CN201813142U - Full-electronic open-phase protection controller - Google Patents
Full-electronic open-phase protection controller Download PDFInfo
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- CN201813142U CN201813142U CN2010205585593U CN201020558559U CN201813142U CN 201813142 U CN201813142 U CN 201813142U CN 2010205585593 U CN2010205585593 U CN 2010205585593U CN 201020558559 U CN201020558559 U CN 201020558559U CN 201813142 U CN201813142 U CN 201813142U
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Abstract
The utility model discloses a full-electronic open-phase protection controller, aiming at overcoming the defects of complicated circuit, more electronic elements, high cost, time-delay, weak interference resistance, insensitive reaction, inconvenient implementation, high requirement on environment and configuration and the like of the common open-phase protection controllers at present. The full-electronic open-phase protection controller has the advantages of strong interference resistance, sensitive reaction, simple circuit, low requirement on the environment and configuration, is convenient to implement, and can be used in overload damage of a rectifying device caused by when a high-power three-phase controllable rectifying circuit has an open-phase failure. So the open-phase condition in the three-phase alternating current circuit is necessary to detect, and a load power supply can be quickly cut off for protection when the open-phase failure happens, the open-phase fast tripping can easily cause tripping less than 30MS, so that the safety of the rectifying device can be protected reliably.
Description
Technical field
The utility model relates to a kind of open phase protector.
Background technology
Realize that the open-phase protection way is a lot, there is complex circuit in general way commonly used at present, and used electronic component is many, and there is the time delay link in the cost height, a little less than the antijamming capability, reacts insensitive, and implements inconvenience, to defectives such as environment and configuration requirement height.
The utility model content
The purpose of this utility model provides a kind of all-electronin open-phase protection controller.
The purpose of this utility model realizes in the following way: a kind of all-electronin open-phase protection controller, comprise three-phase alternating current signal input interface Ia, Ib, Ic, wherein three-phase alternating current signal input interface Ia divides two-way, and one the tunnel through resistance R 6 to power cathode GND; One the tunnel through resistance R 5 output back branch three tunnel, a tunnel through electric capacity E1 to power cathode GND, the one tunnel through diode D2 to power cathode GND, the one tunnel connects 5 pin of comparator U1A; 12 pin of comparator U1A meet power cathode GND; 4 pin of comparator U1A divide two the tunnel, the one tunnel to connect 6 pin of comparator U1B, 8 pin and the resistance R 14 of comparator U1C respectively, and resistance R 14 meets power cathode GND, and one the tunnel through resistance R 1 to power vd D; 3 pin of comparator U1A meet power vd D; Resistance R 2 one termination power VDD, the other end connect respectively comparator U1A 2 pin, with the door U2A 1 pin or the door U3A 8 pin; Resistance R 3 one termination power VDD, the other end connect respectively comparator U1B 1 pin, with the door U2A 2 pin and or the door U3A 2 pin; Resistance R 4 one termination power VDD, the other end connect respectively comparator U1C 14 pin, with the door U2A 8 pin and or the door U3A 1 pin; Meet power vd D with 14 pin of door U2A, connect 1 pin of XOR gate U4A, connect with 7 pin of door U2A or 7 pin of door U3A, and meet power cathode GND with 9 pin of door U2A; Or 9 pin of door U3A connect 2 pin of XOR gate U4A, or 14 pin of door U3A meet power vd D; 14 pin of XOR gate U4A meet power vd D, and 7 pin of XOR gate U4A meet power cathode GND, and 3 pin of XOR gate U4A connect the base stage of triode Q1 through resistance R 8; The E utmost point of triode Q1 meets power cathode GND; The positive termination power vd D of diode D1, the negative terminal of diode D1 connects the C utmost point of triode Q1; With diode D1 relay J R1 in parallel, contact P4, P5, P6 are arranged at relay J R1;
The three-phase alternating current signal input interface Ib divide two-way, and one the tunnel through resistance R 10 to power cathode GND; One the tunnel through resistance R 9 output back branch three tunnel, a tunnel through electric capacity E2 to power cathode GND, the one tunnel through diode D3 to power cathode GND, the one tunnel connects 7 pin of comparator U1B;
The three-phase alternating current signal input interface Ic divide two-way, and one the tunnel through resistance R 13 to power cathode GND; One the tunnel through resistance R 12 output back branch three tunnel, a tunnel through electric capacity E3 to power cathode GND, the one tunnel through diode D4 to power cathode GND, the one tunnel connects 9 pin of comparator U1C.
The utlity model has following beneficial effect, can resist strong jamming, be quick on the draw, circuit is simple, and implement easily, extremely low to environment and configuration requirement, can use the overload that in powerful three-phase controlled rectifier circuit, when open-phase fault takes place, will cause rectifying device to damage.Therefore must monitor the phase shortage situation in the three-phase circuit, can cut off load power source protection rapidly when open-phase fault takes place, this phase failure quick-break can be easy to accomplish＜the 30MS tripping operation, the safety of energy reliably protecting rectifying device.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model;
Embodiment
As shown in Figure 1, a kind of all-electronin open-phase protection controller comprises three-phase alternating current signal input interface Ia, Ib, Ic, and wherein three-phase alternating current signal input interface Ia divides two-way, and one the tunnel through resistance R 6 to power cathode GND; One the tunnel through resistance R 5 output back branch three tunnel, a tunnel through electric capacity E1 to power cathode GND, the one tunnel through diode D2 to power cathode GND, the one tunnel connects 5 pin of comparator U1A; 12 pin of comparator U1A meet power cathode GND; 4 pin of comparator U1A divide two the tunnel, the one tunnel to connect 6 pin of comparator U1B, 8 pin and the resistance R 14 of comparator U1C respectively, and resistance R 14 meets power cathode GND, and one the tunnel through resistance R 1 to power vd D; 3 pin of comparator U1A meet power vd D; Resistance R 2 one termination power VDD, the other end connect respectively comparator U1A 2 pin, with the door U2A 1 pin or the door U3A 8 pin; Resistance R 3 one termination power VDD, the other end connect respectively comparator U1B 1 pin, with the door U2A 2 pin and or the door U3A 2 pin; Resistance R 4 one termination power VDD, the other end connect respectively comparator U1C 14 pin, with the door U2A 8 pin and or the door U3A 1 pin; Meet power vd D with 14 pin of door U2A, connect 1 pin of XOR gate U4A, connect with 7 pin of door U2A or 7 pin of door U3A, and meet power cathode GND with 9 pin of door U2A; Or 9 pin of door U3A connect 2 pin of XOR gate U4A, or 14 pin of door U3A meet power vd D; 14 pin of XOR gate U4A meet power vd D, and 7 pin of XOR gate U4A meet power cathode GND, and 3 pin of XOR gate U4A connect the base stage of triode Q1 through resistance R 8; The E utmost point of triode Q1 meets power cathode GND; The positive termination power vd D of diode D1, the negative terminal of diode D1 connects the C utmost point of triode Q1; With diode D1 relay J R1 in parallel, contact P4, P5, P6 are arranged at relay J R1;
The three-phase alternating current signal input interface Ib divide two-way, and one the tunnel through resistance R 10 to power cathode GND; One the tunnel divide through resistance R 9 output back three the tunnel, the one tunnel through electric capacity E2 to power cathode GND, the one tunnel arrives power cathode GND through diode D 3, the one tunnel connects 7 pin of comparator U1B;
The three-phase alternating current signal input interface Ic divide two-way, and one the tunnel through resistance R 13 to power cathode GND; One the tunnel through resistance R 12 output back branch three tunnel, a tunnel through electric capacity E3 to power cathode GND, the one tunnel through diode D4 to power cathode GND, the one tunnel connects 9 pin of comparator U1C.
Its operation principle is as follows:
Comparator U1A among the figure, U1B, U1C are the integrated circuit comparators, in order to the three-phase alternating current from the current transformer secondary is carried out the phase shortage monitoring.
With A phase observation circuit is example: resistance R 6 is in parallel with A phase current mutual inductor secondary, current signal is converted to voltage signal, after resistance R 5 current limlitings, carry out halfwave rectifier, obtain the positive half wave signal and after capacitor E1 filtering, be added to comparator U1A in-phase input end (5 pin) by diode D2.Form voltage divider by resistance R 1 and R14, circuit work power VDD is carried out dividing potential drop obtain the (pressure drop that this reference voltage should produce less than the current transformer minimum load current of a reference voltage on R6, be slightly larger than the pressure drop that the intersection leakage inductance electric current of current transformer produces again on resistance R 6, in order to avoid generation misoperation), be added to the inverting input (4 pin) of comparator U1A.The 5 pin current potentials of comparator U1A are higher than the reference voltage of 4 pin when there be (not phase shortage) in this phase current.So 2 pin of comparator U1A are output as high level (one state); Otherwise the current potential that disconnects 5 pin of (during phase shortage) comparator U1A when this phase current is lower than the current potential of 4 pin, so 2 pin of comparator U1A are output as low level (" 0 " attitude).
B mutually with C phase observation circuit principle with last identical.
Comparator U2A among the figure, U3A, the U4A integrated gate circuit is formed logic judging circuit.Carry out logic determines in order to output state to three-phase phase shortage observation circuit.Comparator U2A is " with door ", and U3A is a disjunction gate, and U4A is " XOR gate ".According to the structure of above circuit diagram and the function of these three gates, the truth table that can list its logic determines is in following:
From truth table as can be seen, work as Ia, Ib, when any phase or two-phase lacked in the Ic three-phase current, the output of XOR gate U4A " Y " was the one state high level.All do not lack and work as three-phase current, when perhaps three-phase current all lacked (being that three phase mains disconnects no-load current), the output of XOR gate U4A " Y " just was " 0 " attitude low level.
The characteristics of this open-phase protection circuit are that circuit is simple, and used electronic component is few, and is with low cost, do not have the time delay link, and operate time of protection only is an AC power cycle (20ms).
This circuit can be made the open phase protector that can independently use.As shown in FIG.: the base stage of the output of " XOR gate " U4A " Y " being received NPN type triode Q1 by current-limiting resistance R8; the collector electrode of Q1 drives auxiliary relay JR1 action, its moving disconnecting point or normally opened contact are received accordingly close/the separating brake circuit can realize quick open-phase protection action.For powerful three-phase controlled rectifier circuit, the output of " XOR gate " U4A " Y " is received the control end of trigger impulse, when open-phase fault takes place, block trigger impulse, the effect of the fast acting fuse that can play, protection controlled rectification element.
This circuit also can with computer integrated protection system support, as the phase-lacking protective unit of three-phase circuit.By inserting the monitoring input port of computer integrated protection system, increase corresponding software module, can realize the intelligent open-phase protection of three-phase circuit.
This circuit is through on-the-spot practical, and antijamming capability is strong, and protection action fast and reliable satisfies the instructions for use of industry spot fully.
Claims (1)
1. all-electronin open-phase protection controller, it is characterized in that: comprise three-phase alternating current signal input interface Ia, Ib, Ic, wherein three-phase alternating current signal input interface Ia divides two-way, and one the tunnel through resistance R 6 to power cathode GND; One the tunnel through resistance R 5 output back branch three tunnel, a tunnel through electric capacity E1 to power cathode GND, the one tunnel through diode D2 to power cathode GND, the one tunnel connects 5 pin of comparator U1A; 12 pin of comparator U1A meet power cathode GND; 4 pin of comparator U1A divide two the tunnel, the one tunnel to connect 6 pin of comparator U1B, 8 pin and the resistance R 14 of comparator U1C respectively, and resistance R 14 meets power cathode GND, and one the tunnel through resistance R 1 to power vd D; 3 pin of comparator U1A meet power vd D; Resistance R 2 one termination power VDD, the other end connect respectively comparator U1A 2 pin, with the door U2A 1 pin or the door U3A 8 pin; Resistance R 3 one termination power VDD, the other end connect respectively comparator U1B 1 pin, with the door U2A 2 pin and or the door U3A 2 pin; Resistance R 4 one termination power VDD, the other end connect respectively comparator U1C 14 pin, with the door U2A 8 pin and or the door U3A 1 pin; Meet power vd D with 14 pin of door U2A, connect 1 pin of XOR gate U4A, connect with 7 pin of door U2A or 7 pin of door U3A, and meet power cathode GND with 9 pin of door U2A; Or 9 pin of door U3A connect 2 pin of XOR gate U4A, or 14 pin of door U3A meet power vd D; 14 pin of XOR gate U4A meet power vd D, and 7 pin of XOR gate U4A meet power cathode GND, and 3 pin of XOR gate U4A connect the base stage of triode Q1 through resistance R 8; The E utmost point of triode Q1 meets power cathode GND; The positive termination power vd D of diode D1, the negative terminal of diode D1 connects the C utmost point of triode Q1; With diode D1 relay J R1 in parallel, contact P4, P5, P6 are arranged at relay J R1;
The three-phase alternating current signal input interface Ib divide two-way, and one the tunnel through resistance R 10 to power cathode GND; One the tunnel through resistance R 9 output back branch three tunnel, a tunnel through electric capacity E2 to power cathode GND, the one tunnel through diode D3 to power cathode GND, the one tunnel connects 7 pin of comparator U1B;
The three-phase alternating current signal input interface Ic divide two-way, and one the tunnel through resistance R 13 to power cathode GND; One the tunnel through resistance R 12 output back branch three tunnel, a tunnel through electric capacity E3 to power cathode GND, the one tunnel through diode D4 to power cathode GND, the one tunnel connects 9 pin of comparator U1C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205585593U CN201813142U (en) | 2010-10-13 | 2010-10-13 | Full-electronic open-phase protection controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205585593U CN201813142U (en) | 2010-10-13 | 2010-10-13 | Full-electronic open-phase protection controller |
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| CN201813142U true CN201813142U (en) | 2011-04-27 |
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| CN2010205585593U Expired - Fee Related CN201813142U (en) | 2010-10-13 | 2010-10-13 | Full-electronic open-phase protection controller |
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| CN (1) | CN201813142U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022979A (en) * | 2012-11-30 | 2013-04-03 | 北京机电工程研究所 | Default phase protection circuit for multi-pulse-wave rectifying circuit |
| CN103248002A (en) * | 2013-05-16 | 2013-08-14 | 天津市百利电气有限公司 | Electronic-type overload relay with reliable phase-failure protection function |
| CN104081656A (en) * | 2012-03-23 | 2014-10-01 | 株式会社日立产机系统 | Power conversion device |
-
2010
- 2010-10-13 CN CN2010205585593U patent/CN201813142U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104081656A (en) * | 2012-03-23 | 2014-10-01 | 株式会社日立产机系统 | Power conversion device |
| CN104081656B (en) * | 2012-03-23 | 2017-04-05 | 株式会社日立产机系统 | Power inverter |
| CN103022979A (en) * | 2012-11-30 | 2013-04-03 | 北京机电工程研究所 | Default phase protection circuit for multi-pulse-wave rectifying circuit |
| CN103248002A (en) * | 2013-05-16 | 2013-08-14 | 天津市百利电气有限公司 | Electronic-type overload relay with reliable phase-failure protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XIANGTAN HUAYU TECHNOLOGY CO.LTD Free format text: FORMER OWNER: PENG JIANGUO Effective date: 20120227 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 411100 XIANGTAN, HUNAN PROVINCE TO: 411300 XIANGTAN, HUNAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120227 Address after: 411300 Yang Yang Road, Yongquan science and Technology Park, Hunan, Shaoshan Patentee after: Xiangtan Huayu Technology Co., Ltd. Address before: 411100, No. 2, building 10, 106 Station Road, Yuhu District, Hunan, Xiangtan Patentee before: Peng Jianguo |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20151013 |
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| EXPY | Termination of patent right or utility model |