CN2862464Y - Surge voltage suppressor - Google Patents
Surge voltage suppressor Download PDFInfo
- Publication number
- CN2862464Y CN2862464Y CN 200520067200 CN200520067200U CN2862464Y CN 2862464 Y CN2862464 Y CN 2862464Y CN 200520067200 CN200520067200 CN 200520067200 CN 200520067200 U CN200520067200 U CN 200520067200U CN 2862464 Y CN2862464 Y CN 2862464Y
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- inductance
- surging
- surge
- power source
- switch power
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Abstract
The utility model provides a surging voltage suppressor, belongs to technical field of switch power source, and generally applies to the mains power input end of A C / D C switch power source for surging voltage suppression. The switch power source consisting of surging voltage suppressor and follow-on circuit can also used as a component for other products that require suppression of surging voltage. To enhance the capability of surging voltage suppression, it is essential to enlarge the inductance of L and C wave filter, adopt difference module connection and form a double level or multi-level wave filter network. The inductance of the wave filter is not compatible with the E M C suppressing conjugation inductance. The advantage of the utility model lies in: using a circuit topology as shown in attached figure 3, an excellent surging suppressing effect is received. In order not to excessively enlarge the volume of switch power source products, the utility model also invents a new component integrating inductance and fuse into one, thus saving space occupied by the fuse.
Description
Technical field
The utility model is a kind of Surge Suppressors, belongs to the switch power technology field, generally is used for AC/DC Switching Power Supply electric main input and suppresses surge voltage.The subsequent conditioning circuit of this Surge Suppressors and Switching Power Supply is formed the Switching Power Supply product jointly; Also can be used as parts and be used for the product that other need suppress surge voltage.
Background technology
AC/DC Switching Power Supply inhibition surge voltage is used conjugation inductance (EMC that holds concurrently suppresses), capacitive filter more at present, piezo-resistance in parallel or discharge tube or Transient Suppression Diode (TVS) absorb surge voltage on electric capacity, as shown in Figure 1, though effect is to a certain degree arranged, falls down on high amplitude surge voltage.Facts have proved by the surge test of 2000V all very difficult.Market demands export to the surge impact that American-European IT product, communication products then require the anti-6000V of energy, damage to reduce thunderbolt, improve equipment dependability.
Summary of the invention
The AC/DC Switching Power Supply under the situation of work, the time have disturbing pulse to scurry into from input, these disturbing pulses often amplitude height, frequency spectrum are many at high band, superposition is on the power frequency supply of input.The disturbing pulse that these amplitudes are high promptly is " surge source " or " surge "." surge " often scurried into the differential mode form, and wherein worst situation is positive disturbing pulse superposition at the moment of 90 ° of input sine power supplies and negative interference pulse superposition in the moment of 270 ° of input sine power supplies, as shown in Figure 2.And high amplitude surge voltage can produce high amplitude surge current, and is if to disturb suppressing not enough, gently then influence the Switching Power Supply operate as normal, heavy then burn out Switching Power Supply.
The utility model is intended to make a kind of low cost, little, the high amplitude Surge Suppressors of volume, to adapt to IT product, communication products reliability requirement and outlet needs.
Analyzing the Surge Suppressors shown in the accompanying drawing 1, by the filter that conjugation inductance L, capacitor C are formed, mainly be that inductance inserts with conjugate form, and inductance value L is big inadequately, causes surge to suppress weak effect.Have only inductance to take the differential mode form to insert, inductance value is enough big, could produce enough big induction reactance attenuate high frequency disturbing pulse.To play deboost too high in the effect of capacitor C and piezo-resistance or discharge tube FV in the accompanying drawing 1, prevents the too high voltages subsequent conditioning circuit element of breaking.
But the inductance value that strengthens single inductance causes volume to increase, and only is very difficult enforcement in several watts the switchette power supply product at the power that volume restrictions is arranged.The demand in so exactly switchette power supply product market is big.
Embodiment
Come description of the drawings and explanation invention of the present utility model place below in conjunction with embodiment.
Though accompanying drawing 3 circuit these 4 inductance of L1-L4, these 4 inductance can come coiling with less skeleton, magnetic core, magnetic core usefulness high magnetic permeability, the area that takies the pcb board increase is few, but has reached the purpose that the total inductance amount increases.
If the Switching Power Supply product is not subjected to volume restrictions, can also form multistage LC filter circuit with electric capacity with the series connection of more inductance, as shown in the accompanying drawing 4, can receive better surge inhibition effect.
Take after the above-mentioned measure, this type of Switching Power Supply product has waltzed through the surge test of 6000V.
Claims (4)
1, a kind of Surge Suppressors is used for the surge voltage that Switching Power Supply suppresses input, and it is characterized in that: it is a secondary filter circuit, concrete circuit connecting form is: the civil power phase line is connected with the end of fuse FU, and the other end of FU is connected successively with inductance L 1, L3; The civil power zero line is connected successively with inductance L 2, L4; Meet a voltage suppression element FV between these 2 of the series connection points (2) of the series connection point of inductance L 1, L3 (1) and inductance L 2, L4, connect a capacitor C between another end points (3) of L3 and L4, at (4) two, form a secondary filter circuit.
2, Surge Suppressors according to claim 1, it is characterized in that: voltage suppression element FV can be piezo-resistance or discharge tube or Transient Suppression Diode (TVS).
3, Surge Suppressors according to claim 1, it is characterized in that: another end points (3), (4) of inductance L 3 and L4 also can follow-uply be connected conjugation inductance L 5; And it is after inductance L 3 and the L4 that conjugation inductance L 5 can only be connected after this secondary filter circuit.
4, Surge Suppressors is characterized in that: can also form multistage LC filter circuit, follow-up again connection conjugation inductance with electric capacity with more inductance series connection according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520067200 CN2862464Y (en) | 2005-11-11 | 2005-11-11 | Surge voltage suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520067200 CN2862464Y (en) | 2005-11-11 | 2005-11-11 | Surge voltage suppressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2862464Y true CN2862464Y (en) | 2007-01-24 |
Family
ID=37660093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520067200 Expired - Fee Related CN2862464Y (en) | 2005-11-11 | 2005-11-11 | Surge voltage suppressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2862464Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532502A (en) * | 2012-12-18 | 2014-01-22 | 深圳市友讯达科技发展有限公司 | Power line carrier power amplification device |
| CN110932250A (en) * | 2019-12-02 | 2020-03-27 | 国家电网公司西南分部 | Lightning protection circuit for communication power supply |
-
2005
- 2005-11-11 CN CN 200520067200 patent/CN2862464Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532502A (en) * | 2012-12-18 | 2014-01-22 | 深圳市友讯达科技发展有限公司 | Power line carrier power amplification device |
| CN103532502B (en) * | 2012-12-18 | 2016-12-28 | 深圳友讯达科技股份有限公司 | A kind of power line carrier power amplification device |
| CN110932250A (en) * | 2019-12-02 | 2020-03-27 | 国家电网公司西南分部 | Lightning protection circuit for communication power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Yang Daizhen Document name: Notification to Pay the Fees |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070124 Termination date: 20091211 |