CN202840928U - Isolation type anti-interference power secondary system - Google Patents
Isolation type anti-interference power secondary system Download PDFInfo
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- CN202840928U CN202840928U CN 201220141860 CN201220141860U CN202840928U CN 202840928 U CN202840928 U CN 202840928U CN 201220141860 CN201220141860 CN 201220141860 CN 201220141860 U CN201220141860 U CN 201220141860U CN 202840928 U CN202840928 U CN 202840928U
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Abstract
The utility model discloses an isolation type anti-interference power secondary system, relating to anti-interference technology of power system. The power secondary system comprises a primary loop and a secondary loop, wherein an isolating circuit is arranged between the primary loop and the secondary loop; the isolating loop is mainly composed of a coupling capacitor to electrically isolate the primary loop from the second loop, inhibit leakage current from the primary loop to the secondary loop, and transmit power. According to the utility model, the isolating transmission circuit is formed by the capacitor, which can electrically isolating the primary loop from the secondary loop, better inhibit the leakage current from the primary loop to the secondary loop, and simultaneously improve the transmission power.
Description
Technical field
The utility model relates to the electric power system Anti-Jamming Technique, relates in particular to a kind of isolated jamproof electric power secondary system.
Background technology
Electric power secondary system is comprised of secondary cable and secondary device etc., and wherein the kind of secondary device and model are a lot, and residing running environment complex easily is subjected to external interference.The main cause that this interference forms has following several: (1) lightning current injects the interference that ground network causes; (2) the power frequency short circuit current injects the interference that ground network causes; (3) once, secondary device operates the interference that causes; (4) under the strong electric field environment, because the interference that electromagnetic field effect causes.These interference may exert an influence to the normal operation of electric power secondary system, and are light then affect the stable operation of electric power secondary system and equipment, heavy then cause protecting misoperation and cause power failure, when serious even can form larger accident.
In the prior art, usually adopt quarantine measures to come the antijamming capability of high electric power secondary system, specifically make analog quantity, input/output switching amount, digital quantity and power line etc. in secondary device and the extraneous connection line, via entering again secondary device inside after photoelectricity isolation or the isolating transformer isolation, so that common mode disturbances is inhibited, wherein: photoelectricity isolation is mainly isolated external switch amount signal and switching value output and secondary side circuit by photoelectrical coupler thus; Isolating transformer is mainly by the ac circuit isolation of dedicated transformer with first and second side.At present, electric power system adopts isolating transformer to realize the isolation of first and second side loop more, and finally realizes jamproof requirement.
Isolating transformer is simple in structure, but have certain defective, show the following aspects: there are certain leakage current loop in one, isolating transformer, and there is stray capacitance between former secondary, causes the electrical isolation that to realize ideal between the former secondary of isolating transformer; Its two, in order to satisfy the requirement of former secondary reinforced insulation, traditional isolating transformer adopts double insulation, causes volume to be difficult to miniaturization, especially the thickness aspect is difficult to do very thin; Its three because the existence of copper loss and iron loss, the through-put power of isolating transformer is difficult to be greatly improved.
The utility model content
In view of this, the utility model purpose is to provide a kind of isolated jamproof electric power secondary system, can the establishment leakage current, improve system transmissions power.
For solving above technical problem, the technical scheme that the utility model provides is: a kind of isolated jamproof electric power secondary system, comprise primary side loop and secondary side circuit, be provided with buffer circuit between described primary side loop and the described secondary side circuit, described buffer circuit mainly is made of coupling capacitance, realizing the electrical isolation of described primary side loop between the described secondary side circuit, and suppress described primary side loop to leakage current and through-put power between the described secondary side circuit.
More preferably, described primary side loop comprises primary side rectification circuit and inverter circuit successively.
More preferably, described primary side rectification circuit is the full-bridge type rectification circuit.
More preferably, described primary side loop comprises the primary side filter circuit, and described primary side filter circuit is connected between described primary side rectification circuit and the described inverter circuit.
More preferably, described primary side filter circuit is the RC filter circuit.
More preferably, described primary side loop comprises that common mode disturbances suppresses circuit, and described common mode disturbances suppresses circuit and is connected between described inverter circuit and the described buffer circuit.
More preferably, described buffer circuit comprises inductance, and described inductance is connected in series with described coupling capacitance.
More preferably, described secondary side circuit comprises the secondary side current rectifying and wave filtering circuit, and the output of described secondary side current rectifying and wave filtering circuit is connected to load.
More preferably, described secondary side flows back to the road and comprises regulating circuit, and described regulating circuit is connected between described secondary side current rectifying and wave filtering circuit and the described load.
Compared with prior art, the isolated jamproof electric power secondary system of the utility model consists of isolation and transmission circuit by electric capacity, realize the primary side loop to the electrical isolation between the secondary side circuit, suppress the primary side loop to the leakage current of secondary side circuit, also help to improve simultaneously through-put power.In addition, adopt the coupling capacitance isolation method, be convenient to the insulating requirements of the system that realizes, and can make small product size less, also be conducive to make system compacter.
Description of drawings
Fig. 1 is the circuit diagram of the isolated jamproof electric power secondary system of the utility model.
Embodiment
The core concept of the isolated jamproof electric power secondary system of the utility model is, adopt coupling capacitance to realize that the primary side loop is to the electrical isolation between the secondary side circuit, suppress the primary side loop to the leakage current between the secondary side circuit, improve the primary side loop to the through-put power between the secondary side circuit.
In order to make those skilled in the art understand better the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1, the preferred embodiment of the expression isolated jamproof electric power secondary system of the utility model (hereinafter to be referred as electric power secondary system).This electric power secondary system comprises primary side loop 100, buffer circuit 200 and secondary side circuit 300 successively, wherein:
Among the above embodiment, electric power secondary system consists of isolation and transmission circuit by electric capacity, realizes that the primary side loop to the electrical isolation between the secondary side circuit, can suppress the primary side loop to the leakage current of secondary side circuit, also helps to improve simultaneously through-put power.In addition, adopt the coupling capacitance isolation method, be convenient to the insulating requirements of the system that realizes, also can make small product size less, and be conducive to make system compacter.
Only be preferred implementation of the present utility model below, should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection range of the present utility model should be as the criterion with the claim limited range.For those skilled in the art, within not breaking away from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (9)
1. isolated jamproof electric power secondary system, comprise primary side loop and secondary side circuit, be provided with buffer circuit between described primary side loop and the described secondary side circuit, it is characterized in that, described buffer circuit mainly is made of coupling capacitance, realizing the electrical isolation of described primary side loop between the described secondary side circuit, and suppress described primary side loop to leakage current and through-put power between the described secondary side circuit.
2. isolated jamproof electric power secondary system as claimed in claim 1 is characterized in that, described primary side loop comprises primary side rectification circuit and inverter circuit successively.
3. isolated jamproof electric power secondary system as claimed in claim 2 is characterized in that, described primary side rectification circuit is the full-bridge type rectification circuit.
4. isolated jamproof electric power secondary system as claimed in claim 2 is characterized in that, described primary side loop comprises the primary side filter circuit, and described primary side filter circuit is connected between described primary side rectification circuit and the described inverter circuit.
5. isolated jamproof electric power secondary system as claimed in claim 4 is characterized in that, described primary side filter circuit is the RC filter circuit.
6. isolated jamproof electric power secondary system as claimed in claim 2 is characterized in that, described primary side loop comprises that common mode disturbances suppresses circuit, and described common mode disturbances suppresses circuit and is connected between described inverter circuit and the described buffer circuit.
7. isolated jamproof electric power secondary system as claimed in claim 1 is characterized in that, described buffer circuit comprises inductance, and described inductance is connected in series with described coupling capacitance.
8. isolated jamproof electric power secondary system as claimed in claim 1 is characterized in that, described secondary side circuit comprises the secondary side current rectifying and wave filtering circuit, and the output of described secondary side current rectifying and wave filtering circuit is connected to load.
9. isolated jamproof electric power secondary system as claimed in claim 8 is characterized in that, described secondary side flows back to the road and comprises regulating circuit, and described regulating circuit is connected between described secondary side current rectifying and wave filtering circuit and the described load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220141860 CN202840928U (en) | 2012-04-06 | 2012-04-06 | Isolation type anti-interference power secondary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220141860 CN202840928U (en) | 2012-04-06 | 2012-04-06 | Isolation type anti-interference power secondary system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202840928U true CN202840928U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220141860 Expired - Fee Related CN202840928U (en) | 2012-04-06 | 2012-04-06 | Isolation type anti-interference power secondary system |
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| CN (1) | CN202840928U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935155A (en) * | 2015-06-15 | 2015-09-23 | 山东超越数控电子有限公司 | Design method for DC-DC power ripple rejection |
| CN110471481A (en) * | 2019-09-16 | 2019-11-19 | 南京中感微电子有限公司 | A kind of high-precision pressure regulator |
-
2012
- 2012-04-06 CN CN 201220141860 patent/CN202840928U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935155A (en) * | 2015-06-15 | 2015-09-23 | 山东超越数控电子有限公司 | Design method for DC-DC power ripple rejection |
| CN104935155B (en) * | 2015-06-15 | 2017-06-20 | 山东超越数控电子有限公司 | A kind of method for designing for DC D/C power Ripple Suppressions |
| CN110471481A (en) * | 2019-09-16 | 2019-11-19 | 南京中感微电子有限公司 | A kind of high-precision pressure regulator |
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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: 20130327 Termination date: 20140406 |