CN202178566U - Series capacitor protective circuit - Google Patents
Series capacitor protective circuit Download PDFInfo
- Publication number
- CN202178566U CN202178566U CN2011203076466U CN201120307646U CN202178566U CN 202178566 U CN202178566 U CN 202178566U CN 2011203076466 U CN2011203076466 U CN 2011203076466U CN 201120307646 U CN201120307646 U CN 201120307646U CN 202178566 U CN202178566 U CN 202178566U
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- resistance
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- divider
- series capacitance
- protective circuit
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Abstract
The utility model relates to a protective circuit, and especially relates to a series capacitor protective circuit which includes two or more than two capacitors which are connected in series, a power input terminal 1, and a power switch 2. The power input terminal 1, the power switch 2, and the series capacitors are connected in series in order, and the series capacitors are connected with the ground, wherein each capacitor is connected in parallel with a resistor unit, and each resistor unit includes at least one group of parallel divider resistors, and two neighboring parallel divider resistor groups are connected in series. The series capacitor protective circuit not only solves the uneven voltage division problem of series capacitors, but also effectively avoids the risks brought by the failure of the divider resistors.
Description
Technical field
The utility model relates to a kind of protective circuit, is specifically related to a kind of series capacitance protective circuit.
Background technology
In the higher application scenario of voltage,, generally can adopt two or more capacitances in series to improve voltage endurance capability if electric capacity is withstand voltage not enough.Because the DC internal resistance of electric capacity is very high, generally in megohm level scope, each electric capacity internal resistance resistance is widely different simultaneously, has caused the unbalanced-voltage-division of actual electric capacity at different levels even even by than big-difference.And high capacitor leakage current increase, the lost of life of dividing potential drop in addition have blast maybe, have big potential safety hazard.
In order to solve above technical problem, prior art is employed in that resistance of each parallel connection takes place to avoid the uneven situation of capacitance partial pressures at different levels at the divider resistance of hundred K ohm level between electric capacity at different levels.But the possibility that this technology still exists divider resistance to lose efficacy and open a way; Promptly when any parallelly connected divider resistance with electric capacity is opened a way; The equal pressure energy power of divider resistance lost efficacy, and still existed above-mentioned described capacitance partial pressures at different levels inhomogeneous even by the risk than big-difference brought.
The utility model content
The technical problem that the utility model will solve provides a kind of series capacitance protective circuit, when solving the series capacitance unbalanced-voltage-division, and the risk of also effectively having avoided divider resistance to lose efficacy and bring simultaneously.
The technical scheme of the utility model is:
A kind of series capacitance protective circuit; Comprise several electric capacity that are connected in series, power input, mains switch more than 2 or 2; Power input, mains switch, series capacitance are connected successively, series capacitance ground connection, and wherein: electric capacity at different levels are resistance unit of parallel connection respectively; Each resistance unit comprises at least one group of parallel connection divider resistance, the series connection of every two adjacent groups parallel connection divider resistance.
Preferably, described one group of parallel connection divider resistance comprises at least two divider resistances, and is parallel with one another between the divider resistance.
In order further to protect the series capacitance circuit, preferably, also comprise supervising device, supervising device is monitored the dividing potential drop difference of electric capacity at different levels in real time.
Preferably, also comprise resistance, mains switch is parallelly connected with resistance.
Preferably, each resistance unit comprises two groups of parallel connection divider resistances, and one group of parallel connection divider resistance is organized parallelly connected divider resistance with another and connected.
Preferably, the resistance of described divider resistance equates that the Standard resistance range of divider resistance is in hundred K ohm level.
Preferably; Comprise that 2 series capacitances are first order capacitor C 1 and second level capacitor C 2, power input 1, mains switch 2, first order capacitor C 1, second level capacitor C 2 are connected successively, second level capacitor C 2 ground connection; First order capacitor C 1 parallelly connected first resistance unit 4; Capacitor C 2 parallelly connected second resistance unit, 5, the first resistance units 4 in the second level comprise two groups of parallel connection divider resistances, i.e. 4 divider resistance R1, R2, R3, R4; Second resistance unit 5 comprises two groups of parallel connection divider resistances, i.e. 4 divider resistance R5, R6, R7, R8.
Preferably, the resistance of described divider resistance is 100K Ω.
Preferably, described supervising device is a single-chip microcomputer.
The described series capacitance of the utility model is the electric capacity that is connected in series.
The group quantity of the parallelly connected divider resistance that the number quantity of the utility model series capacitance, each resistance unit comprise, the number quantity of every group of divider resistance of comprising of parallel connection divider resistance can specifically be set according to the actual requirements.
Operation principle of the utility model and advantage: the utility model adopts the mode to a plurality of divider resistances of series capacitance connection in series-parallel; When any divider resistance lost efficacy, the divider resistance uniform voltage function still existed, and the dividing potential drop of each electric capacity can not produce than big-difference; Electric capacity can not damage; Can not have potential safety hazard, in order further to protect the series capacitance circuit, the utility model also can be provided with supervising device the dividing potential drop difference condition of electric capacity at different levels is monitored in real time simultaneously; And to take emergency measures according to this dividing potential drop difference condition be disconnecting power switch, thus the risk of fundamentally having avoided the series capacitance unbalanced-voltage-division to be brought.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment 8;
Reference numeral: power input 1, mains switch 2, resistance R 0, single-chip microcomputer 3, first order capacitor C 1, second level capacitor C 2, first resistance unit 4, second resistance unit 5, divider resistance R1, R2, R3, R4, R5, R6, R7, R8.
Embodiment
Embodiment 6, a kind of series capacitance protective circuit, wherein: the resistance of described divider resistance is 100K Ω, and all the other are with embodiment 1 or embodiment 2 or embodiment 3 or embodiment 4 or embodiment 5.
Embodiment 7, a kind of series capacitance protective circuit, wherein: described supervising device is a single-chip microcomputer, all the other are with embodiment 1 or embodiment 2 or embodiment 3 or embodiment 4 or embodiment 5 or embodiment 6.
Embodiment 8, a kind of series capacitance protective circuit, wherein: comprise that 2 electric capacity that are connected in series are first order capacitor C 1 and second level capacitor C 2, power input 1, mains switch 2, single-chip microcomputer 3, power input 1, mains switch 2, first order capacitor C 1, second level capacitor C 2 are connected successively; Second level capacitor C 2 ground connection; Mains switch 2 is parallelly connected with resistance R 0, and power input voltage is 310V, and the resistance of resistance R 0 is 820 Ω; Single-chip microcomputer 3 is monitored the partial pressure value of first order capacitor C 1 and second level capacitor C 2 in real time; First order capacitor C 1 comprises first resistance unit 4, and second level capacitor C 2 comprises that second resistance unit, 5, the first resistance units 4 comprise two groups of parallel connection divider resistances; I.e. 4 divider resistance R1, R2, R3, R4; Second resistance unit 5 comprises two groups of parallel connection divider resistances, i.e. 4 divider resistance R5, R6, R7, R8, and the resistance of divider resistance R1, R2, R3, R4 and divider resistance R5, R6, R7, R8 is 100K Ω.
Further explain the operation principle of the utility model in conjunction with present embodiment 8: power input voltage is 310V; The dividing potential drop of electric capacity at different levels is 250V, and when the divider resistance of any series capacitance lost efficacy, single-chip microcomputer 3 was judged the dividing potential drop difference condition of first order capacitor C 1 with second level capacitor C 2 through the magnitude of voltage that detects DC1 and DC2; Under the normal condition; First order capacitor C 1 equates that with the partial pressure value of second level capacitor C 2 promptly the numerical value of DC2 is 1/2 of DC1 numerical value, when the divider resistance of any series capacitance lost efficacy; First order capacitor C 1 has 1/5 difference approximately with the partial pressure value of second level capacitor C 2; This difference obtains reflection at the DC1 of single-chip microcomputer 3 monitorings and the numerical value difference of DC2, thereby can real-time judge go out to have a divider resistance to have inefficacy, but this inefficacy can not cause damage to series capacitance; But, also can take the mode of disconnecting power switch 2 thoroughly to avoid the even or excessive risk of bringing of dividing potential drop difference of series capacitance unbalanced-voltage-division in order further to protect the series capacitance circuit.
The utility model is not limited to above-mentioned concrete embodiment, and it also has a lot of the variation or remodeling, but does not break away from the connotation and the scope of the utility model, all belongs to the protection range of the utility model.
Claims (10)
1. series capacitance protective circuit; Comprise several electric capacity that are connected in series, power input (1), mains switch (2) more than 2 or 2; Power input (1), mains switch (2), series capacitance are connected successively, and series capacitance ground connection is characterized in that: electric capacity at different levels are resistance unit of parallel connection respectively; Each resistance unit comprises at least one group of parallel connection divider resistance, the series connection of every two adjacent groups parallel connection divider resistance.
2. a kind of series capacitance protective circuit as claimed in claim 1 is characterized in that: described one group of parallel connection divider resistance comprises at least two divider resistances, and is parallel with one another between the divider resistance.
3. according to claim 1 or claim 2 a kind of series capacitance protective circuit, it is characterized in that: also comprise supervising device, supervising device is monitored the dividing potential drop difference of electric capacity at different levels in real time.
4. according to claim 1 or claim 2 a kind of series capacitance protective circuit, it is characterized in that: also comprise resistance (R0), mains switch (2) is parallelly connected with resistance (R0).
5. according to claim 1 or claim 2 a kind of series capacitance protective circuit, it is characterized in that: each resistance unit comprises two groups of parallel connection divider resistances, one group of parallel connection divider resistance is organized parallelly connected divider resistance with another and is connected.
6. according to claim 1 or claim 2 a kind of series capacitance protective circuit, it is characterized in that: the resistance of described divider resistance equates.
7. according to claim 1 or claim 2 a kind of series capacitance protective circuit, it is characterized in that: the Standard resistance range of divider resistance is in hundred K ohm level.
8. a kind of series capacitance protective circuit as claimed in claim 4; It is characterized in that: comprise that 2 series capacitances are first order capacitor C 1 and second level capacitor C 2, power input (1), mains switch (2), first order capacitor C 1, second level capacitor C 2 are connected successively, second level capacitor C 2 ground connection; First order capacitor C 1 parallelly connected first resistance unit (4); Second level capacitor C 2 parallelly connected second resistance units (5), first resistance unit (4) comprise two groups of parallel connections divider resistance, i.e. 4 divider resistances (R1, R2, R3, R4); Second resistance unit (5) comprises two groups of parallel connections divider resistance, i.e. 4 divider resistances (R5, R6, R7, R8).
9. like claim 1 or 2 or 8 described a kind of series capacitance protective circuits, it is characterized in that: the resistance of described divider resistance is 100K Ω.
10. a kind of series capacitance protective circuit as claimed in claim 3 is characterized in that: described supervising device is single-chip microcomputer (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203076466U CN202178566U (en) | 2011-08-22 | 2011-08-22 | Series capacitor protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203076466U CN202178566U (en) | 2011-08-22 | 2011-08-22 | Series capacitor protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202178566U true CN202178566U (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203076466U Expired - Lifetime CN202178566U (en) | 2011-08-22 | 2011-08-22 | Series capacitor protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202178566U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103093728A (en) * | 2013-01-29 | 2013-05-08 | 深圳市华星光电技术有限公司 | Light-emitting diode (LED) backlight drive circuit and liquid crystal displayer (LCD) |
| CN103311283A (en) * | 2013-06-26 | 2013-09-18 | 株洲南车时代电气股份有限公司 | Power semiconductor chip gate resistor |
| CN104426390A (en) * | 2013-08-21 | 2015-03-18 | 珠海格力电器股份有限公司 | Control circuit |
| CN106487217A (en) * | 2015-08-27 | 2017-03-08 | 中国电力科学研究院 | A kind of divider |
-
2011
- 2011-08-22 CN CN2011203076466U patent/CN202178566U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103093728A (en) * | 2013-01-29 | 2013-05-08 | 深圳市华星光电技术有限公司 | Light-emitting diode (LED) backlight drive circuit and liquid crystal displayer (LCD) |
| CN103311283A (en) * | 2013-06-26 | 2013-09-18 | 株洲南车时代电气股份有限公司 | Power semiconductor chip gate resistor |
| CN103311283B (en) * | 2013-06-26 | 2016-02-03 | 株洲南车时代电气股份有限公司 | A kind of power semiconductor chip gate resistor |
| CN104426390A (en) * | 2013-08-21 | 2015-03-18 | 珠海格力电器股份有限公司 | Control circuit |
| CN106487217A (en) * | 2015-08-27 | 2017-03-08 | 中国电力科学研究院 | A kind of divider |
| CN106487217B (en) * | 2015-08-27 | 2019-11-01 | 中国电力科学研究院 | A kind of divider |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |
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| CX01 | Expiry of patent term |