CN108429467A - A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment - Google Patents
A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment Download PDFInfo
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- CN108429467A CN108429467A CN201810476255.3A CN201810476255A CN108429467A CN 108429467 A CN108429467 A CN 108429467A CN 201810476255 A CN201810476255 A CN 201810476255A CN 108429467 A CN108429467 A CN 108429467A
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- 239000000463 material Substances 0.000 claims abstract description 15
- 230000002452 interceptive effect Effects 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 43
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000004146 energy storage Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 101000639792 Homo sapiens U2 small nuclear ribonucleoprotein A' Proteins 0.000 claims 1
- 102100034465 U2 small nuclear ribonucleoprotein A' Human genes 0.000 claims 1
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- 238000010586 diagram Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The present invention discloses a kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment, including：When output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output voltage, is finally reached the output valve of setting, Switching Power Supply is made to enter stable working condition；Between pressure difference includes the circuit of 220V more than predetermined value in the way of grooving hole, the slot is set to reach scheduled size, interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit, makes Switching Power Supply be worked normally under low-temp low-pressure altitude environment；Switching Power Supply is set to enter stable working condition to reach realization, realize Switching Power Supply under severe conditions, also can normally start, reach and realize interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit, makes Switching Power Supply that can be worked normally under low-temp low-pressure altitude environment.
Description
Technical field
The present invention relates to switch power technology field more particularly to a kind of high-speed switches adapting to low-temp low-pressure altitude environment
Power circuit.
Background technology
Under high conditions, air pressure reduces (4500 meters of height above sea level, only 57.3KPa), and when winter, temperature is extremely low, can drop
To -40 DEG C (height above sea level often increases 1000 meters, 6 DEG C of mercury dropped).Switching Power Supply is because of under electrolytic capacitor at low temperature capacity at present
Drop is too many (capacity is about the 50%-80% of room temperature), in addition, since altitude environment influences, the dielectric strength of PCB can decline.
Switching Power Supply is placed under altitude environment and uses at present, because of capacitance decreasing concentration, can cause low input cannot
The problem of startup, full load cannot start.Because PCB dielectric strengths reduce, the input voltage of Switching Power Supply can be caused to get higher, it is high
It interacts between pressure drop circuit, leads to Switching Power Supply cisco unity malfunction.
Invention content
The present invention provides a kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment, to solve the prior art
Switching Power Supply be placed under altitude environment and use, because of capacitance decreasing concentration, can cause low input that cannot start, full load
The problem of cannot starting because PCB dielectric strengths reduce, the input voltage of Switching Power Supply can be caused to get higher, high pressure drop circuit it
Between the technical issues of interacting, leading to Switching Power Supply cisco unity malfunction.
In order to solve the above technical problems, the present invention provides a kind of high-speed switch power supply electricity adapting to low-temp low-pressure altitude environment
Road, including：
When output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output voltage, finally
The output valve for reaching setting makes Switching Power Supply enter stable working condition；
Between pressure difference is more than the circuit of predetermined value in the way of grooving hole, so that the slot is reached scheduled size, avoid
Material property reason leads to interfering with each other between High Pressure Difference circuit under altitude environment, makes Switching Power Supply on low-temp low-pressure plateau
It is worked normally under environment.
Wherein, described when output voltage does not reach setting value, complete backfeed loop is established, and be classified raising output
Voltage is finally reached the output valve of setting, and Switching Power Supply is made to enter stable working condition, including：
It when output diode is connected, does not need output voltage and reaches setting value, it is only necessary to which output voltage is more than the sum of D4
The conduction voltage drop of U2A, output end charges to C5 by U2A and D4, to make optocoupler U2 shorting advances, switching tube be connected again,
Meanwhile C4 charges to C5 by R4, improves the voltage of C5, when making next cycle, the conducting voltage of U2 is just increased to
The voltage of C5 adds the conduction voltage drop of D4 and U2A；So cycle, until output voltage reaches setting value, R8 both end voltages reach
To the reference voltage of U3, Switching Power Supply has been put into the working condition stablized.
Wherein, it is described adapt to low-temp low-pressure altitude environment high-speed switch power circuit, further include：
When switching tube is connected, exchange input rectifying voltage Vin is added to the first winding of high frequency transformer, at the same time,
Value is that Vin/n voltages are added in secondary winding, and due to same end, this voltage makes output diode that can not reversely be connected；Its
In, n is the turn ratio.
Wherein, the switching tube conducting, including：
4 feet and the conducting of 7 feet of chip U1 are controlled, switching tube is connected at this time.
Wherein, described when switching tube is connected, exchange input rectifying voltage Vin is added to the first winding of high frequency transformer,
At the same time, it is worth and is added in secondary winding for Vin/n voltages, due to same end, this voltage makes the reversed nothing of output diode
Method is connected；Wherein, n is the turn ratio, further includes：
When first winding is in energy storage, no current flows through in secondary winding.
Wherein, it is described adapt to low-temp low-pressure altitude environment high-speed switch power circuit, further include：
When switching tube ends, first winding is discharged to secondary winding, output diode forward conduction, to exporting filtered electrical
Capacity charge and load supplying.
Wherein, described when switching tube ends, first winding is discharged to secondary winding, and output diode forward conduction is right
Output filter capacitor charges and load supplying, further includes：
When output end voltage reaches the value of setting, the voltage at the both ends R8 has reached the reference voltage of U3, U2 conductings, control
4 feet and the conducting of 7 feet of switch controlled chip U1 is connected in chip, repeats when switching tube ends, and first winding is to secondary winding
Electric discharge, output diode forward conduction so recycle to output filter capacitor charging and load supplying, thus establish one
The working condition of a stabilization makes Switching Power Supply output stablize.
Wherein, it is described adapt to low-temp low-pressure altitude environment high-speed switch power circuit, further include：
When element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, first winding energy storage
Not enough, when causing output diode to be connected, when output end voltage does not reach setting value, U2 has no idea to be connected, and switchs in this way
Power supply is just had no idea into stable working condition.
Wherein, it is described when element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, once
Winding energy storage is inadequate, and when output diode being caused to be connected, when output end voltage does not reach setting value, U2 has no idea to be connected,
Switching Power Supply just has no idea to enter stable working condition in this way, further includes：
When output filter capacitor is excessive or load is capacitive load, when output diode can be caused to be connected, output end
Voltage does not reach setting value, and U2 has no idea to be connected, and such Switching Power Supply is had no idea into stable working condition.
Wherein, it is described pressure difference be more than predetermined value circuit between in the way of grooving hole, so that the slot is reached scheduled
Size, interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit, makes Switching Power Supply low
It is worked normally under warm low pressure altitude environment, including：
Between pressure difference includes the circuit of 220V more than predetermined value in the way of grooving hole, the slot is made to reach scheduled big
Small, interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit makes Switching Power Supply in low temperature
It is worked normally under low pressure altitude environment.
The high-speed switch power circuit provided by the invention for adapting to low-temp low-pressure altitude environment, including：Do not have in output voltage
Have when reaching setting value, establishes complete backfeed loop, and be classified raising output voltage, be finally reached the output valve of setting, make
Switching Power Supply enters stable working condition；Between pressure difference includes the circuit of 220V more than predetermined value in the way of grooving hole,
The slot is set to reach scheduled size, it is mutual dry between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit
It disturbs, Switching Power Supply is made to be worked normally under low-temp low-pressure altitude environment；Switching Power Supply is set to enter stable work to reach realization
Make state, realize Switching Power Supply under severe conditions, also can normally start, reaches realization and avoid the material under altitude environment special
Property reason leads to interfering with each other between High Pressure Difference circuit, makes Switching Power Supply that can be worked normally under low-temp low-pressure altitude environment.
Description of the drawings
Fig. 1 is the circuit diagram for the high-speed switch power circuit that the present invention adapts to low-temp low-pressure altitude environment；
Fig. 2 is the fluting schematic diagram for the high-speed switch power circuit grooved bore that the present invention adapts to low-temp low-pressure altitude environment.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is described in further detail.It is emphasized that following implement
Example is merely to illustrate the present invention, but is not defined to the scope of the present invention.Likewise, following embodiment is only the portion of the present invention
Point embodiment and not all embodiments, the institute that those of ordinary skill in the art are obtained without creative efforts
There are other embodiments, shall fall within the protection scope of the present invention.
The present invention provides a kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment.
Fig. 1 and Fig. 2 are referred to, Fig. 1 is the electricity for the high-speed switch power circuit that the present invention adapts to low-temp low-pressure altitude environment
Road schematic diagram, Fig. 2 are the fluting schematic diagram for the high-speed switch power circuit grooved bore that the present invention adapts to low-temp low-pressure altitude environment,
The present invention adapts to the high-speed switch power circuit of low-temp low-pressure altitude environment, including：
When output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output voltage, finally
The output valve for reaching setting makes Switching Power Supply enter stable working condition；
Between pressure difference is more than the circuit of predetermined value in the way of grooving hole, so that the slot is reached scheduled size, avoid
Material property reason leads to interfering with each other between High Pressure Difference circuit under altitude environment, makes Switching Power Supply on low-temp low-pressure plateau
It is worked normally under environment.
Wherein, when output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output electricity
Pressure, is finally reached the output valve of setting, Switching Power Supply is made to enter stable working condition, including：
It when output diode is connected, does not need output voltage and reaches setting value, it is only necessary to which output voltage is more than the sum of D4
The conduction voltage drop of U2A, output end charges to C5 by U2A and D4, to make optocoupler U2 shorting advances, switching tube be connected again,
Meanwhile C4 charges to C5 by R4, improves the voltage of C5, when making next cycle, the conducting voltage of U2 is just increased to
The voltage of C5 adds the conduction voltage drop of D4 and U2A；So cycle, until output voltage reaches setting value, R8 both end voltages reach
To the reference voltage of U3, Switching Power Supply has been put into the working condition stablized.
Wherein, the present invention adapts to the high-speed switch power circuit of low-temp low-pressure altitude environment, further includes：
When switching tube is connected, exchange input rectifying voltage Vin is added to the first winding of high frequency transformer, at the same time,
Value is that Vin/n voltages are added in secondary winding, and due to same end, this voltage makes output diode that can not reversely be connected；Its
In, n is the turn ratio.
Wherein, switching tube is connected, including：
4 feet and the conducting of 7 feet of chip U1 are controlled, switching tube is connected at this time.
Wherein, when switching tube is connected, exchange input rectifying voltage Vin is added to the first winding of high frequency transformer, with this
Meanwhile being worth and being added in secondary winding for Vin/n voltages, due to same end, this voltage makes output diode that can not reversely lead
It is logical；Wherein, n is the turn ratio, further includes：
When first winding is in energy storage, no current flows through in secondary winding.
Wherein, the present invention adapts to the high-speed switch power circuit of low-temp low-pressure altitude environment, further includes：
When switching tube ends, first winding is discharged to secondary winding, output diode forward conduction, to exporting filtered electrical
Capacity charge and load supplying.
Wherein, when switching tube ends, first winding is discharged to secondary winding, output diode forward conduction, to output
Filter capacitor charges and load supplying, further includes：
When output end voltage reaches the value of setting, the voltage at the both ends R8 has reached the reference voltage of U3, U2 conductings, control
4 feet and the conducting of 7 feet of switch controlled chip U1 is connected in chip, repeats when switching tube ends, and first winding is to secondary winding
Electric discharge, output diode forward conduction so recycle to output filter capacitor charging and load supplying, thus establish one
The working condition of a stabilization makes Switching Power Supply output stablize.
Wherein, the present invention adapts to the high-speed switch power circuit of low-temp low-pressure altitude environment, further includes：
When element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, first winding energy storage
Not enough, when causing output diode to be connected, when output end voltage does not reach setting value, U2 has no idea to be connected, and switchs in this way
Power supply is just had no idea into stable working condition.
Wherein, when element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, first winding
Energy storage is inadequate, and when output diode being caused to be connected, when output end voltage does not reach setting value, U2 has no idea to be connected, in this way
Switching Power Supply is just had no idea：
When output filter capacitor is excessive, when output diode can be caused to be connected, output end voltage does not reach setting value,
U2 has no idea to be connected, and such Switching Power Supply is had no idea into stable working condition.
Wherein, when element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, first winding
Energy storage is inadequate, and when output diode being caused to be connected, when output end voltage does not reach setting value, U2 has no idea to be connected, in this way
Switching Power Supply is just had no idea：
When load is capacitive load, when output diode can be caused to be connected, output end voltage does not reach setting value, U2
It has no idea to be connected, such Switching Power Supply is had no idea into stable working condition.
Wherein, the present invention adapts to the high-speed switch power circuit of low-temp low-pressure altitude environment, further includes：
When output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output voltage, finally
The output valve for reaching setting makes Switching Power Supply enter stable working condition.
Wherein, the slot is made to reach scheduled size in the way of grooving hole between pressure difference is more than the circuit of predetermined value,
Interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit, makes Switching Power Supply in low-temp low-pressure
It is worked normally under altitude environment, including：
Between pressure difference includes the circuit of 220V more than predetermined value in the way of grooving hole, the slot is made to reach scheduled big
Small, interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit makes Switching Power Supply in low temperature
It is worked normally under low pressure altitude environment.
The high-speed switch power circuit provided by the invention for adapting to low-temp low-pressure altitude environment, including：Do not have in output voltage
Have when reaching setting value, establishes complete backfeed loop, and be classified raising output voltage, be finally reached the output valve of setting, make
Switching Power Supply enters stable working condition；Between pressure difference includes the circuit of 220V more than predetermined value in the way of grooving hole,
The slot is set to reach scheduled size, it is mutual dry between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit
It disturbs, Switching Power Supply is made to be worked normally under low-temp low-pressure altitude environment；Switching Power Supply is set to enter stable work to reach realization
Make state, realize Switching Power Supply under severe conditions, also can normally start, reaches realization and avoid the material under altitude environment special
Property reason leads to interfering with each other between High Pressure Difference circuit, makes Switching Power Supply that can be worked normally under low-temp low-pressure altitude environment.
In several embodiments provided by the present invention, it should be understood that disclosed circuit can pass through others
Mode is realized.For example, circuit implementation described above is only schematical, for example, the division of circuit or component,
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple circuits or component can
To combine or be desirably integrated into another circuit system, or some features can be ignored or not executed.Another point, it is shown
Or the mutual coupling, direct-coupling or communication connection discussed can be by some interfaces, between circuit or component
Coupling or communication connection are connect, can be electrical, machinery or other forms.
The component illustrated as separating component may or may not be physically separated, as assembly of elements
Component or circuit may or may not be physical unit, you can be located at a place, or can also be distributed
Onto multiple circuit units.Some or all of circuit or component therein can be selected according to the actual needs to realize this
The purpose of embodiment scheme.
In addition, each functional circuit in each embodiment of the present invention can be integrated in a processing circuit, also may be used
To be that each unit circuit or component physically exist alone, can also two or more element circuits or component it is integrated
In an element circuit or component.The form that hardware may be used in above-mentioned integrated element circuit or component is realized.
If integrated element circuit or component are realized in the form of hardware function units and as independent product pins
It sells or in use, can be stored in a computer read/write memory medium.Based on this understanding, technical side of the invention
Substantially all or part of the part that contributes to existing technology or the technical solution can be produced case with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions are used so that one
Platform computer equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute sheet
Invent all or part of step of each embodiment scheme.And storage medium above-mentioned includes：USB flash disk, read-only is deposited mobile hard disk
Reservoir (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or
The various media that can store program code such as CD.
The foregoing is merely the section Examples of the present invention, are not intended to limit protection scope of the present invention, every utilization
Equivalent device or equivalent process transformation made by description of the invention and accompanying drawing content are applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment, which is characterized in that including：
When output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output voltage, is finally reached
The output valve of setting makes Switching Power Supply enter stable working condition；
Between pressure difference is more than the circuit of predetermined value in the way of grooving hole, so that the slot is reached scheduled size, avoid in height
Material property reason leads to interfering with each other between High Pressure Difference circuit under former environment, makes Switching Power Supply in low-temp low-pressure altitude environment
Lower normal work.
2. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as described in claim 1, which is characterized in that described
When output voltage does not reach setting value, complete backfeed loop is established, and is classified raising output voltage, is finally reached setting
Output valve, so that Switching Power Supply is entered stable working condition, including：
It when output diode is connected, does not need output voltage and reaches setting value, it is only necessary to which output voltage is more than D4's and U2A's
Conduction voltage drop, output end charges to C5 by U2A and D4, to make optocoupler U2 shorting advances, switching tube be connected again, meanwhile,
C4 charges to C5 by R4, improves the voltage of C5, and when making next cycle, the conducting voltage of U2 has just been increased to the electricity of C5
Conduction voltage drop of the pressure along with D4 and U2A；So cycle, until output voltage reaches setting value, R8 both end voltages reach U3's
Reference voltage, Switching Power Supply have been put into the working condition stablized.
3. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as claimed in claim 2, which is characterized in that described
Adapt to low-temp low-pressure altitude environment high-speed switch power circuit, further include：
When switching tube is connected, exchange input rectifying voltage Vin is added to the first winding of high frequency transformer, at the same time, is worth and is
Vin/n voltages are added in secondary winding, and due to same end, this voltage makes output diode that can not reversely be connected；Wherein, n
For the turn ratio.
4. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as claimed in claim 3, which is characterized in that described
Switching tube is connected, including：
4 feet and the conducting of 7 feet of chip U1 are controlled, switching tube is connected at this time.
5. the high-speed switch power circuit of adaptation low-temp low-pressure altitude environment as described in claim 3 or 4, which is characterized in that
Described when switching tube is connected, exchange input rectifying voltage Vin is added to the first winding of high frequency transformer, at the same time, is worth and is
Vin/n voltages are added in secondary winding, and due to same end, this voltage makes output diode that can not reversely be connected；Wherein, n
For the turn ratio, further include：
When first winding is in energy storage, no current flows through in secondary winding.
6. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as claimed in claim 1 or 2, which is characterized in that
It is described adapt to low-temp low-pressure altitude environment high-speed switch power circuit, further include：
When switching tube ends, first winding is discharged to secondary winding, and output diode forward conduction fills output filter capacitor
Electricity and load supplying.
7. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as claimed in claim 6, which is characterized in that described
When switching tube ends, first winding to secondary winding discharge, output diode forward conduction, to output filter capacitor charging and
Load supplying further includes：
When output end voltage reaches the value of setting, the voltage at the both ends R8 has reached the reference voltage of U3, and U2 conductings control chip
4 feet and the conducting of 7 feet that switch controlled chip U1 is connected, repeat when switching tube ends, and first winding is discharged to secondary winding,
Output diode forward conduction so recycles to output filter capacitor charging and load supplying, thus establishes a stabilization
Working condition, make Switching Power Supply output stablize.
8. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as claimed in claim 1 or 2, which is characterized in that
It is described adapt to low-temp low-pressure altitude environment high-speed switch power circuit, further include：
When element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, first winding energy storage is inadequate,
When output diode being caused to be connected, when output end voltage does not reach setting value, U2 has no idea to be connected, and such Switching Power Supply is just
It has no idea into stable working condition.
9. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as claimed in claim 8, which is characterized in that described
When element there are error either peripheral environment variation when, when input voltage reaches it is minimum when, first winding energy storage is inadequate, causes
When output diode is connected, when output end voltage does not reach setting value, U2 has no idea to be connected, and such Switching Power Supply does not just have
Method enters stable working condition, further includes：
When output filter capacitor is excessive or load is capacitive load, when output diode can be caused to be connected, output end voltage
Do not reach setting value, U2 has no idea to be connected, and such Switching Power Supply is had no idea into stable working condition.
10. adapting to the high-speed switch power circuit of low-temp low-pressure altitude environment as described in claim 1, which is characterized in that institute
State pressure difference be more than predetermined value circuit between in the way of grooving hole, so that the slot is reached scheduled size, avoid on plateau
Material property reason leads to interfering with each other between High Pressure Difference circuit under environment, makes Switching Power Supply under low-temp low-pressure altitude environment
Normal work, including：
Between pressure difference includes the circuit of 220V more than predetermined value in the way of grooving hole, the slot is made to reach scheduled size,
Interfering with each other between avoiding under altitude environment material property reason from leading to High Pressure Difference circuit, makes Switching Power Supply in low-temp low-pressure
It is worked normally under altitude environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476255.3A CN108429467A (en) | 2018-05-17 | 2018-05-17 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810476255.3A CN108429467A (en) | 2018-05-17 | 2018-05-17 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108429467A true CN108429467A (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810476255.3A Pending CN108429467A (en) | 2018-05-17 | 2018-05-17 | A kind of high-speed switch power circuit adapting to low-temp low-pressure altitude environment |
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| CN (1) | CN108429467A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202424526U (en) * | 2011-11-17 | 2012-09-05 | 常州能动电子科技有限公司 | High-voltage input power system |
| CN104300794A (en) * | 2014-09-19 | 2015-01-21 | 中山市鸿程科研技术服务有限公司 | Improved circuit of high-frequency switching power source |
| CN205123587U (en) * | 2015-11-30 | 2016-03-30 | 河北佳讯飞扬科技发展有限公司 | Switching power supply of super wide region input |
| CN106877696A (en) * | 2015-12-13 | 2017-06-20 | 李福来 | Based on TOPSwitch-GX Switching Power Supplies |
-
2018
- 2018-05-17 CN CN201810476255.3A patent/CN108429467A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202424526U (en) * | 2011-11-17 | 2012-09-05 | 常州能动电子科技有限公司 | High-voltage input power system |
| CN104300794A (en) * | 2014-09-19 | 2015-01-21 | 中山市鸿程科研技术服务有限公司 | Improved circuit of high-frequency switching power source |
| CN205123587U (en) * | 2015-11-30 | 2016-03-30 | 河北佳讯飞扬科技发展有限公司 | Switching power supply of super wide region input |
| CN106877696A (en) * | 2015-12-13 | 2017-06-20 | 李福来 | Based on TOPSwitch-GX Switching Power Supplies |
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Application publication date: 20180821 |
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