CN108768357A - A kind of high-low pressure automatic switchover electronic switching circuit - Google Patents
A kind of high-low pressure automatic switchover electronic switching circuit Download PDFInfo
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- CN108768357A CN108768357A CN201810505294.1A CN201810505294A CN108768357A CN 108768357 A CN108768357 A CN 108768357A CN 201810505294 A CN201810505294 A CN 201810505294A CN 108768357 A CN108768357 A CN 108768357A
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- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052710 silicon Inorganic materials 0.000 abstract description 6
- 239000010703 silicon Substances 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K2017/515—Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais
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- Rectifiers (AREA)
- Relay Circuits (AREA)
Abstract
The present invention discloses a kind of high-low pressure automatic switchover electronic switching circuit, including：Switching circuit control section is in low-voltage low current weak current part, L or N forceful electric power circuits are turned on and off by controlling actuation or the relieving of the contact of relay, include being compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting voltage, relay coil driving circuit starts, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, to reach the silicon-controlled electronic switch for realizing that reliability is significantly larger than existing scheme, a kind of reliable, inexpensive, automatic electronic switching circuit of intelligence is realized.
Description
Technical field
The present invention relates to electronic switching circuit technical field more particularly to a kind of high-low pressure automatic switchover electronic cutting are powered-down
Road.
Background technology
All the time, Switching Power Supply industry design when encounter exchange high-low pressure (110/220VAC) input when because of rectification after
Voltage magnitude difference is too big, and there are high frequency transformer difficult design, the transfer efficiency of transformer is low when low pressure inputs, and copper loss is serious
The problem of, and active power factor (PF) emphasizer circuit circuit is complicated, it is expensive；People are more desirable in terms of pursuing cost performance
Brought the voltage up by way of 2 voltage-doubling boosts when being inputted AC low-tension by the way of a kind of simple, low cost be allowed to
DC voltage improves transfer efficiency close to reduce transformer loss after rectification when ac high-voltage inputs.
Currently, switching electronic switching circuit about high-low pressure, in industry there are two kinds of switching modes：One is pass through object
Reason switch directly carries out high-low pressure switching；Another kind is to carry out electronics switching by the silicon-controlled circuit that seals in.Former switching side
Formula is simple, reliable, low cost, but need it is artificial carry out stirring switching manually, it is cumbersome；Latter approach passes through circuit
Detection carries out electronics automatic switchover, the disadvantage is that silicon-controlled be directly connected in forceful electric power road is easily damaged, reliability has hidden danger.
Invention content
The present invention provides a kind of high-low pressure automatic switchover electronic switching circuit, needs artificial hand to solve the prior art
Dynamic to carry out stirring switching, cumbersome, silicon-controlled be directly connected in forceful electric power road is easily damaged, and reliability has the technology of hidden danger to ask
Topic.
In order to solve the above technical problems, the present invention provides a kind of high-low pressure automatic switchover electronic switching circuit, including：
Switching circuit control section be in low-voltage low current weak current part, by control relay contact actuation or
It decontrols to turn on and off L or N forceful electric power circuits.
Wherein, the switching circuit control section is in low-voltage low current weak current part, by controlling touching for relay
The actuation or relieving of point turn on and off L or N forceful electric power circuits, including：
It is compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting voltage,
Relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting electricity
When pressure, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, including：
When the switching circuit work, L lines are then connected into the midpoint C3, C6, identical rectified voltage by relay contact closure
Voltage superposition on C3 forms two multiplication of voltages on the voltage of C6.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
When ac high voltage inputs, the switching circuit switch Q1 cut-offs, relay contact tripping, L lines cannot access
The midpoint C3, C6, voltage-doubling boost circuit cannot be formed, and rectified voltage is exported.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
Drop of the electricity after BD2, D7, C4 rectifying and wave-filtering by being formed by R1, Q2, D6, ZD7, R21, R22, R15 is taken by L/N
Press regulator circuit by voltage stabilization in predetermined value.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
Input voltage is detected by the input voltage detection circuit that R21, R22, R14, R9 divider resistance are formed.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
The base stage of triode Q12 is terminated on R9, the conducting voltage of triode corresponds to the set point of input voltage.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
R11, C1, ZD8, C20, R6, Q1 are after circuit coil driving circuit.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
ZD1 is drop-down zener diode, and when Q12 is connected, by ZD1 by the voltage pull-down of C1, ZD8 ends, and Q1 is also cut
Only, relay contact tripping, electronic switch disconnect, and two voltage doubling rectifying circuit is stopped.
Wherein, the voltage after the AC rectification by detection is compared with reference voltage, is set when exchange input is less than
When constant voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange inputs
When higher than setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
When AC-input voltage is less than setting voltage, Q12 cut-offs, ZD1 ends, ZD8 conductings, Q1 conductings, and relay touches
Point is attracted, two voltage doubling rectifying circuit work.
High-low pressure provided by the invention automatically switches electronic switching circuit, including：Switching circuit control section is in low electricity
Low current weak current part is pressed, L or N forceful electric power circuits is turned on and off by controlling actuation or the relieving of the contact of relay, wraps
It includes and is compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting voltage, relay
Coil driver starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage,
Relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and realizes that reliability wants long-range to reach
In the silicon-controlled electronic switch of existing scheme, a kind of reliable, inexpensive, automatic electronic switching circuit of intelligence is realized.
Description of the drawings
Fig. 1 is the circuit signal for the two voltage-doubling boost rectification circuits that high-low pressure of the present invention automatically switches in electronic switching circuit
Figure；
Fig. 2 is the circuit diagram that high-low pressure of the present invention automatically switches electronic switching circuit.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is described in further detail.It is emphasized that following implement
Example is merely to illustrate the present invention, but is not defined to the scope of the present invention.Likewise, following embodiment is only the portion of the present invention
Point embodiment and not all embodiments, the institute that those of ordinary skill in the art are obtained without creative efforts
There are other embodiments, shall fall within the protection scope of the present invention.
The present invention provides a kind of high-low pressure automatic switchover electronic switching circuit.
Fig. 1 and Fig. 2 are referred to, Fig. 1 is that two voltage-doubling boosts that high-low pressure of the present invention automatically switches in electronic switching circuit are whole
The circuit diagram of current circuit, Fig. 2 are the circuit diagram that high-low pressure of the present invention automatically switches electronic switching circuit, and the present invention is high
Low pressure automatically switches electronic switching circuit, including：
Switching circuit control section be in low-voltage low current weak current part, by control relay contact actuation or
It decontrols to turn on and off L or N forceful electric power circuits.
Wherein, which is in low-voltage low current weak current part, by the contact for controlling relay
Actuation or relieving turn on and off L or N forceful electric power circuits, including：
It is compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting voltage,
Relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting electricity
When pressure, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, including：
When the switching circuit works, L lines are then connected into the midpoint C3, C6, identical rectified voltage C3 by relay contact closure
On voltage superposition on the voltage of C6, formed two multiplication of voltages.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
When ac high voltage inputs, switching circuit switch Q1 cut-off, relay contact tripping, L lines cannot access C3,
The midpoints C6, voltage-doubling boost circuit cannot be formed, and rectified voltage is exported.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
Drop of the electricity after BD2, D7, C4 rectifying and wave-filtering by being formed by R1, Q2, D6, ZD7, R21, R22, R15 is taken by L/N
Press regulator circuit by voltage stabilization in predetermined value.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
Input voltage is detected by the input voltage detection circuit that R21, R22, R14, R9 divider resistance are formed.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
The base stage of triode Q12 is terminated on R9, the conducting voltage of triode corresponds to the set point of input voltage.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
R11, C1, ZD8, C20, R6, Q1 are after circuit coil driving circuit.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
ZD1 is drop-down zener diode, and when Q12 is connected, by ZD1 by the voltage pull-down of C1, ZD8 ends, and Q1 is also cut
Only, relay contact tripping, electronic switch disconnect, and two voltage doubling rectifying circuit is stopped.
Wherein, it should be compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting
When voltage, relay coil driving circuit starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is high
When setting voltage, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
When AC-input voltage is less than setting voltage, Q12 cut-offs, ZD1 ends, ZD8 conductings, Q1 conductings, and relay touches
Point is attracted, two voltage doubling rectifying circuit work.
High-low pressure provided by the invention automatically switches electronic switching circuit, including：Switching circuit control section is in low electricity
Low current weak current part is pressed, L or N forceful electric power circuits is turned on and off by controlling actuation or the relieving of the contact of relay, wraps
It includes and is compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting voltage, relay
Coil driver starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage,
Relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and realizes that reliability wants long-range to reach
In the silicon-controlled electronic switch of existing scheme, a kind of reliable, inexpensive, automatic electronic switching circuit of intelligence is realized.
High-low pressure provided by the invention automatically switches electronic switching circuit, takes electricity after BD2, D7, C4 rectifying and wave-filtering by L/N
By the decompression voltage regulator that is formed by R1, Q2, D6, ZD7, R21, R22, R15 by voltage stabilization in such as 24VDC or so.
High-low pressure provided by the invention automatically switches electronic switching circuit, when low AC voltage inputs such as 110VAC, after
L lines are then connected into the midpoint C3, C6 by appliance contact closure, and the voltage superposition on identical rectified voltage C3 is on the voltage of C6, i.e.,
Two multiplication of voltages, such as from about 310VDC or so are formed, close to 220VAC input rectifying voltages.
High-low pressure provided by the invention automatically switches electronic switching circuit, when ac high voltage input such as 220VAC, this
The Q1 cut-offs of switching circuit switch, relay contact tripping, L lines cannot access the midpoint C3, C6, and voltage-doubling boost circuit cannot be formed,
Export rectified voltage such as from about 310VDC.
High-low pressure provided by the invention automatically switches electronic switching circuit, can be used for the voltage-doubling boost circuit of Switching Power Supply
In, it can also be used to it is highly practical in other under-voltage or overvoltage crowbar, it is at low cost, stablize safe and reliable.
High-low pressure provided by the invention automatically switches electronic switching circuit, and power supply therein is in entire high-low pressure input range
Interior transformer inputs voltage keeps high pressure floating range little, and transformer is caused to be maintained at work in entire input voltage range
When high efficiency convert, it is energy-saving.
In several embodiments provided by the present invention, it should be understood that disclosed circuit can pass through others
Mode is realized.For example, circuit implementation described above is only schematical, for example, the division of circuit or component,
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple circuits or component can
To combine or be desirably integrated into another circuit system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be by some interfaces, between circuit or component
Coupling or communication connection are connect, can be electrical, machinery or other forms.
The component illustrated as separating component may or may not be physically separated, as assembly of elements
Component or circuit may or may not be physical unit, you can be located at a place, or can also be distributed
Onto multiple circuit units.Some or all of circuit or component therein can be selected according to the actual needs to realize this
The purpose of embodiment scheme.
In addition, each functional circuit in each embodiment of the present invention can be integrated in a processing circuit, also may be used
To be that each unit circuit or component physically exist alone, can also two or more element circuits or component it is integrated
In an element circuit or component.The form that hardware may be used in above-mentioned integrated element circuit or component is realized.
If integrated element circuit or component are realized in the form of hardware function units and as independent product pins
It sells or in use, can be stored in a computer read/write memory medium.Based on this understanding, technical side of the invention
Substantially all or part of the part that contributes to existing technology or the technical solution can be produced case with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions are used so that one
Platform computer equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute sheet
Invent all or part of step of each embodiment scheme.And storage medium above-mentioned includes：USB flash disk, read-only is deposited mobile hard disk
Reservoir (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or
The various media that can store program code such as CD.
The foregoing is merely the section Examples of the present invention, are not intended to limit protection scope of the present invention, every utilization
Equivalent device or equivalent process transformation made by description of the invention and accompanying drawing content are applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of high-low pressure automatically switches electronic switching circuit, which is characterized in that including：
Switching circuit control section is the actuation or relieving of the contact by controlling relay in low-voltage low current weak current part
To turn on and off L or N forceful electric power circuits.
2. high-low pressure as described in claim 1 automatically switches electronic switching circuit, which is characterized in that the switching circuit control
Part is to turn on and off L or N by controlling actuation or the relieving of the contact of relay in low-voltage low current weak current part
Forceful electric power circuit, including：
It is compared with reference voltage by the voltage after detection AC rectification, when exchange input is less than setting voltage, relay
Device coil driver starts, and relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage
When, relay coil no current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped.
3. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, including：
When switching circuit work, L lines are then connected into the midpoint C3, C6 by relay contact closure, on identical rectified voltage C3
Voltage superposition on the voltage of C6, formed two multiplication of voltages.
4. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
When ac high voltage inputs, the switching circuit switch Q1 cut-offs, relay contact tripping, L lines cannot access C3, C6
Midpoint, voltage-doubling boost circuit cannot be formed, and rectified voltage is exported.
5. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
Take electricity steady by the decompression formed by R1, Q2, D6, ZD7, R21, R22, R15 after BD2, D7, C4 rectifying and wave-filtering by L/N
Volt circuit is by voltage stabilization in predetermined value.
6. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
Input voltage is detected by the input voltage detection circuit that R21, R22, R14, R9 divider resistance are formed.
7. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
The base stage of triode Q12 is terminated on R9, the conducting voltage of triode corresponds to the set point of input voltage.
8. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
R11, C1, ZD8, C20, R6, Q1 are after circuit coil driving circuit.
9. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be exchanged by detecting
Voltage after rectification is compared with reference voltage, and when exchange input is less than setting voltage, relay coil driving circuit opens
Dynamic, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input is higher than setting voltage, relay coil is without electricity
Stream flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
ZD1 is drop-down zener diode, and when Q12 is connected, by ZD1 by the voltage pull-down of C1, ZD8 ends, and Q1 is also switched off, after
Appliance contact tripping, electronic switch disconnect, and two voltage doubling rectifying circuit is stopped.
10. high-low pressure as claimed in claim 2 automatically switches electronic switching circuit, which is characterized in that described to be handed over by detecting
Voltage after stream rectification is compared with reference voltage, when exchange input is less than setting voltage, relay coil driving circuit
Start, relay contact is attracted, the work of two voltage-doubling boost circuits；When exchange input higher than setting voltage when, relay coil without
Electric current flows through, and contact is unclamped, and two voltage-doubling boost circuits are stopped, and further include：
When AC-input voltage is less than setting voltage, Q12 cut-offs, ZD1 ends, ZD8 conductings, Q1 conductings, and relay contact is inhaled
It closes, two voltage doubling rectifying circuit work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810505294.1A CN108768357B (en) | 2018-05-24 | 2018-05-24 | High-low voltage automatic switching electronic switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810505294.1A CN108768357B (en) | 2018-05-24 | 2018-05-24 | High-low voltage automatic switching electronic switch circuit |
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| Publication Number | Publication Date |
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| CN108768357A true CN108768357A (en) | 2018-11-06 |
| CN108768357B CN108768357B (en) | 2024-05-14 |
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| CN201810505294.1A Active CN108768357B (en) | 2018-05-24 | 2018-05-24 | High-low voltage automatic switching electronic switch circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111328795A (en) * | 2020-02-27 | 2020-06-26 | 李光辉 | Novel electronic mouse trapping device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101414193A (en) * | 2007-10-16 | 2009-04-22 | 鸿富锦精密工业（深圳）有限公司 | Power supply automatic switchover circuit |
| DE102009008432A1 (en) * | 2009-02-11 | 2010-08-12 | Robert Bosch Gmbh | Low voltage supply device for e.g. gas thermal controller, has transformer comprising primary winding such that transformer is adapted for performance requirement of electrical devices |
| CN201623677U (en) * | 2010-02-09 | 2010-11-03 | 中山大洋电机制造有限公司 | Control circuit of single-phase alternating-current motor for clothes dryers |
| CN201922151U (en) * | 2010-09-10 | 2011-08-10 | 吴敏 | Automatic regulation controller of power supply of alternating current electric welding machine |
| CN207269145U (en) * | 2017-09-07 | 2018-04-24 | 杭州优迈科技有限公司 | A kind of protection circuit against input over-voltage for Switching Power Supply |
| CN208691209U (en) * | 2018-05-24 | 2019-04-02 | 深圳日辉达电源股份有限公司 | A kind of high-low pressure automatic switchover electronic switching circuit |
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2018
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|---|---|---|---|---|
| CN101414193A (en) * | 2007-10-16 | 2009-04-22 | 鸿富锦精密工业（深圳）有限公司 | Power supply automatic switchover circuit |
| DE102009008432A1 (en) * | 2009-02-11 | 2010-08-12 | Robert Bosch Gmbh | Low voltage supply device for e.g. gas thermal controller, has transformer comprising primary winding such that transformer is adapted for performance requirement of electrical devices |
| CN201623677U (en) * | 2010-02-09 | 2010-11-03 | 中山大洋电机制造有限公司 | Control circuit of single-phase alternating-current motor for clothes dryers |
| CN201922151U (en) * | 2010-09-10 | 2011-08-10 | 吴敏 | Automatic regulation controller of power supply of alternating current electric welding machine |
| CN207269145U (en) * | 2017-09-07 | 2018-04-24 | 杭州优迈科技有限公司 | A kind of protection circuit against input over-voltage for Switching Power Supply |
| CN208691209U (en) * | 2018-05-24 | 2019-04-02 | 深圳日辉达电源股份有限公司 | A kind of high-low pressure automatic switchover electronic switching circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111328795A (en) * | 2020-02-27 | 2020-06-26 | 李光辉 | Novel electronic mouse trapping device |
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| Publication number | Publication date |
|---|---|
| CN108768357B (en) | 2024-05-14 |
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