CN202550895U - AC stabilized power supply with over-voltage and under-voltage protection function - Google Patents
AC stabilized power supply with over-voltage and under-voltage protection function Download PDFInfo
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- CN202550895U CN202550895U CN2011204275486U CN201120427548U CN202550895U CN 202550895 U CN202550895 U CN 202550895U CN 2011204275486 U CN2011204275486 U CN 2011204275486U CN 201120427548 U CN201120427548 U CN 201120427548U CN 202550895 U CN202550895 U CN 202550895U
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Abstract
The utility model relates to an AC stabilized power supply with over-voltage and under-voltage protection functions. The AC stabilized power supply comprises a rectification unit, a monitoring unit, a voltage stabilization reference unit, a comparison unit and a protection unit that are connected in order. A switch of the protection unit is connected to the AC power supply. A switch output terminal of the protection unit is connected with an AC-DC conversion unit that is used for converting the AC power supply into a stabilized DC power supply. An input terminal of the AC-DC conversion unit is connected with the switch output terminal of the protection unit. An output terminal of the AC-DC conversion unit is connected with an inversion unit and a modulation unit through an inductor L1, an inductor L2 and a capacitor C2`. The AC stabilized power supply is capable of providing sinusoidal AC electric energy with stable frequency and voltage, and can be cut off to stop output if a line inlet voltage is higher than a set maximum voltage or lower than a set minimum voltage.
Description
Technical field
The utility model belongs to the electric prospection technical field, especially a kind of alternating current steady voltage plug with the over-and under-voltage defencive function.
Background technology
In the prior art, a lot of industry, folk power supply environment are abominable.Overvoltage, the under-voltage electricity consumption device damage that makes easily.And electric circuit protection equipment is perfect not enough at present, can not effectively protect electric equipment, cuts off the electricity supply reliably when over-and under-voltage takes place again.
The utility model has related to a kind of alternating current steady voltage plug with the over-and under-voltage defencive function, and this device can be cut off the electricity supply reliably in the moment that over-and under-voltage takes place and protected follow-up power consumption equipment.
The utility model content
The purpose of the utility model is to overcome the shortcoming of above-mentioned prior art, and a kind of alternating current steady voltage plug with the over-and under-voltage defencive function is provided, and this device can be cut off the electricity supply reliably in the moment that over-and under-voltage takes place and protected follow-up power consumption equipment.
The purpose of the utility model solves through following technical scheme:
The alternating current steady voltage plug of this band over-and under-voltage defencive function; Comprise the rectification unit, monitoring means, voltage stabilizing reference cell, comparing unit and the protected location that connect successively; The switch of said protected location is to connecting on the AC power, and the output switching terminal of protected location is connected with the AC-DC conversion unit that AC power is transformed into the galvanic current source; The output switching terminal of the input unit connection protection unit of said AC-DC conversion unit, the output of AC-DC conversion unit is connected with inversion unit and modulating unit through inductance L 1, inductance L 2 and capacitor C 2 '.
Above-mentioned monitoring means is made up of capacitor C 3, resistance R 2, potentiometer RA1, potentiometer RA2, diode D6; Said resistance R 2, potentiometer RA1 and potentiometer RA2 connect successively; The tap terminals ground connection of said potentiometer RA2; One of resistance R 2 is connected on the output high potential of rectification unit, and one of potentiometer RA1 is connected on the output electronegative potential of rectification unit; Said capacitor C 3 is parallelly connected with the series circuit of potentiometer RA1 and potentiometer RA2, and the output of said diode D6 is connected to the tap terminals of potentiometer RA1, the input end grounding of diode D6.
Above-mentioned voltage stabilizing reference cell is made up of direct current regulation circuit, reference voltage circuit and bleeder circuit; Said direct current regulation circuit is connected to form by diode D2, diode D3, diode D4, triode Q1 and resistance R 1, and said reference voltage circuit is made up of resistance R 3, diode D5 and potentiometer VR1; Said bleeder circuit is made up of resistance R 4, resistance R 5 and resistance R 6.
Above-mentioned diode D2, diode D3 and diode D4 contact successively; The output of diode D2 connects the base stage of triode Q1; The collector electrode of triode Q1 is connected on the output high potential of rectification unit, and resistance R 1 is connected between the collector electrode and base stage of triode Q1; Resistance R 3 and diode D5 polyphone; And an end of resistance R 3 connects the emitter of triode Q1, and the input of diode D5 connects cold end, and said diode D5 is also parallelly connected with Vin end and the GND end of potentiometer VR1; Also be connected with capacitor C 4 between the Vin end of potentiometer VR1 and the GND end.Be connected with capacitor C 5 between the Vout end of potentiometer VR1 and the GND end; Resistance R 4, R5 and R6 polyphone, and resistance R 4 one terminate at potentiometer VR1 the Vout end, a termination electronegative potential of resistance R 6.
Above-mentioned comparing unit is formed protected location by amplifier U1A, amplifier U1B, amplifier U1C, amplifier U1D, resistance R 7, resistance R 8, resistance D7 and resistance D9 and is made up of diode D8, diode D10, diode D11, resistance R 10, triode Q2, K switch 1; The electrode input end of said amplifier U1A is connected between resistance R 4 and the resistance R 5, and negative input is connected to the tap terminals of potentiometer RA1; The output of amplifier U1A is connected to the negative input of freight charges U1D; Connect resistance R 7 between the electrode input end of amplifier U1A and the output; The electrode input end of amplifier U1B is connected between resistance R 5 and the resistance R 6, and negative input is connected to the tap terminals of potentiometer RA1, connects resistance R 8 between the electrode input end of amplifier U1B and the output; The electrode input end of said amplifier U1D and amplifier U1C all is connected between resistance R 5 and the resistance R 6; The output of amplifier U1D also is connected to the negative input of amplifier U1C through diode D9; The output of amplifier U1C is connected with the input of diode D8; The output of said diode D8 is connected with an end of resistance R 10; The other end of resistance R 10 is connected with the base stage of triode Q2; The grounded emitter of triode Q2; Also be connected with diode D11 between the base stage of triode Q2 and the emitter, and the input end grounding of diode D11, the collector electrode of said triode Q2 is connected to the emitter of triode Q1 through diode D10.
Above-mentioned inductance L 1, inductance L 2 are connected on the both positive and negative polarity between AC-DC conversion unit and the inversion unit, and capacitor C 2 ' connects and is connected in parallel on the input both positive and negative polarity of inversion unit, and said inversion unit is parallelly connected with modulating unit; And the output of inversion unit is connected with transformer T2, and the output of said modulating unit is connected with transformer T3; The output of said transformer T2 and transformer T3 is connected the output as alternating current steady voltage plug.
The utility model can provide frequency, the stable simple alternating current electric energy of voltage when operate as normal, when primary voltage is higher than the high limit of setting voltage or is lower than the setting voltage lowest limit, can cut off AC power, stops output.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
Referring to Fig. 1, the over-and under-voltage protective device of the utility model comprises the rectification unit PART1, monitoring means PART2, voltage stabilizing reference cell PART3, comparing unit PART4 and the protected location PART5 that connect successively.Rectification unit PART1 is transformed into alternating current the direct current that is proportional to supply power voltage; The switch of said protected location PART5 is to connecting on the AC power, and the output switching terminal of protected location PART5 is connected with the AC-DC conversion unit PART6 that AC power is transformed into the galvanic current source; The output switching terminal of the input unit connection protection unit PART5 of said AC-DC conversion unit PART6, the output of AC-DC conversion unit PART6 is connected with inversion unit PART7 and modulating unit PART8 through inductance L 1, inductance L 2 and capacitor C 2 '.Said inductance L 1, inductance L 2 are connected on the both positive and negative polarity between AC-DC conversion unit PART6 and the inversion unit PART7; Capacitor C 2 ' connection is connected in parallel on the input both positive and negative polarity of inversion unit PART7; The input/output terminal parallel connection of said inversion unit PART7 and modulating unit PART8, and also connect between inversion unit PART7 and the modulating unit PART8; The output of inversion unit PART7 is connected with transformer T2, and the output of said modulating unit PART8 is connected with transformer T3; The output of said transformer T2 and transformer T3 is connected the output as alternating current steady voltage plug.
Above AC-DC conversion unit PART6 AC power L2 is transformed into the galvanic current source; Power component IGBT among the inversion unit PART7 through the phase place and the width control of conducting, shutoff, is reverse into direct voltage the sinusoidal voltage output of 50Hz; Modulating unit PART8 produces width-modulation pulse, the power component IGBT among the drive inverse unit PART7 through Voltage Feedback.
Below introduce in detail the circuit connecting relation of each unit of forming the utility model:
Said monitoring means PART2 is made up of capacitor C 3, resistance R 2, potentiometer RA1, potentiometer RA2, diode D6; Said resistance R 2, potentiometer RA1 and potentiometer RA2 connect successively; The tap terminals ground connection of said potentiometer RA2; One of resistance R 2 is connected on the output high potential of rectification unit PART1, and one of potentiometer RA1 is connected on the output electronegative potential of rectification unit PART1; Said capacitor C 3 is parallelly connected with the series circuit of potentiometer RA1 and potentiometer RA2, and the output of said diode D6 is connected to the tap terminals of potentiometer RA1, the input end grounding of diode D6.V1 among the detecting unit PART2 is the line voltage monitoring point.
Voltage stabilizing reference cell PART3 is made up of direct current regulation circuit, reference voltage circuit and bleeder circuit; Said direct current regulation circuit is connected to form by diode D2, diode D3, diode D4, triode Q1 and resistance R 1, and said reference voltage circuit is made up of resistance R 3, diode D5 and potentiometer VR1; Said bleeder circuit is made up of resistance R 4, resistance R 5 and resistance R 6.Said diode D2, diode D3 and diode D4 contact successively; The output of diode D2 connects the base stage of triode Q1; The collector electrode of triode Q1 is connected on the output high potential of rectification unit PART1, and resistance R 1 is connected between the collector electrode and base stage of triode Q1; Resistance R 3 and diode D5 polyphone; And an end of resistance R 3 connects the emitter of triode Q1, and the input of diode D5 connects cold end, and said diode D5 is also parallelly connected with Vin end and the GND end of potentiometer VR1; Also be connected with capacitor C 4 between the Vin end of potentiometer VR1 and the GND end.Be connected with capacitor C 5 between the Vout end of potentiometer VR1 and the GND end; Resistance R 4, R5 and R6 polyphone, and resistance R 4 one terminate at potentiometer VR1 the Vout end, a termination electronegative potential of resistance R 6.R4, R5, R6 bleeder circuit provide reference voltage V 2, V3.
Comparing unit PART4 is made up of amplifier U1A, amplifier U1B, amplifier U1C, amplifier U1D, resistance R 7, resistance R 8, resistance D7 and resistance D9; Protected location PART5 is made up of diode D8, diode D10, diode D11, resistance R 10, triode Q2, K switch 1; The electrode input end of said amplifier U1A is connected between resistance R 4 and the resistance R 5, and negative input is connected to the tap terminals of potentiometer RA1; The output of amplifier U1A is connected to the negative input of freight charges U1D; Connect resistance R 7 between the electrode input end of amplifier U1A and the output; The electrode input end of amplifier U1B is connected between resistance R 5 and the resistance R 6, and negative input is connected to the tap terminals of potentiometer RA1, connects resistance R 8 between the electrode input end of amplifier U1B and the output; The electrode input end of said amplifier U1D and amplifier U1C all is connected between resistance R 5 and the resistance R 6; The output of amplifier U1D also is connected to the negative input of amplifier U1C through diode D9; The output of amplifier U1C is connected with the input of diode D8; The output of said diode D8 is connected with an end of resistance R 10; The other end of resistance R 10 is connected with the base stage of triode Q2; The grounded emitter of triode Q2; Also be connected with diode D11 between the base stage of triode Q2 and the emitter, and the input end grounding of diode D11, the collector electrode of said triode Q2 is connected to the emitter of triode Q1 through diode D10.K switch 1 is connected between electrical appliance and the power supply, and the control end of K switch 1 is connected the two ends of diode D10.
The utility model can be applicable to industry; Also go for civilian power consumption equipment; It can be cut off the electricity supply reliably in the moment that over-and under-voltage takes place and protect follow-up power consumption equipment, thereby has guaranteed the safe operation of electric equipment under industry or the folk power supply adverse circumstances.
Claims (6)
1. alternating current steady voltage plug with the over-and under-voltage defencive function; It is characterized in that; Comprise the rectification unit (PART1), monitoring means (PART2), voltage stabilizing reference cell (PART3), comparing unit (PART4) and the protected location (PART5) that connect successively; The switch of said protected location (PART5) is to connecting on the AC power, and the output switching terminal of protected location (PART5) is connected with the AC-DC conversion unit (PART6) that AC power is transformed into the galvanic current source; The output switching terminal of the input unit connection protection unit (PART5) of said AC-DC conversion unit (PART6), the output of AC-DC conversion unit (PART6) is connected with inversion unit (PART7) and modulating unit (PART8) through inductance L 1, inductance L 2 and capacitor C 2 '.
2. the alternating current steady voltage plug of band over-and under-voltage defencive function according to claim 1; It is characterized in that; Said monitoring means (PART2) is made up of capacitor C 3, resistance R 2, potentiometer RA1, potentiometer RA2, diode D6; Said resistance R 2, potentiometer RA1 and potentiometer RA2 connect successively; The tap terminals ground connection of said potentiometer RA2, one of resistance R 2 are connected on the output high potential of rectification unit (PART1), and one of potentiometer RA1 is connected on the output electronegative potential of rectification unit (PART1); Said capacitor C 3 is parallelly connected with the series circuit of potentiometer RA1 and potentiometer RA2, and the output of said diode D6 is connected to the tap terminals of potentiometer RA1, the input end grounding of diode D6.
3. the alternating current steady voltage plug of band over-and under-voltage defencive function according to claim 2; It is characterized in that; Said voltage stabilizing reference cell (PART3) is made up of direct current regulation circuit, reference voltage circuit and bleeder circuit; Said direct current regulation circuit is connected to form by diode D2, diode D3, diode D4, triode Q1 and resistance R 1, and said reference voltage circuit is made up of resistance R 3, diode D5 and potentiometer VR1; Said bleeder circuit is made up of resistance R 4, resistance R 5 and resistance R 6.
4. the alternating current steady voltage plug of band over-and under-voltage defencive function according to claim 3; It is characterized in that; Said diode D2, diode D3 and diode D4 contact successively; The output of diode D2 connects the base stage of triode Q1, and the collector electrode of triode Q1 is connected on the output high potential of rectification unit (PART1), and resistance R 1 is connected between the collector electrode and base stage of triode Q1; Resistance R 3 and diode D5 polyphone; And an end of resistance R 3 connects the emitter of triode Q1, and the input of diode D5 connects cold end, and said diode D5 is also parallelly connected with Vin end and the GND end of potentiometer VR1; Also be connected with capacitor C 4 between the Vin end of potentiometer VR1 and the GND end.Be connected with capacitor C 5 between the Vout end of potentiometer VR1 and the GND end; Resistance R 4, R5 and R6 polyphone, and resistance R 4 one terminate at potentiometer VR1 the Vout end, a termination electronegative potential of resistance R 6.
5. the alternating current steady voltage plug of band over-and under-voltage defencive function according to claim 4 is characterized in that, said comparing unit (PART4) is made up of amplifier U1A, amplifier U1B, amplifier U1C, amplifier U1D, resistance R 7, resistance R 8, resistance D7 and resistance D9; Protected location (PART5) is made up of diode D8, diode D10, diode D11, resistance R 10, triode Q2, K switch 1; The electrode input end of said amplifier U1A is connected between resistance R 4 and the resistance R 5, and negative input is connected to the tap terminals of potentiometer RA1; The output of amplifier U1A is connected to the negative input of freight charges U1D; Connect resistance R 7 between the electrode input end of amplifier U1A and the output; The electrode input end of amplifier U1B is connected between resistance R 5 and the resistance R 6, and negative input is connected to the tap terminals of potentiometer RA1, connects resistance R 8 between the electrode input end of amplifier U1B and the output; The electrode input end of said amplifier U1D and amplifier U1C all is connected between resistance R 5 and the resistance R 6; The output of amplifier U1D also is connected to the negative input of amplifier U1C through diode D9; The output of amplifier U1C is connected with the input of diode D8; The output of said diode D8 is connected with an end of resistance R 10; The other end of resistance R 10 is connected with the base stage of triode Q2; The grounded emitter of triode Q2; Also be connected with diode D11 between the base stage of triode Q2 and the emitter, and the input end grounding of diode D11, the collector electrode of said triode Q2 is connected to the emitter of triode Q1 through diode D10.
6. the alternating current steady voltage plug of band over-and under-voltage defencive function according to claim 1; It is characterized in that; Said inductance L 1, inductance L 2 are connected on the both positive and negative polarity between AC-DC conversion unit (PART6) and the inversion unit (PART7); Capacitor C 2 ' connection is connected in parallel on the input both positive and negative polarity of inversion unit (PART7) said inversion unit (PART7) and modulating unit (PART8) parallel connection; And the output of inversion unit (PART7) is connected with transformer T2, and the output of said modulating unit (PART8) is connected with transformer T3; The output of said transformer T2 and transformer T3 is connected the output as alternating current steady voltage plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204275486U CN202550895U (en) | 2011-11-01 | 2011-11-01 | AC stabilized power supply with over-voltage and under-voltage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204275486U CN202550895U (en) | 2011-11-01 | 2011-11-01 | AC stabilized power supply with over-voltage and under-voltage protection function |
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| Publication Number | Publication Date |
|---|---|
| CN202550895U true CN202550895U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204275486U Expired - Fee Related CN202550895U (en) | 2011-11-01 | 2011-11-01 | AC stabilized power supply with over-voltage and under-voltage protection function |
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| Country | Link |
|---|---|
| CN (1) | CN202550895U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166175A (en) * | 2013-04-10 | 2013-06-19 | 重庆四联光电科技有限公司 | Input overvoltage protection circuit for light-emitting diode (LED) driving power supply |
| CN107482771A (en) * | 2017-08-01 | 2017-12-15 | 中国电力科学研究院 | A kind of intelligent power method and its intelligent power equipment for supporting power grid operation |
-
2011
- 2011-11-01 CN CN2011204275486U patent/CN202550895U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166175A (en) * | 2013-04-10 | 2013-06-19 | 重庆四联光电科技有限公司 | Input overvoltage protection circuit for light-emitting diode (LED) driving power supply |
| CN103166175B (en) * | 2013-04-10 | 2015-08-19 | 重庆四联光电科技有限公司 | LED drive power protection circuit against input over-voltage |
| CN107482771A (en) * | 2017-08-01 | 2017-12-15 | 中国电力科学研究院 | A kind of intelligent power method and its intelligent power equipment for supporting power grid operation |
| CN107482771B (en) * | 2017-08-01 | 2021-08-27 | 中国电力科学研究院 | Intelligent power utilization method supporting stable operation of power grid and intelligent power utilization equipment thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20161101 |