CN205407230U - Converter with prevent that input lacks looks function - Google Patents
Converter with prevent that input lacks looks function Download PDFInfo
- Publication number
- CN205407230U CN205407230U CN201620139652.8U CN201620139652U CN205407230U CN 205407230 U CN205407230 U CN 205407230U CN 201620139652 U CN201620139652 U CN 201620139652U CN 205407230 U CN205407230 U CN 205407230U
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- Prior art keywords
- circuit
- phase
- input
- converter
- comparator
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- Expired - Fee Related
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Abstract
The utility model relates to a converter with prevent that input lacks looks function, including the converter body, its characterized in that this internal phase loss protection circuit that is equipped with of converter, phase loss protection circuit includes detection circuitry, buffer circuit, comparison circuit, dc bus contactor and fault indication circuit, detection circuitry is connected with the triple line, comprises three -phase input voltage reduction voltage circuit, three -phase summing circuit and voltage holding circuit, buffer circuit is connected with detection circuitry, comparison circuit includes comparator IC1, threshold voltage uref is connected to comparator IC1's an input, another input of comparator IC1 is connected buffer circuit's output. The beneficial effects are that: adopt hardware circuit to realize that protection response speed is fast, prevent that devices such as rectifier bridge, dc bus filter capacitance receive high ripple current to strike and damage for a long time, have trouble lamp, help engineering personnel investigate, solve the trouble fast.
Description
Technical field
This utility model relates to converter technology field, especially relates to a kind of with the converter preventing input phase failure function.
Background technology
Along with the fast development of production technology, converter has been increasingly becoming one of common equipment in all trades and professions and life, and it is important green energy conservation equipment；Generally; converter is all with high power load threephase motor; operationally; if run into, circuit occurs open phases of three-phase power source fault; thus causing three-phase current unbalance, fault long-term existence, converter will be damaged; even damage load below, so a lot of type of production producer pays much attention to the open-phase protection to converter and its load.
Utility model content
This utility model provides a kind of with the converter preventing input phase failure function, with the problem solving to damage converter when converter in prior art runs into open-phase fault.
This utility model is solved the technical problem that and is realized by the following technical solutions:
A kind of with the converter preventing input phase failure function; including transducer body; being provided with open-phase protection circuit in described transducer body, described open-phase protection circuit includes testing circuit, isolation circuit, comparison circuit, dc bus catalyst and failure indicating circuit；
Described testing circuit is connected with triple line, is made up of three-phase input voltage reduction voltage circuit, three-phase summing circuit and voltage hold circuit, by described three-phase input voltage reduction voltage circuit to prevent overtension from damaging subsequent device；Described voltage hold circuit keeps voltage not fall；
Described isolation circuit is connected with testing circuit, so that strong and weak electricity isolation, has the function of level conversion simultaneously；Described comparison circuit includes an input of comparator IC1, described comparator IC1 and connects threshold voltage Uref；Another input of described comparator IC1 connects the outfan of described isolation circuit；
Described dc bus catalyst is arranged on dc bus.
As preferred technical scheme, described failure indicating circuit is arranged between described comparison circuit and dc bus catalyst.
As preferred technical scheme, described dc bus catalyst includes magnetic trip coil, to realize quick disconnection, it is prevented that the devices such as rectifier bridge, dc bus filter capacitor are impacted by large ripple current for a long time and damage.
This utility model has the beneficial effect that 1) adopt hardware circuit to realize protection fast response time.
2) this circuit realiration input phase failure power-off, it is prevented that the devices such as rectifier bridge, dc bus filter capacitor are impacted by large ripple current for a long time and damage.
3) with malfunction indicator lamp, engineering staff is helped quickly to investigate, solve fault.
Accompanying drawing explanation
In order to be illustrated more clearly that embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is this utility model: the structural representation of a kind of open-phase protection circuit with the converter preventing input phase failure function.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, this utility model is expanded on further.
With reference to shown in Fig. 1; a kind of with the converter preventing input phase failure function; including transducer body, being provided with open-phase protection circuit in transducer body, open-phase protection circuit includes testing circuit, isolation circuit 4, comparison circuit 5, dc bus catalyst 6 and failure indicating circuit 7.
Wherein, testing circuit is connected with triple line, is made up of three-phase input voltage reduction voltage circuit 1, three-phase summing circuit 2 and voltage hold circuit 3, by three-phase input voltage reduction voltage circuit 1 to prevent overtension from damaging subsequent device；Voltage hold circuit 3 keeps voltage not fall；
Isolation circuit 4 is connected with testing circuit, so that strong and weak electricity isolation, has the function of level conversion simultaneously；Comparison circuit 5 includes an input of comparator IC1, comparator IC1 and connects threshold voltage Uref；Another input of comparator IC1 connects the outfan of isolation circuit 4；
Dc bus catalyst 6 is arranged on dc bus.
Failure indicating circuit 7 is arranged between comparison circuit 5 and dc bus catalyst 6.
Dc bus catalyst 6 includes magnetic trip coil, to realize quick disconnection, it is prevented that the devices such as rectifier bridge, dc bus filter capacitor are impacted by large ripple current for a long time and damage.
During use, when the intact phase time of three phase mains L1, L2, L3, power supply carries out three-phase summation after R4～R9 blood pressure lowering processes.Due to three-phase equilibrium, so now Un point voltage is only small.Voltage after current rectifying and wave filtering circuit is still only small, and now optocoupler PC1 outfan does not turn on, and comparator IC1 reverse input end is pulled to 0V, and less than the threshold voltage Uref of comparator, now the outfan of comparator IC1 is unsettled, and malfunction indicator lamp LED1 does not work.Contactor coil no current flows through, and catalyst is failure to actuate, and normally-closed contact closes, and dc bus can normal power supply.
When three phase mains L1, L2, L3 exist phase shortage, power supply carries out three-phase summation after R4～R9 blood pressure lowering processes.Due to three-phase imbalance, so now Un point voltage is very big, sinusoidal wave for 50Hz, for scarce A phase, the voltage after current rectifying and wave filtering circuit is still very big, now optocoupler PC1 outfan conducting, comparator IC1 reverse input end is 5V, more than the threshold voltage Uref of comparator, the now output head grounding (0VS) of comparator IC1, malfunction indicator lamp LED1 is bright.Catalyst obtains electric adhesive, and normally-closed contact disconnects, and cuts off the power supply that direct current is female.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model.This utility model claims scope and is defined by appending claims and equivalent thereof.
Claims (3)
1. one kind with the converter preventing input phase failure function; including transducer body; it is characterized in that, be provided with open-phase protection circuit in described transducer body, described open-phase protection circuit includes testing circuit, isolation circuit, comparison circuit, dc bus catalyst and failure indicating circuit；
Described testing circuit is connected with triple line, is made up of three-phase input voltage reduction voltage circuit, three-phase summing circuit and voltage hold circuit；
Described isolation circuit is connected with testing circuit；
Described comparison circuit includes an input of comparator IC1, described comparator IC1 and connects threshold voltage Uref；Another input of described comparator IC1 connects the outfan of described isolation circuit；
Described dc bus catalyst is arranged on dc bus.
2. a kind of with the converter preventing input phase failure function according to claim 1, it is characterised in that described failure indicating circuit is arranged between described comparison circuit and dc bus catalyst.
3. a kind of with the converter preventing input phase failure function according to claim 1, it is characterised in that described dc bus catalyst includes magnetic trip coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620139652.8U CN205407230U (en) | 2016-02-24 | 2016-02-24 | Converter with prevent that input lacks looks function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620139652.8U CN205407230U (en) | 2016-02-24 | 2016-02-24 | Converter with prevent that input lacks looks function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205407230U true CN205407230U (en) | 2016-07-27 |
Family
ID=56447074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620139652.8U Expired - Fee Related CN205407230U (en) | 2016-02-24 | 2016-02-24 | Converter with prevent that input lacks looks function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205407230U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703124A (en) * | 2019-08-05 | 2020-01-17 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | Method for detecting and protecting three-phase power supply and load phase loss |
-
2016
- 2016-02-24 CN CN201620139652.8U patent/CN205407230U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110703124A (en) * | 2019-08-05 | 2020-01-17 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | Method for detecting and protecting three-phase power supply and load phase loss |
| CN110703124B (en) * | 2019-08-05 | 2021-12-14 | 国创移动能源创新中心(江苏)有限公司 | Method for detecting and protecting three-phase power supply and load phase loss |
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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: 20160727 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |