CN202535276U - Power supply conversion device - Google Patents
Power supply conversion device Download PDFInfo
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- CN202535276U CN202535276U CN2012200510744U CN201220051074U CN202535276U CN 202535276 U CN202535276 U CN 202535276U CN 2012200510744 U CN2012200510744 U CN 2012200510744U CN 201220051074 U CN201220051074 U CN 201220051074U CN 202535276 U CN202535276 U CN 202535276U
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- power supply
- accessory power
- conversion apparatus
- electric power
- power conversion
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Abstract
A power supply conversion device comprises a pre-stage conversion circuit, a direct-direct conversion circuit, an auxiliary power supply conversion circuit and a switching circuit. The pre-stage conversion circuit is used to receive an input voltage, and carries out conversion on the input voltage so as to generate a middle voltage. The direct-direct conversion circuit is used to receive the middle voltage, and generates a second auxiliary power supply besides generating an output voltage of a power supply. The auxiliary power supply conversion circuit is used to receive the middle voltage, and carries out conversion on the medium voltage so as to generate a first auxiliary power supply. The switching circuit is used to receive the first auxiliary power supply and the second auxiliary power supply. When the power supply conversion device is in the normal operation state, the switching circuit outputs the second auxiliary power supply as an auxiliary power supply, and makes the auxiliary power supply conversion circuit work in a standby mode. When the power supply conversion device is in the non-normal operation state, the auxiliary power supply conversion circuit works in an operation state, and the switching circuit outputs the first auxiliary power supply as the auxiliary power supply.
Description
Technical field
The present invention relates to a kind of electric power conversion apparatus, be specifically related to reduce the device of electric power conversion apparatus electromagnetic interference.
Background technology
Switching Power Supply generally all adopts pulse modulation technique, is characterized in that frequency is high, power density is high, reliability is high, also has advantages such as volume is little, in light weight in addition, therefore by extensively utilization.Yet; Because switching device is operated in the high frequency on off operating mode; The fast transient process of high frequency itself is exactly an electromagnetic interference source, and EMI (electromagnetic interference) signal that he produces has very wide frequency range, and certain amplitude is arranged again; Pollute electromagnetic environment through conduction and radiation meeting, communication equipment and electronic product are caused interference.
Be illustrated in figure 1 as a known technology, utilize auxiliary source to provide boost voltage to use for control loop among the figure, owing to used Switching Power Supply in the accessory power supply, switching tube is in the high frequency on off operating mode, thereby can pollute electromagnetic environment.
Therefore,, and be badly in need of wanting a kind of new technical solution, can reach the purpose of low electromagnetic interference based on the shortcoming of above-mentioned prior art.
Summary of the invention
Based on above goal of the invention, the present invention provides following technical scheme:
A kind of electric power conversion apparatus comprises prime translation circuit, straight translation circuit, accessory power supply translation circuit, it is characterized in that:
Said prime translation circuit is accepted input voltage, and said input voltage changed and exports intermediate voltage;
Said straight translation circuit is connected in the output of said prime translation circuit, accepts said intermediate voltage, and said intermediate voltage is changed generation second accessory power supply;
Said accessory power supply translation circuit is connected in the output of said prime translation circuit, accepts said intermediate voltage, and said intermediate voltage changed and produces first accessory power supply;
Said commutation circuit is connected in the output of said straight translation circuit and said accessory power supply translation circuit, accepts said first accessory power supply and said second accessory power supply, and switches said first accessory power supply of output and said second accessory power supply.
Said straight straight translation circuit is changed said intermediate voltage and is produced the output voltage of power supply.
Above-mentioned commutation circuit comprises:
One first diode, its anode is in order to accept said first accessory power supply;
One second diode, its anode is in order to accept said second accessory power supply;
Wherein, the negative electrode of said first, second diode is coupled in together to export this first or second accessory power supply.
When above-mentioned electric power conversion apparatus was in the normal operation state, the said second accessory power supply amplitude was greater than the said first accessory power supply amplitude, to such an extent as to said second diode transmits said second accessory power supply with the accessory power supply as this electric power conversion apparatus.
Above-mentioned second auxiliary source is during as the auxiliary source of this electric power conversion apparatus, and said accessory power supply translation circuit is accepted accessory power supply driving governor Control work in (stand-by) pattern of awaiting orders.
When above-mentioned electric power conversion apparatus was in improper operating state, the said first accessory power supply amplitude was greater than the said second accessory power supply amplitude, to such an extent as to said first diode transmits said first accessory power supply with the accessory power supply as this electric power conversion apparatus.
Above-mentioned first auxiliary source is during as the auxiliary source of this electric power conversion apparatus, and said accessory power supply translation circuit is operated in operating mode.
Above-mentioned commutation circuit can also be made up of following device:
One first switching tube, its first end is in order to accept said first accessory power supply, and its control end is then in order to accept one first control signal;
One second switch pipe, its first end is in order to accept said second accessory power supply, and its control end is then in order to accept one second control signal;
Wherein, second end of said first, second switching tube is coupled in together to export this first or second accessory power supply.
When above-mentioned electric power conversion apparatus was in operating state, said second switch tube reaction was in this said second control signal and open-minded, and said first switching tube reacts on said first control signal and turn-off.
When above-mentioned electric power conversion apparatus was in operating state, said accessory power supply driving governor reacted on said first control signal and the accessory power supply translation circuit is worked in await orders (stand-by) pattern.
When above-mentioned electric power conversion apparatus was in improper operating state, said first switching tube reacted on this said first control signal and is open-minded, and said second switch tube reaction turn-offs in said second control signal.
When above-mentioned electric power conversion apparatus was in operating state, said accessory power supply driving governor reacted on said first control signal and makes the accessory power supply translation circuit work in operating mode.
Above-mentioned straight translation circuit also can be the multi-stage transformation circuit.
Technical scheme proposed by the invention is when the power supply operate as normal; Utilize main circuit output to replace accessory power supply output boost voltage; Can make accessory power supply when the power supply operate as normal, be in (stand-by) pattern of awaiting orders thus; Thereby the linear switching frequency that has reduced its main switch, the electromagnetic interference of electric power conversion apparatus is reduced, can improve electric power conversion apparatus efficient simultaneously.
Description of drawings
Fig. 1 is a known technology structure chart.
Fig. 2 is a structure chart of the present invention.
Fig. 3 is the oscillogram of key point VCC1 and PWM among Fig. 2.
Fig. 4 A is the commutation circuit figure of the embodiment of the invention one.
Fig. 4 B is the commutation circuit figure of the embodiment of the invention two.
Fig. 5 is first specific embodiment of the present invention.
Fig. 6 is second specific embodiment of the present invention.
Fig. 7 is the 3rd specific embodiment of the present invention.
Embodiment
Example embodiment shown in the description describes the invention execution mode.What deserves to be mentioned is at this; Technical scheme proposed by the invention is when the power supply operate as normal; Utilization utilizes main circuit output to replace accessory power supply output boost voltage, can make accessory power supply when the power supply operate as normal, be in (stand-by) pattern of awaiting orders thus, thereby the linear switching frequency that has reduced its main switch; The electromagnetic interference of electric power conversion apparatus is reduced, can improve electric power conversion apparatus efficient simultaneously.
Based on this idea; Shown in Figure 2ly be the structure chart of the present invention's one example embodiment, this electric power conversion apparatus comprises: prime translation circuit (1), straight translation circuit (2), accessory power supply translation circuit (3), commutation circuit (4) and accessory power supply driving governor (5).
Prime translation circuit (1) is in order to accepting an input voltage in the present embodiment, and this input voltage changed and produces an intermediate voltage V
BusStraight translation circuit (2) is in order to accept this intermediate voltage V
Bus, and to this intermediate voltage V
BusChange and produce the second accessory power supply VCC2, and the main VOUT that exports; Accessory power supply translation circuit (3) is in order to accepting this intermediate voltage, and this intermediate voltage changed and produces the first accessory power supply VCC1; Commutation circuit (4) is in order to accept this first accessory power supply VCC1 and this second accessory power supply VCC2; And when this electric power conversion apparatus is in operating state; Commutation circuit (4) is exported this second accessory power supply VCC2 as accessory power supply VCC, and utilizes accessory power supply driving governor (5) to make this accessory power supply translation circuit (3) work in (stand-by) pattern of awaiting orders; And when this electric power conversion apparatus was in improper operating state, like states such as start, standby, load saltus steps, this accessory power supply translation circuit (3) worked in operating state, and commutation circuit (4) is exported this first accessory power supply as accessory power supply.
When said electric power conversion apparatus was in operating state, said accessory power supply driving governor reacted on control signal P
ONAnd the accessory power supply translation circuit is worked in await orders (stand-by) pattern.
Shown in Figure 3 for accessory power supply translation circuit (3) works in when awaiting orders (stand-by) pattern the oscillogram of key point in the circuit, comprise the waveform of the output PWM of the first accessory power supply voltage VCC1 and accessory power supply driving governor (5).Wherein PWM is the control signal of main switch in the accessory power supply; This shows; When awaiting orders (stand-by) pattern; Effectively perhaps losing efficacy of the output pulse period property of accessory power supply driving governor (5) can be realized under the constant frequency through reducing the electromagnetic interference that the switch number of times reduces power converting circuit like this.
Fig. 4 A and Fig. 4 B are (4) two kinds of execution modes of commutation circuit of the present invention.Commutation circuit shown in Fig. 4 A (4) comprising: diode D1 and D2, diode D1 anode accept the said first accessory power supply VCC1; Diode D2 anode is accepted the said second accessory power supply VCC2.The negative electrode of diode D1 and D2 is coupled in together to export this first or second accessory power supply as accessory power supply VCC.
When electric power conversion apparatus was in operating state, the said second accessory power supply VCC2 amplitude was greater than the said first accessory power supply VCC1 amplitude, to such an extent as to said diode D2 transmits the said second accessory power supply VCC2 with the accessory power supply VCC as this electric power conversion apparatus.
When said electric power conversion apparatus is in improper operating state; Like states such as start, standby, load saltus steps; The said first accessory power supply VCC1 amplitude is greater than the said second accessory power supply VCC2 amplitude, to such an extent as to said diode D1 transmits the said first accessory power supply VCC1 with the accessory power supply VCC as this electric power conversion apparatus.
Be depicted as the another kind of execution mode of commutation circuit (4) like Fig. 4 B, it is made up of switching tube Q1 and Q2, and switching tube Q1 grid is in order to accept the said first accessory power supply VCC1, and its control end is then in order to accept control signal CS1; Switching tube Q2, its grid is in order to accept the said second accessory power supply VCC2, and its control end is then in order to accept control signal CS2; The grid that closes pipe Q1 and Q2 is coupled in together to export this first or second accessory power supply as accessory power supply VCC.
When electric power conversion apparatus was in operating state, switching tube Q2 reacted on this said control signal CS2 and is open-minded, and said switching tube Q1 reacts on the said first control signal CS1 and turn-off.When electric power conversion apparatus was in improper operating state, like states such as start, standby, load saltus steps, switching tube Q1 reacted on control signal CS1 and open-minded, and switching tube Q2 reacts on control signal CS2 and turn-offs.CS1 and CS2 are complementary relationship, and CS2 and P
ONIdentical.
More particularly, shown in Figure 5, prime translation circuit (1) is made up of rectifier bridge (11) and circuit of power factor correction (12) series connection; Comprise circuit 21 in the straight translation circuit (2), it is made up of auxiliary winding AUX, diode D, capacitor C, wherein; Isolating transformer T couples in auxiliary winding AUX and the straight translation circuit; Auxiliary winding AUX first end links to each other with diode D anode, and second end links to each other with negative terminal, and the negative electrode of diode D links to each other with first end of capacitor C; Second end of capacitor C links to each other with this negative terminal, and the voltage at capacitor C two ends is as the second accessory power supply VCC2.In addition, the accessory power supply translation circuit can comprise transformer T2 for anti exciting converter (3); The absorption circuit that its former limit parallel connection is made up of resistance R 1, capacitor C 1 and diode D3; Be connected in series TOPswitch then, secondary first end of transformer T2 links to each other with the anode of a diode D4, and second end links to each other with output ground; A parallelly connected then output filter capacitor C2, and its first end is connected with commutation circuit.And isolate transmission formation Pon with control TOPswitch through optocoupler U1 after detecting the first end electric current.
When electric power conversion apparatus was in operating state, commutation circuit was transmitted the accessory power supply VCC of the second accessory power supply VCC2 as this electric power conversion apparatus.Thereby the accessory power supply translation circuit is in light condition and is shown as signal Pon, and TOPswitch reacts on Pon control anti exciting converter (3) and works in (stand-by) pattern of awaiting orders.Shown in Figure 6 is another kind of specific embodiment of the present invention, wherein circuit 13 be one with Fig. 5 in the identical circuit of circuit 21 structures, in the present embodiment, inductance L coupling in auxiliary winding AUX and the circuit of power factor correction (12), thereby export VCC2.Shown in Figure 7 is another kind of specific embodiment of the present invention, and wherein straight translation circuit (2) is made up of the multi-stage transformation circuit.
Claims (13)
1. an electric power conversion apparatus comprises prime translation circuit, straight translation circuit, accessory power supply translation circuit, it is characterized in that:
Said prime translation circuit is accepted input voltage, and said input voltage changed and exports intermediate voltage;
Said straight translation circuit is connected in the output of said prime translation circuit, accepts said intermediate voltage, and said intermediate voltage is changed generation second accessory power supply;
Said accessory power supply translation circuit is connected in the output of said prime translation circuit, accepts said intermediate voltage, and said intermediate voltage changed and produces first accessory power supply;
Said commutation circuit is connected in the output of said straight translation circuit and said accessory power supply translation circuit, accepts said first accessory power supply and said second accessory power supply, and switches said first accessory power supply of output and said second accessory power supply.
2. a kind of according to claim 1 electric power conversion apparatus, said straight straight translation circuit are changed said intermediate voltage and are produced the output voltage of power supply.
3. a kind of according to claim 1 electric power conversion apparatus, wherein said commutation circuit comprises:
One first diode, its anode is in order to accept said first accessory power supply;
One second diode, its anode is in order to accept said second accessory power supply;
Wherein, the negative electrode of said first, second diode is coupled in together to export this first or second accessory power supply.
4. like the said a kind of electric power conversion apparatus of claim 3; Wherein when said electric power conversion apparatus is in the normal operation state; The said second accessory power supply amplitude is greater than the said first accessory power supply amplitude, to such an extent as to said second diode transmits said second accessory power supply with the accessory power supply as this electric power conversion apparatus.
5. like the said a kind of electric power conversion apparatus of claim 4, wherein when said second auxiliary source during as the auxiliary source of this electric power conversion apparatus, said accessory power supply translation circuit is accepted accessory power supply driving governor Control work at standby.
6. like the said a kind of electric power conversion apparatus of claim 3; Wherein when said electric power conversion apparatus is in improper operating state; The said first accessory power supply amplitude is greater than the said second accessory power supply amplitude, to such an extent as to said first diode transmits said first accessory power supply with the accessory power supply as this electric power conversion apparatus.
7. like the said a kind of electric power conversion apparatus of claim 6, wherein when said first auxiliary source during as the auxiliary source of this electric power conversion apparatus, said accessory power supply translation circuit is operated in operating mode.
8. a kind of according to claim 1 electric power conversion apparatus, wherein said commutation circuit comprises:
One first switching tube, its first end is in order to accept said first accessory power supply, and its control end is then in order to accept one first control signal;
One second switch pipe, its first end is in order to accept said second accessory power supply, and its control end is then in order to accept one second control signal;
Wherein, second end of said first, second switching tube is coupled in together to export this first or second accessory power supply.
9. like the said a kind of electric power conversion apparatus of claim 8; Wherein when said electric power conversion apparatus is in operating state; Said second switch tube reaction is in this said second control signal and open-minded, and said first switching tube reacts on said first control signal and turn-off.
10. like the said a kind of electric power conversion apparatus of claim 9, wherein when said electric power conversion apparatus was in operating state, said accessory power supply driving governor reacted on said first control signal and makes the accessory power supply translation circuit work in standby.
11. like the said a kind of electric power conversion apparatus of claim 8; Wherein when said electric power conversion apparatus is in improper operating state; Said first switching tube reacts on this said first control signal and is open-minded, and said second switch tube reaction turn-offs in said second control signal.
12. like the said a kind of electric power conversion apparatus of claim 11, wherein when said electric power conversion apparatus was in operating state, said accessory power supply driving governor reacted on said first control signal and makes the accessory power supply translation circuit work in operating mode.
13. a kind of according to claim 1 electric power conversion apparatus, wherein said straight translation circuit is the multi-stage transformation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200510744U CN202535276U (en) | 2012-02-17 | 2012-02-17 | Power supply conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200510744U CN202535276U (en) | 2012-02-17 | 2012-02-17 | Power supply conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202535276U true CN202535276U (en) | 2012-11-14 |
Family
ID=47136432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200510744U Expired - Fee Related CN202535276U (en) | 2012-02-17 | 2012-02-17 | Power supply conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202535276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259411A (en) * | 2012-02-17 | 2013-08-21 | 南京博兰得电子科技有限公司 | Power supply converting device |
| CN104682725A (en) * | 2013-11-27 | 2015-06-03 | 华为技术有限公司 | Control method and control circuit for standby power consumption of power supply module and power supply module |
-
2012
- 2012-02-17 CN CN2012200510744U patent/CN202535276U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259411A (en) * | 2012-02-17 | 2013-08-21 | 南京博兰得电子科技有限公司 | Power supply converting device |
| CN103259411B (en) * | 2012-02-17 | 2016-03-09 | 南京博兰得电子科技有限公司 | A kind of electric power conversion apparatus |
| CN104682725A (en) * | 2013-11-27 | 2015-06-03 | 华为技术有限公司 | Control method and control circuit for standby power consumption of power supply module and power supply module |
| CN104682725B (en) * | 2013-11-27 | 2017-07-28 | 华为技术有限公司 | The control method and circuit, power module of a kind of power module stand-by power consumption |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20170217 |