CN1275376C - Auxiliary circuit for power factor read just apparatus - Google Patents
Auxiliary circuit for power factor read just apparatus Download PDFInfo
- Publication number
- CN1275376C CN1275376C CN 02128686 CN02128686A CN1275376C CN 1275376 C CN1275376 C CN 1275376C CN 02128686 CN02128686 CN 02128686 CN 02128686 A CN02128686 A CN 02128686A CN 1275376 C CN1275376 C CN 1275376C
- Authority
- CN
- China
- Prior art keywords
- power supply
- power factor
- power
- factor corrector
- circuit
- 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
Images
Landscapes
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The present invention relates to an auxiliary circuit for a power factor corrector. The auxiliary circuit is arranged in a switching type power source supply device so that a positive end and a negative end of a filtering capacitor which is connected with the side of a secondary winding of an inductor arranged on the switching type power source supply device are respectively connected with detecting pins of zero current of a power factor corrector in series through resistors, and the power supply pins of the power factor corrector share the secondary side winding via a power supply circuit. In this way, the detecting pins and the power supply pins of the zero current of the power factor corrector can carry out current detecting and power supply operation by utilizing a single secondary side winding under the condition no limitation of the turn number ratio of the winding. The present invention not only can effectively reduce the complexity and the fabricating cost of the circuit, but also can reduce the volume of the switching type power source supply device.
Description
Technical field
The invention relates to a kind of control circuit of switch type power supplying device, especially refer to a kind of the order in this switch type power supplying device, the zero current detecting pin of a power factor corrector of being installed and power supply pin, can be in the number of turns that is not subjected to winding than under limiting, the auxiliary circuit of a level winding on shared its interior inductor.
Background technology
Most of circuit designers are when carrying out the design of electronic circuit, almost never consider power factor (Power Factor, abbreviation P.F.) influence, but design for power supply unit (power supply), because its input current generally is non-sinusoidal waveform, therefore if desire from these power supply units AC power (AC) input, obtain the voltage of DC power supply (DC), common method is to utilize a bridge rectifier, an input filter capacitor in parallel, this input current is carried out filtering and rectification, and this input current just can charge only when its voltage surpasses the voltage at these input filter capacitor two ends to this input filter capacitor.In this kind conventional power source supply, because in order to reduce ripple, the capacitance of this input filter capacitor must be designed to very big usually, this measure causes the magnitude of voltage of this input ac power, in most of the time, all be lower than the magnitude of voltage of this electric capacity, therefore, this bridge rectifier has only the extremely short time in each half cycle, be conducting state, make the peak value of the current waveform that it is obtained, will be than high times of its equivalent rms value, this high immediate current, when flowing through the winding of these power supply units, its equivalent inductance will cause the distortion (distortion) of supply voltage, improve the load of power supply, this is common so-called power pollution, and the size of this power pollution is to represent with its harmonic components or power factor in theory.
In fact, power factor is made of current distortion and two parameters of phase shift, and wherein phase shift section can compensate at the supply of electric power end, but current distortion just must be improved at the electricity usage end.With the supply socket that can supply 115V, 15A alternating current is example, but the load of the normal operation under the 15A power supply situation of pegging graft on it, at this moment, if set power supply unit (its power factor generally approximates 0.6) in this load does not have the power factor correction principle of (Power factor Correction is called for short P.F.C), then on it effective input current, through behind this power supply unit, will be reduced to only surplus 9A from 15A.According to the above as can be known, this supply socket of both having begun 4 computers that are provided with circuit of power factor correction of can pegging graft simultaneously with power supply, make its normal operation, but can't guarantee two computer normal operations that do not contain circuit of power factor correction.
This because of current distortion, the power pollution that is caused, not only will lower the efficient at power supply networking, make the electric power control of Utilities Electric Co. comparatively difficult, and will force Utilities Electric Co. must use thicker cable to come transferring electric power, so, in recent years, work up various standard (as: EN61000-3-2) successively at European Region, with the harmonic current size that is produced on the restriction power-supply device, and regulation light fixture and high-power electric appliance equipment, must install circuit of power factor correction additional, just allow the input European Region, these standards are for being for China manufacturer of export orientation with household electrical appliance and computing information product, with the impact that causes to a certain degree, therefore how skill with circuit of power factor correction, be installed in various household electrical appliance, computer, on the product of defeated Europe such as monitor and power supply unit, improve the harmful effect that harmonic current is caused, become the important topic that each manufacturer must face with effective.
In recent years, the manufacturer of various power supply unit, for the switch type power supplying device that it is produced, can meet of the requirement of EN61000-3-2 standard to the current harmonics size, all install so-called power factor corrector (POWER FACTOR CORRECTOR thereon additional, be called for short PFC), these correctors mainly can be divided into passive type and active two kinds, wherein active power factor corrector, (Booster) is the most commonly used with booster type, the power factor corrector of this booster type can be divided into continuous conducting (the CONTINUOUS CONDUCTION MODE that decides frequency again, be called for short CCM) and the boundary scheme (BOUNDARY MODE) of frequency conversion, the fixed controller of pattern frequently is to brag about the peak current of the switch of flowing through less, i.e. conducting loss is less, but its switch cost is bigger, EMI is also relatively poor, the integrated circuit that is numbered UC3854 (IC) that wherein UNITRODE company produced is typical case's representative, and its pin position more (16Pin) is so also more complicated of application mode.The controller of variable mode is to brag about zero current to switch, be that switch cost is less, but its conducting loss is bigger, the required peak current that bears of switch is also bigger, wherein with SGS Thomson company produced be numbered L6561 integrated circuit and the integrated circuit that is numbered MC33262 produced of MOTOROLA company serve as typical case's representative, its pin position less (8 Pin), application mode is comparatively simple, yet, in the selection of switch, pay special attention to the RDSon parameter, because of this parameter value is more little, loss is also just low more.
Generally speaking, the operation principles of switch type power supplying device, mainly be that mat is adjusted the responsibility cycle that switch switches, adjust storing of energy, with the supply out-put supply, so so-called active merit mainly is that mat is when adjusting the responsibility cycle of switch switching because of revising, not only make its intake meet the output demand, and make the sine wave (Sin) of the shape approximation of input current in power supply.Because the operation framework of power factor corrector, be under the condition of zero current, to start electronic switch, therefore, must have zero current circuit for detecting (Zero Current Detector on it, be called for short ZCD), the power supply unit 10 that is provided with power factor corrector 20 that is shown in Figure 1, its operation waveform as shown in Figure 2, its operation principle is when the discharging current of the inductor 30 in a booster type (Booster) transducer on it reduces to zero, energy storage inductor and stray capacitance will produce resonance, and the voltage Vns of the secondary winding 31 of this inductor 30 can produce the negative edge waveform by high step-down.So that the power factor corrector 20 that SGS Thomson company is numbered the integrated circuit of L6561 to be installed is example, and consult shown in Figure 1, when zero current detecting pin ZCD on it detects voltage VZCD when being reduced to critical voltage Vth, the comparator of this L6561 integrated circuit internal power factor correction device will be triggered, produce a controlling signal, make switch mosfet 40 beginning conductings, this is the principle that zero current starts, and before next conducting, the voltage VZCD that this pin ZCD is detected must exceed critical voltage Vth, carry out replacement (Reset) action, therefore, the number of turns of the winding that is connected with this current sense pin ZCD on this energy storage inductor (being referred to as zero current detecting winding in the present invention) must meet following requirement than (n):
At this moment, if the specification of this power supply unit, be that input voltage vin is in the 90-264V scope, and when output voltage V o is 400V, the number of turns ratio of this zero current detecting winding, must be less than 12.7: 1, if the number of turns ratio of this primary side winding 31 be design at 20: 1, will cause input voltage vin 264V the time, it is discontinuous that control circuit work takes place, and the generation anomaly, its reason is when input voltage vin is the f peak value, and the voltage VZCD on this pin ZCD fails to exceed critical voltage Vth, causes carrying out the action of resetting, and above-mentioned anomaly takes place, its waveform is as shown in Figure 3.So, traditionally, this primary side winding 31 must be at the usefulness as current sense or power supply, reach-power supply winding 312 and be separated to be designed to zero current detecting winding 311, consult shown in Fig. 4 (a), this measure has not only increased the complexity and the manufacturing cost of circuit, and has further increased the volume of power supply unit.In addition, other has the designer is zero current detecting pin ZCD and the shared single primary side winding 31 of power supply pin Vcc energy that makes this power factor corrector 20, so demand according to this zero current detecting pin ZCD, the number of turns ratio of design primary side winding 31, make it can be connected directly to this zero current detecting pin ZCD, yet this moment, because this primary side winding 31 is through the voltage of rectifying and wave-filtering, the required voltage of power supply pin Vcc that can exceed this power factor corrector 20, so need set up an extra linear voltage-stabilizing circuit 32, consult shown in Fig. 4 (b), it is carried out step-down, therefore obtain lower supply power voltage, this practice and fail effectively to simplify the complexity and the manufacturing cost of circuit.
Summary of the invention
Because in the aforementioned conventional switch formula power supply unit that is provided with power factor corrector, zero current detecting winding and power supply winding, can't be merged shared shortcoming of deriving, the inventor is at this, work out a kind of auxiliary circuit with power factor corrector of self-power supply and zero current detecting principle, this auxiliary circuit is provided in a side of in the switch type power supplying device, the positive and negative terminal of a filter capacitor that is connected with the secondary winding side that makes inductor on it, can distinguish mat one resistance, be connected serially to the zero current detecting pin of a power factor corrector, and make the power supply pin of this power factor corrector pass through-shared this primary side winding of power supply circuits.
One object of the present invention, be zero current detecting pin and power supply pin at this power factor corrector, can shared this primary side winding, and need not additionally to set up-zero current detecting winding, so can be under the prerequisite of not sacrificing power, effectively reduce the complexity and the manufacturing cost of circuit, and further dwindle the volume of power supply unit.
Another object of the present invention is at the zero current of this power factor corrector detecting pin and power supply pin, can the number of turns that is not subjected to winding than restriction under, shared this primary side winding significantly promotes the stability of this control circuit.
The present invention is a kind of auxiliary circuit with power factor corrector of self-power supply and zero stream detecting principle, wherein, comprises:
A transducer comprises an elementary winding, secondary winding and other circuit and part in this transducer;
Power supply circuits comprise a filter capacitor in these power supply circuits, this filter capacitor is connected to a side of secondary winding;
A zero current circuit for detecting comprises two resistance at least in this zero current circuit for detecting, an end of each resistance is connected to the anode and the negative terminal of filter capacitor respectively, and the other end is connected to zero current detecting pin;
A power factor corrector, zero current detecting pin on this power factor corrector is connected with the zero current circuit for detecting, power supply pin on it is connected with power supply circuits, and all the other pins are by its purposes, respectively with transducer in other circuit be connected with part;
A diverter switch, this diverter switch are connected with pin and elementary winding on the power factor corrector respectively, according to the trigger signals that this pin transmits, switch.
Power factor corrector can be the power factor corrector of boundary scheme.
The negative terminal of filter capacitor is connected to secondary winding, and its anode is to be connected to the power supply pin by power supply circuits.
Wherein being connected to the resistance value of filter capacitor negative terminal, is less than the resistance value that is connected to this filter capacitor anode.
Description of drawings
Shown in Figure 1 is the control circuit schematic diagram that tradition is provided with the switch type power supplying device of power factor corrector;
Shown in Figure 2 is on the control circuit of Fig. 1, the voltage V that is detected on the zero current detecting pin ZCD
ZCD, input voltage vin and output voltage V o the waveform relationship schematic diagram;
Shown in Figure 3 is on the control circuit of Fig. 1, when input voltage vin is peak value V
IpkThe time, the voltage V on the zero current detecting pin ZCD
ZCDThe waveform schematic diagram;
Be control circuit shown in Fig. 4 (a), this primary side winding separately be designed to the control circuit schematic diagram of a zero current detecting winding and a power supply winding at Fig. 1;
Shown in Fig. 4 (b) control circuit at Fig. 1, the control circuit schematic diagram of designed single primary side winding;
The circuit box schematic diagram of the power factor corrector that is numbered L6561 that the SGS-Thomson of being shown in Figure 5 company is produced;
Shown in Figure 6 is the waveform schematic diagram of inductive current under the frequency conversion boundary scheme of the present invention;
The present invention of being shown in Figure 7 sets up the circuit diagram after the resistance R 2 in control circuit;
Shown in Figure 8 be the control circuit of the 7th figure when higher input voltage, the voltage waveform view on the zero current detecting pin ZCD;
The present invention of being shown in Figure 9 sets up the circuit diagram after a resistance R 1 and the resistance R 2 respectively in control circuit;
Shown in Figure 10 is on the control circuit of Fig. 9, the voltage waveform view on the zero current detecting pin ZCD;
Shown in Figure 11 is on the control circuit of Fig. 9, the voltage waveform view on the power supply pin Vcc.
The figure number explanation
Multiplier 22 comparators 23
Primary side winding 71 filter capacitor C
1
Power supply pin Vcc switch mosfet 80
Embodiment
The power factor corrector of in conventional switch formula power supply unit, being installed, its control circuit is according to the difference of its brand and application, has plurality of specifications, in the present invention, for ease of the actual effect that design concept of the present invention is described, implements skill and produced, the special integrated circuit of being produced with SGS-Thmson company that is numbered L6561 is as the power factor corrector that is adopted in the preferable embodiment, when the present invention implements in reality, be not limited thereto.
The integrated circuit that is numbered L6561 that SGS-Thomson company is produced; be to be adapted to low power demand and a kind of power factor corrector of manufacturing and designing; this corrector only has 8 branch connecting pins (Pin); generally be useful under 100 to 500 watts the operational environment; its design and application are to be celebrated with simple and convenient; and itself must operate in critical (critical) current-mode; this corrector inside is provided with the design of output over-voltage protection, low starting current and operating current; and inner startup oscillator can produce gate trigger signal when this corrector is activated.
In the present invention, consult shown in Figure 5, when this corrector 20 is applied to a switch type power supplying device, the 1st pin on this corrector 20, be in order to receive voltage INV by a booster type (Boost) transducer dividing potential drop, and it is directed into error amplifier a 21 (Error Amplifier of its inside, be called for short E/A), this error amplifier 21 subtracts each other with-inner direct current reference signal, and after it is carried out filtering, produce an error signal, the frequency range of this error signal, in design far below the power rectifier signal, in power supply one-period change, can be considered direct current, then, multiplier 22 (Multiplier) in this corrector 20, again with this error signal, carry out multiplying with the 3rd pin on it from the power rectifier signal MULT that bridge rectifier imported, its result can be used as the reference signal of inductive current peak, comparator 23 in this corrector 20 compares this reference signal again with the inductive current CS that the 4th pin is detected on it, reached this reference signal as if the peak value of this inductive current CS, then this comparator 23 will be exported a pulse (pulse) to a RS switch (Latch) 24, make this RS switch 24 close.
After this RS switch 24 cut out, inductive current promptly was linear and descends, and the zero current detecting pin ZCD on this corrector 20 detects a zero current signal, promptly detect inductive current when dropping to zero, power factor corrector 25 in this corrector 20 will be exported a pulse to this RS switch 24, make its conducting again, at this moment, if the hypothesis switching frequency is much larger than supply frequency, power supply can be considered definite value in one-period, and then inductive current will be linear rising, so, promptly finish the switching of one-period.By its control result as can be known, this corrector 20 clearly control circuit of this boosting type converter of military order operates in the frequency conversion boundary scheme, promptly at continuous conduction mode (CONTINUOUS CONDUCTION MODE, be called for short CCM) and do not connect conduction mode (DISCONTINUOUS CONDUCTION MODE, abbreviation DCM) border, consult shown in Figure 6, because, in the control circuit of the boosting type converter of frequency conversion boundary scheme, the average current in each cycle is 1/2 of this cycle peak current, and the signal of peak current ILPK institute reference is power rectifier signal and dc error signal multiplied result, so its waveform is identical with the current commutates signal, therefore, peak current connects and the waveform of formation, will be identical with the power rectifier waveform, and the average waveform of inductive current, also can be similar to the power rectifier waveform by the utmost point, and then reach the purpose of power factor correction.
The present invention makes the power factor corrector installed in the switch type power supplying device can shared same winding (primary side winding), to obtain zero current detection signal and power supply respectively, special in this switch type power supplying device 50, consult shown in Figure 7, the power factor corrector that is numbered L6561 60 that one SGS-THomson company is produced is installed, each pin of this corrector 60 is by its purposes, be connected with control circuit in this switch type power supplying device 50 respectively, it finishes the purpose of power factor correction to the transducers in this switch type power supplying device 50.In the present invention, because the voltage on the primary side winding 71 of the inductor 70 in this transducer, the amplitude that includes civil power 60Hz, so the number of turns ratio of this primary side winding 71 must meet the restriction of aforementioned formula (1), this is because the anode VCAP (+) of the rectifying and wave-filtering capacitor C 1 in the power supply circuits of being responsible for powering 81, consult Fig. 5, shown in 7, the amplitude that does not contain civil power 60Hz, if resistance R 2 of anode VCAP (+) series connection from this filter capacitor C1, be connected to the zero current detecting pin ZCD of this corrector 60, though can eliminate civil power 60Hz effect on amplitude, but when higher input voltage vin, the negative edge voltage VZCD of decline on the zero current detecting pin ZCD can't be lower than 1.6V, consult shown in Figure 8ly, the power factor correctors 25 that cause triggering in this corrector 60 produce the controlling signal that can make switch mosfet 80 conductings, therefore, merely the practice from anode VCAP (+) the series resistance R2 of this filter capacitor C1 to the zero current detecting pin ZCD of corrector 60 is obviously infeasible.
For addressing this problem, the present invention has increased another resistance R 1, with on its negative terminal VCAP (-) that is connected on this filter capacitor C1 and the circuit that this secondary winding 71 is connected, consult shown in Figure 9, form a zero current circuit for detecting 82 with this resistance R 2, wherein, elementary winding 72.At this moment, the terminal voltage of the zero current detecting pin ZCD of this corrector 60, can be subjected to its inner restriction of clamp circuit up and down, and there is not the influence of civil power 60Hz, then can not be subjected to the restriction of formula (1), make the zero current detecting pin ZCD and the power supply pin Vcc of corrector 60 can pass through this zero current circuit for detecting 82 and power supply circuits 81 shared these primary side windings 71 respectively, its test waveform as shown in figure 10, the stray capacitance at this another resistance R 1 and its end end, can cause time delay, so the resistance value of this resistance R 1 is the smaller the better, and its minimum value be limited in the electric current that allow to flow into or flow out zero current detecting pin ZCD and be no more than ± scope of 3mA in, therefore, when being 10K ohm as if its resistance value, maximum current can not surpass 1.8mA.In addition, in the present invention, because this resistance R 2 is used for booster tension, so its resistance value is relatively good.Therefore, the supply power voltage (Vcc) that the power supply pin Vcc of this corrector 60 is obtained can calculate according to following formula:
Voltage VF=0.4V with output voltage V o=400V, primary side ratio of winding n=22, primary side capacitor C 2 is an example, calculate Vcc by formula (2) and equal 17.4V, less than 18V, the specification limits that meets this L6561 power factor corrector 60, it starts waveform as shown in figure 11, shows that wherein measured value is 17.3V.In the present invention, when this zero current circuit for detecting 82 and power supply circuits 81 generation overvoltage, superpotential phenomenon also can take place in the power supply pin Vcc of this L6561 power factor corrector 60, so can be in the resistance R 3 of one 10 ohm of power supply pin Vcc end series connection, with the restriction supply power voltage, prevent superpotential situation.
According to the above, the present invention can be confirmed by concrete experimental data, the zero current detecting pin ZCD of the power factor corrector of being installed in this switching power supply 50 60 and power supply pin Vcc, can be in the number of turns that is not subjected to winding than under limiting, respectively by two resistance R 1, R2 and power supply circuits 81 in the zero current circuit for detecting 82, shared primary side winding 71, need not additionally to set up zero current detecting winding, can reduce the complexity and the manufacturing cost of circuit effectively, and further dwindle the volume of power supply unit.
The above only is a preferable embodiment of the present invention, and protection scope of the present invention is not limited thereto; any people who is familiar with this technology; in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (4)
1, a kind of auxiliary circuit with power factor corrector is characterized in that comprising:
A transducer comprises an elementary winding and a secondary winding in this transducer;
Power supply circuits comprise a filter capacitor in these power supply circuits, this filter capacitor is connected to a side of secondary winding;
A zero current circuit for detecting comprises two resistance at least in this zero current circuit for detecting, an end of each resistance is connected to the anode and the negative terminal of filter capacitor respectively, and the other end is connected to the zero point detection pin of power factor corrector;
A power factor corrector, the zero current detecting pin on this power factor corrector is connected with the zero current circuit for detecting, and the power supply pin on it is connected with power supply circuits;
A diverter switch, this diverter switch are connected with pin and elementary winding on the power factor corrector respectively, according to the trigger signals that this pin transmits, switch.
2, auxiliary circuit as claimed in claim 1 is characterized in that: power factor corrector is the power factor corrector of boundary scheme.
3, auxiliary circuit as claimed in claim 1 is characterized in that: the negative terminal of filter capacitor is connected to secondary winding, and its anode is to be connected to the power supply pin by power supply circuits.
4, auxiliary circuit as claimed in claim 1 wherein is connected to the resistance value of filter capacitor negative terminal, is less than the resistance value that is connected to this filter capacitor anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02128686 CN1275376C (en) | 2002-08-12 | 2002-08-12 | Auxiliary circuit for power factor read just apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02128686 CN1275376C (en) | 2002-08-12 | 2002-08-12 | Auxiliary circuit for power factor read just apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1476154A CN1476154A (en) | 2004-02-18 |
| CN1275376C true CN1275376C (en) | 2006-09-13 |
Family
ID=34143782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02128686 Expired - Fee Related CN1275376C (en) | 2002-08-12 | 2002-08-12 | Auxiliary circuit for power factor read just apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1275376C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5387183B2 (en) * | 2009-07-08 | 2014-01-15 | サンケン電気株式会社 | Power factor correction circuit |
| CN102202438A (en) * | 2010-03-22 | 2011-09-28 | 立锜科技股份有限公司 | Power supply device for reducing power consumption |
| CN101860194B (en) * | 2010-05-14 | 2012-10-17 | 北方工业大学 | Implementation method and device of multi-mode power factor corrector |
| CN103207302B (en) * | 2012-01-17 | 2015-07-29 | 珠海格力电器股份有限公司 | Detection circuit and power correction circuit for inductor discharge current |
| CN103199698A (en) * | 2012-12-14 | 2013-07-10 | 华南理工大学 | Hybrid control method of buck-boost convertor |
| CN112636347B (en) * | 2020-12-09 | 2021-06-08 | 民广电气科技有限公司 | Intelligent power filtering control system, method and storage medium |
| CN113489305B (en) * | 2021-05-24 | 2022-07-01 | 杭州洲钜电子科技有限公司 | Nonlinear variable frequency carrier system and method based on PFC harmonic suppression and storage medium |
-
2002
- 2002-08-12 CN CN 02128686 patent/CN1275376C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1476154A (en) | 2004-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Poorali et al. | Analysis of the integrated SEPIC-flyback converter as a single-stage single-switch power-factor-correction LED driver | |
| Cheng et al. | A novel single-stage high-power-factor AC/DC converter featuring high circuit efficiency | |
| CN101582633B (en) | Three-phase boosting and deboosting power factor correction circuit and control method thereof | |
| CN1085435C (en) | Switching regulator | |
| CN105453380A (en) | Apparatus and method for grid-to-vehicle battery charging | |
| CN101588139A (en) | High power factor isolated buck-type power factor correction converter | |
| US6847195B2 (en) | Auxiliary circuit for power factor corrector having self-power supplying and zero current detection mechanisms | |
| Fardoun et al. | A comparison between three proposed bridgeless Cuk rectifiers and conventional topology for power factor correction | |
| Xu et al. | A novel closed loop interleaving strategy of multiphase critical mode boost PFC converters | |
| CN111869069A (en) | Power-controlled capacitor circuit and control method thereof | |
| Sasikala et al. | Review of AC-DC power electronic converter topologies for power factor correction | |
| CN1275376C (en) | Auxiliary circuit for power factor read just apparatus | |
| CN1308407A (en) | Single-phase power factor correcting step-up converter | |
| Kishore et al. | Single-phase PFC converter using modified multiplier SEPIC converter for high voltage DC applications | |
| CN112689363B (en) | Power converter | |
| Alonso et al. | Using input current shaper in the implementation of high-power-factor electronic ballasts | |
| Shrivastava et al. | A universal input single-stage front end power factor corrector for HB-LED lighting applications | |
| Udumula et al. | Voltage mode control dcm hsd-cib pfc converter for hb-led lighting applications | |
| TW201403287A (en) | A control method and apparatus for reducing total current harmonic distortion and output current by primary-side control of power factor corrector in LED power driver | |
| Moon et al. | An interleaved single-stage flyback AC-DC converter with wide output power range for outdoor LED lighting system | |
| CN2596662Y (en) | Switcher for changing DC into AC | |
| CN101878675B (en) | Illumination means operating device, particularly for LEDs, with electrically isolated PFC | |
| Praba et al. | Design and implementation of bridgeless AC/DC PFC sepic converter with valley-fill circuit | |
| CN214592078U (en) | LED driving power supply meeting European Union standard | |
| Farcas et al. | A novel topology based on forward converter with passive power factor correction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060913 Termination date: 20170812 |