CN106411157A - Power supply suitable for electronic information system - Google Patents

Power supply suitable for electronic information system Download PDF

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Publication number
CN106411157A
CN106411157A CN201611017919.7A CN201611017919A CN106411157A CN 106411157 A CN106411157 A CN 106411157A CN 201611017919 A CN201611017919 A CN 201611017919A CN 106411157 A CN106411157 A CN 106411157A
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CN
China
Prior art keywords
module
pfc
current
voltage
controller
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.)
Withdrawn
Application number
CN201611017919.7A
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Chinese (zh)
Inventor
周源思
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Guangxi University
Original Assignee
Guangxi University
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Filing date
Publication date
Application filed by Guangxi University filed Critical Guangxi University
Priority to CN201611017919.7A priority Critical patent/CN106411157A/en
Publication of CN106411157A publication Critical patent/CN106411157A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The invention discloses a power supply suitable for an electronic information system. The power supply comprises a controller, a comparator, a touch screen module, an overvoltage protection module, a PFC controller module, a boost circuit and a rectifying circuit, wherein the controller is connected with an overcurrent protection driving module, the touch screen module, the overvoltage protection module, the comparator and a voltage-current sampling module; the comparator is further connected with a current-voltage sampling module; the current-voltage sampling module is further connected with an isolating transformer, the rectifying circuit and the other end of the overvoltage protection module; and the isolating transformer is further connected with an auto-transformer. The power supply suitable for the electronic information system adopts a phase difference measuring method, that is, voltage and current signals detected by a secondary side of the isolating transformer are shaped by the comparator, then a phase difference of voltage and current is obtained through calculation and the phase difference is input to the controller for cosine operation, thereby a power factor of the system can be obtained, and the power supply can achieve high precision through phase measurement by adopting an equal precision method, and the system is simple in structure, small in size and low in cost.

Description

A kind of power supply being applied to electronic information
Technical field
The present invention relates to a kind of electronic information, specifically a kind of power supply being applied to electronic information.
Background technology
Development with electron electric power technology is it is desirable to the power supply of electronic devices and components is more and more harsher.General components and parts Power supply is all directly to obtain from civil power, but because the input impedance of electrical network is in capacitive, and a large amount of rectification circuit causes electrical network net There is larger phase contrast, input current is in pulse type, harmonic component is very high, severe jamming electricity between side input voltage and input current Force system.It is reported that general electrical network net side power factor is about 0.65 at this stage, therefore, high efficiency utilizes the energy, improves power supply Power factor is very urgent.
PFC PFC (Power Factor Correction) is divided into active and two kinds of passive type at this stage. Passive PFC structure is simple, mainly use the voltage that the principle that inductance coil internal current can not be mutated adjusts in circuit with Current and phase difference, thus changing power factor, but its structure bulky, being also easy to produce low-frequency noise and maximum power factor can only be 70%.Active PFC is generally active power factor adjustment, can simply be summarized as step-up switching power supply circuit, have volume Little, input voltage width and power factor high the advantages of, power factor approach 100%.Existing much carry active PFC Power supply architecture excessively complicated, lead to power volume larger, high cost, affect application and popularization.
Content of the invention
It is an object of the invention to provide a kind of power supply being applied to electronic information using active PFC, to solve The problem certainly proposing in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme：
A kind of power supply being applied to electronic information, including controller, comparator, touch screen module, overvoltage protective module, Pfc controller module, booster circuit and rectification circuit, described controller connects overcurrent protection drive module, touch screen mould respectively Block, overvoltage protective module, comparator, booster circuit and voltage x current sampling module, comparator is also connected with current-voltage sampling mould Block, current-voltage sampling module is also respectively connected with isolating transformer, rectification circuit and the overvoltage protective module other end, described isolation Transformator is also connected with autotransformer, and autotransformer is also connected with exchanging AC, and described booster circuit is also respectively connected with voltage x current Sampling module and PFC control circuit, voltage x current sampling module is also respectively connected with the PFC control module other end and load；Described PFC control module includes pfc controller, resistance R0, resistance R1, electric capacity C1, inductance L, diode D1 and rectifier bridge Q, described whole Stream two AC input ends of bridge Q connect alternating current 220V two ends respectively, and the cathode output end V+ of rectifier bridge Q connects electric capacity C1, electricity respectively Sense L and pfc controller input voltage sampling end, the inductance L other end connect respectively diode D2 positive pole, diode D1 positive pole and PFC power tube VT pin 1, PFC power tube VT pin 2 connects resistance R0, electric capacity C2 and resistance R2 respectively and is grounded, and resistance R0 is another One end connects the current sample end of the electric capacity C1 other end, rectifier bridge Q output V- and pfc controller, described diode D2 respectively Negative pole connects ground connection diode D3 negative pole, and described diode D1 negative pole connects the electric capacity C2 other end, resistance R1 and outfan respectively Vo, the resistance R1 other end connects the output voltage sampling end of the resistance R2 other end and pfc controller respectively, the opening of pfc controller Close control end and connect PFC power tube VT pin 3.
As the further scheme of the present invention：Described controller adopts MSP430F449.
As the further scheme of the present invention：Described comparator adopts two-way comparator LM393.
As the present invention further scheme：Described PFC control module adopts UCC28019.
Compared with prior art, the invention has the beneficial effects as follows：Present system adopts phase difference measurement method, that is, right respectively The voltage of isolating transformer secondary detection, current signal first through comparator shaping, then by being calculated the phase of voltage x current Potential difference, is re-fed into controller and carries out cos operation, you can obtain the power factor of system, surveys phase by equally accurate method, can reach Very high accuracy, so as to meet system requirements very well, system structure is simple, small volume, low cost.
Brief description
Fig. 1 is the circuit structure schematic diagram of the power supply being applied to electronic information；
Fig. 2 is the circuit diagram of PFC control module be applied to the power supply of electronic information.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work Embodiment, broadly falls into the scope of protection of the invention.
Refer to Fig. 1 ~ 2, in the embodiment of the present invention, a kind of power supply being applied to electronic information, including controller, ratio Compared with device, touch screen module, overvoltage protective module, pfc controller module, booster circuit and rectification circuit, described controller is respectively Connect overcurrent protection drive module, touch screen module, overvoltage protective module, comparator, booster circuit and voltage x current sampling mould Block, comparator is also connected with current-voltage sampling module, and current-voltage sampling module is also respectively connected with isolating transformer, rectification circuit With the overvoltage protective module other end, described isolating transformer is also connected with autotransformer, and autotransformer is also connected with exchanging AC, institute State booster circuit and be also respectively connected with voltage x current sampling module and PFC control circuit, voltage x current sampling module is also respectively connected with The PFC control module other end and load；Described PFC control module includes pfc controller, resistance R0, resistance R1, electric capacity C1, electricity Sense L, diode D1 and rectifier bridge Q, described two AC input ends of rectifier bridge Q connect alternating current 220V two ends respectively, and rectifier bridge Q is just Pole outfan V+ connects the input voltage sampling end of electric capacity C1, inductance L and pfc controller respectively, and the inductance L other end connects respectively Diode D2 positive pole, diode D1 positive pole and PFC power tube VT pin 1, PFC power tube VT pin 2 connects resistance R0, electricity respectively Hold C2 and resistance R2 and be grounded, the resistance R0 other end connects the electric capacity C1 other end respectively, rectifier bridge Q output V- and PFC controls The current sample end of device, described diode D2 negative pole connects ground connection diode D3 negative pole, and described diode D1 negative pole connects respectively The electric capacity C2 other end, resistance R1 and output end vo, the resistance R1 other end connects the defeated of the resistance R2 other end and pfc controller respectively Go out voltage sample end, the switch control terminal of pfc controller connects PFC power tube VT pin 3；Described controller adopts MSP430F449；Described comparator adopts two-way comparator LM393；Described PFC control module adopts UCC28019.
The operation principle of the present invention is：It is to control and arithmetic core using MSP430F449, phase method is surveyed by equally accurate and surveys Measure the power factor of system, PFC control module, then with UCC28019 as core, forms closed loop feedback electricity using hardware circuit Road, real-time monitoring output voltage, electric current, MSP430F449 provides the relay of signal driving overcurrent protection drive module and adopts Sample and display voltage x current, select various functions using touch screen, and touch screen shows each peration data, man machine interface friend in real time Good.
By controller real-time sampling output current, the continuing of Single-chip Controlling overcurrent protection drive module when current is excessive Electrical equipment makes it disconnect, system cut-off；When after failture evacuation, detected current value is less than predetermined value, controller sends instructions again and makes to continue Electrical equipment closes, circuit normal work again.
System adopts phase difference measurement method, that is, respectively to the voltage of isolating transformer secondary detection, current signal first through than Compared with device shaping, then by being calculated the phase contrast of voltage x current, it is re-fed into controller and carries out cos operation, you can be The power factor of system.Phase is surveyed by equally accurate method, can reach very high accuracy, so as to meet system requirements very well.
Realize final PFC from CCM mode PFC controller UCC28019, this device adopts soft start machine System, dynamic response is good, can achieve input undervoltage protection in conjunction with peripheral circuit, and open loop is protected, output over-voltage protection, soft excessively stream control The function such as system (SOC) and peak point current restriction.
Refer to Fig. 2, described PFC control module include pfc controller, resistance R0, resistance R1, electric capacity C1, inductance L, two Pole pipe D1 and rectifier bridge Q, described two AC input ends of rectifier bridge Q connect alternating current 220V two ends, the positive pole output of rectifier bridge Q respectively End V+ connects the input voltage sampling end of electric capacity C1, inductance L and pfc controller respectively, and the inductance L other end connects diode respectively D2 positive pole, diode D1 positive pole and PFC power tube VT pin 1, PFC power tube VT pin 2 connect respectively resistance R0, electric capacity C2 and Resistance R2 is simultaneously grounded, and the resistance R0 other end connects the electricity of the electric capacity C1 other end, rectifier bridge Q output V- and pfc controller respectively Stream sampling end, described diode D2 negative pole connects ground connection diode D3 negative pole, and described diode D1 negative pole connects electric capacity C2 respectively The other end, resistance R1 and output end vo, the resistance R1 other end connects the output voltage of the resistance R2 other end and pfc controller respectively Sampling end, the switch control terminal of pfc controller connects PFC power tube VT pin 3；L is PFC inductance, and D1 is PFC diode, C1 For civil power filter capacitor, VT is PFC power tube, and R0 is mains current sampling resistor, and the mains current of PFC control circuit input is adopted Sample voltage is negative value, and R1, R2 are DC voltage sampling resistor, and PFC control circuit is by mains input voltage, direct current output electricity Pressure and the analysis of circuital current sampled value, output control signal, control the dutycycle of PFC power tube, thus reaching correcting circuit The purpose of PFC.
When VT saturation conduction, be equivalent to and L right-hand member is grounded, larger current iPFC at this moment will be had to flow through L, but due to L's Inductance characteristic, iPFC can only be gradually increased, subsequent VT stopping, and the energy in inductance L maintains iPFC electric current to continue flowing, warp D1 charges to C1, and supply load makes iPFC be gradually reduced, controlled by PFC control circuit, PFC switching tube constantly opens repeatedly, Close, generate output voltage at load two ends.
If PFC switching tube VT ON time is longer, in L, electric current is larger, and in L, the energy of savings is more, then when VT ends When L in the electric current that maintains just larger.If conversely, VT ON time is shorter, the energy of savings just less, the L when VT ends in L The electric current maintaining is also less.It can be seen that controlling the length of VT service time, you can the size of electric current in control circuit, as long as so pressing Rule according to input voltage to control opening and ending so that it may so that input current is good with input voltage of PFC switching tube With frequency homophase, improve the input power factor of circuit.
When VT opens, the polarity of voltage at L two ends is that a left side is just right negative.Now D1 anode is low, is in cut-off state, C2 two The voltage at end will not be through VT bleed off.And when VT ends, L both end voltage polarity inversion, for the left negative right side just, the now sense at L two ends Raw voltage is in series with the output voltage of rectifier bridge Q, by D1, C1 is charged, and the voltage at result C1 two ends is higher than that commutator exports Voltage, therefore this pfc circuit also has boost function.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as limiting involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment only wraps Containing an independent technical scheme, only for clarity, those skilled in the art should for this narrating mode of description Using description as an entirety, the technical scheme in each embodiment can also form those skilled in the art through appropriately combined Understandable other embodiment.

Claims (4)

1. a kind of power supply being applied to electronic information, including controller, comparator, touch screen module, overvoltage protective module, Pfc controller module, booster circuit and rectification circuit drive mould it is characterised in that described controller connects overcurrent protection respectively Block, touch screen module, overvoltage protective module, comparator, booster circuit and voltage x current sampling module, comparator is also connected with electric current Voltage sample module, it is another that current-voltage sampling module is also respectively connected with isolating transformer, rectification circuit and overvoltage protective module End, described isolating transformer is also connected with autotransformer, and autotransformer is also connected with exchanging AC, and described booster circuit also connects respectively Connect voltage x current sampling module and PFC control circuit, voltage x current sampling module be also respectively connected with the PFC control module other end and Load；Described PFC control module includes pfc controller, resistance R0, resistance R1, electric capacity C1, inductance L, diode D1 and rectifier bridge Q, described two AC input ends of rectifier bridge Q connect alternating current 220V two ends respectively, and the cathode output end V+ of rectifier bridge Q connects electricity respectively Hold the input voltage sampling end of C1, inductance L and pfc controller, the inductance L other end connects diode D2 positive pole, diode respectively D1 positive pole and PFC power tube VT pin 1, PFC power tube VT pin 2 connects resistance R0, electric capacity C2 and resistance R2 respectively and is grounded, The resistance R0 other end connects the current sample end of the electric capacity C1 other end, rectifier bridge Q output V- and pfc controller respectively, described Diode D2 negative pole connects ground connection diode D3 negative pole, and described diode D1 negative pole connects the electric capacity C2 other end, resistance R1 respectively And output end vo, the resistance R1 other end connects the output voltage sampling end of the resistance R2 other end and pfc controller respectively, and PFC is controlled The switch control terminal of device processed connects PFC power tube VT pin 3.
2. the power supply being applied to electronic information according to claim 1 is it is characterised in that described controller adopts MSP430F449.
3. the power supply being applied to electronic information according to claim 1 is it is characterised in that described comparator is using double Road comparator LM393.
4. the power supply being applied to electronic information according to claim 1 is it is characterised in that described pfc controller is adopted Use UCC28019.
CN201611017919.7A 2016-11-20 2016-11-20 Power supply suitable for electronic information system Withdrawn CN106411157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611017919.7A CN106411157A (en) 2016-11-20 2016-11-20 Power supply suitable for electronic information system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611017919.7A CN106411157A (en) 2016-11-20 2016-11-20 Power supply suitable for electronic information system

Publications (1)

Publication Number Publication Date
CN106411157A true CN106411157A (en) 2017-02-15

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CN201611017919.7A Withdrawn CN106411157A (en) 2016-11-20 2016-11-20 Power supply suitable for electronic information system

Country Status (1)

Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204334003U (en) * 2014-11-28 2015-05-13 刘尚爱 A kind of intelligent solar charging system
CN204350223U (en) * 2015-01-22 2015-05-20 深圳市佳凯特实业有限公司 A kind of intelligent remote controller of PM value monitoring
CN205141991U (en) * 2015-10-27 2016-04-06 天津凯娜涵科技有限公司 PFC (power factor correction) circuit
CN205335855U (en) * 2015-10-26 2016-06-22 许春蕾 Domestic appliance intelligence electrical power generating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204334003U (en) * 2014-11-28 2015-05-13 刘尚爱 A kind of intelligent solar charging system
CN204350223U (en) * 2015-01-22 2015-05-20 深圳市佳凯特实业有限公司 A kind of intelligent remote controller of PM value monitoring
CN205335855U (en) * 2015-10-26 2016-06-22 许春蕾 Domestic appliance intelligence electrical power generating system
CN205141991U (en) * 2015-10-27 2016-04-06 天津凯娜涵科技有限公司 PFC (power factor correction) circuit

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Application publication date: 20170215