CN2174007Y - Touch button electronic switch - Google Patents
Touch button electronic switch Download PDFInfo
- Publication number
- CN2174007Y CN2174007Y CN 93228695 CN93228695U CN2174007Y CN 2174007 Y CN2174007 Y CN 2174007Y CN 93228695 CN93228695 CN 93228695 CN 93228695 U CN93228695 U CN 93228695U CN 2174007 Y CN2174007 Y CN 2174007Y
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- CN
- China
- Prior art keywords
- controllable silicon
- resistance
- diode
- connects
- parallel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides an electronic switch. A back flow bridge arm composed of diodes D4 and D5 is connected in parallel with an eliminator supply, and the control pole of a silicon controlled is connected with the input end of the back flow bridge arm; the silicon controlled is connected in series with a coil L 1 in a mutual inductor and is bridged with the two ends of a DC power supply; a diode D1 and a resistor R4 are connected in series and are connected in parallel with the mutual inductor; a start button is connected with the control pole of the silicon controlled; a stop button is connected with the other control pole of the silicon controlled.
Description
The utility model belongs to a kind of sub-switch of power failure that is used for alternating current circuit.
Being used for the switch of the following single-phase low-power equipment of alternating current circuit 500V, generally is mechanical contact-type, finds that in use there is following problem in it:
1, in illuminating line, in case the power failure lamp extinguishes, at this moment switch can not be got back to off state automatically, and when sending a telegram here, circuit still is in on-state again, if at this moment indoor unmanned, certainly will waste electric energy, after indivedual loads work long hours, and can initiation fire.
2, in the power distribution, when a motor needs the strange land operation, power supply indication, operation indication need be arranged, start stop button, five lines of minimum needs are introduced the strange land.Make troubles for maintenance, distribution.
The purpose of this utility model provides a kind of electronic switch that can avoid above-mentioned deficiency.
Describe the technical solution of the utility model in detail below in conjunction with accompanying drawing.
Accompanying drawing is an electrical schematic diagram of the present utility model.
Composition of the present utility model is:
1, form bridge rectification power by D6-D9, be the power supply of this switch, it gets alternating current, and RL connects with load;
2, current-limiting resistance R2 is connected on the two ends of rectifier power source with after light-emitting diode D3 connects;
3, controllable silicon ST1 is connected on the two ends of rectifier power source with after a lateral coil L1 among the instrument transformer B connects;
4, diode D4 and D5 form the backflow brachium pontis, are parallel to D8, D9, and the control utmost point of controllable silicon ST1 is connected on the input of backflow brachium pontis by resistance R 3, and the effect of backflow brachium pontis is: the CONTROLLED POTENTIAL of clamping down on controllable silicon ST is more negative, and controllable silicon is turn-offed reliably;
5, diode D1 is with after resistance R 4 is connected, and B is in parallel with instrument transformer, and its effect is: the shunting one part of current, guarantee instrument transformer B in electronegative potential work, like this instrument transformer just can do very little, the while has also been controlled the overall work voltage of switch;
6, the opposite side coil L2 among the instrument transformer B connects the anode of controllable silicon ST2, and the control utmost point of controllable silicon ST2 and negative electrode are connected on the two ends of resistance R 4 respectively;
7, light-emitting diode D2 is in parallel with resistance R 3;
8, start button QA is connected between the positive pole of light-emitting diode D2 and D3;
9, stop button is connected between the positive pole of the control utmost point of controllable silicon ST2 and diode D1.
Operation principle is:
When switch is connected place in circuit with load RL after, switching control section is because of the rectified action of D6-D9, the direct voltage of power supply will be obtained approaching, this voltage is through the current limliting of overload and R2, make red light emitting diodes D3 luminous, pointed out having or not of power supply, because of little electric current through overload, thereby just detected the access state of load.
When the needs loaded work piece, press QA, after the dividing potential drop of D2, D3 and R3, trigger controllable silicon ST1 conducting, the control utmost point counter goes out voltage makes green LED D2 conducting, and the prompting load is subjected to electricity work.Simultaneously, commutating voltage moment drops to below 2 volts, and D3 will end, the voltage of this moment is pulsating direct current, thereby store energy will be arranged when flowing through L1, and discharging zero point is feedback by D6-D9, make controllable silicon guarantee not turn-off, thereby guaranteed to load on AC side and flow through zero and do not have and flash at zero point.
When the negative stream of disconnecting surpasses rated current (is to adjust arbitrarily according to load); the R4 both end voltage will rise; trigger controllable silicon ST2; the ST2 conducting, L2 will have electric current to pass through, because of different with the L1 phase sequence; L1 stops energy storage; controllable silicon occurs because of arranged zero point, and turn-off (0.01 second) in half cycle, finishes overcurrent protection.In like manner, surpass (0.01 second) when the empty connection of outer circuit, sparking, power failure, time, controllable silicon will turn-off, and prevent the impact that surge voltage causes load effectively.
When the need switching off load, press TA, controllable silicon ST2 conducting, the result same with last generation gets back to initial condition, cuts off load.
D4, D5 are parallel to D8, D9, make the SCR control electrode potential become negative, and the access of R3 has increased negative stream, has prevented that effectively controllable silicon from misleading.Cooperate with C1, C2, R1, formed good anti-misleading and safeguard measure.
The utility model compared with prior art has the following advantages:
1, the utility model is that just work under the electric situation is being arranged, and after power failure, this switch quits work, when sending a telegram here, only otherwise trigger start button, it is not still worked again, therefore it can prevent effectively because of have a power failure, the position of the switch indeterminate cause forget the phenomenon of turning off the light, saves energy is eliminated disaster hidden-trouble.
2, this switch is a self-locking, decompression autospasy, overcurrent self-insurance.The accident that can prevent effectively enlarges protection equipment.
3, the proof load of this switch automatically shuts down at point of zero voltage, joins when circuit produces void, and during the circuit sparking, switch automatically shuts down, and proof load is not subjected to the impact of surge voltage.
Claims (2)
1, a kind of contact button formula start and stop electronic switch is characterized in that:
(1), form bridge rectification power, be the power supply of this switch, it gets alternating current, and R1 connects with load by D6-D9;
(2), current-limiting resistance R2 is with after light-emitting diode D3 connects, and is connected on the two ends of rectifier power source;
(3), controllable silicon ST1 is with after a lateral coil L1 among the instrument transformer B connects, and is connected on the two ends of rectifier power source;
(4), diode D4 and D5 form the backflow brachium pontis, is parallel to D8, D9, the control utmost point of controllable silicon ST1 is connected on the input of backflow brachium pontis by resistance R 3;
(5), diode D1 is with after resistance R 4 is connected, B is in parallel with instrument transformer;
(6), the opposite side coil L2 among the instrument transformer B connects the anode of controllable silicon ST2, the control utmost point of controllable silicon ST2 and negative electrode are connected on the two ends of resistance R 4 respectively;
(7), light-emitting diode D2 is in parallel with resistance R 3;
(8), start button QA is connected between the positive pole of light-emitting diode D2 and D3;
(9), stop button is connected in controllable silicon ST
2The control utmost point and the positive pole of diode D1 between.
2, electronic switch according to claim 1 is characterized in that: D2 is a red light emitting diodes, and D3 is a green LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228695 CN2174007Y (en) | 1993-07-09 | 1993-07-09 | Touch button electronic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93228695 CN2174007Y (en) | 1993-07-09 | 1993-07-09 | Touch button electronic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2174007Y true CN2174007Y (en) | 1994-08-10 |
Family
ID=33805697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93228695 Expired - Fee Related CN2174007Y (en) | 1993-07-09 | 1993-07-09 | Touch button electronic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2174007Y (en) |
-
1993
- 1993-07-09 CN CN 93228695 patent/CN2174007Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |