CN101877547B - Double-power supply convertor - Google Patents
Double-power supply convertor Download PDFInfo
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- CN101877547B CN101877547B CN201010216575A CN201010216575A CN101877547B CN 101877547 B CN101877547 B CN 101877547B CN 201010216575 A CN201010216575 A CN 201010216575A CN 201010216575 A CN201010216575 A CN 201010216575A CN 101877547 B CN101877547 B CN 101877547B
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Abstract
The invention discloses a double-power supply convertor, the primary side of which is provided with a primary winding A and a primary winding B; a voltage selection circuit of the double-power supply convertor is used for leading the voltage input at a higher voltage input end to be switched on with the primary winding A with a larger number of turns, or leading the voltage input at a lower voltage input end to be accounted into the primary winding B a smaller number of turns, so that higher duty ratio can be still maintained when the voltage of the higher voltage input end is input into the convertor, and the technical problem that intermittent oscillation and large output ripple are easily caused can be solved. The double-power supply convertor has simple structure, strong adaptivity, high reliability and low cost.
Description
Technical field
The present invention relates to the converter of dual power supply, be specifically related to be used for the converter of communication base station.
Background technology
The power supply of communication base station electric power system comprises first accessory power supply and second level accessory power supply (being also referred to as second converter) usually; Wherein second converter is road output and two the power supply power supplies of system's busbar by first accessory power supply; Both get high voltage as input voltage, can let module under the situation that the PFC or the dcdc converter of first accessory power supply are exported fault, guarantee that communication is normal.In communication base station system power supply in the past, two input voltages of second converter are more or less the same, and can realize through a winding of same transformer.
The interchange UPS that high-voltage DC UPS is more traditional can obviously improve the efficient and the reliability of whole system, reduces the cost of system simultaneously, has bright market prospects.The output voltage of high-voltage DC UPS is 5 times of the 48V system even higher in the past; Though second level accessory power supply still can adopt two voltages to import original scheme of shared same former limit winding; But when high pressure was imported, the second converter duty ratio was very little, causes intermittent concussion easily; And this moment, the secondary capacitor discharge time was long, and output ripple is big.Therefore, original second converter and be not suitable for the occasion of input voltage range broad.
Summary of the invention
The invention is intended to overcome above-mentioned prior art existence when high pressure is imported, be prone to cause intermittent concussion and the deficiency that the secondary capacitor discharge time is long, output ripple is big, a kind of converter that is applicable to the dual power supply of wide range input voltage is provided.
The converter of dual power supply of the present invention; Comprise voltage input circuit, transformer and voltage follower circuit; Said transformer comprises former limit winding and secondary winding; Said voltage input circuit comprises two voltage input ends, switching tube, voltage selecting circuit, and said voltage selecting circuit optionally inserts said former limit winding, switching tube with voltage the higher person in two voltage input ends; Said voltage follower circuit connects the secondary winding, and said voltage follower circuit comprises rectifier cell and filter element; Wherein: said two voltage input ends comprise high voltage input and low voltage input; Said former limit winding comprises former limit winding A and two windings of former limit winding B, and the wherein said former limit winding A number of turn is greater than the said former limit winding B number of turn; When the voltage of high voltage input was higher than the voltage of low voltage input, said voltage selecting circuit inserted said switching tube, former limit winding A with the high voltage input; When the electric voltage dropping of high voltage input, when promptly the voltage of high voltage input was lower than the voltage of low voltage input, said voltage selecting circuit inserted said switching tube, former limit winding B with the high voltage input.
Further, said former limit winding A is that the additional winding of said former limit winding B serial connection constitutes; Perhaps said former limit winding B is the winding that tap is drawn on said former limit winding A.
Further, said voltage selecting circuit is the diode circuit that is connected between high voltage input/low voltage input and the former limit former limit of the winding A/ winding B.
Further, the converter of said dual power supply is an inverse excitation type converter.
Further, the converter of said dual power supply is the positive activation type converter; Further, the converter of said dual power supply is the positive activation type converter that has the winding that resets; The converter of said dual power supply can also be have capacitance-resistance, diode reset the positive activation type converter.
Former limit winding A that the voltage access number of turn that the converter of dual power supply provided by the invention is imported the high voltage input through voltage selecting circuit is big or the voltage that the low voltage input is imported count the little former limit winding B of the number of turn; When making the voltage input translator of high voltage input terminal; Still keep bigger duty ratio; Thereby solved and caused intermittent concussion, the technical problem that output ripple is big when the high voltage input has voltage output easily.The present invention is simple in structure, adaptivity is strong, reliability is high, cost is low.
Description of drawings
Fig. 1 is the converter one of inverse-excitation type dual power supply;
Fig. 2 is the converter two of inverse-excitation type dual power supply;
Fig. 3 is the converter one of positive activation type dual power supply;
Fig. 4 is the converter two of positive activation type dual power supply;
Fig. 5 is the converter three of positive activation type dual power supply;
Fig. 6 is the converter four of positive activation type dual power supply.
Embodiment
The converter of inverse-excitation type dual power supply; As shown in Figure 1; Comprise voltage input circuit, transformer and voltage follower circuit; Transformer comprises former limit winding and secondary winding, and voltage input circuit comprises two voltage input ends of high voltage input HV and low voltage defeated end LV, switching tube S1, voltage selecting circuit, and voltage selecting circuit is through diode D1 and diode D2 realization.Voltage selecting circuit optionally inserts former limit winding, switching tube S1 with voltage the higher person in high voltage input HV and two voltage input ends of low voltage defeated end LV; Particularly, when the voltage of high voltage input HV was higher than the voltage of the defeated end of low voltage LV, diode D1 conducting and diode D2 ends made high voltage input HV and former limit winding A, switching tube S1 conducting; And when the voltage of high voltage input HV is lower than the voltage of the defeated end of low voltage LV, diode D1 by and diode D2 conducting makes low voltage input LV and former limit winding B, switching tube S1 conducting; Former limit winding B is specially the m3-p3 winding; Former limit winding A is specially the winding of connecting of former limit winding B and additional winding, i.e. m3-p3, the m4-p4 winding of connecting.Comprise three groups of voltage outputs in the present embodiment; Be two secondary windings of m1-p1 and m2-p2, two voltage follower circuits; Wherein one road voltage follower circuit is made up of secondary winding m1-p1, rectifier cell D3 and filter element C2; This voltage is output as the primary feedback branch road, forms the switching signal of switching tube S1 later on through voltage regulator circuit; Another road voltage follower circuit is made up of secondary winding m2-p2, rectifier cell D4, rectification original paper D5 and filtering original paper C1; This voltage follower circuit is the control chip power supply, and control chip is not shown in Fig. 1, this S1 conducting of control chip control switch pipe or disconnection; During switching tube S1 conducting; The leakage inductance storage power of transformer when switching tube S1 closes section, is discharged into secondary with energy; Last road circuit output is made up of secondary winding m5-p5, can be other circuit supply.
In the foregoing circuit, when high voltage input HV and former limit winding A power supply, former secondary winding turns is than increasing, and converter can be with bigger duty ratio work; When electric voltage dropping, low voltage input LV and the former limit winding B of high voltage input HV supplied power, the former secondary turn ratio of transformer was less, but because input is lower, can guarantee that equally converter is operated near the bigger duty ratio.
Embodiment 2
The converter of inverse-excitation type dual power supply, as shown in Figure 2, present embodiment and embodiment 1 are basic identical, and difference is that former limit winding B tap on former limit winding A draws.
The converter of positive activation type dual power supply, as shown in Figure 3, present embodiment and embodiment 1 are basic identical, and difference is that this circuit is the inverse excitation type converter that has the winding Nr that resets.
Embodiment 4
The converter of positive activation type dual power supply, as shown in Figure 4, present embodiment and embodiment 3 are basic identical, and difference is that this circuit is the inverse excitation type converter that has capacitance-resistance, diode reset.
Embodiment 5
The converter of positive activation type dual power supply, as shown in Figure 5, present embodiment and embodiment 3 are basic identical, and difference is that former limit winding B tap on former limit winding A draws.
Embodiment 6
The converter of positive activation type dual power supply, as shown in Figure 6, present embodiment and embodiment 4 are basic identical, and difference is that former limit winding B tap on former limit winding A draws.
Above content is to combine practical implementation embodiment to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (8)
1. the converter of a dual power supply; Comprise voltage input circuit, transformer and voltage follower circuit; Said transformer comprises former limit winding and secondary winding; Said voltage input circuit comprises two voltage input ends, switching tube, voltage selecting circuit, and said voltage selecting circuit optionally inserts said former limit winding, switching tube with voltage the higher person in said two voltage input ends; Said voltage follower circuit connects said secondary winding, and said voltage follower circuit comprises rectifier cell and filter element; It is characterized in that: said two voltage input ends comprise high voltage input and low voltage input; Said former limit winding comprises former limit winding A and two windings of former limit winding B, and its limit, Central Plains winding A number of turn is greater than the former limit winding B number of turn; When the voltage of high voltage input was higher than the voltage of low voltage input, said voltage selecting circuit inserted said switching tube, former limit winding A with the high voltage input; When the electric voltage dropping of high voltage input, when promptly the voltage of high voltage input was lower than the voltage of low voltage input, said voltage selecting circuit inserted said switching tube, former limit winding B with the low voltage input.
2. the converter of dual power supply according to claim 1, it is characterized in that: said voltage selecting circuit is the diode circuit that is connected between said high voltage input/low voltage input and the said former limit former limit of the winding A/ winding B.
3. the converter of dual power supply according to claim 1, it is characterized in that: the converter of said dual power supply is an inverse excitation type converter.
4. the converter of dual power supply according to claim 1, it is characterized in that: the converter of said dual power supply is the positive activation type converter.
5. the converter of dual power supply according to claim 4, it is characterized in that: the converter of said dual power supply is the positive activation type converter that has the winding that resets.
6. the converter of dual power supply according to claim 4, it is characterized in that: the converter of said dual power supply is the positive activation type converter that has capacitance-resistance, diode reset.
7. according to the converter of any described dual power supply of claim 1～6, it is characterized in that: said former limit winding A is that the additional winding of said former limit winding B serial connection constitutes.
8. according to the converter of any described dual power supply of claim 1～6, it is characterized in that: said former limit winding B is the winding that tap is drawn on said former limit winding A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010216575A CN101877547B (en) | 2010-07-05 | 2010-07-05 | Double-power supply convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010216575A CN101877547B (en) | 2010-07-05 | 2010-07-05 | Double-power supply convertor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877547A CN101877547A (en) | 2010-11-03 |
| CN101877547B true CN101877547B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010216575A Active CN101877547B (en) | 2010-07-05 | 2010-07-05 | Double-power supply convertor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545657B (en) * | 2010-12-21 | 2014-07-09 | 广东易事特电源股份有限公司 | Input rectification circuit for auxiliary power supply |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3717668B2 (en) * | 1998-05-29 | 2005-11-16 | 三洋電機株式会社 | Power supply circuit and electrical equipment |
| JP2001161028A (en) * | 1999-11-30 | 2001-06-12 | Matsushita Electric Ind Co Ltd | Dc power unit |
| JP2009273335A (en) * | 2008-05-12 | 2009-11-19 | Nichicon Corp | Power supply apparatus |
-
2010
- 2010-07-05 CN CN201010216575A patent/CN101877547B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| JP特开2001-161028A 2001.06.12 |
| JP特开2009-273335A 2009.11.19 |
| JP特开平11-345031A 1999.12.14 |
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| CN101877547A (en) | 2010-11-03 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |