CN105790399B - AC-DC conversion charging circuit - Google Patents
AC-DC conversion charging circuit Download PDFInfo
- Publication number
- CN105790399B CN105790399B CN201610217109.XA CN201610217109A CN105790399B CN 105790399 B CN105790399 B CN 105790399B CN 201610217109 A CN201610217109 A CN 201610217109A CN 105790399 B CN105790399 B CN 105790399B
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- diode
- positive pole
- battery
- 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.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052744 lithium Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000036772 blood pressure Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
-
- 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
-
- H02J2007/10—
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of ac-dc converter circuit with charge function, including：AC to DC converter circuit, DC voltage converting circuit, battery charger, ac-dc converter circuit are used for alternating current 220V voltage conversion into direct current 24V；DC voltage converting circuit is used for direct current 24V voltage conversions into direct current 12V and 3.3V；Battery charger is used to charge the battery, and battery is 24V lithium batteries, under no alternating current 220V power conditions, provides 24V DC voltages to circuit, ensures DC voltage converting circuit normal work.The present invention is improved ac-dc converter circuit, DC voltage converting circuit, battery charger respectively, these three parts can realize free switching, in the case where there is alternating current 220V and in the case of a battery, power supply can provide 24V, 12V and 3.3V stable voltage.
Description
Technical field
The present invention relates to a kind of ac-dc converter circuit, more particularly to a kind of AC-DC conversion electricity with charge function
Road.
Background technology
Ac-dc converter circuit provides input power for direct current motor drive circuit, and existing ac-dc converter circuit is in reality
It is unstable in the continuity of alternating current 220V break-make during use, and when being impacted by load current, it is easy to go out
Existing operation irregularity.It is an advantage of the invention that when there is alternating current 220V voltage, stable output, in no alternating current 220V voltage, lean on
Battery working stability exports, and in addition, the present invention has further the advantage that：
1. when connecting alternating current 220V voltage, stable to export DC voltage 24V, 12V and 3.3V, battery is according to charge condition
Charging.When disconnecting alternating current 220V voltage, battery work, output direct current 24V, 12V and 3.3V can also be stablized.
2. alternating current 220V voltage is civil power, may be unstable, if alternating current 220V civil power is too high, then the 24V of output
Can accordingly it raise, then relay RLY1 will be acted, and the output number of turn is changed, and such voltage just lowers, and ensures output
DC voltage will not be too high.
3. the battery charger mode of hysteresis comparator comparison voltage, judges whether to charge, prevents battery overcharge
Or overdischarge.Reference voltage and comparison voltage in circuit are drawn by divider resistance component voltage.
4. by the diode-isolated battery of two cascades, battery and the isolation of direct current 24V voltages, in order to avoid connection alternating current 220V
When it is mixed with battery, prevent battery current from flowing back.Isolate the design of battery, be in order to avoid power supply direct charging battery.
5. direct current 24V is converted into direct current 12V and direct current 3.3V with lowering and stabilizing blood pressure chip, the operating efficiency of power supply is improved
And stability.
The content of the invention
It is applied to driving direct current generator it is an object of the invention to provide one kind and other control units provides power supply, improves electricity
The stability in use in source.
To realize the purpose of the present invention, it is achieved using following technical scheme：
A kind of AC-DC conversion charging circuit, including AC to DC converter circuit, charging circuit and DC voltage conversion electricity
Road, wherein：
AC to DC converter circuit is used to alternating current being converted to the first predetermined direct current voltage output, the output of the DC voltage
End is connected with the input of charging circuit, is charged for rechargeable battery；
The output end is also connected with the input of DC voltage converting circuit, and the DC voltage converting circuit first makes a reservation for this
DC voltage exports after being converted to the second predetermined direct current voltage and the 3rd predetermined direct current voltage.
Described AC-DC conversion charging circuit, preferably：
The AC to DC converter circuit includes transformer, rectification circuit and anti-overvoltage circuit；
The high voltage side of transformer winding connects 220V AC powers, and low-pressure side winding connects rectification circuit, and rectification circuit is used for
The alternating current of the first predetermined voltage after transformer transformation is converted to the DC voltage of the first predetermined voltage；
Whether the DC voltage that anti-overvoltage circuit is used to detect after changing is higher than the first predetermined voltage, when predetermined higher than first
Voltage, anti-overvoltage circuit change the number of turn of step down side winding, reduce the alternating voltage of low-pressure side.
Described AC-DC conversion charging circuit, preferably：
Rectification circuit is made up of four diodes D3, D4, D5 and D6；Transformer low voltage side winding includes three terminals,
Relay and rectification circuit are connected respectively；
The wherein normally-closed contact of the first terminal contact relay；The normally opened contact of intermediate terminal contact relay；Second terminal connects
It is connected to the positive pole of diode D3 in rectification circuit；Relay switch contacts are connected to diode D4 positive pole；Diode D5 positive poles
Ground connection, negative pole connection diode D3 positive pole；Diode D6 plus earths, negative pole connection diode D4 positive pole；Diode D3
It is connected with diode D4 negative poles, the output end as rectification circuit.
Described AC-DC conversion charging circuit, preferably：
Anti- overvoltage circuit includes：First operational amplifier U1B, positive feedback resistor R7, triode Q3, current-limiting resistance R10,
R11, divider resistance R15, R16, R19, R20, filtering electrochemical capacitor CE1 and CE2, resistance R11 and diode D7；Wherein：
Positive feedback resistor R7 is connected between U1B electrode input end and output end；Output end connects Q3 base stage；
R10 mono- terminates direct voltage output of the magnitude of voltage for the half of the second predetermined direct current voltage, and another termination U1B is just
Pole input；
R19 mono- terminates rectification circuit output end, the other end is connected with R15 and is followed by U1B negative input, and R20 mono- is terminated
Ground, the other end are connected with R16 is followed by U1B negative input；
CE2 positive poles connect U1B negative input, negative pole ground connection；CE1 positive poles connect Q3 base stages, negative pole ground connection；U1B output
Terminate R11, another termination Q3 of R11 ground level；
The magnet coil negative pole of Q3 collector connecting relay, Q3 grounded emitter, the magnet coil positive pole of relay
Connect the output end of rectification circuit；The negative pole of D7 positive pole contact relay magnet coils, negative pole connect the positive pole of magnet coil.
Described AC-DC conversion charging circuit, preferably：
The charging circuit includes charging paths and battery voltage detection circuit, and it is rechargeable battery that the charging paths, which are used for,
Charging, the battery voltage detection circuit is used for the voltage for detecting rechargeable battery, when the voltage of rechargeable battery is less than predetermined voltage
During threshold value, battery voltage detection circuit controls charging paths to be charged for rechargeable battery.
Described AC-DC conversion charging circuit, preferably：
The charging paths include diode D1, D2, D9, D10, D11, resistance R1, R6, triode Q1, rechargeable battery P1；
The output termination D1 of rectification circuit positive pole, D1 negative pole connect D2 positive pole, and D2 negative pole connects Q1 base stage；
D2 negative pole is connected with R3, R3 another termination Q2 colelctor electrode, and R1 mono- terminates the output end of rectification circuit, another
Q1 colelctor electrode is terminated, Q1 emitter stage meets R6, another termination D10 of R6 positive pole, and D10 negative pole is meeting rechargeable battery P1 just
Pole, the output termination D9 of rectification circuit positive pole, negative pole that D9 negative pole is the first predetermined direct current voltage leading-out ends VCC, D9 and
D11 negative pole is connected, and D11 positive pole is connected with P1 positive pole, P1 negative pole ground connection；
The battery voltage detection circuit includes：Second operational amplifier U1A, filter capacitor C1, divider resistance R2, R4,
R9, R14, R12, R13, R17, R18, positive feedback resistor R5, resistance R8, R3, diode D8, triode Q2；Wherein：
U1A earth terminals are grounded, and control source terminates the second predetermined direct current voltage input end；
C1 mono- terminates operating voltage input, other end ground connection；
R2 mono- terminates the second predetermined direct current voltage input end, another termination U1A electrode input ends of another termination R4, R4；
R9 one end connects U1A electrode input end, and the other end is connected with R14, R14 other end ground connection, between R9 and R4
Magnitude of voltage be the second predetermined direct current voltage half, the voltage exports from R9 and R4 tie point；
U1A negative inputs connect R17, another termination R18 of R17, R18 other ends ground connection；U1A negative inputs are also connected with
Another termination P1 of R12, R12 another termination R13, R13 positive pole；R5 is connected between U1A output end and voltage input end；
U1A output termination R8, another termination D8 of R8 positive pole, D8 negative pole connect Q2 base stage；Q2 grounded emitter, Q2
Colelctor electrode connect R3, another termination D2 negative poles of R3 and Q1 base stage.
Described AC-DC conversion charging circuit, preferably：
DC voltage converting circuit includes voltage input end, filter capacitor C3, C6, resistance R21-R26, diode D12, drop
Press conversion chip U2, electrochemical capacitor CE4, CE5, electric capacity C2, C7, C8, inductance L1；Wherein：
The voltage input end connects the first predetermined direct current voltage leading-out ends VCC,
VCC exits connection filter capacitor C6, C6 other end ground connection, R21 mono- terminate voltage input end, another termination two
Pole pipe D12 positive pole, D12 negative poles connect filter capacitor C3, the C3 other end ground connection；D12 negative poles connect U2 voltage input end, U2's
Voltage input end is connected mutually with ON time control terminal by R22, U2 voltage input end connection CE5 positive pole, CE5 negative poles
Ground connection；D12 negative poles connect R23, the input of another termination U2 under-voltage comparators of R23 and R26, R26 other end ground connection, U2's
Earth terminal is grounded, and U2 boottrap capacitor pin is connected with SW switching nodes by C2, and U2 SW switching nodes are connected with L1, L1
The other end is connected with R24, and the R24 other end is connected with U2 feedback ends, and U2 internal circuit output end of pressure-stabilizing is connected with C7, C7's
The other end is grounded, and U2 feedback end is also connected with R25, R25 other end ground connection；U2 feedback end is also connected with C8, and C8's is another
One end is connected with L1 and R24 tie point, and the tie point connects CE4 positive pole, CE4 negative poles ground connection.
Described AC-DC conversion charging circuit, preferably：
DC voltage converting circuit is also including DC voltage conversion chip U3, electric capacity C4, C5, C9, electrochemical capacitor CE3；Its
In
U3 voltage input end and chip select terminal is joined directly together and connects L1 and R24 tie point, control source termination C9, C9
The other end ground connection, U3 earth terminals ground connection, U3 bypass end connection C4, C4 the other end ground connection, voltage output termination CE3 just
Pole and C5, CE3 negative pole and the C5 other end ground connection.
Described AC-DC conversion charging circuit, preferably：
L1 and R24 tie point is the second predetermined direct current voltage output end.
Described AC-DC conversion charging circuit, preferably：
The predetermined direct current voltage output end of U3 voltage output ends the 3rd.
Brief description of the drawings
Fig. 1 is the ac-dc converter circuit structural representation with charge function；
Fig. 2 is AC to DC converter circuit schematic diagram；
Fig. 3 is battery charger schematic diagram；
Fig. 4 is DC voltage converting circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only part of the embodiment of the present invention, rather than whole embodiments.Generally here described in accompanying drawing
It can be configured with the component of the embodiment of the present invention shown with a variety of to arrange and design.Therefore, below in accompanying drawing
The detailed description of the embodiments of the invention of middle offer is not intended to limit the scope of claimed invention, but only table
Show the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not making creative work
Under the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
As there is Fig. 1 present invention the ac-dc converter circuit of charge function to include AC to DC converter circuit, battery charging electricity
Road and DC voltage converting circuit.Illustrated below in conjunction with Fig. 2-4 pairs of above-mentioned three parts circuits.
As shown in Fig. 2 the circuit structure of AC to DC converter circuit is as follows：Two terminals of Industrial Frequency Transformer high voltage end connect
Alternating current 220V mains supply (transformer can select model TT0-1-632-00 transformer), transformer low-voltage end
Three terminals connect relay (its model can be AZ943S) and the rectification circuit being made up of four diodes respectively.Transformer
The low-pressure side the first terminal AC0 relay terminations AZ943S pin of normally-closed contact-the 3；Step down side intermediate terminal AC1 is terminated
The relay AZ943S pin of normally opened contact-the 2；Step down side Second terminal AC2 ends are connected to diode in rectification circuit
D3 positive pole；Relay AZ943S switch contact, i.e. the 1st pin are connected to diode D4 positive pole；Diode D5 plus earths,
Negative pole connection diode D3 positive pole；Diode D6 plus earths, negative pole connection diode D4 positive pole；Diode D3 and two poles
Pipe D4 negative poles are connected, and as the output end of rectification circuit, export as direct current 24V voltages.
LM358 chips are hysteresis comparators, including 2 groups of operational amplifiers, are represented respectively with U1A and U1B in circuit diagram
Operational amplifier U1B is worked by 5,6,7 pin of LM358 chips, and the 50K Ω resistance R7 for connecting U1B is positive feedback resistor, the electricity
Both ends connection U1B 5 pin (electrode input end) and 7 pin (output end) are hindered, for ensureing that 7 pin export enough voltage, with triggering
Q3, Q3 are triode 9013.R10 is 50K Ω resistance, and a termination 6V voltages, 6V voltages are that 12V voltages pass through in battery charger
Cross after electric resistance partial pressure what is obtained, another termination U1B of R10 5 pin, for protecting LM358 5 pin, namely play metering function, limit
System flows into the size of the electric current of 5 pin, to avoid burning out U1B.R15, R16, R19, R20 are divider resistances, and its resistance is respectively 50K
Ω, 15K Ω, 50K Ω and 20K Ω, R19 mono- terminate rectification circuit output end 24V DC voltages, the other end is connected with R15 and is followed by
The pin (negative input) of LM358 the 6th, R20 one end ground connection, the other end connected with R16 and be followed by the pin of LM358 the 6th, R15, R16, R19,
R20 is used for the 24V voltages for obtaining rectification, inputs LM358 6 pin.CE1 and CE2 is 100 μ F/20V electrochemical capacitors, is made
Be filtering.CE1 positive poles connect U1B 6 pin, negative pole ground connection；CE2 positive poles connect Q3 ground levels, negative pole ground connection.U1B 7 pin are output
End, connect another termination Q3 of 4.7K Ω resistance R11, R11 base stage.The pin of magnet coil negative pole 5 of Q3 collector connecting relay, Q3
Grounded emitter.The pin of magnet coil positive pole 4 of relay meets the DC voltage 24V of rectification output；Diode D7 connection relays
The pin of magnet coil both positive and negative polarity 4 and 5 pin of device, D7 are optional model 1N4148, D7 positive pole contact relays RLY1 5 pin, negative pole
Contact relay RLY1 4 pin, D7 are protection diodes.In the case of normal power-up, DC voltage 24V is added to D7 negative poles, and D7 is in
Cut-off state, so diode cuts little ice in circuit, nor affect on the work of other circuits.Down circuitry moment, after
Electrical equipment both ends are just above born under producing, the inverse electromotive force that amplitude is very big, and this inverse electromotive force positive pole is added on diode cathode,
Negative pole is added on diode cathode, diode is in forward conduction state, electric current caused by inverse electromotive force by internal resistance very
Small diode D7 forms loop.Tube voltage drop very little after diode current flow, the inverse electromotive force amplitude at such relay both ends
It is greatly reduced, reaches the purpose of protection driving.
The operation principle of AC to DC converter circuit is as follows：
Alternating current 220V voltage is changed into the 24V electricity that equipment can use using the Industrial Frequency Transformer of TT0-1-632-00 models
Pressure, tetra- diodes of D3, D4, D5 and D6 serve rectified action, the 220V voltages of exchange are changed into direct current 24V voltages.
Whether the 24V DC voltages that hysteresis comparator LM358 is used to compare after changing are too high.Specifically comparison procedure is：U1B
Worked by the 5 of LM358,6,7 pin, the voltage ratio of the input of 5 pin and 6 pin is compared with if 24V overtensions, the output of 7 pin is high electric
It is flat, 9013 diode Q3 are triggered, close relay normally open contact, so as to change the number of turn of step down side secondary coil
(number of turn for reducing secondary coil), reduces output voltage.
, may be unstable because alternating current 220V voltage is civil power, if alternating current 220V civil power is too high, then the 24V of output
Also can accordingly raise, then relay will be acted, and the output number of turn is changed into (reduction), and such output voltage just lowers,
Ensure that output DC voltage will not be too high.
As shown in figure 3, being battery charger, the 12V voltage input ends connection in figure is changed by DC voltage
The direct current 12V voltages obtained after circuit conversion direct current 24V voltages.U1A is worked by the pin of LM358 chips 1,2,3,4,8, wherein 8
Pin is power end, and 4 pin are grounded.8 pin connect 12V voltage input ends, and for powering, electric capacity C1 is 0.1 μ F electric capacity, and effect is filtering,
One termination 12V voltage input ends, other end ground connection.R2, R4 are divider resistances, and resistance is 47K Ω, 4.7K Ω respectively, R2 one end
12V voltage input ends are connect, another termination U1A of another termination R4, R4 3 pin (electrode input end), R9, R14 are divider resistances, resistance
Value is all 47K Ω, R9 one end connection U1A 3 pin, and the other end is connected with R14, R14 other end ground connection.According to voltage divider principle,
Gone out by R2, R4, R9, R14 computing the resistor value, the voltage value of U1A 3 pin is 6V.U1A 2 pin (negative input) meet 25K Ω
Another termination 4.7K Ω of resistance R17, R17 resistance R18, the R18 other end ground connection；U1A 2 pin are also connected with 50K Ω resistance R12,
Another termination rechargeable battery P1 of another termination 50K Ω resistance R13, R13 of R12 positive pole.U1A 1 pin is output end, U1A 1 pin
And 8 positive feedback pull-up resistor R5, R15 resistance are connected between pin is 100K Ω.U1A 1 pin connects 100K Ω resistance R8, the R8 other ends
1N4148 diodes D8 positive pole is connect, D8 negative pole connects 9013 triode Q2 ground level；Q2 grounded emitter.DC voltage
24V is connected by the 1N4007 diodes D1 of two cascades with D2 with TIP42 triodes Q1 base stage, and 24V meets D1 positive pole, D1
Negative pole connect D2 positive pole, D2 negative pole connects Q1 base stage.D2 negative pole and 10 Ω resistance R3 are connected, R3 another termination Q2's
Colelctor electrode.R1 is 5 Ω/2W cement resistor, and R1 mono- terminates DC voltage 24V inputs, another termination Q1 colelctor electrode.Q1's
Emitter stage connects 10 Ω/2W another termination 1N5819 diodes D10 of cement resistor R6, R6 positive pole, and D10 negative pole connects charging electricity
Pond P1 positive pole.
Direct current 24V voltages connect 10A02 diodes D9 positive pole, and D9 negative pole is VCC exits, for DC voltage conversion electricity
Road provides power supply.D9 negative pole is connected with 10A02 diodes D11 negative pole, D11 positive pole and rechargeable battery P1 positive pole phase
Even, the negative pole ground connection of rechargeable battery.
The operation principle of battery charger is as follows：
It is in order to drop voltage, for protecting Q1 ground levels, because a diode drops that 24V DC voltage output ends, which meet D1, D2,
Pressure energy power is inadequate, and this circuit needs two Diode series, and each diode step-down value is the conducting voltage 0.7V of diode.
R5 is positive feedback pull-up resistor, prevents that the driving force that LM358 1 pin exports is inadequate, to increase the 1 of LM358
Pin output voltage.R1 and R6 resistor powers are larger, are to carry out current limliting when charging the battery.Resistance R2, R4, R12,
R14 and resistance R12, R13, R17, R18 have been that component voltage acts on, R12 and R14 resistant series are to adjust resistance for convenience.
Being isolated by diode D9, D11, battery P1 isolates with 24V DC voltage output ends, set by this circuit,
When directly using connection alternating current 220V power supply, because 24V VDs can be slightly above the output voltage of anode, because
This only has 24V DC voltage output end output currents, and battery output is blocked by D11, can avoid mixed with battery, prevents electricity
Pond current reflux, the design of this isolation battery, can also avoid 24V direct voltage output direct charging batteries.Without using 220V
During AC power, battery is powered as power supply.
The effect of U1A and its peripheral circuit seeks to just charge the battery when cell voltage is less than 6V, no
Do not charge then.R2, R4, R9, R14 are divider resistances, and DC voltage 6V is obtained according to voltage divider principle, and 3 pin to U1A provide reference
Voltage；R12, R13, R17, R18 are also divider resistance, and DC voltage 5.5V is obtained (actually due to resistance according to voltage divider principle
Precision and virtual voltage be higher than 24V, therefore it is 6V that actual calculated value, which can be approximately considered), to U1A 2 pin provide compares
Voltage.
When cell voltage is less than 24V, hysteresis comparator LM358 1 pin output high level, strengthen voltage by R5
After R8 protective effect (current limliting) and D8 isolation, turn on Q2.D8, which is played, prevents backward voltage from pouring in down a chimney operational amplifier
Effect.After Q2 conductings, make Q1 base stage reduce level, turn on Q1.After Q1 conductings, direct current 24V power supplys pass through current-limiting resistance R1
And R6, after the protective separation by D10, it is applied directly on the positive pole of battery, can thus charges the battery.D10 is
In order to prevent cell voltage from pouring in down a chimney power supply, the current collection that cell voltage is added to Q1 very likely causes damage to triode.
As shown in figure 4, being DC voltage converting circuit, VCC exits connect the another of 1 μ F filter capacitor C6, C6
One end is grounded.R21 is 1 Ω resistance, and R21 mono- terminates VCC ends, another termination S1D diodes D12 positive pole, and D12 negative poles connect one
100nF filter capacitor C3, the C3 other end ground connection.D12 negative poles connect U2 2 pin (voltage input end), and U2 is LM25017 decompressions
Conversion chip.U2 2 pin and 4 pin (ON time control terminal) are connected mutually by 360K Ω resistance.U2 2 pin connect 100 μ F/
50V electrochemical capacitor CE5 positive pole, CE5 negative poles ground connection.The 3 of another termination U2 of D12 negative poles connection 360K Ω resistance R23, R23
Pin (input of under-voltage comparator) and 91K Ω resistance R26, the R26 other end are grounded, U2 1 pin (earth terminal) ground connection, U2's
7 pin (boottrap capacitor pin) are connected with 8 pin (SW switching nodes) by 10nF electric capacity C2, U2 8 pin and 100 μ H inductance L1 phases
Even, the L1 other ends are connected with 12K Ω resistance R24, and the R24 other end is connected with U2 5 pin (feedback end).U2 6 pin (internal electricity
Road output end of pressure-stabilizing) it is connected with 1 μ F electric capacity C7, C7 other end ground connection.U2 5 pin are also connected with 1.4K Ω resistance R25, R25
The other end ground connection.U2 5 pin are also connected with 1nF electric capacity C8, and the C8 other end is connected with L1 and R24 tie point, the connection
Point magnitude of voltage be chip calculating output voltage 12V, the μ F/25V of 12V connections 100 electrochemical capacitor CE4 positive pole, CE4 negative poles
Ground connection.U3 is LP2992AIM5-3.3 chips, for direct current 12V voltage conversions into direct current 3.3V voltages.U3 1 pin (voltage
Input) and 3 pin (chip select terminal) be joined directly together and connect L1 and R24 tie point, 1 pin connection 100nF electric capacity C9's, C9 is another
End ground connection.U3 2 pin (earth terminal) ground connection, U3 4 pin (bypass end) connection 100nF shunt capacitances C4, C4 other end ground connection,
The 3.3V voltages of 5 pin (voltage output end) output connect 100 μ F/25V electrochemical capacitor CE3 positive pole and 100nF electric capacity C5,
CE3 negative poles and the C5 other end are grounded.
The operation principle of DC voltage converting circuit is as follows：
C6 effect is filtering, and R21 effect is current limliting, and diode D12 effect is anti-reversed, protects U2.
U2 output voltage calculates：
U2 3 pin UVLO are the inputs of under-voltage comparator, as VBUS ＜ VUVLO, U2 chips do not start, in closing mould
Formula.
It is, when the voltage that U2 3 pin input is less than 6.07V, chip U2 does not work.
Direct current 24V is converted into direct current 12V and direct current 3.3V by the present invention with lowering and stabilizing blood pressure chip, improves the work of power supply
Efficiency and stability.
The ac-dc converter circuit of the present invention, its advantage are it is an advantage of the invention that when there is alternating current 220V voltage, are stablized
Output, in no alternating current 220V voltage, operate with batteries stable output.
More than, it is only embodiment of the invention, but protection scope of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (3)
1. a kind of AC-DC conversion charging circuit, including AC to DC converter circuit, charging circuit and DC voltage converting circuit,
It is characterized in that：
AC to DC converter circuit is used to alternating current being converted to the first predetermined direct current voltage output, the output end of the DC voltage with
The input connection of charging circuit, charges for rechargeable battery；
The output end is also connected with the input of DC voltage converting circuit, and the DC voltage converting circuit is by first predetermined direct current
Voltage conversion is to export after the second predetermined direct current voltage and the 3rd predetermined direct current voltage；
The AC to DC converter circuit includes transformer, rectification circuit and anti-overvoltage circuit；
The high voltage side of transformer winding connects 220V AC powers, and low-pressure side winding connects rectification circuit, and rectification circuit is used to become
The alternating current of the first predetermined voltage after depressor transformation is converted to the DC voltage of the first predetermined voltage；
Whether the DC voltage that anti-overvoltage circuit is used to detect after changing is higher than the first predetermined voltage, when higher than the first predetermined electricity
Pressure, anti-overvoltage circuit change the number of turn of step down side winding, reduce the alternating voltage of low-pressure side；
DC voltage converting circuit includes voltage input end, filter capacitor C3, C6, resistance R21-R26, diode D12, decompression turn
Change chip U2, electrochemical capacitor CE4, CE5, electric capacity C2, C7, C8, inductance L1；Wherein：
The voltage input end connects the first predetermined direct current voltage leading-out ends VCC,
VCC exits connection filter capacitor C6, C6 other end ground connection, R21 mono- terminate voltage input end, another terminating diode
D12 positive pole, D12 negative poles connect filter capacitor C3, the C3 other end ground connection；D12 negative poles connect U2 voltage input end, U2 voltage
Input is connected mutually with ON time control terminal by R22, and U2 voltage input end connection CE5 positive pole, CE5 negative poles connect
Ground；D12 negative poles connect R23, the input of another termination U2 under-voltage comparators of R23 and R26, R26 other end ground connection, and U2's connects
Ground terminal is grounded, and U2 boottrap capacitor pin is connected with SW switching nodes by C2, and U2 SW switching nodes are connected with L1, and L1 is another
One end is connected with R24, and the R24 other end is connected with U2 feedback ends, and U2 internal circuit output end of pressure-stabilizing is connected with C7, and C7's is another
One end is grounded, and U2 feedback end is also connected with R25, R25 other end ground connection；U2 feedback end is also connected with C8, and C8's is another
End is connected with L1 and R24 tie point, and the tie point connects CE4 positive pole, CE4 negative poles ground connection.
2. AC-DC conversion charging circuit according to claim 1, it is characterised in that：
Rectification circuit is made up of four diodes D3, D4, D5 and D6；Transformer low voltage side winding includes three terminals, respectively
Connect relay and rectification circuit；
The wherein normally-closed contact of the first terminal contact relay；The normally opened contact of intermediate terminal contact relay；Second terminal is connected to
Diode D3 positive pole in rectification circuit；Relay switch contacts are connected to diode D4 positive pole；Diode D5 plus earths,
Negative pole connection diode D3 positive pole；Diode D6 plus earths, negative pole connection diode D4 positive pole；Diode D3 and two poles
Pipe D4 negative poles are connected, the output end as rectification circuit.
3. AC-DC conversion charging circuit according to claim 1, it is characterised in that：
The charging circuit includes charging paths and battery voltage detection circuit, and the charging paths are used to fill for rechargeable battery
Electricity, the battery voltage detection circuit is used for the voltage for detecting rechargeable battery, when the voltage of rechargeable battery is less than predetermined voltage threshold
During value, battery voltage detection circuit controls charging paths to be charged for rechargeable battery.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029266.7A CN108199461B (en) | 2016-04-08 | 2016-04-08 | Alternating current-direct current conversion circuit with charging function |
| CN201810029276.0A CN108199462B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion circuit |
| CN201610217109.XA CN105790399B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610217109.XA CN105790399B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion charging circuit |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810029276.0A Division CN108199462B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion circuit |
| CN201810029266.7A Division CN108199461B (en) | 2016-04-08 | 2016-04-08 | Alternating current-direct current conversion circuit with charging function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105790399A CN105790399A (en) | 2016-07-20 |
| CN105790399B true CN105790399B (en) | 2018-03-02 |
Family
ID=56395119
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810029266.7A Active CN108199461B (en) | 2016-04-08 | 2016-04-08 | Alternating current-direct current conversion circuit with charging function |
| CN201810029276.0A Active CN108199462B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion circuit |
| CN201610217109.XA Active CN105790399B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion charging circuit |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810029266.7A Active CN108199461B (en) | 2016-04-08 | 2016-04-08 | Alternating current-direct current conversion circuit with charging function |
| CN201810029276.0A Active CN108199462B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108199461B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199461B (en) * | 2016-04-08 | 2020-03-03 | 国家康复辅具研究中心 | Alternating current-direct current conversion circuit with charging function |
| CN106291321B (en) * | 2016-08-04 | 2020-07-28 | 上海交通大学 | L abWindows/CVI-based plasma power supply circuit automatic test platform and method |
| CN110165777A (en) * | 2019-05-07 | 2019-08-23 | 数知(北京)物联科技有限公司 | A kind of power-supply management system and power supply relational approach applied to city intelligent street lamp |
| TWI786641B (en) * | 2021-05-20 | 2022-12-11 | 固緯電子實業股份有限公司 | Power converter and its current limiting control circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3202651B2 (en) * | 1997-05-14 | 2001-08-27 | 米沢日本電気株式会社 | Input power control type charging system |
| CN101567569A (en) * | 2008-04-25 | 2009-10-28 | 华硕电脑股份有限公司 | Switched power supply and electronic device applying same |
| CN201601618U (en) * | 2010-01-12 | 2010-10-06 | 雷彼得 | Automatic regulating transformer capable of regulating voltage through sensing current of circuit |
| CN203562832U (en) * | 2013-09-06 | 2014-04-23 | 广州凯盛电子科技有限公司 | A power supply for seamlessly switching multiple power supply modules |
| CN204243884U (en) * | 2014-06-27 | 2015-04-01 | 广东电网公司佛山供电局 | For the supply unit of distribution terminal |
| CN205646962U (en) * | 2016-04-08 | 2016-10-12 | 国家康复辅具研究中心 | Alternating current -direct current conversion charging circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086474U (en) * | 1991-01-04 | 1991-10-09 | 朱培立 | Primary winding-adjusting charging machine |
| CN2271061Y (en) * | 1996-01-15 | 1997-12-17 | 刘明诚 | Charger for automobile storage battery |
| CN104917261B (en) * | 2015-07-10 | 2017-07-07 | 李文华 | A kind of car emergency startup power supply with many gear charge functions |
| CN108199461B (en) * | 2016-04-08 | 2020-03-03 | 国家康复辅具研究中心 | Alternating current-direct current conversion circuit with charging function |
-
2016
- 2016-04-08 CN CN201810029266.7A patent/CN108199461B/en active Active
- 2016-04-08 CN CN201810029276.0A patent/CN108199462B/en active Active
- 2016-04-08 CN CN201610217109.XA patent/CN105790399B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3202651B2 (en) * | 1997-05-14 | 2001-08-27 | 米沢日本電気株式会社 | Input power control type charging system |
| CN101567569A (en) * | 2008-04-25 | 2009-10-28 | 华硕电脑股份有限公司 | Switched power supply and electronic device applying same |
| CN201601618U (en) * | 2010-01-12 | 2010-10-06 | 雷彼得 | Automatic regulating transformer capable of regulating voltage through sensing current of circuit |
| CN203562832U (en) * | 2013-09-06 | 2014-04-23 | 广州凯盛电子科技有限公司 | A power supply for seamlessly switching multiple power supply modules |
| CN204243884U (en) * | 2014-06-27 | 2015-04-01 | 广东电网公司佛山供电局 | For the supply unit of distribution terminal |
| CN205646962U (en) * | 2016-04-08 | 2016-10-12 | 国家康复辅具研究中心 | Alternating current -direct current conversion charging circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108199461B (en) | 2020-03-03 |
| CN108199462A (en) | 2018-06-22 |
| CN105790399A (en) | 2016-07-20 |
| CN108199462B (en) | 2020-12-01 |
| CN108199461A (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101262140B (en) | Serial and parallel switching and charging method and charging device for lithium dynamic battery unit | |
| CN105790399B (en) | AC-DC conversion charging circuit | |
| CN101316047B (en) | Emergency power supply with charger | |
| CN101409453B (en) | Uninterruption power supply | |
| CN104021978B (en) | Permanent magnetic vacuum switch divide-shut brake capacitance galvanostatic charging switching device shifter and control method thereof | |
| CN208386212U (en) | A kind of uninterruptible power supply | |
| CN205646962U (en) | Alternating current -direct current conversion charging circuit | |
| CN112886718B (en) | Resonance compensation type current transformer induction power taking system | |
| CN2610549Y (en) | Charger for mobile phone | |
| CN205610295U (en) | Charging circuit of lithium cell group | |
| CN202353283U (en) | Universal combined solar charger | |
| CN201266996Y (en) | Mobile phone battery and mobile phone with the same | |
| CN104393651B (en) | Two-way lossless active equalization device | |
| CN205335946U (en) | Adjustable battery charging outfit of aircraft battery | |
| CN205231837U (en) | Voltage track -hold circuit based on single -phase contravariant | |
| CN204290428U (en) | A kind of integrate motor drives and battery charging function module | |
| CN107069912A (en) | A kind of USB interface-based adaptive quick-charging circuit | |
| CN2446707Y (en) | Three stage controlled balance charger | |
| CN202888916U (en) | Multifunctional charging device capable of automatically identifying voltage | |
| CN202652055U (en) | Electrolytic capacitor charging circuit | |
| CN2879501Y (en) | Two-use side charger | |
| CN103199580A (en) | Intelligent charging system | |
| CN209562432U (en) | Converter topology unit and converter device | |
| CN104009528A (en) | Storage battery charging circuit and charging method thereof | |
| CN107134837A (en) | The efficient charging of serial connected super electric capacity and controllable voltage electric supply installation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |