CN201966591U - Arcing protection circuit of inverter - Google Patents
Arcing protection circuit of inverter Download PDFInfo
- Publication number
- CN201966591U CN201966591U CN2011200056244U CN201120005624U CN201966591U CN 201966591 U CN201966591 U CN 201966591U CN 2011200056244 U CN2011200056244 U CN 2011200056244U CN 201120005624 U CN201120005624 U CN 201120005624U CN 201966591 U CN201966591 U CN 201966591U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- diode
- circuit
- resistance
- arcing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Inverter Devices (AREA)
Abstract
The utility model provides an arcing protection circuit of an inverter. The arcing protection circuit comprises a transformer, a voltage dividing circuit and a rectifying and filtering circuit, wherein a secondary side of the transformer is connected with the voltage dividing circuit to divide high-grade voltage; then output voltage is obtained through the rectifying and filtering circuit; and the arcing protection circuit is characterized in that: the voltage dividing circuit consists of a capacitor C1, a resistor R2, a resistor R4 and a capacitor C3 which are connected with one another in series in sequence. In the utility model, through the improvement of the circuit, when arcing occurs, impedance of the R2 and R4 is not influenced by amplitude of arcing frequency, arcing voltage generates voltage drop on the R2 or R4 and peak voltage on the R2 or R4 is rectified through D3 or D4, so that VS1 or VS2 voltage greatly changes, meanwhile, VS1 or VS2 is transmitted into a singlechip, and an arcing signal is judged for a plurality of times by the singlechip so as to perform protection.
Description
Technical field
The utility model relates to the inverter technology field, relates in particular to a kind of inverter arcing protective circuit.
Background technology
At present; inverter arcing circuit all is by sending in the chip after the filtering of capacitance partial pressure sampling diode rectification; after the variation that detects voltage, protect; as shown in Figure 1 and Figure 2; among Fig. 1 after inverter work C1; C2 obtains voltage VS1, VS2 by D3, D4, C5, C6 rectifying and wave-filtering respectively and sends into then in the chip HV+ dividing potential drop (C3, C4 are to the HV-dividing potential drop), and this circuit can only satisfy safety requirements.During the resistance shorted to earth that is HV+ or HV-by 2K, VS1 or VS2 change in voltage could be protected greatly, and other is as the inverter transformer stitch; when high-tension terminal stitch, stitch rosin joint that high-voltage capacitance stitch etc. links to each other with high pressure, power supply can not be protected; be in the arcing state for a long time, have potential safety hazard.
Fig. 2 is on the basis of Fig. 1, during at the stitch rosin joint that links to each other with high pressure in order to satisfy the improvement that the arcing protection is done.Its operation principle: when the inverter operate as normal, because 180 ° of HV+ and HV-equal and opposite in direction phase differences, the VA point voltage is 0 or very low; When the frequency of arcing simultaneously was very low when arcing occurring, HV+ and the unequal C3 of HV-voltage went up and produce pressure drop, and the VA point voltage raises,, send into chip, the inverter protection; This circuit shortcoming: when the arcing frequency was very high, the arcing signal was by C1, C2 dividing potential drop, and unequal signal flows into C3; but because arcing frequency height; less this arcing signal of capacitive reactance on the C3 is switched to ground by C3, and the VA point voltage can not raise, and does not change when promptly sending into signal in the chip and operate as normal; chip can't be judged; thereby can not protect, in like manner the C2 among Fig. 1, C4 also can switch to ground, VS1 to arcing frequency higher signal; VS2 voltage can not change, and can't judge the arcing protection yet.
The utility model content
The purpose of this utility model is to provide a kind of inverter arcing protective circuit.
The utility model purpose is achieved through the following technical solutions.
A kind of inverter arcing protective circuit comprises: transformer, bleeder circuit, current rectifying and wave filtering circuit, and the transformer secondary connects bleeder circuit, to high step voltage (HV+, HV-) dividing potential drop, after the arrangement filter circuit obtains output voltage; Described bleeder circuit is made up of capacitor C 1, resistance R 2, resistance R 4 and the capacitor C 3 of series connection successively.
Preferably, described current rectifying and wave filtering circuit comprises: diode D3, diode D4, capacitor C 5 and capacitor C 6, the anode of diode D3 connects the mid point of capacitor C 1 and resistance R 2, its negative electrode connects output voltage first end, the anode of diode D4 connects the mid point of capacitor C 3 and resistance R 4, its negative electrode connects output voltage second end, capacitor C 5 be connected in parallel on diode D3 and diode D4 negative electrode two ends after capacitor C 6 is connected.
Preferably, also comprise diode D1 and diode D2, the anode of described diode D1 and diode D2 links to each other, and its negative pole is connected in parallel on resistance R 2 and resistance R 4 two ends, the neutral earthing of resistance R 2 and resistance R 4.
A kind of inverter arcing protective circuit comprises: transformer, bleeder circuit, current rectifying and wave filtering circuit, and the transformer secondary connects bleeder circuit, to high step voltage (HV+, HV-) dividing potential drop, after the arrangement filter circuit obtains output voltage; Described bleeder circuit comprises capacitor C 1, capacitor C 2 and resistance R 3, capacitor C 1 and the secondary that is connected in parallel on transformer after capacitor C 2 is connected, and its mid point links to each other with an end of resistance R 3, the other end ground connection of resistance R 3.
Preferably, described current rectifying and wave filtering circuit 401 comprises: diode D2, and capacitor C 4, the anode of diode D2 connect the mid point of capacitor C 1 and capacitor C 2, and its negative electrode meets output voltage V A, the negative electrode of a terminating diode D2 of capacitor C 4, other end ground connection.
Preferably, also comprise diode D1, its plus earth, diode D1 negative electrode links to each other with the anode of diode D2.
The utility model embodiment compared with prior art, beneficial effect is: the utility model improves by foregoing circuit; When arcing occurring; because the impedance of R2, R4 is the influence of tension radian frequency height not; when arcing occurring; arcing voltage passes through D3, D4 to the crest voltage rectification on R2 or the R4 in generation pressure drop on R2 or the R4; thereby VS1 or VS2 change in voltage are bigger; simultaneously VS1, VS2 are sent in the single-chip microcomputer, thereby single-chip microcomputer is repeatedly judged protection to this arcing signal.
Description of drawings
Fig. 1, Fig. 2 are existing inverter arcing circuit diagrams;
Fig. 3 is the utility model first embodiment circuit diagram;
Fig. 4 is the utility model second embodiment circuit diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also shown in Figure 3ly, transformer T1A secondary connects bleeder circuit 302, to high step voltage (HV+, HV-) dividing potential drop, after arrangement filter circuit 301 obtains output voltage V S1, VS2, output voltage V S1, VS2 is connect single-chip microcomputer.Bleeder circuit 302 is made up of capacitor C 1, resistance R 2, resistance R 4 and the capacitor C 3 of series connection successively, current rectifying and wave filtering circuit 301 comprises: diode D3, diode D4, capacitor C 5 and capacitor C 6, the anode of diode D3 connects the mid point of capacitor C 1 and resistance R 2, its negative electrode meets output voltage V S1, the anode of diode D4 connects the mid point of capacitor C 3 and resistance R 4, its negative electrode meets output voltage V S2, capacitor C 5 be connected in parallel on diode D3 and diode D4 negative electrode two ends after capacitor C 6 is connected.
Wherein, also comprise diode D1 and diode D2 that anode links to each other, its negative pole is connected in parallel on resistance R 2 and resistance R 4 two ends, the neutral earthing of resistance R 2 and resistance R 4.
Fig. 3 is on the basis of Fig. 1, by capacitor C 2, C4 are modified to resistance R 2, R4; When arcing occurring; because the impedance of R2, R4 is the influence of tension radian frequency height not; arcing voltage passes through D3, D4 to the crest voltage rectification on R2 or the R4 in generation pressure drop on R2 or the R4 when arcing occurring; thereby VS1 or VS2 change in voltage are bigger; simultaneously VS1, VS2 are sent in the single-chip microcomputer, thereby single-chip microcomputer is repeatedly judged protection to this arcing signal.
See also shown in Figure 4ly, transformer T1A secondary connects bleeder circuit 402, and to high step voltage (HV+, HV-) dividing potential drop, after arrangement filter circuit 401 obtains output voltage V A, A connects single-chip microcomputer with output voltage V.Bleeder circuit 402 comprises: capacitor C 1, capacitor C 2, resistance R 3, current rectifying and wave filtering circuit 401 comprises: diode D2, and capacitor C 4, capacitor C 1 and the secondary that is connected in parallel on transformer T1A after capacitor C 2 is connected, its mid point links to each other with an end of resistance R 3, the other end ground connection of resistance R 3; The anode of diode D2 connects the mid point of capacitor C 1 and capacitor C 2, and its negative electrode meets output voltage V A, the negative electrode of a terminating diode D2 of capacitor C 4, other end ground connection.
Wherein, also comprise diode D1, its plus earth, negative electrode links to each other with the anode of diode D2.
In like manner, on the basis of Fig. 2, make capacitor C 3 into resistance R 3.When arcing occurring; because the impedance of R3 is the influence of tension radian frequency height not; when arcing occurring arcing voltage produce on the R3 pressure drop by D2 to the crest voltage rectification on the R3; thereby the VA change in voltage is bigger; simultaneously VA is sent in the single-chip microcomputer, thereby single-chip microcomputer is repeatedly judged protection to this arcing signal.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. inverter arcing protective circuit comprises: transformer, bleeder circuit, current rectifying and wave filtering circuit, and the transformer secondary connects bleeder circuit, to high step voltage (HV+, HV-) dividing potential drop, after the arrangement filter circuit obtains output voltage; It is characterized in that described bleeder circuit is made up of capacitor C 1, resistance R 2, resistance R 4 and the capacitor C 3 of series connection successively.
2. inverter arcing protective circuit as claimed in claim 1; it is characterized in that; described current rectifying and wave filtering circuit comprises: diode D3, diode D4, capacitor C 5 and capacitor C 6; the anode of diode D3 connects the mid point of capacitor C 1 and resistance R 2; its negative electrode connects output voltage first end; the anode of diode D4 connects the mid point of capacitor C 3 and resistance R 4, and its negative electrode connects output voltage second end, capacitor C 5 be connected in parallel on diode D3 and diode D4 negative electrode two ends after capacitor C 6 is connected.
3. inverter arcing protective circuit as claimed in claim 2; it is characterized in that, also comprise diode D1 and diode D2, the anode of described diode D1 and diode D2 links to each other; its negative pole is connected in parallel on resistance R 2 and resistance R 4 two ends, the neutral earthing of resistance R 2 and resistance R 4.
4. inverter arcing protective circuit comprises: transformer, bleeder circuit, current rectifying and wave filtering circuit, and the transformer secondary connects bleeder circuit, to high step voltage (HV+, HV-) dividing potential drop, after the arrangement filter circuit obtains output voltage; It is characterized in that described bleeder circuit comprises capacitor C 1, capacitor C 2 and resistance R 3, capacitor C 1 and the secondary that is connected in parallel on transformer after capacitor C 2 is connected, its mid point links to each other with an end of resistance R 3, the other end ground connection of resistance R 3.
5. inverter arcing protective circuit as claimed in claim 4; it is characterized in that; described current rectifying and wave filtering circuit 401 comprises: diode D2, and capacitor C 4; the anode of diode D2 connects the mid point of capacitor C 1 and capacitor C 2; its negative electrode meets output voltage V A; the negative electrode of one terminating diode D2 of capacitor C 4, other end ground connection.
6. inverter arcing protective circuit as claimed in claim 5 is characterized in that, also comprises diode D1, its plus earth, and diode D1 negative electrode links to each other with the anode of diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200056244U CN201966591U (en) | 2011-01-10 | 2011-01-10 | Arcing protection circuit of inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200056244U CN201966591U (en) | 2011-01-10 | 2011-01-10 | Arcing protection circuit of inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201966591U true CN201966591U (en) | 2011-09-07 |
Family
ID=44529145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200056244U Expired - Fee Related CN201966591U (en) | 2011-01-10 | 2011-01-10 | Arcing protection circuit of inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201966591U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427215A (en) * | 2011-10-25 | 2012-04-25 | 深圳麦格米特电气股份有限公司 | High-voltage arc discharge protective circuit |
| CN103401222A (en) * | 2013-07-09 | 2013-11-20 | 惠州三华工业有限公司 | LCD (Liquid Crystal Display) backlight inverter power supply high voltage terminal arc discharge protection circuit |
| CN103587482A (en) * | 2013-11-15 | 2014-02-19 | 柳州铁道职业技术学院 | Automobile integrated circuit protector capable of stabilizing voltage smoothly |
-
2011
- 2011-01-10 CN CN2011200056244U patent/CN201966591U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427215A (en) * | 2011-10-25 | 2012-04-25 | 深圳麦格米特电气股份有限公司 | High-voltage arc discharge protective circuit |
| CN102427215B (en) * | 2011-10-25 | 2014-04-30 | 深圳麦格米特电气股份有限公司 | High-voltage arc discharge protective circuit |
| CN103401222A (en) * | 2013-07-09 | 2013-11-20 | 惠州三华工业有限公司 | LCD (Liquid Crystal Display) backlight inverter power supply high voltage terminal arc discharge protection circuit |
| CN103401222B (en) * | 2013-07-09 | 2016-03-09 | 惠州三华工业有限公司 | A kind of LCD backlight inverter high-pressure side arc discharge protective circuit |
| CN103587482A (en) * | 2013-11-15 | 2014-02-19 | 柳州铁道职业技术学院 | Automobile integrated circuit protector capable of stabilizing voltage smoothly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102215035B (en) | A kind of isolation of the electric main in conjunction with low-voltage powerline carrier communication signal coupling zero cross detection circuit | |
| CN203537225U (en) | Novel antisurge constant-current switching power supply | |
| CN104104216A (en) | Switch power source filtering circuit | |
| CN104167724B (en) | A kind of isolation type bidirectional signal of communication lightning protection device | |
| CN201966591U (en) | Arcing protection circuit of inverter | |
| CN103872755A (en) | Double power supply seamless switching circuit | |
| CN203933382U (en) | A kind of APFC of tape jam measuring ability | |
| CN107749672A (en) | Collection system for energy conversion | |
| CN201623644U (en) | High-voltage surge resisting switch power source | |
| CN204967234U (en) | Multi -functional residual current operated circuit breaker circuit | |
| CN209217940U (en) | A kind of passive metal-oxide-semiconductor safe driving circuit of isolating transformer centre cap | |
| CN103997199A (en) | Active power factor correction circuit with fault detection function | |
| CN201572991U (en) | Welding gun high-voltage isolating circuit used in argon arc welding | |
| CN104216449B (en) | A kind of controllability alternating current steady voltage plug | |
| CN204258274U (en) | A kind of overvoltage of wide input voltage range Switching Power Supply and under-voltage protecting circuit | |
| CN103353566B (en) | Battery for mimic channel equipment testing circuit in place | |
| CN203595790U (en) | Passive switch isolation detection apparatus | |
| CN202395667U (en) | Switch power supply circuit with small voltage output ripple | |
| CN102063872A (en) | LCD backlight power circuit with high-voltage short-circuit protection | |
| CN204122942U (en) | Anti-High-frequency Interference two-stage isolation trigger control circuit | |
| CN103762864A (en) | Multi-circuit high-voltage isolation power supply for series connection of semiconductor switches | |
| CN107317489A (en) | A kind of threephase switch power supply and its over-pressed protection circuit and over-pressed means of defence | |
| CN201975988U (en) | Intrinsic safety power supply spark suppression circuit for mine | |
| CN206977324U (en) | Power circuit for low-voltage circuit breaker | |
| CN202110224U (en) | Joint voltage experiment tester |
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 |
Granted publication date: 20110907 Termination date: 20200110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |