CN202331245U - Alternating-current voltage-stabilization modular circuit - Google Patents
Alternating-current voltage-stabilization modular circuit Download PDFInfo
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- CN202331245U CN202331245U CN2011205134432U CN201120513443U CN202331245U CN 202331245 U CN202331245 U CN 202331245U CN 2011205134432 U CN2011205134432 U CN 2011205134432U CN 201120513443 U CN201120513443 U CN 201120513443U CN 202331245 U CN202331245 U CN 202331245U
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Abstract
The utility model provides an alternating-current voltage-stabilization modular circuit comprising a current-limiting resistor, a current-limiting electronic switch, a first compensation control switch, a second compensation control switch, a third compensation control switch, a fourth compensation control switch, a bypass electronic switch and a compensation transformer, wherein the first compensation control switch is connected with the third compensation control switch in series, and the second compensation control switch is connected with the fourth compensation control switch in series; a first series circuit is connected with a second series circuit in parallel, and the parallel circuit formed by the first series circuit and the second series circuit is connected with the current-limiting resistor in series; the current-limiting resistor is connected with the current-limiting electronic switch in parallel; two ends of the compensation transformer are respectively connected with a first node and a second node; and the bypass electronic switch is connected with the compensation transformer in parallel. Compared with the existing circuit, the alternating-current voltage-stabilization modular circuit has the beneficial effects of more stable bypass and current-limiting properties and is safer and more reliable; and simultaneously, the volume of electrical equipment adopting the modular circuit is smaller and more exquisite.
Description
Technical field
The utility model relates to a kind of AC voltage-stabilizing modular circuit.
Background technology
The characteristics of railway signal power supply power supply require supply module that the function of failure bypass is arranged, and promptly module under any circumstance can not have the powering-off state that self causes to take place.General processing mode is to install contactor additional in the input and output loop of power supply, and the first deenergization control contactor of supplying power again directly connects the realization bypass functionality to the input and output of power supply under the situation of power fail.
The shortcoming of doing like this is: the first, when the contactor fault, also there be the possible of outage; The second, the electric current of contactor operation is bigger, so volume is also bigger, is not easy to install in inside modules; The 3rd, there is the possibility of sintering in contacts of contactor, causes the bypass failure.
There is the possibility of shoot through in the brachium pontis compensation model of power supply on principle, if short circuit will be burnt electronic switch, therefore, something must be done to prevents that short circuit from damaging to power supply.Traditional settling mode is that directly resistance of series connection prevents the generation of big electric current in the inside, loop.Limited electric current though do like this, following shortcoming has been arranged: the first, resistance can consume very big power and cause overall efficiency to descend, and simultaneously, resistance gives out a large amount of heat energy, causes the rising of environment temperature; The second, because it is different under different compensating coefficients, to flow through the electric current of resistance, the pressure drop that on resistance, produces is different, causes the instability of bucking voltage, and time is lacked for a long time, and the output voltage of power supply is difficult to stable.
Summary of the invention
The purpose of the utility model provides a kind of AC voltage-stabilizing modular circuit, and the bypass characteristic of this circuit and cut-off current characteristics are than existing circuit safety and reliability.
The technical scheme of the utility model is: a kind of AC voltage-stabilizing modular circuit; Comprise current-limiting resistance, current limliting electronic switch, the first compensation CS, the second compensation CS, the 3rd compensation CS, the 4th compensation CS, bypass electronic switch and compensator transformer; The first compensation CS and the 3rd compensation CS are connected into first series circuit; Be provided with first node between the first compensation CS and the 3rd compensation CS; The second compensation CS and the 4th compensation CS are connected into second series circuit; Be provided with Section Point between the second compensation CS and the 4th compensation CS, first series circuit is connected with current-limiting resistance with the parallel connection of second series circuit and this parallel circuit, and current-limiting resistance is parallelly connected with the current limliting electronic switch; The compensator transformer two ends are connected with first node, Section Point respectively, and the bypass electronic switch is parallelly connected with compensator transformer.
The advantage that the utlity model has with good effect is: compare with available circuit, the bypass characteristic and the cut-off current characteristics of the utility model are more stable, more safe and reliable, and simultaneously, the electrical equipment volume of using this circuit is smaller and more exquisite.
Description of drawings
Fig. 1 is the circuit theory synoptic diagram of the utility model.
Among the figure:
KX: the current limliting electronic switch, KP: the bypass electronic switch, B: compensator transformer, R: current-limiting resistance,
K1: the first compensation CS, K2: the second compensation CS, K3: the 3rd compensation CS,
K4: the 4th compensation CS, a: first node, b: Section Point.
Embodiment
For further understanding summary of the invention, characteristics and the effect of the utility model, special case is lifted following instance and is described with reference to the accompanying drawings as follows:
As shown in Figure 1; The utility model is a kind of AC voltage-stabilizing modular circuit; Comprise current-limiting resistance R, current limliting electronic switch KX, the first compensation CS K1, the second compensation CS K2, the 3rd compensation CS K3, the 4th compensation CS K4, bypass electronic switch KP and compensator transformer B; The first compensation CS K1 and the 3rd compensation CS K3 are connected into first series circuit; Be provided with first node a between the first compensation CS K1 and the 3rd compensation CS K3, the second compensation CS K2 and the 4th compensation CS K4 are connected into second series circuit, are provided with Section Point b between the second compensation CS K2 and the 4th compensation CS K4; First series circuit is connected with current-limiting resistance R with the parallel connection of second series circuit and this parallel circuit; Current-limiting resistance R is parallelly connected with current limliting electronic switch KX, and compensator transformer B two ends are connected with first node a, Section Point b respectively, and bypass electronic switch KP is parallelly connected with compensator transformer B.
The principle of work of present embodiment is following:
(1) bypass characteristic: what the utility model circuit used is the principle of transformer secondary bypass.With compensator transformer B second short circuit, at this moment bucking voltage is zero, has realized the direct connection of power supply input and output when power fail.The characteristics of doing like this are: the first, even the control failure, power supply also can be in the state of direct power supply, can not cut off the power supply, because the major loop of module for power supply does not break off; The second, operating current is little, and transformer has become mutual inductor on principle in compensator transformer B second short circuit, and the electric current that induction produces is very little, can use relay operation, and is more safe and reliable.The volume ratio contactor of relay is much smaller, is convenient to install.
(2) cut-off current characteristics: the utility model circuit utilizes the principle of electronic load; Current limliting electronic switch KX of parallel connection falls current-limiting resistance R with current limliting electronic switch KX short circuit when the power supply stable state on current-limiting resistance R, simultaneously the electric current that flows through current limliting electronic switch KX is detected; When finding that electric current is excessive; KX turns off with the current limliting electronic switch, and current-limiting resistance R adds the rising that entry loop limits electric current, plays the purpose of holding circuit.
More than the embodiment of the utility model is specified, but said content is merely the preferred embodiment of the utility model, can not be considered to be used to limit the practical range of the utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the utility model.
Claims (1)
1. AC voltage-stabilizing modular circuit; It is characterized in that: comprise current-limiting resistance, current limliting electronic switch, the first compensation CS, the second compensation CS, the 3rd compensation CS, the 4th compensation CS, bypass electronic switch and compensator transformer; The first compensation CS and the 3rd compensation CS are connected into first series circuit; Be provided with first node between the first compensation CS and the 3rd compensation CS; The second compensation CS and the 4th compensation CS are connected into second series circuit; Be provided with Section Point between the second compensation CS and the 4th compensation CS, first series circuit is connected with current-limiting resistance with the parallel connection of second series circuit and this parallel circuit, and current-limiting resistance is parallelly connected with the current limliting electronic switch; The compensator transformer two ends are connected with first node, Section Point respectively, and the bypass electronic switch is parallelly connected with compensator transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205134432U CN202331245U (en) | 2011-12-08 | 2011-12-08 | Alternating-current voltage-stabilization modular circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205134432U CN202331245U (en) | 2011-12-08 | 2011-12-08 | Alternating-current voltage-stabilization modular circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202331245U true CN202331245U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205134432U Expired - Fee Related CN202331245U (en) | 2011-12-08 | 2011-12-08 | Alternating-current voltage-stabilization modular circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202331245U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720554A (en) * | 2014-12-05 | 2016-06-29 | 台达电子工业股份有限公司 | Overvoltage protection device and operation method thereof |
| CN112379305A (en) * | 2020-10-29 | 2021-02-19 | 中车大连电力牵引研发中心有限公司 | Grounding detection circuit of traction converter and control method thereof |
-
2011
- 2011-12-08 CN CN2011205134432U patent/CN202331245U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720554A (en) * | 2014-12-05 | 2016-06-29 | 台达电子工业股份有限公司 | Overvoltage protection device and operation method thereof |
| CN112379305A (en) * | 2020-10-29 | 2021-02-19 | 中车大连电力牵引研发中心有限公司 | Grounding detection circuit of traction converter and control method thereof |
| CN112379305B (en) * | 2020-10-29 | 2024-04-19 | 中车大连电力牵引研发中心有限公司 | Ground detection circuit of traction converter and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20131208 |