CN201075345Y - Intelligent AC contactor with first phase non-arc break - Google Patents
Intelligent AC contactor with first phase non-arc break Download PDFInfo
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- CN201075345Y CN201075345Y CNU2007200080001U CN200720008000U CN201075345Y CN 201075345 Y CN201075345 Y CN 201075345Y CN U2007200080001 U CNU2007200080001 U CN U2007200080001U CN 200720008000 U CN200720008000 U CN 200720008000U CN 201075345 Y CN201075345 Y CN 201075345Y
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Abstract
The utility model relates to an intelligent AC contactor of a first phase dissociation without arc, which is characterized in that when the contact head system of the first phase dissociation without arc is at an opening position, the opening range of the first phase current breaking phase contact head is larger than that of the other two phase contact heads. Two ends of the first phase current breaking phase contact head are connected in parallel with an unidirectional thyristor or a bi-directional thyristor and the phase contact head circuit is sleeved with a current sensor to control the other two phase contact heads to be opened after the first phase current breaking phase contact head is opened about 5ms. Compared with the prior art, the utility model has simple control, convenient technique and comparatively low cost, can realize first phase dissociation without arc and the other two phase micro arc dissociation and has the advantages of reliable and stable working, long electric service life and strong function, etc.
Description
Technical field
The utility model relates to a kind of prime minister not to be had the intelligent AC contactor that arc cut-offs, particularly prime minister and does not have the contact system that electric arc cut-offs, and belongs to the intelligent AC contactor field.
Background technology
Discuss intelligent AC contactor is existing in the document at present, Zhang Peiming etc. have introduced the nonsynchronous A.C. contactor scheme of employing microprocessor control three-phase contact for inventor's utility model patent " a kind of intelligent AC contactor " (patent No. is ZL00214192.2), realized that three-phase contact electric current is in the zero cross near disjunction, though this scheme cost is low, good performance indexes, but this scheme realizes that fully prime minister's electric current cut-offs phase contact zero current and cut-offs, to structure, technology etc. all have certain requirement, Zhang Peiming etc. adopt three thyristors to realize that the no electric arc of A.C. contactor cut-offs for inventor's utility model patent " intelligent hybrid AC contactor " (patent No. is ZL 00242121.6), though these scheme performance index are very good, this scheme cost is higher.
Summary of the invention
The purpose of this utility model just provides a kind of prime minister does not have the intelligent AC contactor that arc cut-offs, and this device can guarantee in the three-phase contact that prime minister's electric current cut-offs the phase contact and do not have electric arc and cut-off, and other is cut-off near current over-zero by the two-phase contact.
The purpose of this utility model is achieved in that it comprises by three-phase contact, current transformer, thyristor, the single-chip computer control system of electromagnetic mechanism control, is characterized in that:
(1) the prime minister's electric current among described three-phase contact A, B, the C cut-offs opening apart from the distance of opening greater than other two-phase contact of phase contact B, cut-off phase contact two ends thyristor in parallel at prime minister's electric current, on this phase contact circuit, put current sensor, cut-off moment that the phase contact opens and thyristor conducting constantly with control prime minister electric current, and control other two-phase contact and cut-off the phase contact at prime minister's electric current and open about the 5ms of back and open.
Above-mentioned thyristor is unidirectional thyristor or bidirectional thyristor.
When single-chip computer control system is received breaking signal, single-chip computer control system is sampled to the current sensor output signal that prime minister's electric current cut-offs phase, and the judgement sense of current, carve in due course then and disconnect the excitatory of contactor electromagnetic mechanism, the electromagnetic mechanism outage discharges and drives the motion of three-phase contact, guarantee that prime minister's electric current cut-offs the phase contact and opens during near zero passage at this phase current, give simultaneously and be connected in parallel on the unidirectional thyristor that prime minister's electric current cut-offs phase contact two ends triggering signal is provided, when prime minister's electric current cut-offs the phase contact and opens, the unidirectional thyristor conducting, electric current is transferred to unidirectional thyristor from contact, after this turn-off the triggering signal of unidirectional thyristor, unidirectional thyristor turn-offs when current over-zero, is cut-off thereby prime minister's electric current cut-offs phase current, through about 5ms left and right sides time, the two-phase contact is opened in addition, this two-phase contact electric current also cut-offs near zero passage the time, thereby guarantees in the three-phase contact that prime minister's electric current cut-offs the phase contact and do not have electric arc and cut-off, and the few arc energy of two-phase contact cut-offs in addition.
The utility model is compared with prior art controlled simply, and technology is convenient, and cost is lower, can realize that the prime minister does not have electric arc and cut-offs with the few arc energy of other two-phase and cut-off, and has reliable and stable work, electric life height, characteristics such as function is strong.
Description of drawings
Fig. 1 is a three-phase structure of contact terminal schematic block diagram of the present utility model;
Fig. 2 implements one circuit connection schematic block diagram for the utility model;
Fig. 3 implements two circuit connection schematic block diagram for the utility model.
Embodiment
Among Fig. 1, Fig. 2:
A is the first phase contact; Phase current cut-offs the phase contact headed by the B; C is the third phase contact; G is a touch spring; CT is a current sensor; SCR is a unidirectional thyristor; E is an electromagnetic mechanism; F is a single-chip computer control system.
From Fig. 1, Fig. 2 as can be known, 1 end of power supply is received 4 ends of load (D) through the first phase contact (A), 2 ends of power supply pass current sensor (CT) and cut-off 5 ends that phase contact (B) is received load (D) through prime minister's electric current again, the anode of unidirectional thyristor (SCR) is received prime minister's electric current respectively with negative electrode and is cut-off two ends of contact (B) mutually, 3 ends of power supply are received 6 ends of load (D) through third phase contact (C), two outputs of current sensor (CT) respectively with two input S1 of single-chip computer control system (F), S2 joins, the control utmost point of unidirectional thyristor (SCR) and negative electrode respectively with two output S3 of single-chip computer control system (F), S4 joins, two output S5 in addition of single-chip computer control system (F), S6 receives the coil two end S7 of electromagnetic mechanism (E), S8.
When single-chip computer control system is received breaking signal, single-chip computer control system is sampled to the current sensor output signal that prime minister's electric current cut-offs phase, and the judgement sense of current, carve in due course then and disconnect the excitatory of contactor electromagnetic mechanism, the electromagnetic mechanism outage discharges and drives the motion of three-phase contact, guarantee that prime minister's electric current cut-offs the phase contact and opens during near zero passage at this phase current, give simultaneously and be connected in parallel on the unidirectional thyristor that prime minister's electric current cut-offs phase contact two ends triggering signal is provided, when prime minister's electric current cut-offs the phase contact and opens, the unidirectional thyristor conducting, electric current is transferred to unidirectional thyristor from contact, after this turn-off the triggering signal of unidirectional thyristor, unidirectional thyristor turn-offs when current over-zero, is cut-off thereby prime minister's electric current cut-offs phase current, through about 5ms left and right sides time, the two-phase contact is opened in addition, this two-phase contact electric current also cut-offs near zero passage the time, thereby guarantees in the three-phase contact that prime minister's electric current cut-offs the phase contact and do not have electric arc and cut-off, and the few arc energy of two-phase contact cut-offs in addition.
Among Fig. 1, Fig. 3, A is the first phase contact; Phase current cut-offs the phase contact headed by the B; C is the third phase contact; G is a touch spring; CT is a current sensor; SSR is a bidirectional thyristor; E is an electromagnetic mechanism; F is a single-chip computer control system;
From Fig. 1, Fig. 2 as can be known, 1 end of power supply is received 4 ends of load (D) through the first phase contact (A), 2 ends of power supply pass current sensor (CT) and cut-off 5 ends that phase contact (B) is received load (D) through prime minister's electric current again, the anode of bidirectional thyristor (SSR) is received prime minister's electric current respectively with negative electrode and is cut-off two ends of contact (B) mutually, 3 ends of power supply are received 6 ends of load (D) through third phase contact (C), two outputs of current sensor (CT) respectively with two input S1 of single-chip computer control system (F), S2 joins, the control utmost point of bidirectional thyristor (SSR) and negative electrode respectively with two output S3 of single-chip computer control system (F), S4 joins, two output S5 in addition of single-chip computer control system (F), S6 receives the coil two end S7 of electromagnetic mechanism (E), S8.
When single-chip computer control system is received breaking signal, single-chip computer control system is sampled to the current sensor output signal that prime minister's electric current cut-offs phase, but do not need to judge the sense of current, carve in due course then and disconnect the excitatory of contactor electromagnetic mechanism, the electromagnetic mechanism outage discharges and drives the motion of three-phase contact, guarantee that prime minister's electric current cut-offs the phase contact and opens during near zero passage at this phase current, give simultaneously and be connected in parallel on the bidirectional thyristor that prime minister's electric current cut-offs phase contact two ends triggering signal is provided, when prime minister's electric current cut-offs the phase contact and opens, the bidirectional thyristor conducting, electric current is transferred to bidirectional thyristor from contact, after this turn-off the triggering signal of bidirectional thyristor, bidirectional thyristor turn-offs when current over-zero, is cut-off thereby prime minister's electric current cut-offs phase current, through about 5ms left and right sides time, the two-phase contact is opened in addition, this two-phase contact electric current also cut-offs near zero passage the time, thereby guarantees in the three-phase contact that prime minister's electric current cut-offs the phase contact and do not have electric arc and cut-off, and the few arc energy of two-phase contact cut-offs in addition.
Claims (2)
1. a prime minister does not have the intelligent AC contactor that arc cut-offs, and it comprises by three-phase contact, current transformer, thyristor, the single-chip computer control system of electromagnetic mechanism control, it is characterized in that:
(1) the prime minister's electric current among described three-phase contact A, B, the C cut-offs opening apart from the distance of opening greater than other two-phase contact of phase contact B, cut-offs phase contact two ends thyristor in parallel at prime minister's electric current, puts current sensor on this phase contact circuit;
(2) 1 end of power supply is received 4 ends of load (D) through the first phase contact (A); 2 ends of power supply pass current sensor (CT) and cut-off 5 ends that phase contact (B) is received load (D) through prime minister's electric current again, and the anode of unidirectional thyristor (SCR) is received prime minister's electric current respectively with negative electrode and cut-off two ends of contact (B) mutually; 3 ends of power supply are received 6 ends of load (D) through third phase contact (C); Two outputs of current sensor (CT) join with two inputs (S1, S2) of single-chip computer control system (F) respectively, the control utmost point of unidirectional thyristor (SCR) and negative electrode join with two outputs (S3, S4) of single-chip computer control system (F) respectively, and two outputs (S5, S6) in addition of single-chip computer control system (F) are received coil two ends (S7, S8) of electromagnetic mechanism (E).
2. prime minister according to claim 1 does not have the intelligent AC contactor that arc cut-offs, and it is characterized in that: described thyristor is unidirectional thyristor or bidirectional thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200080001U CN201075345Y (en) | 2007-08-22 | 2007-08-22 | Intelligent AC contactor with first phase non-arc break |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200080001U CN201075345Y (en) | 2007-08-22 | 2007-08-22 | Intelligent AC contactor with first phase non-arc break |
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| Publication Number | Publication Date |
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| CN201075345Y true CN201075345Y (en) | 2008-06-18 |
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| CNU2007200080001U Expired - Fee Related CN201075345Y (en) | 2007-08-22 | 2007-08-22 | Intelligent AC contactor with first phase non-arc break |
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2007
- 2007-08-22 CN CNU2007200080001U patent/CN201075345Y/en not_active Expired - Fee Related
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| US9726726B2 (en) | 2014-11-06 | 2017-08-08 | Rockwell Automation Technologies, Inc. | Single-pole, single current path switching system and method |
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| US10141143B2 (en) | 2014-11-06 | 2018-11-27 | Rockwell Automation Technologies, Inc. | Wear-balanced electromagnetic motor control switching |
| US9722513B2 (en) | 2014-11-06 | 2017-08-01 | Rockwell Automation Technologies, Inc. | Torque-based stepwise motor starting |
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| CN105428118B (en) * | 2014-12-11 | 2018-06-22 | 广州市金矢电子有限公司 | Arc-control device and Switch without electric arc |
| CN105428118A (en) * | 2014-12-11 | 2016-03-23 | 广州市金矢电子有限公司 | Arc extinguishing device and non-arc switch |
| CN105742122B (en) * | 2015-02-27 | 2018-07-31 | 广州市金矢电子有限公司 | Intelligent switch and its application system |
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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: 20080618 Termination date: 20120822 |