CN2553498Y - Low voltage composite switch - Google Patents
Low voltage composite switch Download PDFInfo
- Publication number
- CN2553498Y CN2553498Y CN 02239247 CN02239247U CN2553498Y CN 2553498 Y CN2553498 Y CN 2553498Y CN 02239247 CN02239247 CN 02239247 CN 02239247 U CN02239247 U CN 02239247U CN 2553498 Y CN2553498 Y CN 2553498Y
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- relay
- controllable silicon
- phase
- voltage
- circuit
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Abstract
A low voltage composite switch is characterized by a controllable silicon and a relay, both of which are connected with a low voltage power, are connected in parallel. The switch also comprises a drive circuit for controlling the controllable silicon, a drive circuit for controlling the relay, a single chip machine, a switch signal detecting circuit and a voltage zero-cross detecting circuit. The controllable silicon is put in when the voltage exceeds zero in order to prevent the inrush current from emerging. After the voltage is stable, the relay is utilized for absorption and communication so as to free the controllable silicon. For a main loop of the relay has small contract resistance, the power consumption is low, without generating heat and causing harmonic wave. When in releasing, the controllable silicon is put in and the relay is picked out, and the communication signal of the controllable silicon is concealed. By utilizing the trait that the current of the controllable silicon is shut when the voltage exceeds zero, the utility model realizes automatic current closedown when exceeding zero.
Description
The utility model belongs to the electrical engineering field, particularly is applied to low-voltage reactive compensator capable.
At present, the reactive loss of low voltage electric network (380V/220V) is to drop into automatically and cut out and reach by being articulated in electric capacitor on the electrical network.Idle compensating control generally all is to adopt A.C. contactor or bidirectional triode thyristor to come the control capacitor break-make as switch element now, it is big to shove during the A.C. contactor switching, electrical network is impacted big, it is serious that probe of contactor is ablated, even contact melting welding phenomenon takes place, correspondingly life of capacitors also can shorten greatly; Though controllable silicon can be realized operating passing zero, thereby surge current reduces greatly, but because of the intrinsic physical characteristic of silicon controlled, exist big, the temperature rise of power consumption inevitably, generation is known as the problem that the harmonic wave composition of " electropollution " etc. can influence the long-term safety operation of equipment, big power consumption has not only been offset the energy-saving effect of reactive power compensation, and the life-span of whole device and reliability can not effectively ensure, even can influence the normal operation of whole electrical network.
The purpose of this utility model is to manufacture and design the low pressure combination switch, uses A.C. contactor or the controllable silicon shortcoming of capacitor switching switch by way of compensation in the present low-pressure reactive compensation to overcome.
The purpose of this utility model reaches like this: a kind of low-voltage composite switch, of the present utility model being characterised in that: have the controllable silicon that is connected in parallel and relay (relay or the contactor that can be used for the low-voltage alternating-current circuit that link to each other with low pressure.The relay of the following stated with), single-chip microcomputer, the switching signal testing circuit that links to each other with single-chip microcomputer and the voltage zero-crossing detection circuit that links to each other with single-chip microcomputer of drive circuit, control controllable silicon drive circuit and the control relay drive circuit of control silicon controlled drive circuit, control relay.Single-chip microcomputer is controlled by following program circuit: at first initialization, finish that each pin of single-chip microcomputer and each register initial value being set; Control signal requires switch connection, in this way the on state for connecting, begin the place to program, as its unaccessed state, then drop into the A phase relay, detect B phase voltage zero-crossing timing, and when zero passage, throw B phase controllable silicon, detect C phase voltage zero-crossing timing, and when zero passage, throw C phase controllable silicon, drop into B, C phase relay, withdraw from BC phase controllable silicon, begin the place to program; Control signal is for closing, the requirement switch turn-offs, and off state then begins to locate to program in this way, as not being off state, then drop into B, C phase controllable silicon, cut out the BC phase relay, turn-off controllable silicon, allow the controllable silicon current over-zero automatically shut down, after time-delay a period of time, cut out the A phase relay, begin the place to program.
Take the utility model of above measure, during input, voltage zero-cross moment with the zero cross fired conducting of controllable silicon elder generation, treat current stabilization after, with relay adhesive conducting, cut out relay again.Because when dropping into, be to use the controllable silicon input when voltage zero-cross, the silicon controlled response speed is fast, also be to connect during at voltage zero-cross at the two ends of load, electric current can not produce sudden change, thereby has avoided shoving.And after stable, then use relay adhesive conducting, and cut out controllable silicon, at this moment, be use the relay conducting, owing to the major loop contact resistance of relay is little, power consumption is very little, does not generate heat and produces without any harmonic wave; When cutting out, with the controllable silicon input, relay cuts out, and the controllable silicon Continuity signal is cancelled, and the characteristic of utilizing the controllable silicon current over-zero to turn-off realizes that current over-zero automatically shuts down.
In conjunction with the accompanying drawings the utility model is described in further detail again below:
Accompanying drawing 1 is a circuit block diagram of the present utility model;
Accompanying drawing 2 is program flow diagrams of the present utility model;
Accompanying drawing 3 is circuit block diagrams of the utility model embodiment;
Accompanying drawing 4 is program flow diagrams of the utility model embodiment;
Accompanying drawing 5 is low-voltage circuit figure of the utility model embodiment;
Accompanying drawing 6 is high-tension circuit figure of the utility model embodiment.
Referring to accompanying drawing 1.Accompanying drawing 1 is a phase control circuit of the present utility model, as need control three-phase, then increases two-phase phase controllable silicon drive circuit and controlled controllable silicon, increases two-phase phase relay circuit and controlled relay, increases two-phase phase voltage zero cross detection circuit.The utility model is made of with the phase voltage zero cross detection circuit that links to each other with single-chip microcomputer with the single-chip microcomputer of control phase relay drive circuit, the switching signal testing circuit that links to each other with single-chip microcomputer the controllable silicon that is connected in parallel of another termination load of termination electrical network and phase relay drive circuit, the control phase controllable silicon drive circuit of relay, control silicon controlled phase controllable silicon drive circuit, control relay.At present, above-mentioned each element circuit, general technical staff all can manufacture and design.The controllable silicon bidirectional triode thyristor is as BTA41 series.Relay can be with general A.C. contactor or novel time pulse relay, the BST series of products that as above extra large Best Co., Ltd produces.The phase voltage zero cross detection circuit can adopt conventional optocoupler zero cross detection circuit.The switch controlling signal testing circuit can adopt conventional optocoupler testing circuit.The phase controllable silicon drive circuit can be designed to various ways, for example, uses an oscillation source, drives controllable silicon by intermediate frequency transformer.The phase relay drive circuit also can be designed to various ways, and for example low power relay drives high power relay.Single-chip microcomputer can be with multiple serial commodity, for example 51 series or PIC series, and the operation of single-chip microcomputer is by the program control that is write.
Accompanying drawing 3 is three-phase low pressure composite switch circuit block diagrams of the utility model embodiment.For better effect, present embodiment has increased main high-power components testing circuit, lack detection circuit and switch working state display circuit on the basis of accompanying drawing 1.
Claims (5)
1. low-voltage composite switch, of the present utility model being characterised in that: single-chip microcomputer, switching signal testing circuit that links to each other with single-chip microcomputer and the voltage zero-crossing detection circuit that links to each other with single-chip microcomputer with drive circuit, control controllable silicon drive circuit and control relay drive circuit of the controllable silicon that is connected in parallel that links to each other with low pressure and relay, control silicon controlled drive circuit, control relay.
2. a kind of low-voltage composite switch according to claim 1 is characterized by: the switch working state display circuit that links to each other with single-chip microcomputer also can be set.
3. a kind of low-voltage composite switch according to claim 1 is characterized by: the load that links to each other with single-chip microcomputer also can be set connect not testing circuit.
4. a kind of low-voltage composite switch according to claim 1 is characterized by: the main high-power components state detection circuit that links to each other with single-chip microcomputer also can be set.
5. a kind of low-voltage composite switch according to claim 1 is characterized by: also the lack detection circuit that links to each other with single-chip microcomputer can be set.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 02239247 CN2553498Y (en) | 2002-06-20 | 2002-06-20 | Low voltage composite switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 02239247 CN2553498Y (en) | 2002-06-20 | 2002-06-20 | Low voltage composite switch |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2553498Y true CN2553498Y (en) | 2003-05-28 |
Family
ID=33712691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 02239247 Expired - Fee Related CN2553498Y (en) | 2002-06-20 | 2002-06-20 | Low voltage composite switch |
Country Status (1)
Country | Link |
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CN (1) | CN2553498Y (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101577191B (en) * | 2009-06-02 | 2011-02-02 | 深圳市英唐数码电器有限公司 | Protection circuit for protecting contact point of relay in high-power circuit |
CN103715697A (en) * | 2013-07-23 | 2014-04-09 | 陈振石 | Rural power network intelligent comprehensive power distribution device |
-
2002
- 2002-06-20 CN CN 02239247 patent/CN2553498Y/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101577191B (en) * | 2009-06-02 | 2011-02-02 | 深圳市英唐数码电器有限公司 | Protection circuit for protecting contact point of relay in high-power circuit |
CN103715697A (en) * | 2013-07-23 | 2014-04-09 | 陈振石 | Rural power network intelligent comprehensive power distribution device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C56 | Change in the name or address of the patentee | ||
CP02 | Change in the address of a patent holder |
Address after: 536000 Beihai Industrial Park, the Guangxi Zhuang Autonomous Region Road, No. 22, No. five Patentee after: Beihai Shenlan Science and Technology Development Co., Ltd. Address before: 536000 No. 34, Yunnan Road, Beihai, the Guangxi Zhuang Autonomous Region Patentee before: Beihai Shenlan Science and Technology Development Co., Ltd. |
|
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030528 Termination date: 20110620 |