CN2834021Y

CN2834021Y - Contact-less time relay

Info

Publication number: CN2834021Y
Application number: CN 200520024891
Authority: CN
Inventors: 刘天亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-13
Filing date: 2005-09-13
Publication date: 2006-11-01
Anticipated expiration: 2015-09-13

Abstract

The utility model discloses a contactless time relay. The utility model is composed of a housing, a control circuit and a control button arranged on the housing, wherein the control circuit is composed of four parts, namely a rectification pressure limiting circuit, a decompression and filtration voltage stabilizing circuit, a timing circuit and a switch circuit; a CMOS integrated sheet is used in a circuit to make the volume of the relay small. When the utility model is used, the utility model and a controlled load can be connected in series with an automation line in a simple and direct connection mode, an alternating current and a direct current are universally used, the application range of voltages is large (AC/DC12-240V), and simultaneously, a passive operating mode and a contactless control are completely realized, and the safety of explosion-proof occasions is guaranteed. The utility model has the advantages of long time delay range, high precision, moisture prevention, dust prevention, corrosion prevention, etc. The utility model is matched with a contactor, an electronic circuit, etc. to form various timing links; the utility model has wide service application in process control and automation control.

Description

A kind of non-contact time relay

Technical field:

The utility model relates to a kind of circuit protection device, particularly relates to a kind of non-contact time relay.

Background technology:

Developing rapidly of industry, in process control with in controlling automatically, the time relay is accompanied by the revolution again and again of industry, uses so far.At present, the employed time relay of all trades and professions is various in style, but volume is big, control is loaded down with trivial details, conversion regime is undesirable no matter any relay does not all break away from, need interface, socket and the accessory power supply of configurations match and relay contact to change defectives such as output, wiring complexity.

Summary of the invention:

Technical problem to be solved in the utility model provides a kind of non-contact time relay, this relay volume is little, control easy, do not need the interface of configurations match, socket and accessory power supply, realize contactless conversion output, wiring is very simple, technical solution adopted in the utility model is as follows, the utility model is by shell, control circuit and the control button that is located on the shell are formed, it is characterized in that control circuit is made up of four parts, it is the rectification pressure limiting circuit, the step-down filter regulator circuit, timing circuit and switching circuit, what wherein the rectification pressure limiting circuit adopted is full bridge rectifier, under exchange status, when being in the time-delay state, the full-wave rectification output circuit is as the DC power supply of time delay process, regularly finish, the controllable silicon conducting that is triggered, full bridge rectifier is as nonpolarity DC channel, and the induced voltage of piezo-resistance restriction surge voltage and inductance element, to prevent to damage electronic component; By resistance R ₁, R ₂, capacitor C ₁, rectifier cell D ₅Form step-down, filtering and voltage stabilizing circuit, power supply as timing element IC, output voltage is 12V, because IC adopts integrated of Low-Power CMOS, the voltage range of application big (3～18V), therefore, in very big voltage range, can both operate as normal, and have advantages of higher stability and timing accuracy; Timing circuit is the core link of this time-delay relay, by CMOS programmable timer and peripheral Resistor-Capacitor Unit R _Tc, C _TcForm, contain oscillator, frequency of oscillation is by external resistor and capacitor component R _sDetermine that maximum frequency of oscillation is 100KHz, binary counter uses progression by programming Control, and the automatic power of this time-delay relay of control of Electric potentials resets and export control, makes the timing can be from second level, month level or grade control; Controllable silicon SCR constitutes switching circuit; when 8 foots of IC jump to high potential by electronegative potential, behind electric resistance partial pressure, remove to trigger controllable silicon, drive load after the controllable silicon conducting; circuit is provided with silicon controlled rectifier protecting simultaneously: the one, and when controllable silicon both end voltage rate of change is higher, can be the junction capacitance C on barrier layer ₂Charging current is released, and prevents to mislead; The 2nd, when exchanging use, prevent alternating voltage when zero crossing, controllable silicon is turn-offed, guaranteed the continuity of alternating current path; The 3rd, by capacitor C ₃Absorbing inverse peak voltage protects.

Compared with prior art, the utility model volume is little, power consumption is little, only need two lead-in wires can finish full control, contactless, as to have guaranteed flame proof occasion fail safe, nonpolarity, can guarantee the accuracy that inserts, but AC and DC is dual-purpose, and (AC/DC12～240V), reference time delay is long, the precision height greatly to have the voltage range of application, moistureproof, dustproof, anticorrosion is etc. advantage, cooperate with contactor, electronic circuit etc., can form various timing links, in process control and automation control, have purposes widely.

Description of drawings:

Accompanying drawing 1 is the utility model circuit block diagram

Accompanying drawing 2 is the utility model circuit diagrams

Specific embodiments:

Rectification of the present utility model, pressure limiting circuit are full bridge rectifier, under exchange status, when being in the time-delay state, the full-wave rectification output circuit is as the DC power supply of time delay process, regularly finish, the controllable silicon conducting that is triggered, full bridge rectifier is provided with piezo-resistance R as nonpolarity DC channel ₁Limiting surge voltage and inductance does not have the induced voltage of part, and to prevent to damage electronic component, step-down filtering, voltage stabilizing circuit are by resistance R ₁, R ₂, capacitor C ₁, rectifier cell D ₅Form, power supply output as timing element IC, voltage is 12V, since integrated of IC employings degree Low-Power CMOS, voltage range of application greatly (3～18V), therefore, in very big voltage range, can both operate as normal, and have advantages of higher stability and timing accuracy, timing circuit is by CMOS programmable timer and peripheral Resistor-Capacitor Unit R _Tc, C _TcForm, contain oscillator, frequency of oscillation is by external resistor and capacitor component R _sDetermine; maximum frequency of oscillation is 100KHz; binary counter uses progression by programming Control; the automatic power of this time-delay relay of control of Electric potentials resets and exports control; timing can from second level, month the level or the grade control; controllable silicon constitutes switching circuit; when 8 pin of IC jump to high potential by electronegative potential; behind electric resistance partial pressure, remove to trigger controllable silicon; drive load after the controllable silicon conducting; this circuit also is provided with silicon controlled rectifier protecting simultaneously: the one, and when controllable silicon both end voltage rate of change is higher, can be the junction capacitance C on barrier layer ₂Charging current is released, and prevents to mislead; The 2nd, when exchanging use, prevent alternating voltage when zero crossing, controllable silicon is turn-offed, guaranteed the continuity of alternating current path; The 3rd, by capacitor C ₃Absorbing inverse peak voltage protects.The function that the utility model possesses is as follows:

1. dual-purpose (the 24V～240V) of AC and DC;

2. by changing Rtc, time-delay can reach 1～1000 second, replaces Rtc can carry out the step-less adjustment time-delay with potentiometer;

3. current loading≤1A

Circuit is according to service condition, rectifier cell, piezo-resistance, controllable silicon and electric capacity can be selected the element of suitable withstand voltage and load capacity for use, by changing component parameters and selecting different timing constant K (or cascade use) for use, can make timing scope longer or shorter (several seconds zero point or several hrs), voltage range of application lower or higher (below the 6V or more than the 240V), in a word, in alternating current circuit, DC circuit, forceful electric power or light current control, has very flexibly purposes widely.

Claims

1, a kind of non-contact time relay, form by shell, control circuit and the control button that is located on the shell, it is characterized in that control circuit is made up of four parts, be rectification pressure limiting circuit, step-down filter regulator circuit, timing circuit and switching circuit, what wherein the rectification pressure limiting circuit adopted is full bridge rectifier, piezo-resistance R ₁Be used for limiting the induced voltage of surge voltage and inductance element, resistance R ₁, R ₂, capacitor C ₁, rectifier cell D ₅Form step-down, filtering and voltage stabilizing circuit, and as the power supply of timing element IC, output voltage is 12V, IC adopts integrated of Low-Power CMOS, and the voltage range of application is 3～18V, and timing circuit is by CMOS programmable timer and peripheral Resistor-Capacitor Unit R _Tc, C _TcForm, the oscillator that CMOS includes, its frequency of oscillation is by Resistor-Capacitor Unit R _sDetermine; maximum frequency of oscillation is 100KHz; binary counter uses progression by programming Control; the automatic power of this time-delay relay of control of Electric potentials resets and exports control; make the timing can be from second level, month level or grade control; controllable silicon SCR constitutes switching circuit; when 8 foots of IC jump to high potential by electronegative potential; behind electric resistance partial pressure, remove to trigger controllable silicon; drive load after the controllable silicon conducting; circuit is provided with silicon controlled rectifier protecting simultaneously: the one, and when controllable silicon both end voltage rate of change is higher, can be the junction capacitance C on barrier layer ₂Charging current is released, and prevents to mislead; The 2nd, when exchanging use, prevent alternating voltage when zero crossing, controllable silicon is turn-offed, guaranteed the continuity of alternating current path; The 3rd, by capacitor C ₃Absorbing inverse peak voltage protects.