CN202334293U - Power frequency switching power supply - Google Patents
Power frequency switching power supply Download PDFInfo
- Publication number
- CN202334293U CN202334293U CN2011204608728U CN201120460872U CN202334293U CN 202334293 U CN202334293 U CN 202334293U CN 2011204608728 U CN2011204608728 U CN 2011204608728U CN 201120460872 U CN201120460872 U CN 201120460872U CN 202334293 U CN202334293 U CN 202334293U
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- circuit
- low
- connects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 239000003381 stabilizer Substances 0.000 claims description 8
- 230000010349 pulsation Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 44
- 230000005669 field effect Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 24
- 238000007600 charging Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a power frequency switching power supply. The power frequency switching power supply consists of an alternating current power supply, a rectification circuit, a voltage detection circuit, a switching signal circuit, a switching executive circuit, a low-voltage direct current power supply and a load, wherein the voltage detection circuit is used for detecting a voltage value of a pulse high-voltage direct current power supply which is formed by rectifying by the rectification circuit; when the voltage value is lower or higher than a certain set value, the switching signal circuit generates a control signal to control the on or off of a switching tube in the switching executive circuit; the switching tube can be a field-effect tube or triode; and the switching signal circuit consists of the triode, the field-effect tube or an operational amplifier. According to the power frequency switching power supply, a brand-new voltage-reducing method, in addition to a transformer method, a capacitor method, a high-frequency switching power supply method and a resistor method, is generated; moreover, the power frequency switching power supply is simple in circuit structure and low in cost, the increase relationship between the output power and the circuit cost is not obvious, and compared with the existing high-frequency switching power supply, the power frequency switching power supply has very obvious advantages, and can be widely used in the field that a light-emitting diode (LED) energy-saving lamp and the like need a low-voltage direct current power supply.
Description
Affiliated technical field
The utility model relates to a kind of Switching Power Supply, especially uses a kind of with directly using a certain magnitude of voltage of switching tube switch behind the industrial frequency AC electric rectification of switching circuit realization, realizes High Level AC Voltage is become a kind of power frequency Switching Power Supply of low-voltage DC.
Background technology
To High Level AC Voltage be become low-voltage DC; The confession low-voltage load uses, and mainly contains four kinds of methods at present: 1, use transformer that the High Level AC Voltage step-down is become low-voltage AC, again rectifying and wave-filtering; This method is very simple, and the transformer cost is high, heavy, volume is big but use; 2, use capacitance decompression, generally be with capacitances in series in alternating current circuit, utilize the capacitive reactance of electric capacity, make and get high pressure on the electric capacity, load circuit is got relatively low pressure, this method is simple, cost is low, but power is little, volume is big; 3, resistance step-down utilizes the resistance that is connected in the alternating current circuit to get part voltage, and part voltage is got in load, and this method resistance is wanted consumed power, and efficient is low; 4, use high frequency switch power, this method is a kind of very widely method of using at present, but will use high frequency transformer equally, because operating frequency is considerably beyond power frequency, circuit element requires height, complicated circuit, cost height.
The utility model content
Use in order to overcome the existing technology that High Level AC Voltage is become low-voltage DC that the transformer cost is high, heavy, volume is big, use that electric capacity power is little, volume is big, use resistance to want consumed power, efficient low; Use the shortcoming that hf switching power supply is complicated, cost is high, the utility model provides a kind of power frequency Switching Power Supply and solve this problem, it is to form high-voltage DC power supply (Rectified alternating current) after utilizing the power frequency AC rectification; Carry out when utilizing switching tube directly Rectified alternating current to be lower than a certain value and open, carry out when being higher than a certain value and close the formation low-voltage dc power supply; Through after filtering, voltage stabilizing or other processing circuit processes; The confession load is used, and adopting the good effect of the utility model is to have utilized few element; Just can realize a kind of cheap low-voltage dc power supply; And the cost of low-voltage dc power supply and the relation of power output are little, and after promptly power output increased, its circuit cost did not increase or slightly increases.
The utility model solves the technical scheme that its technical problem adopted:
A kind of power frequency Switching Power Supply of the utility model; Form by AC power, rectification circuit, voltage detecting circuit, switching signal circuit, switch executive circuit, low-voltage dc power supply, load; The magnitude of voltage that voltage detecting circuit detects the pulsation high-voltage DC power supply that forms through the rectification circuit rectification is below or above a certain set point, produces control signal by the switching signal circuit and goes the opening or closing of switching tube in the control switch executive circuit; Switching tube can be FET or triode; It connects method and is divided into four kinds of situation: first kind is that switching tube in the switch executive circuit is a FET; The drain electrode of FET connects the positive pole of high-voltage DC power supply; Source electrode connects the positive pole of low-voltage dc power supply, and the negative pole of low-voltage dc power supply connects the negative pole of high-voltage DC power supply; Second kind is that switching tube in the switch executive circuit is a FET, and the drain electrode of FET connects the negative pole of low-voltage dc power supply, and source electrode connects the negative pole of high-voltage DC power supply, and the positive pole of low-voltage dc power supply connects the positive pole of high-voltage DC power supply; The third is that the switching tube in the switch executive circuit is a triode, and the collector electrode of triode connects the positive pole of high-voltage DC power supply, and emitter connects the positive pole of low-voltage dc power supply, and the negative pole of low-voltage dc power supply connects the negative pole of high-voltage DC power supply; The 4th kind is that switching tube in the switch executive circuit is a triode, and the collector electrode of triode connects the negative pole of low-voltage dc power supply, and emitter connects the negative pole of high-voltage DC power supply, and the positive pole of low-voltage dc power supply connects the positive pole of high-voltage DC power supply.The switching signal circuit mainly contains three kinds of constituted modes: first kind is that the switching signal circuit is made up of a triode, and the base stage of the triode in the collector electrode of triode and the switch executive circuit or the grid of the FET in the switch executive circuit are connected; Second kind is that the switching signal circuit is made up of a FET, and the base stage of the triode in the drain electrode of FET and the switch executive circuit or the grid of the FET in the switch executive circuit are connected; The third is that the switching signal circuit is made up of an operational amplifier; One end of one end of a resistance in the positive input terminal of operational amplifier and the voltage detecting circuit, an end of voltage-stabiliser tube, electric capacity links together; Utilize resistance to introduce the direct current of high-voltage DC power supply; Through forming reference voltage after capacitor filtering, the diode voltage stabilizing; Negative input end and insert the centre of two resistance between the both positive and negative polarity be connected on high-voltage DC power supply; Promptly link together with an end of a resistance, an end of another resistance, output directly with the switch executive circuit in the grid of FET be connected or the base stage of passing through the triode in resistance and the switch executive circuit is connected.
The scheme of the utility model will be done to introduce more in detail in description of drawings and embodiment.
Description of drawings
Below in conjunction with accompanying drawing to the utility model brief description.
Fig. 1 is that first kind of cooperating with FET of the utility model FET connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 2 is that second kind of cooperating with FET of the utility model FET connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 3 is that first kind of cooperating with triode of the utility model FET connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 4 is that second kind of cooperating with triode of the utility model FET connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 5 is that first kind of cooperating with FET of the utility model operational amplifier connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 6 is that second kind of cooperating with FET of the utility model operational amplifier connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 7 is that first kind of cooperating with triode of the utility model operational amplifier connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 8 is that second kind of cooperating with triode of the utility model operational amplifier connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Fig. 9 is that first kind of cooperating with FET of the utility model triode connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Figure 10 is that second kind of cooperating with FET of the utility model triode connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Figure 11 is that first kind of cooperating with triode of the utility model triode connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Figure 12 is that second kind of cooperating with triode of the utility model triode connects the method circuit theory diagrams.
1. AC powers among the figure, 2. rectification circuit, 3. voltage detecting circuit, 4. switching signal circuit, 5. switch executive circuit, 6, low-voltage dc power supply, 7, load.
Embodiment
In Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, we are that example further specifies the utility model to implement a kind of power frequency Switching Power Supply:
Fig. 1 is that first kind of cooperating with FET of the utility model FET connects the method circuit theory diagrams, and AC power 1 among the figure (dotted line part) is generally civil power 220V; Rectification circuit 2 (dotted line part) is formed bridge rectifier by diode D1, D2, D3, D4, and alternating current is become Voltage pulsating direct-current supply, and (the compare maximum of high-voltage DC power supply of its voltage is little for the difference low-voltage dc power supply; Little what confirm according to concrete circuit needs); Voltage pulsating direct-current supply after the alternating current conversion is called high-voltage DC power supply, and the just very diode D1 of high-voltage DC power supply, the negative pole junction of D2 and the circuit that directly links together, the negative pole of high-voltage DC power supply are the anodal junction of diode D3, D4 and the circuit (ground connection) that directly links together; Because high-voltage DC power supply is sinusoidal wave positive half cycle; Voltage is not all high all the time, is to change by sinusoidal rule in time, and just its mean value is higher; Can certainly adopt halfwave rectifier, but efficient is low; Voltage detecting circuit 3 (dotted line part) detects the pulsating voltage of high-voltage DC power supply; By R1, R2 dividing potential drop; Offer switching signal circuit 4 (dotted line part) after the W1 pressure limiting, change the size of R1, R2 resistance, can change voltage ratio; R2 is changed to adjustable resistance, then WITH THE ADJUSTABLE INTRINSIC STAND-OFF RATIO; Switching signal circuit 4 is made up of a FET V1, no matter use which type FET, as long as grid voltage is higher than certain value; Conducting just between drain electrode and the source electrode; Its effect is the magnitude of voltage that goes sense voltage testing circuit 3 to detect with grid, when voltage is higher than certain value, and conducting between drain electrode and the source electrode; Be equivalent to produce a switching signal, remove to control the switch executive circuit 5 of back; Switch executive circuit 5 (dotted line part) is made up of FET V2, resistance R 3, voltage-stabiliser tube W2, and the effect of resistance R 3 is a voltage of introducing high-voltage DC power supply, and voltage-stabiliser tube W2 plays the pressure limiting effect; The grid of protection FET V2 certainly if necessary, can directly be made the bias voltage that voltage is more stable for V2; And without pulsating voltage as bias voltage; Better effects if, when the voltage of the FET V1 grid in the switching signal circuit 4 is lower than set point, not conducting between V1 grid source electrode; The V2 grid is a high potential; The conducting of FET V2 grid source electrode is equivalent to switch open, and high-voltage DC power supply is through capacitor C 1 charging of grid source electrode in low-voltage dc power supply 6 (dotted line part) of FET V2; Low-voltage dc power supply 6 (dotted line part) is made up of capacitor C 1, voltage-stabiliser tube W3; The positive pole of the just very low-voltage dc power supply 6 of capacitor C 1; Capacitor C 1 negative pole is the negative pole of low-voltage dc power supply, and in this figure, the positive pole of high-voltage DC power supply is connected with the drain electrode of FET V2; Source electrode is connected with the positive pole of low-voltage dc power supply 6, and the negative pole of low-voltage dc power supply 6 is connected with the negative pole of high-voltage DC power supply.Entire work process is following: AC power 1 becomes high-voltage DC power supply through rectification circuit, when voltage is lower than set point, and not conducting of VT1, VT2 conducting; Capacitor C 1 charging of high-voltage DC power supply in low-voltage dc circuit 6 makes its voltage reach certain value, when the voltage of high-voltage DC power supply rises to certain value, and the VT1 conducting; VT2 closes, and stops the C1 charging in low-voltage dc circuit 6, and this process is gone round and begun again, and makes the voltage of low-voltage dc power supply 6 maintain certain value; And to load 7 power supplies, through test of many times, under the situation of using a plurality of 1 watt of high-powered LED lamp series connection to use; Its magnitude of voltage is changed to 0.1V, to the undemanding load of voltage request, can directly use; Can certainly be the basis with this low-voltage dc power supply, increase constant-current circuit, supply strict load uses such as LED lamp; Load 7 can be electric light, LED electricity-saving lamp, direct current machine even load.
Fig. 2 is that second kind of cooperating with FET of the utility model FET connects the method circuit theory diagrams, with the difference of Fig. 1 be that low-voltage dc power supply 6 and load 7 are connected between the positive pole and FET drain electrode of high-voltage DC power supply; Be the negative pole that the drain electrode of field effect pipe V2 connects low-voltage dc power supply, source electrode connects the negative pole of high-voltage DC power supply, and remainder is identical; Operation principle is identical; Just component parameters is slightly different, and Fig. 1 by the agency of gets very in detail, no longer repeats here to introduce; This kind connects method through test of many times; Need not establish delay circuit or the shock resistance current circuit also can use, because no matter mains switch is opened, voltage detecting circuit 3, switching signal circuit 4, switch executive circuit 5 all can get into operating state immediately when which magnitude of voltage of pulsation high-voltage DC power supply; Switch executive circuit 5 situation out of control can not occur, this is a kind of very desirable method that connects.
Fig. 3 is that first kind of cooperating with triode of the utility model FET connects the method circuit theory diagrams, and compared to Figure 1, just the FET V2 with Fig. 1 replaces with a triode VT1; VT1 uses as switching tube with triode, and the collector electrode of triode VT1 connects the high-voltage DC power supply positive pole, and emitter connects the positive pole of low-voltage dc power supply 6; Utilize the conducting of FET V1 and the base bias height of closing control triode VT1, thereby the Push And Release of control triode is promptly controlled the magnitude of voltage that the capacitor C 1 in low-voltage dc power supply 6 is charged; In the specific implementation; If the multiplication factor of triode VT1 is not enough, can use two or three combinations, R2 also can use adjustable resistance; Change the size of R2, just can change the voltage swing of low-voltage dc power supply 6.
Fig. 4 is that second kind of cooperating with triode of the utility model FET connects the method circuit theory diagrams; Compare with Fig. 3; Difference is that the collector electrode of triode VT1 connects the negative pole of low-voltage dc power supply, and emitter connects the negative pole of high-voltage DC power supply, other similar with Fig. 3; In the specific implementation, original paper parameter and Fig. 3 slightly have any different.
Fig. 5 is that first kind of cooperating with FET of the utility model operational amplifier connects the method circuit theory diagrams.The difference of Fig. 1 of Fig. 5 and front, Fig. 2 etc. is that voltage detecting circuit 3 is slightly different, and resistance R 1, resistance R 2 have been still the dividing potential drop effect; Send into the negative input end of the operational amplifier of switching signal circuit 4 to dividing potential drop, form the positive input terminal that reference voltage is sent into operational amplifier by resistance R 4, voltage-stabiliser tube W4, capacitor C 2, switching signal circuit 4 is made up of an operational amplifier; Form the operational amplifier working power circuit by resistance R 5, voltage-stabiliser tube W5, capacitor C 3, its operation principle is: when the voltage of negative input end was lower than the reference voltage of positive input terminal, the output of operational amplifier was a high potential; FET V2 opens, and high-voltage DC power supply is through capacitor C 1 charging of FET V2 in low-voltage dc power supply 6, up to the negative input end voltage of operational amplifier during greater than the reference voltage of positive input terminal; Operational amplifier output terminal becomes low-voltage, FET V2 stop conducting, and promptly field effect pipe V2 closes; Stop the C1 charging in low-voltage dc power supply 6; When the voltage of the negative input end of operational amplifier is lower than reference voltage, high voltage direct current again through FET V2 to low-voltage dc power supply 6 chargings, in the specific implementation; It would be desirable and select low consumed power operational amplifier for use; Such as cmos operational amplifier, can simplify the working power design difficulty of operational amplifier like this, reduce the entire circuit power consumption simultaneously; Because in the moment of firm opening power; The working power of operational amplifier also not to be set up; The formation of its switching signal is not also worked, and at this moment switching tube possibly carried out the uncontrolled function of opening, and can in circuit, establish the circuit of delay circuit or other shock resistance electric current.
Fig. 6 is that second kind of cooperating with FET of the utility model operational amplifier connects the method circuit theory diagrams.The difference of Fig. 6 and Fig. 5 is, FET V2 is connected between the negative pole of negative pole and high-voltage DC power supply of low-voltage dc power supply 6, and remainder is identical with Fig. 5, and in the specific implementation, the parameter of original paper and Fig. 5 are slightly variant, such as voltage stabilizing value of voltage-stabiliser tube etc.
Fig. 7 is that first kind of cooperating with triode of the utility model operational amplifier connects the method circuit theory diagrams.The difference of Fig. 7 and Fig. 5 is; FET V2 among Fig. 5 is replaced to triode VT1, and operation principle is basic identical, has added the base stage of a current-limiting resistance R6 (can omit sometimes) access triode VT1 at the output of operational amplifier; When the negative input end voltage of operational amplifier is lower than set point; Triode VT1 opens, and when the negative input end voltage of operational amplifier was higher than set point, triode VT1 closed.
Fig. 8 is that second kind of cooperating with triode of the utility model operational amplifier connects the method circuit theory diagrams.The difference of Fig. 8 and Fig. 7 is that the collector electrode of triode VT1 connects the negative pole of low-voltage dc power supply 6, and emitter connects the negative pole of high-voltage DC power supply, and remainder is identical with Fig. 7.
Fig. 9 is that first kind of cooperating with FET of the utility model triode connects the method circuit theory diagrams.The difference of Fig. 9 and Fig. 1 is, the FET V1 among Fig. 1 is replaced with triode VT2, and the drain electrode of FET V2 connects the positive pole of high-voltage DC power supply; Source electrode connects the positive pole of low-voltage dc power supply; Operation principle is, that the base voltage of triode VT2 is higher than is a certain when worth when R1, R2 dividing potential drop, triode VT2 conducting; FET V2 closes, otherwise then opens.
Figure 10 is that second kind of cooperating with FET of the utility model triode connects the method circuit theory diagrams, is that with the difference of Fig. 9 the drain electrode of FET V2 connects the negative pole of low-voltage dc power supply 6, and source electrode connects the negative pole of high-voltage DC power supply, and promptly operation principle is the same with Fig. 9.
Figure 11 is that first kind of cooperating with triode of the utility model triode connects the method circuit theory diagrams.Be that with the difference of Fig. 9 changed the FET V2 among Fig. 9 into triode VT1, promptly the collector electrode of triode VT1 connects the positive pole of high-voltage DC power supply; Emitter connects the positive pole of low-voltage dc power supply, when high-voltage DC power supply is progressively begun to rise by zero volt, depresses at the branch of resistance R 1, R2; The base voltage of triode progressively rises, and base current rises synchronously, when base current arrives certain value greatly; The collector electrode of VT2 and emitter conducting are closed triode VT1, stop the C1 charging in low-voltage dc power supply 6, when high-voltage DC power supply voltage is reduced to certain value by sinusoidal rule; VT2 closes, and the VT1 conducting is once more to low-voltage dc power supply 6 chargings; Circulate again and again like this, realized high-voltage DC power supply is become the purpose of low-voltage dc power supply.
Figure 12 is that second kind of cooperating with triode of the utility model triode connects the method circuit theory diagrams.With the difference of Figure 11 be triode VT1 to connect method different; The collector electrode of the triode of Figure 12 is connected with the negative pole of low-voltage dc power supply; Emitter is connected with the negative pole of high-voltage DC power supply, and its operation principle is the same with Figure 11's, just some difference of component parameters among the figure.
More than 12 kinds implement the embodiment shown in the figure, pluses and minuses are respectively arranged, cooperate with FET such as FET, power consumption is low, but cost is high slightly, operational amplifier cooperates with FET, voltage control is accurate, but complicated circuit.
In the specific implementation; Also need add insurance or circuit such as current-limiting resistance, impulse-current-proof; Do not draw one by one at this, also have the same purpose that can realize the power frequency Switching Power Supply of alternate manner certainly, such as with P ditch FET or PNP triode etc.; But circuit structure only is these several major parts, does not also enumerate one by one at this.
Through the scheme of the utility model, produced a kind of a kind of brand-new step-down method except that four kinds in transformer, electric capacity, high frequency switch power, resistance becomes High Level AC Voltage the method for low-voltage dc power supply, circuit structure is simple, with low cost; And the cost of low-voltage dc power supply and the relation of power output are little; Be after power output increases, its circuit cost does not increase or slightly increases, and is 10 watts and 40 watts such as the low-voltage direct power output; Its circuit cost is constant or only increase the capacity of filter capacitor and the cost of withstand voltage lifting; This compares with existing high frequency switch power, has very remarkable advantages, will obtain in fields such as LED electricity-saving lamps to be widely used.
Claims (8)
1.1. power frequency Switching Power Supply; Form by AC power (1), rectification circuit (2), voltage detecting circuit (3), switching signal circuit (4), switch executive circuit (5), low-voltage dc power supply (6), load (7); It is characterized in that: the magnitude of voltage that voltage detecting circuit (3) detects the pulsation high-voltage DC power supply that forms through rectification circuit (2) rectification is below or above a certain set point, produces control signal by switching signal circuit (4) and goes the opening or closing of switching tube in the control switch executive circuit (5).
2.2. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: the switching tube in the switch executive circuit (5) is FET V2; The drain electrode of FET V2 connects the positive pole of high-voltage DC power supply; Source electrode connects the positive pole of low-voltage dc power supply (6), and the negative pole of low-voltage dc power supply (6) connects the negative pole of high-voltage DC power supply.
3.3. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: the switching tube in the switch executive circuit (5) is FET V2; The drain electrode of V2 connects the negative pole of low-voltage dc power supply (6); Source electrode connects the negative pole of high-voltage DC power supply, and the positive pole of low-voltage dc power supply connects the positive pole of high-voltage DC power supply.
4.4. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: the switching tube in the switch executive circuit (5) is triode VT1; The collector electrode of VT1 connects the positive pole of high-voltage DC power supply; Emitter connects the positive pole of low-voltage dc power supply (6), and the negative pole of low-voltage dc power supply (6) connects the negative pole of high-voltage DC power supply.
5.5. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: the switching tube in the switch executive circuit (5) is triode VT1; The collector electrode of VT1 connects the negative pole of low-voltage dc power supply (6); Emitter connects the negative pole of high-voltage DC power supply, and the positive pole of low-voltage dc power supply connects the positive pole of high-voltage DC power supply.
6.6. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: switching signal circuit (4) is made up of a triode VT2, and the base stage of the triode VT1 in the collector electrode of triode VT2 and the switch executive circuit (5) or the grid of FET V2 are connected.
7.7. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: switching signal circuit (4) is made up of a FET V1, and the base stage of the triode VT1 in the drain electrode of FET V1 and the switch executive circuit (5) or the grid of FET V2 are connected.
8.8. a kind of power frequency Switching Power Supply as claimed in claim 1; It is characterized in that: switching signal circuit (4) is made up of an operational amplifier; One end of one end of the positive input terminal of operational amplifier and resistance R 4, the end of voltage-stabiliser tube W4, capacitor C 2 links together; One end of negative input end and resistance R 1, an end of resistance R 2 link together, output directly with switch executive circuit (5) in the grid of FET V2 be connected or pass through resistance R 6 with the base stage of triode VT1 be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204608728U CN202334293U (en) | 2011-11-20 | 2011-11-20 | Power frequency switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204608728U CN202334293U (en) | 2011-11-20 | 2011-11-20 | Power frequency switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334293U true CN202334293U (en) | 2012-07-11 |
Family
ID=46446258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204608728U Expired - Fee Related CN202334293U (en) | 2011-11-20 | 2011-11-20 | Power frequency switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334293U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386756A (en) * | 2011-11-20 | 2012-03-21 | 任永斌 | Power frequency switching power supply |
| WO2014067427A1 (en) * | 2012-10-30 | 2014-05-08 | 四川新力光源股份有限公司 | Dimming drive circuit of alternating current directly-driven led module |
| CN110381638A (en) * | 2019-07-25 | 2019-10-25 | 深圳市芯飞凌半导体有限公司 | A kind of controllable silicon dimmer is turned off the light the detection circuit of mode |
| CN110707913A (en) * | 2019-10-18 | 2020-01-17 | 上海军陶电源设备有限公司 | Switching power supply circuit and system |
| CN111107693A (en) * | 2020-01-16 | 2020-05-05 | 浙江阳光美加照明有限公司 | Driving circuit compatible with two different direct current supplies |
-
2011
- 2011-11-20 CN CN2011204608728U patent/CN202334293U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386756A (en) * | 2011-11-20 | 2012-03-21 | 任永斌 | Power frequency switching power supply |
| WO2014067427A1 (en) * | 2012-10-30 | 2014-05-08 | 四川新力光源股份有限公司 | Dimming drive circuit of alternating current directly-driven led module |
| RU2607464C2 (en) * | 2012-10-30 | 2017-01-10 | Сычуань Санфор Лайт Ко., Лтд. | Brightness control circuit of led module with direct supply of alternating current |
| US9860958B2 (en) | 2012-10-30 | 2018-01-02 | Sichuan Sunfor Light Co., Ltd | Dimming drive circuit of alternating current directly-driven LED module |
| CN110381638A (en) * | 2019-07-25 | 2019-10-25 | 深圳市芯飞凌半导体有限公司 | A kind of controllable silicon dimmer is turned off the light the detection circuit of mode |
| CN110707913A (en) * | 2019-10-18 | 2020-01-17 | 上海军陶电源设备有限公司 | Switching power supply circuit and system |
| CN111107693A (en) * | 2020-01-16 | 2020-05-05 | 浙江阳光美加照明有限公司 | Driving circuit compatible with two different direct current supplies |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102386756A (en) | Power frequency switching power supply | |
| CN103269537B (en) | Multi-circuit current-limiting power supplying circuit, controlling method thereof and current-limiting power supplying method thereof | |
| CN103312144A (en) | Active-control valley fill circuit and control method thereof | |
| CN202334293U (en) | Power frequency switching power supply | |
| CN104242620A (en) | system with ripple suppression circuit and ripple suppression method thereof | |
| CN103269164B (en) | The quasi-single-stage high power factor circuit of former limit current constant control and device | |
| CN103269162B (en) | A kind of Quasi-single-stage high power factor constant current circuit and device | |
| CN103716952B (en) | A kind of LED switch power supply and control method thereof | |
| CN203761657U (en) | LED light-emitting apparatus, LED constant-current drive circuit, and constant-current drive controller of LED constant-current drive circuit | |
| CN103025021B (en) | Step-down light emitting diode (LED) drive circuit based on electrical inductance discharge time modulation | |
| CN207664888U (en) | High efficiency full bridge rectifier | |
| CN104411035B (en) | A kind of LED drive circuit powered without assists winding | |
| CN103731049B (en) | Current zero-crossing point detects circuit and method, drive circuit and method, Switching Power Supply | |
| CN203883691U (en) | Current zero-crossing point detection circuit, drive circuit, and switching power supply | |
| CN204217187U (en) | Former limit feedback constant-current supply and current regulating circuit thereof | |
| CN103546026B (en) | A kind of single-phase high-gain no-bridge power factor correction converter | |
| CN202565166U (en) | Fly-back converter control constant current output circuit | |
| CN204145816U (en) | Buck high power factor constant current driving circuit | |
| CN106160416B (en) | BUCK constant-voltage control circuit | |
| CN102412742A (en) | Switching power supply without supply transformer | |
| CN203691696U (en) | Bridgeless LED drive circuit | |
| CN203326879U (en) | Quasi-single-stage high-power-factor constant-current circuit and device | |
| CN203368858U (en) | SSL2108-based buck dimmable LED driving system | |
| CN202633175U (en) | Voltage sagging prevention wide voltage alternating current contactor controller based on low voltage capacitance | |
| CN203912262U (en) | Single-control LED driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20121120 |