CN106329943A - Low-voltage DC boost conversion and control circuit - Google Patents
Low-voltage DC boost conversion and control circuit Download PDFInfo
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- CN106329943A CN106329943A CN201610807027.0A CN201610807027A CN106329943A CN 106329943 A CN106329943 A CN 106329943A CN 201610807027 A CN201610807027 A CN 201610807027A CN 106329943 A CN106329943 A CN 106329943A
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3382—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement in a push-pull circuit arrangement
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
- H02M3/3385—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current
- H02M3/3387—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current in a push-pull configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a low-voltage DC boost conversion and control circuit. A clamping capacitor is introduced at a primary side, and thus, the voltage peak of a power switch transistor can be clamped at twice the input voltage, a leakage inductance switch spike caused to the traditional push-pull circuit due to low-voltage large current can be solved; a resonant capacitor is introduced at a secondary side, and thus, a soft switch for realizing on and off functions under zero voltage and zero current can be realized; and a full-bridge rectifier circuit is selected at the secondary side, and higher output voltage can be realized.
Description
Technical field
The present invention relates to a kind of low-voltage direct boosting inverter and control circuit, belong to new energy resource power battery energy conversion skill
Art field.
Background technology
Traditional balanced discharge typically uses the mode of cell parallel resistance shunting energy consumption, and can only be in charging process
In do balanced operation, unnecessary energy is depleted on energy consumption resistance, and efficiency is zero.Euqalizing current is the least simultaneously, normal conditions
Down less than 100mA, the effect to high capacity cell is negligible.
In low-voltage, high-current occasion, push-pull circuit has obtained wide with the high advantage of its simple in construction, magnetic core utilization rate
General application.But traditional push-pull circuit there is also following shortcoming in application:
(1) there is leakage inductance due to transformator primary side, power tube can produce the biggest shutoff spike when turning off；
(2) input current ripple ampere-second integration is big, thus during design, input filter component size is bigger；
(3) input primary side is monomer battery voltage, and voltage is extremely low, typically not greater than 5V, and this recommends electricity for traditional
For road, conversion efficiency is too low.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of low-voltage direct boosting inverter and control circuit.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of low-voltage direct boosting inverter and control circuit, including power transfer circuitry and control circuit；
Described power transfer circuitry includes inverter circuit, transformator and current rectifying and wave filtering circuit, the input of described inverter circuit
End is connected with the input of described low-voltage direct boosting inverter and control circuit, and described inverter circuit includes two outfans, institute
The first side winding stating transformator includes the first winding and the second winding, an outfan of described inverter circuit and the first winding
Connecting, another outfan of described inverter circuit and the second winding connect, and arrange between described first winding and the second winding
There is clamp capacitor；The input of described current rectifying and wave filtering circuit is connected with the secondary side winding of transformator, described current rectifying and wave filtering circuit
Outfan be connected with the outfan of described low-voltage direct boosting inverter and control circuit；
Described control circuit include primary side current sampling current stabilization circuit, power supply, PWM chip, photoelectric isolating circuit,
Voltage sample control circuit and output voltage mu balanced circuit；
Described primary side current sampling current stabilization circuit is in order to gather primary side current current stabilization, and described primary side current is sampled
The outfan of current stabilization circuit is connected with PWM chip input, and described voltage sample control circuit is in order to gather output voltage, described
The outfan of voltage sample control circuit is connected with the input of output voltage mu balanced circuit, described output voltage mu balanced circuit
Outfan is connected with PWM chip input by photoelectric isolating circuit, and described PWM chip controls the logical of inverter circuit breaker in middle pipe
Disconnected, described power supply is that all parts of control circuit is powered.
Described inverter circuit includes that the first parasitic capacitance, the second parasitic capacitance, inside comprise the of parasitic parallel diode
One switching tube and second switch pipe；
The drain electrode of described first switching tube is connected with the positive input terminal of described low-voltage direct boosting inverter and control circuit, institute
The negative input end of the source electrode and described low-voltage direct boosting inverter and control circuit of stating second switch pipe is connected, described first switch
The grid of pipe and second switch pipe is all connected with the outfan of PWM chip, and the two ends of described first parasitic capacitance are respectively with first
The drain electrode of switching tube and source electrode connect, and the two ends of described second parasitic capacitance are respectively with the drain electrode of second switch pipe and source electrode even
Connecing, the drain electrode of described first switching tube and the outfan as inverter circuit that drains of second switch pipe, respectively with first
The two ends connection of winding, the source electrode of described first switching tube and the source electrode of second switch pipe are as another output of inverter circuit
End, the two ends with the second winding are connected respectively.
The drain electrode of described first switching tube is by leakage inductance and described low-voltage direct boosting inverter and the positive input of control circuit
End connects, and the source electrode of described second switch pipe is negative defeated by input resistance and described low-voltage direct boosting inverter and control circuit
Enter end connect, the two ends of described input resistance all with primary side current sample current stabilization circuit input be connected.
Described low-voltage direct boosting inverter and the input of control circuit are also connected to input capacitance.
Described current rectifying and wave filtering circuit includes filter inductance, output capacitance, resonant capacitance and rectification circuit；Described rectification circuit
Including two inputs and two outfans, one end of described filter inductance is connected with one end of the secondary side winding of transformator,
The other end of described filter inductance is connected with one end of resonant capacitance, the other end of described resonant capacitance (Cr) and rectification circuit
One input connects, and another input of described rectification circuit is connected with the other end of the secondary side winding of transformator, described
Two outfans of rectification circuit respectively with described low-voltage direct boosting inverter and the positive output end of control circuit and negative output terminal
Connect, the two ends of described output capacitance respectively with described low-voltage direct boosting inverter and the positive output end of control circuit and negative output
End connects.
Described rectification circuit is full bridge rectifier.
The beneficial effect that the present invention is reached: the present invention introduces clamp capacitor at primary side, makes power switch pipe Voltage Peak
Value clamper, at the input voltage of 2 times, can solve conventional push-pull circuit leakage inductance switch spike caused by low-voltage, high-current；?
Secondary side introduces resonant capacitance, it is achieved turn on and off the Sofe Switch of function under no-voltage and zero current；Select complete at secondary side
Bridge rectification circuit, it is achieved higher output voltage.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention.
Fig. 2 is duty sequential chart of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.Following example are only used for clearly illustrating the present invention
Technical scheme, and can not limit the scope of the invention with this.
As it is shown in figure 1, a kind of low-voltage direct boosting inverter and control circuit, including power transfer circuitry and control circuit.
Power transfer circuitry includes inverter circuit, transformator T1 and current rectifying and wave filtering circuit, the input of inverter circuit and institute
The input stating low-voltage direct boosting inverter and control circuit connects, and the input of low-voltage direct boosting inverter and control circuit is also
Being connected to input capacitance Cin, inverter circuit includes two outfans, the first side winding of transformator T1 include the first winding LP1 and
Second winding LP2, an outfan of inverter circuit and the first winding LP1 connect, another outfan of inverter circuit and the
Two winding LP2 connect, and are provided with clamp capacitor C1 between the first winding LP1 and the second winding LP2.
The input of current rectifying and wave filtering circuit is connected with the secondary side winding of transformator T1, the outfan of current rectifying and wave filtering circuit with
The outfan of described low-voltage direct boosting inverter and control circuit connects.
Control circuit include primary side current sampling current stabilization circuit 1, power supply 2, PWM chip 3, photoelectric isolating circuit 4,
Voltage sample control circuit 5 and output voltage mu balanced circuit 6.Primary side current sampling current stabilization circuit 1 is in order to gather primary side electricity
Stream current stabilization, the outfan of primary side current sampling current stabilization circuit 1 is connected with PWM chip 3 input, voltage sample control circuit
5 in order to gather output voltage, and the outfan of voltage sample control circuit 5 is connected with the input of output voltage mu balanced circuit 6, defeated
The outfan going out voltage stabilizing circuit 6 is connected with PWM chip 3 input by photoelectric isolating circuit 4, and PWM chip 3 controls inversion
The break-make of circuit breaker in middle pipe, power supply 2 is that all parts of control circuit is powered.
Above-mentioned inverter circuit includes that the first parasitic capacitance Cs1, the second parasitic capacitance Cs2, inside comprise parasitic and di-pole
The first switching tube S1 and second switch pipe S2 of pipe.The drain electrode of the first switching tube S1 is by leakage inductance Lr1 and described low-voltage direct liter
Buckling is changed and the positive input terminal Vin+ of control circuit connects, and the source electrode of second switch pipe S2 is low with described by input resistance Rin
The negative input end Vin-of straightening stream boosting inverter and control circuit connects, and the two ends of input resistance Rin are all adopted with primary side current
The input of sample current stabilization circuit 1 connects, the grid of the first switching tube S1 and second switch pipe S2 all with the outfan of PWM chip 3
Connecting, the two ends of the first parasitic capacitance Cs1 are connected with drain electrode and the source electrode of the first switching tube S1 respectively, the second parasitic capacitance Cs2
Two ends be connected with drain electrode and the source electrode of second switch pipe S2 respectively, the drain electrode of the first switching tube S1 and the leakage of second switch pipe S2
Pole is as an outfan of inverter circuit, and the two ends with the first winding LP1 are connected respectively, the source electrode of the first switching tube S1 and
The source electrode of two switching tube S2 is as another outfan of inverter circuit, and the two ends with the second winding LP2 are connected respectively.
Above-mentioned current rectifying and wave filtering circuit includes filter inductance Lr2, output capacitance C2, resonant capacitance Cr and rectification circuit.Rectification
Circuit includes one end of the secondary side winding of two inputs and two outfans, one end of filter inductance Lr2 and transformator T1
Connecting, the other end of filter inductance Lr2 is connected with one end of resonant capacitance Cr, the other end of resonant capacitance Cr and rectification circuit
One input connects, and another input of rectification circuit is connected with the other end of the secondary side winding of transformator T1, rectified current
Two outfans on road are connected with described low-voltage direct boosting inverter and the positive output end of control circuit and negative output terminal respectively, defeated
Go out the two ends of electric capacity C2 to be connected with described low-voltage direct boosting inverter and the positive output end of control circuit and negative output terminal respectively.
Above-mentioned rectification circuit is full bridge rectifier, specifically includes the first diode D1, the second diode D2, the three or two pole
Pipe D3 and the 4th diode D4, the first diode D1 and the second diode D2, the 3rd diode D3 and the 4th diode D4 are respectively
After connecting according to conducting direction, parallel connection constitutes full bridge rectifier again, and the first diode D1 and the second diode D2 is connected in series
Point is an input, and being connected in series of the 3rd diode D3 and the 4th diode D4 is a little an another input, two parallel connections
Junction point is two outfans.
Above-mentioned low-voltage direct boosting inverter and control circuit create two primary circuit at primary side, particularly as follows:
Vin+ → LP1 → C1 → LP2 → Vin-constitutes a loop.Ignore the leakage inductance of Transformer Winding, then on two windings
The voltage produced is zero, it can be deduced that input voltage all loads on clamp capacitor C1, its polarity be upper negative under just.
Vin+ → S1 → C1 → S2 → Vin-constitutes a loop.According to Kirchhoff's second law it follows that Us1+
Us2=Uin+Uc1=2Uin；Wherein, Us1 and Us2 is respectively the first switching tube S1 and the drain-source pressure drop of second switch pipe S2,
Uin is input DC power voltage, and Uc1 is clamp capacitor voltage.
Owing to the terminal voltage of clamp capacitor C1 has floating property, suitable clamp capacitor value is selected i.e. to can guarantee that transformator
Magnetic flux has the symmetry magneting of equal Flux consumption and magnetic core in two half periods of same period, makes exciting curent and magnetic
Lead to and return to starting point when end cycle, the phenomenon of non DC bias.
First switching tube S1 and second switch pipe S2 was all not turned in the time, and input DC power charges to clamp capacitor C1
Form loop current, and while a switch conduction, between clamp capacitor C1 and Transformer Winding, form loop, clamper electricity
Hold C1 electric discharge.Either which switch conduction conducting, clamp capacitor C1 is a winding parallel with transformator, so pincers
Under voltage on the electric capacity C1 of position is always upper negative just, and approximate input DC power voltage Uin.And Uin, Uc1, Us1 and Us2 structure
Become a loop, Kirchhoff's second law may know that: Uin+Uc1=Us1+Us2=2Uin.As the first switching tube S1 and
When voltage that the drain-source pole of two switching tube S2 is born is reverse-biased, the diode current flow of reverse parallel connection the most therewith, drain-source voltage clamps
Position is at 0V.Due to the first switching tube S1 and second switch pipe S2 alternate conduction, therefore the first switching tube S1 or second switch pipe S2 exists
The maximum voltage stress born in work process is 2Uin, therefore adds clamp capacitor C1 and can effectively suppress the voltage of switching tube
Spike, optimizes the selection of power tube, improves the conversion efficiency of circuit.
Above-mentioned low-voltage direct boosting inverter and the control circuit resonant capacitance Cr in secondary side circuit, it is achieved no-voltage and
Turning on and off the Sofe Switch of function under zero current, filter inductance Lr2 also assists in resonance, and design parameter is determined by experiment, as
Fruit is the biggest needs extra resonance inductance.
Resonant capacitance Cr is calculated by following formula:
Wherein, fs is switch operating frequency.
Mode of operation as shown in Figure 2, it is achieved Sofe Switch function:
A.[0-t1] the first switching tube S1 turns under no-voltage, by filter inductance Lr2, resonant capacitance Cr resonance, when
When flowing through the current resonance on the first switching tube S1 to zero, the first switching tube S1 realizes turning off under zero current.
B.[t1-t2] the first switching tube S1 cut-off and second switch pipe S2 be not when also turning on, swash by transformator is remaining
Magnetoelectricity stream, makes the tension discharge in the first parasitic capacitance Cs1 to zero.
C.[t2-t3] second switch pipe S2 turns under no-voltage, by filter inductance Lr2, resonant capacitance Cr resonance, when
When flowing through the current resonance of second switch pipe S2 to zero, anti-parallel diodes realizes switch off current.
D.[t3-t4] second switch pipe S2 turns off and the first switching tube S1 does not also turn on, remaining excitatory by transformator
Electric current, makes the second parasitic capacitance Cs2 charge to 2Vin, and the tension discharge of clamp capacitor C1 is to zero simultaneously.
Above-mentioned low-voltage direct boosting inverter and the low-voltage DC of control circuit primary side input, boost through transformator T1
The pulse direct current of rear generation alternation, through the rectifying and wave-filtering of current rectifying and wave filtering circuit, just obtains stable straight at circuit output end
Stream High voltage output.
PWM chip 3 exports (now output is low level to second switch pipe S2) when the first switching tube S1 is high level,
The secondary windings top of transformator T1 is just, is negative below；PWM chip 3 output to second switch pipe S2 be high level time (now
Exporting the first switching tube S1 is low level), the secondary windings top of transformator T1 is negative, is just below.Due to the first switch
Pipe S1 and second switch pipe S2 works continuously, and the secondary windings of transformator T1 produces the unidirectional current of alternation, then passes through rectifying and wave-filtering
Just obtain VD.The direct current signal exported by voltage sample control circuit 5 and output voltage mu balanced circuit 6 delivers to light
Electric isolating circuit 4, give PWM chip 3 through isolation conversion, adjust the dutycycle of output control signal, and then adjust inversion
The output waveform of circuit.
Foregoing circuit introduces clamp capacitor C1 at primary side, makes power switch pipe voltage peak clamper electric the input of 2 times
Pressure, can solve conventional push-pull circuit leakage inductance switch spike caused by low-voltage, high-current；Resonant capacitance is introduced at secondary side
Cr, it is achieved turn on and off the Sofe Switch of function under no-voltage and zero current；Full bridge rectifier is selected, it is achieved more at secondary side
High output voltage.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and deformation, these improve and deformation
Also should be regarded as protection scope of the present invention.
Claims (6)
1. a low-voltage direct boosting inverter and control circuit, it is characterised in that: include power transfer circuitry and control circuit；
Described power transfer circuitry includes inverter circuit, transformator (T1) and current rectifying and wave filtering circuit, the input of described inverter circuit
End is connected with the input of described low-voltage direct boosting inverter and control circuit, and described inverter circuit includes two outfans, institute
The first side winding stating transformator (T1) includes the first winding (LP1) and the second winding (LP2), and one of described inverter circuit defeated
Go out end to be connected with the first winding (LP1), another outfan of described inverter circuit and the second winding (LP2) connection, described the
Clamp capacitor (C1) it is provided with between one winding (LP1) and the second winding (LP2)；The input of described current rectifying and wave filtering circuit and change
The secondary side winding of depressor (T1) connects, the outfan of described current rectifying and wave filtering circuit and described low-voltage direct boosting inverter and control
The outfan of circuit connects；
Described control circuit includes primary side current sampling current stabilization circuit (1), power supply (2), PWM chip (3), Phototube Coupling
Circuit (4), voltage sample control circuit (5) and output voltage mu balanced circuit (6)；
Described primary side current sampling current stabilization circuit (1) is in order to gather primary side current current stabilization, and described primary side current is sampled
The outfan of current stabilization circuit (1) is connected with PWM chip (3) input, and described voltage sample control circuit (5) is in order to gather output
Voltage, the outfan of described voltage sample control circuit (5) is connected with the input of output voltage mu balanced circuit (6), described defeated
The outfan going out voltage stabilizing circuit (6) is connected with PWM chip (3) input by photoelectric isolating circuit (4), described PWM core
Sheet (3) controls the break-make of inverter circuit breaker in middle pipe, and described power supply (2) is that all parts of control circuit is powered.
A kind of low-voltage direct boosting inverter the most according to claim 1 and control circuit, it is characterised in that: described inversion electricity
Road includes the first switching tube that the first parasitic capacitance (Cs1), the second parasitic capacitance (Cs2), inside comprise parasitic parallel diode
And second switch pipe (S2) (S1)；
Drain electrode and described low-voltage direct boosting inverter and the positive input terminal (Vin+) of control circuit of described first switching tube (S1)
Connect, the source electrode of described second switch pipe (S2) and described low-voltage direct boosting inverter and the negative input end (Vin-) of control circuit
Connecting, the grid of described first switching tube (S1) and second switch pipe (S2) all outfans with PWM chip (3) are connected, described
The two ends of the first parasitic capacitance (Cs1) are connected with drain electrode and the source electrode of the first switching tube (S1) respectively, described second parasitic capacitance
(Cs2) two ends are connected with drain electrode and the source electrode of second switch pipe (S2) respectively, the drain electrode of described first switching tube (S1) and
The drain electrode of two switching tubes (S2) is as an outfan of inverter circuit, and the two ends with the first winding (LP1) are connected respectively, described
The source electrode of the first switching tube (S1) and the source electrode of second switch pipe (S2) are as another outfan of inverter circuit, respectively with
The two ends of two windings (LP2) connect.
A kind of low-voltage direct boosting inverter the most according to claim 2 and control circuit, it is characterised in that: described first opens
The drain electrode closing pipe (S1) is connected by the positive input terminal (Vin+) of leakage inductance (Lr1) with described low-voltage direct boosting inverter and control circuit
Connecing, the source electrode of described second switch pipe (S2) is by input resistance (Rin) and described low-voltage direct boosting inverter and control circuit
Negative input end (Vin-) connect, the two ends of described input resistance (Rin) all with primary side current sample current stabilization circuit (1) defeated
Enter end to connect.
A kind of low-voltage direct boosting inverter the most according to claim 1 and control circuit, it is characterised in that: described low-pressure direct
Flow boosting inverter and the input of control circuit and be connected to input capacitance (Cin).
A kind of low-voltage direct boosting inverter the most according to claim 1 and control circuit, it is characterised in that: described rectification is filtered
Wave circuit includes filter inductance (Lr2), output capacitance (C2), resonant capacitance (Cr) and rectification circuit；
Described rectification circuit includes two inputs and two outfans, one end of described filter inductance (Lr2) and transformator
(T1) one end of secondary side winding connects, and the other end of described filter inductance (Lr2) is connected with one end of resonant capacitance (Cr),
The other end of described resonant capacitance (Cr) is connected with an input of rectification circuit, another input of described rectification circuit with
The other end of the secondary side winding of transformator (T1) connects, two outfans of described rectification circuit respectively with described low-voltage direct
Boosting inverter and the positive output end of control circuit and negative output terminal connect, and the two ends of described output capacitance (C2) are low with described respectively
Straightening stream boosting inverter and the positive output end of control circuit and negative output terminal connect.
A kind of low-voltage direct boosting inverter the most according to claim 5 and control circuit, it is characterised in that: described rectified current
Road is full bridge rectifier.
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| CN201610807027.0A CN106329943A (en) | 2016-09-07 | 2016-09-07 | Low-voltage DC boost conversion and control circuit |
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| CN201610807027.0A CN106329943A (en) | 2016-09-07 | 2016-09-07 | Low-voltage DC boost conversion and control circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271930A (en) * | 2020-11-16 | 2021-01-26 | 北方工业大学 | Secondary side resonance type LLC converting circuit |
| CN112491291A (en) * | 2019-09-12 | 2021-03-12 | 昱能科技股份有限公司 | On-off control method, device, equipment and medium for grid-connected inverter circuit |
| CN113315384A (en) * | 2021-06-16 | 2021-08-27 | 中南大学 | Complementary active clamping soft switch push-pull converter and modulation method thereof |
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| CN112491291B (en) * | 2019-09-12 | 2022-04-26 | 昱能科技股份有限公司 | On-off control method, device, equipment and medium for grid-connected inverter circuit |
| CN112271930A (en) * | 2020-11-16 | 2021-01-26 | 北方工业大学 | Secondary side resonance type LLC converting circuit |
| CN112271930B (en) * | 2020-11-16 | 2022-03-25 | 北方工业大学 | Secondary side resonance type LLC converting circuit |
| CN113315384A (en) * | 2021-06-16 | 2021-08-27 | 中南大学 | Complementary active clamping soft switch push-pull converter and modulation method thereof |
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Application publication date: 20170111 |