CN104218794A - IND stabilized conversion circuit - Google Patents
IND stabilized conversion circuit Download PDFInfo
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- CN104218794A CN104218794A CN201310216378.0A CN201310216378A CN104218794A CN 104218794 A CN104218794 A CN 104218794A CN 201310216378 A CN201310216378 A CN 201310216378A CN 104218794 A CN104218794 A CN 104218794A
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Abstract
The invention belongs to the technical field of electronics and relates to an IND stabilized conversion circuit. A stabilized current conversion process is characterized in that unstable direct current is subjected to stabilization oscillation conversion into stable pulsating current which is subjected to filtering conversion into stable direct current. The IND stabilized conversion circuit comprises a power source, a stabilization oscillation circuit, a filter circuit and a stable load. The stabilization oscillation circuit is composed of a power source, an IND666 circuit and an inductor and is used for converting unstable direct current into pulsating current having stable current waveform, stable amplitude and stable duty ratio. The IND666 circuit is capable of changing supply voltage from the power source to the stable load and providing the stable load with stable current and a resistive load with stable power. An LED drive circuit of the IND stabilized conversion circuit is composed of a current stabilizer, an LED component and a connector and is high in cost performance.
Description
Technical field:
The present invention relates to the steady power transformation of IND road, belong to electronic technology field.
Background technology:
Our typical transformer changes voltage to load transfer energy, but the in the situation that of primary voltage shakiness, voltage, the electric current of transformer secondary output are unstable; Constant-current source can make the current stabilization of load, but electric current is non-adjustable, principle, road complexity; Switch circuit to adjust current is rare; Power stabilize circuit is rare especially.
Summary of the invention:
I redesign a steady power transformation road with a kind of new theory, new circuit, strive making operation principle simpler, make more convenient, cost performance is higher.Create Chinese's oneself practical current stabilization, power stabilize circuit.Switch circuit to adjust current is visited to a practical way theoretically with in practice.To variable frequency adjustment and with inductance, as problems such as adjusting element, power stabilize, also do the exploration of a little.
The present invention is a steady power transformation road making of a IND basic circuit.Use stable load, natural power supply (power supply of supply voltage meeting change at random) can be transformed into the power supply of electric current or power stability output.When supply voltage changes within the specific limits, this steady power transformation road is voltage regulation load or load while being stable ohmic load in load, to load, provides stable electric current; Load is ohmic load, during change in resistance, provides the power supply of stable power to load.The steady power transformation of IND road is exactly a kind of efficient current stabilization or power stabilize translation circuit.Main discussion is current stabilization conversion below.
General circuit is mainly all comprised of power supply and load, and when supply voltage and load are all stablized, the electric current of load is just stable.When load is stablized, supply voltage changes, and will cause the variation of load current.Occurring to increase a circuit between the power supply of change in voltage and stable load, its function is to resist the variation of supply voltage, makes the electric current of load or power keep stable.This circuit is exactly the steady power transformation of IND road.
IND steady power transformation road is the same with the multiplex circuit of other IND, all by power supply, IND basic circuit, load (comprising auxiliary equipment), formed, the core circuit using is a IND basic circuit (IND666) (being called for short the multiplex circuit separate case of 666, IND declares).666 is electronic switches, and inside is provided with sampling control and closes circuit, delayed start-up circuit and switching circuit.Sampling control is closed circuit by the sampling to power supply or some parameters of load, when monitored parameter surpasses the value of a certain setting, produces control and closes signal, and circuit is closed in sampling control turn-offs switching circuit, load power-off.The monitored parameter value of this setting is controlled pass value exactly, and control pass value is exactly the monitored parameter maximum in normally working.Delayed start-up circuit is not control under the prerequisite of closing signal, and the delay through a period of time makes switching circuit conducting.Can shorten the time of delay of 666 the delayed start-up circuit that this steady power transformation road is used along with the rising of supply voltage, along with the reduction of supply voltage, extends; 666 inside circuits that use can also be provided with line under-voltage protective circuit, make switching circuit turn-off when supply voltage is too low, protection circuits (referring to the multiplex circuit of IND).In following narration, 666 conducting, shutoff are exactly conducting and the shutoff of the switching tube in its inner switching circuit.666 externally have 5 terminals, and 1 termination is anodal, 5 termination negative poles (), 2,3 ends are switch terminals, 2 termination high potentials, and 3 termination electronegative potentials, 4 ends are sampling inputs.
In the steady power transformation of IND of the present invention road, used IND current stabilization oscillating circuit, the load of current stabilization oscillating circuit is inductive load, after power on circuitry, time delay through delayed start-up circuit makes 666 conductings, and the electric current in load can not suddenly change, and the electric current in load is elevated to control pass value from zero needs a period of time, during this period of time, be the time of 666 conductings.To the current sampling of load, monitoring, and set the maximum (control pass value) that load current allows, when load current reaches control pass value, 666 turn-off.Have no progeny in 666 passes, signal is closed in control, and delayed start-up circuit makes switching circuit conducting again through delay after a while, and 666 is the time that switching circuit turn-offs from turn-offing (time of delay of delayed start-up circuit) during this period of time of conducting again.666 periodic conductings have just formed concussion with shutoff.
Accompanying drawing explanation:
Accompanying drawing 1, IND current stabilization shift theory block diagram
The electrical schematic diagram on the steady power transformation of the IND road of accompanying drawing 2, steady load
The electrical schematic diagram of accompanying drawing 3, LED drive circuit
Accompanying drawing 1 is the shift theory block diagram of IND current stabilization conversion, and as we can see from the figure, current stabilization oscillating circuit becomes stable pulsating current the unsettled DC converting of power supply, and this pulsating current becomes galvanic current stream supply load through filtering.
If its current average of pulsating current is stable, or is the pulsating current of stable DC electric current after filtering, it is exactly stable pulsating current so.Stable pulsating current is exactly galvanic current stream after filtering.
First unstable direct current is transformed into stable pulsating current, then this conversion that stable pulsating current is obtained to galvanic current stream through filtering is called the conversion of IND current stabilization.
In practical circuit, the factor that affects load current is mainly two aspects, is the variation of supply voltage on the one hand, is the variation of load on the one hand.Load be below mainly discussed be the situation of stable load (ohmic load that comprises voltage regulation load and stable resistance).
Embodiment:
Give a stable load supplying, the electric current of steady load, what mainly consider is the impact of the variation of supply voltage on load current.The steady power transformation of the IND road the present invention relates to is mainly a current stabilization circuit designing in the situation that load is stable.The steady power transformation route of IND IND current stabilization oscillating circuit, filter circuit, load form.Its basic principle is, through the conversion of IND current stabilization, unstable direct current conversion galvanic current stream.
The instantaneous maximum of pulsating current is the amplitude of vibration of pulsating current, and the width of pulse and the intermittent time of pulse have formed the concussion cycle of pulsating current.The pulse duration of pulsating current accounts for the ratio in concussion cycle, is the duty ratio of pulse.The size of pulsating current is relevant with the wave mode of the amplitude of vibration of pulsating current, duty ratio, pulsating current.
The constant pulsating current of a wave mode (comprising square wave, the different triangular wave of slope), if its amplitude of vibration is constant, duty ratio is constant, so, this pulsating current is exactly stable pulsating current.This pulsating current is exactly galvanic current stream after filtering.
The IND current stabilization oscillating circuit of steady load, the waveform of concussion electric current can be similar to regards triangular waveform (during mains voltage variations the slope of Current rise not identical but wave mode is constant) as, under the stable condition of load, unstable DC converting becomes in the process of steady pulsation electric current, mainly the impact of the variation of supply voltage on pulsating current, two subject matters of duty ratio of steady pulsation electric current amplitude of vibration and steady pulsation electric current in the time of will solving mains voltage variations.
Accompanying drawing 2 is the electrical schematic diagrams on the steady power transformation of the IND of steady load road.R
1be sample resistance, it is that network component, R are closed in 666 sampling control
1value determined that sampling control closes the instantaneous maximum (control pass value) of the load current that circuit sets, shake the amplitude of vibration of electric current.L
1, FZ, C
1, D
1it is 666 load.Wherein, FZ is stable load, L
1, C
1, D
1the auxiliary equipment of load FZ, D
1be fly-wheel diode, its effect is, at 666 conduction periods, L
1owing to there being electric current to pass through, stored energy, at 666 blocking intervals, L
1the energy of storage passes through D
1supply load, can be energy-conservation, if there is no D
1, at the moment of 666 shutoffs, L
1the high pressure producing can damage the element in circuit, C
1by the filter capacitor of the pulsating current of FZ.Sustained diode
1can be included in 666 inside, here for operation principle is described, so, draw separately.
Operation principle is, after switching on power, 666 delays through delayed start-up circuit, make 666 conductings, and power supply is through C
1, FZ
1, 666, R
1give L
1two ends add voltage, pass through L
1electric current can not suddenly change, this electric current increases gradually from zero, while increasing to control pass value, 666 shutoffs.Current increases 666 be the time of conducting during this period of time, be pulse duration during this period of time, waveform is (being similar to) triangular wave wave mode.666 close and to have no progeny, and delayed start-up circuit is delayed again makes 666 conductings.The time of this section of delay is the time of 666 shutoffs, is the intermittent time of pulse.666 so periodic conducting and shutoffs, at L
1upper formation pulsating current.
As previously mentioned, pass through L
1the maximum of electric current be exactly that the control pass value that circuit is set is closed in sampling control, this oscillating circuit is a sustained oscillation circuit that current oscillation amplitude is equal, the variation of supply voltage does not affect the amplitude of vibration of concussion electric current.If supply voltage changes, it will have influence on pulse duration and intermittent time two aspects of pulsating current, if supply voltage raises on the one hand, after 666 conductings, is added in L
1the voltage at two ends raises, and passes through L
1electric current by zero time shorten that increases to control pass value, pulse duration reduces, and can make the duty ratio of pulse reduce; On the other hand, 666 delayed start-up circuit is when supply voltage raises, and shorten time of delay, and the intermittent time of pulse shortens, and the duty ratio of pulsating current increases; Supply voltage raises, and pulse duration reduces, and the intermittent time reduces.If supply voltage reduces, will make pulse duration increase, the intermittent time increases.To affect these two factors of pulsating current change in duty cycle are mutually restrictions to said mains voltage variations above, if to these two mutually the factors of restriction rationally arrange, supply voltage makes the duty ratio of pulsating current keep stable while changing within the specific limits.
Comprehensive above analysis, the IND current stabilization oscillating circuit of steady load is the oscillating circuit of electric current constant amplitude, is also the pulsation oscillating circuit that duty ratio is stable.The waveform of pulsating current is a kind of by the zero waveform that increases to gradually peaked approximate triangular wave, although mains voltage variations, concussion electric current is wave mode identical (being all triangular wave).So IND current stabilization concussion output is steady pulsation electric current.Through C
1filtering, the electric current of the load that makes to flow through is stable DC.
In a concussion cycle, the rising of supply voltage, can cause that IND current stabilization oscillating circuit ON time and turn-off time in a concussion cycle all reduce, and the concussion cycle is reduced, and concussion frequency increases; In like manner, the reduction of supply voltage, makes to shake frequency and reduces.When mains voltage variations, will there is corresponding variation in concussion frequency, so this is a frequency-conversion steady-flow circuit.A this circuit that I make, coarse because of the coil of making, when line voltage is higher, can't hear the noise of coil, when line voltage declines, hear gradually the noise that coil produces, the frequency of sound reduces gradually.Also can illustrate from another point of view, during this circuit working, concussion frequency changes along with the variation of supply voltage.
666 are operated on off state, and the steady power transformation of IND road is a switch circuit to adjust current, are also a frequency-conversion steady-flow circuit.Briefly, be exactly that current stabilization oscillating circuit has been stablized the amplitude of output current when mains voltage variations; Although variation has occurred supply voltage, the design of circuit makes this variation of supply voltage only change the duty ratio that concussion frequency does not affect pulsating current, does not also change the wave mode of concussion electric current.So can make the pulsating current of output become stable pulsating current.Through filtering, output current is galvanic current stream.
If load ohmic load.To whole steady power transformation Lu Eryan, it is the IND oscillating circuit that a load is inductive load, if load is constant, and when supply voltage changes within the specific limits, the outputting current steadily of circuit, its stable output power.
For this steady power transformation road, make the following instructions:
One, current stabilization oscillating circuit, in the situation that supply voltage is too low, due to underfrequency, affects filter effect, sometimes needs to use inner 666 circuit that comprise under-voltage protecting circuit, to shield when brownout.
If two loads are the voltage regulation loads resemble LED, the voltage stabilizing value of this voltage regulation load changes within the specific limits, and the electric current by load also can keep stable.
Three, experiment is found when load is ohmic load, when the resistance of resistance changes within the specific limits, the voltage at resistance two ends will change, electric current in load and voltage are all changing, and the stable balance point of this electric current and change in voltage is exactly that the power consuming before power and the resistance variations of resistance consumption equates.That is to say, when the resistance of resistance, fix, after the electric current setting by resistance, supply voltage changes within the specific limits, the power stability of resistance consumption; The resistance of supply voltage and resistance all changes within the specific limits, and the power of resistance consumption is also stable.This also illustrates, the steady power transformation of IND road, when resistance is done load, can be used as stable-power output circuit.
Four, load is stable load, and this current stabilization circuit is because of constant by the electric current of load, so the voltage in load is also constant; If load is the voltage regulation load as LED, the voltage in load is also stable.Say in a sense, for dead load, this current stabilization circuit is series stabilized current circuit, is also serial regulating circuit.Because supply voltage is unstable, the amplitude of the concussion voltage of current stabilization oscillating circuit output is also unstable.In current stabilization oscillating circuit, during 666 conducting, the voltage at sample resistance two ends, the voltage drop of 666 switching circuits, L
1on voltage, C
1the voltage sum at two ends (in load) equals supply voltage.Because the voltage drop of sample resistance, 666 switching circuits is very little, C
1the voltage stabilization at two ends, so, L
1the voltage at two ends is approximately equal to voltage poor at supply voltage and load two ends, load and C
1parallel connection, the voltage stabilization in load, the variation of supply voltage is just mainly reflected to L
1go up, namely L
1the voltage variety at two ends is approximately equal to the variable quantity of supply voltage.With regard to current stabilization circuit, pass through L
1the amplitude of vibration of pulsating voltage is approximately equal to the poor of supply voltage and load voltage, and the variable quantity of supply voltage is just by L
1bear L
1as voltage, adjust element and use, L
1the concussion voltage at two ends will change with the variation of supply voltage.Guarantee to pass through L
1current stabilization, pass through L
1the frequency of concussion electric current must change, only have variation of this concussion frequency just can make to pass through L
1concussion electric current keep stable.Here it is current stabilization oscillating circuit regulates L by the variation of frequency
1on voltage drop, realize the reason of circuit current stabilization, voltage stabilizing.In simulation serial regulating circuit in the past, power tube adjusts pipe, due to the variation that adjustment pipe has carried supply voltage, just makes the voltage stabilization of output, adjusts the variable quantity that pipe has carried supply voltage, adjusts pipe and wants the many power of loss.In conventional switch voltage-stabilizing circuit, with transformer, carried the variable quantity of supply voltage.In the present invention, circuit working is on off state, concussion state, with inductance, do series connection and adjust element, by it, carried the variable quantity of supply voltage, when the alternating voltage at its two ends changes, with the variation of the frequency of alternating current, stablize by the size of its electric current, and have fly-wheel diode, the magnetic energy of storing while making inductance conducting transforms in time.In this process, L
1upper energy is mainly to change between electric energy and magnetic energy, and the loss of energy is mainly the D.C. resistance of inductance, so energy loss is little in this process.
Five, the loss of this circuit mainly comprises sample circuit, 666 circuit (being mainly switching tube) and L
1and D
1deng.These losses are little, so this circuit loss is very little, should have higher conversion efficiency.
Six, the steady power transformation of IND road is the translation circuit that a kind of direct current high voltage is transformed into direct current low voltage, has the effect that resembles step-down transformer, efficiently transferring energy; Or draw energy from natural power supply, step-down passes to the ohmic load of voltage regulation load or fixed resistance value, makes load obtain stable electric current; Or draw energy from natural power supply, step-down passes to the ohmic load of variation, makes load obtain stable power.So long as load is fixing steady load, the load that is transferred to of constant power energy efficient will be drawn in the steady power transformation of IND road from power supply, obtain stable power in load.
Seven, it is current stabilization circuit, size that can regulation output electric current; It is power stabilize circuit, and size that can regulation output power (is passed through R
1regulate).
Eight,, for this stable pulsating current, the variation of this pulsating current frequency, has reflected the variation of supply voltage.
Nine, its operation principle is simple, novel.Circuit is simple, and cost performance is high.
Ten, the design concept of this circuit is, its nature of source, lets nature take its course, with its nature.The generation of IND basic circuit 666 is exactly discovery, perfect from make; When resistance is done load, experiment finds that steady power transformation road changes within the specific limits at supply voltage, resistance value is when change within the specific limits, the power that circuit outputs to load is stable, and we determine that the steady power transformation of IND road has the function of stable-power output to ohmic load.It is unlike switch voltage-stabilizing circuit, constant-current circuit, deliberately according to the feedback information of output, the input of control circuit (PWM, etc.); The steady power transformation of IND road is provided with restriction to the current amplitude of output; The supply voltage changing changes the earthquake frequency of current stabilization oscillating circuit, and we cry its frequency conversion and are not its frequency modulation; Circuit will be offset the impact that the variation of supply voltage brings to load current, the variation of supply voltage can affect the pulse duration of pulsating current and the length of intermittent time, leverages competitor's strength to hit back, and we let nature take its course, utilize the duty ratio of its steady pulsation electric current, make the pulsating current of its stable output.When inductance coil passes through alternating current, the voltage at its two ends is relevant with the frequency of alternating current with the electric current by it, and we adjust element with it, and the variation of the concussion frequency causing while utilizing mains voltage variations, changes the voltage drop at its two ends, the voltage of steady load; Stable by its electric current; Utilize the character of its energy storage, with fly-wheel diode, improve the efficiency of circuit.
Embodiment
Accompanying drawing 3 is electrical schematic diagrams of LED circuit for lamp.LED is stable load, and its groundwork principle is as described in embodiment.Civil power is through full-bridge DL
1rectification is again through power filter C
2filtering obtains unstable DC power supply.R
2be sample resistance, regulate R
2can set the size of control pass value, change the size of concussion electric current, change by the size of LED electric current C
3be the filter capacitor of pulsating current, to stable pulsating current filtering, making the electric current by LED is galvanic current.It can be divided into two parts, and these two parts connect by connector J0.First is flow straightener, and it comprises DC power supply and current stabilization oscillating circuit, and DC power supply is by DL
1and C
2form, oscillating circuit is by 666 and R
2, L
2form.R
2it is the sample resistance that circuit is closed in 666 sampling control.Second portion is LED assembly, and it comprises steering circuit full-bridge DL
2, pulsating current filter circuit C
3with load LED, DL
2effect be guiding function, make first and second portion with being connected the access polarity that does not need to consider second portion while using connector connection, no matter how two lines of connector connect, and can guarantee C
3, LED is by correct polarity place in circuit, the wiring of connector is polarity no longer, has avoided causing LED not work or damaging because of connector wrong polarity.
Also it should be noted that C
3the combination capacitor of available a plurality of Capacitance parallel connections.If C
3single electric capacity, its lost efficacy or open circuit after electric current by LED be pulsating current, affect the result of use of circuit, select the combination of many electric capacity can reduce the probability of fault.When if supply voltage is too low, the concussion underfrequency of oscillating circuit, the filter effect of pulsating current is not good, affects the work of circuit.So can play a protective role when supply voltage is too low at the 666 inner under-voltage protecting circuits that arrange.
I make power supply with civil power, and LED drive circuit is tested, and that with LED, does load carries out current stabilization experiment, also with the power stabilize that this circuit did to make of resistance load, test, and experimental circuit does not arrange under-voltage protection as accompanying drawing 3.666 inside.When load is LED, line voltage is in normal range (NR) (250
v-190
v) while changing, the curent change by LED is less than 2%; When voltage is lower (190
v-160
v) curent change by LED while changing is less than 10%; When voltage is low, along with the reduction of line voltage, the electric current by LED reduces gradually, finally goes to zero; With resistance, substitute LED, the resistance value of supply voltage, load changes within the specific limits, the power stability obtaining on resistance.Be my experimental facilities rather primitive, inconvenience too much discloses these experimental datas.The operation principle on the steady power transformation of IND road can only illustrate qualitatively, and can not do quantitative analytical calculation.But the steady power transformation of IND road can change power supply to the supply power voltage of load, to voltage regulation load, transmit stable electric current efficiently, to ohmic load, transmit stable power efficiently.
LED drive circuit if LED quantity is fixed, after the current settings by LED, can, when line voltage changes within the specific limits, draw equal Energy Transfer to LED from civil power; When if the quantity of LED increases and decreases within the specific limits, the electric current by LED can keep stable.If suitable fixed resistance replacement for the LED in circuit, when line voltage changes within the specific limits, equal Energy Transfer is drawn to fixed resistance from civil power in the steady power transformation of IND road.
LED drive circuit is illustrated:
1, circuit is simple.This circuit is without IC, and the quantity of element is seldom, and whole LED drive circuit (except LED) can be only with ten branched conventional discrete components.
2, with inductance, adjust element, efficiency is high, energy-conservation.
3, current stabilization wide ranges, working range is wider, can significantly in excursion, work at supply voltage.
4, due to LED and Capacitance parallel connection, the voltage at electric capacity two ends can not suddenly change, and when just start, the voltage at electric capacity two ends raises gradually, so the startup of LED is soft start, and can eliminate the impact of surge current.
5, modular structure, is mainly divided into flow straightener, LED assembly, is easy for installation and maintenance.
6, this circuit needs quantitative calculating and theoretic perfect, also needs further optimization.
Claims (10)
1.IND current stabilization shift theory, is characterized in that, its steady flow process is first transformed into DC power supply stable pulsating current, then by this stable pulsating current after filtering, becomes galvanic current stream.
2. as claimed in claim 1, the steady power transformation of steady load IND road, is characterized in that, it is comprised of power supply, IND current stabilization oscillating circuit, filter circuit, steady load.
3. as claim 1, described in claim 2, IND current stabilization oscillating circuit, is characterized in that, it is by power supply, 666,, the composition such as inductance.
4. as claimed in claim 1, LED drive circuit, is characterized in that, it is comprised of IND flow straightener, connector, LED assembly.IND flow straightener, LED assembly connect by connector.
5. as claim 1, described in claim 4, IND flow straightener, is characterized in that, it is comprised of power supply and 666, inductance, diode etc.
6. as claim 1, described in claim 4, LED assembly, is characterized in that it is by steering circuit, filter circuit, and LED forms.
7. as claim 1, described in claim 6, filter circuit, is characterized in that filter capacitor is comprised of the combination capacitor of a plurality of Capacitance parallel connections; Connector, is characterized in that two lines connect, not polarity.
8. as claimed in claim 2, the steady power transformation of IND road, is characterized in that, it is series stabilized current circuit, is switch circuit to adjust current, frequency-conversion steady-flow circuit.
9. as claimed in claim 2, the steady power transformation of IND road functional character is that, when load is voltage regulation load, the steady power transformation of IND road is current stabilization circuit; When load is ohmic load, the steady power transformation of IND road is power stabilize circuit.
10. principle is adjusted in frequency conversion, it is characterized in that, inductance adjusts element, changes by the frequency of the electric current of inductance, changes the voltage drop on inductance, the variation of carrying supply voltage and stable by its electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310216378.0A CN104218794A (en) | 2013-06-04 | 2013-06-04 | IND stabilized conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310216378.0A CN104218794A (en) | 2013-06-04 | 2013-06-04 | IND stabilized conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104218794A true CN104218794A (en) | 2014-12-17 |
Family
ID=52100012
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310216378.0A Pending CN104218794A (en) | 2013-06-04 | 2013-06-04 | IND stabilized conversion circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5610807A (en) * | 1994-10-14 | 1997-03-11 | Matsushita Electric Works, Ltd. | Power converting system with a plurality of charging capacitors |
| CN2552285Y (en) * | 2002-06-19 | 2003-05-21 | 侯润亚 | Constant light strobeless lamp circuit |
| CN201821554U (en) * | 2010-09-21 | 2011-05-04 | 李志成 | LED energy-saving lamp driving circuit |
| CN102651618A (en) * | 2011-02-25 | 2012-08-29 | 凤凰电机公司 | Power supply circuit |
-
2013
- 2013-06-04 CN CN201310216378.0A patent/CN104218794A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5610807A (en) * | 1994-10-14 | 1997-03-11 | Matsushita Electric Works, Ltd. | Power converting system with a plurality of charging capacitors |
| CN2552285Y (en) * | 2002-06-19 | 2003-05-21 | 侯润亚 | Constant light strobeless lamp circuit |
| CN201821554U (en) * | 2010-09-21 | 2011-05-04 | 李志成 | LED energy-saving lamp driving circuit |
| CN102651618A (en) * | 2011-02-25 | 2012-08-29 | 凤凰电机公司 | Power supply circuit |
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Application publication date: 20141217 |