CN103368150A - Three-phase power switching interlocking protection circuit - Google Patents
Three-phase power switching interlocking protection circuit Download PDFInfo
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- CN103368150A CN103368150A CN2012100837356A CN201210083735A CN103368150A CN 103368150 A CN103368150 A CN 103368150A CN 2012100837356 A CN2012100837356 A CN 2012100837356A CN 201210083735 A CN201210083735 A CN 201210083735A CN 103368150 A CN103368150 A CN 103368150A
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Abstract
The invention provides a three-phase power switching interlocking protection circuit. The protection circuit comprises a logic circuit (1) and a control circuit (2) connected with output ends of the logic circuit. The output ends of the logic circuit include three single-phase power output ends (11), a switching-off output end (12) and a switching-on output end (13), wherein the three single-phase power output ends (11) are respectively connected with three single-phase power input ends (11) of the control circuit, the switching-off output end is connected with a switching-off control end of the control circuit, and the switching-on output end is connected with a switching-on control end of the control circuit. Through the design in which the logic circuit and the control circuit are connected, strict control is carried out logically to enable power of only one of the three phases to be output as working voltage at any time and to enable either a switching-off action or a switching-on action to be performed at the same time. Compared with an existing circuit, the three-phase power switching interlocking protection circuit is higher in stability, much lower in cost and much smaller in size.
Description
Technical field
The present invention relates to a kind of three-phase electricity and switch interlock protection circuit, relate in particular to and a kind ofly logically stop to choose simultaneously the possible three-phase electricity of heterogeneous electricity to switch interlock protection circuit.
Background technology
Switching in the three-phase alternating current supply process of three-phase alternating current is a requisite link; its significance level is self-evident; in whole alternating current supply process; often understand because some interference or circuit question break down; will cause so wherein one mutually or the two-phase electricity the abnormal problem of voltage appears; can't satisfy the demand of base station equipment; so just need a kind of switching device to carry out mutual switching between the three-phase electricity; guarantee a certain mutually when electricity breaks down; can in time switch to going up mutually of normal operation, thereby not affect the normal power supply of circuit.
The at present switching of three-phase alternating current all adopts priority adhesive, the disjunction of different relays to finish, and switches reliably in order to guarantee three-phase electricity, and three-phase mutually can not short circuit between electricity simultaneously, needs to increase a large amount of testing circuits and finishes between phase and phase interlocking.The input that has just strengthened cost like this, a large amount of testing circuits have increased the complicated property of circuit simultaneously, if testing circuit goes wrong, then can affect the effect that circuit switches, even can occur short circuit occurring between phase and phase, namely phase voltage becomes 380V, causes the accident.
So just be badly in need of a kind of single-phase voltage that can only allow at one time and power, and solve the deficiencies in the prior art in the high circuit design of switching phase time stability.
Summary of the invention
In order to solve the problems of the technologies described above, to the invention provides a kind of switch phase voltage time stability three-phase electricity high and that logically strictly control single phase power supply and switch interlock protection circuit.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of three-phase electricity is switched interlock protection circuit; this protective circuit comprises logical circuit and the control circuit that is connected with logic circuit output end; described logic circuit output end comprises three single-phase electricity outputs and separating brake output and combined floodgate output; three single-phase electricity outputs are connected respectively three single-phase electricity inputs and are connected with control circuit; the separating brake output is connected the separating brake control end and is connected with control circuit; the combined floodgate output is connected the combined floodgate control end and is connected with control circuit; described three single-phase electricity outputs can only have an output that Voltage-output is arranged at one time, and separating brake output and separating brake output can only have an output output effectively at one time.
As a further improvement on the present invention, described logical circuit decoder module, the output of decoder module by be connected with driver module again after level switch module is connected, described driver module comprises three single-phase electricity outputs and separating brake output and combined floodgate output.
As a further improvement on the present invention, described decoder module comprises at least two 2 lines-4 line decoders, and described level switch module comprises at least five not gates, and described driver module comprises a darlington transistor array driver element.
As a further improvement on the present invention, described control circuit comprises single-phase electricity control module, separating brake control module and switch-on controlling module, and the input of described separating brake control module and switch-on controlling module is connected in parallel to the output of single-phase electricity control module.
As a further improvement on the present invention, three of described control circuit single-phase electricity inputs are provided with an electronic relay respectively.
As a further improvement on the present invention, three of described control circuit single-phase electricity inputs also are respectively arranged with safeties.
The present invention compared with prior art has following beneficial effect:
Three-phase electricity provided by the invention is switched the design that interlock protection circuit utilizes logical circuit to be connected with control circuit; logically the arbitrary moment three-phase of strict control only has one to export as operating voltage; the strict same time of control only can be opened separating brake action or feed motion simultaneously; have more stability than available circuit, greatly reduce simultaneously cost and volume.
Description of drawings
Fig. 1 is logical circuitry of the present invention;
Fig. 2 is control circuit figure of the present invention.
Embodiment
The present invention will be further elaborated below by embodiment:
A kind of three-phase electricity that present embodiment provides is switched interlock protection circuit; the control circuit 2 that this protective circuit comprises logical circuit 1 and is connected with logic circuit output end; described logic circuit output end comprises three single-phase electricity outputs 11 and separating brake output 12 and combined floodgate output 13; three single-phase electricity outputs are connected respectively three single-phase electricity inputs and are connected with control circuit; the separating brake output is connected the separating brake control end and is connected with control circuit; the combined floodgate output is connected the combined floodgate control end and is connected with control circuit; described three single-phase electricity outputs can only have an output that Voltage-output is arranged at one time, and separating brake output and separating brake output can only have an output output effectively at one time.
Described logical circuit comprises decoder module 14, and the output of decoder module is connected connection after the connection again by being connected with level switch module with driver module, and described driver module comprises three single-phase electricity outputs and separating brake output and combined floodgate output.
Described decoder module comprises two 2 lines-4 line decoders, and described level switch module comprises five not gates, and described driver module comprises a darlington transistor array driver element.
Described control circuit comprises single-phase electricity control module 21, separating brake control module 22 and switch-on controlling module 23, and the input of described separating brake control module and switch-on controlling module is connected in parallel to the output of single-phase electricity control module.
Three single-phase electricity inputs of described control circuit are provided with an electronic relay 211 respectively, also are respectively arranged with safeties 212.
The split type automatic reclosing separating brake of three-phase, feed motion are finished by shunt release and ac synchronous motor respectively, by the adhesive of logical circuit control relay, then control the performer motion.What note on the circuit design is that these two kinds of performance elements all adopt the power supply of 220V phase voltage, in order to guarantee that phase shortage can work, when starting the divide-shut brake action, must judge that according to the voltage sample value three-phase electricity has or not open-phase fault on earth in real time, can switch timely mutually electricity of use any according to result of determination.And can there be the risk of line voltage short circuit in the switching of three-phase electricity, that is to say if control circuit occurrence logic fault or hardware fault, open simultaneously the relay of two-phase, can form the short-circuit voltage of 380V between this two-phase electricity, must guarantee the interlocking of commutation circuit at circuit, stop the generation of this phenomenon.
Logical circuit is as shown in Figure 1: utilize the output mutual exclusion characteristic of 74HC139 decoding circuit, SE0, SE1, SE2 output control relay select any one of three-phase electricity as the work power supply.Behind the system initialization, the output of SE0, SE1, SE2 acquiescence is height, and work this moment does not have 220V work power supply, only have initialization to finish after single-chip microcomputer output CS0 might select by A0, A1 just that three-phase is arbitrary to be exported as operating voltage.From hardware, in logic stopped to choose simultaneously heterogeneous may, in like manner, separating brake, two actions of closing a floodgate can not start simultaneously, MOTOR, the output of TRIP two-way are respectively applied to control motor and close a floodgate and the release separating brake.
Control circuit is as shown in Figure 2: in order to prevent failure of chip, at the output of relay, serial connection enters 1A fuse (F4, F5, F6) respectively, prevents just in case printed board is burnt in the three-phase wire short circuit that above-mentioned commutation circuit caused after losing efficacy.
The three-phase electricity that present embodiment provides is switched interlock protection circuit and is adopted low-down cost, has realized the interlock protection when three-phase electricity is switched in very little volume.
Although be the example purpose, preferred implementation of the present invention is disclosed, but those of ordinary skill in the art will recognize, in the situation that do not break away from by the disclosed scope and spirit of the present invention of appending claims, various improvement, increase and replacement are possible.
Claims (6)
1. a three-phase electricity is switched interlock protection circuit; it is characterized in that: the control circuit (2) that this protective circuit comprises logical circuit (1) and is connected with logic circuit output end; described logic circuit output end comprises three single-phase electricity outputs (11) and separating brake output (12) and combined floodgate output (13); three single-phase electricity outputs are connected respectively three single-phase electricity inputs and are connected with control circuit; the separating brake output is connected the separating brake control end and is connected with control circuit; the combined floodgate output is connected the combined floodgate control end and is connected with control circuit; described three single-phase electricity outputs can only have an output that Voltage-output is arranged at one time, and separating brake output and separating brake output can only have an output output effectively at one time.
2. three-phase electricity according to claim 1 is switched interlock protection circuit; it is characterized in that: described logical circuit comprises decoder module (14); the output of decoder module is by being connected 15 with level switch module) be connected 16 with driver module again after connecting) connection, described driver module comprises three single-phase electricity outputs and separating brake output and combined floodgate output.
3. three-phase electricity according to claim 2 is switched interlock protection circuit; it is characterized in that: described decoder module comprises at least two 2 lines-4 line decoders; described level switch module comprises at least five not gates, and described driver module comprises a darlington transistor array driver element.
4. three-phase electricity according to claim 1 is switched interlock protection circuit; it is characterized in that: described control circuit comprises single-phase electricity control module (21), separating brake control module (22) and switch-on controlling module (23), and the input of described separating brake control module and switch-on controlling module is connected in parallel to the output of single-phase electricity control module.
5. three-phase electricity according to claim 1 is switched interlock protection circuit, and it is characterized in that: three single-phase electricity inputs of described control circuit are provided with an electronic relay (211) respectively.
6. three-phase electricity according to claim 4 is switched interlock protection circuit, and it is characterized in that: three single-phase electricity inputs of described control circuit also are respectively arranged with safeties (212).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210083735.6A CN103368150B (en) | 2012-03-27 | 2012-03-27 | Three-phase electricity switches interlock protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210083735.6A CN103368150B (en) | 2012-03-27 | 2012-03-27 | Three-phase electricity switches interlock protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103368150A true CN103368150A (en) | 2013-10-23 |
| CN103368150B CN103368150B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210083735.6A Expired - Fee Related CN103368150B (en) | 2012-03-27 | 2012-03-27 | Three-phase electricity switches interlock protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683223A (en) * | 2013-11-12 | 2014-03-26 | 航天科工深圳（集团）有限公司 | Circuit protection system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030057778A1 (en) * | 2001-09-25 | 2003-03-27 | George Ai | Multiple DC control for single power supply |
| CN101447739A (en) * | 2007-11-27 | 2009-06-03 | 鸿富锦精密工业（深圳）有限公司 | Three-phase AC power switching circuit |
| CN101854062A (en) * | 2010-07-01 | 2010-10-06 | 山东卓尔电气有限公司 | Automatic three-phase switching method of load |
-
2012
- 2012-03-27 CN CN201210083735.6A patent/CN103368150B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030057778A1 (en) * | 2001-09-25 | 2003-03-27 | George Ai | Multiple DC control for single power supply |
| CN101447739A (en) * | 2007-11-27 | 2009-06-03 | 鸿富锦精密工业（深圳）有限公司 | Three-phase AC power switching circuit |
| CN101854062A (en) * | 2010-07-01 | 2010-10-06 | 山东卓尔电气有限公司 | Automatic three-phase switching method of load |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683223A (en) * | 2013-11-12 | 2014-03-26 | 航天科工深圳（集团）有限公司 | Circuit protection system |
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| CN103368150B (en) | 2015-12-09 |
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Address after: 215126 Suzhou City Industrial Park, Suzhou, Su Sheng Tung Road, Hong Kong Street, No. 88 Applicant after: SUZHOU NEWHONGBO INTELLIGENT TECHNOLOGY CO., LTD. Address before: 215126 Suzhou City Industrial Park, Suzhou, Su Sheng Tung Road, Hong Kong Street, No. 88 Applicant before: Suzhou Industrial Prak New Hongbo Communication Technology Co., Ltd. |
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