CN103138575B - With the clamp formula Boost of snubber circuit - Google Patents
With the clamp formula Boost of snubber circuit Download PDFInfo
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- CN103138575B CN103138575B CN201310099856.4A CN201310099856A CN103138575B CN 103138575 B CN103138575 B CN 103138575B CN 201310099856 A CN201310099856 A CN 201310099856A CN 103138575 B CN103138575 B CN 103138575B
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Abstract
With the clamp formula Boost of snubber circuit, positive source and electric capacity III positive pole are connected to form power output end by diode II, power output end is connected by Boost energy storage inductor with switching tube collector electrode, and the negative pole of the emitter of switching tube and power supply and electric capacity III links together; Energy storage inductor and switching tube collector electrode are connected to the positive pole of electric capacity II by diode respectively; The negative electrode of diode, diode III and the positive pole of electric capacity II link together, form the output of boost chopper, the negative electrode of diode, diode III and the positive pole of electric capacity II are connected in electric capacity and load by filter inductance I respectively, form output filtering and loading section; Snubber circuit is made up of diode I, resistance and electric capacity I, and diode I anode, electric capacity I one end be connecting valve collector and emitter respectively, and resistance connects diode cathode, and diode I negative electrode and resistance and electric capacity I other end connect.
Description
Technical field
The present invention relates to a kind of clamp formula Boost with snubber circuit, belong to electric and electronic power converter technique field.
Background technology
Requiring in the equipment that output voltage is higher than input voltage, in order to obtain higher output voltage, often adopt the converter with boosting characteristic, what the most often adopt is Boost circuit, is made up of, as shown in Figure 1 input DC power, booster converter and output filtering and load, this circuit is by duty-cycle limit, boost capability is limited, can obtain comparatively high output voltage by multistage Boost circuit, but can increase the complexity of cost and system; Another deficiency be whole power by converter, especially in high-power occasion, switch tube voltage, current stress and inductive capacity and loss are all comparatively large, bring larger difficulty to practical implementation.Traditional B oost converter snubber circuit is connected to switching tube two ends (IGBT collector and emitter) respectively, electric capacity forms discharge loop, as shown in Figure 2, when resistance is less by resistance and switching tube, electric discharge moment is faded to by charging, current changing rate is comparatively large, easily forms larger due to voltage spikes, jeopardizes switching tube safety, when resistance is larger, discharge time is oversize, affects assimilation effect, and snubber circuit still comes with some shortcomings.
Summary of the invention
The object of the present invention is to provide a kind of clamp formula Boost with snubber circuit, with solve prior art exist switch tube voltage stress large, due to voltage spikes is high and energy storage inductor loss is large and discharge time is oversize, affects the problem of assimilation effect.
Another object of the present invention is to provide a kind of snubber circuit.
The object of the present invention is achieved like this, and a kind of clamp formula Boost with snubber circuit, is characterized in that, comprise power unit, boost chopper, snubber circuit and rear class filtering and load; Positive source and electric capacity III positive pole are connected to form power output end by diode II, and power output end is connected by energy storage inductor with switching tube collector electrode, and the negative pole of the emitter of switching tube and the negative pole of power supply and electric capacity III links together; Energy storage inductor and switching tube collector electrode are connected to the positive pole of electric capacity II by diode respectively; The positive pole of the negative electrode of diode, the negative electrode of diode III and electric capacity II links together, form the output of boost chopper, the negative electrode of the negative electrode of diode, diode III and the positive pole of electric capacity II are connected in electric capacity and load by filter inductance I respectively, form output filtering and loading section; Snubber circuit is made up of diode I, resistance and electric capacity I; Diode I anode connecting valve collector electrode, electric capacity I one end connecting valve emitter, resistance is connected to diode cathode, and diode I negative electrode and resistance and electric capacity I other end connect; Tie point after electric capacity II is in parallel with diode III is connected to the power supply outlet side after the diode II of power sources in series, and output voltage clamp is to input voltage, and output voltage superposes sum for input voltage and chopper lifting voltage; Suppose that switch conduction times is T
on, energy storage inductor, electric capacity II and diode, the voltage stress of diode III is: U
l=U
c2=U
d=U
d3=ET
on, the voltage stress of energy storage inductor, electric capacity II and diode, diode III is only voltage lifting part, and wherein, E is supply voltage.
The present invention has following beneficial effect:
1, Boost output connection is connected to input side by the present invention, voltage higher than importation only need be carried out lifting by chopper, output voltage superposes sum for input voltage and lifting voltage, system just can obtain higher output voltage with less duty ratio, has higher voltage transmission ratio.The power sum that power output produces for input voltage and lifting voltage, only some, by boost chopper, reduces diode and inductive drop, current stress and inductive capacity and capacitance voltage stress in chopper to power output.
2, electric capacity I C1, the resistance R in capacitor discharge loop in snubber circuit of the present invention
1by former switch pipe end reconfiguration to outlet side, weaken by former form discharge loop by switching tube time the discharging current instantaneous mutation overvoltage spike that produces, improve security of system and reliability.
Accompanying drawing explanation
Fig. 1 is traditional B OOST converter circuit figure;
Fig. 2 is conventional buffer absorbing circuit electric discharge operating state;
Fig. 3 is the clamp formula Boost circuit diagram of band snubber circuit of the present invention;
Fig. 4 is the clamp formula Boost structured flowchart of band snubber circuit of the present invention;
Fig. 5 is the clamp formula Boost operating state one of band snubber circuit of the present invention;
Fig. 6 is the clamp formula Boost operating state two of band snubber circuit of the present invention;
Fig. 7 is snubber circuit of the present invention charging working state schematic representation;
Fig. 8 is snubber circuit of the present invention electric discharge working state schematic representation.
In figure, 1. power unit, 2. boost chopper, 3. snubber circuit, 4. rear class filtering and load, E. input direct voltage, L. energy storage inductor, S. electronic power switch, D. diode, D1. diode I, D
2. diode II, D3. diode III, L1. filter inductance I, C. electric capacity, the load of C1. electric capacity I, C2. electric capacity II, C3. electric capacity III, R., R
1. resistance.
Embodiment
The clamp formula Boost of band snubber circuit of the present invention, comprises power unit 1, boost chopper 2, snubber circuit 3 and rear class filtering and load 4; As shown in Figure 3, power output end is connected with switching tube S collector electrode by Boost energy storage inductor L, power supply E positive pole and electric capacity III C3 positive pole are connected to form power output end by diode II D2, and the negative pole of the emitter of switching tube S and the negative pole of power supply E and electric capacity III C3 links together; Energy storage inductor L and switching tube S collector electrode are connected to the positive pole of electric capacity II C2 by diode D respectively; The positive pole of the negative electrode of diode D, the negative electrode of diode III D3 and electric capacity II C2 links together, and the negative electrode of the negative electrode of diode D, diode III D3 and electric capacity II C2 positive pole are connected on electric capacity C and load R by filter inductance I L1 respectively; Diode I D1, resistance R
1and electric capacity I C1 forms snubber circuit; Diode I D1 anode connecting valve S collector electrode, electric capacity I C1 one end connecting valve S emitter, resistance R
1be connected to diode D negative electrode, diode I D1 negative electrode and R
1connect with the electric capacity I C1 other end.Tie point after Boost output capacitance II C2 is in parallel with diode III D3 receives power supply E outlet side, and output voltage superposes sum for input voltage and chopper lifting voltage.Resistance R in snubber circuit
1one end and outlet side filter inductance I L1 connect together formation discharge loop.
The same with traditional B oost converter, the clamp formula Boost of band snubber circuit of the present invention has two kinds of operating states: the first operating state is inductive energy storage state, as shown in Figure 5; The second operating state is inductive discharge state, as shown in Figure 6.
Switch S conducting under inductive energy storage state, power supply E discharges to electric capacity III C3 and energy storage inductor L, energy storage inductor L energy storage, and now electric capacity III C3 voltage equals supply voltage, has:
E＝U
c3(1)
Under inductive discharge state, energy storage inductor L discharges to electric capacity II C2, electric capacity II C2 voltage equals energy storage inductor L voltage, and electric capacity III C3 powers to load end together with electric capacity II C2, because filter inductance L1 is used for filtering, inductance value is less, ignore its pressure drop, output voltage equals electric capacity III C3 voltage and superposes sum with electric capacity II C2 voltage, and electric capacity III C3 voltage equals supply voltage, so output voltage equals supply voltage superpose sum with electric capacity II C2 voltage, that is:
U
O＝U
c2+U
c3＝U
c2+E(2)
So chopper only need carry out lifting by output voltage higher than the part of supply voltage, only some passes through chopper to power output.
Suppose that switch conduction times is T
on, energy storage inductor L, electric capacity II C2 and diode D, the voltage stress of diode III D3 is:
U
L＝U
C2＝U
D＝U
D3＝ET
on(3)
Known by upper formula, the voltage stress of energy storage inductor L, electric capacity II C2 and diode D, diode III D3 is only voltage lifting part, the whole output voltage of non-traditional Boost, thus in the clamp formula Boost of band snubber circuit, inductance, electric capacity and diode have less voltage stress.
Snubber circuit also has two operating states:
One is Absorption Capacitance charged state, diode I D1 conducting, and electric capacity I C1 also plays the effect that clamp absorbs switching voltage spike to switch S two ends, as shown in Figure 7.
It two is Absorption Capacitance discharge condition, and in conventional suction circuit, electric capacity I C1 is by the resistance R of series connection
1form discharge loop with switch S, the maximum shortcoming of this discharge loop is just the increase in the current stress of switch, and produces high voltage spike by charging and discharging currents instantaneous mutation at open pipe two ends, jeopardizes switching tube safety.The invention reside in and Absorption Capacitance discharge loop is improved, as shown in Figure 8, discharge loop is changed to outlet side, by electric capacity I C1 series resistance R
1, filter inductance I L1 and load R and electric capacity C forms.This discharge loop limits loop current peak value, alleviates the voltage point honeybee that charging and discharging currents instantaneous mutation produces, thus solves the problems referred to above, improve switching tube safety and reliability.
Boost output connection is connected to input side by the present invention, voltage higher than importation only need be carried out lifting by chopper, output voltage superposes sum for input voltage and lifting voltage, system just can obtain higher output voltage with less duty ratio, has higher voltage transmission ratio.Only some, by boost chopper, reduces diode and inductive drop, current stress and inductive capacity and capacitance voltage stress in chopper to power output.In snubber circuit capacitor discharge loop by former switch pipe end reconfiguration to outlet side, weaken by former form discharge loop by switching tube time the discharging current instantaneous mutation overvoltage spike that produces, improve security of system and reliability.
Claims (1)
1. the clamp formula Boost with snubber circuit, is characterized in that, comprises power unit (1), boost chopper (2), snubber circuit (3) and rear class filtering and load (4); Power supply (E) positive pole and electric capacity III (C3) positive pole are connected to form power output end by diode II (D2), power output end is connected by energy storage inductor (L) with switching tube (S) collector electrode, and the negative pole of the emitter of switching tube (S) and the negative pole of power supply (E) and electric capacity III (C3) links together; Energy storage inductor (L) and switching tube (S) collector electrode are connected to the positive pole of electric capacity II (C2) by diode (D) respectively; The positive pole of the negative electrode of diode (D), the negative electrode of diode III (D3) and electric capacity II (C2) links together, form the output of boost chopper (2), the negative electrode of the negative electrode of diode (D), diode III (D3) and the positive pole of electric capacity II (C2) are connected to electric capacity (C) with in load (R) by filter inductance I (L1) respectively, form output filtering and loading section; Snubber circuit is by diode I (D1), resistance (R
1) and electric capacity I (C1) formation; Diode I (D1) anode connecting valve (S) collector electrode, electric capacity I (C1) one end connecting valve (S) emitter, resistance (R
1) be connected to diode (D) negative electrode, diode I (D1) negative electrode and resistance (R
1) and electric capacity I (C1) other end connect; Described electric capacity II (C2) and the tie point after diode III (D3) parallel connection are connected to the diode II (D that power supply (E) is connected
2) after power supply outlet side, output voltage clamp is to input voltage, and output voltage superposes sum for input voltage and chopper lifting voltage; Suppose that switch conduction times is T
on, energy storage inductor (L), electric capacity II (C2) and diode (D), the voltage stress of diode III (D3) is: U
l=U
c2=U
d=U
d3=ET
on, the voltage stress of energy storage inductor (L), electric capacity II (C2) and diode (D), diode III (D3) is only voltage lifting part, and wherein, E is supply voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099856.4A CN103138575B (en) | 2013-03-26 | 2013-03-26 | With the clamp formula Boost of snubber circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099856.4A CN103138575B (en) | 2013-03-26 | 2013-03-26 | With the clamp formula Boost of snubber circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103138575A CN103138575A (en) | 2013-06-05 |
| CN103138575B true CN103138575B (en) | 2016-02-24 |
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|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6206506B2 (en) * | 2013-12-27 | 2017-10-04 | 株式会社村田製作所 | Power circuit |
| CN104038044A (en) * | 2014-05-20 | 2014-09-10 | 广东美的暖通设备有限公司 | IGBT buffer circuit, PFC circuit and air conditioner control system |
| CN106771939A (en) * | 2017-01-22 | 2017-05-31 | 西安交通大学 | A kind of high voltage direct current cable partial discharge test circuit and method |
| CN108418409A (en) * | 2018-03-19 | 2018-08-17 | 青岛大学 | Cache peak voltage switching tube and the Switching Power Supply topology with the switching tube |
| CN108336902A (en) * | 2018-03-19 | 2018-07-27 | 青岛大学 | Boost circuit based on caching peak voltage switching tube |
| CN108649797B (en) * | 2018-06-15 | 2023-05-26 | 广东机电职业技术学院 | DC-DC power supply structure based on Boost positive and negative output |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783588A (en) * | 2009-12-31 | 2010-07-21 | 杭州浙大太阳电气有限公司 | Passive and nondestructive clamping single-phase high-gain converter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004254401A (en) * | 2003-02-19 | 2004-09-09 | Toshiba Corp | Boosting chopper device |
| JP5216819B2 (en) * | 2010-07-21 | 2013-06-19 | シャープ株式会社 | Power supply |
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2013
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783588A (en) * | 2009-12-31 | 2010-07-21 | 杭州浙大太阳电气有限公司 | Passive and nondestructive clamping single-phase high-gain converter |
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| CN103138575A (en) | 2013-06-05 |
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Granted publication date: 20160224 |