CN2415456Y

CN2415456Y - Intelligent AC contactor

Info

Publication number: CN2415456Y
Application number: CN 00214192
Authority: CN
Inventors: 张培铭; 许志红
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2000-04-10
Filing date: 2000-04-10
Publication date: 2001-01-17
Anticipated expiration: 2010-04-10

Abstract

The utility model discloses an intelligent AC contactor. When a contact system of a contactor thereof is opened, a three-phase moving contact and a moving contact bridge are arranged and fixed on a contact bracket; the contact bracket is arranged on a moving iron core; the opening distance of the some phase moving contact and a static contact is S2; the distance of other two phase moving contact and the static contact is S1; S2 is greater than S1 the distance of the moving iron core and a static iron core is S3; the S3 is the sum of S2 and S4 of contact over-travel. The electric arc energy of the utility model is decreased; the breaking of less arc or no arc can be realized; the utility model has the advantages of stable operation, high electrical durability, powerful function, etc.

Description

A kind of intelligent AC contactor

The utility model belongs to a kind of novel A.C. contactor, belongs to electric type.

By retrieval as can be known, in the document intelligent AC contactor is had some argumentations at present, Xu Zhihong, Zhang Peiming etc. are published in " research of intelligent AC contactor " literary composition of " low-voltage electrical apparatus " 1998 the 3rd phases and have introduced the control method that adopts microprocessor realization A.C. contactor, yet this scheme can't realize that three-phase contact electric current is all in the zero cross near disjunction.

The purpose of this utility model is exactly at above-mentioned deficiency, and a kind of three-phase contact electric current of realizing of development is all at a kind of intelligent AC contactor of zero cross near disjunction.

The purpose of this utility model is to realize like this, it comprises single-chip computer control system, contactor electromagnetic mechanism, probe of contactor system, the probe of contactor system, three-phase moving contact and movable contact bridge are fixed on the contact supporting when open position, contact supporting is installed on the moving iron core, opening between certain phase moving contact and the fixed contact apart from being S2, distance between two-phase moving contact and the fixed contact is S1 in addition, S2 is greater than S1, distance between moving iron core and the static iron core is S3, and S3 is S2 and contact over travel S4 sum.

The utility model compared with prior art arc energy significantly reduces, and can realize few arc or does not have arc and cut-off, and has reliable and stable work, electric life height, characteristics such as function is strong.The utility model compared with prior art is a kind of reliable operation, can realize lacking arc or not having arc and cut-off, and has the intelligent AC contactor with the main computer communication function.

Below with reference to accompanying drawing utility model is further described

Fig. 1 is a structural representation block diagram of the present utility model

Fig. 2 is that the circuit part of single-chip computer control system of the present utility model connects schematic block diagram

Fig. 3 is the structural representation of the sound iron core of structure of contact terminal of the present utility model when disconnecting

Fig. 4 is the structural representation of the sound iron core of structure of contact terminal of the present utility model when closed

Among Fig. 1: A is a single-chip computer control system; B is the contactor electromagnetic mechanism; C is the probe of contactor system; Among Fig. 2: Z1 is a rectification circuit; Z2 is a master element; X is a coil; Z3 is the retentive control element; Y2 is the step-down control circuit; D is a Single Chip Microcomputer (SCM) system; E1 is a control circuit; E2 is a control circuit.

Among Fig. 3, Fig. 4: 1 is certain phase movable contact bridge; 2 is certain phase moving contact; 3 is contact supporting; 4 is fixed contact; 5 is the stationary contact bridge; 6 are moving iron core; 7 is static iron core; 8 is coil.

From Fig. 1, Fig. 2 as can be known, single-chip computer control system A control contactor electromagnetic mechanism B, contactor electromagnetic mechanism B drives the probe of contactor C of system, the circuit part of single-chip computer control system A, its annexation is that power supply Y is connected to rectification circuit Z1 AC side, rectification circuit Z1 direct current side joint master element Z2 input, master element Z2 output is connected to coil X, the delivery outlet connection control circuit E1 input of Single Chip Microcomputer (SCM) system D, control circuit E1 output is connected to master element Z2 control end, another delivery outlet connection control circuit E2 input of Single Chip Microcomputer (SCM) system D, control circuit E2 output is connected to the control end of retentive control element Z3, the output of retentive control element Z3 is connected to coil X, the input of the output termination retentive control element Z3 of lowering and stabilizing blood pressure control circuit Y2, power supply connects the input of lowering and stabilizing blood pressure control circuit Y2, the other end of the negative terminal of rectification circuit Z1 and coil X, the ground end of lowering and stabilizing blood pressure control circuit Y2 joins.

As can be seen from Figure 3, contact system of the present utility model three-phase moving contact and movable contact bridge when open position.Be installed on the contact supporting 3, contact supporting 3 is installed on the moving iron core 6, opening between certain phase moving contact 2 and the fixed contact 4 apart from being S2, distance between the two-phase dynamic/static contact is S1 in addition, S2 is greater than S1, distance between moving iron core 6 and the static iron core 7 is S3, S3 is S2 and contact over travel S4 sum, contact system of the present utility model is to arrange like this, opening of one phase contact apart from the distance of opening greater than other two-phase contact, early about 5ms of the moment that the moment that this phase contact is opened opens than other two-phase contact, Single Chip Microcomputer (SCM) system is carved the cut-out coil current in due course by keeping controlled member during keeping, under suitable spring pressure effect, make this phase contact cut-off main circuit current, cross other two-phase contact of 5ms and also cut-off main circuit current, realize lacking arc or not having arc and cut-off at the main circuit current zero cross near at the main circuit current zero cross near.

As can be seen from Figure 4, contact system of the present utility model three-phase moving contact 2 when make position contacts with fixed contact 4, and moving iron core 6 also contacts with static iron core 7.

Claims

1 one kinds of intelligent AC contactors is characterized in that:

1. it comprises single-chip computer control system (A), contactor electromagnetic mechanism (B), probe of contactor system (C), probe of contactor system (C), three-phase moving contact when open position (2) is fixed on the contact supporting (3) with movable contact bridge (1), contact supporting (3) is installed on the moving iron core (6), opening between certain phase moving contact (2) and the fixed contact (4) apart from being S2, distance between two-phase moving contact (2) and the fixed contact (4) is S1 in addition, S2 is greater than S1, distance between moving iron core (6) and the static iron core (7) is S3, and S3 is S2 and contact over travel S4 sum;

2. the circuit part of single-chip computer control system (A), its annexation is that power supply (Y) is connected to rectification circuit (Z1) AC side, rectification circuit (Z1) direct current side joint master element (Z2) input, master element (Z2) output is connected to coil (X), a delivery outlet connection control circuit (E1) input of Single Chip Microcomputer (SCM) system (D), control circuit (E1) output is connected to master element (Z2) control end, another delivery outlet connection control circuit (E2) input of Single Chip Microcomputer (SCM) system (D), control circuit (E2) output is connected to the control end of retentive control element (Z3), the output of retentive control element (Z3) is connected to coil (X), the input of the output termination retentive control element (Z3) of lowering and stabilizing blood pressure control circuit (Y2), power supply connects the input of lowering and stabilizing blood pressure control circuit (Y2), the other end of the negative terminal of rectification circuit (Z1) and coil (X), the ground end of lowering and stabilizing blood pressure control circuit (Y2) joins.