CN201017251Y - Electric capacity voltage dividing type DC voltage-stabilized power supply - Google Patents
Electric capacity voltage dividing type DC voltage-stabilized power supply Download PDFInfo
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Abstract
The utility model relates to a capacitance-voltage-dividing type direct current stabilized voltage supply. The purpose of the utility model lies in providing a novel method to efficiently obtain a low-voltage direct current source from an alternating current electrical source. In order to realize the purpose, a technical disposal proposal of the utility model is that the voltage of an alternating current main supply is divided by the capacitance to obtain a quite proper low-voltage alternating current, and the needed direct current stabilized voltage supply is obtained after rectificating, wave-filtering and voltage-stabilizing. Besides the prior direct current stabilized voltage supply of the type that a transformer reduces the voltage and the direct current stabilized voltage supply of a switch electrical source type, the utility model provides a novel method to obtain a low-voltage direct current source from an alternating current source that is the capacitance-voltage-dividing type direct current stabilized voltage supply which conquers the problems of the former two methods of light load or rapid decline of the efficiency under the state of stand-by. The utility model only consumes little power when under no-load or light load and has a protection function of an automatic current limiting; in addition, the utility model is capacitive in an alternating current network, which can take effect of a power factor compensation. The utility model is used for reducing the light load or energy consumption of stand-by of an electric appliance with obvious energy-saving effect; the utility model can also used as a power factor compensator, which can improve the electro-power factor, reduce the power waste, absorb the harmful pulse of a power network and improve a harmonic current of the alternating current network; the utility also has the function of power-saving, which changes a reactive power into an active power, so the utility model is a real green electrical source.
Description
Technical field
The utility model belongs to the D.C. regulated power supply technical field, particularly relates to the ultralow stand-by power consumption high-level efficiency of a kind of employing capacitance partial pressure type D.C. regulated power supply.
Background technology
Global energy faces a crisis, and the consumption that how as far as possible to reduce the energy has become a urgent problem.Electrical equipment obtains the dc energy source source that low-voltage dc power supply is a kind of economy from AC power, method commonly used has transformer step-down type dc stabilized voltage supply and type switching power D.C. regulated power supply, but require for low power consuming, these two kinds of methods all are defective: in the transformer step-down type dc stabilized voltage supply, Industrial Frequency Transformer exists iron loss and copper loss, itself also can generate heat, and efficient is very low, when unloaded only the transformer power consumption will reach several watts; Though and the type switching power D.C. regulated power supply has saved Industrial Frequency Transformer, but under underloading or holding state, because of the dutycycle of switching pulse very low, must under the high voltage of AC power rectifying and wave-filtering, obtain working power again, this moment is as long as a little quiescent current and switching loss will consume many power, direct current is pressed with 310V behind the alternating current 220V rectifying and wave-filtering, this moment, on-off circuit was even have only the 10mA electric current, no-load power consumption is just above 3 watts, its efficient is also very low, and in fact the high-level efficiency of Switching Power Supply records under rated power.The rapid decline of efficient is the common fault of existing power supply equipment under underloading or the holding state, but underloading or holding state are again the duties that electrical equipment is in daily use, obtaining the power supply step-down as charger for mobile phone by the alternating current 220V place, to come the lithium cell charging to 3.6V be light condition, as infrared remote control holding state of household electrical appliances or the like; Reduce electrical equipment underloading or standby energy consumption and mean that not only the consumer saves the electricity consumption spending, to alleviating the energy pressure that is becoming tight day positive role is arranged, more direct is to have reduced energy dissipation and environmental protection pressure.In view of above reason, the utility model is outside existing transformer step-down type dc stabilized voltage supply and type switching power D.C. regulated power supply, a kind of new method that obtains low-voltage dc power supply from AC power has been proposed: capacitance partial pressure DC voltage stabilizing power source, overcome the problem that efficient sharply descends under preceding two kinds of method underloadings or the holding state, the effect that has power factor compensation simultaneously is in the hope of making useful contribution to the consumption that reduces the energy.
The utility model content
The purpose of this utility model is to provide a kind of new method that obtains low-voltage dc power supply from the AC power high-level efficiency: capacitance partial pressure DC voltage stabilizing power source.For achieving the above object, technical solution of the present utility model is: electric main obtains a comparatively suitable low-voltage AC with capacitance partial pressure earlier, obtains needed D.C. regulated power supply through the rectifying and wave-filtering voltage stabilizing again.
Before this, using electric capacity is to adopt capacitance current-limiting from the method that electric main obtains stabilized voltage supply, behind rectifying and wave-filtering again by stabilivolt or shunt regulating circuit voltage stabilizing, one of its shortcoming is when load is lighter or unloaded, its electric current is most of or all absorbed by stabilivolt or shunt regulating circuit, efficient is very low, and efficient is minimum when unloaded, and its power is done not quite; Two of its shortcoming is: the very high DC voltage of script is actually by stabilivolt and is bearing behind the rectifying and wave-filtering, and when stabilivolt inefficacy in a single day, then this DC voltage will directly be added in the load, the circuit of breaking immediately probably.So this power supply had not both met high efficiency energy-conservation requirement, can not be used for replacing common stabilized voltage supply.The utility model will break traditions, and release new application process.
Fig. 1 is a capacitance partial pressure rectifying and wave-filtering synoptic diagram in the utility model capacitance partial pressure DC voltage stabilizing power source.The capacitance partial pressure rectifying and wave-filtering is core of the present utility model, and it is made up of capacitor C 1C2, rectifier bridge BR1, stabilivolt DZ1, electrochemical capacitor C3.Electric main ACin is through the C1C2 dividing potential drop, and gained alternating voltage effective value is AC1=[C1/ (C1+C2)] * ACin (formula one), wherein ACin is the AC-input voltage effective value; AC1 is through the BR1 full-bridge rectification, and C3 filtering obtains without voltage stabilizing and do not have and DC voltage Vo that electrical network is isolated Vo ≈ 1.414AC1=1.414[C1/ (C1+C2) during zero load] * ACin (formula two).Here stabilivolt DZ1 is used for voltage stabilizing among Fig. 1; the value of DZ1 is slightly higher than the maximal value of Vo; be be used for absorbing electric main through the C1C2 dividing potential drop again the pulse voltage through occurring behind the rectifying and wave-filtering or this power circuit under extreme case as when just outage has been switched on again at once the transient voltage that may occur; with protection voltage stabilizing IC, DZ1 not power consumption when operate as normal.
This DC voltage Vo is characterized in owing to be gained behind the capacitance partial pressure rectifying and wave-filtering: its approximate constant current source, and internal resistance is bigger, and output voltage characteristic is relatively poor.It seems that these characteristics are shortcomings, and it includes three very important advantages in fact: first Fig. 1 circuit is at work without any the element of consumed power, and it is not power consumption when zero load! It two is that Fig. 1 circuit has the automatic current limiting function, is not afraid of short circuit, and its power consumption sharply reduces on the contrary during short circuit; It three is that Fig. 1 circuit also has very valuable characteristics: be capacitive in AC network, can play the effect of power factor compensation.How to bring into play its advantage, allowing Fig. 1 circuit can enter practicality is greatest problem to be solved in the utility model.
We carefully look at Fig. 1 circuit, its VD Vo ≈ 1.414[C1/ (C1+C2) when unloaded] * ACin (formula two), its maximum short circuit current Imax is determined by C1 during short circuit, Imax=ACin ω C1 (formula three), and wherein ω is the AC-input voltage angular frequency.When load is arranged, according to the maximum transmitted principle, when load strengthens gradually, when its peak power output occurred in 1/2 * Vo, electric current I o=K * 1/2 * Imax (formula four) can claim that Io is a maximum operating currenbt at this moment, K slightly descends the C1 both end voltage when selected Vo is higher and a coefficient producing, K=(1.414ACin-1/2 * Vo)/1.414ACin (formula five), in most cases K=0.9-1.0 can be similar to when selected Vo is not too high and get K=1.As long as our designed voltage-stabilized power supply circuit can normally be operated between the 1/2 * Vo to Vo, just can be in D.C. regulated power supply the capacitance partial pressure circuit application, key issue wherein is that the electric current of this mu balanced circuit when unloaded must be especially little, could realize ultralow power consumption requirement, and this can accomplish.Below will in embodiment, illustrate using method with the several application circuit.
Fig. 2 to Fig. 6 is that the utility model capacitance partial pressure DC voltage stabilizing power source application circuit one is to circuit five schematic diagrams, the D.C. regulated power supply of not isolating with several AC power is an example, and the utility model using method and computing method in actual applications have been described in more detail.See embodiment for details.The capacitance partial pressure DC voltage stabilizing power source that AC power is not isolated not needing to can be used for the televisor, electromagnetic oven on electrical equipment that AC power isolates such as air-conditioning, hot chassis etc. as low-power consumption D.C. regulated power supply or low power consumption standby power supply.
For the electrical equipment that needs AC power to isolate, can behind Fig. 1 circuit, adopt the low input voltage switch power supply of isolated form, to adapt to it than the low VD of the direct rectifying and wave-filtering of AC power, such power supply can have lower power consumption, its circuit adopts the integrated circuit of different manufacturers that a variety of modes can be arranged, and Fig. 7 provides schematic block circuit diagram and its principle of work is made analysis.Schematic block circuit diagram is seen Fig. 7, only lifts a specific embodiment and sees Fig. 8.Adopt this isolated form capacitance partial pressure DC switching power supply, because the operating voltage of Switching Power Supply is low a lot, the switching loss of its quiescent dissipation and switching tube has also reduced a lot, and Switching Power Supply is operated under the extremely low dutycycle state, thereby promoted the efficient of stabilized voltage supply; Moreover the low requirement that has also reduced Switching Power Supply of operating voltage, not only reduced cost, also make the design of Switching Power Supply easier.The capacitance partial pressure DC voltage stabilizing power source that AC power is isolated can directly replace existing stabilized voltage supply and be used for most of electrical equipment.
The utility model is more obvious with respect to the stabilized voltage supply advantage of using the filtering of transformer step-down rectifier: saved the Industrial Frequency Transformer of heavy poor efficiency, promoted the efficient of direct supply, and had the power factor compensation effect.
In sum, thus the utility model can replace the utilization factor that existing stabilized voltage supply improves power supply fully in a lot of fields.The utility model is outside traditional transformer step-down type dc stabilized voltage supply and type switching power D.C. regulated power supply, a kind of method that obtains low-voltage dc power supply from AC power has been proposed again, the utility model is not only own just energy-conservation simultaneously, and the power factor compensation effect that is had will play a role in improving to the power factor that AC network goes from bad to worse.Take a broad view household electrical appliance, we can say almost except incandescent lamp, the power factor of all electrical equipment is all very low, used its power factor of electrical equipment of factory is lower, make the power factor of present AC network go from bad to worse, the generating plant must use expensive high-capacity power factor compensator to concentrate and adjust power factor, but also improvement can only be arranged slightly, because of being concentrates the adjustment effect unsatisfactory, if can promote the utility model, not only itself is just energy-conservation, and the power factor that can also spread out to AC network plays the improvement effect, and its economic benefits are very considerable.
The beneficial effects of the utility model are: a kind of new method that obtains low-voltage dc power supply from the AC power high-level efficiency is provided, it only consumes power seldom when zero load or standby, have the automatic current limiting function, be not afraid of short circuit, and have the characteristics that power consumption sharply reduces on the contrary during short circuit; It is capacitive in AC network in addition, can play the effect of power factor compensation, and this point is very valuable, and is very useful to the consumption that reduces the energy.The utility model is used to reduce the electrical equipment underloading or standby energy consumption has remarkable energy saving effect, and can be used as power-factor compensator, can improve harmful pulse of electric power factor, minimizing power attenuation, absorption electrical network, and has an electricity-saving function, reactive power is changed into active power, is real green power supply! The utility model uses if be generalized in the various electrical equipment, can reduce the consumption of the energy, and can improve the harmonic current of AC network, promote the power factor of AC network, to alleviating the energy pressure that is becoming tight day positive role is arranged, can not only make the consumer save the electricity consumption spending, more direct is to have reduced energy dissipation and environmental protection pressure, all very useful to family to state.
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Description of drawings
Capacitance partial pressure rectifying and wave-filtering synoptic diagram in Fig. 1 the utility model capacitance partial pressure DC voltage stabilizing power source;
Fig. 2 the utility model capacitance partial pressure DC voltage stabilizing power source application circuit one schematic diagram;
Fig. 3 the utility model capacitance partial pressure DC voltage stabilizing power source application circuit two schematic diagrams;
Fig. 4 the utility model capacitance partial pressure DC voltage stabilizing power source application circuit three schematic diagrams;
Fig. 5 the utility model capacitance partial pressure DC voltage stabilizing power source application circuit four schematic diagrams;
Fig. 6 the utility model capacitance partial pressure DC voltage stabilizing power source application circuit five schematic diagrams;
Fig. 7 the utility model capacitance partial pressure DC voltage stabilizing power source adopts the low input voltage switch power circuit principle block diagram of isolated form;
Fig. 8 the utility model capacitance partial pressure DC voltage stabilizing power source application circuit six schematic diagrams.
Embodiment
1, Fig. 1 is a capacitance partial pressure rectifying and wave-filtering synoptic diagram in the utility model capacitance partial pressure DC voltage stabilizing power source.With an example each CALCULATION OF PARAMETERS method is described: routine AC supply voltage ACin=220V, ac power frequency 50Hz, design a unloaded output voltage V o=36V, maximum operating currenbt Io is the direct supply of 150mA, according to formula three and formula four, Imax=0.3A, C1=Imax/ACin ω=0.3/ (220 * 6.28 * 50) ≈ 4.3 * E-6 (F)=4.3UF can adopt the electric capacity of 630 volts of 4.3 microfarads; According to formula two, (C1 * ACin/0.707Vo)-C1=(4.3 * 220/0.707 * 36)-4.3 ≈ 33UF can adopt the electric capacity or the nonpolarity electrochemical capacitor of 63 volts of 33 microfarads can to get C2=; The choosing method of electrochemical capacitor C3 is identical with the conventional DC power supply, can select 50 volts of 470 microfarads for use, stabilivolt DZ1 be used for absorbing pulse voltage in the electrical network or this power circuit under extreme case as when just outage has been switched on again at once the transient voltage that may occur, the big 25%-30% of the comparable Vo of its value, Vo value when promptly higher than the alternating voltage input is slightly high, can select for use 47V/3W or transient voltage to suppress diode P6KE47A (47V/5W, transient peak power 600W/1ms), DZ1 not power consumption when operate as normal; This circuit without any the element of consumed power, is a power factor compensation circuit that is made of C1C2 when zero load.This circuit no-load power consumption is zero, and peak power output is Vo * Io/2=2.7W.
2, Fig. 2 is the utility model capacitance partial pressure DC voltage stabilizing power source application circuit one schematic diagram, adopt HT7105 or homemade 7105, little pressure reduction voltage stabilizing IC low in energy consumption such as 7105-1,7105A-1, output voltage 5V, maximum output current 30mA, quiescent current is the 4-5 microampere, not needing can be used for the electrical equipment of AC power isolation as low power consumption standby power supply.Minimum input voltage during the output of voltage stabilizing IC rated power is chosen as 7V, consider that alternating voltage should allow 20% fluctuation, its input voltage is 17.5V when selecting the AV220 volt, and then the highest quiescent imput voltage is 17.5 * 120%=21V, and minimum quiescent imput voltage is 17.5 * 80%=14V; According to formula three and formula four, can be regarded as C1=0.06/ (220 * 6.28 * 50) ≈ 0.87UF, can adopt the electric capacity of 630 volts of 0.91 microfarads; According to formula two, can get C2=(0.91 * 220/0.707 * 17.5)-0.91=15.3UF, can adopt the electric capacity or the nonpolarity electrochemical capacitor of 63 volts of 15 microfarads; It is 24V that the maximum of HT7105 allows input voltage, and the desirable 24V/1W of DZ1, C3 get 50 volts of electrochemical capacitors of 100 microfarads; Resistance R 0 is to discharge to C1 when AC power disconnects, and is chosen as 1M Ω or bigger.This circuit no-load power consumption only is 0.8mW, can be described as the ultra-micro power consumption D.C. regulated power supply in fact, and has the effect of power factor compensation, and be real green power supply.
Power supply IC should consider that when using the maximal value of its input voltage surpasses its maximum input voltage that allows, and specific embodiment of the utility model all has and meets this requirement.When the maximum of power supply IC allows input voltage low, but the utility model is adjusted still operate as normal slightly, minimum input voltage in the time of can making the output of voltage stabilizing IC rated power is elected as and is slightly larger than 1/2 * Vo, such as electing 0.6Vo as, just can reduce the maximal value of input voltage, certainly at this moment will increase maximum short circuit current Imax so that still have enough working currents during 0.6Vo.With Fig. 2 circuit is example, if it is 18V that the maximum of HT7105 ' allows input voltage, its input voltage is 14.5 volts when selecting the AV220 volt, then the highest quiescent imput voltage is 14.5 * 120%=17.4V, minimum quiescent imput voltage is 14.5 * 80%=11.6V, the minimum input voltage when then 11.6V * 0.6 ≈ 7V is the output of voltage stabilizing IC rated power; At this moment electric current need be amplified to 0.5Vo/ (1-0.6) Vo=1.25 doubly, according to formula three and formula four, can be regarded as C1=1.25 * 0.06/ (220 * 6.28 * 50) ≈ 1.1UF; According to formula two, can get C2=(1.1 * 220/0.707 * 14.5)-1.1 ≈ 22.5UF, the desirable 18V of DZ1.
3, Fig. 3 is the utility model capacitance partial pressure DC voltage stabilizing power source application circuit two schematic diagrams, adopt little pressure reduction voltage stabilizing IC low in energy consumption such as HT7105, be added with current expansioning circuit, output voltage 5V, maximum output current 200mA, quiescent current is the 4-5 microampere, not needing can be used for the electrical equipment of AC power isolation as low-power consumption D.C. regulated power supply or low power consumption standby power supply.Minimum input voltage when voltage stabilizer comprises the output of current expansioning circuit rated power is chosen as 7.6V, considers that alternating voltage should allow 20% fluctuation, and its input voltage is 19 volts when selecting the AV220 volt, and then minimum quiescent imput voltage is 19 * 80%=15.2V; According to formula three and formula four, can be regarded as C1=0.4/ (220 * 6.28 * 50) ≈ 5.8UF; According to formula two, can get C2=(5.8 * 220/0.707 * 19)-5.8=89UF, can adopt the nonpolarity electrochemical capacitor of 63 volts of 89 microfarads, 89 microfarads can be substituted by 33 microfarads and 56 microfarad parallel connections; DZ1 gets 24V/2W, and C3 gets 50 volts of electrochemical capacitors of 470 microfarads; R0 elects 1M Ω as.This circuit no-load power consumption is less than 1mW, can be described as the ultra-micro power consumption D.C. regulated power supply in fact, being far superior to the green power supply standard of Chinese certification of energy-conserving product management committee at domestic electric appliances energy-saving authentication rules, but also having the effect of power factor compensation, is real green power supply.
4, Fig. 4 is the utility model capacitance partial pressure DC voltage stabilizing power source application circuit three schematic diagrams, adopt 7809 voltage stabilizers commonly used, output voltage 9V, maximum output current 200mA, quiescent current is about 4 milliamperes, not needing can be used for the electrical equipment of AC power isolation as low-power consumption D.C. regulated power supply or low power consumption standby power supply.Minimum input voltage during the output of voltage stabilizer rated power is chosen as 12V, considers that alternating voltage should allow 20% fluctuation, and its input voltage is 30 volts when selecting the AV220 volt, and then minimum quiescent imput voltage is 30 * 80%=24V; According to formula three and formula four, can be regarded as C1=0.4/ (220 * 6.28 * 50) ≈ 5.8UF; According to formula two, can get C2=(5.6 * 220/0.707 * 30)-5.6=54UF, can adopt the nonpolarity electrochemical capacitor of 63 volts of 54 microfarads, 54 microfarads can be substituted by 33 microfarads and 22 microfarad parallel connections; DZ1 gets 39V/3W or P6KE39A (39V/5W, transient peak power 600W/1ms), and C3 gets 50 volts of electrochemical capacitors of 470 microfarads; R0 elects 1M Ω as.This circuit no-load power consumption is about 120mW, its quiescent dissipation still is significantly less than the power consumption of common power, still be far superior to the green power supply standard of Chinese certification of energy-conserving product management committee at domestic electric appliances energy-saving authentication rules, but also have the effect of power factor compensation, be real green power supply.
5, Fig. 5 is the utility model capacitance partial pressure DC voltage stabilizing power source application circuit four schematic diagrams, adopt the stabilized voltage supply of inventor's autonomous Design, output voltage, output current can design with the need, quiescent current is about 1mA, pressure reduction is hanged down in input and output, efficient is very high, not needing can be used for the electrical equipment of AC power isolation as D.C. regulated power supply.If output voltage 12V, maximum output current 200mA, the minimum input voltage the during output of voltage stabilizer rated power is chosen as 15V, considers that alternating voltage should allow 20% fluctuation, its input voltage is 37.5 volts when selecting the AV220 volt, and then minimum quiescent imput voltage is 37.5 * 80%=30V; According to formula three and formula four, can be regarded as C1=0.4/ (220 * 6.28 * 50) ≈ 5.8UF, because of operating voltage is slightly high, consider the electric capacity that C1 can adopt 630 volts of 6.2 microfarads that influences of COEFFICIENT K; According to formula two, can get C2=(6.2 * 220/0.707 * 37.5)-6.2=45UF, can adopt the nonpolarity electrochemical capacitor of 63 volts of two 22 microfarads; DZ1 gets 47V/3W or P6KE47A (47V/5W, transient peak power 600W/1ms), and C3 gets 50 volts of electrochemical capacitors of 470 microfarads; R0 elects 1M Ω as.The Q1Q2 enlargement factor is about 100, about 10 microamperes of Q1 electric current, and about 1 milliampere of Q2 electric current, Q3 are middle power tube or high-power darlington pipe, can adopt the high-power darlington pipe when output current is big, can certainly adopt MOS FET pipe.This circuit no-load power consumption is about 40mW, and its quiescent dissipation is significantly less than the power consumption of common power, but also has the effect of power factor compensation, is real green power supply.
Its working range of the stabilized voltage supply of inventor's autonomous Design is very wide, and the maximum input voltage that allows can be than voltage stabilizing IC height commonly used, flexible design as required.
6, Fig. 6 is the utility model capacitance partial pressure DC voltage stabilizing power source application circuit five schematic diagrams, adopt LM2675-5 Switching Power Supply IC, output voltage 5V, maximum output current 500mA, quiescent current is about 2.5mA, not needing can be used for the electrical equipment of AC power isolation as D.C. regulated power supply.Minimum input voltage during the output of voltage stabilizer rated power is chosen as 15V, consider that alternating voltage should allow 20% fluctuation, its input voltage is 37.5 volts when selecting the AV220 volt, then minimum quiescent imput voltage is 37.5 * 80%=30V, the maximal efficiency of LM2675 can reach 96%, output voltage 5V efficient is 90%, input current is 185mA when can be regarded as proper input voltage and being 15V output current 500mA, according to formula three and formula four, can be regarded as C1=0.37/ (220 * 6.28 * 50) ≈ 5.35UF, because of operating voltage is slightly high, consider the electric capacity that C1 can adopt 630 volts of 5.8 microfarads that influences of COEFFICIENT K; According to formula two, can get C2=(5.8 * 220/0.707 * 37.5)-5.8 ≈ 42.3UF, can adopt the nonpolarity electrochemical capacitor of 63 volts of 42 microfarads; DZ1 gets 47V/3W or P6KE47A (47V/5W, transient peak power 600W/1ms), and C3 gets 50 volts of electrochemical capacitors of 470 microfarads; R0 elects 1M Ω as.This circuit no-load power consumption is about 90mW, and its quiescent dissipation is significantly less than the power consumption of common power, but also has the effect of power factor compensation, is real green power supply.
Next introduce isolated form capacitance partial pressure DC switching power supply, this power supply has higher efficient than existing switching power supply under underloading or holding state.The switching power supply circuit adopts the integrated circuit of different manufacturers that a variety of modes can be arranged, and its schematic block circuit diagram is seen Fig. 7.
7, Fig. 7 the utility model capacitance partial pressure DC voltage stabilizing power source adopts the low input voltage switch power circuit principle block diagram of isolated form, and AC power provides DC voltage to use to Switching Power Supply behind the capacitance partial pressure rectifying and wave-filtering.Switching Power Supply is isolated and rectifying and wave-filtering through DC/DC conversion, high-frequency transformer T1, the VD after obtaining isolating, and this voltage is sent Switching Power Supply IC back to by photoelectrical coupler more again through sampling ratio and is carried out dutycycle control, has guaranteed the stable of output voltage.Owing to adopt capacitance partial pressure, the operating voltage of Switching Power Supply is low a lot, the switching loss of its quiescent dissipation and switching tube has also reduced a lot, requirement to high-frequency transformer is also low, and Switching Power Supply is operated under the extremely low dutycycle state, therefore make the utility model have higher efficient than existing switching power supply.
Write here, the inventor feels, the present invention Ruo Demeng approval, and the inventor will write could derive in more detail all formula and introduce using method and using skill in detail of a book specially, so that this invention enters practicality better.At this as space is limited, isolated form capacitance partial pressure DC switching power supply is only lifted a specific embodiment and is seen Fig. 8.
8, Fig. 8 is the utility model capacitance partial pressure DC voltage stabilizing power source application circuit six schematic diagrams, adopt UC3842 Switching Power Supply IC, output voltage 12V, maximum output current 500mA, can be used for the D.C. regulated power supply of ordinary appliances as isolated form, because adopt low input, the quiescent dissipation of this power supply and underloading power consumption are significantly less than the conventional switch power supply.The quiescent imput voltage of choosing switching regulator is one of five parts behind the direct rectifying and wave-filtering of alternating voltage about 62V, consider that alternating voltage should allow 20% fluctuation, then minimum quiescent imput voltage is 62 * 80% ≈ 50V, input voltage during rated power output is 25V, the efficient of Switching Power Supply can accomplish 85% like a cork, input current when then rated power is exported is 282mA, according to formula three and formula four, can be regarded as C1=0.564/ (220 * 6.28 * 50) ≈ 7.54UF, because of this input voltage higher, consider the influence of COEFFICIENT K, here K=(1.414 * 220-25)/(1.414 * 220)=0.92 (formula five), C1 can adopt the electric capacity of 630 volts of 7.54/0.92=8.2 microfarads; According to formula two, can get C2=(8.2 * 220/0.707 * 62)-8.2=33UF, can adopt the electric capacity or the nonpolarity electrochemical capacitor of 80 volts of 33 microfarads; DZ1 gets 75V/3W or P6KE75A (75V/5W, transient peak power 600W/1ms), and C3 gets 80 volts of electrochemical capacitors of 1000 microfarads; R0 elects 1M Ω as; UC3842 and peripheral circuit thereof be design according to a conventional method still, will notice that just operating voltage is lower.Because of quiescent imput voltage is that ac voltage rectifier is one of filtered five parts, this circuit no-load power consumption also just is about one of five parts of regular tap power supply, being significantly less than the power consumption of regular tap power supply, and having the effect of power factor compensation, is real green power supply.
From above specific embodiment as can be seen: the utility model is if promoted, China certification of energy-conserving product management committee is limited to 3W at domestic electric appliances energy-saving authentication rules with the standby energy consumption standard of China's household electrical appliances and will be popularized with interior green power supply standard, and the long-term endeavour target of " 1 watt of stand-by power consumption " that International Energy Agency is formulated also will realize ahead of time!
Be pointed out that at last: along with the progress of material and technology, the electric capacity of producing high voltage large capcity now has been easy to, and such as CBB electric capacity and leaded multilayer ceramic capacitor, price is not high, and nonpolarity electrochemical capacitor also obtains easily.Along with popularization of the present utility model, will promote the development of new material and new technology, the cost of high voltage large capcity electric capacity also can reduce greatly when the time comes, to further promote again conversely of the present utility modelly to popularize and develop to high-power, its cost will be starkly lower than traditional direct supply, and can reduce the consumption of non-ferrous metal, of the present utility model popularizing will be played very big effect to effective use of energy sources.
Claims (4)
1. capacitance partial pressure DC voltage stabilizing power source, it is made up of capacitor C 1C2, rectifier bridge BR1, stabilivolt DZ1, electrochemical capacitor C3 and direct current stabilizer, it is characterized in that: electric main is by the C1C2 dividing potential drop, the BR1 full-bridge rectification, C3 filtering, DZ1 absorption transient voltage are after DC voltage-stabilizing forms capacitance partial pressure DC voltage stabilizing power source.
2. capacitance partial pressure DC voltage stabilizing power source according to claim 1, it is characterized in that: a utmost point of described capacitor C 1 connects a utmost point of AC power, another utmost point of C1 connects the utmost point of C2 and the ac input end of BR1, another utmost point of C2 connects another ac input end of BR1 and another utmost point of incoming transport power supply, the anode output of BR1 connects the negative pole of DZ1 and the positive pole of C3, the output of the negative terminal of BR1 connects the positive pole of DZ1 and the negative pole of C3, to obtain without voltage stabilizing and not have and the DC voltage of electrical network isolation.
3. capacitance partial pressure DC voltage stabilizing power source according to claim 1 is characterized in that: described without voltage stabilizing and do not have and the DC voltage of electrical network isolation obtains the D.C. regulated power supply that AC power is not isolated through DC voltage-stabilizing.
4. capacitance partial pressure DC voltage stabilizing power source according to claim 1 is characterized in that: described without voltage stabilizing and do not have and DC voltage that electrical network is isolated obtains the D.C. regulated power supply of AC power isolation through the switching power supply of isolated form.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007200066945U CN201017251Y (en) | 2007-04-04 | 2007-04-04 | Electric capacity voltage dividing type DC voltage-stabilized power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007200066945U CN201017251Y (en) | 2007-04-04 | 2007-04-04 | Electric capacity voltage dividing type DC voltage-stabilized power supply |
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| CN201017251Y true CN201017251Y (en) | 2008-02-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102870060A (en) * | 2010-03-30 | 2013-01-09 | 伊莱克斯家用产品股份有限公司 | Circuit layout of household appliances |
| CN103427683A (en) * | 2013-08-30 | 2013-12-04 | 昆山奥德鲁自动化技术有限公司 | Voltage-stabilizing power circuit |
| CN103427675A (en) * | 2012-05-21 | 2013-12-04 | 施耐德电气东南亚(总部)有限公司 | Converter for converting alternating current into direct current |
| CN103560683A (en) * | 2013-09-11 | 2014-02-05 | 昆山新金福精密电子有限公司 | Voltage-stabilizing power supply |
| CN106301035A (en) * | 2016-09-30 | 2017-01-04 | 成都烨辰新材料科技有限公司 | Overvoltage filter control circuit for Intelligent clothes cabinet |
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2007
- 2007-04-04 CN CNU2007200066945U patent/CN201017251Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102870060A (en) * | 2010-03-30 | 2013-01-09 | 伊莱克斯家用产品股份有限公司 | Circuit layout of household appliances |
| CN102870060B (en) * | 2010-03-30 | 2014-12-31 | 伊莱克斯家用产品股份有限公司 | Circuit layout of household appliances |
| CN103427675A (en) * | 2012-05-21 | 2013-12-04 | 施耐德电气东南亚(总部)有限公司 | Converter for converting alternating current into direct current |
| CN103427683A (en) * | 2013-08-30 | 2013-12-04 | 昆山奥德鲁自动化技术有限公司 | Voltage-stabilizing power circuit |
| CN103560683A (en) * | 2013-09-11 | 2014-02-05 | 昆山新金福精密电子有限公司 | Voltage-stabilizing power supply |
| CN106301035A (en) * | 2016-09-30 | 2017-01-04 | 成都烨辰新材料科技有限公司 | Overvoltage filter control circuit for Intelligent clothes cabinet |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20100404 |