CN103516185A - BOOST converter and differential mode prevention surge protection circuit thereof - Google Patents
BOOST converter and differential mode prevention surge protection circuit thereof Download PDFInfo
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- CN103516185A CN103516185A CN201210215523.9A CN201210215523A CN103516185A CN 103516185 A CN103516185 A CN 103516185A CN 201210215523 A CN201210215523 A CN 201210215523A CN 103516185 A CN103516185 A CN 103516185A
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Abstract
The invention discloses a BOOST converter and a differential mode prevention surge protection circuit thereof. The BOOST converter is connected to a direct current power supply and is used to carry out boost on a voltage input by the direct current power supply. The BOOST converter comprises an output filtering capacitor. The differential mode prevention surge protection circuit comprises a first portion and a second portion, wherein the first portion is used to bypass negative surge energy input by the direct current power supply; the second portion is used to guide positive surge energy input by the direct current power supply into the output filtering capacitor so that the output filtering capacitor absorbs the positive surge energy. By using the technical scheme of the invention, because the first portion of the differential mode prevention surge protection circuit can bypass the negative surge energy input by the direct current power supply and the second portion of the differential mode prevention surge protection circuit can guide the positive surge energy input by the direct current power supply into the output filtering capacitor so that the output filtering capacitor absorbs the positive surge energy, the differential mode prevention surge protection circuit can simply and effectively realize the protection of the differential mode prevention surge.
Description
Technical field
The present invention relates to power protection, relate in particular to a kind of BOOST converter and anti-difference mode surge protection circuit thereof.
Background technology
BOOST converter is widely used in various power supplys, as shown in Figure 1, BOOST converter is connected in DC power supply (battery) and boosts for the voltage that DC power supply is inputted, traditional BOOST topology is by inductance L, metal-oxide-semiconductor S, diode D, capacitor C and load resistance R are formed by connecting, wherein, one end of inductance L connects the anode of DC power supply, the other end of inductance L connects respectively the drain electrode of positive pole and the metal-oxide-semiconductor S of diode D, the negative pole of diode D connects the positive pole of capacitor C, the negative pole of capacitor C is connected the negative terminal of DC power supply with the source electrode of metal-oxide-semiconductor S, load capacitance R is in parallel with capacitor C.In a lot of application scenarios; BOOST converter need to have anti-difference mode surge protection function; for traditional BOOST converter conventionally between its two input the method such as piezo-resistance in parallel input difference mode surge protection; but in actual applications due to the intrinsic characteristic of piezo-resistance; surge voltage is still very high in the residual voltage on pressure-sensitive, and this scheme does not often have the effect of protection.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned piezo-resistance of prior art, can not effectively carry out the defect of anti-difference mode surge protection, and a kind of anti-difference mode surge protection circuit of simple, effective BOOST converter is provided.
The technical solution adopted for the present invention to solve the technical problems is: the anti-difference mode surge protection circuit of constructing a kind of BOOST converter; described BOOST converter is connected in DC power supply and boosts for the voltage that DC power supply is inputted; and described BOOST converter comprises output filter capacitor, described anti-difference mode surge protection circuit comprises:
For the first that the negative sense surge energy of DC power supply input is bypassed; And
For the forward surge energy of DC power supply input is imported to output filter capacitor so that described output filter capacitor sponges the second portion of this forward surge energy.
In anti-difference mode surge protection circuit of the present invention, described first is the first diode, and the negative pole of described the first diode connects the anode of described DC power supply, and the positive pole of described the first diode connects the negative terminal of described DC power supply.
In anti-difference mode surge protection circuit of the present invention; described first is at least two the first diodes that are in parallel; and the negative pole of described at least two the first diodes all connects the anode of described DC power supply, the positive pole of described at least two the first diodes all connects the negative terminal of described DC power supply.
In anti-difference mode surge protection circuit of the present invention; described first comprises the first diode and the first resistance; and the negative pole of described the first diode connects the anode of described DC power supply, the positive pole of described the first diode connects the negative terminal of described DC power supply by described the first resistance.
In anti-difference mode surge protection circuit of the present invention; described first comprises the first diode and the first inductance; and the negative pole of described the first diode connects the anode of described DC power supply, the positive pole of described the first diode connects the negative terminal of described DC power supply by described the first inductance.
In anti-difference mode surge protection circuit of the present invention; described first comprises the first diode and the first electric capacity; and the negative pole of described the first diode connects the anode of described DC power supply, the positive pole of described the first diode connects the negative terminal of described DC power supply by described the first electric capacity.
In anti-difference mode surge protection circuit of the present invention, described second portion is the second diode, and the positive pole of described the second diode connects the anode of described DC power supply, and the negative pole of described the second diode connects the positive pole of described output filter capacitor.
In anti-difference mode surge protection circuit of the present invention; described second portion is at least two the second diodes that are in parallel; and the positive pole of described at least two the second diodes connects the anode of described DC power supply, the negative pole of described at least two the second diodes connects the positive pole of described output filter capacitor.
In anti-difference mode surge protection circuit of the present invention; described second portion comprises the second diode and the second resistance; and the positive pole of described the second diode connects the anode of DC power supply, and the negative pole of described the second diode connects the positive pole of described output filter capacitor by described the second resistance.
In anti-difference mode surge protection circuit of the present invention; described second portion comprises the second diode and the second inductance; and the positive pole of described the second diode connects the anode of described DC power supply, the negative pole of described the second diode connects the positive pole of described output filter capacitor by described the second inductance.
The present invention also constructs a kind of BOOST converter, comprises above-described anti-difference mode surge protection circuit.
Implement technical scheme of the present invention, because the first of anti-difference mode surge protection circuit can bypass the negative sense surge energy of DC power supply input; The second portion of anti-difference mode surge protection circuit can import to output filter capacitor so that output filter capacitor sponges this forward surge energy by the forward surge energy of DC power supply input.Therefore, this anti-difference mode surge protection circuit can be realized the protection of anti-differential mode surge simply, effectively.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit diagram of traditional BOOST converter;
Fig. 2 is the logic diagram of the BOOST converter embodiment mono-of the anti-difference mode surge protection circuit of band of the present invention;
Fig. 3 is the circuit diagram of the BOOST converter embodiment bis-of the anti-difference mode surge protection circuit of band of the present invention;
Fig. 4 is the circuit diagram of the BOOST converter embodiment tri-of the anti-difference mode surge protection circuit of band of the present invention;
Fig. 5 is the circuit diagram of the BOOST converter embodiment tetra-of the anti-difference mode surge protection circuit of band of the present invention;
Fig. 6 is the circuit diagram of the BOOST converter embodiment five of the anti-difference mode surge protection circuit of band of the present invention;
Fig. 7 is the circuit diagram of the BOOST converter embodiment six of the anti-difference mode surge protection circuit of band of the present invention.
Embodiment
As shown in Figure 2, in BOOST converter embodiment mono-of the present invention, first explanation is, BOOST converter is connected in DC power supply (battery) and boosts for the voltage that DC power supply is inputted, this BOOST converter comprises energy storage inductor L, diode D, output filter capacitor C, metal-oxide-semiconductor S and load resistance R, and one end of energy storage inductor L connects the anode of DC power supply, the other end of energy storage inductor L connects the positive pole of diode D and the drain electrode of metal-oxide-semiconductor, the negative pole of diode D connects the positive pole of output filter capacitor C, the negative pole of output filter capacitor C is connected the negative terminal of DC power supply with the source electrode of metal-oxide-semiconductor S, load resistance R is connected in parallel on the two ends of output filter capacitor C.In addition, especially explanation is, also be that improvement of the present invention is: this BOOST converter also comprises anti-difference mode surge protection circuit 10, and this anti-difference mode surge protection circuit comprises first 11 and second portion 12, wherein, first 11 is for bypassing the negative sense surge energy of DC power supply input; Second portion 12 is for importing to output filter capacitor C so that output filter capacitor C sponges this forward surge energy by the forward surge energy of DC power supply input.Therefore, this anti-difference mode surge protection circuit can be realized the protection of anti-differential mode surge simply, effectively.
The circuit diagram of the BOOST converter embodiment bis-of the anti-difference mode surge protection circuit of band of the present invention as shown in Figure 3; the BOOST converter of this embodiment is compared embodiment mono-; first 11 is specially the first diode D1; second portion 12 is specially the second diode D2, and other circuit part is identical with embodiment mono-.Wherein, the negative pole of the first diode D1 connects the anode of DC power supply, and the positive pole of the first diode D1 connects the negative terminal of DC power supply, and the positive pole of the second diode D2 connects the anode of DC power supply, and the negative pole of the second diode D2 connects the positive pole of output filter capacitor C.The following describes the protection philosophy of this anti-difference mode surge protection circuit: when the negative sense surge of DC power supply input occurs, the first diode D1 bypasses this negative sense surge energy, thereby makes this negative sense surge can not burn out circuit below; When the forward surge of stream power supply input occurs; the second diode D2 imports to output filter capacitor C so that output filter capacitor C sponges this forward surge energy by this forward surge energy; thereby make this forward surge can not burn out circuit below; therefore, this anti-difference mode surge protection circuit can be realized the protection of anti-differential mode surge simply, effectively.
The circuit diagram of the BOOST converter embodiment tri-of the anti-difference mode surge protection circuit of band of the present invention as shown in Figure 4; first explanation is; the BOOST converter of this embodiment is compared embodiment mono-; first 11 is specially two the first diode D1, D1 ' that are in parallel; second portion 12 is specially two the second diode D2, D2 ' that are in parallel, and other circuit part is identical with embodiment mono-.Wherein, the positive pole of two the first diode D1, D1 ' all connects the negative terminal of DC power supply, and the negative pole of two the first diode D1, D1 ' all connects the anode of DC power supply; The positive pole of two the second diode D2, D2 ' all connects the anode of DC power supply, and the negative pole of two the second diode D2, D2 ' all connects the positive pole of output filter capacitor C.The following describes the protection philosophy of this anti-difference mode surge protection circuit: when the negative sense surge of DC power supply input occurs, two the first diode D1, D1 ' bypass this negative sense surge energy, thereby make this negative sense surge can not burn out circuit below; When the forward surge of stream power supply input occurs; two the second diode D2, D2 ' import to output filter capacitor C so that output filter capacitor C sponges this forward surge energy by this forward surge energy; thereby make this forward surge can not burn out circuit below; therefore, this anti-difference mode surge protection circuit can be realized the protection of anti-differential mode surge simply, effectively.
Also it should be noted that in the above embodiments, two the first diode D1, D1 ', two the second diode D2, D2 ' can be realized by rectifier bridge stack DR, also can be realized by building by separated diode.In addition, also it should be noted that, above-described embodiment only shows two the first diode D1, D1 ' that are in parallel and two the second diode D2, D2 ' that are in parallel, certainly, this is one of them embodiment of the present invention, the quantity of the quantity of the first diode being in parallel in other embodiments, and the second diode being in parallel can be other Arbitrary Digit.
The circuit diagram of the BOOST converter embodiment tetra-of the anti-difference mode surge protection circuit of band of the present invention as shown in Figure 5; first explanation is; the BOOST converter of this embodiment is compared the embodiment bis-shown in Fig. 3; difference Jin Shi first 11; different parts is below only described, identical part repeats no more.In this embodiment, first 11 comprises the first diode D1 and the first resistance R 1, and the anode of the negative pole of the first diode D1 connection DC power supply, and the positive pole of the first diode D1 connects the negative terminal of DC power supply by the first resistance R 1.Implement the technical scheme of this embodiment, compare embodiment bis-, because the first resistance R 1 can play current limliting, so the first diode D1 can select the junior diode of overcurrent, to reduce costs.
The circuit diagram of the BOOST converter embodiment five of the anti-difference mode surge protection circuit of band of the present invention as shown in Figure 6; first explanation is; the BOOST converter of this embodiment is compared the embodiment bis-shown in Fig. 3; difference Jin Shi first 11; different parts is below only described, identical part repeats no more.In this embodiment, first 11 comprises the first diode D1 and the first inductance L 1, and the anode of the negative pole of the first diode D1 connection DC power supply, and the positive pole of the first diode D1 connects the negative terminal of DC power supply by the first inductance L 1.Implement the technical scheme of this embodiment, compare embodiment bis-, the first inductance L 1 and can prevent that the surge current on the first diode D1 is too high, so the first diode D1 can select the junior diode of overcurrent.
The circuit diagram of the BOOST converter embodiment six of the anti-difference mode surge protection circuit of band of the present invention as shown in Figure 7; first explanation is; the BOOST converter of this embodiment is compared the embodiment bis-shown in Fig. 3; difference Jin Shi first 11; different parts is below only described, identical part repeats no more.In this embodiment, first 11 comprises the first diode D1 and the first capacitor C 1, and the anode of the negative pole of the first diode D1 connection DC power supply, and the positive pole of the first diode D1 connects the negative terminal of DC power supply by the first capacitor C 1.Implement the technical scheme of this embodiment, compare embodiment bis-, the first capacitor C 1 and can prevent that the surge voltage on the first diode D1 is too high, so the first diode D1 can select the junior diode of overcurrent.
In addition, in other embodiment of the BOOST converter of the anti-difference mode surge protection circuit of band of the present invention, second portion also can have following two kinds of distortion: one, second portion comprises the second diode D2 and the second resistance, and the positive pole of the second diode D2 connects the anode of DC power supply, the negative pole of the second diode connects the positive pole of output filter capacitor C by the second resistance; Two, second portion comprises the second diode D2 and the second inductance, and the anode of the positive pole of the second diode D2 connection DC power supply, and the negative pole of the second diode D2 connects the positive pole of output filter capacitor C by the second inductance.And the circuit structure of the second portion shown in the distortion of two kinds of these of second portion and Fig. 4 all can combine with the arbitrary embodiment Zhong first shown in Fig. 3 to Fig. 7, this is also in protection scope of the present invention.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (11)
1. the anti-difference mode surge protection circuit of a BOOST converter; described BOOST converter is connected in DC power supply and boosts for the voltage that DC power supply is inputted; and described BOOST converter comprises output filter capacitor, it is characterized in that, described anti-difference mode surge protection circuit comprises:
For the first that the negative sense surge energy of DC power supply input is bypassed; And
For the forward surge energy of DC power supply input is imported to output filter capacitor so that described output filter capacitor sponges the second portion of this forward surge energy.
2. anti-difference mode surge protection circuit according to claim 1; it is characterized in that; described first is the first diode, and the negative pole of described the first diode connects the anode of described DC power supply, and the positive pole of described the first diode connects the negative terminal of described DC power supply.
3. anti-difference mode surge protection circuit according to claim 1; it is characterized in that; described first is at least two the first diodes that are in parallel; and the negative pole of described at least two the first diodes all connects the anode of described DC power supply, the positive pole of described at least two the first diodes all connects the negative terminal of described DC power supply.
4. anti-difference mode surge protection circuit according to claim 1; it is characterized in that; described first comprises the first diode and the first resistance; and the negative pole of described the first diode connects the anode of described DC power supply, the positive pole of described the first diode connects the negative terminal of described DC power supply by described the first resistance.
5. anti-difference mode surge protection circuit according to claim 1; it is characterized in that; described first comprises the first diode and the first inductance; and the negative pole of described the first diode connects the anode of described DC power supply, the positive pole of described the first diode connects the negative terminal of described DC power supply by described the first inductance.
6. anti-difference mode surge protection circuit according to claim 1; it is characterized in that; described first comprises the first diode and the first electric capacity; and the negative pole of described the first diode connects the anode of described DC power supply, the positive pole of described the first diode connects the negative terminal of described DC power supply by described the first electric capacity.
7. according to the anti-difference mode surge protection circuit described in claim 1 to 6 any one; it is characterized in that; described second portion is the second diode, and the positive pole of described the second diode connects the anode of described DC power supply, and the negative pole of described the second diode connects the positive pole of described output filter capacitor.
8. according to the anti-difference mode surge protection circuit described in claim 1 to 6 any one; it is characterized in that; described second portion is at least two the second diodes that are in parallel; and the positive pole of described at least two the second diodes connects the anode of described DC power supply, the negative pole of described at least two the second diodes connects the positive pole of described output filter capacitor.
9. according to the anti-difference mode surge protection circuit described in claim 1 to 6 any one; it is characterized in that; described second portion comprises the second diode and the second resistance; and the positive pole of described the second diode connects the anode of DC power supply, and the negative pole of described the second diode connects the positive pole of described output filter capacitor by described the second resistance.
10. according to the anti-difference mode surge protection circuit described in claim 1 to 6 any one; it is characterized in that; described second portion comprises the second diode and the second inductance; and the positive pole of described the second diode connects the anode of described DC power supply, the negative pole of described the second diode connects the positive pole of described output filter capacitor by described the second inductance.
11. 1 kinds of BOOST converters, is characterized in that, comprise the anti-difference mode surge protection circuit described in claim 1-10.
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| CN201210215523.9A CN103516185B (en) | 2012-06-27 | 2012-06-27 | A kind of BOOST converter and anti-difference mode surge protection circuit thereof |
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| CN201210215523.9A CN103516185B (en) | 2012-06-27 | 2012-06-27 | A kind of BOOST converter and anti-difference mode surge protection circuit thereof |
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| CN104362842A (en) * | 2014-10-20 | 2015-02-18 | 矽力杰半导体技术(杭州)有限公司 | Switching power supply and surge protection circuit and method adaptive to same |
| CN104883044A (en) * | 2015-05-19 | 2015-09-02 | 华为技术有限公司 | Protection circuit in power conversion system and photovoltaic inversion system |
| CN104953808A (en) * | 2015-06-13 | 2015-09-30 | 来安县新元机电设备设计有限公司 | Surge voltage protection circuit of switching power supply, switching power supply and motor |
| CN105119494A (en) * | 2015-09-09 | 2015-12-02 | 广东康氏实业有限公司 | Laser generator high-voltage direct-current voltage-stabilized power source circuit of laser computer embroidery machine |
| CN108923411A (en) * | 2018-08-07 | 2018-11-30 | 中国航空工业集团公司雷华电子技术研究所 | A kind of circuit and its control method with voltage holding and reactance voltage surge |
| CN109546853A (en) * | 2019-01-03 | 2019-03-29 | 浙江鲲悟科技有限公司 | The active PFC circuit and frequency changing driving system of Anti-surging |
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| CN109546853A (en) * | 2019-01-03 | 2019-03-29 | 浙江鲲悟科技有限公司 | The active PFC circuit and frequency changing driving system of Anti-surging |
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| CN103516185B (en) | 2016-12-21 |
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Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 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. |