CN107959423A - Circuit of reversed excitation and flyback sourse - Google Patents
Circuit of reversed excitation and flyback sourse Download PDFInfo
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- CN107959423A CN107959423A CN201711285375.7A CN201711285375A CN107959423A CN 107959423 A CN107959423 A CN 107959423A CN 201711285375 A CN201711285375 A CN 201711285375A CN 107959423 A CN107959423 A CN 107959423A
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Classifications
-
- 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
- H02M3/33569—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 having several active switching elements
- H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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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
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention discloses a kind of circuit of reversed excitation, it includes：Voltage transformation module, for city's alternating voltage to be converted to DC voltage；Transformer, including the first primary coil, the first secondary coil and second subprime coil, the first primary coil are used to receive DC voltage when it is connected；Output module, is connected to the first secondary coil, and for making the first secondary coil output loading operating voltage when the first primary coil disconnects, and for the output loading operating voltage when the first primary coil is connected；First control module, is connected to second subprime coil, and for controlling output module to make the first secondary coil output loading operating voltage when the first primary coil disconnects, and for controlling output module output loading operating voltage when the first primary coil is connected；Second control module, for controlling the break-make of the first primary coil.The circuit of reversed excitation of the present invention can improve power supply conversion efficiency.
Description
Technical field
The invention belongs to power circuit technical field, specifically, is related to a kind of circuit of reversed excitation and has the circuit of reversed excitation
Flyback sourse.
Background technology
Flyback sourse has the characteristics that design is simple, of low cost, so as to be widely used in all kinds of consumer electronics in life
In product.It is required each that city's alternating voltage (being usually 220V) is usually converted to all kinds of consumption electronic products by flyback sourse
Kind voltage, so as to meet the needs of production and living.
In life while the welfare that flyback sourse is brought is enjoyed, the requirement to the efficiency of flyback sourse is also increasingly
It is high.However, in the circuit design of existing flyback sourse, the power consumed in circuit is larger, thus power supply conversion efficiency compared with
It is low.Further, since the power consumption of circuit is larger in existing circuit design, the heat of generation is more, therefore also needs to extra dissipate
Hot device radiates such circuit, so as to cause the rising of manufacture cost.
The content of the invention
In order to solve the above-mentioned problems of the prior art, it can improve power supply it is an object of the invention to provide one kind and turn
Change the circuit of reversed excitation of efficiency and the flyback sourse with the circuit of reversed excitation.
According to an aspect of the present invention, there is provided a kind of circuit of reversed excitation, it includes：Voltage transformation module, for city to be handed over
Galvanic electricity pressure is converted to DC voltage；Transformer, including the first primary coil, the first secondary coil and second subprime coil, it is described
First primary coil is connected to the voltage transformation module；Output module, is connected to first secondary coil；First control mould
Block, is connected respectively to the second subprime coil and the output module；Second control module, is connected to the described first primary line
Circle, second control module are used for the break-make for controlling first primary coil；Wherein, when second control module controls
When first primary coil is connected, first primary coil receives the DC voltage；When the second control module control
When making the first primary coil disconnection, first secondary coil produces loaded work piece voltage, the second subprime coil production
Raw switch control voltage, first control module control the output module output described negative according to the switch control voltage
Carry operating voltage.
Further, second control module includes：Pulse width modulation chip, first switch pipe and first resistor
Device；The control terminal of the first switch pipe is connected to the first stitch of the pulse width modulation chip, the first switch pipe
Input terminal be connected to the second stitch of the pulse width modulation chip, the output terminal of the first switch pipe is connected to described
First primary coil, one end of the first resistor device are connected to the input terminal of the first switch pipe, the first resistor device
The other end be connected to ground terminal；When the pulse width modulation chip controls turn on the first switch pipe, described first
Primary coil is connected；When the pulse width modulation chip controls end the first switch pipe, first primary coil
Disconnect.
Further, the circuit of reversed excitation further includes：Voltage peak absorbing module, is connected to first primary coil,
The voltage peak absorbing module is used for the voltage point that first primary coil is absorbed when first primary coil disconnects
Peak.
Further, the voltage peak absorbing module includes：First diode, the first capacitor and second resistance device；
The anode of first diode is connected to the output terminal of the first switch pipe, and the cathode of first diode is connected to institute
One end of the first capacitor is stated, the other end of first capacitor is connected to first primary coil, the second resistance
One end of device is connected to the cathode of first diode, and the other end of the second resistance device is connected to the described first primary line
Circle.
Further, the output module includes：Second switch pipe, the first polar capacitor；The second switch pipe
Control terminal is connected to first control module, and the output terminal of the second switch pipe is connected to first secondary coil, institute
The input terminal electrical ground of second switch pipe is stated, the anode of first polar capacitor is connected to first secondary coil,
The cathode electrical ground of first polar capacitor.
Further, first control module includes：Second diode, the 3rd diode, 3rd resistor device, the 4th electricity
Hinder device, bipolar transistor and the second capacitor；The anode of second diode is connected to the second subprime coil, described
The cathode of second diode is connected to one end of the 3rd resistor device, and the other end of the 3rd resistor device is connected to described defeated
Go out module, one end of second capacitor is connected to the anode of second diode, the other end of second capacitor
The anode of the 3rd diode is connected to, the cathode of the 3rd diode is connected to the output module, the 4th electricity
One end of resistance device is connected to the anode of the 3rd diode, and the other end of the 4th resistor is connected to the three or two pole
The anode of pipe and the base stage for being connected to the bipolar transistor, the emitter of the bipolar transistor are connected to the output
Module, the collector electrical ground of the bipolar transistor.
Further, the circuit of reversed excitation further includes：Filter module, is connected to the voltage transformation module and described first
Between primary coil, the filter module is used to be filtered processing to the DC voltage.
Further, the filter module includes：3rd capacitor, the second polar capacitor；3rd capacitor
One end is connected to first primary coil, and the other end of the 3rd capacitor is connected to ground terminal, the second polarity electricity
The anode of container is connected to one end of the 3rd capacitor, and the cathode of second polar capacitor is connected to ground terminal.
Further, the circuit of reversed excitation further includes：Voltage feedback module, is connected to the output module and described first
Between control module, the voltage feedback module is used to detect the loaded work piece voltage, and according to the loaded work piece detected
Voltage produces feedback signal；When first primary coil is connected, the pulse width modulation chip is according to the feedback letter
The duty cycle of its signal provided to the control terminal of the first switch pipe number is provided.
According to another aspect of the present invention, a kind of flyback sourse is additionally provided, it includes above-mentioned circuit of reversed excitation.
Beneficial effects of the present invention：The circuit of reversed excitation of the present invention can reduce power consumption, so as to improve power supply conversion efficiency.This
Outside, since the circuit of reversed excitation of the present invention reduces power consumption, the heat that circuit because power consumption produces declines to a great extent, without volume
Outer circuit radiates, and then reduces production cost.
Brief description of the drawings
What is carried out in conjunction with the accompanying drawings is described below, above and other aspect, feature and advantage of the embodiment of the present invention
It will become clearer, in attached drawing：
Fig. 1 is the principle schematic of circuit of reversed excitation according to an embodiment of the invention；
Fig. 2 is the circuit diagram of circuit of reversed excitation according to an embodiment of the invention.
Embodiment
Hereinafter, with reference to the accompanying drawings to detailed description of the present invention embodiment.However, it is possible to come in many different forms real
Apply the present invention, and the specific embodiment of the invention that should not be construed as limited to illustrate here.Conversely, there is provided these implementations
Example is in order to explain the principle of the present invention and its practical application, so that others skilled in the art are it will be appreciated that the present invention
Various embodiments and be suitable for the various modifications of specific intended application.
In the accompanying drawings, for the sake of clarity, layer and the thickness in region are exaggerated.Identical label represents all the time in the accompanying drawings
Identical element.
It will be appreciated that although can be used term " first ", " second " etc. to describe various elements herein, but these
Element should not be limited by these terms.These terms are only used to distinguish an element with another element.
Fig. 1 is the principle schematic of circuit of reversed excitation according to an embodiment of the invention.
With reference to Fig. 1, circuit of reversed excitation according to an embodiment of the invention includes voltage transformation module 100, transformer 200, defeated
Go out module 300, the first control module 400 and the second control module 500.
Specifically, voltage transformation module 100 is used to city's alternating voltage being converted to DC voltage；Transformer 200 includes the
One primary coil, the first secondary coil and second subprime coil, first primary coil are used for when it is connected described in reception
DC voltage；Output module 300 is connected to first secondary coil, and output module 300 is used for output loading operating voltage；The
One control module 400 is connected to the second subprime coil and output module 300；Second control module 500 is used to control described
The break-make of first primary coil.
When the second control module 500 controls first primary coil to disconnect, first secondary coil produces load
Operating voltage, the second subprime coil produce switch control voltage, and the first control module 400 is according to the switch control voltage
Control output module 300 exports the loaded work piece voltage.
Further, in the present embodiment, when the second control module 500 controls first primary coil to connect, institute
State the first primary coil and receive the DC voltage, the first primary coil of transformer 200 and leakage inductance carry out energy storage at this time.
When the second control module 500 controls first primary coil to disconnect, first primary coil is to first secondary wire
Circle and the second subprime releasing winding energy, first secondary coil and the second subprime coil carry out energy storage,
So as to which first secondary coil produces the loaded work piece voltage, the second subprime coil produces the switch control electricity
Pressure.
Furthermore, it is necessary to explanation, transformer 200 further include the second primary coil and third time level coil, but at the beginning of second
Level coil and third time level coil are suspended, and are given over to spare.
Fig. 2 is the circuit diagram of circuit of reversed excitation according to an embodiment of the invention.
With reference to Fig. 2, voltage transformation module 100 can be for example bridge rectifier, but the present invention is not restricted to this.The voltage
Modular converter 100 is connected to firewire L and zero curve N, so that city's alternating voltage is converted to DC voltage.
In the present embodiment, in order to be filtered processing, flyback according to an embodiment of the invention to the DC voltage
Circuit further includes filter module 600, which is connected between voltage transformation module 100 and transformer 200.Also
It is to say, as another embodiment of the present invention, filter module 600 is not provided with can also.Specifically, filter module 600 includes：The
Three capacitor C3, the second polar capacitor CP2；One end of 3rd capacitor C3 is connected to first primary coil, the 3rd electricity
The anode that the other end of container C3 is connected to ground terminal E, the second polar capacitor CP2 is connected to first primary coil, the
The cathode of two polar capacitor CP2 is connected to ground terminal E.
Second control module 500 includes：Pulse width modulation (PWM) chip 510, first switch pipe Q1 and first resistor device
The control terminal of R1, first switch pipe Q1 are connected to the first stitch of pulse width modulation chip 510, the input of first switch pipe Q1
End is connected to the second stitch of pulse width modulation chip 510, and the output terminal of first switch pipe Q1 is connected to first primary
Coil, one end of first resistor device R1 are connected to the input terminal of first switch pipe Q1, and the other end of first resistor device R1 is connected to
Ground terminal E；When pulse width modulation chip 510 controls conducting first switch pipe Q1, pulse width modulation chip 510 controls institute
State the connection of the first primary coil；When pulse width modulation chip 510 controls cut-off first switch pipe Q1, pulse width modulation core
Piece 510 controls first primary coil to disconnect.
In the present embodiment, in order to be inhaled when the first primary coil is disconnected to the due to voltage spikes of the first primary coil
Receive, cause damage to avoid the due to voltage spikes to other components, circuit of reversed excitation according to an embodiment of the invention further includes electricity
Pointing peak absorption module 800.Voltage peak absorbing module 800 includes：First diode D1, the first capacitor C1 and second resistance
Device R2；The anode of first diode D1 is connected to the output terminal of first switch pipe Q1, and the cathode of the first diode D1 is connected to
One end of one capacitor C1, the other end of the first capacitor C1 are connected to first primary coil, and the one of second resistance device R2
End is connected to the cathode of the first diode D1, and the other end of second resistance device R2 is connected to first primary coil.
When first primary coil disconnects, due to voltage spikes is produced in first primary coil, which leads to
Cross the first diode D1 and charge to the first capacitor C1, so as to absorb the due to voltage spikes, avoid the due to voltage spikes from damaging
First switch pipe Q1.
Output module 300 includes：Second switch pipe Q2, the first polar capacitor CP1；The control terminal of second switch pipe Q2 connects
The first control module 400 is connected to, the output terminal of second switch pipe Q2 connects first secondary coil, and second switch pipe Q2's is defeated
Enter cathode and electrical ground that end is connected to the first polar capacitor CP1, the anode of the first polar capacitor CP1 is connected to described
First secondary coil is simultaneously connected to loaded work piece voltage output end Output；When the switch control voltage, for positive voltage, (it is protected
Demonstrate,prove second switch pipe Q2 conductings) when, the first control module 400 control conducting second switch pipe Q2, is stored in the first secondary coil
On energy charge as loaded work piece voltage to load discharge and to the first polar capacitor CP1；When the switch control
When voltage processed is negative voltage, control cut-off second switch pipe Q2, the first polar capacitor CP1 storage of the first control module 400
Voltage is as loaded work piece voltage to load discharge.Here, loaded work piece voltage output end Output is used to export the load
Operating voltage.
First control module 400 includes：Second diode D2, the 3rd diode D3,3rd resistor device R3, the 4th resistor
R4, bipolar transistor T and the second capacitor C2；The anode of second diode D2 is connected to the second subprime coil, and second
The cathode of diode D2 is connected to one end of 3rd resistor device R3, and the other end of 3rd resistor device R3 is connected to second switch pipe Q2
Control terminal, one end of the second capacitor C2 is connected to the anode of the second diode D2, the other end connection of the second capacitor C2
To the anode of the 3rd diode D3, the cathode of the 3rd diode D3 is connected to the control terminal of second switch pipe Q2, the 4th resistor
One end of R4 is connected to the anode of the 3rd diode D3, and the other end of the 4th resistor R4 is connected to the anode of the 3rd diode D3
And the base stage of bipolar transistor T is connected to, the emitter of bipolar transistor T is connected to the control terminal of second switch pipe Q2,
The collector electrical ground of bipolar transistor T.
In addition, in order to adjust the size of loaded work piece voltage, with steady load operating voltage, further, according to this hair
The circuit of reversed excitation of bright embodiment further includes voltage feedback module 700, which is used to detect the load work
Make voltage, and feedback signal is produced according to the loaded work piece voltage detected；When first primary coil is connected, the second control
Molding block 500 adjusts the duty cycle of its signal provided to the control terminal of first switch pipe Q1 according to the feedback signal, so that
Adjust the size of the loaded work piece voltage.That is, as another embodiment of the present invention, voltage feedback module 700 is not
Setting can also.Further, voltage feedback module 700 is photoelectrical coupler, but the present invention is not restricted to this.
Further, the device of pressure-limit current-limit, specifically, root are additionally provided with loaded work piece voltage output end Output
Further included according to the circuit of reversed excitation of the embodiment of the present invention：5th resistor R5, the 6th resistor R6, the 7th resistor R7, the 8th
Resistor R8 and three-terminal voltage-stabilizing pipe DT；5th resistor R5 and the 6th resistor R6 are connected in series in loaded work piece voltage output end
Between the output terminal of Output and three-terminal voltage-stabilizing pipe DT, the 7th resistor R7 and the 8th resistor R8 series connection after one end be connected to it is negative
Other end electrical ground after operating voltage output terminal Output, the 7th resistor R7 and the 8th resistor R8 connect is carried, three ends are steady
The input terminal electrical ground of pressure pipe DT, the common port of three-terminal voltage-stabilizing pipe DT be connected to the 7th resistor R7 and the 8th resistor R8 it
Between, voltage feedback module 700 is connected to the 6th resistor R6 both ends, for detecting the voltage (i.e. the at the 6th resistor R6 both ends
Partial pressures of the six resistor R6 to the loaded work piece voltage).
The course of work of circuit of reversed excitation according to an embodiment of the invention is illustrated below.With continued reference to Fig. 2, when
During two control modules 500 control conducting first switch pipe Q1, the second control module 500 controls first primary coil to connect,
The DC voltage is guided to by first switch pipe Q1 and first primary coil, energy stores in transformer 200
In one primary coil and leakage inductance, at this time due to the one-way conduction of the second diode D2 and the 3rd diode D3, so as to prevent
The voltage (such as negative voltage) that secondary stage coil produces appears in the control terminal of second switch pipe Q2, and the second capacitor C2 provides one
A peak current is to the base stage of bipolar transistor T, and bipolar transistor T is by amplifying peak current to second switch pipe Q2's
Control terminal, makes second switch pipe Q2 close rapidly, so that from the first polar capacitor CP1 to loaded work piece voltage output end
Output output loading operating voltages.
When the second control module 500 controls cut-off first switch pipe Q1, the second control module 500 is controlled at the beginning of described first
Level coil disconnects, and the voltage (such as positive pressure) that second subprime coil produces is provided by the second capacitor C2 and 3rd resistor device R3
One peak current charges to the miller capacitance of first switch pipe Q1, and the second diode D2 and first resistor device R1 are to first switch
The control terminal capacitance charging of pipe Q1, opens first switch pipe Q1, the loaded work piece of the first secondary coil generation of transformer 200
Voltage is exported by loaded work piece voltage output end Output at the same time charges the first polar capacitor CP1.
It should be noted that in the present embodiment, switching tube can be for example MOS transistor.The control terminal of switching tube is MOS
The grid of transistor, the input terminal of switching tube are the source electrode of MOS transistor, and the output terminal of switching tube is the drain electrode of MOS transistor,
But the present invention is not restricted to this.
In addition, present invention also offers a kind of flyback sourse, it is with above-mentioned circuit of reversed excitation.
In conclusion circuit of reversed excitation according to an embodiment of the invention can reduce power consumption, so as to improve power supply conversion effect
Rate.Further, since the circuit of reversed excitation of the embodiment of the present invention reduces power consumption, therefore the heat that circuit because power consumption produces is significantly
Decline, radiate without extra circuit, and then reduce production cost.
Although the present invention has shown and described with reference to specific embodiment, it should be appreciated by those skilled in the art that：
In the case where not departing from the spirit and scope of the present invention limited by claim and its equivalent, can carry out herein form and
Various change in details.
Claims (10)
- A kind of 1. circuit of reversed excitation, it is characterised in that including：Voltage transformation module, for city's alternating voltage to be converted to DC voltage；Transformer, including the first primary coil, the first secondary coil and second subprime coil, first primary coil are connected to The voltage transformation module；Output module, is connected to first secondary coil；First control module, is connected respectively to the second subprime coil and the output module；Second control module, is connected to first primary coil, and second control module is used to control first primary The break-make of coil；Wherein, when second control module controls first primary coil to connect, first primary coil receives institute State DC voltage；When second control module controls first primary coil to disconnect, first secondary coil produces Loaded work piece voltage, the second subprime coil produce switch control voltage, and first control module is controlled according to the switch Voltage processed controls the output module to export the loaded work piece voltage.
- 2. circuit of reversed excitation according to claim 1, it is characterised in that second control module includes：Pulse width tune Coremaking piece, first switch pipe and first resistor device；The control terminal of the first switch pipe is connected to the first stitch of the pulse width modulation chip, the first switch pipe Input terminal be connected to the second stitch of the pulse width modulation chip, the output terminal of the first switch pipe is connected to described First primary coil, one end of the first resistor device are connected to the input terminal of the first switch pipe, the first resistor device The other end be connected to ground terminal；When the pulse width modulation chip controls turn on the first switch pipe, first primary coil is connected；Work as institute When stating the pulse width modulation chip controls cut-off first switch pipe, first primary coil disconnects.
- 3. circuit of reversed excitation according to claim 2, it is characterised in that the circuit of reversed excitation further includes：Voltage peak absorbing Module, is connected to first primary coil, and the voltage peak absorbing module is used for when first primary coil disconnects Absorb the due to voltage spikes of first primary coil.
- 4. circuit of reversed excitation according to claim 3, it is characterised in that the voltage peak absorbing module includes：One or two Pole pipe, the first capacitor and second resistance device；The anode of first diode is connected to the output terminal of the first switch pipe, the cathode connection of first diode To one end of first capacitor, the other end of first capacitor is connected to first primary coil, and described second One end of resistor is connected to the cathode of first diode, and the other end of the second resistance device is connected at the beginning of described first Level coil.
- 5. circuit of reversed excitation according to claim 1, it is characterised in that the output module includes：Second switch pipe, first Polar capacitor；The control terminal of the second switch pipe is connected to first control module, and the output terminal of the second switch pipe is connected to First secondary coil, the input terminal electrical ground of the second switch pipe, the anode connection of first polar capacitor To first secondary coil, the cathode electrical ground of first polar capacitor.
- 6. circuit of reversed excitation according to claim 1 or 5, it is characterised in that first control module includes：Two or two pole Pipe, the 3rd diode, 3rd resistor device, the 4th resistor, bipolar transistor and the second capacitor；The anode of second diode is connected to the second subprime coil, and the cathode of second diode is connected to described One end of 3rd resistor device, the other end of the 3rd resistor device are connected to the output module, and the one of second capacitor End is connected to the anode of second diode, and the other end of second capacitor is connected to the sun of the 3rd diode Pole, the cathode of the 3rd diode are connected to the output module, and one end of the 4th resistor is connected to the described 3rd The anode of diode, the other end of the 4th resistor are connected to the anode of the 3rd diode and are connected to described bipolar The base stage of transistor npn npn, the emitter of the bipolar transistor are connected to the output module, the bipolar transistor Collector electrical ground.
- 7. circuit of reversed excitation according to claim 1, it is characterised in that the circuit of reversed excitation further includes：Filter module, connection To between the voltage transformation module and first primary coil, the filter module is used to filter the DC voltage Ripple processing.
- 8. circuit of reversed excitation according to claim 7, it is characterised in that the filter module includes：3rd capacitor, second Polar capacitor；One end of 3rd capacitor is connected to first primary coil, the other end of the 3rd capacitor Ground terminal is connected to, the anode of second polar capacitor is connected to one end of the 3rd capacitor, second polarity The cathode of capacitor is connected to ground terminal.
- 9. circuit of reversed excitation according to claim 2, it is characterised in that the circuit of reversed excitation further includes：Voltage feedback module, It is connected between the output module and first control module, the voltage feedback module is used to detect the loaded work piece Voltage, and feedback signal is produced according to the loaded work piece voltage detected；When first primary coil is connected, the pulse width modulation chip adjusts its offer according to the feedback signal and arrives The duty cycle of the signal of the control terminal of the first switch pipe.
- 10. a kind of flyback sourse, it is characterised in that including claim 1 to 9 any one of them circuit of reversed excitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285375.7A CN107959423A (en) | 2017-12-07 | 2017-12-07 | Circuit of reversed excitation and flyback sourse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711285375.7A CN107959423A (en) | 2017-12-07 | 2017-12-07 | Circuit of reversed excitation and flyback sourse |
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|---|---|
| CN107959423A true CN107959423A (en) | 2018-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711285375.7A Pending CN107959423A (en) | 2017-12-07 | 2017-12-07 | Circuit of reversed excitation and flyback sourse |
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| CN (1) | CN107959423A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611358A (en) * | 2019-11-11 | 2019-12-24 | 广州极飞科技有限公司 | Power supply circuit and charging equipment |
| CN110957788A (en) * | 2019-12-24 | 2020-04-03 | 广州极飞科技有限公司 | Power supply circuit and charging equipment |
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| CN110957788A (en) * | 2019-12-24 | 2020-04-03 | 广州极飞科技有限公司 | Power supply circuit and charging equipment |
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