance FR2 are connected in series on the live wire L simultaneously.
Described Switching Power Supply main circuit comprises power conversion module, rectification filtering module, output module and PWM control module, direct current behind surge restraint circuit inputs to the power conversion module and carries out the power conversion, input to then that rectification filtering module carries out rectification, filtering is exported by output module, the work of PWM control module control power conversion module.
Described Switching Power Supply main circuit also comprises output sampling module and voltage stabilizing loop protection module; the output sampling module is connected on the output module; the output sampling module is sampled to the output module out-put supply; sampled signal is exported to voltage stabilizing loop protection module, and voltage stabilizing loop protection module output control signal is given the PWM control module.
The beneficial effects of the utility model are: the surge that the utility model constitutes by Temperature protection resistance, insurance resistance, bridge rectifier and p-type filter circuit suppresses loop and can replace the general inhibition method of above-mentioned industry fully, and than the general inhibition method of industry, surge restraint circuit described in the utility model need not use devices such as piezo-resistance, thermistor, common mode inductance and X electric capacity, reduced material cost greatly, use 12W with interior power supply product on, the complete machine cost greatly reduces than traditional scheme, market competitiveness height.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the utility model embodiment one circuit theory diagrams.
Fig. 3 is the utility model embodiment two circuit theory diagrams.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1, the utility model is connected with insurance module in the mains electricity input end, bridge rectifier module and filtration module are as surge restraint circuit, civil power input back is earlier through insurance module, the bridge rectifier module is connected the insurance module rear end, in the present embodiment, the bridge rectifier module can adopt bridge rectifier, perhaps adopting diode to carry out bridge joint constitutes, after filtration module filtering, be input in the Switching Power Supply main circuit through the direct current after the bridge rectifier rectification, filtration module adopts π type filter circuit in the present embodiment, cross-over connection has capacitor C 1 and capacitor C 2 on positive power line and the negative power line, capacitor C 1 and capacitor C 2 are connected in parallel, and are connected with inductance L 1 on the power line between capacitor C 1 and the capacitor C 2.In the present embodiment; the Switching Power Supply main circuit adopts conventional switching power circuit; direct current behind surge restraint circuit inputs to the power conversion module and carries out the power variation; input to then that rectification filtering module carries out rectification, filtering is exported by output module; be connected with on the output module output sampling module to out-put supply sample, sampled signal exports to voltage stabilizing loop protection module and handles; voltage stabilizing loop protection module output control signal is given the PWM control module, by the work of PWM control module control power conversion module.
Below will the utility model is described in further detail with several physical circuit patterns:
Embodiment one: please referring to accompanying drawing 2, in the present embodiment, insurance module comprises Temperature protection resistance FR1 and insurance resistance FR2, and wherein, Temperature protection resistance FR1 is serially connected on the live wire L, and insurance resistance FR2 is serially connected on the zero line N.In the present embodiment, the anti-lightning surge index of Temperature protection resistance FR1 reaches more than the 4KV, and its in when fusing surface temperature controlled, surface temperature is set at 230 degree during fusing, when running into unusual little electric current, resistor is persistent fever no longer, and reaches 230 automatic disconnections when spending in surface temperature, and the resistance body is not rubescent, do not have any potential safety hazard.Insurance resistance FR2 is anti-lightning surge insurance resistance, and its anti-lightning surge index reaches more than the 4KV.
When producing lightning surge because of the weather reason or causing voltage jump in the electrical network because of reasons such as other industry and civilian powerful device uses, these factors of instability are added in mains circuit live wire L and zero line N end by electricity network, Temperature protection resistance FR1 in the present embodiment and insurance resistance FR2 make up the lightning surge that can resist 6KV, allow the late-class circuit steady operation, when above above 6KV as unusual thunderbolt voltage, Temperature protection resistance FR1 or insurance resistance FR2 meeting quick-break in the circuit, thus guarantee that user security uses.
Connection in the present embodiment is applicable to the use of medical class power supply, and its live wire L and zero line N end to civil power all has protection.
Embodiment two: please referring to accompanying drawing 3, in the present embodiment, insurance module also comprises Temperature protection resistance FR1 and insurance resistance FR2, and wherein, Temperature protection resistance FR1 and insurance resistance FR2 are connected in series on the live wire L simultaneously.In the present embodiment, the anti-lightning surge index of Temperature protection resistance FR1 reaches more than the 4KV, and its in when fusing surface temperature controlled, surface temperature is set at 230 degree during fusing, when running into unusual little electric current, resistor is persistent fever no longer, and reaches 230 automatic disconnections when spending in surface temperature, and the resistance body is not rubescent, do not have any potential safety hazard.Insurance resistance FR2 is anti-lightning surge insurance resistance, and its anti-lightning surge index reaches more than the 4KV.
When producing lightning surge because of the weather reason or causing voltage jump in the electrical network because of reasons such as other industry and civilian powerful device uses, these factors of instability are added in mains circuit live wire L and zero line N end by electricity network, Temperature protection resistance FR1 in the present embodiment and insurance resistance FR2 make up the lightning surge that can resist 6KV, allow the late-class circuit steady operation, when above above 6KV as unusual thunderbolt voltage, Temperature protection resistance FR1 or insurance resistance FR2 meeting quick-break in the circuit, thus guarantee that user security uses.
Connection in the present embodiment is applicable on IT, the AV series products that when the electrical network abnormal conditions occurring, disconnection live wire L end is connected with civil power.
Embodiment three: in the present embodiment, insurance module comprises Temperature protection resistance FR1, insurance resistance FR2 and piezo-resistance VR1, wherein, Temperature protection resistance FR1 is serially connected on the live wire L, insurance resistance FR2 is serially connected on the zero line N, and piezo-resistance VR1 is connected across between the live wire and zero line of Temperature protection resistance FR1 and insurance resistance FR2 rear end.In the present embodiment, the anti-lightning surge index of Temperature protection resistance FR1 reaches more than the 4KV, and its in when fusing surface temperature controlled, surface temperature is set at 230 degree during fusing, when running into unusual little electric current, resistor is persistent fever no longer, and reaches 230 automatic disconnections when spending in surface temperature, and the resistance body is not rubescent, do not have any potential safety hazard.Insurance resistance FR2 is anti-lightning surge insurance resistance, and its anti-lightning surge index reaches more than the 4KV.
When producing lightning surge because of the weather reason or causing voltage jump in the electrical network because of reasons such as other industry and civilian powerful device uses, these factors of instability are added in mains circuit live wire L and zero line N end by electricity network, Temperature protection resistance FR1 in the present embodiment and insurance resistance FR2 make up the lightning surge that can resist 6KV, allow the late-class circuit steady operation, when above above 6KV as unusual thunderbolt voltage, Temperature protection resistance FR1 or insurance resistance FR2 meeting quick-break in the circuit, thus guarantee that user security uses.
Add a piezo-resistance VR1 at Temperature protection resistance FR1 with insurance resistance FR2 back in the present embodiment; The above-mentioned two kinds of Shi Genggao of the anti-thunderbolt energy force rate of this kind connection are applicable to that the above product of thunderbolt 6KV uses.
The surge that the utility model constitutes by Temperature protection resistance, insurance resistance, bridge rectifier and p-type filter circuit suppresses loop and can replace the general inhibition method of above-mentioned industry fully, and than the general inhibition method of industry, surge restraint circuit described in the utility model need not use devices such as piezo-resistance, thermistor, common mode inductance and X electric capacity, reduced material cost greatly, use 12W with interior power supply product on, the complete machine cost greatly reduces than traditional scheme, market competitiveness height.
Claims (9)
1. simple and practical surge restraint circuit, it is characterized in that: described surge restraint circuit comprises insurance module, bridge rectifier module and filtration module, electric main input insurance module, export the bridge rectifier module to through insurance module, after the rectification of bridge rectifier module, export filtration module to, behind filtration module, export.
2. simple and practical surge restraint circuit according to claim 1 is characterized in that: described filtration module employing π type filtration module.
3. simple and practical surge restraint circuit according to claim 2, it is characterized in that: described π type filtration module comprises capacitor C 1, capacitor C 2 and inductance L 1, cross-over connection has capacitor C 1 and capacitor C 2 on positive power line and the negative power line, capacitor C 1 and capacitor C 2 are connected in parallel, and are connected with inductance L 1 on the power line between capacitor C 1 and the capacitor C 2.
4. according to claim 1 or 2 or 3 described simple and practical surge restraint circuits, it is characterized in that: described insurance module comprises Temperature protection resistance FR1 and insurance resistance FR2, Temperature protection resistance FR1 is serially connected on the live wire L, and insurance resistance FR2 is serially connected on the zero line N.
5. simple and practical surge restraint circuit according to claim 4 is characterized in that: cross-over connection has piezo-resistance VR1 between the live wire of described Temperature protection resistance FR1 and insurance resistance FR2 rear end and the zero line.
6. according to claim 1 or 2 or 3 described simple and practical surge restraint circuits, it is characterized in that: described insurance module comprises Temperature protection resistance FR1 and insurance resistance FR2, and Temperature protection resistance FR1 and insurance resistance FR2 are connected in series on the live wire L simultaneously.
7. the Switching Power Supply of any described simple and practical surge restraint circuit in an employing such as the claim 1 to 6, it is characterized in that: described Switching Power Supply comprises that external civil power exports the Switching Power Supply main circuit to behind surge restraint circuit as any described simple and practical surge restraint circuit and Switching Power Supply main circuit in the claim 1 to 6.
8. Switching Power Supply according to claim 7, it is characterized in that: described Switching Power Supply main circuit comprises power conversion module, rectification filtering module, output module and PWM control module, direct current behind surge restraint circuit inputs to the power conversion module and carries out the power conversion, input to then that rectification filtering module carries out rectification, filtering is exported by output module, the work of PWM control module control power conversion module.
9. Switching Power Supply according to claim 8; it is characterized in that: described Switching Power Supply main circuit also comprises output sampling module and voltage stabilizing loop protection module; the output sampling module is connected on the output module; the output sampling module is sampled to the output module out-put supply; sampled signal is exported to voltage stabilizing loop protection module, and voltage stabilizing loop protection module output control signal is given the PWM control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320030176 CN203205837U (en) | 2013-01-21 | 2013-01-21 | Simple and practical surge suppression circuit and switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320030176 CN203205837U (en) | 2013-01-21 | 2013-01-21 | Simple and practical surge suppression circuit and switch power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203205837U true CN203205837U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320030176 Expired - Lifetime CN203205837U (en) | 2013-01-21 | 2013-01-21 | Simple and practical surge suppression circuit and switch power supply |
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| CN (1) | CN203205837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106376138A (en) * | 2016-10-24 | 2017-02-01 | 温州益泰光电有限公司 | Improved power circuit of LED lighting lamp |
-
2013
- 2013-01-21 CN CN 201320030176 patent/CN203205837U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106376138A (en) * | 2016-10-24 | 2017-02-01 | 温州益泰光电有限公司 | Improved power circuit of LED lighting lamp |
| CN106376138B (en) * | 2016-10-24 | 2018-03-02 | 温州益泰光电有限公司 | A kind of LED illumination lamp power circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20161026 Address after: Thai Industrial Park, 518108 Guangdong city of Shenzhen province Nanshan District Xi Bai Lu Lisong Bai mang Cun sang 1 building 7 floor Patentee after: SHENZHEN MOSO POWER ELECTRONICS TECHNOLOGY Co.,Ltd. Patentee after: HUIZHOU MAOSHUO ENERGY TECHNOLOGY Co.,Ltd. Address before: Thai Industrial Park, 518108 Guangdong city of Shenzhen province Nanshan District Xi Bai Lu Lisong Bai mang Cun sang 1 building 7 floor Patentee before: SHENZHEN MOSO POWER ELECTRONICS TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |