CN101086937A - Intelligent AC vacuum contactor - Google Patents
Intelligent AC vacuum contactor Download PDFInfo
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- CN101086937A CN101086937A CN 200710012146 CN200710012146A CN101086937A CN 101086937 A CN101086937 A CN 101086937A CN 200710012146 CN200710012146 CN 200710012146 CN 200710012146 A CN200710012146 A CN 200710012146A CN 101086937 A CN101086937 A CN 101086937A
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Abstract
A kind of intelligent AC vacuum contactor includes contactor, the technique outline is: a protector of current mutual-inductor unit with three phase structure is suited on the vacuum tube connection board; the current mutual-inductor unit includes: three hollow mutual inductance loop positioning columns are distributed on integral framework evenly, a mutual inductance loop is set separately on every hollow mutual inductance loop positioning column; the mutual-inductor unit which collects current signal via the vacuum tube connection board, the output end is connected with input end of the data signal process circuit of protection circuit, the output end of the data signal process circuit is connected with the control circuit of equipment, output end of the control circuit is connected with excitation loop; the data signal process circuit also is connected with display circuit with key-press of protection circuit. Said contactor and protector can be used assembled, real protection of wiring can be realized, and it can be used as independent contactor and protector to control equipment.
Description
Technical field
The invention belongs to the Mechatronic control system technical field, specifically a kind of intelligent AC vacuum contactor that is applicable to the control power consumption equipment.
Background technology
The electric equipment protector of prior art carries out phase shortage, overcurrent protection usually; protector is of a great variety; structure is different, and wherein motor phase shortage, overcurrent protection are the utilization analog circuits, and characteristics of analog circuit are that anti-interference is poor; circuit delay is by pure analog circuit property settings; alterability is poor, and electrical equipment as: during phase failure on the motor, this phase current sharply reduces; thereby make protective circuit produce corresponding action, cut off the power supply of motor.Because electrical equipment moves under the phase shortage situation; the phase shortage electric current is non-vanishing, and electrical equipment is under the less situation of load, and the current value of phase shortage is not obvious than difference with other current value ratio mutually; causing Protector for electric appliance protection action insensitive easily, is not very reliable to the open-phase protection of electrical equipment.In addition, traditional contactor mainly is with air blowout, and the contact is easily burnt and oxidation, and operational environment requires harsh.
Summary of the invention
The purpose of this invention is to provide a kind of knockdown intelligent AC vacuum contactor that has three-phase current integrative-structure instrument transformer protector.
The object of the present invention is achieved like this: comprise the contactor housing that has fixed mount, vacuum tube, magnet exciting coil, armature, iron core, driving lever, connecting lever, auxiliary contact switch, terminal block, main spring, secondary spring is characterized in that: be set with a protector on the vacuum tube terminal block of contactor lower housing portion; Be provided with the current transformer unit of three-phase integrated structure in protector inside, the vacuum tube terminal block is inserted in the through hole of the mutual inductor reference column on the current transformer unit; The current transformer unit comprises: be evenly distributed with three hollow mutual inductor reference columns on the general frame of current transformer, be respectively arranged with a mutual inductor on each hollow mutual inductor reference column; Be used to gather mutual inductor unit by vacuum tube terminal block current signal, its output is connected with the data-signal treatment circuit input of protective circuit, the output of this data-signal treatment circuit is connected with the control circuit of power consumption equipment, and the output of this control circuit is connected with magnet exciting coil; The data-signal treatment circuit also with protective circuit in have a button display circuit be connected.
Described magnet exciting coil comprises: be wound with the winding of polyphone on two skeletons respectively, the terminals of winding are connected with the output of bridge rectifier; Input at bridge rectifier is serially connected with an auxiliary contact switch, also is parallel with an electric capacity on this auxiliary contact switch.
In order to make service behaviour more reliable and more stable, this strive forward magnetic coil number of turn is 7000-8000.
Above-mentioned mutual inductor unit includes a general frame, is evenly distributed with three hollow mutual inductor reference columns in general frame; On this hollow mutual inductor reference column, be respectively arranged with a mutual inductor.The way of output of above-mentioned three mutual inductors adopts four-wire system output.
The turn ratio of the mutual inductor optimization in the mutual inductor unit of the present invention is 450-550: 1; The mutual inductor number of turn is 450-550 with the sheet number ratio that silicon steel sheet is optimized: 42.
The data-signal treatment circuit of said structure adopts single chip circuit to realize.
The shell of protector adopts the ways of connecting of living to be connected with the contactor housing, and it is lived and is connected to bolt connection, hinged or grafting.
The present invention has following advantage:
The present invention makes motor protecter have complete function; realize integrated protection, start the peak time-delay of hiding, overcurrent protection time-delay, undercurrent protection time-delay, under-voltage protection time-delay, three-phase imbalance protection time-delay and protection value bound and all can be provided with according to field requirement.
The main contacts life-span is long; The intelligent vacuum contactor adopts vacuum to come arc chamber to do as main contacts, because the contact is indoor in vacuum tightness, does not produce electric arc, and main contact can be not oxidized, and contactor is prolonged useful life.
Adapt to the dust place; Because traditional contactor is an air blowout, when using in the bigger place of dust, the contact is easy to contaminated and burns.Therefore vacuum contactor can be used in the big place of dust by dust pollution, is more suitable in the mine, use such as place, colliery.
Intellectuality, digitlization and networking; Protector partly adopts microprocessor, makes defencive function intellectuality and digitlization.It is very low that the current-limiting points of traditional protection device is provided with precision, and do not have the delay protection function; Intelligent contactor not only can be provided with arbitrarily current limliting, and precision is very high, and delay time may be provided with arbitrarily, and this protector has communication interface, may form network, realizes remote monitoring.
The contactor protector is integrated; This intelligent contactor may combine with protector, constitutes combined electric appliance; Also can separately separate, installation and maintenance are convenient.
Energy-saving; The power consumption of contactor mainly concentrates on the actuation coil, therefore, and the power consumption of coil decision complete machine power.This contactor coil adopts the DC excitation mode, and adds power factor compensation capacitance in field circuit, makes whole power consumption lower.Traditional contactor adopts AC excitation, has vibration, noise and power consumption big.
Threephase current transformer is integrated; The built-in three-phase integrated galvanic current instrument transformer of protector is equipped with the internal current sample circuit, and its precision is reached more than 1%.
Mainly core in internal circuit to electric current, voltage sample, processing and control all based on software with the micro controller; by corresponding algorithm; realize that overcurrent, undercurrent, under-voltage, three imbalances effectively protect, internal circuit mainly adopts the digital circuit strong interference immunity.Start time-delay, protect time-delay to carry out freely being provided with according to field demand, external memory can write down the running status of motor, and the convenient working personnel overhaul, safeguard; Display circuit shows motor status in real time; Complete machine structure is simple, is easy to install, use; Light-emitting diode glow green during the motor operate as normal, burn red during irregular working.
Circuit sampling design of the present invention changes, judges whether three power supplys have phase shortage to cause the defective that protection sensitivity is low, protect poor reliability based on digital circuit thereby avoided pure analog circuit poor anti-interference, guard time to change according to field condition; This intelligent motor protection device reliability height, practical safe and reliable, and product cost is low, simple and reasonable, installation, use, easy to maintenance, characteristics such as range of application is wide.
Description of drawings
Fig. 1 is that the structural representation sketch cuts open in office of the present invention;
Fig. 2 is the vertical view among Fig. 1;
Fig. 3 is a current transformer cutaway view of the present invention;
Fig. 4 is a magnet exciting coil schematic diagram of the present invention;
Fig. 5 is a circuit frame principle figure of the present invention;
Fig. 6 is the data-signal treatment circuit schematic diagram in the protective circuit of the present invention;
Fig. 7 is the circuit theory diagrams that have the button display circuit of the present invention.
The symbol description ※ of ※ accompanying drawing major part
The present invention is described in further detail by example below in conjunction with accompanying drawing, but following example only is the present invention's example wherein, the rights protection scope of not representing the present invention and being limited, the scope of the present invention is as the criterion with claims.
Embodiment
Example 1
Shown in Fig. 1～2,1 among the figure comprises the contactor housing 1 that has housing fixed mount 11, is respectively arranged with vacuum tube 22 in contactor housing 1, magnet exciting coil 10, armature 8, iron core 9, driving lever 3, shift lever axis 4, connecting lever 5, auxiliary contact switch 2, terminal block 7, main spring 12, the attached spring 21 that helps is set with a protector housing 14 on the vacuum tube terminal block 17 of contactor lower housing portion; Be provided with the current transformer unit 18 of three-phase integrated structure in protector housing 14 inside, vacuum tube terminal block 17 is inserted in the through hole of the hollow mutual inductor reference column 1801 on the current transformer unit; Current transformer unit 18 (as shown in Figure 3) comprising: be evenly distributed with three hollow mutual inductor reference columns 1801 on the general frame 1805 of current transformer, be respectively arranged with a mutual inductor of being made up of silicon steel sheet 1803, winding 1802 on each hollow mutual inductor reference column 1801; The turn ratio of mutual inductor is 500: 1, and it is 500: 42 that the mutual inductor number of turn is counted ratio with the silicon steel sheet sheet; The way of output of above-mentioned three mutual inductors adopts four-wire system output.Above-mentioned protector outer casing adopts bolt to be connected with the contactor housing.In addition, 1804 among the figure is the mutual inductor skeleton.
As shown in Figure 5, be used to gather circuit mutual inductor unit by vacuum tube terminal block current signal, its output is connected with the data-signal treatment circuit input of protective circuit, the output of this data-signal treatment circuit is connected with the control circuit of power consumption equipment, and the output of this control circuit is connected with magnet exciting coil 10; The data-signal treatment circuit also with protective circuit in have a button 25 display circuit board 20 be connected.
Magnet exciting coil 10 (JP2 shown in Fig. 6 is a magnet exciting coil) comprising: be wound with the winding 902 of polyphone on two skeletons 901 respectively, the terminals of winding are connected with the output of bridge rectifier D11-D14; Input at bridge rectifier is serially connected with an auxiliary contact switch JP5 (2 part numbers among Fig. 1), also is parallel with a capacitor C 9 on this auxiliary contact switch.
This structure before use; earlier instrument transformer is sleeved on the terminal block of contactor by three jack-plug sockets 1806; output line C, D, E and the common wire F of each mutual inductor received input (the instrument transformer terminal HGXQ shown in Figure 5 of single chip circuit in the protective circuit respectively; wherein terminal 1 is connected with C; terminal 2 is connected with D; terminal 3 is connected with E, and terminal 4 is connected with F).
One, intelligent AC vacuum contactor circuit is made of following 13 partial circuits:
1, the JP4 input is connected with intelligent AC vacuum contactor main power source 380V, 1 pin of JP4 directly enters the input of transformer T1,2 pin of JP4 are connected with resistance R 34 1 ends, resistance R 34 other ends are connected with another input of transformer T1, the output of transformer is connected with JP3, and JP3 is connected with power input terminal AC;
2,1 pin of JP4 is connected with the input of rectification circuit D11-D14,2 pin of JP3 are connected with capacitor C 9 one ends, capacitor C 9 other ends are connected with relay K 1, auxiliary contact switch JP5 in parallel input is connected at the two ends of capacitor C 9, and the output of relay is connected with rectification circuit D11-D14 input;
3, rectification circuit D11-D14 output is connected with the input JP2 of magnet exciting coil;
4, control terminal JDQ is connected with JP6, the two ends of JP6 diode D15 in parallel, and 1,2 pin of JP6 are connected with relay K 1 input;
5, to comprise voltage stabilizing circuit, the diode D5 of D1-D4 diode rectifier circuit, C1-C3 capacitor filter, U6 and U7 voltage stabilizing sheet be that voltage negative bias diode is formed jointly to intelligent AC vacuum contactor power circuit;
6, intelligent AC vacuum contactor operation amplifier circuit comprises operational amplifier chip U4, its peripheral resistance R 16-R32, voltage stabilizing didoe D6-D9 form jointly;
7, intelligent AC vacuum contactor sample circuit comprises sampling A U2, its peripheral pull down resistor R12-R15, its peripheral filter capacitor C5 forms jointly;
8, the intelligent AC vacuum contactor receives transtation mission circuit and comprises to receive and send chip U3, its peripheral filter capacitor C6 and form jointly;
9, intelligent AC vacuum contactor storage circuit comprises storage chip U5, its peripheral pull-up resistor R9 and R10 forms jointly;
The single chip circuit of 10 intelligent AC vacuum contactors comprises singlechip chip U1, constitute start-oscillation circuit, filter capacitor C4, pull-up resistor R1-R8 and pull-up resistor R11 by crystal oscillator X1 and capacitor C 7 and C8 forms jointly;
11 intelligent AC vacuum contactor control circuits comprise resistance R 33, triode Q1 forms jointly;
12 intelligent AC vacuum contactor binding post circuit comprise display button terminal JP1, power input terminal AC, control terminal JDQ, Data Receiving and transmission terminal TRX, start stop button terminal QT, instrument transformer terminal HGXQ;
13 intelligent AC vacuum contactor band button display circuits are seen band button display circuit (as shown in Figure 7), and its circuit is constructed as follows:
1. the end of button S4 is connected with ground, and the button S4 other end is connected with 1 pin of display button terminal JP1 and 5 pin of JP2 respectively;
2. the end of button S3 is connected with ground, and the button S3 other end is connected with 2 pin of display button terminal JP1 and 4 pin of JP2 respectively;
3. the end of button S2 is connected with ground, and the button S2 other end is connected with 3 pin of display button terminal JP1 and 3 pin of JP2 respectively;
4. the end of button S1 is connected with 1 pin of JP2, and the button S1 other end is connected with 2 pin of JP2 with resistance R 40 1 ends respectively and is connected, and resistance R 40 other end ground connection are at the two ends of button S1 shunt capacitance C0;
5. 4 pin of display button terminal JP1 are connected with resistance R 38 1 ends, and the B utmost point of resistance R 38 other end triode Q6 connects, and the E utmost point of triode Q6 is connected with 1 pin of U1, the C utmost point base of triode Q6, and 2 pin of U1 are connected with power supply+5V;
6. 5 pin of display button terminal JP1 are connected with the end of LD2, and the other end of LD2 is connected with an end of resistance R 39, the end of diode D, 21 pin of display button terminal JP1 respectively, and the other end of the other end of resistance R 39, diode D is connected with power supply+5V;
7. the 6-9 pin of display button terminal JP1 is connected with the end of resistance R 34-R37 respectively, the other end of resistance R 34-R37 is connected with the B utmost point of triode Q2-Q5 respectively, the C utmost point of triode Q2-Q5 is connected with the C0-C3 pin of digital piece LG364BH respectively, the E utmost point of triode Q2-Q5 is connected with resistor chain RP1 input respectively, and resistor chain RP1 output termination power+5V connects;
8. the 9-11 pin of display button terminal JP1 is connected with power supply+5V, RST and ground connection respectively, and the 13-14 pin of display button terminal JP1 is connected with a-g and the dp pin of digital piece LG364BH respectively;
9. 6 pin of JP2 are connected with ground connection.
Two, the operation principle of intelligent AC vacuum contactor circuit:
This intelligent AC vacuum contactor is that cooperating equipment uses together, intelligent AC vacuum contactor and equipment are connected by winding diagram, electrical quantity according to equipment, before starting device, should set corresponding electrical quantity, specifically: start-up time, unbalanced coefficient, electric current upper lower limit value, the automatic startup of the incoming call that whether cuts off the power supply, guard delay time etc., these electrical quantitys are kept at the storage chip the inside, and these settings are provided with by button operation, referring to following Fig. 6, Fig. 7; Start-up time and protection delay time all are to realize by scm software in addition, need not external other circuit.
1, receives button signal INT0 or INT1 is a low level when " start stop button terminal QT ", single-chip microcomputer receives this low level signal, make control corresponding, control triode Q1 reaches the closed or disconnection of control relay K1, make that rectification circuit D11-D14 is closed or disconnect magnet exciting coil JP2 (10 part numbers among Fig. 4) input electric current, thereby the closed or disconnection of control intelligent AC vacuum contactor main circuit starts or stops with regard to controlling;
2, under the electric equipment normal operating conditions, amplify through it when the signal of telecommunication enters into operational amplification circuit, enter sample circuit and sample, enter single chip circuit through it, single chip circuit carries out software processes to the signal of telecommunication, shows three current values by binding post JP1 successively at display circuit.
3, receive the signal of telecommunication when single chip circuit, judge, can make following operation through single chip circuit from button S1-S4:
1), make single chip circuit reset when pressing the S1 key;
2), realize menu operation when pressing the S2 key;
3), realize add operation when pressing the S3 key;
4), realize reducing when pressing the S4 key.
4; under the electric equipment abnormal operating state; when entering into operational amplification circuit, amplifies the signal of telecommunication through it; entering sample circuit samples through it; enter single chip circuit; single chip circuit carries out software processes to the signal of telecommunication; JP1 shows error condition at display circuit by binding post; show by mistake; can judge it is overcurrent; undercurrent; overvoltage; under-voltage; three error conditions such as imbalance; and error condition write in the storage circuit chip; this is Single-chip Controlling triode Q1; make relay K 1 disconnect, make rectification circuit D11-D14 input cut off the power supply, disconnect the electric current of magnet exciting coil; make the main circuit of intelligent AC vacuum contactor disconnect, thereby reach protection electric equipment purpose.
5, in that every electrical quantity of electric equipment is set, by button S2-S4, can be kept at every electrical quantity of electric equipment in the storage circuit by single-chip microcomputer, must be in case write by revising again and could changing.When the signal of telecommunication of single-chip microcomputer collection and the electrical quantity of preservation compare,, then carry out 4 operations if exceed setting range.
Display board circuit comprises (shown in Figure 7): intelligent motor protection device display board circuit comprises the digital display driver circuit of keyboard circuit, reset circuit, buzzer circuit, alarm indication and dynamic scan and forms.Internal circuit feature: S1, S2, S3, S4 forms keyboard circuit; R40, S1, C0 forms reset circuit, and wherein S1 is a reset button; R39, D, LD2 forms the alarm indication circuit; R38, Q6, U1 (buzzer) forms buzzer circuit; RP1, Q2-Q5, DS (digital piece), R34-R37 form the digital display circuit of dynamic scan.
Principles illustrated:
1. keyboard circuit: work as S2, S2, when the S4 button was pressed, 1,2,3 pin of JP1 interface were low level; It when upspringing high level.
2. the S1 button is a reset key.When S1 pressed, 11 pin of JP1 were high level, make the single-chip microcomputer forced resetting.R40, C0 forms electrify restoration circuit.When power supply powers up, R40, the RC circuit that C0 forms makes the single-chip microcomputer electrification reset.
3. buzzer circuit: when 4 pin of JP1 were high level, triode Q6 ended, and buzzer is sounding not; When it is low level, triode Q6 conducting, self-vibration formula buzzer sounding.
5 pin of alarm indication circuit: JP1,21 foot control system LD2 double color luminotrons make it show green (normally), red (alarm condition).
4. digital dynamic scan display driver circuit: single-chip microcomputer is delivered to the segment encode of the number that will show on the 13-20 pin of JP1, then control bit select signal JP1 the 6-9 pin one of them, when the position control signal that show was low level, this site was bright; Control the corresponding data of other demonstration with the same manner.
Claims (8)
1, a kind of intelligent AC vacuum contactor comprises the contactor housing that has fixed mount, vacuum tube, magnet exciting coil, armature, iron core, driving lever, connecting lever, auxiliary contact switch, terminal block, main spring, the attached spring that helps is characterized in that: be set with a protector on the vacuum tube terminal block of contactor lower housing portion; Be provided with the current transformer unit of three-phase integrated structure in protector inside, the vacuum tube terminal block is inserted in the through hole of the mutual inductor reference column on the current transformer unit; The current transformer unit comprises: be evenly distributed with three hollow mutual inductor reference columns on the general frame of current transformer, be respectively arranged with a mutual inductor on each hollow mutual inductor reference column; Be used to gather mutual inductor unit by vacuum tube terminal block current signal, its output is connected with the data-signal treatment circuit input of protective circuit, the output of this data-signal treatment circuit is connected with the control circuit of power consumption equipment, and the output of this control circuit is connected with magnet exciting coil; The data-signal treatment circuit also with protective circuit in have a button display circuit be connected.
2, intelligent AC vacuum contactor according to claim 1, it is characterized in that: magnet exciting coil comprises: be wound with the winding of polyphone on two skeletons respectively, the terminals of winding are connected with the output of bridge rectifier; Input at bridge rectifier is serially connected with an auxiliary contact switch, also is parallel with an electric capacity on this auxiliary contact switch.
3, intelligent AC vacuum contactor according to claim 2 is characterized in that: the strive forward magnetic coil number of turn is 7000-8000.
4, intelligent AC vacuum contactor according to claim 1 is characterized in that: the turn ratio of mutual inductor is 450～550: 1.
5, intelligent AC vacuum contactor according to claim 1 is characterized in that: it is 450～550: 42 that the mutual inductor number of turn is counted ratio with the silicon steel sheet sheet.
6, intelligent AC vacuum contactor according to claim 1 is characterized in that: the mode signal output of three hollow mutual inductors adopts four-wire system output.
7, intelligent AC vacuum contactor according to claim 1 is characterized in that: the shell of protector adopts the ways of connecting of living to be connected with the contactor housing, and it is lived and is connected to bolt connection, hinged or grafting.
8, intelligent AC vacuum contactor according to claim 1 is characterized in that: the data-signal treatment circuit is a single chip circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710012146 CN101086937A (en) | 2007-07-17 | 2007-07-17 | Intelligent AC vacuum contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710012146 CN101086937A (en) | 2007-07-17 | 2007-07-17 | Intelligent AC vacuum contactor |
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| Publication Number | Publication Date |
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| CN101086937A true CN101086937A (en) | 2007-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710012146 Pending CN101086937A (en) | 2007-07-17 | 2007-07-17 | Intelligent AC vacuum contactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825249A (en) * | 2014-03-14 | 2014-05-28 | 侯增鸿 | Intelligent digital display protective switch of water pump motor |
| CN105047472A (en) * | 2015-07-07 | 2015-11-11 | 上海翔洲电气科技有限公司 | Single-stage vacuum contactor |
| CN118137214A (en) * | 2024-05-08 | 2024-06-04 | 远山建安技术有限公司 | AC/DC serial complementary power transmission and distribution device |
| CN118137214B (en) * | 2024-05-08 | 2024-07-05 | 远山建安技术有限公司 | AC/DC serial complementary power transmission and distribution device |
-
2007
- 2007-07-17 CN CN 200710012146 patent/CN101086937A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825249A (en) * | 2014-03-14 | 2014-05-28 | 侯增鸿 | Intelligent digital display protective switch of water pump motor |
| CN103825249B (en) * | 2014-03-14 | 2016-09-14 | 侯增鸿 | Pump motor intelligent digital protection switch |
| CN105047472A (en) * | 2015-07-07 | 2015-11-11 | 上海翔洲电气科技有限公司 | Single-stage vacuum contactor |
| CN105047472B (en) * | 2015-07-07 | 2019-01-15 | 上海翔洲电气科技有限公司 | A kind of monopole vacuum contactor |
| CN118137214A (en) * | 2024-05-08 | 2024-06-04 | 远山建安技术有限公司 | AC/DC serial complementary power transmission and distribution device |
| CN118137214B (en) * | 2024-05-08 | 2024-07-05 | 远山建安技术有限公司 | AC/DC serial complementary power transmission and distribution device |
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Open date: 20071212 |