CN203554299U - High-voltage input flyback switching power supply - Google Patents
High-voltage input flyback switching power supply Download PDFInfo
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- CN203554299U CN203554299U CN201320751823.9U CN201320751823U CN203554299U CN 203554299 U CN203554299 U CN 203554299U CN 201320751823 U CN201320751823 U CN 201320751823U CN 203554299 U CN203554299 U CN 203554299U
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- 238000004804 winding Methods 0.000 claims abstract description 40
- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 239000004065 semiconductor Substances 0.000 claims description 19
- 230000035882 stress Effects 0.000 description 16
- 238000002955 isolation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010042209 Stress Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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Abstract
The utility model belongs to the field of switching power supplies, and discloses a high-voltage input flyback switching power supply. The high-voltage input flyback switching power supply includes a PWM control driving module, a high-frequency transformer and n series-connected switching modules; the primary winding of the high-frequency transformer includes n segments which are respectively marked as a first primary winding NP1, a second primary winding NP2..., an n-th primary winding NPn, wherein n is a positive integer greater than or equal to 2; each switching module comprises a first switching tube, a first resistor and a first capacitor; one end of each segment of the primary winding is connected with one end of the first switching tube; the other end of each segment of the primary winding is connected with the other end of the first switching tube through the first resistor; a control end of the first switching tube is connected with the PWM control driving module; and the first capacitor is connected in parallel with the first resistor. According to the high-voltage input flyback switching power supply of the utility model, a plurality of switching tubes are provided; the primary winding of the high-frequency transformer are divided into a plurality of segments; and stress borne by the switching tubes is 1/n of original stress. The high-voltage input flyback switching power supply can be connected with very high input voltage.
Description
Technical field
The utility model belongs to field of switch power, more specifically, relates to a kind of high input voltage reverse exciting switching voltage regulator.
Background technology
At present, on market, high input voltage reverse exciting switching voltage regulator generally adopts single tube form, generally uses a metal-oxide-semiconductor as switching tube, and it bears voltage stress is the voltage that input voltage adds secondary " flyback " returns, i.e. (V
dc+ n*V
out), V wherein
dcfor DC input voitage, n is transformer turn ratio, V
outfor output low pressure (not considering other pressure drops such as diode current flow herein), when input voltage is for very high time, switching tube will bear higher voltage.As shown below is typical frequency converter reverse exciting switching voltage regulator, and wherein Q1 is switching tube, and T is transformer.
For example, the bus direct voltage of 380VAC frequency converter is up to 800VDC, and now the switching tube using this busbar voltage as the common reverse exciting switching voltage regulator of input will bear (800+n*V
out) voltage stress, suppose this flyback voltage (n*V
out) there is 400V, switching tube bears the voltage stress of 1200V.And the metal-oxide-semiconductor that conventionally can buy on market is the highest withstand voltage for 1500V, just enough stay 20% trouble free service allowance.
When frequency converter is 690VAC input, its bus direct voltage is up to 1200VDC, and now the switching tube using this busbar voltage as the common reverse exciting switching voltage regulator of input will bear (1200+n*V
out) voltage stress, suppose this flyback voltage (n*V
out) there is 600V, switching tube bears the voltage stress of 1800V, for staying trouble free service allowance, select the metal-oxide-semiconductor of 2000V, and the metal-oxide-semiconductor of high pressure substantially can not find on market like this.
When frequency converter is 1140VAC input, its bus direct voltage is up to 2200VDC, at this time needs the switching tube of the withstand voltage 3000V of surpassing, also can not find such metal-oxide-semiconductor on Vehicles Collected from Market.
In sum, adopt the flyback power supply of common topology too high because switching tube bears voltage stress, can not find suitable switching tube, so be not suitable for the application scenario that input voltage surpasses 1000V.
Utility model content
For the defect of prior art, the purpose of this utility model is to provide a kind of high input voltage reverse exciting switching voltage regulator, is intended to solve existing reverse exciting switching voltage regulator and is not suitable for the problem that input voltage surpasses the application scenario of 1000V.
For achieving the above object, the utility model provides a kind of high input voltage reverse exciting switching voltage regulator, comprises that PWM controls the switch module that driver module, high frequency transformer and n are connected in series; The armature winding of described high frequency transformer comprises n section, is designated as respectively the first armature winding N
p1, the second armature winding N
p2... n armature winding N
pn; N is more than or equal to 2 positive integer; Each switch module comprises the first switching tube, the first resistance and the first electric capacity; One end of each section of armature winding is connected with one end of described the first switching tube, the other end of each section of armature winding is connected with the other end of described the first switching tube by described the first resistance, and the control end of described the first switching tube is controlled driver module with described PWM and is connected; Described the first electric capacity and described the first resistance are connected in parallel.
Further, described the first switching tube is metal-oxide-semiconductor, and the grid of described metal-oxide-semiconductor is as the control end of described the first switching tube, and the drain electrode of described metal-oxide-semiconductor is as one end of described the first switching tube, and the source electrode of described metal-oxide-semiconductor is as the other end of the first switching tube.
Further, described high input voltage reverse exciting switching voltage regulator also comprises error amplifier, diode D, capacitor C
0, resistance R
0, resistance R
01 and resistance R
02; The anode of described diode D is connected with one end of described high frequency transformer secondary winding Ns, described resistance R
01 with described resistance R
02 are connected in series between the negative electrode of described diode D and the other end of described high frequency transformer secondary winding Ns successively; Described capacitor C
0one end be connected with the negative electrode of described diode D, described capacitor C
0the other end be connected with the other end of described high frequency transformer secondary winding Ns; Described resistance R
0with described capacitor C
0be connected in parallel; An input of described error amplifier is connected to described resistance R
01 with described resistance R
02 be connected in series end, another input of described error amplifier is used for connecting reference voltage Vref, the output of described error amplifier is controlled driver module with described PWM and is connected.
The high input voltage reverse exciting switching voltage regulator that the utility model provides adopts n switching tube, and the armature winding of high frequency transformer is divided into n section, and the stress that switching tube is subject to is original 1/n, and this high input voltage reverse exciting switching voltage regulator can connect very high input voltage.
Accompanying drawing explanation
Fig. 1 is the physical circuit figure of the reverse exciting switching voltage regulator that provides of prior art;
Fig. 2 is the physical circuit figure that the utility model provides the high input voltage reverse exciting switching voltage regulator with two switching tubes;
Fig. 3 is the physical circuit figure that the utility model provides the high input voltage reverse exciting switching voltage regulator with n switching tube, and n is more than or equal to 2 positive integer.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model relates to a kind of high input voltage reverse exciting switching voltage regulator, is used for the high voltage of for example frequency changer direct current bus to change into after safety low-voltage, to veneer, powers.The high input voltage reverse exciting switching voltage regulator that the utility model provides adopts two switching tubes, the armature winding of high frequency transformer is divided into two parts, the stress that switching tube is subject to is like this original half, if divide n part armature winding, the voltage stress bearing so will be original 1/n, so this topology Switching Power Supply can connect very high input voltage.The utility model adopts a plurality of switching tubes and Multi-segment primary inductance serial connection, to reach, reduces the voltage stress object that metal-oxide-semiconductor bears, and can use low pressure metal-oxide-semiconductor to remove to make high-voltage switch power supply.
As shown in Figure 2, when n equals 2, high frequency transformer is elementary is divided into two sections, receives respectively switching tube Q1 and Q2, one end of switching tube Q1 and the first armature winding N
p1one end connect, the other end of switching tube Q1 is by resistance R 1 and the first armature winding N
p1the other end connect, the V of the control end of switching tube Q1 and PWM control driver module
b1end connects, and capacitor C 1 is connected in parallel with resistance R 1.One end of switching tube Q2 and the second armature winding N
p2one end connect, the other end of switching tube Q2 is by resistance R 2 and the second armature winding N
p2the other end connect, the V of the control end of switching tube Q2 and PWM control driver module
b2end connects, and capacitor C 2 is connected in parallel with resistance R 2; The second armature winding N
p2the other end be also connected with one end of switching tube Q1.
Two suffered voltage stresss of switching tube are: 1/2*(Vdc+n*Vout), other partial circuit electric currents are the same with common flyback power supply, in the time of work, drive and while on-off switching tube Q1 and switching tube Q2, so operation principle is also the same with common flyback power supply simultaneously.When driving, switching tube Q1 and switching tube Q2 are opened, the first armature winding N
p1with the second armature winding N
p2series connection is on busbar voltage Vdc, and two winding both end voltage are all 1/2*Vdc, now transformer energy storage.When driving is closed, switching tube Q1 and switching tube Q2 are closed, and transformer releases energy by secondary, now at the first armature winding N
p1with the second armature winding N
p2on all produce " flyback " voltage and be 1/2*n*Vout, so the voltage 1/2*Vdc when voltage stress that now switching tube Q1 and switching tube Q2 are subject to is conducting on segmentation inductance adds " flyback " voltage 1/2*n*Vout when turn-offing, after summation, be: 1/2*(Vdc+n*Vout), be 1/2 of common flyback electric source topology.
In foregoing circuit, resistance R 1 and resistance R 2 play all pressure effects, the capacitance of capacitor C 1 and capacitor C 2 can be very little, play and stablize equal component voltage effect, when there is fuctuation within a narrow range in segmentation inductance both end voltage, capacitor C 1 and 2 short time of capacitor C can reduce voltage fluctuation, and the uneven impact of voltage that device discreteness is caused is reduced to minimum.The utility model topology all presses effect to be much better than the power supply that adopts two flyback topologys, two flyback topological powers also adopt two switching tubes, two switching tubes all can be clamped at input voltage Vdc, but when working as a switching tube by clamper, another one power supply just can not be by clamper, cause the unbalanced of two switch tube voltages, will cause like this one of them switching tube temperature high, and the not high unbalanced phenomena of another one switching tube temperature.And the utility model is to adopt segmentation primary inductance form all to press, then stablized with peripheral parallel resistance electric capacity, and two flyback power supply has essential difference.
In application, as the bus direct voltage of certain frequency converter is up to 1200VDC, when using common flyback electric source topology, its switching tube receives that voltage stress will be over 1800V.If use the utility model topology, use two switching tubes, and primary inductance is divided into two parts, the voltage stress that its single switching transistor is subject to will be reduced to 900V, use so the withstand voltage metal-oxide-semiconductor of 1500V just can meet this demand.The same two flyback topologys that adopt two switching tubes, its switch tube voltage stress is clamped at input voltage Vdc, is 1200V.
If input voltage is higher, can what be gone here and there elementary more, adopt a plurality of switching tubes, high frequency transformer adopts multistage, and transformer can be made one, can be also a plurality of, a plurality of primary inductances that are connected into, it bears voltage divides equally, as shown in Figure 3.Also can make modular, each module is by a switching tube, transformer that contains primary and secondary winding and other general all pressing and necessary absorbing circuit, according to the height of input voltage come configuration module number, to reach corresponding withstand voltage demand.
In the time of design the utility model power transformer, the same with common flyback power supply.For example, the primary turns that calculates common flyback transformer is 100 circles, if primary inductance is divided into two sections, uses two switching tubes, so only need, two sections of winding leading-out wires when making transformer, not need to change any parameter.
In the utility model, the drive circuit of high input voltage reverse exciting switching voltage regulator need to be considered the isolation that each road drives, the general transformer isolation technology that adopts is carried out isolation drive, the driving signal that the elementary reception of transformer comes from PWM chip, the secondary output drive signal of transformer, can export n and drive signal.For example adopt two switching tubes, because the current potential of two switching tubes is unequal, so need to isolate with driving transformer.If there are a plurality of switching tubes, need to provide the driving signal of a plurality of isolation, a plurality of signals are opened simultaneously and are closed simultaneously.
In the high input voltage reverse exciting switching voltage regulator that the utility model provides, when be input as over 1000V high pressure time, the switching tube of primary circuit adopts a plurality of metal-oxide-semiconductors, the primary coil of high frequency transformer is divided into multistage, can effectively reduce metal-oxide-semiconductor voltage stress like this, allow low pressure metal-oxide-semiconductor be applied in high input voltage Switching Power Supply.A plurality of switching tubes are to open simultaneously and turn-off simultaneously in addition, and drive part is realized isolation by driving transformer.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. a high input voltage reverse exciting switching voltage regulator, is characterized in that, comprises that PWM controls the switch module that driver module, high frequency transformer and n are connected in series;
The armature winding of described high frequency transformer comprises n section, is designated as respectively the first armature winding N
p1, the second armature winding N
p2... n armature winding N
pn; N is more than or equal to 2 positive integer;
Each switch module comprises the first switching tube, the first resistance and the first electric capacity;
One end of each section of armature winding is connected with one end of described the first switching tube, the other end of each section of armature winding is connected with the other end of described the first switching tube by described the first resistance, and the control end of described the first switching tube is controlled driver module with described PWM and is connected;
Described the first electric capacity and described the first resistance are connected in parallel.
2. high input voltage reverse exciting switching voltage regulator as claimed in claim 1, it is characterized in that, described the first switching tube is metal-oxide-semiconductor, the grid of described metal-oxide-semiconductor is as the control end of described the first switching tube, the drain electrode of described metal-oxide-semiconductor is as one end of described the first switching tube, and the source electrode of described metal-oxide-semiconductor is as the other end of the first switching tube.
3. high input voltage reverse exciting switching voltage regulator as claimed in claim 1, is characterized in that, described high input voltage reverse exciting switching voltage regulator also comprises error amplifier, diode D, capacitor C
0, resistance R
0, resistance R
01 and resistance R
02;
The anode of described diode D is connected with one end of described high frequency transformer secondary winding Ns, described resistance R
01 with described resistance R
02 are connected in series between the negative electrode of described diode D and the other end of described high frequency transformer secondary winding Ns successively;
Described capacitor C
0one end be connected with the negative electrode of described diode D, described capacitor C
0the other end be connected with the other end of described high frequency transformer secondary winding Ns;
Described resistance R
0with described capacitor C
0be connected in parallel;
An input of described error amplifier is connected to described resistance R
01 with described resistance R
02 be connected in series end, another input of described error amplifier is used for connecting reference voltage Vref, the output of described error amplifier is controlled driver module with described PWM and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751823.9U CN203554299U (en) | 2013-11-25 | 2013-11-25 | High-voltage input flyback switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751823.9U CN203554299U (en) | 2013-11-25 | 2013-11-25 | High-voltage input flyback switching power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203554299U true CN203554299U (en) | 2014-04-16 |
Family
ID=50472360
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|---|---|---|---|
| CN201320751823.9U Expired - Lifetime CN203554299U (en) | 2013-11-25 | 2013-11-25 | High-voltage input flyback switching power supply |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218807A (en) * | 2014-08-22 | 2014-12-17 | 国家电网公司 | High-voltage-resistant switching power supply |
| CN105099209A (en) * | 2015-09-17 | 2015-11-25 | 航天长峰朝阳电源有限公司 | Integrated serial-connection and parallel-connection combined type double-flyback circuit convertor |
| CN106655825A (en) * | 2016-12-02 | 2017-05-10 | 杭州明特科技有限公司 | Switching power supply of electric energy meter |
| CN108233723A (en) * | 2018-03-26 | 2018-06-29 | 珠海格力电器股份有限公司 | Circuit of reversed excitation and flyback converter |
| CN108322021A (en) * | 2017-12-28 | 2018-07-24 | 上海澳通韦尔电力电子有限公司 | A kind of accessory power supply driving circuit for high voltage dc bus power supply |
| CN109004838A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
| WO2020034664A1 (en) * | 2018-08-14 | 2020-02-20 | 广州金升阳科技有限公司 | Multilevel step-down circuit |
| CN111030469A (en) * | 2019-12-26 | 2020-04-17 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
-
2013
- 2013-11-25 CN CN201320751823.9U patent/CN203554299U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218807A (en) * | 2014-08-22 | 2014-12-17 | 国家电网公司 | High-voltage-resistant switching power supply |
| CN105099209A (en) * | 2015-09-17 | 2015-11-25 | 航天长峰朝阳电源有限公司 | Integrated serial-connection and parallel-connection combined type double-flyback circuit convertor |
| CN106655825A (en) * | 2016-12-02 | 2017-05-10 | 杭州明特科技有限公司 | Switching power supply of electric energy meter |
| CN108322021A (en) * | 2017-12-28 | 2018-07-24 | 上海澳通韦尔电力电子有限公司 | A kind of accessory power supply driving circuit for high voltage dc bus power supply |
| CN108322021B (en) * | 2017-12-28 | 2021-05-04 | 上海澳通韦尔电力电子有限公司 | Auxiliary power supply driving circuit for high-voltage direct-current bus power supply |
| CN108233723A (en) * | 2018-03-26 | 2018-06-29 | 珠海格力电器股份有限公司 | Circuit of reversed excitation and flyback converter |
| CN109004838A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN109004838B (en) * | 2018-07-13 | 2023-11-24 | 广州金升阳科技有限公司 | High withstand voltage flyback converter |
| WO2020034664A1 (en) * | 2018-08-14 | 2020-02-20 | 广州金升阳科技有限公司 | Multilevel step-down circuit |
| CN110212777A (en) * | 2019-06-19 | 2019-09-06 | 杰华特微电子（杭州）有限公司 | The control circuit and control method for cascading circuit of reversed excitation, cascading circuit of reversed excitation |
| CN111030469A (en) * | 2019-12-26 | 2020-04-17 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
| CN111030469B (en) * | 2019-12-26 | 2021-05-18 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
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Granted publication date: 20140416 |