CN108832811A - A kind of constant current output converter of Width funtion input - Google Patents
A kind of constant current output converter of Width funtion input Download PDFInfo
- Publication number
- CN108832811A CN108832811A CN201810719632.1A CN201810719632A CN108832811A CN 108832811 A CN108832811 A CN 108832811A CN 201810719632 A CN201810719632 A CN 201810719632A CN 108832811 A CN108832811 A CN 108832811A
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- Prior art keywords
- inductance
- capacitor
- filter
- load
- switching tube
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of constant current output converter of Width funtion input, including direct-current input power supplying, the first inductance, switching tube, freewheeling diode, first capacitor, filter capacitor, filter inductance, the second inductance and load.It is primarily characterized in that：The anode of the direct-current input power supplying is connect with first inductance one end.The connection of one end of the other end of first inductance and the drain electrode of switching tube and capacitor.The other end of capacitor and anode, one end of load and one end of filter capacitor of freewheeling diode connect.The other end of load and one end of filter inductance connect.One end connection of the other end, the second inductance of the other end and filter capacitor of filter inductance.The other end of second inductance and cathode, the source electrode of switching tube and the cathode of direct-current input power supplying of freewheeling diode connect.By the conducting and shutdown of control switch pipe, circuit of the present invention can export constant DC current in very wide input voltage range, and have quick response speed.
Description
Technical field
The present invention relates to field of power electronics, and in particular to a kind of constant current output converter of Width funtion input.
Background technique
Constant-current source is wealthy in being widely used for industrial circle, can be used as great power LED driving, battery charging etc..Tradition
Boost constant current output or Buck constant current output converter can only be worked normally under relatively narrow input voltage, can not be in width
Work in voltage range.And Buck or Boost realize constant current output, and essence is still by changing output electricity
The size of pressure changes output electric current, and response speed is slower.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, propose that a kind of constant current output of Width funtion input becomes
Parallel operation, and there is quick response speed.
The purpose of the present invention is realized at least through following technical solution.
Direct-current input power supplying V is specifically included in circuit of the present inventionin, the first inductance, switching tube, freewheeling diode, the first electricity
Appearance, filter capacitor, filter inductance, the second inductance and load.
The specific connection type of circuit of the present invention is：Direct-current input power supplying VinAnode connect with first inductance one end.The
The connection of one end of the other end of one inductance and the drain electrode of switching tube and capacitor.The other end of capacitor and the sun of freewheeling diode
Pole, one end of load are connected with one end of filter capacitor.The other end of load and one end of filter inductance connect.Filter inductance
One end connection of the other end of the other end and filter capacitor, the second inductance.The other end of second inductance and the yin of freewheeling diode
Pole, the source electrode of switching tube are connected with the cathode of direct-current input power supplying.
Compared with prior art, circuit of the present invention have the advantage that for：Compared to traditional Boost Buck constant current output
Converter, circuit of the present invention can export constant DC current in very wide input voltage range, and have quick
Response speed.
Detailed description of the invention
Fig. 1 is a kind of constant current output transformer configuration figure of Width funtion input.
Fig. 2 is the voltage and current waveform of a switch periods main element.
Fig. 3 a~3b is circuit modal graph in a switch periods T.
Specific embodiment
Specific embodiments of the present invention are specifically described below in conjunction with attached drawing, but implementation of the invention is not limited to
This, if it need to be pointed out that having the not special symbol or process of detailed description below, it is existing to be that those skilled in the art can refer to
Technology realize or understand.
The Basic Topological of this example and each main element voltage and current reference direction are as shown in Figure 1.
A kind of constant current output converter of Width funtion input, including direct-current input power supplying, the first inductance L1, it is switching tube S, continuous
Flow diode VD1, first capacitor C1, filter capacitor Cf, filter inductance Lf, the second inductance L2And load.The direct current inputs electricity
Anode and the first inductance L in source1One end connection；First inductance L1Other end and switching tube S drain electrode and capacitor C1One end
Connection；Capacitor C1The other end and freewheeling diode VD1Anode, load one end and filter capacitor CfOne end connection；Load
The other end and filter inductance LfOne end connection；Filter inductance LfThe other end and filter capacitor CfThe other end, the second inductance
L2One end connection；Second inductance L2The other end and freewheeling diode VD1Cathode, switching tube S source electrode and direct current input electricity
Source VinCathode connection.
For easy analysis, the device in circuit structure is accordingly to be regarded as ideal component.The driving signal of switching tube S, the first electricity
Feel L1Electric current IL1, the second inductance L2Electric current IL2, capacitor C1Both end voltage, load current IOWaveform diagram is as shown in Figure 2.
In t0~t1In the stage, circuit is as shown in Figure 3a in the modal graph in this stage, the driving voltage V of switching tube SgFrom low electricity
It is flat to become high level, switching tube S conducting, direct-current input power supplying VinTo the first inductance L1Charging, while first capacitor C1By opening
Pipe S is closed to the second inductance L2Charging and load supplying.
In t1~t2In the stage, circuit is as shown in Figure 3b in the modal graph in this stage, the driving voltage V of switching tube SgFrom high electricity
It is flat to become low level, switching tube S shutdown, freewheeling diode VD1Conducting, DC input voitage VinWith the first inductance L1Together to the
One capacitor C1Charging, the second inductance L2Powering load.
In order to reduce the second inductance L2Volume, LC filter circuit is added, filters out high-frequency current ripple in load
Available constant DC current.
Circuit output current size of the present invention is analyzed as follows.
By the voltage-second balance principle of inductance, the first inductance L1In switch conduction, both end voltage is Vin, the first inductance L1?
Both end voltage is V when switch OFFC1-Vin, it can thus be concluded that formula (1) and (2).
VinD=(VC1-Vin)(1-D) (1)
It is constant by the electric current on filtering back loading, it is believed that the voltage in load is constant for VO, the second inductance L2It is led in switch
Both end voltage is V when logicalC1-VO, the second inductance L2In switch conduction, both end voltage is VO, it can thus be concluded that formula (3)~(5).
VO=IOR (3)
(VC1-VO) D=VO(1-D) (4)
It is by the size of current that formula (2) and (5) can must load
In the case where input voltage and load R fixed, the i.e. adjustable output of the adjustment duty ratio D size known to formula (6)
Size of current, and adjustable range very it is wide theoretically can from zero to infinity, and can in wide-voltage range output constant current.
Due to directly controlling the second inductance L2On electric current, the response speed of electric current loop will be significantly faster than Voltage loop, therefore present invention electricity
Road can guarantee cracking current response rate.
Claims (3)
1. a kind of constant current output converter of Width funtion input, it is characterised in that including direct-current input power supplying, the first inductance (L1)、
Switching tube (S), freewheeling diode (VD1), first capacitor (C1), filter capacitor (Cf), filter inductance (Lf), the second inductance (L2) and
Load.
2. being primarily characterized in that according to the constant current output converter that right 1 requires a kind of Width funtion to input：Described
Anode and the first inductance (L of direct-current input power supplying1) one end connection；First inductance (L1) other end and switching tube (S) leakage
Pole and capacitor (C1) one end connection；Capacitor (C1) the other end and freewheeling diode (VD1) anode, load one end and filter
Wave capacitor (Cf) one end connection；The other end and filter inductance (L of loadf) one end connection；Filter inductance (Lf) the other end
With filter capacitor (Cf) the other end, the second inductance (L2) one end connection；Second inductance (L2) the other end and freewheeling diode
(VD1) cathode, switching tube (S) source electrode and direct-current input power supplying VinCathode connection.
3. main feature exports electric current according to the constant current output converter that right 1 requires a kind of Width funtion to inputVinFor input voltage, D is duty ratio, and R is load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810719632.1A CN108832811A (en) | 2018-07-03 | 2018-07-03 | A kind of constant current output converter of Width funtion input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810719632.1A CN108832811A (en) | 2018-07-03 | 2018-07-03 | A kind of constant current output converter of Width funtion input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108832811A true CN108832811A (en) | 2018-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810719632.1A Pending CN108832811A (en) | 2018-07-03 | 2018-07-03 | A kind of constant current output converter of Width funtion input |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374899A (en) * | 2019-07-31 | 2019-10-25 | 惠州汇能精电科技有限公司 | A kind of fan being applicable in super wide voltage range |
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|---|---|---|---|---|
| US20120063174A1 (en) * | 2010-09-15 | 2012-03-15 | Fuji Electric Co., Ltd. | Power factor correct current resonance converter |
| CN203136264U (en) * | 2013-02-27 | 2013-08-14 | 深圳市华高芯源科技有限公司 | Non-isolated wide range voltage input LED constant current driving power supply |
| CN103296883A (en) * | 2013-05-21 | 2013-09-11 | 西南交通大学 | Method and device for controlling direct-current-to-direct-current converter wide in input voltage and load range |
| CN204465970U (en) * | 2015-02-28 | 2015-07-08 | 皖西学院 | A kind of LED street lamp drive circuit based on HV9931 |
| CN107222100A (en) * | 2017-06-12 | 2017-09-29 | 福州大学 | A kind of integrated Buck Boost and LLC circuits single-stage LED drive circuit |
| CN107493638A (en) * | 2017-09-25 | 2017-12-19 | 江苏大学 | Based on BOOST BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive powers and switching method |
| CN108667286A (en) * | 2018-04-27 | 2018-10-16 | 华南理工大学 | A kind of pfc converter of constant current output |
| CN208849670U (en) * | 2018-07-03 | 2019-05-10 | 华南理工大学 | A kind of constant current output converter of Width funtion input |
-
2018
- 2018-07-03 CN CN201810719632.1A patent/CN108832811A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120063174A1 (en) * | 2010-09-15 | 2012-03-15 | Fuji Electric Co., Ltd. | Power factor correct current resonance converter |
| CN203136264U (en) * | 2013-02-27 | 2013-08-14 | 深圳市华高芯源科技有限公司 | Non-isolated wide range voltage input LED constant current driving power supply |
| CN103296883A (en) * | 2013-05-21 | 2013-09-11 | 西南交通大学 | Method and device for controlling direct-current-to-direct-current converter wide in input voltage and load range |
| CN204465970U (en) * | 2015-02-28 | 2015-07-08 | 皖西学院 | A kind of LED street lamp drive circuit based on HV9931 |
| CN107222100A (en) * | 2017-06-12 | 2017-09-29 | 福州大学 | A kind of integrated Buck Boost and LLC circuits single-stage LED drive circuit |
| CN107493638A (en) * | 2017-09-25 | 2017-12-19 | 江苏大学 | Based on BOOST BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive powers and switching method |
| CN108667286A (en) * | 2018-04-27 | 2018-10-16 | 华南理工大学 | A kind of pfc converter of constant current output |
| CN208849670U (en) * | 2018-07-03 | 2019-05-10 | 华南理工大学 | A kind of constant current output converter of Width funtion input |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374899A (en) * | 2019-07-31 | 2019-10-25 | 惠州汇能精电科技有限公司 | A kind of fan being applicable in super wide voltage range |
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Application publication date: 20181116 |