CN108199462A - A kind of ac-dc converter circuit - Google Patents
A kind of ac-dc converter circuit Download PDFInfo
- Publication number
- CN108199462A CN108199462A CN201810029276.0A CN201810029276A CN108199462A CN 108199462 A CN108199462 A CN 108199462A CN 201810029276 A CN201810029276 A CN 201810029276A CN 108199462 A CN108199462 A CN 108199462A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- resistance
- direct current
- output
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 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
- 230000006837 decompression 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, including AC to DC converter circuit, charging circuit and DC voltage converting circuit, wherein：AC to DC converter circuit is used to alternating current being converted to the first predetermined direct current voltage output, and the output terminal of the DC voltage and the input terminal of charging circuit are connected, charged for rechargeable battery；The output terminal is also connected with the input terminal of DC voltage converting circuit, which exports after the first predetermined direct current voltage is converted to the second predetermined direct current voltage and third predetermined direct current voltage.The present invention stablizes output, in no alternating current 220V voltage, stable output can be realized by operating with batteries when there is alternating current 220V voltage.
Description
The application be application No. is " 201610217109.X ", the applying date is on April 8th, 2016, entitled " hands over straight
Circulation change charging circuit " application for a patent for invention divisional application
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, stablize output, in no alternating current 220V voltage, lean on
Battery the operation is stable exports, and in addition to this, the present invention has further the advantage that：
1. when connecting alternating current 220V voltage, stablize output DC voltage 24V, 12V and 3.3V, battery is according to charge condition
Charging.When disconnecting alternating current 220V voltage, battery work can also stablize output direct current 24V, 12V and 3.3V.
2. alternating current 220V voltage is alternating current, may be unstable, if alternating current 220V alternating current is excessively high, then the 24V of output
It can accordingly increase, 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 excessively 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 obtained by divider resistance component voltage.
4. by two cascade diode-isolated batteries, 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.The design of battery is isolated, is 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 working efficiency of power supply is improved
And stability.
Invention content
It is suitable for driving direct current generator the object of the present invention is to provide one kind and other control units provides power supply, improves electricity
The stability in use in source.
Purpose to realize the present invention, is achieved using following technical scheme：
A kind of AC-DC conversion charging circuit converts electricity including AC to DC converter circuit, charging circuit and DC voltage
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 connect with the input terminal of charging circuit, is charged for rechargeable battery；
The output terminal is also connected with the input terminal of DC voltage converting circuit, which first makes a reservation for this
DC voltage exports after being converted to the second predetermined direct current voltage and third predetermined direct current voltage.
The 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 anti-overvoltage circuit is for detecting transformed DC voltage 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.
The AC-DC conversion charging circuit, preferably：
Rectification circuit is made 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 first terminal contact relay；The normally opened contact of intermediate terminal contact relay；Second terminal connects
It is connected to the anode of diode D3 in rectification circuit；Relay switch contacts are connected to the anode of diode D4；Diode D5 anodes
Ground connection, the anode of cathode connection diode D3；Diode D6 plus earths, the anode of cathode connection diode D4；Diode D3
It is connected with diode D4 cathode, the output terminal as rectification circuit.
The 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 electrolytic capacitor CE1 and CE2, resistance R11 and diode D7；Wherein：
Positive feedback resistor R7 is connected between the electrode input end and output terminal of U1B；Output terminal connects the base stage of Q3；
R10 mono- terminates direct voltage output of the voltage value for the half of the second predetermined direct current voltage, and another termination U1B is just
Pole input terminal；
R19 mono- terminates rectification circuit output end, the other end connects with R15 and is followed by the negative input of U1B, and R20 mono- is terminated
Ground, the other end are connected with R16 is followed by the negative input of U1B；
CE2 anodes connect the negative input of U1B, cathode ground connection；CE1 anodes connect Q3 base stages, cathode ground connection；The output of U1B
Terminate R11, the ground level of another termination Q3 of R11；
The electromagnetic coil cathode of the collector connecting relay of Q3, the emitter ground connection of Q3, the electromagnetic coil anode of relay
Connect the output terminal of rectification circuit；The cathode of D7 anode contact relay electromagnetic coils, cathode connect the anode of electromagnetic coil.
The AC-DC conversion charging circuit, preferably：
The charging circuit includes charging paths and battery voltage detection circuit, and the charging paths are used for as rechargeable battery
Charging, the battery voltage detection circuit are used to detect the voltage of rechargeable battery, when the voltage of rechargeable battery is less than predetermined voltage
During threshold value, battery voltage detection circuit controls charging paths to charge for rechargeable battery.
The 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 anode of the output termination D1 of rectification circuit, the cathode of D1 connect the anode of D2, and the cathode of D2 connects the base stage of Q1；
The cathode of D2 is connected with R3, the collector of another termination Q2 of R3, and R1 mono- terminates the output terminal of rectification circuit, another
The collector of Q1 is terminated, the emitter of Q1 meets R6, the anode of another termination D10 of R6, and the cathode of D10 is meeting rechargeable battery P1 just
Pole, the anode of the output termination D9 of rectification circuit, cathode that the cathode of D9 is the first predetermined direct current voltage leading-out ends VCC, D9 and
The cathode of D11 is connected, and the anode of D11 is connected with the anode of P1, the cathode ground connection of P1；
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 ground terminals are grounded, and control source terminates the second predetermined direct current voltage input end；
C1 mono- terminates operating voltage input terminal, 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 the electrode input end of U1A, and the other end is connected with R14, the other end ground connection of R14, between R9 and R4
Voltage value be the second predetermined direct current voltage half, which exports from the tie point of R9 and R4；
U1A negative inputs connect R17, another termination R18 of R17, R18 other ends ground connection；U1A negative inputs are also connected with
The anode of another termination P1 of R12, R12 another termination R13, R13；R5 is connected between the output terminal and voltage input end of U1A；
The anode of another termination D8 of U1A output termination R8, R8, the cathode of D8 connect the base stage of Q2；The emitter ground connection of Q2, Q2
Collector meet R3, the cathode of another termination D2 of R3 and the base stage of Q1.
The 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, electrolytic capacitor CE4, CE5, capacitance C2, C7, C8, inductance L1；Wherein：
The voltage input end connects the first predetermined direct current voltage leading-out ends VCC,
The other end ground connection of VCC exits connection filter capacitor C6, C6, R21 mono- terminate voltage input end, another termination two
The anode of pole pipe D12, D12 cathode connect filter capacitor C3, the C3 other end ground connection；D12 cathode connect the voltage input end of U2, U2's
Voltage input end is connected mutually with turn-on time control terminal by R22, the anode of the voltage input end connection CE5 of U2, CE5 cathode
Ground connection；D12 cathode connect R23, the input terminal of another termination U2 under-voltage comparators of R23 and the other end ground connection of R26, R26, U2's
Ground terminal is grounded, and the boottrap capacitor pin of U2 is connected with SW switching nodes by C2, and the SW switching nodes of U2 are connected with L1, L1
The other end is connected with R24, and the other end of R24 is connected with U2 feedback ends, and the internal circuit output end of pressure-stabilizing of U2 is connected with C7, C7's
The other end is grounded, and the feedback end of U2 is also connected with R25, the other end ground connection of R25；The feedback end of U2 is also connected with C8, and C8's is another
One end is connected with the tie point of L1 and R24, which connects the anode of CE4, CE4 cathode ground connection.
The AC-DC conversion charging circuit, preferably：
DC voltage converting circuit further includes DC voltage conversion chip U3, capacitance C4, C5, C9, electrolytic capacitor CE3；Its
In
The voltage input end and chip select terminal of U3 is connected directly and connects L1 and the tie point of R24, control source termination C9, C9
The other end ground connection, U3 ground terminals ground connection, U3 bypass end connection C4, C4 the other end ground connection, voltage output termination CE3 just
Pole and the other end of C5, CE3 cathode and C5 ground connection.
The AC-DC conversion charging circuit, preferably：
The tie point of L1 and R24 is the second predetermined direct current voltage output end.
The AC-DC conversion charging circuit, preferably：
U3 voltage output end third predetermined direct current voltage output ends.
Description of the drawings
Fig. 1 is the ac-dc converter circuit structure diagram 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.
Specific embodiment
Below in conjunction with attached drawing, the technical solution 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, instead of all the embodiments.Usually here described in attached drawing
It can be configured to arrange and design with a variety of different with the component of the embodiment of the present invention shown.Therefore, below in attached drawing
The detailed description of the embodiment of the present invention of middle offer is not intended to limit the range of claimed invention, but only table
Show the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not making creative work
Under the premise of all other embodiments obtained, shall fall within the protection scope of the present 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.It is 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 the transformer of model TTO-1-632-00), transformer low-voltage end
Three terminals connect relay (its model can be AZ943S) and the rectification circuit being made of four diodes respectively.Transformer
3 foot of normally-closed contact-the of low-pressure side first terminal AC0 relay terminations AZ943S；Step down side intermediate terminal AC1 is terminated
2 foot of normally opened contact-the of relay AZ943S；Step down side Second terminal AC2 ends are connected to diode in rectification circuit
The anode of D3；The switch contact of relay AZ943S, i.e. the 1st foot are connected to the anode of diode D4；Diode D5 plus earths,
The anode of cathode connection diode D3；Diode D6 plus earths, the anode of cathode connection diode D4；Diode D3 and two poles
Pipe D4 cathode are connected, and as the output terminal 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 feet of LM358 chips, and the 50K Ω resistance R7 for connecting U1B is positive feedback resistor, the electricity
Both ends connection 5 feet (electrode input end) of U1B and 7 feet (output terminal) are hindered, for ensureing that 7 feet 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, 5 feet of another termination U1B of R10, for protecting 5 feet of LM358 namely playing metering function, limit
System flows into the size of the electric current of 5 feet, to avoid U1B is burnt out.R15, R16, R19, R20 are divider resistances, and resistance value 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 6th feet (negative input) of LM358, R20 one end ground connection, the other end connect with R16 and be followed by the 6th feet of LM358, R15, R16, R19,
R20 is used for the 24V voltages for obtaining rectification, inputs 6 feet of LM358.CE1 and CE2 is 100 μ F/20V electrolytic capacitors, is made
Be filtering.CE1 anodes connect 6 feet of U1B, cathode ground connection；CE2 anodes connect Q3 ground levels, cathode ground connection.7 feet of U1B are output
End connects the base stage of another termination Q3 of 4.7K Ω resistance R11, R11.5 foot of electromagnetic coil cathode of the collector connecting relay of Q3, Q3
Emitter ground connection.4 foot of electromagnetic coil anode of relay meets the DC voltage 24V of rectification output；Diode D7 connection relays
4 foot of electromagnetic coil positive and negative anodes of device and 5 feet, D7 be optional model 1N4148,5 feet of D7 anode contact relays RLY1, cathode
4 feet of contact relay RLY1, D7 are protection diodes.In the case of normal power-up, DC voltage 24V is added to D7 cathode, and D7 is in
Cut-off state so diode cuts little ice in circuit, nor affects on the work of other circuits.Down circuitry moment, after
Electric appliance both ends are just above born under generating, the inverse electromotive force that amplitude is very big, this inverse electromotive force anode is added on diode cathode,
Cathode is added on diode cathode, and diode is made to be in forward conduction state, the electric current that inverse electromotive force generates by internal resistance very
Small diode D7 forms circuit.Tube voltage drop very little after diode current flow, the inverse electromotive force amplitude at such relay both ends
It is greatly reduced, achievees the purpose that 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 TTO-1-632-00 models
Pressure, tetra- diodes of D3, D4, D5 and D6 play rectified action, the 220V voltages of exchange are changed into direct current 24V voltages.
Whether hysteresis comparator LM358 is excessively high for more transformed 24V DC voltages.Specifically comparison procedure is：U1B
It being worked by the 5 of LM358,6,7 feet, the voltage of the input of 5 feet and 6 feet compares, if 24V overtensions, the high electricity of 7 feet output
It is flat, 9013 diode Q3 are triggered, are closed 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 alternating current, if alternating current 220V alternating current is excessively high, then the 24V of output
Also it can accordingly increase, then relay will act, and the output number of turn is changed (reduction), and such output voltage just lowers,
Ensure that output DC voltage will not be excessively high.
As shown in figure 3, for battery charger, what the 12V voltage input ends in figure connected is converted by DC voltage
The direct current 12V voltages obtained after circuit conversion direct current 24V voltages.U1A is worked by 1,2,3,4,8 foot of LM358 chips, wherein 8
Foot is power end, and 4 feet are grounded.8 feet connect 12V voltage input ends, and for powering, capacitance C1 is 0.1 μ F capacitances, and effect is filtering,
One termination 12V voltage input ends, other end ground connection.R2, R4 are divider resistances, and resistance value is 47K Ω, 4.7K Ω respectively, R2 one end
12V voltage input ends are connect, 3 feet (electrode input end) of another termination U1A of another termination R4, R4, R9, R14 are divider resistances, resistance
Value is all 3 feet of 47K Ω, R9 one end connection U1A, and the other end is connected with R14, the other end ground connection of R14.According to voltage divider principle,
Gone out by the computing the resistor value of R2, R4, R9, R14, the voltage value of 3 feet of U1A is 6V.2 feet (negative input) of U1A meet 25K Ω
Resistance R18, the R18 other end ground connection of another termination 4.7K Ω of resistance R17, R17；2 feet of U1A are also connected with 50K Ω resistance R12,
The anode of another termination rechargeable battery P1 of another termination 50K Ω resistance R13, R13 of R12.1 foot of U1A be output terminal, 1 foot of U1A
And 8 connection positive feedback pull-up resistor R5, R15 resistance value between foot be 100K Ω.1 foot of U1A connects 100K Ω resistance R8, the R8 other ends
The anode of 1N4148 diodes D8 is connect, the cathode of D8 connects the ground level of 9013 triode Q2；The emitter ground connection of Q2.DC voltage
24V is connected by two cascade 1N4007 diodes D1 with the base stage of D2 with TIP42 triodes Q1, and 24V meets the anode of D1, D1
Cathode connect the anode of D2, the cathode of D2 connects the base stage of Q1.The cathode of D2 and 10 Ω resistance R3 are connected, another termination Q2's of R3
Collector.R1 is the cement resistor of 5 Ω/2W, and R1 mono- terminates DC voltage 24V input terminals, the collector of another termination Q1.Q1's
Emitter connects the anode of another termination 1N5819 diodes D10 of cement resistor R6, R6 of 10 Ω/2W, and the cathode of D10 connects charging electricity
The anode of pond P1.
Direct current 24V voltages connect the anode of 10A02 diodes D9, and the cathode of D9 is VCC exits, for DC voltage conversion electricity
Road provides power supply.The cathode of D9 is connected with the cathode of 10A02 diodes D11, the anode of D11 and the anode phase of rechargeable battery P1
Even, the cathode 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, since a diode drops that 24V DC voltage output ends, which meet D1, D2,
Pressure energy power is inadequate, 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 the driving force that 1 foot of LM358 exports inadequate, to increase the 1 of LM358
Foot 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, and the series connection of R12 and R14 resistance is to adjust resistance value for convenience.
It is isolated by diode D9, D11, battery P1 is isolated with 24V DC voltage output ends, is set by this circuit,
When directly using connection alternating current 220V power supply, since 24V DC output voltage 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
It does not charge then.R2, R4, R9, R14 are divider resistances, and DC voltage 6V is obtained according to voltage divider principle, and reference is provided to 3 feet of U1A
Voltage；R12, R13, R17, R18 are also divider resistance, and DC voltage 5.5V is obtained (actually due to resistance value according to voltage divider principle
Precision and virtual voltage be higher than 24V, therefore it is 6V that practical calculated value, which can be approximately considered), to U1A 2 feet offer compare
Voltage.
When cell voltage is less than 24V, the 1 foot output high level of hysteresis comparator LM358 enhances voltage by R5
After the protective effect (current limliting) and the isolation of D8 of R8, Q2 is connected.D8, which is played, prevents backward voltage from pouring in down a chimney operational amplifier
Effect.After Q2 conductings, make the base stage of Q1 reduce level, Q1 is connected.After Q1 conductings, direct current 24V power supplys pass through current-limiting resistance R1
And R6, it after the protective separation by D10, is applied directly on the anode of battery, can thus charge the battery.D10 is
Cell voltage pours in down a chimney power supply in order to prevent, and the current collection that cell voltage is added to Q1 very likely damages triode.
As shown in figure 4, being DC voltage converting circuit, VCC exits connect the another of the filter capacitor C6, C6 of a 1 μ F
One end is grounded.R21 is 1 Ω resistance, and R21 mono- terminates VCC ends, the anode of another termination S1D diodes D12, and D12 cathode connect one
Filter capacitor C3, the C3 other end ground connection of 100nF.D12 cathode connect 2 feet (voltage input end) of U2, and U2 is LM25017 decompressions
Conversion chip.2 feet of U2 and 4 feet (turn-on time control terminal) are connected mutually by 360K Ω resistance.2 feet of U2 connect 100 μ F/
The anode of the electrolytic capacitor CE5 of 50V, CE5 cathode ground connection.The 3 of another termination U2 of D12 cathode connection 360K Ω resistance R23, R23
The other end of foot (input terminal of under-voltage comparator) and 91K Ω resistance R26, R26 are grounded, 1 foot (ground terminal) ground connection of U2, U2's
7 feet (boottrap capacitor pin) are connected with 8 feet (SW switching nodes) by 10nF capacitances C2,8 feet of U2 and 100 μ H inductance L1 phases
Even, the L1 other ends are connected with 12K Ω resistance R24, and the other end of R24 is connected with 5 feet (feedback end) of U2.6 feet (the internal electricity of U2
Road output end of pressure-stabilizing) it is connected with 1 μ F capacitances C7, the other end ground connection of C7.5 feet of U2 are also connected with 1.4K Ω resistance R25, R25
The other end ground connection.5 feet of U2 are also connected with 1nF capacitances C8, and the other end of C8 is connected with the tie point of L1 and R24, the connection
Calculating output voltage 12V of the voltage value of point for chip, the anode of the electrolytic capacitor CE4 of 100 μ F/25V of 12V connections, CE4 cathode
Ground connection.U3 is LP2992AIM5-3.3 chips, for direct current 12V voltages to be converted into direct current 3.3V voltages.1 foot (the voltage of U3
Input terminal) and 3 feet (chip select terminal) be connected directly and connect L1 and the tie point of R24,1 foot connection 100nF capacitances C9's, C9 is another
End ground connection.2 feet (ground terminal) ground connection of U3, the other end ground connection of 4 feet (bypass end) connection 100nF shunt capacitances C4, C4 of U3,
The 3.3V voltages connection anode of electrolytic capacitor CE3 of 100 μ F/25V and 100nF capacitance C5 of 5 feet (voltage output end) output,
The other end of CE3 cathode and C5 are grounded.
The operation principle of DC voltage converting circuit is as follows：
The effect of C6 is filtering, and the effect of R21 is current limliting, and the effect of diode D12 is anti-reversed, protects U2.
The output voltage of U2 calculates：
The 3 foot UVLO of U2 are the input terminals of under-voltage comparator, as VBUS ＜ VUVLO, U2 chips do not start, in closing mould
Formula.
It is, when the voltage that 3 feet of U2 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, 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, operates with batteries and stablizes output.
More than, only specific embodiment of the invention, but protection scope of the present invention is not limited thereto is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in change or replacement, should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention described should be subject to the protection scope in claims.
Claims (5)
1. a kind of ac-dc converter circuit, special including AC to DC converter circuit, charging circuit and DC voltage converting circuit
Sign is：
AC to DC converter circuit is used to alternating current being converted to the first predetermined direct current voltage output, the output terminal of the DC voltage with
The input terminal connection of charging circuit, charges for rechargeable battery；
The output terminal is also connected with the input terminal of DC voltage converting circuit, and the DC voltage converting circuit is by first predetermined direct current
Voltage exports after being converted to the second predetermined direct current voltage and third 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 anti-overvoltage circuit is for detecting transformed DC voltage 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.
2. ac-dc converter circuit according to claim 1, it is characterised in that：
The 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 electrolytic capacitor CE1 and CE2, resistance R11 and diode D7.
3. ac-dc converter 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 are used to detect the voltage of rechargeable battery, when the voltage of rechargeable battery is less than predetermined voltage threshold
During value, battery voltage detection circuit controls charging paths to charge for rechargeable battery.
4. ac-dc converter circuit according to claim 3, it is characterised in that：
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.
5. ac-dc converter circuit according to claim 1, it is characterised in that：It is defeated that DC voltage converting circuit includes voltage
Enter end, filter capacitor C3, C6, resistance R21-R26, diode D12 are depressured conversion chip U2, electrolytic capacitor CE4, CE5, capacitance
C2, C7, C8, inductance L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810029276.0A CN108199462B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610217109.XA Division CN105790399B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion charging circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108199462A true CN108199462A (en) | 2018-06-22 |
| CN108199462B CN108199462B (en) | 2020-12-01 |
Family
ID=56395119
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610217109.XA Active CN105790399B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion charging circuit |
| CN201810029276.0A Active CN108199462B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion circuit |
| CN201810029266.7A Active CN108199461B (en) | 2016-04-08 | 2016-04-08 | Alternating current-direct current conversion circuit with charging function |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610217109.XA Active CN105790399B (en) | 2016-04-08 | 2016-04-08 | AC-DC conversion charging circuit |
Family Applications After (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN105790399B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199461A (en) * | 2016-04-08 | 2018-06-22 | 国家康复辅具研究中心 | A kind of ac-dc converter circuit with charge function |
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104917261A (en) * | 2015-07-10 | 2015-09-16 | 李文华 | Emergency starting power supply with multi-gear charge function for automobile |
| CN105790399A (en) * | 2016-04-08 | 2016-07-20 | 国家康复辅具研究中心 | Alternating current-direct current conversion charging circuit |
| 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 (5)
| 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 |
| JP3202651B2 (en) * | 1997-05-14 | 2001-08-27 | 米沢日本電気株式会社 | Input power control type charging system |
| 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 |
-
2016
- 2016-04-08 CN CN201610217109.XA patent/CN105790399B/en active Active
- 2016-04-08 CN CN201810029276.0A patent/CN108199462B/en active Active
- 2016-04-08 CN CN201810029266.7A patent/CN108199461B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104917261A (en) * | 2015-07-10 | 2015-09-16 | 李文华 | Emergency starting power supply with multi-gear charge function for automobile |
| CN105790399A (en) * | 2016-04-08 | 2016-07-20 | 国家康复辅具研究中心 | Alternating current-direct current conversion charging circuit |
| 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 |
| CN108199461A (en) * | 2016-04-08 | 2018-06-22 | 国家康复辅具研究中心 | A kind of ac-dc converter circuit with charge function |
Non-Patent Citations (1)
| Title |
|---|
| 曹才开等: "《电路与电子技术实验》", 31 December 2009, 中南大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199461A (en) * | 2016-04-08 | 2018-06-22 | 国家康复辅具研究中心 | A kind of ac-dc converter circuit with charge function |
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108199461A (en) | 2018-06-22 |
| CN105790399B (en) | 2018-03-02 |
| CN105790399A (en) | 2016-07-20 |
| CN108199461B (en) | 2020-03-03 |
| CN108199462B (en) | 2020-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204794705U (en) | Multiplexed output flyback converter of uninterrupted power supply | |
| CN105790399B (en) | AC-DC conversion charging circuit | |
| CN208386212U (en) | A kind of uninterruptible power supply | |
| CN205646962U (en) | Alternating current -direct current conversion charging circuit | |
| CN104682680A (en) | Rectification and filtering method and circuit | |
| CN101409453B (en) | Uninterruption power supply | |
| CN112886718B (en) | Resonance compensation type current transformer induction power taking system | |
| CN203504264U (en) | Charger capable of switching doubling-voltage automatically | |
| CN206575206U (en) | A kind of charger circuit structure | |
| CN2610549Y (en) | Charger for mobile phone | |
| CN114865760A (en) | Induction power supply based on non-closed magnetic core and power supply method thereof | |
| CN201797365U (en) | Charger for storage batteries of electric vehicles | |
| CN201266996Y (en) | Mobile phone battery and mobile phone with the same | |
| CN205847086U (en) | A kind of switching capacity type high-gain quasi-Z source DC DC changer | |
| CN107069912A (en) | A kind of USB interface-based adaptive quick-charging circuit | |
| CN205335946U (en) | Adjustable battery charging outfit of aircraft battery | |
| CN204290428U (en) | A kind of integrate motor drives and battery charging function module | |
| CN201656417U (en) | Microcomputer protection measuring and controlling device of permanent magnetic vacuum breaker | |
| CN202888916U (en) | Multifunctional charging device capable of automatically identifying voltage | |
| CN2600968Y (en) | UPS uninterruption power supply device | |
| CN205725084U (en) | Supply unit | |
| CN213185598U (en) | Charging circuit capable of achieving zero-voltage charging | |
| CN206759131U (en) | A kind of USB interface-based adaptive quick-charging circuit | |
| CN2879501Y (en) | Two-use side charger | |
| CN103199580A (en) | Intelligent charging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |