CN203086348U - AC voltage stabilizing circuit of no-power transformer - Google Patents
AC voltage stabilizing circuit of no-power transformer Download PDFInfo
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- CN203086348U CN203086348U CN 201220521483 CN201220521483U CN203086348U CN 203086348 U CN203086348 U CN 203086348U CN 201220521483 CN201220521483 CN 201220521483 CN 201220521483 U CN201220521483 U CN 201220521483U CN 203086348 U CN203086348 U CN 203086348U
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Abstract
The utility model discloses an AC voltage stabilizing circuit of a no-power transformer. The AC voltage stabilizing circuit of the no-power transformer mainly comprises a switch circuit, a voltage detection circuit, a rectifying circuit, an isolating driving circuit, a synchronous control circuit, a pulse width modulation circuit and a driving circuit. In the AC voltage stabilizing circuit of the no-power transformer, a capacitor is used to store energy, a voltage synchronous detection circuit controls the pulse width modulation circuit to drive the on-off of two self-turning off devices respectively in the positive and negative half cycles of an AC voltage, and the voltage detection circuit transmits a detected output voltage value to the pulse width modulation circuit via a photo-coupler and controls an outputted pulse width; the driving circuit drives the self-turning off devices to realize a pulse width modulation conversion synchronous with the waveform of the AC voltage, at the same time, superposes the electricity energy stored in the capacitor with a power grid voltage in a voltage manner to realize the stable output of the AC voltage. An AC voltage stabilizer made of the circuit enables the resource consumption of metallic copper and silicon steel sheet to be reduced and the environment pollution caused by producing products to be reduced, and can substitute the conventional AC voltage stabilizing circuit within a certain range.
Description
Technical field
The utility model belongs to power electronic technology and apparatus field, especially utilizes the power electronics self-turn-off device alternating current to be carried out the no power supply transformer AC voltage-stabilizing circuit of synchronous conversion.
Background technology
The instability of civil power alternating supply voltage in power supply process can produce harmful effect to power consumption equipment.Special when the voltage fluctuation amplitude is very big, not only can make the power consumption equipment can't operate as normal, also may cause the damage of power consumption equipment.AC voltage regulator is a kind of pressure stabilizing device that relatively stable operating voltage can be provided for power consumption equipment, is widely used in the equipment in fields such as industrial traffic, national defence, railway and scientific research.Existing AC voltage regulator all is to adopt power transformer to adjust the purpose that voltage reaches voltage stabilizing through control circuit.As the power transformer of the primary parts of AC voltage regulator, need a large amount of copper conductors and silicon steel sheet during owing to manufacturing, and when copper smelting lead and silicon steel sheet, will consume a large amount of heat energy, therefore will greatly consume the limited resources and the energy; On the other hand, in certain range of capacity, the capacity and the weight of transformer is directly proportional (volt-ampere/kilogram), so shortcomings such as AC voltage regulator ubiquity volume is big, weight is big, loss height.It is particularly outstanding that these deficiencies seem in the low-carbon economy of advocating at present, so adopt technological means to find the substitute of transformer under certain limit and condition, is the problem that the current power electronic technology field needs to be resolved hurrily.
The utility model content
At the deficiency of existing AC voltage regulator, the technical problems to be solved in the utility model is that a kind of no power supply transformer AC voltage-stabilizing circuit is provided.This circuit adopts capacitor stores energy, utilize in the power electronics power self-turn-off device (transistor, GTO, IGBT and VMOSFET) but turn-off characteristic, form switching circuit.It is logical and disconnected to drive two self-turn-off devices respectively by voltage sync detection circuit control pulse-width modulation circuit in the alternating current positive and negative half period, voltage detecting circuit is passed to pulse-width modulation circuit with detected output voltage values through the light idol, the pulse duration of control output, realize and the synchronous pulse-width modulation conversion of alternating voltage waveform by the self-turn-off device in the drive circuit driving switch circuit, the electric energy that will be stored in simultaneously in the capacitor superposes with voltage form and line voltage, to realize the stable of output AC voltage.
The technical scheme that the utility model solve the technical problem is, design a kind of no power supply transformer AC voltage-stabilizing circuit, this circuit mainly comprises switching circuit, voltage detecting circuit, rectification circuit, isolated drive circuit, synchronization control circuit, pulse-width modulation circuit and drive circuit.Described switching circuit is made of self-turn-off device T1 and T2, diode D1, D2, D3 and D4, energy storage capacitor C2 and C3, output filter capacitor C4 and output inductor L2; Described voltage detecting circuit is made of resistance R and luminous tube G1; Described rectification circuit is made of control transformer B and regulator rectifier circuit E1 and E2; Described isolated drive circuit is made of receiving tube G2`; Described pulse-width modulation circuit is made of receiving tube G1`, controller PWM.The control utmost point b1 of self-turn-off device T1 in the described switching circuit links to each other with the output r of described drive circuit, the negative pole of regulator rectifier circuit E2 in the negative electrode of self-turn-off device T1 and the described rectification circuit links to each other, the control utmost point b2 of self-turn-off device T2 in the described switching circuit links to each other with the output q of described isolated drive circuit, and the negative pole of the regulator rectifier circuit E1 in the negative electrode of self-turn-off device T2 and the described rectification circuit links to each other; One end of the resistance R in the output inductor L2 in the described switching circuit and the described voltage detecting circuit links to each other; Two lead-in wires of the primary coil of the control transformer B in the described rectification circuit, a lead-in wire meets common port N, and another root lead-in wire links to each other with power supply terminal through filter inductance L1, and the other end of filter inductance L1 links to each other with filtering capacitor C1; Two windings of the secondary coil of control transformer B are connected respectively to regulator rectifier circuit E1 and E2, the both positive and negative polarity of regulator rectifier circuit E1 is connected respectively to described isolated drive circuit, and the both positive and negative polarity of regulator rectifier circuit E2 is connected respectively to described synchronization control circuit, described pulse-width modulation circuit and described drive circuit; The a end of control transformer B in the c of described synchronization control circuit end and the described rectification circuit links to each other, and the b end of control transformer B is held with the d of described synchronization control circuit and linked to each other; The e end of synchronization control circuit links to each other with the g end of the described pulse-width modulation circuit of pulse-width modulation circuit, the f end of described synchronization control circuit links to each other with the h end of described pulse-width modulation circuit, and the i end of described pulse-width modulation circuit is connected to the j end of described drive circuit; Luminous tube G1 in the described voltage detecting circuit and the receiving tube G1` in the described pulse-width modulation circuit are coupled, and the receiving tube G2` of described pulse-width modulation circuit in luminous tube G2 and described isolated drive circuit is coupled.
In such scheme, described switching circuit is made up of two branch roads of positive and negative half period, in the positive half period branch road, the negative pole of diode D1 is with after the end of energy storage capacitor C2 is connected, anode with self-turn-off device T1 is connected again, the other end of capacitor C2 is connected with common port N, the negative electrode of self-turn-off device T1 and anode reverse parallel connection have diode D2, the negative electrode of self-turn-off device T1 is connected to the end of output inductor L2, the other end of output inductor L2 is connected with the end of output filter capacitor C4, and the other end of C4 is connected with common port N; In the negative half-cycle branch road, the positive pole of diode D3 is with after the end of energy storage capacitor C3 is connected, negative electrode with self-turn-off device T2 is connected again, the other end of energy storage capacitor C3 is connected with common port, the negative electrode of self-turn-off device T2 and anode reverse parallel connection have diode D4, the anode of self-turn-off device T2 is connected to the end of output inductor L2, the other end of output inductor L2 is connected with the end of output filter capacitor C4, and the other end of output filter capacitor C4 is connected with common port N.
In such scheme, self-turn-off device T1 and T2 in two branch roads of positive and negative half period in the described switching circuit are to synchronous working with alternating voltage as follows.In (0-π) interval of alternating voltage waveform, being sent with 0 by described pulse-width modulation circuit is that starting point, pulse duration are the driving current potential of β, drives self-turn-off device T1 conducting through described drive circuit; In (π-2 π) interval of alternating voltage, being sent with the π point by described pulse-width modulation circuit is that starting point, pulse duration are the driving current potential of β, drives self-turn-off device T2 conducting through described isolated drive circuit.
In such scheme, described voltage detecting circuit is connected with luminous tube G1 by resistance R, and an end of resistance R is connected to output LM, and the other end of resistance R links to each other with the anode of luminous tube G1, and the negative electrode of luminous tube G1 is connected with the common port N of output.
In such scheme, after a end of the secondary coil of the control transformer B of described synchronization control circuit in the described rectification circuit and b hold and take the synchronizing potential of alternating voltage, in the alternating current positive and negative half period, pass to described pulse-width modulation circuit respectively, as the locking control voltage of two self-turn-off device conducting controls.
In such scheme, described voltage detecting circuit will detect the magnitude of voltage of load FZ, after the photoelectrical coupler coupling of luminous tube G1 and receiving tube G1` composition, voltage signal is passed to controller PWM in the described pulse-width modulation circuit, pulse duration by controller pwm voltage signal, voltage signal divides two-way output, and one the tunnel exports to described drive circuit drives the interior self-turn-off device T1 switch work of described switching circuit; The voltage signal of another road output is passed to described isolated drive circuit and is amplified after the photoelectrical coupler coupling of luminous tube G2 and adopter G2` composition, drives the self-turn-off device T2 switch work in the described switching circuit.
The operation principle of this circuit: during circuit working, alternating current is inserted by input L and common port N, after the input filter circuit filtering of input filter inductance L1 and input filter condenser C1 composition, is the power supply of switching circuit positive and negative half period branch road.The positive half period electric energy of switching circuit is stored among the energy storage capacitor C2 through diode D1, the terminal voltage value of the detected load FZ of voltage detecting circuit, after the photoelectrical coupler coupling of luminous tube G1 and receiving tube G1` composition, pass to the controller PWM in the pulse-width modulation circuit, pulse-width modulation circuit output is starting point with 0 of alternating voltage waveform, pulse duration is the voltage signal of β, through drive circuit work of the self-turn-off device T1 switch in the driving switch circuit in alternating current (0-π) is interval, the T1 shutdown moment, the electric energy that is stored in the inductance L 2 is discharged into energy storage capacitor C2 through diode D2; The negative half-cycle electric energy of switching circuit is stored among the energy storage capacitor C3 through diode D2, the terminal voltage value of the detected load FZ of voltage detecting circuit, after the photoelectrical coupler coupling of luminous tube G2 and receiving tube G2` composition, pass to the controller PWM in the pulse-width modulation circuit, pulse-width modulation circuit output is starting point with the π point of alternating voltage waveform, pulse duration is the voltage signal of β, through isolated drive circuit work of the self-turn-off device T2 switch in the driving switch circuit in alternating current (π-2 π) is interval, the T2 shutdown moment, the electric energy that is stored in the inductance L 2 is discharged into energy storage capacitor C3 through diode D4.When line voltage was lower than stable voltage, the electric energy of energy storage capacitor C2 and C3 stored was superimposed with the voltage of voltage form and electrical network, reaches load voltage value; When line voltage is higher than load voltage value, the self-turn-off device T1 of switching circuit and the ON time of T2 can be adjusted to certain certain value respectively automatically in the alternating current positive and negative half period, after output inductor L2 and output filter capacitor C4 filtering, work with alternating voltage positive and negative half period wave period formula, and then the mean value of realizing alternating voltage is stable, pulse duration β is wide more, and the voltage of output is high more.
Filter inductance L1 and L2 also play the excessive effect of moment of restriction electric current in circuit, with protection self-turn-off device and diode, reduce the impact to electrical network simultaneously.
The filter inductance L1 of this circuit and the inductance value of L2 are less, and the magnet ring or the porcelain jar that can adopt soft magnetic material to make are made.As filter inductance L1 and L2 are arranged to radome, because this circuit does not contain power transformer, but therefore anti-electromagnetic-radiation is specially adapted to the attack of anti-ELECTROMAGNETIC BOMB and army's electricity consumption equipment of electromagnetic interference.
Utilize the utility model no power supply transformer AC voltage-stabilizing circuit as a unit, carry out multiple unit combination after, can obtain heterogeneous no power supply transformer AC voltage-stabilizing circuit.
Usefulness of the present utility model is: the no power supply transformer AC voltage-stabilizing circuit, reduced the volume and weight of circuit, and improved power-efficient, can substitute existing AC voltage-stabilizing circuit within the specific limits.Owing to do not contain power transformer in the circuit, therefore the AC stabilizer made from this circuit can reduce the consumption of metallic copper and silicon steel sheet resource, reduces the pollution to environment of producing product.
Description of drawings:
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further details.
Fig. 1 is the circuit theory diagrams of no power supply transformer AC stabilizer
Number in the figure:
1 switching circuit
2 voltage detecting circuits
3 rectification circuits
4 isolated drive circuits
5 synchronization control circuits
6 pulse-width modulation circuits
7 drive circuits
Embodiment
The utility model is a kind of no power supply transformer AC voltage-stabilizing circuit, Fig. 1 is the circuit theory diagrams that utilize a kind of no power supply transformer AC stabilizer of the utility model enforcement, this circuit is by input L, common port N, input filter inductance L1, input filter condenser C1, switching circuit 1, voltage detecting circuit 2, rectification circuit 3, isolated drive circuit 4, synchronization control circuit 5, pulse-width modulation circuit 6, drive circuit 7, output inductor L2 and output filter capacitor C4 constitute.
During this device work, alternating current is inserted by input L and common port N, after the input filter circuit filtering of input filter inductance L1 and input filter condenser C1 composition, is two branch roads power supplies of positive and negative half period of switching circuit 1.The positive half period electric energy of switching circuit 1 is stored among the energy storage capacitor C2 through diode D1, the terminal voltage value of voltage detecting circuit 2 detected load FZ, after the photoelectrical coupler coupling that receiving tube G1` in luminous tube G1 and pulse-width modulation circuit 6 forms, pass to the controller PWM in the pulse-width modulation circuit 6, pulse-width modulation circuit 6 output is starting point with 0 of alternating voltage waveform, pulse duration is the voltage signal of β, through drive circuit 7 work of the self-turn-off device T1 switch in the driving switch circuit 1 in alternating current (0-π) is interval, when the T1 shutdown moment, the electric energy that is stored in the output inductor L2 is discharged into energy storage capacitor C2 through diode D2; The negative half-cycle electric energy of switching circuit 1 is stored among the energy storage capacitor C3 through diode D2, the terminal voltage value of voltage detecting circuit 2 detected load FZ, after the photoelectrical coupler coupling that receiving tube G2` in luminous tube G2 and isolated drive circuit 4 forms, pass to the controller PWM in the pulse-width modulation circuit 6, pulse-width modulation circuit 6 outputs are starting point with the π point of alternating voltage waveform, pulse duration is the voltage signal of β, through isolated drive circuit 4 work of the self-turn-off device T2 switch in the driving switch circuit 1 in alternating current (π-2 π) is interval, when the T2 shutdown moment, the electric energy that is stored in the output inductor L2 is discharged into energy storage capacitor C3 through diode D4.
When line voltage was lower than stable voltage, the electric energy of energy storage capacitor C2 and C3 stored was superimposed with the voltage of voltage form and electrical network, reaches load voltage value; When line voltage is higher than load voltage value, the self-turn-off device T1 of switching circuit and the ON time of T2 can be adjusted to certain certain value respectively automatically in the alternating current positive and negative half period, after output inductor L2 and output filter capacitor C4 filtering, work with alternating voltage positive and negative half period wave period formula, and then the mean value of realizing alternating voltage is stable, pulse duration β is wide more, and the voltage of output is high more.
Utilize the utility model no power supply transformer AC voltage-stabilizing circuit as a unit, carry out the multiple unit combination, can obtain heterogeneous no circuit transformer AC voltage-stabilizing circuit, produce heterogeneous no power supply transformer AC stabilizer.
The filter inductance L1 of this device and the inductance value of L2 are less, can adopt soft magnetic material magnet ring or porcelain jar to make, after filter inductance L1 and L2 are shielded, but this device anti-electromagnetic-radiation then is specially adapted to the army's electrical installation that prevents that ELECTROMAGNETIC BOMB and electromagnetic interference from attacking.
With the no power supply transformer AC stabilizer that the utility model is made, volume and weight is 1/5th of existing AC voltage regulator volume and weight approximately; Power-efficient is 95-98%, and more existing AC voltage regulator technical efficiency doubles many, can substitute existing AC voltage regulator within the specific limits; Reduced noise and electromagnetic radiation, can anti-electromagnetic interference, the army's of being specially adapted to electrical installation; Reduced the consumption of metallic copper and silicon steel sheet resource, reduced and produced the pollution level to environment of product, thereby protected environment.
Claims (3)
1. no power supply transformer AC voltage-stabilizing circuit, it is characterized in that: this circuit mainly comprises switching circuit (1), voltage detecting circuit (2), rectification circuit (3), isolated drive circuit (4), synchronization control circuit (5), pulse-width modulation circuit (6) and drive circuit (7); Described switching circuit (1) is made up of two branch roads of positive and negative half period, in the positive half period branch road, the negative pole of diode D1 is with after the end of energy storage capacitor C2 is connected, anode with self-turn-off device T1 is connected again, the other end of capacitor C2 is connected with common port N, the negative electrode of self-turn-off device T1 and anode reverse parallel connection have diode D2, the negative electrode of self-turn-off device T1 is connected to the end of output inductor L2, the other end of output inductor L2 is connected with the end of output filter capacitor C4, and the other end of C4 is connected with common port N; In the negative half-cycle branch road, the positive pole of diode D3 is with after the end of energy storage capacitor C3 is connected, negative electrode with self-turn-off device T2 is connected again, the other end of energy storage capacitor C3 is connected with common port, the negative electrode of self-turn-off device T2 and anode reverse parallel connection have diode D4, the anode of self-turn-off device T2 is connected to the end of output inductor L2, the other end of output inductor L2 is connected with the end of output filter capacitor C4, and the other end of output filter capacitor C4 is connected with common port N.
2. no power supply transformer AC voltage-stabilizing circuit according to claim 1, it is characterized in that: after a end of the secondary coil of the control transformer B of described synchronization control circuit (5) in the described rectification circuit (3) and b hold and take the synchronizing potential of alternating voltage, in the alternating current positive and negative half period, pass to described pulse-width modulation circuit (6) respectively, as the locking control voltage of two self-turn-off device conducting controls.
3. no power supply transformer AC voltage-stabilizing circuit according to claim 1, it is characterized in that: described voltage detecting circuit (2) will detect the magnitude of voltage of load FZ, after the photoelectrical coupler coupling of luminous tube G1 and receiving tube G1` composition, voltage signal is passed to the interior controller PWM of described pulse-width modulation circuit (6), pulse duration by controller pwm voltage signal, voltage signal divides two-way output, and one the tunnel exports to described drive circuit (7) drives the interior self-turn-off device T1 switch work of described switching circuit (1); The voltage signal of another road output is passed to described isolated drive circuit (4) and is amplified after the photoelectrical coupler coupling of luminous tube G2 and adopter G2` composition, drives the self-turn-off device T2 switch work in the described switching circuit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220521483 CN203086348U (en) | 2012-10-12 | 2012-10-12 | AC voltage stabilizing circuit of no-power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220521483 CN203086348U (en) | 2012-10-12 | 2012-10-12 | AC voltage stabilizing circuit of no-power transformer |
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| Publication Number | Publication Date |
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| CN203086348U true CN203086348U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220521483 Expired - Fee Related CN203086348U (en) | 2012-10-12 | 2012-10-12 | AC voltage stabilizing circuit of no-power transformer |
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| CN (1) | CN203086348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857114A (en) * | 2012-10-12 | 2013-01-02 | 天津工业大学 | Alternating-current voltage stabilizing circuit of transformer without power supply |
-
2012
- 2012-10-12 CN CN 201220521483 patent/CN203086348U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857114A (en) * | 2012-10-12 | 2013-01-02 | 天津工业大学 | Alternating-current voltage stabilizing circuit of transformer without power supply |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20141012 |
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| EXPY | Termination of patent right or utility model |