Utility model content
Large for prior art battery volume, price is high, the problem that maintenance cost is expensive, overcome for prior art in the unexpected power-off of civil power simultaneously, equipment does not have reserve battery, causes unit exception to close the problem brought, and therefore the utility model proposes a kind of monocell automation uninterrupted power supply(ups), reduce volume and the maintenance cost of device battery, improve the reliability of device.Be that equipment is powered in the moment battery backup of civil power power-off, ensured the safety of equipment.
The utility model adopts following technical scheme:
A kind of monocell automation uninterrupted power supply(ups), it includes,
Electromagnetic interference filter circuit, for the mains voltage of input is carried out filtering, filtered first alternating voltage flows to the first current rectifying and wave filtering circuit;
First current rectifying and wave filtering circuit, for filtered first alternating voltage is converted to the first direct voltage, the first direct voltage provides voltage for start-up circuit and main switch control circuit;
Start-up circuit, for carrying out voltage stabilizing control to the first direct voltage, for the first pulse width control circuit provides starting resistor;
Main switch control circuit, is converted to the second alternating voltage of the former limit winding of input main transformer by the first direct voltage by switch control rule;
Main transformer, former limit winding inputs the second alternating voltage, and the first vice-side winding exports the 3rd alternating voltage;
Second current rectifying and wave filtering circuit, for carrying out rectifying and wave-filtering to the 3rd alternating voltage, is converted to the second direct voltage output to load;
First feedback loop, for the second direct voltage is converted to feedback voltage, flows to the first pulse width control circuit;
First pulse width control circuit, receives the feedback voltage of the first feedback loop, controls output pulse width modulation, controls driving transforming circuit;
Drive transforming circuit, according to the pulse width modulation of the first pulse width control input, control the break-make of main switch control circuit;
Booster circuit, for battery voltage being elevated to the 3rd direct voltage, the 3rd direct voltage flows to isolating diode;
Isolating diode, the input of described isolating diode is the 3rd DC voltage output end, exports termination second DC voltage input end mouth;
Second feedback circuit, for the 3rd direct voltage is carried out dividing potential drop, the voltage after dividing potential drop flows to the second pulse width control circuit;
Second pulse width control circuit, for the voltage according to second feed back loop input, the output of control impuls width modulated;
Driving isolation circuit, carries out boosting rectifier control according to pulse width modulation to booster circuit.
Further, battery pack is monocell.
Further, isolating diode is supper-fast recovery diode.
Further, also comprise charging circuit, charging circuit is used for charging to battery pack.
Further, main transformer also comprises the second vice-side winding and the 3rd vice-side winding, and the second vice-side winding of described main transformer exports the 4th alternating voltage, and the 3rd vice-side winding exports the 5th alternating voltage.
Further, also comprise the first auxiliary power circuit, for the 4th alternating voltage is converted to the first accessory power supply, the first accessory power supply is the first pulse width control circuit and drives transforming circuit to power;
Further, also comprise the second auxiliary power circuit, for the 5th alternating voltage is converted to the second accessory power supply, the second accessory power supply is charging circuit, the second pulse width control circuit and driving isolation circuit supply.
Further, main switch control circuit comprises field effect transistor Q2, field effect transistor Q6, the drain electrode of field effect transistor Q2 connects the output head anode of the first current rectifying and wave filtering circuit, field effect transistor Q2 grid connects the first output driving transforming circuit, and the source electrode of field effect transistor Q2 connects the first end of main transformer former limit winding; The drain electrode of field effect transistor Q6 connects the second end of main transformer former limit winding, and field effect transistor Q6 grid connects the second output driving transforming circuit, the source ground of field effect transistor Q6.
Further, booster circuit comprises the first switching circuit, second switch circuit, inductance L 5, electric capacity C44 and electric capacity C45, second switch circuit is identical with the structure of the first switching circuit, and second switch circuit is connected with driving isolation circuit respectively with the input of the first switching circuit; Electric capacity C44 is connected between the output head anode of battery pack and negative pole, and battery pack output head anode is in series with inductance L 5 and second switch circuit successively, and the second output of second switch circuit is connected with inductance L 5; Described first switching circuit is connected between the second output of second switch circuit and battery pack negative pole of output end, and electric capacity C45 is connected between the first output of second switch circuit and battery pack negative pole of output end.
Further, the first switching circuit comprises triode Q27, diode D12, field effect transistor Q24, resistance R71 and resistance R76, and the base stage of triode Q27 is the input of the first switching circuit; Between the base stage being connected to triode Q27 after diode D12 and resistance R71 parallel connection and collector electrode, resistance R76 is in series with between the collector and emitter of triode Q27, the grid of field effect transistor Q24 connects the collector electrode of triode Q27, the source electrode of field effect transistor Q24 is connected with the emitter of triode Q27, and the drain electrode of field effect transistor Q24 and source electrode are respectively as the first output of switching circuit and the second output.
The utility model proposes a kind of monocell automation uninterrupted power supply(ups), civil power is converted to the direct voltage that load needs by this supply unit, and with the addition of monocell for subsequent use.When there being civil power, employing civil power is load supplying, is charged to battery backup by with civil power; When civil power power-off, monocell for subsequent use is that equipment is powered, and realizes zero switching uninterrupted power supply.The utility model can be used for the electric power system of every field.
Embodiment
For further illustrating each embodiment, the utility model provides accompanying drawing.These accompanying drawings are a part for the utility model disclosure, and it is mainly in order to illustrate embodiment, and the associated description of specification can be coordinated to explain the operation principles of embodiment.Coordinate with reference to these contents, those of ordinary skill in the art will be understood that other possible execution modes and advantage of the present utility model.Assembly in figure not drawn on scale, and similar element numbers is commonly used to assembly like representation class.
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
Consult shown in Fig. 1 to Fig. 4, a kind of monocell automation uninterrupted power supply(ups) of the preferred embodiment of the utility model, Fig. 1 is the structure chart of this embodiment, it comprises the electromagnetic interference filter circuit 1 connected successively, first current rectifying and wave filtering circuit 2, filter circuit 3, main switch control circuit 7, main transformer 4, second current rectifying and wave filtering circuit 5, second current rectifying and wave filtering circuit 5 exports the second direct voltage Vac-DC, second direct voltage Vac-DC feeds back to the first feedback loop 10, first feedback loop 10 connects the first pulse width control circuit 9 successively, drive transforming circuit 8, main switch control circuit 7.Filter circuit 3 is also connected with start-up circuit 21, and start-up circuit 21 provides starting resistor for the first pulse width control circuit 9.Main transformer 4 is also connected with the second auxiliary power circuit 19 respectively at the first auxiliary power circuit 20, first auxiliary power circuit 20 is powered for driving transforming circuit 8 and the first pulse width control circuit 9, and the second auxiliary power circuit 19 is powered for charging circuit 11, second pulse width control circuit 17 and driving isolation circuit 18.Charging circuit 11 charges for battery pack 12, battery pack 12 voltage is input to booster circuit 13, the 3rd direct voltage VBAT is exported after booster circuit 13 boosts, 3rd direct voltage VBAT outputs to the input of the second direct voltage Vac-DC through isolating diode 15, and the second direct voltage Vac-DC connects load.3rd direct voltage VBAT is input to second feed back loop 16, and second feed back loop 16 is connected with driving isolation circuit 18 with the second pulse width control circuit 17 successively, and driving isolation circuit 18 is connected with booster circuit 13.
Consulting shown in Fig. 2, is the schematic diagram part one of this embodiment.Electromagnetic interference filter circuit 1 comprises fuse FS1, piezo-resistance MOV1, electric capacity C5, electric capacity C11, electric capacity C9, resistance R5, resistance R8, resistance R11, common mode inductance L2 and resettable fuse RT1, is parallel with piezo-resistance MOV1 between civil power output head anode ACL and negative pole of output end ACN.Fuse FS1 is serially connected on civil power negative pole of output end ACN, and electric capacity C5 and electric capacity C8 is connected in parallel between civil power output head anode ACL and negative pole of output end ACN after connecting, and electric capacity C5 connects civil power output head anode, the link ground connection of electric capacity C5 and electric capacity C8.Be connected in parallel on together with electric capacity C9 between civil power output head anode ACL and negative pole of output end ACN after resistance R5, resistance R8 and resistance R11 connect successively, form low-pass filter circuit, filtering is carried out to mains electricity.Civil power output head anode ACL and negative pole of output end ACN connects the first winding input and the second winding input of common mode inductance L2 respectively, the first winding output of common mode inductance L2 is the output head anode of electromagnetic interference filter circuit 1 after resettable fuse RT1 exports, and the second winding output of common mode inductance L2 is as the negative pole of output end of electromagnetic interference filter circuit 1.
First current rectifying and wave filtering circuit 2 is full bridge rectifier, two outputs of two input termination electromagnetic interference filter circuit 1 of full bridge rectifier, the electric capacity C6 be parallel with between two outputs of full bridge rectifier and electric capacity C8, filter circuit 3 comprises electric capacity C6 and electric capacity C8.The negative pole of output end ground connection of full bridge rectifier.
Filter circuit 3 output head anode connects the input anode of start-up circuit 21 through resistance R4, the resistance R6 of series connection and resistance R10, start-up circuit 21 comprises electric capacity C21 and voltage stabilizing didoe ZD1, electric capacity C21 and voltage stabilizing didoe ZD1 is in parallel, filter circuit 3 output head anode is connected with the positive pole of electric capacity C21 with the negative pole of voltage stabilizing didoe ZD1, the positive pole of voltage stabilizing didoe ZD1 and the minus earth of electric capacity C21.Start-up circuit 21 provides starting resistor for the first pulse width control circuit 9.
Main switch control circuit 7 comprises field effect transistor Q2 and field effect transistor Q6, forms double tube positive exciting structure.The drain electrode of field effect transistor Q2 connects the output head anode of filter circuit 3, and field effect transistor Q2 grid connects the first output driving transforming circuit 8, and the source electrode of field effect transistor Q2 connects the first end of main transformer 4 former limit winding; The drain electrode of field effect transistor Q6 connects the second end of main transformer 4 former limit winding, and field effect transistor Q6 grid connects the second output driving transforming circuit 8.The source electrode of field effect transistor Q6, through resistance R35 ground connection, is parallel with diode D3 between the drain electrode of field effect transistor Q2 and the drain electrode of field effect transistor Q6, the positive pole of diode D3 connects the drain electrode of field effect transistor Q6.
The winding two ends, former limit of main transformer 4 are connected with main switch control circuit 7, the output of the first vice-side winding of main transformer 4 is connected with the input of the second current rectifying and wave filtering circuit 5, the output of the second vice-side winding of main transformer 4 is connected with the input of the first auxiliary power circuit 20, and the output of the 3rd vice-side winding of main transformer 4 is connected with the input of the second auxiliary power circuit 19.
Second current rectifying and wave filtering circuit 5 comprises Ultrafast recovery diode Q1, inductance L 1, first series resonant circuit and the second series resonant circuit, and the first series resonant circuit is identical with the structure of the second series resonant circuit.As shown in Figure 2, the first series resonant circuit of this embodiment is in series with electric capacity C4 after resistance R1, resistance R2 and resistance R3 parallel connection.The first end anode of Ultrafast recovery diode Q1 and second the Dragon Boat Festival pole connect output head anode and the negative pole of output end of main transformer 4 first vice-side winding respectively, be in series with the first series resonant circuit between the first end anode of Ultrafast recovery diode Q1 and negative electrode, Ultrafast recovery diode Q1 second the Dragon Boat Festival pole and negative electrode between be in series with the second series resonant circuit.The negative electrode of one termination Ultrafast recovery diode Q1 of inductance L 1, another termination second direct voltage Vac-DC input, between the junction that electric capacity C10 is connected in parallel on inductance L 1 and the second direct voltage Vac-DC input and the negative pole of output end of main transformer 4 first vice-side winding.
First feedback loop 10 inputs the second direct voltage Vac-DC, and the resistance of the first feedback loop 10 carries out dividing potential drop to the second direct voltage Vac-DC, and exports two voltage 48V-FB1 and voltage 48V-FB2 after utilizing source of stable pressure Q8 voltage stabilizing.
Voltage 48V-FB1 and voltage 48V-FB2 is input to input anode and the input cathode of the photoelectrical coupler M2 in the first pulse width control circuit 9 respectively.First pulse width control circuit 9 comprises integrated chip M1B, and start-up circuit 21 provides starting resistor for integrated chip M1B, and integrated chip M1B is used for output pulse width modulation (PulseWidthModulation is called for short PWM).The voltage 48V-FB1 that first pulse width control circuit 9 inputs according to the first feedback loop 10 and voltage 48V-FB2, control the PWM duty ratio exported, PWM output frequency is constant.Thering is provided starting resistor to the first pulse width control circuit 9 by start-up circuit 21 when city electrically connects, after civil power is stable, is that the first pulse width control circuit 9 is powered by the first auxiliary power circuit 20.
It should be noted that, the model of the integrated chip M1B of this embodiment is UC3845, and those skilled in the art are known, and the integrated chip of other models also can be adopted for exporting PWM.
First pulse width control circuit 9 exports PWM to driving transforming circuit 8, PWM controls to drive the triode Q4 of transforming circuit 8 li and the conducting of triode Q5 and cut-off, make the former limit winding input ac voltage of transformer T1, first vice-side winding of transformer T1 and the second vice-side winding output control the field effect transistor Q2 of main switch control circuit 7 li and the conducting of field effect transistor Q6 and cut-off respectively.
The input of the first auxiliary power circuit 20 is connected with the output of the second vice-side winding of main transformer 4, this first auxiliary power circuit 20 comprises the first voltage stabilizing circuit, first voltage stabilizing circuit is made up of triode Q12, resistance R39 and voltage stabilizing didoe ZD2, the negative electrode of voltage stabilizing didoe ZD2 connects the base stage of triode Q12, is in series with resistance R39 between the base stage of triode Q12 and emitter.The alternating voltage that main transformer 4 second vice-side winding exports is converted to direct voltage VCCP by the first auxiliary power circuit 20, and direct voltage VCCP powers for driving transforming circuit 8 and the first pulse width control circuit 9.
The input of the second auxiliary power circuit 19 is connected with the output of the 3rd vice-side winding of main transformer 4, this second auxiliary power circuit 19 comprises the second voltage stabilizing circuit, and this second voltage stabilizing circuit is identical with the first voltage regulator circuit structure of the first auxiliary power circuit 20 li.Second auxiliary power circuit 19 also comprises Ultrafast recovery diode Q11 and inductance L 3, two anodes of Ultrafast recovery diode Q11 are connected with negative pole of output end respectively at the output head anode of the 3rd vice-side winding of main transformer 4, and the negative electrode of Ultrafast recovery diode Q11 connects the second voltage stabilizing circuit through inductance L 3 and diode D10.The alternating voltage that main transformer 4 the 3rd vice-side winding exports is converted to direct voltage 16V and direct voltage VCCP2 by the second auxiliary power circuit 19 respectively, direct voltage VCCP2 be the second pulse width control circuit power 17 and driving isolation circuit 18 power, direct voltage 16V is that charging circuit 11 and the second pulse width control circuit 17 are powered.
Consult shown in Fig. 4, be charging circuit 11 schematic diagram of this embodiment, charging circuit 11 is connected with battery pack 12.The direct voltage 16V that input termination second auxiliary power circuit 19 that three ends can align pressurizer Q38 exports, the collector electrode of triode Q37 and the collector electrode of triode Q39 link together, three ends can align the emitter of the control termination triode Q37 of pressurizer Q38, and the control end that three ends can align pressurizer Q38 connects through resistance R105 and resistance R106 the output that three ends can align pressurizer Q38.The output that three ends can align pressurizer Q38 meets battery pack 12 positive pole BAT+, for battery pack 12 is charged through resistance R106 and diode D22.Battery pack 12 positive pole BAT+ is connected with the input anode of motion amplifier M12B respectively at operational amplifier M12A through bleeder circuit, the input cathode of operational amplifier M12A is connected with the input cathode of motion amplifier M12B, the input cathode of operational amplifier M12A and the input cathode junction of motion amplifier M12B are through source of stable pressure Q41 ground connection, the negative electrode of source of stable pressure Q41 is extremely connected with control, the plus earth of source of stable pressure Q41.According to the change in voltage of battery pack 12 positive pole BAT+ by controlling the break-make of triode Q37 and triode Q39, whether what determine that three ends can align pressurizer Q38 is that battery pack 12 is charged.
The model of source of stable pressure Q41 and source of stable pressure Q8 is TL431, and the model of operational amplifier M12 is LM2904, and the model that three ends can align pressurizer Q38 is LM317.
Consulting shown in Fig. 3, is the schematic diagram part two of this embodiment.Booster circuit 13, battery pack 12 positive pole BAT+ holds and is connected with two inputs of booster circuit 13 with battery pack 12 negative pole BAT-end, and it comprises the first switching circuit, second switch circuit, inductance L 5, resistance R77, electric capacity C44 and electric capacity C45.Wherein the first switching circuit comprises triode Q27, diode D12, field effect transistor Q24, resistance R71 and resistance R76, and the base stage of triode Q27 is the input of the first switching circuit.Between the base stage being connected to triode Q27 after diode D12 and resistance R71 parallel connection and collector electrode, resistance R76 is in series with between the collector and emitter of triode Q27, the grid of field effect transistor Q24 connects the collector electrode of triode Q27, and the source electrode of field effect transistor Q24 is connected with the emitter of triode Q27.The drain electrode of field effect transistor Q24 and source electrode are respectively as the first output of switching circuit and the second output.Second switch circuit is identical with the structure of the first switching circuit.Electric capacity C44 is connected to battery pack 12 positive pole BAT+ end and battery pack 12 negative pole BAT-holds, and the input of the first switching circuit is connected with the first output of driving isolation circuit 18, and the input of second switch circuit is connected with the second output of driving isolation circuit 18.Second of first switching circuit exports termination battery pack 12 negative pole BAT-end, first output of the first switching circuit is connected with the second output of second switch circuit, battery pack 12 positive pole BAT+ holds the first output connecing second switch circuit through inductance L 5, between the first output of second switch circuit and battery pack 12BAT-are held, be parallel with electric capacity C45.Resistance R77 mono-end is connected on the first output of the first switching circuit, and the other end is connected with the 3rd output of driving isolation circuit 18.
The first switching circuit in booster circuit 13 and the break-make of second switch circuit control by driving isolation circuit 18, realize the boost function to battery pack 12 by the break-make of the first switching circuit and second switch circuit.The voltage that booster circuit 13 exports is the 3rd direct voltage VBAT.
It should be noted that, the battery pack of this embodiment is monocell, and those skilled in the art are known, are not limited to monocell.
Isolating diode 15 is supper-fast recovery diode Q22, and two anodes of supper-fast recovery diode Q22 are all connected with the output head anode of booster circuit 13, and the negative pole of supper-fast recovery diode Q22 is connected with the input of the second direct voltage Vac-DC.
Second feed back loop 16, comprises resistance R114, resistance R132 and resistance R133, connects after resistance R132 and resistance R133 parallel connection with resistance R114, another termination the 3rd direct voltage VBAT of resistance R114.Second feed back loop 16 carries out dividing potential drop to the 3rd direct voltage VBAT, is input to the second pulse width control circuit 17 after the 3rd direct voltage VBAT dividing potential drop.
Second pulse width control circuit 17, integrated chip M11D is adopted to realize the output of PWM, the output of second feed back loop 16 is connected with the input of the second pulse width control circuit 17, and the second pulse width control circuit 17 controls the PWM duty ratio exported according to the magnitude of voltage that second feed back loop 16 inputs.The base stage of triode Q40 is connected with the base stage of triode Q42, the emitter of triode Q40 is connected with the collector electrode of triode Q42, the PWM output of integrated chip M11D is connected with the base stage of triode Q40, and the emitter of triode Q40 exports PWM as the output of the second pulse width control circuit 17.
It should be noted that, the model of the integrated chip M11D of this embodiment is UC3843, and those skilled in the art are known, and the integrated chip of other models also can be adopted for exporting PWM.
Driving isolation circuit 18, this embodiment adopts the driving isolation circuit 18 of driving chip M9D design, and wherein the model of driving chip M9D is HIP2100.This embodiment HIP2100 universal design builds an isolated drive circuit, and the PWM that the second pulse width control circuit 17 exports is as the input signal of this driving isolation circuit 18.Driving isolation circuit 18 controls the voltage of its output according to the PWM inputted, and driving isolation circuit 18 pairs of booster circuits 13 control.Driving isolation circuit 18 is for providing electric current to isolate, improving fail safe and improve noise resisting ability.
When there being civil power, the alternating current that civil power exports is through electromagnetic interference filter circuit 1 filtering, and filtered first alternating voltage is converted to the first direct voltage by the first current rectifying and wave filtering circuit 2, the filtering again of the filtered circuit 3 of the first direct voltage.Filtered first direct voltage is linked into main switch control circuit 7, and the former limit winding switch that the break-make of main switch control circuit 7 realizes being input to the first direct voltage main transformer 4 is the second alternating voltage.Second alternating voltage is the 3rd alternating voltage through the transformation output of main transformer 4, and the 3rd alternating voltage is after the rectifying and wave-filtering of the second current rectifying and wave filtering circuit 5, and output is the second direct voltage Vac-DC.Second direct voltage Vac-DC is load supplying.
Second direct voltage Vac-DC feeds back to the first feedback loop 10, first feedback loop 10 obtains voltage 48V-FB1 and voltage 48V-FB2 after carrying out process dividing potential drop to the second direct voltage Vac-DC, these two voltages are input to the first pulse width control circuit 9, first pulse width control circuit 9 exports PWM, and controls the duty ratio of PWM.The PWM that first pulse width control circuit 9 exports controls to drive transforming circuit 8, driving transforming circuit 8 by controlling the break-make of main switch control circuit 7, realizing controlling the input ac voltage of the former limit winding of main transformer 4.
Charging circuit 11 pairs of battery pack 12 are charged, and charging circuit 11 inside carries battery pack 12 voltage decision circuitry, when battery pack 12 voltage is lower than reference voltage, adopt constant current charge; When higher than reference voltage, constant float charge voltage is adopted to charge to battery pack 12.Because the voltage of battery pack 12 is lower than load required voltage, therefore adopt the output voltage of booster circuit 13 pairs of battery pack 12 to boost, voltage is raised to the 3rd DC voltage VBAT by booster circuit 13, can reach the demand of load.
Second feed back loop 16, second pulse width control circuit 17 and driving isolation circuit 18 form feedback loop, 3rd DC voltage VBAT is input in second feed back loop 16, second feed back loop 16 is input in the second pulse width control circuit 17 after carrying out dividing potential drop to the 3rd DC voltage VBAT, second pulse width control circuit 17 exports PWM, PWM is input in driving isolation circuit 18, and driving isolation circuit 18 controls booster circuit 13 pairs of battery pack 12 and boosts.The PWM duty ratio that wherein the second pulse width control circuit 17 exports determine that booster circuit 13 pairs of battery pack 12 boost number.
This embodiment when have mains electricity time, this mains voltage is by after the process of electromagnetic interference filter circuit 1, first current rectifying and wave filtering circuit 2, filter circuit 3, main transformer 4 and the second current rectifying and wave filtering circuit 5, direct current exports the second direct voltage Vac-DC and powers to external loading, supplies energy to battery pack 12 simultaneously and charges.Because the output three direct voltage VBAT of battery pack 12 after booster circuit 13 is lower than the second direct voltage Vac-DC, therefore when electric main provides energy, battery pack 12 does not provide energy because exporting the 3rd direct voltage VBAT lower than the second direct voltage Vac-DC.
When mains failure, be input to electromagnetic interference filter circuit 1 without alternating voltage, battery pack 12 for subsequent use, after booster circuit 13 boosts, carries voltage to the second direct voltage Vac-DC output by isolating diode 15, for load supplying, realize zero switching uninterrupted power supply.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.