CN103178702A - Soft turn-off lossless snubber for power supply - Google Patents
Soft turn-off lossless snubber for power supply Download PDFInfo
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- CN103178702A CN103178702A CN2013100217292A CN201310021729A CN103178702A CN 103178702 A CN103178702 A CN 103178702A CN 2013100217292 A CN2013100217292 A CN 2013100217292A CN 201310021729 A CN201310021729 A CN 201310021729A CN 103178702 A CN103178702 A CN 103178702A
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- switching tube
- lossless snubber
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Abstract
The invention discloses a soft turn-off lossless snubber for a power supply. The soft turn-off lossless snubber comprises a main power supply, a transformer, a control module, a switch tube, a diode, a capacitor and an auxiliary power supply. One end of a primary winding of the transformer is connected with the main power supply. The other end of the primary winding of the transformer is respectively connected with a drain of the switch tube and an anode of the diode. A control electrode of the switch tube is connected with the control module. A source of the switch tube is grounded. A cathode of the diode is respectively connected with one end of the capacitor and the auxiliary power supply. The other end of the capacitor is grounded. A secondary winding of the transformer is connected with a subsequent circuit. The soft turn-off lossless snubber is capable of snubbing peak energy of the switch tube losslessly and allowing the switch tube to operate in a soft turn-off mode, conversion efficiency of the main power supply can be increased, temperature rise is lowered, and reliability of the main power supply is also increased.
Description
Technical field
The present invention relates to field of power electronics, relate in particular to a kind of soft shutoff Lossless Snubber device of power supply.
Background technology
Energy-saving and cost-reducing at present is the cry in epoch, power electronics equipment is being born the important task of electric energy conversion, and the height of its conversion efficiency directly has influence on the energy consumption of system, especially to using traditional switch power supply and new forms of energy power supply very widely, the meaning of conversion efficiency that improves these power supplys is very great.The accessory power supply of this type of power supply was all to receive the input energy that consumes power supply in vain in the past; (RDC refers to: the peak absorbing circuit that is comprised of resistance, diode and electric capacity) resistance of circuit consumes the spike energy of switching tube, not only wastes energy and also causes very large caloric value, and complete machine temperature is raise by RDC; The more important thing is, switching tube is operated in the hard switching state, and switching loss is large, and reliability is low.
Summary of the invention
For the weak point that exists in above-mentioned technology, the invention provides a kind of soft shutoff Lossless Snubber device of power supply, this device is transferred to accessory power supply with the spike energy of switching tube; Simultaneously, make switching tube be operated in soft off state, namely promoted conversion efficiency and the reliability of main power source.
For achieving the above object, the invention provides a kind of soft shutoff Lossless Snubber device of power supply, comprise main power source, transformer, control module, switching tube, diode, electric capacity and accessory power supply; Armature winding one end of described transformer connects main power source, the drain electrode of the other end difference connecting valve pipe of the armature winding of described transformer and the positive pole of diode, the control utmost point link control module of described switching tube, the source ground of described switching tube, the negative pole of described diode connects respectively an end and the accessory power supply of electric capacity, the other end ground connection of described electric capacity, the secondary winding of described transformer connects subsequent conditioning circuit.
Wherein, described accessory power supply is for being used for the DC to DC converter to circuit supply.
Wherein, described switching tube is triode or field effect transistor.
Wherein, described transformer is normal shock transformer or flyback transformer.
for achieving the above object, the invention provides the soft shutoff Lossless Snubber device of another kind of power supply, comprise main power source, transformer, control module, the first switching tube, second switch pipe, the first diode, the second diode, electric capacity and accessory power supply, the intermediate terminal of the armature winding of described transformer connects main power source, the armature winding Same Name of Ends of described transformer connects respectively the drain electrode of the first switching tube and the positive pole of the second diode, the control of described the first switching tube and second switch pipe is link control module extremely all, the source grounding of described the first switching tube and second switch pipe, the armature winding non-same polarity of described transformer connects respectively the drain electrode of second switch pipe and the positive pole of the first diode, the negative pole of the first diode connects respectively an end and the accessory power supply of electric capacity, the negative pole of described the second diode passes through capacity earth, the secondary winding of described transformer connects subsequent conditioning circuit.
Wherein, described accessory power supply is for being used for the DC to DC converter to circuit supply.
Wherein, described the first switching tube and second switch pipe are triode or field effect transistor.
Wherein, described transformer is normal shock transformer or flyback transformer.
the invention has the beneficial effects as follows: compared with prior art, the soft shutoff Lossless Snubber device of power supply provided by the invention, when control module control switch pipe turn-offs, because the electric current of transformer can not suddenly change, can be at switching tube, the positive pole of diode, this three's connecting place of one end of transformer forms very high peak voltage, this voltage through the negative pole of the positive pole of diode and diode to capacitor charging, because capacitance voltage can not suddenly change, can think that electric capacity is instantaneous short circuit, form very large charging current, so just clamped down on the peak voltage of switching tube, the peak voltage amplitude is reduced, and the rate of rise slows down, reached the purpose of the soft shutoff of switching tube, accessory power supply is received capacitance terminal, and the energy that holds for the power down of releasing exactly is for switching tube turn-offs the establishment charge condition next time, simultaneously, electric capacity also provides necessary energy for accessory power supply, and this structure can improve the conversion efficiency of main power source, reduces temperature rise, also improved the reliability of main power source.The characteristics such as the high and job stability of conversion efficiency simple in structure, main power source that the present invention has is strong.
Description of drawings
Fig. 1 is the structural representation of the first embodiment;
Fig. 2 is the structural representation of the second embodiment.
The main element symbol description is as follows:
AVcc, main power source A1, transformer
A2, control module A3, switching tube
A4, diode A5, electric capacity
A6, accessory power supply
BVcc main power source B1, transformer
B2, control module B3, the first switching tube
B4, the first diode B5, electric capacity
B6, accessory power supply B7, second switch pipe
The intermediate terminal of the armature winding of B8, the second diode P, transformer
Embodiment
In order more clearly to explain the present invention, below in conjunction with accompanying drawing, the present invention is done to describe further.
See also Fig. 1, the soft shutoff Lossless Snubber device of the power supply that first embodiment of the invention provides comprises main power source AVcc, transformer A1, control module A2, switching tube A3, diode A4, electric capacity A5 and accessory power supply A6; Armature winding one end of transformer A1 connects main power source AVcc, the drain D of the other end difference connecting valve pipe A3 of the armature winding of transformer A1 and the positive pole of diode A4, the control utmost point G link control module A2 of switching tube A3, the source S ground connection of switching tube A3, the negative pole of diode A4 connects respectively an end and the accessory power supply A6 of electric capacity A5, the other end ground connection of electric capacity A5, the secondary winding of transformer A1 connects the subsequent conditioning circuit (not shown).
in this case, armature winding one end of transformer A1 connects main power source AVcc, the energy of main power source AVcc is transferred to rear class by transformer A1 and switching tube A3, the other end connecting valve pipe A3 of the armature winding of transformer A1, connect simultaneously the positive pole of diode A4, consist of the loop by switching tube A3, and absorb the spike energy of switching tube A3 through the positive pole of diode A4, and energy is passed to accessory power supply A6, the control utmost point G of switching tube A3 meets control module A2, the signal of control module A2 is transferred to the control utmost point G of switching tube A3, control switch pipe A3 is by the mode switch work of appointment, the source S ground connection of switching tube A3 makes transformer A1 form over the ground the loop, the negative pole of diode A4 connects the end of electric capacity A5, receives simultaneously accessory power supply A6, and when switching tube A3 turn-offs, very high peak current is flowed through diode A4 to electric capacity A5 charging, and diode A4 provides path for charging current, after electric capacity A5 charging, through accessory power supply A6 discharge, reach the effect that switching tube A3 turn-offs spike energy that absorbs, the other end ground connection of electric capacity A5 provides path for electric capacity A5 discharges and recharges.
In this embodiment, accessory power supply A6 is for being used for the DC to DC converter to circuit supply.
In this embodiment, switching tube A3 is triode or field effect transistor.Certainly; this case is not limited to the execution mode that switching tube A3 is triode or field effect transistor; switching tube A3 can also be other execution modes such as thyristor; if to the change of switching tube A3 kind; so also can be understood as simple deformation or conversion to case, fall into protection scope of the present invention.
In this embodiment, transformer A1 is normal shock transformer or flyback transformer.Certainly; this case is not limited to the execution mode that transformer A1 is normal shock transformer or flyback transformer; transformer A1 can also be other execution modes such as push-pull transformer; if to the change of transformer A1 kind; so also can be understood as simple deformation or conversion to case, fall into protection scope of the present invention.
please further consult Fig. 2, the soft shutoff Lossless Snubber device of the power supply that second embodiment of the invention provides comprises main power source BVcc, transformer B1, control module B2, the first switching tube B3, second switch pipe B7, the first diode B4, the second diode B8, electric capacity B5 and accessory power supply B6, the intermediate terminal P of the armature winding of transformer B1 connects main power source BVcc, the armature winding Same Name of Ends of transformer B1 connects respectively the drain D of the first switching tube B3 and the positive pole of the second diode B8, the equal link control module B2 of control utmost point D of the control utmost point D of the first switching tube B3 and second switch pipe B7, the equal ground connection of source S of the source S of the first switching tube B3 and second switch pipe B7, the armature winding non-same polarity of transformer B1 connects respectively the drain D of second switch pipe B7 and the positive pole of the first diode B4, the negative pole of the first diode B4 connects respectively an end and the accessory power supply B6 of electric capacity B5, the negative pole of the second diode B8 is by electric capacity B5 ground connection, the secondary winding of transformer B1 connects the subsequent conditioning circuit (not shown).
in this case, the intermediate terminal P of the armature winding of transformer B1 connects main power source BVcc, the energy of main power source BVcc is passed through transformer B1, the first switching tube B3 and second switch pipe B7 are transferred to rear class, the armature winding Same Name of Ends of transformer B1 connects the first switching tube B3, connect simultaneously the positive pole of the second diode B8, the armature winding non-same polarity of transformer B1 connects respectively the drain D of second switch pipe B7 and the positive pole of the first diode B4, consist of the loop by the first switching tube B3 and second switch pipe B7, and absorb the spike energy of second switch pipe B7 through the positive pole of the first diode B4, absorb the spike energy of the first switching tube B3 through the positive pole of the second diode B8, and energy is passed to accessory power supply B6, the control utmost point G of the control utmost point G of the first switching tube B3 and second switch pipe B7 all meets control module B2, the signal of control module B2 is transferred to the control utmost point G of the first switching tube B3 and the control utmost point G of second switch pipe B7, control the first switching tube B3 and second switch pipe B7 by the mode switch work of appointment, the equal ground connection of source S of the source S of the first switching tube B3 and second switch pipe B7 makes transformer B1 form over the ground the loop, the negative pole of the first diode B4 connects the end of electric capacity B5, receive simultaneously accessory power supply B6, when the first switching tube B3 and second switch pipe B7 turn-off, very high peak current is flowed through the first diode B4 and the second diode B8 to electric capacity B5 charging, and the first diode B4 and the second diode B8 provide path for charging current simultaneously, after electric capacity B5 charging, through accessory power supply B6 discharge, reach the effect that absorbs the first switching tube B3 and second switch pipe B7 shutoff spike energy, the other end ground connection of electric capacity B5 provides path for electric capacity B5 discharges and recharges.
In this embodiment, accessory power supply B6 is for being used for the DC to DC converter to circuit supply.
In this embodiment, the first switching tube B3 and second switch pipe B7 are triode or field effect transistor.Certainly; this case is not limited to the execution mode that switching tube is triode or field effect transistor, and switching tube can also be other execution modes such as thyristor, if to the change of switching tube kind; so also can be understood as simple deformation or conversion to case, fall into protection scope of the present invention.
In this embodiment, transformer B1 is normal shock transformer or flyback transformer.Certainly; this case is not limited to the execution mode that transformer B1 is normal shock transformer or flyback transformer; transformer B1 can also be other execution modes such as push-pull transformer; if to the change of transformer B1 kind; so also can be understood as simple deformation or conversion to case, fall into protection scope of the present invention.
Main power source in above-mentioned two embodiment mainly refers to traditional switch power supply and new forms of energy power supply.
situation compared to prior art, the soft shutoff Lossless Snubber device of the power supply that above-mentioned two embodiment provide, when control module control switch pipe turn-offs, because the electric current of transformer can not suddenly change, can be at switching tube, the positive pole of diode, this three's connecting place of one end of transformer forms very high peak voltage, this voltage through the negative pole of the positive pole of diode and diode to capacitor charging, because capacitance voltage can not suddenly change, can think that electric capacity is instantaneous short circuit, form very large charging current, so just clamped down on the peak voltage of switching tube, the peak voltage amplitude is reduced, and the rate of rise slows down, reached the purpose of the soft shutoff of switching tube, accessory power supply is received capacitance terminal, and the energy that holds for the power down of releasing exactly is for switching tube turn-offs the establishment charge condition next time, simultaneously, electric capacity also provides necessary energy for accessory power supply, and this structure has promoted conversion efficiency and the reliability of main power source.The characteristics such as the high and job stability of conversion efficiency simple in structure, main power source that the present invention has is strong.
Above disclosed be only several specific embodiment of the present invention, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. the soft shutoff Lossless Snubber device of a power supply, is characterized in that, comprises main power source, transformer, control module, switching tube, diode, electric capacity and accessory power supply; Armature winding one end of described transformer connects main power source, the drain electrode of the other end difference connecting valve pipe of the armature winding of described transformer and the positive pole of diode, the control utmost point link control module of described switching tube, the source ground of described switching tube, the negative pole of described diode connects respectively an end and the accessory power supply of electric capacity, the other end ground connection of described electric capacity, the secondary winding of described transformer connects subsequent conditioning circuit.
2. the soft shutoff Lossless Snubber device of power supply according to claim 1, is characterized in that, described accessory power supply is for being used for the DC to DC converter to circuit supply.
3. the soft shutoff Lossless Snubber device of power supply according to claim 1, is characterized in that, described switching tube is triode or field effect transistor.
4. the soft shutoff Lossless Snubber device of power supply according to claim 1, is characterized in that, described transformer is normal shock transformer or flyback transformer.
5. the soft shutoff Lossless Snubber device of a power supply, is characterized in that, comprises main power source, transformer, control module, the first switching tube, second switch pipe, the first diode, the second diode, electric capacity and accessory power supply, the intermediate terminal of the armature winding of described transformer connects main power source, the armature winding Same Name of Ends of described transformer connects respectively the drain electrode of the first switching tube and the positive pole of the second diode, the control of described the first switching tube and second switch pipe is link control module extremely all, the source grounding of described the first switching tube and second switch pipe, the armature winding non-same polarity of described transformer connects respectively the drain electrode of second switch pipe and the positive pole of the first diode, the negative pole of the first diode connects respectively an end and the accessory power supply of electric capacity, the negative pole of described the second diode passes through capacity earth, the secondary winding of described transformer connects subsequent conditioning circuit.
6. the soft shutoff Lossless Snubber device of power supply according to claim 5, is characterized in that, described accessory power supply is for being used for the DC to DC converter to circuit supply.
7. the soft shutoff Lossless Snubber device of power supply according to claim 5, is characterized in that, described the first switching tube and second switch pipe are triode or field effect transistor.
8. the soft shutoff Lossless Snubber device of power supply according to claim 5, is characterized in that, described transformer is normal shock transformer or flyback transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100217292A CN103178702A (en) | 2013-01-18 | 2013-01-18 | Soft turn-off lossless snubber for power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100217292A CN103178702A (en) | 2013-01-18 | 2013-01-18 | Soft turn-off lossless snubber for power supply |
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| CN103178702A true CN103178702A (en) | 2013-06-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015131364A1 (en) * | 2014-03-06 | 2015-09-11 | 深圳市欣锐特科技有限公司 | Voltage spike processing circuit for use in switched-mode power supply |
| CN106301032A (en) * | 2016-08-25 | 2017-01-04 | 深圳市华星光电技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN107947555A (en) * | 2017-12-04 | 2018-04-20 | 陕西航空电气有限责任公司 | A kind of low-loss type absorbing circuit suitable for push-pull converter |
| WO2021022809A1 (en) * | 2019-08-06 | 2021-02-11 | 科华恒盛股份有限公司 | Soft-switching circuit and power electronic device |
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| US6043636A (en) * | 1997-10-20 | 2000-03-28 | Diversified Technologies, Inc. | Voltage transient suppression |
| CN1354553A (en) * | 2001-11-27 | 2002-06-19 | 范家闩 | Zero-voltage switch insoalting transformer with fixed transmission ratio |
| CN101651419A (en) * | 2009-08-25 | 2010-02-17 | 陆东海 | Switch power supply circuit |
| CN201674266U (en) * | 2009-12-30 | 2010-12-15 | 旭隼科技股份有限公司 | Resonant power converter and uninterruptible power system utilizing same |
| CN203056955U (en) * | 2013-01-18 | 2013-07-10 | 深圳市安托山技术有限公司 | Soft turn-off lossless absorbing device of power source |
-
2013
- 2013-01-18 CN CN2013100217292A patent/CN103178702A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043636A (en) * | 1997-10-20 | 2000-03-28 | Diversified Technologies, Inc. | Voltage transient suppression |
| CN1354553A (en) * | 2001-11-27 | 2002-06-19 | 范家闩 | Zero-voltage switch insoalting transformer with fixed transmission ratio |
| CN101651419A (en) * | 2009-08-25 | 2010-02-17 | 陆东海 | Switch power supply circuit |
| CN201674266U (en) * | 2009-12-30 | 2010-12-15 | 旭隼科技股份有限公司 | Resonant power converter and uninterruptible power system utilizing same |
| CN203056955U (en) * | 2013-01-18 | 2013-07-10 | 深圳市安托山技术有限公司 | Soft turn-off lossless absorbing device of power source |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015131364A1 (en) * | 2014-03-06 | 2015-09-11 | 深圳市欣锐特科技有限公司 | Voltage spike processing circuit for use in switched-mode power supply |
| CN106301032A (en) * | 2016-08-25 | 2017-01-04 | 深圳市华星光电技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN107947555A (en) * | 2017-12-04 | 2018-04-20 | 陕西航空电气有限责任公司 | A kind of low-loss type absorbing circuit suitable for push-pull converter |
| WO2021022809A1 (en) * | 2019-08-06 | 2021-02-11 | 科华恒盛股份有限公司 | Soft-switching circuit and power electronic device |
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Application publication date: 20130626 |