CN104980052A - Variable frequency electroless constant current drive power supply - Google Patents
Variable frequency electroless constant current drive power supply Download PDFInfo
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- CN104980052A CN104980052A CN201510433050.3A CN201510433050A CN104980052A CN 104980052 A CN104980052 A CN 104980052A CN 201510433050 A CN201510433050 A CN 201510433050A CN 104980052 A CN104980052 A CN 104980052A
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- 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
Abstract
The invention provides a variable frequency electroless constant current drive power supply. The structure of the variable frequency electroless constant current drive power supply is that a wiring terminal N and a wiring terminal L which are connected to the mains supply are orderly connected to an AC power supply filter circuit and a full bridge rectifier circuit, the output end of the full bridge rectifier circuit is orderly connected to an PFC power factor correction circuit, a variable frequency power conversion circuit and a rectifier and filter circuit. The invention provides a power supply, as long as power is matched, through adjusting upper limit voltage and working current, power can be supplied to any load with the need of constant current control, the wide power supply range working is realized, at the same time the working efficiency of the power supply is improved, the power supply temperature rise is reduced, the product performance is raised, the service life of the drive power supply is prolonged, and the technical problems of narrow use range, large temperature rise and short service life of the drive power supply in the prior art are solved.
Description
Technical field
The invention relates to a kind of driving power, and especially a kind of frequency conversion is without electrolysis constant-current driving power supply.
Background technology
Current power supply is owing to being subject to power, and the restriction of drive current specification, range of application is very narrow, and model coupling is difficult to, and usual a kind of power supply can only mate a kind of specific equipment.For adapting to user's requirement, must produce various in style, the power supply that model is various, while causing market confusion, product situation out of stock, also increasing production cost.And it is comparatively large to heat up during existing driving power use, useful life is shorter, can not meet customer demand now.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of frequency conversion without electrolysis constant-current driving power supply, this power acquisition PFC circuit of power factor correction, improve method for designing and soft-sphere model technology, converter technique, differential mode common mode filtering circuit, the pressure limiting constant-current control circuit of operating frequency, adopt CBB electric capacity to replace the measures such as electrochemical capacitor, solve the technical problem that the driving power scope of application existed in prior art is narrow, power supply heats up greatly, the life-span is short.
To achieve these goals, the technical solution used in the present invention is: frequency conversion is without electrolysis constant-current driving power supply, it is characterized in that: connect on the binding post N of civil power and binding post L and be connected with AC power filter circuit and full bridge rectifier in turn, the output of full bridge rectifier is connected with in turn PFC circuit of power factor correction, half-bridge soft-sphere model frequency-converter power translation circuit and current rectifying and wave filtering circuit;
Include the power management chip be connected with full bridge rectifier in described PFC circuit of power factor correction, the cathode output end of full bridge rectifier is also connected with in turn energy storage inductor L2 and high-voltage filtering capacitor C4;
Include VMOS pipe in described half-bridge soft-sphere model frequency-converter power translation circuit, its drain electrode is connected on high-voltage filtering capacitor C4, and its grid is connected on the control output pin of power management chip;
Be connected with power transformer and filtering pressure limiting constant-current control circuit in described current rectifying and wave filtering circuit in turn, power transformer input is connected on the output of half-bridge soft-sphere model frequency-converter power translation circuit;
In described AC power filter circuit, binding post L is connected to the input of filter inductance L1 by protective tube F1, binding post N is connected to another input of filter inductance L1 by thermistor R12, the input of filter inductance L1 is parallel with piezo-resistance RZ1 and safety electric capacity CX1, the output of filter inductance L1 is parallel with safety electric capacity CX2.
The input of described full bridge rectifier is connected on the output of filter inductance L1, and the cathode output end of full bridge rectifier and cathode output end are parallel with filter capacitor C1.
Energy storage inductor L2 is connected on the cathode output end of full bridge rectifier, the other end of energy storage inductor L2 is connected on boosting isolating diode D2, the negative pole of boosting isolating diode D2 is connected to high-voltage filtering capacitor C4, VMOS pipe is Q2 and Q3 of two composition half-bridge driven electric currents, wherein the drain electrode of Q2 pipe connects the high-pressure side of high-voltage filtering capacitor C4, the grid of Q2 and Q3 is connected on two output pins of power management chip respectively, high-voltage filtering capacitor C4 is also parallel with resistance R8 and R9 be connected in series, the tie point of R8 and R9 is connected on the feedback input end of power management chip.
Described power management chip is also connected with the harmonic wave electric capacity C3 of other end ground connection.
The grid of energy storage driving tube Q1 is connected on the signal output part of power management chip, and its drain electrode is connected to energy storage inductor L2 with on two contacts of boosting isolating diode D2, and its source electrode is connected in the negative output level of full bridge rectifier.
Common mode inductance L4 and current constant control chip is provided with in described filtering pressure limiting constant-current control circuit.
The beneficial effect of the invention is: the invention adopts said structure and method, adopt PFC circuit of power factor correction, improve the method for designing of operating frequency, soft-sphere model technology, converter technique, differential mode common mode filtering circuit, pressure limiting constant-current control circuit, the measures such as electrochemical capacitor are replaced with CBB electric capacity, as long as provide one power match, adjustment upper voltage limit and operating current can need the load of current constant control to carry out the power supply of powering with any, achieve the work of wide power scope, improve the operating efficiency of power supply simultaneously, reduce power supply to heat up, improve the new energy of product, extend the useful life of this driving power, solve the driving power scope of application existed in prior art narrow, power supply heats up large, the technical problem that life-span is short.
Accompanying drawing explanation
Fig. 1: be the electrical structure block diagram of the invention.
Fig. 2: be the circuit diagram of the invention.
Embodiment
Frequency conversion is as shown in Figure 1-2 without electrolysis constant-current driving power supply, it is characterized in that: connect on the binding post N of civil power and binding post L and be connected with AC power filter circuit 1 and full bridge rectifier 2 in turn, the output of full bridge rectifier 2 is connected with in turn PFC circuit of power factor correction 5, half-bridge soft-sphere model frequency-converter power translation circuit 6 and current rectifying and wave filtering circuit 7.Include the power management chip 3 be connected with full bridge rectifier 2 in described PFC circuit of power factor correction 5, the cathode output end of full bridge rectifier 2 is also connected with energy storage inductor L2 and high-voltage filtering capacitor C4 in turn.Include VMOS pipe in described half-bridge soft-sphere model frequency-converter power translation circuit 6, its drain electrode is connected on high-voltage filtering capacitor C4, and its grid is connected on the control output pin of power management chip 3.Be connected with power transformer 12 and filtering pressure limiting constant-current control circuit 4 in described current rectifying and wave filtering circuit 7 in turn, power transformer 12 input is connected on the output of half-bridge soft-sphere model frequency-converter power translation circuit 6.In AC power filter circuit 1, binding post L is connected to the input of filter inductance L1 by protective tube F1, binding post N is connected to another input of filter inductance L1 by thermistor R12, the input of filter inductance L1 is parallel with piezo-resistance RZ1 and safety electric capacity CX1, the output of filter inductance L1 is parallel with safety electric capacity CX2.The input of described full bridge rectifier 2 is connected on the output of filter inductance L1, the cathode output end of full bridge rectifier 2 and cathode output end are parallel with filter capacitor C1, energy storage inductor L2 is connected on the cathode output end of full bridge rectifier 2, the other end of energy storage inductor L2 is connected on boosting isolating diode D2, the negative pole of boosting isolating diode D2 is connected to high-voltage filtering capacitor C4, VMOS pipe 9 is Q2 and Q3 of two composition half-bridge driven electric currents, wherein the drain electrode of Q2 pipe connects the high-pressure side of high-voltage filtering capacitor C4, the grid of Q2 and Q3 is connected on two output pins of power management chip 3 respectively, high-voltage filtering capacitor C4 is also parallel with resistance R8 and R9 be connected in series, the tie point of R8 and R9 is connected on the feedback input end of power management chip 3.Power management chip 3 is also connected with the harmonic wave electric capacity C3 of other end ground connection.The grid of energy storage driving tube Q1 is connected on the signal output part of power management chip 3, and its drain electrode is connected to energy storage inductor L2 with on two contacts of boosting isolating diode D2, and its source electrode is connected in the negative output level of full bridge rectifier 2.Common mode inductance L4 and current constant control chip 11 is provided with in filtering pressure limiting constant-current control circuit 4.
The invention mainly comprises AC power filter circuit 1; Full bridge rectifier 2; The PFC circuit of power factor correction 5 be made up of the main parts size such as power management chip 3, VMOS pipe Q1, energy storage inductor L2, boosting isolating diode D2, filter capacitor C4, resistance R8, R9, R10; The half-bridge soft-sphere model frequency-converter power translation circuit 6 be made up of power management chip 3, VMOS pipe 9, power transformer 12, electric capacity C5, C6 etc.; The current rectifying and wave filtering circuit 7 be made up of power transformer 12, rectifier diode D4, filtering pressure limiting constant-current control circuit 4 etc.; Constant flow sample resistance R16, voltage limiting resistance R24, Voltage Cortrol potentiometer RP2, electric current adjustment potentiometer RP1 etc. is also provided with in circuit.
Civil power is connected on binding post L and N, and binding post L is connected to the input of filter inductance L1 by protective tube F1, binding post N is connected to another input of filter inductance L1 by thermistor R12, the input of filter inductance L1 is also connected to piezo-resistance RZ1 and safety electric capacity CX1, the output of filter inductance L1 is also connected to safety electric capacity CX2 and electric capacity CY1, CY2, and the tie point of CY1, CY2 connects outer casing of power supply, the output of filter inductance L1 is connected to the input side 1 of full bridge rectifier 2 again, 2, the DC output side 3 of full bridge rectifier (2) BD1, 4 and be connected to filter capacitor C1, then contact 4 is connected to one end of energy storage inductor L2, the other end of energy storage inductor L2 is connected to boosting isolating diode D2, the negative pole of boosting isolating diode D2 is connected to high-voltage filtering capacitor C4, C5 and C6, and sampling resistor R8, R9, load resistance R10, VMOS pipe 9 forms half-bridge driven electric current by Q2 and Q3, wherein the drain electrode of Q2 pipe connects the high-pressure side of filter capacitor C4, Q2, the grid of Q3 pipe is connected to the signal output part 8 and 6 of power management chip 3 respectively, the tie point of sampling resistor R8 and R9 is connected to the feedback end input 9 of power management chip 3, completes the effect of stable high voltage.The tie point of R2 and R3 is connected to 1 end of power management chip 3, completes the sampling of rectifier output voltage; The output negative terminal 3 of full bridge rectifier 2 is connected to 2 ends of power management chip 3, completes the sampling of electric current; 2 ends of full bridge rectifier 2 are again through sampling resistor R1 ground connection.3 ends of the one termination power management chip 3 of resonant capacitance C3, other end ground connection, for power management chip 3 provides frequency setting signal.Energy storage inductor L2 and boosting isolating diode D2 tie point is connected to the drain electrode of energy storage driving tube Q1, the source electrode of energy storage driving tube Q1 is connected with the negative pole 3 that full bridge rectifier 2 exports.The signal output part 7 of power management chip 3 is connected to the grid of energy storage driving tube Q1, completes power factor correction; Two joints of the armature winding L-2 of power transformer 12 are connected on the tie point of contact that Q2, Q3 be in series and electric capacity C5 and C6 respectively.Power supply winding L-1 one end ground connection of power transformer 12, the other end is connected to 10 ends of power management chip 3 through diode D3, the cathode output end 4 of full bridge rectifier 2 is connected to again through resistance R4,10 ends of power management chip 3 are through electric capacity C2 ground connection, realize the power supply to power management chip IC1, wherein resistance R4 is starting resistance; Between the negative pole that electric capacity C4, resistance 10 are connected to boosting isolating diode D2 and ground connection, complete hv filtering and dummy load function.The secondary L-3 of power transformer 12 is connected to double diode D4 and completes full-wave rectification, and load resistance R15 is connected to the positive and negative two ends after rectification, is dummy load.
Electric capacity C7 is connected to the two ends of load resistance R15, one end of differential mode inductance L3 is connected to the cathode output end of rectifier diode D4, electric capacity 8 is connected to the other end of differential mode inductance L3 and output negative pole meets common mode inductance L4, at the output two termination capacitor C9 of common mode inductance L4, its negative pole end is through current sampling resistor R16 output negative pole, the positive terminal output cathode of electric capacity, completes output driving current sampling.
The secondary L-4 of power transformer 12 meets rectifier diode D5 and resistance R17, and the positive and negative polarities after rectification meet voltage stabilizing didoe VR1 and electric capacity C10, and L-3 and the L-4 winding of power transformer 12 through common mode inductance L4 negative pole altogether.Diode D5 is connected to 8 pin of current constant control chip 11 through resistance R17, powers to current constant control chip 11.
The output negative pole that 4 ends of current constant control chip 11 are connected to this power supply through resistance R23, realizes current constant control.Electric current adjustment potentiometer RP1 is connected to 5,6 two ends of current constant control chip 11, can control the constant current value of this power supply.Voltage limiting resistance R24 connects output cathode and the output negative pole of this power supply after connecting with Voltage Cortrol potentiometer RP2, its intermediate connection point is connected to 7 ends of current constant control chip 11, and the direct current that Voltage Cortrol potentiometer RP2 can control this power supply exports upper voltage limit.3 pin of current constant control chip 11 connect common ground negative pole; Resistance R21, R22, Voltage Cortrol potentiometer RP2 are connected to 8 pin and the negative pole altogether of current constant control chip 11 after connecting, its tie point is connected on 5,6 ends of current constant control chip 11 respectively, there is provided setting with reference to threshold voltage, to control upper voltage limit and the operating current of this power supply to current constant control chip 11.
Voltage limiting resistance R24 is connected on the output both positive and negative polarity of this power supply after connecting with Voltage Cortrol potentiometer RP2, and tie point is connected to 7 pin of current constant control chip 11, and regulation voltage adjustment potentiometer RP2 can set the upper voltage limit of this power supply.
1,2 terminations of current constant control chip 11 have diode D6, D7, and two manage and are connected to the diode cathode in optocoupler U1 after connecing, and its positive pole is connected on the positive terminal of electric capacity C10.The triode side of optocoupler U1 is connected on 4 ends and 5 ends of current constant control chip 11 respectively, completes frequency conversion pressure limiting current constant control.
In the present invention, the output of filter inductance L1 is connected to the input side 1,2 of full bridge rectifier 2, and the DC output side 3,4 of full bridge rectifier 2 is also connected to filter capacitor C1, completes hv filtering.
The contact 4 of full bridge rectifier 2 is connected to one end of energy storage inductor L2, the other end of energy storage inductor L2 is connected to boosting isolating diode D2.Energy storage inductor L2 and boosting isolating diode D2 tie point is connected to the drain electrode of energy storage driving tube Q1, the source electrode of energy storage driving tube Q1 is connected with the negative pole 3 that full bridge rectifier 2 exports.The signal output part 7 of power management chip 3 is connected to the grid of energy storage driving tube Q1, completes power factor correction.
The negative pole of boosting isolating diode D2 is connected to through electric capacity C5 and C6 ground connection, and simultaneously also through sampling resistor R8, R9 ground connection, the tie point of R8, R9 is connected to 9 ends of power management chip 3, completes the effect of stable high voltage.Between the negative pole that high-voltage filtering capacitor C4, resistance 10 are connected to boosting isolating diode D2 and ground connection, complete hv filtering and dummy load function.
The half-bridge driven that VMOS pipe Q2 and VMOS pipe Q3 forms, the drain electrode of Q2 pipe is connected to energy storage inductor L2 in the tie point of boosting isolating diode D2.The grid of Q2, Q3 pipe is connected to the signal output part 8 and 6 of power management chip IC1 respectively, realizes Sofe Switch frequency conversion drive.
The tie point of resistance R2 and R3 is connected to 1 end of power management chip 3, completes the sampling of rectifier output voltage; The output negative terminal 3 of full bridge rectifier 2 is connected to 2 ends of power management chip 3, completes the sampling of electric current; 2 ends of power management chip 3 are again through sampling resistor R1 ground connection.3 ends of resonant capacitance C3 mono-termination power management chip 3, other end ground connection, for power management chip 3 provides frequency setting signal.
Two joints of the armature winding of power transformer 12 are connected on the tie point of contact that VMOS pipe Q2, Q3 be in series and electric capacity C5 and C6 respectively, complete voltage transformation.Power supply winding one end ground connection of high frequency transformer 12, the other end is connected to 10 ends of power management chip 3 through diode D3, then is connected to the cathode output end 4 of full bridge rectifier 2 through resistance R4, then through electric capacity C2 ground connection, realize the power supply to power management chip 3, wherein resistance R4 is starting resistance.
Electric capacity C7 is connected to the two ends of load resistance R15, and an end of differential mode inductance L3 is connected to the cathode output end of rectifier diode D4.Electric capacity 8 is connected to the other end of differential mode inductance L3 and output negative pole meets common mode inductance L4, and at the output two termination capacitor C9 of common mode inductance L4, its negative pole end is through current sampling resistor R16 output negative pole, and the positive terminal output cathode of electric capacity, completes output driving current sampling.
The output negative pole that 4 ends of current constant control chip 11 are connected to this power supply through resistance R23, realizes current constant control.Current adjustment potentiometer RP1 is connected to 5,6 two ends of Current limited Control chip 11, can control the constant current value of this power supply.Voltage limiting resistance R24 connects output cathode and the output negative pole of this power supply after connecting with Voltage Cortrol potentiometer RP2, its intermediate connection point is connected to 7 ends of current constant control chip 11, and the direct current that pressure adjustment potentiometer RP2 can control this power supply exports upper voltage limit.
3 pin of current constant control chip 11 connect common ground negative pole; 8 pin and the negative pole altogether of current constant control chip 11 is connected to after resistance R21, R22, pressure adjustment potentiometer RP2 series connection, its tie point is connected on 5,6 ends of current constant control chip 11 respectively, there is provided setting with reference to threshold voltage, to control upper voltage limit and the operating current of this power supply to current constant control chip 11.Voltage limiting resistance R24 adjusts after potentiometer RP2 connects with pressure and is connected on the output both positive and negative polarity of this power supply, and tie point is connected to 7 pin of current constant control chip 11, regulates pressure adjustment potentiometer RP2 can set the upper voltage limit of this power supply.
1,2 terminations of current constant control chip 11 have diode D6, D7, and two manage and are connected to the diode cathode in optocoupler U1 after connecing, and its positive pole is connected on the positive terminal of electric capacity C10.The triode side of optocoupler U1 is connected on 4 ends and 5 ends of chip 11 respectively, completes frequency conversion pressure limiting current constant control.
Regulate upper voltage limit and the operating current of this driving power of setting, realize power supply and coordinate with the intact of load, and then difficult problem is mated in solution load with power supply, expand the accommodation of this driving power.
Claims (7)
1. frequency conversion is without electrolysis constant-current driving power supply, it is characterized in that: connect on the binding post N of civil power and binding post L and be connected with AC power filter circuit (1) and full bridge rectifier (2) in turn, the output of full bridge rectifier (2) is connected with in turn PFC circuit of power factor correction (5), half-bridge soft-sphere model frequency-converter power translation circuit (6) and current rectifying and wave filtering circuit (7);
Include the power management chip (3) be connected with full bridge rectifier (2) in described PFC circuit of power factor correction (5), the cathode output end of full bridge rectifier (2) is also connected with energy storage inductor L2 and high-voltage filtering capacitor C4 in turn;
Include VMOS pipe in described half-bridge soft-sphere model frequency-converter power translation circuit (6), its drain electrode is connected on high-voltage filtering capacitor C4, and its grid is connected on the control output pin of power management chip (3);
Be connected with power transformer (12) and filtering pressure limiting constant-current control circuit (4) in described current rectifying and wave filtering circuit (7) in turn, power transformer (12) input is connected on the output of half-bridge soft-sphere model frequency-converter power translation circuit (6).
2. frequency conversion according to claim 1 is without electrolysis constant-current driving power supply, it is characterized in that: in AC power filter circuit (1), binding post L is connected to the input of filter inductance L1 by protective tube F1, binding post N is connected to another input of filter inductance L1 by thermistor R12, the input of filter inductance L1 is parallel with piezo-resistance RZ1 and safety electric capacity CX1, the output of filter inductance L1 is parallel with safety electric capacity CX2.
3. frequency conversion according to claim 1 is without electrolysis constant-current driving power supply, it is characterized in that: the input of described full bridge rectifier (2) is connected on the output of filter inductance L1, and the cathode output end of full bridge rectifier (2) and cathode output end are parallel with filter capacitor C1.
4. frequency conversion according to claim 1 is without electrolysis constant-current driving power supply, it is characterized in that: energy storage inductor L2 is connected on the cathode output end of full bridge rectifier (2), the other end of energy storage inductor L2 is connected on boosting isolating diode D2, the negative pole of boosting isolating diode D2 is connected to high-voltage filtering capacitor C4, VMOS pipe (9) is Q2 and Q3 of two composition half-bridge driven electric currents, wherein the drain electrode of Q2 pipe connects the high-pressure side of high-voltage filtering capacitor C4, the grid of Q2 and Q3 is connected on two output pins of power management chip (3) respectively, high-voltage filtering capacitor C4 is also parallel with resistance R8 and R9 be connected in series, the tie point of R8 and R9 is connected on the feedback input end of power management chip (3).
5. frequency conversion according to claim 4 is without electrolysis constant-current driving power supply, it is characterized in that: the harmonic wave electric capacity C3 described power management chip (3) being also connected with other end ground connection.
6. frequency conversion according to claim 4 is without electrolysis constant-current driving power supply, it is characterized in that: the grid of energy storage driving tube Q1 is connected on the signal output part of power management chip (3), its drain electrode is connected to energy storage inductor L2 with on two contacts of boosting isolating diode D2, and its source electrode is connected in the negative output level of full bridge rectifier (2).
7. frequency conversion according to claim 1 is without electrolysis constant-current driving power supply, it is characterized in that: be provided with common mode inductance L4 and current constant control chip (11) in described filtering pressure limiting constant-current control circuit (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510433050.3A CN104980052A (en) | 2015-07-22 | 2015-07-22 | Variable frequency electroless constant current drive power supply |
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| CN201510433050.3A CN104980052A (en) | 2015-07-22 | 2015-07-22 | Variable frequency electroless constant current drive power supply |
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| CN201510433050.3A Pending CN104980052A (en) | 2015-07-22 | 2015-07-22 | Variable frequency electroless constant current drive power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105744436A (en) * | 2016-05-06 | 2016-07-06 | 梁镇杰 | Novel sound box |
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| US20110291574A1 (en) * | 2010-05-25 | 2011-12-01 | Shu Ji | Multi-channel constant current source and illumination source |
| CN102202447A (en) * | 2011-04-22 | 2011-09-28 | 威海东兴电子有限公司 | Heat-resistant and lightning proof LED driving power supply without electrolytic capacitor |
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Application publication date: 20151014 |