CN1881768A - Power supply conversion device and method therefor - Google Patents
Power supply conversion device and method therefor Download PDFInfo
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- CN1881768A CN1881768A CN 200510077591 CN200510077591A CN1881768A CN 1881768 A CN1881768 A CN 1881768A CN 200510077591 CN200510077591 CN 200510077591 CN 200510077591 A CN200510077591 A CN 200510077591A CN 1881768 A CN1881768 A CN 1881768A
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- voltage
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- power supply
- energy
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Abstract
The invention relates to a power converter and relative method, wherein it uses one low-voltage collect unit to collect the low-voltage electricity of alternative-current power supply, and stores the low-voltage electricity into one energy storage unit, to generate direct-current voltage; the low-voltage collect unit uses one critical voltage of voltage set circuit to be compared with the alternative-current power, to output one control signal; said control signal can control one storage control circuit which is connected to the voltage set circuit and the energy storage unit, to be controlled by said control signal, to store the low-voltage power into the energy storage unit.
Description
Technical field
The present invention is a kind of power supply change-over device, refers to a kind of lower wattage power supply conversion equipment that AC power converts DC power supply to that is used in especially.
Background technology
Semi-conductor industry development in recent years is rapid, and various control IC and microcomputer controller be miniaturization and province's electrification all, but all needs the DC power supply of a low pressure, uses with the energy that is provided as the control circuit action.Therefore electric main 110V/220V AC system changes the technology of low-voltage DC potential sources such as 12V, 5V, 3.3V, just becomes an important ring of commercial Application, just the flourish main cause of DC power supply correlative technology field.
The basic technology principle of DC power supply commonly used has two types: one is the linear amplification formula, and one is switched.The major advantage of switched DC power supply is the efficient height, volume is little, cost is low, but if power output is when very little, and in for example 10 watts, 5 watts or the littler wattage, its advantage may complete obiteration and the anti-shortcoming that becomes.So in the DC power supply of low-power output, the technology that is adopted is still based on linear amplification formula principle, but linear amplification formula circuit commonly used must use low-frequency transformer or high pressure polarity free capacitor, cooperate rectifier diode and filter capacitor, via linear voltage decreasing or electric resistance partial pressure mode AC power is changed out required low-voltage direct electric energy again.
The design of direct current lower wattage power supply is changeed in existing simple and easy interchange, can utilize low-frequency transformer with the AC power step-down, after rectification and filtering, obtain low-voltage dc power supply again, or with AC power through capacitance partial pressure and diode rectification, again through output one low-voltage dc power supplies such as Zener diode, resistance dividing potential drop mode or the linear voltage regulation ways of transistor.This type power circuit technology has following shortcoming:
1, power supply conversion efficiency is low, and the temperature rise phenomenon is difficult for solving during power supply.
2, linear voltage decreasing mode converting electrical energy, consumed power is excessive, output is little.
3, if use the low-frequency transformer step-down, the circuit volume is difficult for miniaturization, cost height.
4, if use high pressure polarity free capacitor dividing potential drop, the circuit volume is difficult for miniaturization, ICization.
Fig. 1 is the AC/DC change-over circuit of existing first embodiment, uses a low-frequency transformer T
R1With AC power V
ACStep-down, the rectification unit 1 that utilizes diode to form again carries out rectification, then sees through capacitor C
1Filtering can obtain the direct voltage V of low pressure
DCBecause the AC/DC change-over circuit of this first embodiment need adopt low frequency silicon steel sheet transformer T
R1, when very little power output (in 3 watts), core losses and volume are all very big, though circuit is simple and can provide more high-power, also increase circuit volume, weight and cost.
Fig. 2 is the AC/DC change-over circuit of existing second embodiment, gathers (acquisition) AC power V
ACComplete positive half cycle, and common source live wire, and direct voltage V
DCDirectly from capacitor C
1End output.Because the AC/DC change-over circuit of this second embodiment uses complete positive half cycle, therefore share in resistance R
1Controlled voltage too high, and output power be decided by Zener diode ZD
1Electric current and watt level, so the power utilization rate is low, power consumption is big, power output is very little.
Fig. 3 is the AC/DC change-over circuit of existing the 3rd embodiment, gathers AC power V
ACComplete negative half period, and common source ground wire.The 3rd embodiment utilizes resistance R
1With capacitor C
1Dividing potential drop and reduce surge electric current and store charge respectively increases by an integrated regulator IC again
1To reduce ripple, press V to obtain a galvanic current
DC, because high pressure polarity free capacitor C need be set
1Survey in power supply, can improve conversion efficiency but increase circuit volume, the power output of this AC/DC change-over circuit is also very little.
Fig. 4 is the AC/DC change-over circuit of existing the 4th embodiment.AC power V
ACSee through high pressure polarity free capacitor C
1, be converted into direct voltage V through full bridge rectifier 2 again
DC, utilize Zener diode ZD again
1Voltage stabilizing and capacitor C
2Energy storage is to obtain a stable DC voltage V
DC, this circuit is owing to also need be provided with high pressure polarity free capacitor C
1In the alternating current source, also must increase the circuit volume though can improve conversion efficiency.
Learn based on above-mentioned: existing AC/DC change-over circuit must use low-frequency transformer, high pressure polarity free capacitor or electric resistance partial pressure mode, via the principle converting electrical energy of linear voltage decreasing, so can't reach power transfer loss and the integrated characteristics of reducing.
Summary of the invention
In view of this, a kind of power supply change-over device of the present invention and method thereof are to use a low-voltage collecting unit to gather the low-voltage part electric energy of AC power, and with this low-voltage part electrical power storage in an energy-storage units, in order to produce direct voltage.
Concrete technical scheme of the present invention is: a kind of power supply change-over device in order to an AC power is converted into a direct current voltage, includes: a low-voltage collecting unit, in order to gather the low-voltage part electric energy of this AC power; And an energy-storage units, be connected in this low-voltage collecting unit, store the low-voltage part electric energy of this AC power, to produce this direct voltage.
The present invention provides a kind of power conversion method in addition, and an AC power is converted into a direct current voltage, it is characterized in that step includes: the low-voltage part electric energy of gathering this AC power; Store the low-voltage part electric energy of this AC power; Reach low-voltage part electric energy, in order to produce this direct voltage according to this AC power.
A critical voltage and this AC power that low-voltage collecting unit of the present invention utilizes a voltage level initialization circuit to have configured compare, in order to export a control signal.This control signal is used for controlling an energy storage control circuit, and this energy storage control circuit is connected in this voltage level initialization circuit and this energy-storage units, is controlled by this control signal, in order to allow the low-voltage part electrical power storage of this AC power in this energy-storage units.
When AC power during, the switch element conducting in the energy storage control circuit, make energy-storage units vise instantly AC supply voltage carrying out electrical power storage, and then output produce direct voltage less than critical voltage.Groundwork principle of the present invention is to gather the electric energy of AC power when low-pressure section, and with it storage to produce lower powered direct voltage.
The present invention utilizes the principle of switching mode transmission and store electrical energy, cpable of lowering power consumption is lost, is improved power utilization rate, volume miniaturization, good DC power supply quality is provided, more can cooperate the production of integrated circuits technology to make IC, the power supply circuit of direct current is changeed in the interchange that so can obtain a minimum volume, provide logical circuit, microcomputer or the like small-power control circuit to use, to solve the shortcoming of existing AC/DC change-over circuit.
By above explanation as can be known, the present invention has following advantage:
1, being suitable for the various controllers of small-power DC power supply that need uses: power supply change-over device of the present invention, all inputs are electric main, and need the low-power control circuit person who drives with DC power supply all suitable.
2, reduce power loss: the present invention utilizes the principle of switching mode transmission and store electrical energy, reduce power consumption penalties, adopt linear voltage decreasing or dividing potential drop mode with existing AC/DC change-over circuit, more can improve the power utilization rate, good DC power supply quality is provided.
3, volume miniaturization and integrated: because power supply change-over device of the present invention need not high pressure resistant storage capacitor or low-frequency transformer step-down, the element that is adopted is except the storage capacitor of low pressure, all can cooperate integrated manufacturing technology to make IC, the lower wattage power supply conversion equipment of direct current is changeed in the interchange that so more can obtain a minimum volume.
Description of drawings
Fig. 1 is the AC/DC change-over circuit of existing first embodiment;
Fig. 2 is the AC/DC change-over circuit of existing second embodiment;
Fig. 3 is the AC/DC change-over circuit of existing the 3rd embodiment;
Fig. 4 is the AC/DC change-over circuit of existing the 4th embodiment;
Fig. 5 is a power supply change-over device circuit box schematic diagram of the present invention;
The low-voltage collecting unit that Fig. 6 uses for the present invention;
Fig. 7 uses the circuit diagram of programmable list junction transistor (PUT) as the accurate selector switch in position for the voltage level initialization circuit;
Fig. 8 uses the circuit diagram of two-carrier junction transistor (BJT) as the accurate selector switch in position for the voltage level initialization circuit;
Fig. 9 is the various current potential energy storage of a present invention control circuit schematic diagram to Figure 11;
Figure 12 is the waveform schematic diagram of Fig. 7 circuit; And
Figure 13 is the waveform schematic diagram of Fig. 8 circuit.
The figure number explanation:
Low-frequency transformer T
R1AC power V
AC
Rectification unit 1 capacitor C
1
Direct voltage V
DCIntegrated regulator IC
1
Full bridge rectifier 2 Zener diode ZD
1
Low-voltage collecting unit 10 voltage level initialization circuits 102
The accurate selector switch 1022 energy storage control circuits 104 in position
Switch element 1042 control signal V
C
Energy-storage units 20 voltage stabilizing circuits 30
AC power V
ACDirect voltage V
DCOutput voltage V
O
Embodiment
Please refer to Fig. 5, be power supply change-over device circuit box schematic diagram of the present invention.Power supply change-over device includes a low-voltage collecting unit 10 and an energy-storage units 20 connects to form, and this energy-storage units 20 is a capacitor.Low-voltage collecting unit 10 uses a critical voltage and this AC power V
ACCompare, to obtain this AC power V
ACLow-voltage part electric energy, and with this low-voltage part electrical power storage to this energy-storage units 20, to produce this output voltage V
OAbove in the narration, as this AC power V
ACThe absolute value of low-voltage part during less than this critical voltage, this AC power V
ACLow-voltage part electric energy can be stored in this energy-storage units 20.The present invention further connects a voltage stabilizing circuit 30 in this energy-storage units 20, receives and this output voltage V of filtering
ORipple, press V in order to the output galvanic current
DC, voltage stabilizing circuit 30 has common high-pressure side voltage stabilizing circuit low-pressure end voltage stabilizing circuit together according to the circuit topography branch.
Please refer to Fig. 6, be the low-voltage collecting unit of the present invention's use.This low-voltage collecting unit 10 connects an energy storage control circuit 104 by a voltage level initialization circuit 102 and forms, and voltage level initialization circuit 102 uses a critical voltage and this AC power V
ACCompare, in order to export a control signal V
CControl signal V
CControl 104 actions of this energy storage control circuit, allow this AC power V
ACLow-voltage part electric energy be stored in this energy-storage units 20.
Please refer to Fig. 7 and Fig. 8, this voltage level initialization circuit 102 connects a Zener diode D by an accurate selector switch 102A
2A, at least one resistance (R
1A, R
2A) and a rectifier diode D
1AForm.This voltage level initialization circuit 102 is according to Zener diode D
2AOperational voltage value set critical voltage, by this critical voltage and this AC power V
ACComparative result, in order to determine this control signal V
CVoltage quasi position.
Use programmable list junction transistor (PUT) as position accurate selector switch 102A, wherein Zener diode D at the voltage level initialization circuit shown in Fig. 7 102
2ABe used to trigger PUT, as AC power V
ACVoltage less than Zener diode D
2AOperating voltage the time, PUT ends, energy storage control circuit 104 conductings this moment, energy-storage units 20 beginnings are according to AC power V
ACLow-voltage part electric energy carry out the action of electric charge energy storage; As AC power V
ACGreater than Zener diode D
2AOperating voltage the time, the PUT conducting that is triggered, energy storage this moment control circuit 104 ends, energy-storage units 20 stops the action of electric charge energy storage.
Cooperate Fig. 7, please refer to Figure 12, be the waveform schematic diagram of Fig. 7 circuit.Zener diode D
2AOperating voltage be made as critical voltage V
Th, because the operating characteristics of PUT, in an AC power V
ACConducting only can be triggered in the half cycle once, and ending of PUT then utilizes AC power V
ACAnother half cycle reverse blas is closed, so energy-storage units 20 is in AC power V
ACOnly carry out electric charge energy storage action in every half cycle, i.e. time t
0-t
1, to produce output voltage V
OResistance R
1Zener diode D is provided
2Required electric current when keeping work, resistance R
2Then provide PUT to continue the required electric current of conducting, and the energy of energy storage control circuit 104 actions is provided.The semiconductor element that voltage triggered commonly used is set controlled function has PUT, UJT, DIAC, SSS, SUS... or the like that similar triggering controlled function is all arranged, as long as circuit is done adjustment slightly, all can be used as the purposes of the accurate selector switch 102A in position.
Voltage level initialization circuit 102 in Fig. 8 uses two-carrier junction transistor (BJT) as the accurate selector switch 102B in position.Zener diode D
2BBe used in equally and set the voltage level that triggers the BJT turn-on action, diode D
1BThe main principle that cooperates half-wave energy storage action, its withstand voltage is slightly larger than AC power V approximately
ACVoltage peak.Resistance R
1BZener diode D is provided
2BRequired base current when keeping work and BJT saturation conduction, resistance R
2BThen provide BJT to continue the required collector current of conducting, and the energy of energy storage control circuit 104 actions is provided.
Cooperate Fig. 8, please refer to Figure 13, be the waveform schematic diagram of the circuit of Fig. 8.According to the operating principle characteristic of BJT, as AC power V
ACInput is greater than Zener diode D
2BOperating voltage (the critical voltage V that promptly sets
Th) time, Zener diode D
2BConducting provides base current to make the BJT conducting, at this moment the control signal V of the output of voltage level initialization circuit 102
CBe low level, energy storage control circuit 104 ends, and energy-storage units 20 does not charge and load is discharged.As AC power V
ACInput is less than Zener diode D
2BOperating voltage the time, Zener diode D
2BEnd, BJT ends because of its base current is not enough, at this moment the control signal V of the output of voltage level initialization circuit 102
CBe high levle, 104 conductings of energy storage control circuit, energy-storage units 20 carries out the action of electric charge energy storage.Because AC power V
ACA half cycle in to have secondary to set position accurate period less than voltage (be time t
0-t
1With t
2-t
3), so BJT has twice by opportunity, make energy storage control circuit 104 carry out twice electric charge energy storage and clamper action, to produce output voltage V
O
According to top narration, as this AC power V
ACSubcritical voltage V
ThThe time, this control signal V
CBe high levle, this AC power V
ACBe higher than critical voltage V
ThThe time, this control signal V
CBe low level.
Please refer to Fig. 9, Figure 10 and Figure 11, this energy storage control circuit 104 is by a switch element Q
1Connect a resistance R
3And a diode D forms, the control signal V that sends when voltage level initialization circuit 102
CBe high levle, these switch element 1042 conductings, energy-storage units 20 carries out charge charging, cooperates diode D to finish the voltage clamp action, gathers AC power V to reach
ACAt the electric energy of low-pressure section, and finish output voltage V
OThe function of output.As this control signal V
CBe low level, this switch element Q
1End, this energy-storage units 20 stops charge charging, and the electric energy that will store offers the load use.Moreover, in the switch element Q shown in Fig. 9
1Be metal oxide semiconductcor field effect transistor (MOSFET) that its control signal is the voltage pattern; In the switch element Q shown in Figure 10
2Be two-carrier junction transistor (BJT) that control signal is the electric current pattern; In the switch element Q shown in Figure 11
3Be isolated gate two-carrier transistor (IGBT), its control signal is the voltage pattern.
In sum, power supply change-over device provided by the present invention, gather the low-voltage part electric energy of AC power, carry out Charge Storage by switching principle, make it have " being suitable for the various controllers that need the small-power DC power supply ", " low power consumption loss " and reach effects such as " volume miniaturizations and can amass bodyization ", be used for improving existing AC/DC change-over circuit because using low-frequency transformer, high pressure polarity free capacitor or electric resistance partial pressure mode and can't reach to reduce the power transfer loss and reach the shortcoming of amassing bodyization.
The above, only be the detailed description of the specific embodiment of one of the best of the present invention and graphic, only feature of the present invention is not limited thereto, be not in order to restriction the present invention, all scopes of the present invention should be as the criterion with following claim, all closing in the embodiment of the spirit variation similar of the present patent application claim with it, all should be contained in the category of the present invention, anyly be familiar with this skill person in the field of the invention, can think easily and variation or modify the claim that all can be encompassed in following this case.
Claims (19)
1, a kind of power supply change-over device in order to an AC power is converted into a direct current voltage, is characterized in that: include:
One low-voltage collecting unit is in order to gather the low-voltage part electric energy of this AC power; And
One energy-storage units is connected in this low-voltage collecting unit, stores the low-voltage part electric energy of this AC power, to produce this direct voltage.
2, power supply change-over device as claimed in claim 1 is characterized in that, this low-voltage collecting unit uses a critical voltage and this AC power to compare, to obtain the low-voltage part electric energy of this AC power.
3, power supply change-over device as claimed in claim 2 is characterized in that, when the absolute value of the low-voltage of this AC power part during less than this critical voltage, the low-voltage part electric energy of this AC power can be stored in this energy-storage units.
4, power supply change-over device as claimed in claim 1 is characterized in that, the low-voltage part electric energy of this AC power is the low-voltage part of the positive half cycle of this AC power or the low-voltage part of this AC power negative half period.
5, power supply change-over device as claimed in claim 1 is characterized in that, the low-voltage part electric energy of this AC power is the holocyclic low-voltage part of this AC power.
6, power supply change-over device as claimed in claim 1 is characterized in that, this energy-storage units is a capacitor.
7, power supply change-over device as claimed in claim 1 is characterized in that, further includes a voltage stabilizing circuit and is connected in this energy-storage units, in order to the ripple of this direct voltage of filtering.
8, power supply change-over device as claimed in claim 7 is characterized in that, this voltage stabilizing circuit is high-pressure side voltage stabilizing circuit or low-pressure end voltage stabilizing circuit altogether altogether.
9, power supply change-over device as claimed in claim 1 is characterized in that, this low-voltage collecting unit includes:
One voltage level initialization circuit uses a critical voltage and this AC power to compare, in order to export a control signal; And
One energy storage control circuit is connected in this voltage level initialization circuit and this energy-storage units, is controlled by this control signal, in order to allow the low-voltage part electrical power storage of this AC power in this energy-storage units.
10, power supply change-over device as claimed in claim 9 is characterized in that, when this AC power subcritical voltage, this control signal is a high levle, and when this AC power was higher than critical voltage, this control signal was a low level.
11, power supply change-over device as claimed in claim 9, it is characterized in that, this voltage level initialization circuit connects a Zener diode, at least one resistance and a rectifier diode by an accurate selector switch and forms, according to the comparative result of this critical voltage and this AC power, in order to determine the voltage quasi position of this control signal.
12, power supply change-over device as claimed in claim 11 is characterized in that, this accurate selector switch is a programmable list junction transistor.
13, power supply change-over device as claimed in claim 11 is characterized in that, this accurate selector switch is a two-carrier junction transistor.
14, power supply change-over device as claimed in claim 9, it is characterized in that, this current potential energy storage control circuit connects a resistance by a switch element and a rectifier diode is formed, when this control signal is a high levle, this switch element conducting, this AC power is charged to this energy-storage units, when this control signal is a low level, this switch element ends, and this energy-storage units stops charging.
15, power supply change-over device as claimed in claim 14 is characterized in that, this switch element is a metal oxide semiconductcor field effect transistor.
16, power supply change-over device as claimed in claim 14 is characterized in that, this switch element is a two-carrier junction transistor.
17, power supply change-over device as claimed in claim 14 is characterized in that, this switch element is an isolated gate two-carrier transistor.
18, a kind of power conversion method is converted into a direct current voltage with an AC power, it is characterized in that step includes:
Gather the low-voltage part electric energy of this AC power;
Store the low-voltage part electric energy of this AC power; And
According to the low-voltage part electric energy of this AC power, in order to produce this direct voltage.
19, power conversion method as claimed in claim 18, it is characterized in that, after storing the low-voltage part electric energy step of this AC power, this further includes a voltage stabilizing step, this voltage stabilizing step is carried out voltage stabilizing with the low-voltage part electric energy that this has stored, in order to this direct voltage of the no ripple of output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100775913A CN100527584C (en) | 2005-06-17 | 2005-06-17 | Power supply conversion device and method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100775913A CN100527584C (en) | 2005-06-17 | 2005-06-17 | Power supply conversion device and method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1881768A true CN1881768A (en) | 2006-12-20 |
| CN100527584C CN100527584C (en) | 2009-08-12 |
Family
ID=37519810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100775913A Expired - Fee Related CN100527584C (en) | 2005-06-17 | 2005-06-17 | Power supply conversion device and method therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100527584C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105659486A (en) * | 2013-08-22 | 2016-06-08 | 亚德诺半导体集团 | Power conversion apparatus |
-
2005
- 2005-06-17 CN CNB2005100775913A patent/CN100527584C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105659486A (en) * | 2013-08-22 | 2016-06-08 | 亚德诺半导体集团 | Power conversion apparatus |
| CN105659486B (en) * | 2013-08-22 | 2019-05-31 | 亚德诺半导体集团 | Power converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100527584C (en) | 2009-08-12 |
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