CN208424214U - High voltage flyback converter - Google Patents
High voltage flyback converter Download PDFInfo
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- CN208424214U CN208424214U CN201821107292.9U CN201821107292U CN208424214U CN 208424214 U CN208424214 U CN 208424214U CN 201821107292 U CN201821107292 U CN 201821107292U CN 208424214 U CN208424214 U CN 208424214U
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Abstract
The utility model provides a kind of high voltage flyback converter circuit, it include: at least identical supply convertor armature winding unit of two-stage and equalizing capacitance, every grade of armature winding unit by identical armature winding, control the switching tube of the armature winding on-off and identical compensation circuit forms, its connection relationship is, input terminal of the one end of armature winding as armature winding unit, the other end of armature winding arrives the conductive outflow end of switching tube behind the conductive inflow end of switching tube, compensated circuit on one side again, output end of the other end of compensation circuit as armature winding unit；The control terminal of each switching tube is added with synchronous driving signal, and the other end of each synchronized signal is connected to the output end of armature winding unit, and all armature windings are the same as phase control and total magnetic core；Each armature winding unit is serially connected, and each equalizing capacitance is serially connected；The series connection point of each armature winding unit is connected to form corresponding circuit with the pressure series connection point of each equalizing capacitance.
Description
Technical field
The utility model relates to a kind of high voltage converter circuit, in particular to a kind of DC-DC or DC-AC converter it is defeated
Enter series circuit.
Background technique
In recent years, with the rapid development of the power industries such as photovoltaic power generation, EHV transmission, the input electricity of distribution system
Pressure is very high, and up to several kilovolts, existing conventional converter is difficult have suitable injectron to meet design requirement, for solution
The certainly excessively high problem of switch tube voltage stress can input concatenated circuit structure using converter.
Fig. 1 is the well known high voltage eclipsed form flyback DC-DC converter circuit structure with automatically equalizing voltage function of one kind,
The circuit structure is published in " the high pressure resistant eclipsed form flyback DC-DC converter design " of " electrotechnics magazine " the 5th phase in 2001.
The circuit diagram of well known high pressure resistant eclipsed form flyback converter (can be also simply referred to as high voltage flyback converter)
As shown in Figure 1, a kind of high voltage flyback converter, including input circuit and output circuit, input circuit include that two-stage series connection connects
The identical armature winding unit and pressure unit connect, every grade of armature winding unit primary in parallel with pressure unit, at different levels
Winding element is serially connected, and pressure unit at different levels is serially connected.Wherein, the pressure unit of the first order is made of capacitor C1；The
The pressure unit of second level is made of capacitor C2；The armature winding unit of the first order includes armature winding N1 and switching tube Q1, primary
Input terminal of the one end of winding N1 as first order armature winding unit, the other end connection switch pipe Q1's of armature winding N1 leads
Galvanization flows into end, output end of the conducting electric current outflow end of switching tube Q1 as first order armature winding unit.The second level
Armature winding unit includes armature winding N2 and switching tube Q2, and one end of armature winding N2 is as second level armature winding unit
Input terminal, the conducting electric current of the other end connection switch pipe Q2 of armature winding N2 flow into end, the conducting electric current outflow of switching tube Q2
Hold the output end as second level armature winding unit.I.e. input circuit is two-stage series connection connection structure, input circuits at different levels
Structure is identical, includes armature winding unit and pressure unit, and armature winding units at different levels include armature winding and switching tube,
Armature winding connects to form series arm with switching tube, and equalizing capacitance is in parallel with the series arm.Chopped-off head armature winding unit
Input terminal connects the positive voltage terminal of DC voltage, and the output end of final stage armature winding unit passes through the resistance R0 for current sample
The control terminal of ground connection, each switching tube applies synchronous driving signal, and armature windings at different levels are the same as phase control and total magnetic core.
The well known circuit structure, the difference is that, the high pressure resistant eclipsed form is anti-with the transformation of general single-ended reverse exciting
The armature winding of exciting converter circuit is divided into identical two parts, i.e. armature winding N1 and armature winding N2, it is primary around
Group N1 and N2 is controlled on-off by switching tube Q1 and Q2 respectively, and switching tube Q1 is applied with synchronous driving signal with the grid of Q2.
In this way, switching tube Q1, Q2 are open-minded simultaneously under the conditions of ideal operation, simultaneously turn off, and because of the consistency of armature winding N1, N2, A
The current potential of point is pressed.Although the circuit can solve the excessively high problem of switch tube voltage stress, which is applied to
When product, there are many reliabilities.Because of the driving of the cut-in voltage and two switching tubes of two switching tubes
Signal, it is impossible to it is perfect consistent, there are many uncontrollable differences, this certainly will will lead to the power switch tube in the circuit structure
Opening for Q1, Q2 is asynchronous with shutdown, once it is asynchronous, there will be following problem:
One, as shown in Fig. 2, when switching tube opens inconsistent, it is assumed that switching tube Q1 is first open-minded, just capacitor C1 at this time
End voltage Vc1 is greater than the end voltage Vc2 of capacitor C2 again, since switching tube Q2 is not also open-minded, at this point, the polarity of armature winding N2 is
On it is just lower negative, the normal shock voltage V2 of armature winding N2 induction will be greater than Vc2, and normal shock voltage V2 passes through the body diode of switching tube Q2
It charging to capacitor C2 normal shock, this normal shock electric current is very big, a very big negative voltage can be generated on current sampling resistor R0, this
It will affect control IC normal sample, cause the consistency for crossing flow point when product batch very poor.
Two, as shown in figure 3, when switching tube shutdown is inconsistent, before switching tube Q1, Q2 shutdown, at the beginning of two of transformer
Grade winding N1, N2 store energy, and the gross energy of storage isAssuming that switching tube Q1 is first turned off at this time,
Due to switching tube Q2 or on state, secondary diode appoints so cut-off, the transformer storage known to law of conservation of energy
The energy deposited is constant, and armature winding N1 is because switching tube Q1 has been turned off, no current, does not also just have energy, and therefore, transformer is all
Storage energy be all added on armature winding N2, beBy J2=J obtains I2=2I, that is to say, that
When switching tube Q1 is first turned off, switching tube Q2 will bear twice of inductive current, after actual product is carried out, it is this successively turn off it is suitable
The problem of sequence also just secures, and works long hours, and it is uneven just to will appear switching tube fever, the reliabilities such as aircraft bombing, moreover, actually answering
With the product of the circuit structure, often input voltage is all very high, the more than two-stage of series of connecting, more than two switches in circuit
Pipe, switching tube is more, and this problem is more serious, and product reliability is lower.Wherein ALFor the inductance coefficent of transformer, N is primary
The circle number of winding N1 or N2, I are the electric current that transformer primary is flowed through when switching tube Q1, Q2 are simultaneously turned on, I2For switching tube Q1
After shutdown, the electric current in the circuit switching tube Q2 is flowed through.
In the prior art, for problem one, there is following solution, as shown in figure 4, in pressure A point to transformer T1's
Series resistance R1 in conducting wire between midpoint, when switching tube is opened it is inconsistent when, as shown in figure 5, be connected afterwards winding induction
Normal shock voltage can be by increased series resistance R1 to capacitor charging, and resistance R1 plays the role of current limliting, so that normal shock is electric
Stream can't be very big, to not influence the current sample of control chip, and the increased resistance R1 of institute, resistance value should be the bigger the better.
But for problem two, as shown in fig. 6, when switching tube shutdown is inconsistent, since the electric current of inductance is cannot to dash forward
Become, then resistance R1, does not have the effect of current limliting not only, can generate very big power consumption on resistance R1 instead is P=
I2 2*R1, and after product is carried out, this sequence successively turned off just secures, and works long hours, and resistance R1 will be serious because generating heat
And damage, product failure being eventually led to, and windings in series series is more in the circuit structure, the concatenated switching tube of institute is more, this
Kind problem is more serious, and product reliability is lower.
Therefore, it is necessary to be improved to the prior art.
Utility model content
In view of this, the technical problems to be solved in the utility model is to provide a kind of higher high voltage flyback change of reliability
Parallel operation.
In order to solve the above technical problems, the utility model is realized by following technical measures:
A kind of high voltage flyback converter, including input circuit, input circuit include the armature winding unit of at least two-stage
And pressure unit, every grade of armature winding unit is in parallel with pressure unit, and armature winding unit at different levels is serially connected, at different levels
Pressure unit is serially connected；The positive voltage terminal of the input terminal connection DC voltage of chopped-off head armature winding unit, final stage armature winding
The output end of unit is grounded；Every grade of armature winding unit includes armature winding and switching tube, and one end of armature winding is as just
The conducting electric current of the input terminal of grade winding element, the other end connection switch pipe of armature winding flows into end；Wherein, armature winding list
Member, further includes feedback branch, and feedback branch includes the secondary windings and compensation circuit of isolation drive transformer, secondary windings it is same
The control terminal of name end and switching tube connects, and one end of the different name end of secondary windings and compensation circuit connects, compensation circuit it is another
End is connect with the conducting electric current outflow end of switching tube.
Preferably, the compensation circuit, is made of first resistor；The pressure unit, is made of capacitor.
Preferably, the compensation circuit, is made of first resistor；The pressure unit, by capacitor parallel connection second resistance group
At.
Preferably, the switching tube is metal-oxide-semiconductor, and it is the drain electrode of metal-oxide-semiconductor that the conducting electric current of switching tube, which flows into end,；Switching tube
Conducting electric current outflow end, be the source electrode of metal-oxide-semiconductor.
Preferably, the switching tube is triode, and it is the collector of triode that the conducting electric current of switching tube, which flows into end,；It opens
The conducting electric current outflow end for closing pipe, is the emitter of triode.
Preferably, the control terminal of the switching tube of the armature winding unit at different levels applies synchronous driving signal, at different levels
Armature winding is the same as phase control and total magnetic core.
The utility model also provides a kind of high voltage flyback converter, including input circuit, and input circuit includes at least two
The armature winding unit and first capacitor of grade, every grade of armature winding unit is in parallel with first capacitor, armature winding list at different levels
Member is serially connected, and first capacitor at different levels is serially connected；The positive electricity of the input terminal connection DC voltage of chopped-off head armature winding unit
Pressure side, the output end ground connection of final stage armature winding unit；Every grade of armature winding unit includes armature winding and metal-oxide-semiconductor, primary
Input terminal of the one end of winding as armature winding unit, the drain electrode of the other end connection metal-oxide-semiconductor of armature winding；Wherein, primary
Winding element further includes feedback branch, and feedback branch includes the secondary windings and first resistor of isolation drive transformer, it is secondary around
The Same Name of Ends of group and the grid of metal-oxide-semiconductor connect, and one end of the different name end of secondary windings and first resistor connects, first resistor it is another
The connection of the source electrode of one end and metal-oxide-semiconductor.
Preferably, the control terminal of the metal-oxide-semiconductor of the armature winding unit at different levels applies synchronous driving signal, and at different levels is first
Grade winding is the same as phase control and total magnetic core.
Relational language is explained:
The control terminal of switching tube: control switch conducting and the port of cut-off refer to the grid of metal-oxide-semiconductor such as metal-oxide-semiconductor
Pole；For triode, the base stage of triode is referred to.
The conducting electric current of switching tube flows into end: after switch conduction, the port that electric current flows into refers to such as metal-oxide-semiconductor
The drain electrode of metal-oxide-semiconductor, no matter N-channel, P-channel, enhanced or depletion type MOS tube, conducting when, electric current is all high by voltage
Drain electrode flows to the low source electrode of voltage；For triode, the collector of triode is referred to, in conducting, electric current is by voltage height
Collector flow to the low emitter of voltage.
The conducting electric current outflow end of switching tube: after switch conduction, the port of electric current outflow refers to such as metal-oxide-semiconductor
The source electrode of metal-oxide-semiconductor；For triode, the emitter of triode is referred to.
As described above, a kind of high voltage flyback converter circuit disclosed by the utility model, including input circuit, input electricity
Road includes: at least identical supply convertor armature winding unit of two-stage and equalizing capacitance, and every grade of armature winding unit is by identical
Armature winding, the switching tube and identical feedback branch composition that control the armature winding on-off, connection relationship is, it is primary around
The other end of input terminal of the one end of group as armature winding unit, armature winding arrives after the conducting electric current of switching tube flows into end
The conducting electric current outflow end of switching tube, then one end of compensated circuit, the other end of compensation circuit is as armature winding unit
Output end；The control terminal of each switching tube added with synchronous driving signal, the other end of each synchronized signal be connected to it is primary around
The output end of group unit, all armature windings are the same as phase control and total magnetic core；Each armature winding unit is serially connected, each equalizing capacitance
It is serially connected；The series connection point of each armature winding unit is connected to be formed corresponding time with the pressure series connection point of each equalizing capacitance
Road, the utility model carry out driving compensation by compensation circuit in each switch periods, allow switching tube at different levels as far as possible
It opens and turns off simultaneously, be resolved so that switching tubes at different levels be made to open the problem inconsistent with shutdown, make the reliability of product
It is higher.
Compared with prior art, the utility model high voltage flyback converter has the following beneficial effects:
1, this programme introduces compensation circuit, keeps all switching tubes open-minded simultaneously as far as possible, solves more in existing scheme
A switching tube, which is opened, inconsistent causes product batch to cross the big problem of flow point difference；
2, this programme introduces compensation circuit, simultaneously turns off all switching tubes also as far as possible, solves in existing scheme
The shutdown of multiple switch pipe is inconsistent cause switching tube fever uneven and the problem of aircraft bombing；
3, the compensation circuit of the utility model high voltage flyback converter can be a resistance, and increase device is seldom, at
This low and easily designed, high reliablity.
Detailed description of the invention
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
Fig. 1 is the schematic diagram of the high voltage flyback converter circuit of existing well-known technique；
Fig. 2 is current loop of the high voltage flyback converter circuit of existing well-known technique when switching tube opens inconsistent
Figure；
Fig. 3 is current loop of the high voltage flyback converter circuit of existing well-known technique when switching tube turns off inconsistent
Figure；
Fig. 4 is the schematic diagram of the high voltage flyback converter circuit of existing improved technology；
Fig. 5 is current loop of the high voltage flyback converter circuit of existing improved technology when switching tube opens inconsistent
Figure；
Fig. 6 is current loop of the high voltage flyback converter circuit of existing improved technology when switching tube turns off inconsistent
Figure；
Fig. 7 is the first embodiment circuit diagram of the high voltage flyback converter of the utility model；
Fig. 8 is electricity of the first embodiment of the high voltage flyback converter of the utility model when switching tube opens inconsistent
Flow loop diagram；
Fig. 9 is electricity of the first embodiment of the high voltage flyback converter of the utility model when switching tube turns off inconsistent
Flow loop diagram；
Figure 10 is the second embodiment circuit diagram of the high voltage flyback converter of the utility model.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, further to the utility model in order to which the utility model is more clearly understood
It is described in detail.It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit this
Utility model.
First embodiment
It is illustrated in figure 7 the circuit diagram of the high voltage flyback converter of the utility model first embodiment, Yi Zhonggao
Pressure-resistant flyback converter, circuit composition include: input circuit and output circuit, and input circuit includes the phase of two-stage series connection connection
The armature winding unit and pressure unit of same supply convertor, every grade of armature winding unit is in parallel with pressure unit, at different levels
Armature winding unit be serially connected, pressure unit at different levels is serially connected；The input terminal connection of chopped-off head armature winding unit is straight
The positive voltage terminal of galvanic electricity pressure, the output end ground connection of final stage armature winding unit.
Pressure unit is made of capacitor, and in the present embodiment, the pressure unit of two-stage is respectively capacitor C1 and capacitor C2.
In other embodiments, pressure unit can be also made of a capacitor resistance in parallel, to realize the same or similar function.
The armature winding unit of the first order includes the secondary windings of armature winding N1, metal-oxide-semiconductor Q1, isolation drive transformer
Secondary windings T2-1 and resistance the R11 composition of T2-1 and resistance R11 for Compensation Feedback, isolation drive transformer are connected to
Feedback branch between the grid and source electrode of metal-oxide-semiconductor Q1, wherein one end of armature winding N1 is as first order armature winding unit
Input terminal, one end of the drain electrode of the other end connection metal-oxide-semiconductor Q1 of armature winding N1, the source electrode of metal-oxide-semiconductor Q1 and resistance R11 connects
It connects, the different name end of the secondary windings T2-1 of the other end and isolation drive transformer of resistance R11 is connect, and as first order primary
The Same Name of Ends of the output end of winding element, the secondary windings T2-1 of isolation drive transformer is connect with the grid of metal-oxide-semiconductor Q1.
The armature winding unit of the second level includes the secondary windings of armature winding N2, metal-oxide-semiconductor Q2, isolation drive transformer
Secondary windings T2-2 and resistance the R12 composition of T2-2 and resistance R12 for Compensation Feedback, isolation drive transformer are connected to
Feedback branch between the grid and source electrode of metal-oxide-semiconductor Q2, wherein one end of armature winding N2 is as second level armature winding unit
Input terminal, one end of the drain electrode of the other end connection metal-oxide-semiconductor Q2 of armature winding N2, the source electrode of metal-oxide-semiconductor Q2 and resistance R12 connects
It connects, the different name end of the secondary windings T2-2 of the other end and isolation drive transformer of resistance R12 is connect, and as second level primary
The Same Name of Ends of the output end of winding element, the secondary windings T2-2 of isolation drive transformer is connect with the grid of metal-oxide-semiconductor Q2.
Generally speaking, armature winding units at different levels include armature winding, metal-oxide-semiconductor and feedback branch, feedback branch by every
Secondary windings and compensation circuit composition, compensation circuit from driving transformer are made of a resistance；Every grade of armature winding unit
In, armature winding connects to form series arm with metal-oxide-semiconductor, and equalizing capacitance is in parallel with the series arm.Chopped-off head armature winding unit
Input terminal connection DC voltage positive voltage terminal, the output end ground connection of final stage armature winding unit, the grid of each metal-oxide-semiconductor applies
Synchronous driving signal, armature windings at different levels are the same as phase control and total magnetic core.
The high voltage flyback converter of the utility model, every grade of armature winding unit include identical armature winding N1 (N2)
And control the metal-oxide-semiconductor Q1 (Q2) of the armature winding on-off and the compensation resistance R11 (R12) of similar resistance, each armature winding unit
It is serially connected, each equalizing capacitance is serially connected, the pressure series connection point phase of the series connection point and each equalizing capacitance of each armature winding unit
Connection forms corresponding circuit, i.e. capacitor C1 formation first order input circuit in parallel with first order winding element, capacitor C2
The formation second level in parallel with second level winding element input circuit.From circuits at different levels independently from the point of view of, electric current from DC voltage just
After voltage end Vg outflow, the circuit of the first order is formed through armature winding N1, metal-oxide-semiconductor Q1, resistance R11 and capacitor C1；Through primary around
Group N2, metal-oxide-semiconductor Q2, resistance R12 and capacitor C2 form the circuit of the second level.If on the whole from input circuit, electric current is from straight
After the positive voltage terminal Vg outflow of galvanic electricity pressure, after the armature winding N1 of the first order, metal-oxide-semiconductor Q1 and resistance R11, then through the second level
The negative voltage side of DC voltage is returned to after armature winding N2, metal-oxide-semiconductor Q2 and resistance R12.
It should be noted that the compensation resistance in armature winding units at different levels is made of the resistance of a resistance value very little, in function
In the different circuit of rate grade, the value for compensating resistance is slightly different, and power hour, electric current is small, this resistance is corresponding
Value is relatively slightly bigger, such as 1 ohm；When power is big, electric current is big, this resistance value very little is just enough, such as 0.1 ohm
's.Therefore, for input voltage, compensating the voltage that resistance is got can ignore, so not influencing the electric current in loop of power circuit
Variation.
For brevity, with the resistance R0 of independent current sample function in circuit, due to its working principle is that known
Common sense, and with the utility model without synergistic effect.Therefore, the following analytic explanation omitted to current sampling resistor R0.Band
The circuit arrangement of current sampling resistor R0, can be on the basis of the working principle of the utility model specific embodiment, by simply tying
Conjunction also can be obtained.
The working principle of the utility model high voltage flyback converter is as follows:
As shown in figure 8, when two metal-oxide-semiconductors open inconsistent, it is assumed that metal-oxide-semiconductor Q1 is first open-minded, just the end electricity of capacitor C1
Pressure Vc1 is greater than the end voltage Vc2 of capacitor C2 again, since metal-oxide-semiconductor Q2 is not also open-minded, at this point, the secondary of isolation drive transformer around
The polarity of group T2-2 be it is upper just lower negative, the polarity of armature winding N2 is upper just lower negative, the normal shock voltage V2 of armature winding N2 induction
It will be greater than the end voltage Vc2 of capacitor C2, normal shock voltage V2 is formed by the body diode of capacitor C2, resistance R12 and metal-oxide-semiconductor Q2
Circuit, charge to capacitor C2 normal shock, this normal shock electric current is very big.Simultaneously as the polarity of resistance R12 be it is upper it is negative under just, normal shock
Electric current can generate the offset voltage of one with the pole reversal of the driving voltage of metal-oxide-semiconductor Q2 on resistance R12, make resistance R12 with
Secondary windings T2-2 formation is forward connected, to pass through the feedback of resistance R12 and the secondary windings T2-2 of isolation drive transformer
This offset voltage is added to the grid of metal-oxide-semiconductor Q2 by branch together with driving voltage, and moment draws high the driving of metal-oxide-semiconductor Q2 grid
Voltage keeps metal-oxide-semiconductor Q2 moment open-minded, thus make as far as possible metal-oxide-semiconductor Q1, Q2 simultaneously it is open-minded, solve two metal-oxide-semiconductors open it is different
Cause causes product batch to cross the big problem of flow point difference.
As shown in figure 9, when two metal-oxide-semiconductor shutdowns are inconsistent, it is assumed that metal-oxide-semiconductor Q1 is first turned off, can by law of conservation of energy
Know, all storage energy of transformer are all added on armature winding N2, this moment, the secondary windings of isolation drive transformer
For the polarity of T2-2 to be upper just lower negative, armature winding N2 increases the electric current moment for the armature winding unit for flowing through metal-oxide-semiconductor Q2, increases
Electric current make in the polarity of resistance R12 just lower negative, i.e., the polarity of one with metal-oxide-semiconductor Q2 driving voltage are generated on resistance R12
Feedback voltage in the same direction makes resistance R12 and secondary windings T2-2 form differential concatenation, to pass through resistance R12 and isolation drive
This offset voltage is added to metal-oxide-semiconductor Q2 by the feedback branch of the secondary windings T2-2 of transformer together with the voltage of driving signal
Grid when, moment drags down the driving voltage of metal-oxide-semiconductor Q2 grid, turns off metal-oxide-semiconductor Q2 moment, to make metal-oxide-semiconductor as far as possible
Q1, Q2 are simultaneously turned off, and solving the problems, such as that two metal-oxide-semiconductor shutdowns are inconsistent causes metal-oxide-semiconductor fever uneven and aircraft bombing, to eliminate unreasonably
Think circuit control Problem of Failure caused by the uncontrollable factor under operating condition, ensure that metal-oxide-semiconductor can be stablized, reliably work,
And then the reliability of product is improved, guarantee the fault-free duration of product.And the utility model need to only increase a resistance, increase device
Part is seldom, at low cost, and easily designed, high reliablity.
Second embodiment
It is as shown in Figure 10 the circuit diagram of the high voltage flyback converter of the utility model second embodiment, with Fig. 7
The difference is that the present embodiment includes: the identical supply convertor armature winding unit of N (N >=2) grade and equalizing capacitance, series connection
The working principle of circuit is as first embodiment, it can be achieved that equivalent efficacy after superposition.
The embodiments of the present invention is without being limited thereto, according to the above content of the utility model, utilizes the general of this field
Logical technological know-how and customary means have in the utility model under the premise of not departing from the utility model above-mentioned basic fundamental thought
Body implementing circuit can also make the modification, replacement or change of other diversified forms, all fall within the utility model rights protection model
Within enclosing.
Claims (8)
1. a kind of high voltage flyback converter, including input circuit, input circuit include at least two-stage armature winding unit and
Pressure unit, every grade of armature winding unit is in parallel with pressure unit, and armature winding unit at different levels is serially connected, and at different levels is equal
Pressure unit is serially connected；The positive voltage terminal of the input terminal connection DC voltage of chopped-off head armature winding unit, final stage armature winding list
The output end ground connection of member；Every grade of armature winding unit includes armature winding and switching tube, and one end of armature winding is as primary
The conducting electric current of the input terminal of winding element, the other end connection switch pipe of armature winding flows into end, it is characterised in that:
Armature winding unit, further includes feedback branch, and feedback branch includes the secondary windings and compensation electricity of isolation drive transformer
Road, the Same Name of Ends of secondary windings and the control terminal of switching tube connect, and the different name end of secondary windings and one end of compensation circuit connect,
The other end of compensation circuit and the conducting electric current outflow end of switching tube connect.
2. high voltage flyback converter according to claim 1, it is characterised in that: the compensation circuit, by first resistor
Composition；The pressure unit, is made of capacitor.
3. high voltage flyback converter according to claim 1, it is characterised in that: the compensation circuit, by first resistor
Composition；The pressure unit is made of capacitor parallel connection second resistance.
4. high voltage flyback converter according to claim 2 or 3, it is characterised in that: the switching tube is metal-oxide-semiconductor, opens
The conducting electric current for closing pipe flows into end, is the drain electrode of metal-oxide-semiconductor；The conducting electric current outflow end of switching tube is the source electrode of metal-oxide-semiconductor.
5. high voltage flyback converter according to claim 2 or 3, it is characterised in that: the switching tube is triode,
The conducting electric current of switching tube flows into end, is the collector of triode；The conducting electric current outflow end of switching tube is the transmitting of triode
Pole.
6. high voltage flyback converter according to claim 1, it is characterised in that: the armature winding unit at different levels is opened
The control terminal for closing pipe applies synchronous driving signal, and armature winding at different levels is the same as phase control and total magnetic core.
7. a kind of high voltage flyback converter, including input circuit, input circuit include at least two-stage armature winding unit and
First capacitor, every grade of armature winding unit is in parallel with first capacitor, and armature winding unit at different levels is serially connected, and at different levels
One capacitor is serially connected；The positive voltage terminal of the input terminal connection DC voltage of chopped-off head armature winding unit, final stage armature winding list
The output end ground connection of member；Every grade of armature winding unit includes armature winding and metal-oxide-semiconductor, one end of armature winding as it is primary around
The input terminal of group unit, the drain electrode of the other end connection metal-oxide-semiconductor of armature winding, it is characterised in that:
Armature winding unit, further includes feedback branch, and feedback branch includes the secondary windings and the first electricity of isolation drive transformer
Resistance, the Same Name of Ends of secondary windings and the grid of metal-oxide-semiconductor connect, and the different name end of secondary windings and one end of first resistor connect, the
The other end of one resistance and the source electrode of metal-oxide-semiconductor connect.
8. high voltage flyback converter according to claim 7, it is characterised in that: the armature winding units at different levels
The control terminal of metal-oxide-semiconductor applies synchronous driving signal, and armature winding at different levels is the same as phase control and total magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107292.9U CN208424214U (en) | 2018-07-13 | 2018-07-13 | High voltage flyback converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107292.9U CN208424214U (en) | 2018-07-13 | 2018-07-13 | High voltage flyback converter |
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| CN208424214U true CN208424214U (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821107292.9U Withdrawn - After Issue CN208424214U (en) | 2018-07-13 | 2018-07-13 | High voltage flyback converter |
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| CN (1) | CN208424214U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004838A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
| WO2021003652A1 (en) * | 2019-07-08 | 2021-01-14 | 深圳欣锐科技股份有限公司 | Active clamp forward and flyback combined circuit of integrated vehicle-mounted charger |
-
2018
- 2018-07-13 CN CN201821107292.9U patent/CN208424214U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004838A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN109004838B (en) * | 2018-07-13 | 2023-11-24 | 广州金升阳科技有限公司 | High withstand voltage flyback converter |
| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
| WO2021003652A1 (en) * | 2019-07-08 | 2021-01-14 | 深圳欣锐科技股份有限公司 | Active clamp forward and flyback combined circuit of integrated vehicle-mounted charger |
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