CN103259411B - A kind of electric power conversion apparatus - Google Patents
A kind of electric power conversion apparatus Download PDFInfo
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- CN103259411B CN103259411B CN201210035398.3A CN201210035398A CN103259411B CN 103259411 B CN103259411 B CN 103259411B CN 201210035398 A CN201210035398 A CN 201210035398A CN 103259411 B CN103259411 B CN 103259411B
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- power supply
- accessory power
- conversion apparatus
- electric power
- translation circuit
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Abstract
A kind of electric power conversion apparatus, this electric power conversion apparatus comprises: prime translation circuit, straight translation circuit, accessory power supply translation circuit and commutation circuit.Prime translation circuit in order to accept an input voltage, and is changed this input voltage and produces an intermediate voltage; Straight translation circuit, in order to accept this intermediate voltage, except producing the output voltage of power supply, also produces the second accessory power supply; Accessory power supply translation circuit, in order to accept this intermediate voltage, and changes this intermediate voltage and produces the first accessory power supply; Commutation circuit, in order to accept this first accessory power supply and this second accessory power supply, and when this electric power conversion apparatus is in normal operating conditions, commutation circuit exports this second accessory power supply as accessory power supply, and this accessory power supply translation circuit is made to work in (standby) pattern of awaiting orders; And when this power converting circuit is in improper operating state, this accessory power supply translation circuit works in operating state, commutation circuit exports this first accessory power supply as accessory power supply.
Description
Technical field
The present invention relates to a kind of electric power conversion apparatus, be specifically related to the device reducing 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 the advantages such as volume is little, lightweight in addition, is therefore widely used.But, because switching device is operated in high frequency on off operating mode, the high speed instantaneous course inherently electromagnetic interference source of high frequency, the EMI(electromagnetic interference that he produces) signal has very wide frequency range, there is again certain amplitude, can electromagnetic environment be polluted through conduction and radiation, interference is caused to communication equipment and electronic product.
Be illustrated in figure 1 a known technology, utilize auxiliary source to provide boost voltage to use for control loop in figure, owing to employing Switching Power Supply in accessory power supply, switching tube is in high frequency on off operating mode, thus can pollute electromagnetic environment.
Therefore, based on the shortcoming of above-mentioned prior art, and be badly in need of wanting a kind of new technical solution, the object of low EMI can be reached.
Summary of the invention
Based on above goal of the invention, the 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:
Described prime translation circuit accepts input voltage, and changes described input voltage and export intermediate voltage;
Described straight translation circuit is connected to the output of described prime translation circuit, accepts described intermediate voltage, and carries out conversion generation second accessory power supply to described intermediate voltage;
Described accessory power supply translation circuit is connected to the output of described prime translation circuit, accepts described intermediate voltage, and changes described intermediate voltage and produce the first accessory power supply;
Described commutation circuit is connected to the output of described straight translation circuit and described accessory power supply translation circuit, accepts described first accessory power supply and described second accessory power supply, and switches described first accessory power supply of output and described second accessory power supply.
Described straight translation circuit is changed described intermediate voltage and produces the output voltage of power supply.
Above-mentioned commutation circuit comprises:
One first diode, its anode is in order to accept described first accessory power supply;
One second diode, its anode is in order to accept described second accessory power supply;
Wherein, the negative electrode of first, second diode described is coupled in together to export this first or second accessory power supply.
When above-mentioned electric power conversion apparatus is in normal operating conditions, described second accessory power supply amplitude is greater than described first accessory power supply amplitude, to such an extent as to described second accessory power supply of described second diode transmission is using the accessory power supply as this electric power conversion apparatus.
During the auxiliary source of above-mentioned second auxiliary source as this electric power conversion apparatus, described accessory power supply translation circuit accepts accessory power supply driving governor and controls to be operated in (stand-by) pattern of awaiting orders.
When above-mentioned electric power conversion apparatus is in improper operating state, described first accessory power supply amplitude is greater than described second accessory power supply amplitude, to such an extent as to described first accessory power supply of described first diode transmission is using the accessory power supply as this electric power conversion apparatus.
During the auxiliary source of above-mentioned first auxiliary source as this electric power conversion apparatus, described 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 described 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 described second accessory power supply, and its control end is then in order to accept one second control signal;
Wherein, the second end of first, second switching tube described is coupled in together to export this first or second accessory power supply.
When above-mentioned electric power conversion apparatus is in operating state, described second switch tube reaction is open-minded in the second control signal described in this, and described first switching tube reacts on described first control signal and turns off.
When above-mentioned electric power conversion apparatus is in operating state, described accessory power supply driving governor reacts on described first control signal and accessory power supply translation circuit is worked in await orders (stand-by) pattern.
When above-mentioned electric power conversion apparatus is in improper operating state, described first switching tube reacts on the first control signal described in this and open-minded, and described second switch tube reaction turns off in described second control signal.
When above-mentioned electric power conversion apparatus is in operating state, described accessory power supply driving governor reacts on described first control signal and makes accessory power supply translation circuit work in operating mode.
Above-mentioned straight translation circuit also can be multi-stage transformation circuit.
Technical scheme proposed by the invention is when power supply normally works, utilize main circuit to export and replace accessory power supply to export boost voltage, accessory power supply can be made when power supply normally works thus to be in (stand-by) pattern of awaiting orders, thus the switching frequency of its main switch is linearly reduced, the electromagnetic interference of electric power conversion apparatus is reduced, electric power conversion apparatus efficiency can be improved simultaneously.
Accompanying drawing explanation
Fig. 1 is a known technology structure chart.
Fig. 2 is structure chart of the present invention.
Fig. 3 is the oscillogram of key point VCC1 and PWM in Fig. 2.
Fig. 4 A is the commutation circuit figure of the embodiment of the present invention one.
Fig. 4 B is the commutation circuit figure of the embodiment of the present invention two.
Fig. 5 is the first specific embodiment of the present invention.
Fig. 6 is the second specific embodiment of the present invention.
Fig. 7 is the 3rd specific embodiment of the present invention.
Embodiment
One exemplary embodiment shown in description, is described invention execution mode.It is worth mentioning that at this, technical scheme proposed by the invention is when power supply normally works, utilization utilizes main circuit to export replacement accessory power supply and exports boost voltage, accessory power supply can be made when power supply normally works thus to be in (stand-by) pattern of awaiting orders, thus the switching frequency of its main switch is linearly reduced, the electromagnetic interference of electric power conversion apparatus is reduced, electric power conversion apparatus efficiency can be improved simultaneously.
Based on this idea, Figure 2 shows that the structure chart of the present invention one one exemplary 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).
In the present embodiment, prime translation circuit (1) is in order to accept an input voltage, and changes this input voltage and produce an intermediate voltage V
bus; Straight translation circuit (2) is in order to accept this intermediate voltage V
bus, and to this intermediate voltage V
buscarry out changing and producing the second accessory power supply VCC2, and main output VOUT; Accessory power supply translation circuit (3) in order to accept this intermediate voltage, and is changed this intermediate voltage 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) exports 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 is in improper operating state, as states such as start, standby, load jump, this accessory power supply translation circuit (3) works in operating state, and commutation circuit (4) exports this first accessory power supply as accessory power supply.
When described electric power conversion apparatus is in operating state, described accessory power supply driving governor reacts on control signal P
oNand accessory power supply translation circuit is worked in await orders (stand-by) pattern.
Figure 3 shows that accessory power supply translation circuit (3) works in the oscillogram of key point in circuit when awaiting orders (stand-by) pattern, 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 accessory power supply, as can be seen here, during (stand-by) pattern of awaiting orders, effective or the inefficacy of the output pulse periodic of accessory power supply driving governor (5), passes through under can realizing constant frequency like this to reduce the electromagnetic interference that on-off times reduces power converting circuit.
Fig. 4 A and Fig. 4 B is commutation circuit of the present invention (4) two kinds of execution modes.Commutation circuit (4) comprising as shown in Figure 4 A: diode D1 and D2, and diode D1 anode accepts described first accessory power supply VCC1; Diode D2 anode accepts described second accessory power supply VCC2.To export this first or second accessory power supply as accessory power supply VCC together with the negative electrode of diode D1 with D2 is coupled in.
When electric power conversion apparatus is in operating state, described second accessory power supply VCC2 amplitude is greater than described first accessory power supply VCC1 amplitude, to such an extent as to described diode D2 transmits described second accessory power supply VCC2 using the accessory power supply VCC as this electric power conversion apparatus.
When described electric power conversion apparatus is in improper operating state, as states such as start, standby, load jump, described first accessory power supply VCC1 amplitude is greater than described second accessory power supply VCC2 amplitude, to such an extent as to described diode D1 transmits described first accessory power supply VCC1 using the accessory power supply VCC as this electric power conversion apparatus.
Be the another kind of execution mode of commutation circuit (4) as shown in Figure 4 B, it is made up of switching tube Q1 and Q2, and switching tube Q1 grid is in order to accept described 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 described second accessory power supply VCC2, and its control end is then in order to accept control signal CS2; To export this first or second accessory power supply as accessory power supply VCC together with the grid closing pipe Q1 with Q2 is coupled in.
When electric power conversion apparatus is in operating state, switching tube Q2 reacts on control signal CS2 described in this and open-minded, and described switching tube Q1 reacts on described first control signal CS1 and turns off.When electric power conversion apparatus is in improper operating state, as states such as start, standby, load jump, switching tube Q1 reacts on control signal CS1 and open-minded, and switching tube Q2 reacts on control signal CS2 and turns off.CS1 and CS2 is complementary relation, and CS2 and P
oNidentical.
More particularly, shown in Fig. 5, prime translation circuit (1) by rectifier bridge (11) and circuit of power factor correction (12) in series, circuit 21 is comprised in straight translation circuit (2), it is by assisting winding AUX, diode D, electric capacity C is formed, wherein, auxiliary winding AUX couples with isolating transformer T in straight translation circuit, auxiliary winding AUX first end is connected with diode D anode, second end is connected with negative terminal, the negative electrode of diode D is connected with the first end of electric capacity C, second end of electric capacity C is connected with this negative terminal, the voltage at electric capacity C two ends is as the second accessory power supply VCC2.In addition, accessory power supply translation circuit can be anti exciting converter (3), comprise transformer T2, the absorbing circuit that its former limit parallel connection is made up of resistance R1, electric capacity C1 and diode D3, then be connected in series TOPswitch, the secondary first end of transformer T2 is connected with the anode of a diode D4, the second end with output be connected, then an output filter capacitor C2 in parallel, and its first end is connected with commutation circuit.And isolate transmission formation Pon with control TOPswitch through optocoupler U1 after detecting first end electric current.
When electric power conversion apparatus is in operating state, commutation circuit transmits the accessory power supply VCC of the second accessory power supply VCC2 as this electric power conversion apparatus.Thus 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.Figure 6 shows that another kind of specific embodiment of the present invention, wherein circuit 13 is a circuit identical with circuit in Fig. 5 21 structure, and in the present embodiment, auxiliary winding AUX is coupled with inductance L in circuit of power factor correction (12), thus exports VCC2.Figure 7 shows that another kind of specific embodiment of the present invention, wherein straight translation circuit (2) is made up of multi-stage transformation circuit.
Claims (13)
1. an electric power conversion apparatus, comprises prime translation circuit, straight translation circuit, accessory power supply translation circuit and commutation circuit, it is characterized in that:
Described prime translation circuit accepts input voltage, and changes described input voltage and export intermediate voltage;
Described straight translation circuit is connected to the output of described prime translation circuit, accepts described intermediate voltage, and carries out conversion generation second accessory power supply to described intermediate voltage;
Described accessory power supply translation circuit is connected to the output of described prime translation circuit, accepts described intermediate voltage, and changes described intermediate voltage and produce the first accessory power supply;
Described commutation circuit is connected to the output of described straight translation circuit and described accessory power supply translation circuit, accepts described first accessory power supply and described second accessory power supply, and switches described first accessory power supply of output and described second accessory power supply;
When described commutation circuit exports the second accessory power supply, described accessory power supply translation circuit receives a control signal, and works in standby, and described control signal is the current signal of described commutation circuit and described accessory power supply translation circuit output junction,
Described electric power conversion apparatus also comprises an accessory power supply driving governor, described accessory power supply driving governor receives described control signal, and exporting pulse for controlling the main switch in described accessory power supply translation circuit, the pulse periodic that described accessory power supply driving governor exports when described standby is effective or lost efficacy.
2. a kind of electric power conversion apparatus as claimed in claim 1, described straight translation circuit is changed described intermediate voltage and produces the output voltage of power supply.
3. a kind of electric power conversion apparatus as claimed in claim 1, wherein said commutation circuit comprises:
One first diode, its anode is in order to accept described first accessory power supply;
One second diode, its anode is in order to accept described second accessory power supply;
Wherein, the negative electrode of first, second diode described is coupled in together to export this first or second accessory power supply.
4. a kind of electric power conversion apparatus as claimed in claim 3, wherein when described electric power conversion apparatus is in normal operating conditions, described second accessory power supply amplitude is greater than described first accessory power supply amplitude, to such an extent as to described second accessory power supply of described second diode transmission is using the accessory power supply as this electric power conversion apparatus.
5. a kind of electric power conversion apparatus as claimed in claim 4, wherein when the accessory power supply of described second accessory power supply as this electric power conversion apparatus, described accessory power supply translation circuit accepts accessory power supply driving governor and controls to be operated in (stand-by) pattern of awaiting orders.
6. a kind of electric power conversion apparatus as claimed in claim 3, wherein when described electric power conversion apparatus is in improper operating state, described first accessory power supply amplitude is greater than described second accessory power supply amplitude, to such an extent as to described first accessory power supply of described first diode transmission is using the accessory power supply as this electric power conversion apparatus.
7. a kind of electric power conversion apparatus as claimed in claim 6, wherein when the accessory power supply of described first accessory power supply as this electric power conversion apparatus, described accessory power supply translation circuit is operated in operating mode.
8. a kind of electric power conversion apparatus as claimed in claim 1, wherein said commutation circuit comprises:
One first switching tube, its first end is in order to accept described 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 described second accessory power supply, and its control end is then in order to accept one second control signal;
Wherein, the second end of first, second switching tube described is coupled in together to export this first or second accessory power supply.
9. a kind of electric power conversion apparatus as claimed in claim 8, wherein when described electric power conversion apparatus is in normal operating conditions, described second switch tube reaction is open-minded in the second control signal described in this, and described first switching tube reacts on described first control signal and turns off.
10. a kind of electric power conversion apparatus as claimed in claim 9, wherein when described electric power conversion apparatus is in normal operating conditions, described accessory power supply driving governor reacts on described second control signal and accessory power supply translation circuit is worked in await orders (stand-by) pattern.
11. a kind of electric power conversion apparatus as claimed in claim 8, wherein when described electric power conversion apparatus is in improper operating state, described first switching tube reacts on the first control signal described in this and open-minded, and described second switch tube reaction turns off in described second control signal.
12. a kind of electric power conversion apparatus as claimed in claim 11, wherein when described electric power conversion apparatus is in improper operating state, described accessory power supply driving governor reacts on described second control signal and makes accessory power supply translation circuit work in operating mode.
13. a kind of electric power conversion apparatus as claimed in claim 1, wherein said straight translation circuit is multi-stage transformation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210035398.3A CN103259411B (en) | 2012-02-17 | 2012-02-17 | A kind of electric power conversion apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210035398.3A CN103259411B (en) | 2012-02-17 | 2012-02-17 | A kind of electric power conversion apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN103259411A CN103259411A (en) | 2013-08-21 |
| CN103259411B true CN103259411B (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210035398.3A Active CN103259411B (en) | 2012-02-17 | 2012-02-17 | A kind of electric power conversion apparatus |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5455758A (en) * | 1992-02-18 | 1995-10-03 | International Rectifier Corporation | Self-generating resonant power supply and method of producing power for transistor switching circuit |
| CN102063171A (en) * | 2010-12-20 | 2011-05-18 | 南京博兰得电子科技有限公司 | Device and method for improving power supply efficiency of computer |
| CN202535276U (en) * | 2012-02-17 | 2012-11-14 | 南京博兰得电子科技有限公司 | Power supply conversion device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5353119B2 (en) * | 2008-08-26 | 2013-11-27 | サンケン電気株式会社 | Switching power supply |
-
2012
- 2012-02-17 CN CN201210035398.3A patent/CN103259411B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5455758A (en) * | 1992-02-18 | 1995-10-03 | International Rectifier Corporation | Self-generating resonant power supply and method of producing power for transistor switching circuit |
| CN102063171A (en) * | 2010-12-20 | 2011-05-18 | 南京博兰得电子科技有限公司 | Device and method for improving power supply efficiency of computer |
| CN202535276U (en) * | 2012-02-17 | 2012-11-14 | 南京博兰得电子科技有限公司 | Power supply conversion device |
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| CN103259411A (en) | 2013-08-21 |
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