CN202889200U - Power supply conversion device - Google Patents
Power supply conversion device Download PDFInfo
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- CN202889200U CN202889200U CN 201220155912 CN201220155912U CN202889200U CN 202889200 U CN202889200 U CN 202889200U CN 201220155912 CN201220155912 CN 201220155912 CN 201220155912 U CN201220155912 U CN 201220155912U CN 202889200 U CN202889200 U CN 202889200U
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- diode
- electrically connected
- electric capacity
- power supply
- capacitor
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- 238000006243 chemical reaction Methods 0.000 title abstract description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 47
- 238000010586 diagram Methods 0.000 description 22
- 238000007600 charging Methods 0.000 description 20
- 238000004146 energy storage Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a power conversion device contains the transformer, once side circuit, secondary side circuit and power output unit. The primary side circuit is positioned on the primary side of the transformer and comprises a power input unit, a transistor switch, a first diode, a second diode, a first capacitor and a second capacitor; the secondary side circuit is located on the secondary side of the transformer and comprises a third diode, a fourth diode, a third capacitor and a fourth capacitor. The voltage of the power output unit electrically connected between the second capacitor and the fourth capacitor can be higher than the voltage of the power input unit by the control of the transistor switch.
Description
Technical field
The utility model relates to a kind of conversion equipment, and particularly relevant for a kind of power supply change-over device.
Background technology
Tradition (Boost) transducer that boosts is the power supply changeover device that a kind of output voltage is higher than input voltage, and when output voltage gain was low, circuit can be realized higher conversion efficiency; Otherwise when high voltage gain was exported, the parasitic antenna on the circuit will so that circuit loss becomes large, cause conversion efficiency to reduce.Wherein traditional boost converter is in order to obtain the high voltage gain ratio, so that the work period must surpass 50%, and excessive work period meeting is so that power supply conversion efficiency is more and more low.
Return (Flyback) transducer of speeding by the number of turns ratio of primary side (primary side) with secondary side (primary side), can obtain high voltage gain.Therefore for improving voltage gain, must increase the number of turns of primary side winding, so that the leakage inductance of transformer and copper loss become large.When power switch ends, can produce abrupt voltage wave (Spike) because the leakage inductance of transformer can drain at power switch between (Drain) and source electrode (Source), and cause the loss of circuit, must select high withstand voltage power switch.The abrupt voltage wave that causes in order to overcome leakage inductance, the design of buffer circuit (Snubber Circuit) will be the emphasis of flyback converter, and buffer circuit will be because the cause of resistance will cause the loss of some conversions.
The utility model content
In view of this, the utility model provides a kind of power supply change-over device that can reduce conversion loss.
For reaching above-mentioned purpose, the utility model provides a kind of power supply change-over device, comprises transformer, primary side circuit, secondary side circuit and power supply output unit.Transformer has the secondary side of primary side and corresponding this primary side, and primary side has first end and the second end, and secondary side has the 3rd end and the 4th end.The primary side circuit comprises power input unit, transistor switch, the first electric capacity, the second electric capacity, the first diode and the second diode.Power input unit comprises the first electrode tip and the second electrode tip, the first electrode tip is electrically connected first end, transistor switch comprises drain electrode end (drain end, Drain) and source terminal, drain electrode end is electrically connected the second end, source terminal is electrically connected the second electrode tip, one end of the first electric capacity is electrically connected drain electrode end, the other end of the first electric capacity is electrically connected the P type abutting end of the second diode, the P type abutting end of the first diode is electrically connected first end, the N-type abutting end of the first diode is electrically connected the P type abutting end of the second diode, and an end of the second electric capacity is electrically connected source terminal, and the other end of the second electric capacity is electrically connected the N-type abutting end of the second diode.The secondary side circuit comprises the 3rd electric capacity, the 4th electric capacity, the 3rd diode and the 4th diode.One end of the 3rd electric capacity is electrically connected the 3rd end, the other end of the 3rd electric capacity is electrically connected the P type abutting end of the 4th diode, the P type abutting end of the 3rd diode is electrically connected the 4th end, the N-type abutting end of the 3rd diode is electrically connected the P type abutting end of the 4th diode, one end of the 4th electric capacity is electrically connected the N-type abutting end of the 4th diode, and the other end of the 4th electric capacity is electrically connected the N-type abutting end of the 4th end and the second diode; The power supply output unit is connected electrically in the N-type abutting end of the second electrode tip and the 4th diode.
According to this novel described power supply change-over device of embodiment, above-mentioned transistor switch more comprises gate terminal; Transistor switch can be metal-oxide half field effect transistor.
According to this novel described power supply change-over device of embodiment, above-mentioned the first electrode tip is positive electricity end.
According to this novel described power supply change-over device of embodiment, above-mentioned the second electrode tip is that negative electricity is extreme.
According to this novel described power supply change-over device of embodiment, above-mentioned power supply output unit more comprises load.
Hence one can see that, and power supply change-over device provided by the utility model comprises following characteristics: have that high voltage gain, leakage inductance energy reclaim, circuit design is simple and easy and high conversion efficiency.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model one embodiment power supply change-over device;
Fig. 2 is the circuit diagram of the utility model one embodiment power supply change-over device;
Fig. 3 is the circuit operation schematic diagram of its transistor switch of circuit of Fig. 2 when being switched on;
Fig. 4 is the circuit operation schematic diagram of its transistor switch of circuit of Fig. 2 when being cut off;
Fig. 5 is the movement oscillogram of Fig. 2 circuit;
Fig. 6 is thin section's circuit operation schematic diagram () of Fig. 2;
Fig. 7 is thin section's circuit operation schematic diagram (two) of Fig. 2;
Fig. 8 is thin section's circuit operation schematic diagram (three) of Fig. 2;
Fig. 9 is thin section's circuit operation schematic diagram (four) of Fig. 2;
Figure 10 is thin section's circuit operation schematic diagram (five) of Fig. 2;
Figure 11 is thin section's circuit operation schematic diagram (six) of Fig. 2; And
Figure 12 is thin section's circuit operation schematic diagram (seven) of Fig. 2.
Description of reference numerals
1 power supply change-over device
11 primary side circuit
12 secondary side circuit
C1 the first electric capacity
C2 the second electric capacity
C3 the 3rd electric capacity
C4 the 4th electric capacity
D1 the first diode
D2 the second diode
D3 the 3rd diode
D4 the 4th diode
The E1 first end
E2 the second end
E3 the 3rd end
E4 the 4th end
The Lm magnetizing inductance
Lk1, the Lk2 leakage inductance
The S1 transistor switch
The D drain electrode end
The G gate terminal
R
LLoad
The S source terminal
The Tr transformer
The charging voltage of Vc1 the first electric capacity
The charging voltage of Vc2 the second electric capacity
The charging voltage of Vc3 the 3rd electric capacity
The charging voltage of Vc4 the 4th electric capacity
V
1Power input unit
Vo power supply output unit.
Embodiment
For allowing above-mentioned structure of the present utility model, feature, effect and purpose that more detailed understanding can be arranged, now cooperate accompanying drawing that the utility model related embodiment is described in detail as follows.
See also Fig. 1, Fig. 1 is the circuit block diagram of the utility model one embodiment power supply change-over device.
As shown in Figure 1, power supply change-over device 1 comprises primary side circuit 11, secondary side circuit 12 and power supply output unit Vo.Primary side circuit 11 and secondary side circuit 12 can lay respectively at primary side and the secondary side of a transformer, and it utilizes respectively (Boost) transducer that boosts to realize cleverly high voltage gain and high conversion efficiency with returning the principle of (Flyback) transducer of speeding.
See also Fig. 2, Fig. 2 is the circuit diagram of the utility model one embodiment power supply change-over device.
Specifically, power supply change-over device 1 comprises transformer Tr, primary side circuit 11, secondary side circuit 12 and power supply output unit Vo.
Transformer Tr has the secondary side of primary side and corresponding this primary side, and wherein the voltage of secondary side is by acquisition that primary side is responded to.Primary side has first end E1 and the second end E2; Secondary side has the 3rd end E3 and the 4th end E4.
Wherein, transistor switch S1 for the metal-oxide half field effect transistor that more comprises gate terminal G (for example: MOS FET), but be not limited to this.And power input unit V
IThe first electrode tip can be positive electricity end; Power input unit V
IThe second electrode tip to can be negative electricity extreme.And power supply output unit Vo more comprises load R
L
Please consult simultaneously Fig. 2 and Fig. 3, Fig. 3 is the circuit operation schematic diagram of its transistor switch of circuit of Fig. 2 when being switched on.
By Fig. 2 and Fig. 3 as can be known, the high voltage gain principle of power supply change-over device 1 is as follows:
When transistor switch S1 is switched on (ON) (the second diode D2 and the 4th diode D4 are the state of not conducting).The first diode D1 of transformer Tr primary side begins conducting, and the first capacitor C 1 begins charging, a magnetizing inductance Lm begins energy storage.Wherein, the tank voltage of the charging voltage of the first capacitor C 1 and magnetizing inductance Lm is input power V
I
And when transistor switch S1 was switched on (ON), the voltage of transformer Tr secondary side was to be induced to secondary side by primary side, and via the 3rd diode D3 guiding path the 3rd capacitor C 3 was charged.The voltage of transformer Tr secondary side and the 3rd capacitor C 3 charging voltages are doubly input voltage of n (n: turn ratio=N2/N1).
Please consult simultaneously Fig. 4, Fig. 4 is the circuit operation schematic diagram of its transistor switch of circuit of Fig. 2 when being cut off.
When transistor switch S1 is cut off (OFF) (the first diode D1 and the 3rd diode D3 are the state of cut-off), the first diode D1 of transformer Tr primary side is cut-off; The second diode D2 begins conducting.At this moment, the charging voltage of the second capacitor C 2 equals the charging voltage of the first capacitor C 1, tank voltage and the power input unit V of magnetizing inductance Lm
ISum (is tank voltage+V of Vc2=Vc1+Lm
I).
And when transistor switch S1 was cut off (OFF), the 3rd diode D3 was the state of cut-off; The 4th diode D4 begins conducting.At this moment, the charging voltage of the 4th capacitor C 4 equals the charging voltage of the 3rd capacitor C 3 and the voltage sum of transformer Tr secondary side (being the voltage of Vc4=Vc3+ transformer Tr secondary side).
Therefore, load R
LThe voltage of striding (being the voltage of power supply output unit Vo) for both voltage of the 4th capacitor C 4 of the second capacitor C 2 of transformer Tr primary side and transformer Tr secondary side and.
Please consult simultaneously Fig. 5 and Fig. 6, Fig. 5 is the movement oscillogram of Fig. 2 circuit; Fig. 5 is thin section's circuit operation schematic diagram () of Fig. 1.
In details of the words, when being in a mode of operation one (the time t of Fig. 5 for example
0~ t
1Wherein Vgs is the input signal of transistor switch S1) time, transistor switch S1 begins conducting, the first diode D1 also begins forward conducting the second diode D2 and then is backward stop, the first capacitor C 1 via the first diode D1 forward conducting begin the charging, and magnetizing inductance Lm and leakage inductance Lk1 also begin energy storage, and secondary side is stored in the residue leakage inductance energy of air gap, still via the 4th diode D4 forward conducting energy is delivered to load R
LThe 4th capacitor C 4 with secondary side.
Please consult simultaneously Fig. 5 and Fig. 6, Fig. 6 is thin section's circuit operation schematic diagram (two) of Fig. 2.
When being in a mode of operation two (the time t of Fig. 5 for example
1~ t
2) time, transistor switch S1 still is conducting state.At this moment, after the residue leakage inductance energy that secondary side is stored in air gap released, the 4th diode D4 just began to be cut-off state, and the 3rd diode D3 begins forward conducting, the cross-pressure V of magnetizing inductance Lm
LMVia ideal transformer Tr with energy-sensitive to secondary side, and utilize the 3rd diode D3 forward conducting to the charging of the 3rd capacitor C 3.And the first capacitor C 1 still via the first diode D1 forward conducting be charged state, magnetizing inductance Lm and leakage inductance Lk1 still are energy storage state.
Please consult simultaneously Fig. 5 and Fig. 8, Fig. 8 is thin section's circuit operation schematic diagram (three) of Fig. 2.
When being in a mode of operation three (the time t of Fig. 5 for example
2~ t
3) time, transistor switch S1 begins cut-off, and the first diode D1 also is backward stop.As power input unit V
I, magnetizing inductance Lm cross-pressure V
LM, leakage inductance Lk1 cross-pressure V
LK1During with the voltage of the voltage Vc1 of the first capacitor C 1 with greater than the voltage Vc2 of clamp the second capacitor C 2, this moment, the second diode D2 began forward conducting, to clamp the second capacitor C 2 chargings and the electric current of part to load R
LDischarge; And the energy of secondary side leakage inductance, still via the 3rd diode D3 forward conducting to the charging of multiplication of voltage the 3rd capacitor C 3.
Please consult simultaneously Fig. 5 and Fig. 9, Fig. 9 is thin section's circuit operation schematic diagram (four) of Fig. 2.
When being in a mode of operation four (the time t of Fig. 5 for example
3~ t
4) time, transistor switch S1 still is in cut-off state.As the voltage Vc3 of secondary side multiplication of voltage the 3rd capacitor C 3, the cross-pressure V of leakage inductance Lk2
LK2Voltage V with the induction of ideal transformer Tr secondary side
N2Voltage and during greater than the voltage Vc4 of output the 4th capacitor C 4, the 3rd diode D3 begins backward stop and the 4th diode D4 just begins forward conducting, then the energy of secondary side begin via the 4th diode D4 forward the path of conducting to load R
LRelease energy, secondary side is exported the 4th capacitor C 4 and is still continued load R
LDischarge; Forward conducting is lasting to 2 chargings of clamp the second capacitor C and the energy of primary side is still via the second diode D2, and the part electric current is to load R
LEnergy is provided.
Please consult simultaneously Fig. 5 and Figure 10, Figure 10 is thin section's circuit operation schematic diagram (five) of Fig. 2.
When being in a mode of operation five (the time t of Fig. 5 for example
4~ t
5) time, transistor switch S1 still is in cut-off state.The energy of primary side continues then that forward conducting is to 2 chargings of clamp the second capacitor C via the second diode D2, and the part electric current is to load R
LEnergy is provided; The energy of secondary side then via the 4th diode D4 forward conducting begin to export the charging of the 4th capacitor C 4 to secondary side, the part electric current is then to load R
LEnergy is provided.Therefore, at this operation interval load R
LRequired energy is provided by main circuit entirely.
Please consult simultaneously Fig. 5 and Figure 11, Figure 11 is thin section's circuit operation schematic diagram (six) of Fig. 2.
When being in a mode of operation six (the time t of Fig. 5 for example
5~ t
6) time, transistor switch S1 still is in cut-off state.At this moment, the energy of primary side and 2 beginnings of clamp the second capacitor C are to load R
LDischarge; The energy of secondary side then via the 4th diode D4 forward conducting continue to export 4 chargings of the 4th capacitor C to secondary side, the part electric current is then to load R
LEnergy is provided.
Please consult simultaneously Fig. 5 and Figure 12, Figure 12 is thin section's circuit operation schematic diagram (seven) of Fig. 2.
When being in a mode of operation seven (the time t of Fig. 5 for example
6~ t
0) time, transistor switch S1 still is in cut-off state.When the energy of primary side was released into voltage Vc2 less than clamp the second capacitor C 2, the second diode D2 just began cut-off, and this moment, energy offered load R by clamp the second capacitor C 2
LAnd the energy of secondary side still via the 4th diode D4 forward conducting continue to secondary side to export 4 chargings of the 4th capacitor C, the part electric current is then to load R
LEnergy is provided.
From the above, power supply change-over device described in the utility model comprises following characteristics: have that high voltage gain, active clamp, low switch voltage stress, leakage inductance energy reclaim, circuit design is simple and easy and high conversion efficiency.
In sum, only the notebook utility model is deal with problems preferred embodiments or the embodiment of the technological means that adopts, is not the scope that limits the utility model patent working.Be everyly to conform to the utility model patent claim context, or change and modify according to the equalization that the utility model claim is done, be the utility model claim and contain.
Claims (6)
1. power supply change-over device is characterized in that it comprises:
One transformer, have a primary side with to a secondary side that should primary side, this primary side has a first end and one second end, this secondary side has one the 3rd end and one the 4th end;
One lateral circuits, comprise a power input unit, one transistor switch, one first electric capacity, one second electric capacity, one first diode and one second diode, this power input unit comprises one first electrode tip and one second electrode tip, this first electrode tip is electrically connected this first end, this transistor switch comprises a drain electrode end and one source pole end, this drain electrode end is electrically connected this second end, this source terminal is electrically connected this second electrode tip, one end of this first electric capacity is electrically connected this drain electrode end, the other end of this first electric capacity is electrically connected a P type abutting end of this second diode, one P type abutting end of this first diode is electrically connected this first end, one N-type abutting end of this first diode is electrically connected this P type abutting end of this second diode, one end of this second electric capacity is electrically connected this source terminal, and the other end of this second electric capacity is electrically connected a N-type abutting end of this second diode;
One secondary side circuit, comprise one the 3rd electric capacity, one the 4th electric capacity, one the 3rd diode and one the 4th diode, one end of the 3rd electric capacity is electrically connected the 3rd end, the other end of the 3rd electric capacity is electrically connected a P type abutting end of the 4th diode, one P type abutting end of the 3rd diode is electrically connected the 4th end, one N-type abutting end of the 3rd diode is electrically connected this P type abutting end of the 4th diode, one end of the 4th electric capacity is electrically connected a N-type abutting end of the 4th diode, and the other end of the 4th electric capacity is electrically connected this N-type abutting end of the 4th end and this second diode; And
One power supply output unit is connected electrically in this N-type abutting end of this second electrode tip and the 4th diode.
2. power supply change-over device as claimed in claim 1 is characterized in that, described transistor switch more comprises a gate terminal.
3. power supply change-over device as claimed in claim 2 is characterized in that, described transistor switch is a metal-oxide half field effect transistor.
4. power supply change-over device as claimed in claim 1 is characterized in that, described the first electrode tip is a positive electricity end.
5. power supply change-over device as claimed in claim 1 is characterized in that, described the second electrode tip is that a negative electricity is extreme.
6. power supply change-over device as claimed in claim 1 is characterized in that, described power supply output unit more comprises a load.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101203423 | 2012-02-24 | ||
| TW101203423U TWM433027U (en) | 2012-02-24 | 2012-02-24 | M1010701_3919 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202889200U true CN202889200U (en) | 2013-04-17 |
Family
ID=48080586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220155912 Expired - Lifetime CN202889200U (en) | 2012-02-24 | 2012-04-13 | Power supply conversion device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202889200U (en) |
| TW (1) | TWM433027U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296889A (en) * | 2012-02-24 | 2013-09-11 | 星博电子股份有限公司 | Power supply conversion device |
| CN104158402A (en) * | 2014-08-27 | 2014-11-19 | 南京国睿新能电子有限公司 | Novel boost switching power supply |
| EP3070829A4 (en) * | 2013-11-14 | 2017-06-14 | Hep Tech Co. Ltd. | Isolated ac-dc conversion device and conversion method thereof |
-
2012
- 2012-02-24 TW TW101203423U patent/TWM433027U/en unknown
- 2012-04-13 CN CN 201220155912 patent/CN202889200U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296889A (en) * | 2012-02-24 | 2013-09-11 | 星博电子股份有限公司 | Power supply conversion device |
| CN103296889B (en) * | 2012-02-24 | 2015-07-29 | 星博电子股份有限公司 | Power supply conversion device |
| EP3070829A4 (en) * | 2013-11-14 | 2017-06-14 | Hep Tech Co. Ltd. | Isolated ac-dc conversion device and conversion method thereof |
| CN104158402A (en) * | 2014-08-27 | 2014-11-19 | 南京国睿新能电子有限公司 | Novel boost switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM433027U (en) | 2012-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20150729 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20150729 |
|
| RGAV | Abandon patent right to avoid regrant |