CN104216449A - Controllable alternating-current stabilized-voltage power supply - Google Patents
Controllable alternating-current stabilized-voltage power supply Download PDFInfo
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- CN104216449A CN104216449A CN201410465522.9A CN201410465522A CN104216449A CN 104216449 A CN104216449 A CN 104216449A CN 201410465522 A CN201410465522 A CN 201410465522A CN 104216449 A CN104216449 A CN 104216449A
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- 238000005070 sampling Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses a controllable alternating-current stabilized-voltage power supply, which is characterized by comprising a transformer T, a rectifying and wave-filtering circuit (1), a driving circuit (2), a sampling circuit (3), a control circuit (4) and a triggering circuit (5), wherein the rectifying and wave-filtering circuit (1) is connected with the secondary side of the transformer T, the driving circuit (2) is connected with the output end of the rectifying and wave-filtering circuit (1), the sampling circuit (3) is connected with the output end of the driving circuit (2), the control circuit (4) is connected with the output end of the sampling circuit (3), and the triggering circuit (5) is connected with the output end of the control circuit (4). According to the controllable alternating-current stabilized-voltage power supply, the voltage of the power supply can be automatically stabilized when the voltage of commercial power is lower, so that household electrical appliances are kept to normally work to avoid the damage to the household electrical appliances.
Description
Technical field
The present invention relates to a kind of circuit, specifically refer to a kind of controllability alternating current steady voltage plug.
Background technology
Along with the continuous progress of science and technology, the quality requirements of people to life is more and more higher, and household electrical appliance are general to be applied in the middle of each family, brings great convenience to people's life.But in use civil power there will be wild effect unavoidably, as low voltage, at this moment circuit output voltage does not then reach the requirement of electrical appliance, thus make electrical appliance cisco unity malfunction, also can damage household electrical appliance time serious, bring unnecessary loss.Impact on household electrical appliance when how to avoid line voltage on the low side is urgent problem.
Summary of the invention
The object of the invention is to solve line voltage unstable, the impact on household electrical appliance when there is low voltage, provide a kind of can the controllability alternating current steady voltage plug of autostable supply voltage protection electrical appliance.
Object of the present invention is achieved through the following technical solutions: a kind of controllability alternating current steady voltage plug, by transformer T, the current rectifying and wave filtering circuit be connected with transformer T secondary, the driving circuit be connected with rectification filter circuit output end, the sample circuit be connected with driving circuit output terminal, the control circuit be connected with sample circuit output terminal, and the trigger circuit be connected with control circuit output terminal form.Wherein, described trigger circuit by relay K 1, relay K 2, the diode D3 be in parallel with relay K 1, and forming with the diode D4 that relay K 2 is in parallel, and the two ends of relay K 1 are all connected with control circuit with the two ends of relay K 2.The former limit of described transformer T is provided with self-coupling tap Y1 and self-coupling tap Y2, the normally closed contact K21 of relay K 2 forms hilted broadsword pair and puts switch between self-coupling tap Y2 and the non-same polarity of former limit telefault, and the normally closed contact K11 of relay K 1 is formed between self-coupling tap Y1 and the output stage of normally closed contact K21, and hilted broadsword is two puts switch; Be formed as power input between the Same Name of Ends of the former limit telefault of described transformer T and self-coupling tap Y1, the Same Name of Ends of transformer T former limit telefault and the output stage of normally closed contact K11 are then formed as power output end.
Further, described current rectifying and wave filtering circuit comprises diode bridge rectifier U, electric capacity C1.Diode bridge rectifier U is serially connected in the two ends of transformer T secondary inductance coil L1, and electric capacity C1 is then serially connected between two output terminals of diode bridge rectifier U, and the positive and negative electrode of described electric capacity C1 is also connected with driving circuit.
Described driving circuit is by driving chip U1, triode VT1, N pole is connected with the VDD pin of driving chip U1 after resistance R2 through resistance R1, the diode D1 that P pole is connected with the collector of triode VT1 with the positive pole of electric capacity C1 simultaneously, one end is connected with the tie point of resistance R2 with resistance R1, the electric capacity C2 that the other end is connected with the negative pole of electric capacity C1, one end is connected with the N pole of diode D1, the resistance R3 that the other end is connected with the SW pin of driving chip U1, one end is connected with the collector of triode VT1, the resistance R5 that the other end is connected with the BD pin of driving chip U1 after resistance R4, one end is connected with the CS pin of driving chip U1, the resistance R6 that the other end is connected with sample circuit with the negative pole of electric capacity C1 simultaneously, and one end is connected with the FB pin of driving chip U1, the other end forms with the resistance R7 that the negative pole of electric capacity C1 is connected with sample circuit simultaneously.The base stage of described triode VT1 is connected with the BD pin of driving chip U1, collector is also connected with sample circuit, emitter is connected with the SW pin of driving chip U1.
Described sample circuit is by resistance R8, resistance R11, resistance R12, the resistance R9 that one end is connected with the N pole of diode D3 with the P pole of diode D1 simultaneously, the other end is connected with the tie point of resistance R7 with resistance R6 after resistance R8, the resistance R10 that one end is connected with the P pole of diode D1, the other end is connected with the tie point of resistance R7 with resistance R6 after resistance R11, and the voltage stabilizing diode D2 that N pole is connected with the P pole of diode D1 after resistance R12, P pole is connected with the tie point of resistance R7 with resistance R6 forms; The N pole of described voltage stabilizing diode D2 is connected with control circuit respectively with P pole; Tie point and the resistance R9 of resistance R10 and resistance R11 are connected with control circuit respectively with the tie point of resistance R8.
Described control circuit comprises operational amplifier J1, operational amplifier J2, resistance R13, resistance R14, resistance R15, resistance R16, triode VT2, triode VT3; Output terminal ground connection after resistance R13, resistance R14 of operational amplifier J1, the base stage of triode VT2 is connected with the tie point of resistance R14 with resistance R13, collector is connected with the P pole of diode D3, grounded emitter, the output terminal of operational amplifier J2 is connected with the emitter of triode VT3 with the P pole of voltage stabilizing diode D2 after resistance R15, resistance R16 simultaneously, and the base stage of triode VT3 is connected with the tie point of resistance R16 with resistance R15, collector is connected with the P pole of diode D4, grounded emitter; The negative pole of described operational amplifier J1 is connected with the tie point of resistance R8 with resistance R9, positive pole is connected with the N pole of voltage stabilizing diode D2; The positive pole of operational amplifier J2 is connected with the positive pole of operational amplifier J1, negative pole is connected with the tie point of resistance R11 with resistance R10.
The present invention compared with prior art has the following advantages and beneficial effect:
1, structure of the present invention is comparatively simple, and cost of manufacture is lower.
2, the present invention compared with prior art compare can when line voltage is on the low side autostable supply voltage, use household electrical appliance to keep normal work.
3, the present invention comparatively prior art compare and can protect electrical appliance, avoid electrical appliance to damage, economize on electrical equipment change or maintenance cost.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, a kind of controllability alternating current steady voltage plug of the present invention, by transformer T, the current rectifying and wave filtering circuit 1 be connected with transformer T secondary, the driving circuit 2 be connected with current rectifying and wave filtering circuit 1 output terminal, the sample circuit 3 be connected with driving circuit 2 output terminal, the control circuit 4 be connected with sample circuit 3 output terminal, and the trigger circuit 5 be connected with control circuit 4 output terminal form.Wherein, described trigger circuit 5 by relay K 1, relay K 2, the diode D3 be in parallel with relay K 1, and forming with the diode D4 that relay K 2 is in parallel, and the two ends of relay K 1 are all connected with control circuit 4 with the two ends of relay K 2; The former limit of described transformer T is provided with self-coupling tap Y1 and self-coupling tap Y2, the normally closed contact K21 of relay K 2 forms hilted broadsword pair and puts switch between self-coupling tap Y2 and the non-same polarity of former limit telefault, and the normally closed contact K11 of relay K 1 is formed between self-coupling tap Y1 and the output stage of normally closed contact K21, and hilted broadsword is two puts switch; Power input is formed as between the Same Name of Ends of the former limit telefault of described transformer T and self-coupling tap Y1, the Same Name of Ends of transformer T former limit telefault and the output stage of normally closed contact K11 are then formed as power output end, namely non-loaded between power input and output terminal.
Described current rectifying and wave filtering circuit 1 comprises diode bridge rectifier U, electric capacity C1; Diode bridge rectifier U is serially connected in the two ends of transformer T secondary inductance coil L1, and electric capacity C1 is then serially connected between two output terminals of diode bridge rectifier U, and the positive and negative electrode of described electric capacity C1 is also connected with driving circuit 2.
Described driving circuit 2 is by driving chip U1, triode VT1, N pole is connected with the VDD pin of driving chip U1 after resistance R2 through resistance R1, the diode D1 that P pole is connected with the collector of triode VT1 with the positive pole of electric capacity C1 simultaneously, one end is connected with the tie point of resistance R2 with resistance R1, the electric capacity C2 that the other end is connected with the negative pole of electric capacity C1, one end is connected with the N pole of diode D1, the resistance R3 that the other end is connected with the SW pin of driving chip U1, one end is connected with the collector of triode VT1, the resistance R5 that the other end is connected with the BD pin of driving chip U1 after resistance R4, one end is connected with the CS pin of driving chip U1, the resistance R6 that the other end is connected with sample circuit 3 with the negative pole of electric capacity C1 simultaneously, and one end is connected with the FB pin of driving chip U1, the other end forms with the resistance R7 that the negative pole of electric capacity C1 is connected with sample circuit 3 simultaneously.The base stage of described triode VT1 is connected with the BD pin of driving chip U1, collector is also connected with sample circuit 3, emitter is connected with the SW pin of driving chip U1.
Described sample circuit 3, for sampling to line voltage, flows to control circuit 4 the signal gathered.It is by resistance R8, resistance R11, resistance R12, the resistance R9 that one end is connected with the N pole of diode D3 with the P pole of diode D1 simultaneously, the other end is connected with the tie point of resistance R7 with resistance R6 after resistance R8, the resistance R10 that one end is connected with the P pole of diode D1, the other end is connected with the tie point of resistance R7 with resistance R6 after resistance R11, and the voltage stabilizing diode D2 that N pole is connected with the P pole of diode D1 after resistance R12, P pole is connected with the tie point of resistance R7 with resistance R6 forms.The N pole of described voltage stabilizing diode D2 is connected with control circuit 4 respectively with P pole; Tie point and the resistance R9 of resistance R10 and resistance R11 are connected with control circuit 4 respectively with the tie point of resistance R8.
Described control circuit 4 comprises operational amplifier J1, operational amplifier J2, resistance R13, resistance R14, resistance R15, resistance R16, triode VT2, triode VT3; Output terminal ground connection after resistance R13, resistance R14 of operational amplifier J1, the base stage of triode VT2 is connected with the tie point of resistance R14 with resistance R13, collector is connected with the P pole of diode D3, grounded emitter, the output terminal of operational amplifier J2 is connected with the emitter of triode VT3 with the P pole of voltage stabilizing diode D2 after resistance R15, resistance R16 simultaneously, and the base stage of triode VT3 is connected with the tie point of resistance R16 with resistance R15, collector is connected with the P pole of diode D4, grounded emitter; The negative pole of described operational amplifier J1 is connected with the tie point of resistance R8 with resistance R9, positive pole is connected with the N pole of voltage stabilizing diode D2; The positive pole of operational amplifier J2 is connected with the positive pole of operational amplifier J1, negative pole is connected with the tie point of resistance R11 with resistance R10.
When civil power is normal, non-loaded between current input terminal and output terminal.When line voltage declines, the output terminal of operational amplifier J1 exports high level, make triode VT2 saturation conduction, relay K 1 obtains electric work, its normally closed contact K11 and the self-coupling tap Y1 on the former limit of transformer T disconnect and being connected with self-coupling tap Y2 simultaneously, at this moment transformer T former limit Same Name of Ends and self-coupling tap Y2 become output terminal, thus adjustment output voltage.When line voltage continues to decline, the output terminal of operational amplifier J2 exports high level, makes triode VT3 saturation conduction, and relay K 2 obtains electric work, and its normally closed contact K21 and self-coupling tap Y2 disconnect and being connected with transformer T former limit non-same polarity simultaneously.At this moment the Same Name of Ends on the former limit of transformer T and non-same polarity then become output terminal, again adjust output voltage, to meet electrical appliance demand.
Otherwise when voltage recovery, the output terminal output low level of operational amplifier J2, triode VT3 not conducting, relay K 2 dead electricity does not work, and its normally closed contact K21 is connected with self-coupling tap Y2 again.When voltage continues to raise, the output terminal output low level of operational amplifier J1, triode VT2 not conducting, relay K 1 dead electricity does not work, and its normally closed contact K11 is connected with self-coupling tap Y1 again, to meet electrical appliance demand.
As mentioned above, just well the present invention can be realized.
Claims (5)
1. a controllability alternating current steady voltage plug, it is characterized in that: by transformer T, the current rectifying and wave filtering circuit (1) be connected with transformer T secondary, the driving circuit (2) be connected with current rectifying and wave filtering circuit (1) output terminal, the sample circuit (3) be connected with driving circuit (2) output terminal, the control circuit (4) be connected with sample circuit (3) output terminal, and the trigger circuit (5) be connected with control circuit (4) output terminal form; Wherein, described trigger circuit (5) by relay K 1, relay K 2, the diode D3 be in parallel with relay K 1, and form with the diode D4 that relay K 2 is in parallel, and the two ends of relay K 1 are all connected with control circuit (4) with the two ends of relay K 2; The former limit of described transformer T is provided with self-coupling tap Y1 and self-coupling tap Y2, the normally closed contact K21 of relay K 2 forms hilted broadsword pair and puts switch between self-coupling tap Y2 and the non-same polarity of former limit telefault, and the normally closed contact K11 of relay K 1 is formed between self-coupling tap Y1 and the output stage of normally closed contact K21, and hilted broadsword is two puts switch; Be formed as power input between the Same Name of Ends of the former limit telefault of described transformer T and self-coupling tap Y1, the Same Name of Ends of transformer T former limit telefault and the output stage of normally closed contact K11 are then formed as power output end.
2. a kind of controllability alternating current steady voltage plug according to claim 1, is characterized in that: described current rectifying and wave filtering circuit (1) comprises diode bridge rectifier U, electric capacity C1; Diode bridge rectifier U is serially connected in the two ends of transformer T secondary inductance coil L1, and electric capacity C1 is then serially connected between two output terminals of diode bridge rectifier U, and the positive and negative electrode of described electric capacity C1 is also connected with driving circuit (2).
3. a kind of controllability alternating current steady voltage plug according to claim 2, it is characterized in that: described driving circuit (2) is by driving chip U1, triode VT1, N pole is connected with the VDD pin of driving chip U1 after resistance R2 through resistance R1, the diode D1 that P pole is connected with the collector of triode VT1 with the positive pole of electric capacity C1 simultaneously, one end is connected with the tie point of resistance R2 with resistance R1, the electric capacity C2 that the other end is connected with the negative pole of electric capacity C1, one end is connected with the N pole of diode D1, the resistance R3 that the other end is connected with the SW pin of driving chip U1, one end is connected with the collector of triode VT1, the resistance R5 that the other end is connected with the BD pin of driving chip U1 after resistance R4, one end is connected with the CS pin of driving chip U1, the resistance R6 that the other end is connected with sample circuit (3) with the negative pole of electric capacity C1 simultaneously, and one end is connected with the FB pin of driving chip U1, the other end forms with the resistance R7 that the negative pole of electric capacity C1 is connected with sample circuit (3) simultaneously, the base stage of described triode VT1 is connected with the BD pin of driving chip U1, collector is also connected with sample circuit (3), emitter is connected with the SW pin of driving chip U1.
4. a kind of controllability alternating current steady voltage plug according to claim 3, it is characterized in that: described sample circuit (3) is by resistance R8, resistance R11, resistance R12, one end is connected with the N pole of diode D3 with the P pole of diode D1 simultaneously, the resistance R9 that the other end is connected with the tie point of resistance R7 with resistance R6 after resistance R8, one end is connected with the P pole of diode D1, the resistance R10 that the other end is connected with the tie point of resistance R7 with resistance R6 after resistance R11, and N pole is connected with the P pole of diode D1 after resistance R12, the voltage stabilizing diode D2 that P pole is connected with the tie point of resistance R7 with resistance R6 forms, the N pole of described voltage stabilizing diode D2 is connected with control circuit (4) respectively with P pole, tie point and the resistance R9 of resistance R10 and resistance R11 are connected with control circuit (4) respectively with the tie point of resistance R8.
5. a kind of controllability alternating current steady voltage plug according to claim 4, is characterized in that: described control circuit (4) comprises operational amplifier J1, operational amplifier J2, resistance R13, resistance R14, resistance R15, resistance R16, triode VT2, triode VT3; Output terminal ground connection after resistance R13, resistance R14 of operational amplifier J1, the base stage of triode VT2 is connected with the tie point of resistance R14 with resistance R13, collector is connected with the P pole of diode D3, grounded emitter, the output terminal of operational amplifier J2 is connected with the emitter of triode VT3 with the P pole of voltage stabilizing diode D2 after resistance R15, resistance R16 simultaneously, and the base stage of triode VT3 is connected with the tie point of resistance R16 with resistance R15, collector is connected with the P pole of diode D4, grounded emitter; The negative pole of described operational amplifier J1 is connected with the tie point of resistance R8 with resistance R9, positive pole is connected with the N pole of voltage stabilizing diode D2; The positive pole of operational amplifier J2 is connected with the positive pole of operational amplifier J1, negative pole is connected with the tie point of resistance R11 with resistance R10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465522.9A CN104216449B (en) | 2014-09-12 | 2014-09-12 | A kind of controllability alternating current steady voltage plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410465522.9A CN104216449B (en) | 2014-09-12 | 2014-09-12 | A kind of controllability alternating current steady voltage plug |
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| Publication Number | Publication Date |
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| CN104216449A true CN104216449A (en) | 2014-12-17 |
| CN104216449B CN104216449B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410465522.9A Expired - Fee Related CN104216449B (en) | 2014-09-12 | 2014-09-12 | A kind of controllability alternating current steady voltage plug |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852613A (en) * | 2015-05-26 | 2015-08-19 | 苏州福利恒电子科技有限公司 | Voltage-stabilizing socket circuit |
| CN108493902A (en) * | 2018-04-13 | 2018-09-04 | 上海航安机场设备有限公司 | A kind of self-protection circuit and system |
| CN109617444A (en) * | 2018-12-30 | 2019-04-12 | 上海广为焊接设备有限公司 | A kind of device adjusting output current scope auto-changing electric welding machine arc voltage |
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2014
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| CN2518136Y (en) * | 2001-10-16 | 2002-10-23 | 深圳市振威电子有限公司 | Electricity saver |
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| CN109617444A (en) * | 2018-12-30 | 2019-04-12 | 上海广为焊接设备有限公司 | A kind of device adjusting output current scope auto-changing electric welding machine arc voltage |
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| CN104216449B (en) | 2016-01-13 |
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