CN102185481A - Constant current source - Google Patents
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- CN102185481A CN102185481A CN2011100869117A CN201110086911A CN102185481A CN 102185481 A CN102185481 A CN 102185481A CN 2011100869117 A CN2011100869117 A CN 2011100869117A CN 201110086911 A CN201110086911 A CN 201110086911A CN 102185481 A CN102185481 A CN 102185481A
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- 238000001914 filtration Methods 0.000 claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000002955 isolation Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 208000032365 Electromagnetic interference Diseases 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to the technical field of switching power supplies, in particular to a constant current source. The constant current source comprises an input alternating current (AC) signal unit, an input stage electro-magnetic interference (EMI) filtering unit, a rectifying circuit unit, a power factor correction (PFC) detection circuit unit, a main control loop unit, a main switching circuit unit, a transformer isolating circuit unit, an output rectifying and filtering circuit and a current sampling control loop unit. A high-frequency switching current signal output by the transformer isolating circuit unit is acquired through the current sampling control loop unit, and the output high-frequency switching current signal is processed and fed into the main control loop unit, so that the output current is a constant value, the cost of the constant current source is reduced, and the volume is reduced.
Description
Technical field
The present invention relates to the switch power technology field, particularly a kind of constant-current source.
Background technology
At present, the constant-current source of AC (alternating current) input is widely used in light-emitting diode (LightEmitting Diode, LED) illumination, the LED illumination is current illumination developing direction, need dimming function, dimming function reality on constant-current source is the output current regulating function, and the constant-current source with dimming function adopts the chip of specialty to realize usually, make that the cost of constant-current source can't effectively be reduced, volume is further miniaturization also.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how to reduce constant-current source cost, reduce the volume of constant-current source.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of constant-current source, comprising:
Input AC signal element is used for input AC electricity AC signal;
Input stage EMI filter unit links to each other with described input AC signal element, is used for the alternating current AC signal filtering to being imported;
The rectification circuit unit links to each other with described input stage EMI filter unit, and being used for filtered alternating current AC signal rectification is the pulsating direct current signal of telecommunication;
PFC testing circuit unit links to each other with described rectification circuit unit, is used for the zero passage detection of carrying out to the described pulsating direct current signal of telecommunication, and detects the peak value of this pulsating direct current signal of telecommunication;
The main control loop unit links to each other with described PFC testing circuit unit, is used to receive the reference signal from PFC testing circuit unit, and this reference signal is carried out Active PFC PFC control;
The main switch circuit unit, link to each other with the main control loop unit with described rectification circuit unit respectively, so that the pulsating direct current signal of telecommunication of described rectification circuit unit output enters the main switch circuit unit, the main switch circuit unit is converted into the pulsating direct current signal of telecommunication high-frequency switching signal of power frequency component modulation under the control of described main control loop unit;
The transformer isolation circuit unit links to each other with described main switch circuit unit, is used for the high-frequency switching signal isolated variable;
The output rectification filtering unit links to each other with described transformer isolation circuit unit, is used for the high-frequency switching signal rectifying and wave-filtering to the output of transformer isolation circuit unit;
Current sample control loop unit, its input links to each other with the transformer isolation circuit unit, its output links to each other with the main control loop unit, be used to obtain the HF switch current signal of transformer isolation circuit unit output, and after the HF switch current signal of described output handled, send into described main control loop unit, so that output current is a steady state value.
Wherein, described current sample control loop unit comprises the processing that described high-frequency signal carries out: rectification, filtering and sampling.
Wherein, described constant-current source also comprises: the active clamp circuit unit, link to each other with the main switch circuit unit with described main control loop unit respectively, be used for described main switch circuit unit being carried out clamper control, to realize soft switch according to the control signal of described main control loop unit.
Wherein, described constant-current source also comprises: the POT current regulation unit, link to each other with described current sample control loop unit, and be used for the described HF switch current signal that described current sample control loop unit obtains is adjusted, to regulate the current value of output current.
Wherein, described constant-current source also comprises: the PWM current regulation unit, be connected with described output rectification filtering unit, and be used to regulate the current value of output current.
Wherein, described Switching Power Supply also comprises: the voltage feedback loop unit, its input links to each other with described output rectification filtering unit, its output links to each other with described main control loop unit, described voltage feedback loop unit is used for acquisition process output rectification filtering unit after handling treats output signal, and send into described main control loop unit, with real-time control output voltage.
Wherein, described Switching Power Supply also comprises: the current feedback circuit unit, its input links to each other with described main switch circuit unit, its output links to each other with described main control loop unit, described current feedback circuit unit is used for the main control loop unit is sent in the electric current variation of main switch circuit unit, with real-time control output current.
Wherein, described Switching Power Supply also comprises: the output loading unit, link to each other with described output rectification filtering unit, and be used to receive the high-frequency switching signal of described output rectification filtering unit output.
Wherein, described power frequency component is identical with the pulsating direct current electrical signal phase of being imported.
(3) beneficial effect
The present invention is by being provided with the HF switch current signal that current sample control loop unit obtains the output of transformer isolation circuit unit, and after the HF switch current signal of described output handled, send into described main control loop unit, so that output current is a steady state value, the reduction of constant-current source cost and reducing of volume have been realized.
Description of drawings
Fig. 1 is the structured flowchart according to the constant-current source of an embodiment of the present invention;
Fig. 2 is the concrete structure schematic diagram of constant-current source shown in Figure 1.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is according to the structured flowchart of the constant-current source of an embodiment of the present invention, comprising: input AC signal element, input stage EMI filter circuit unit 2, PFC testing circuit unit 3, rectification circuit unit 4, main control loop unit 5, main switch circuit unit 6, transformer isolation circuit unit 7, output rectifier and filter unit 8, output loading unit 9, voltage feedback circuit unit 10, current feedback loop unit 11, current sample control loop unit 12, active clamp circuit unit 13, POT current regulation unit 14 and PWM current regulation unit 15.
In the present embodiment, alternating current AC signal is after input AC signal element 1 enters input stage EMI filter circuit unit 2, enter rectification circuit unit 4, be rectified into the pulsating direct current signal of telecommunication, PFC testing circuit unit 3 detects zero passage, the peak value of the pulsating direct current signal of telecommunication, send into main control loop unit 5, for Active PFC PFC control provides reference signal; Rectified alternating current directly enters main switch circuit unit 6, Rectified alternating current is converted into the high-frequency switching signal of 50HZ (or 60HZ) power frequency component (this power frequency component is identical with input pulsating direct current electrical signal phase) modulation by the main switch circuit unit 6 of main control loop unit 5 controls, high-frequency switching signal is behind transformer isolation circuit unit 7 isolated variables, the high-frequency switching signal that output needs, behind output rectifier and filter unit 8 rectifying and wave-filterings, deliver to load end; Current sample control loop unit 12 obtains the HF switch current signal of transformer isolation circuit unit 7 outputs, and after described high-frequency switching signal handled (rectification, filtering and sampling), send in the described main control loop unit 5, to realize that output current is a steady state value; Current feedback loop unit 11 changes the electric current of main switch circuit sends into main control loop unit 5, is used as output current changed to be controlled in main control loop unit 5 in real time, and short circuit, over-current phenomenon avoidance that load end occurs are controlled; Main control loop unit 5 is sent into after with the signal acquisition process in the output loading in voltage feedback loop unit 10, is used for output voltage is controlled in real time, guarantees that output voltage fluctuates in the control range of needs; Active clamp circuit unit 13 carries out clamper control according to the control signal of described main control loop unit 5 to described main switch circuit unit 6, to realize soft switch; The described HF switch current signal that 14 pairs of described current sample control loops of outer meeting resistance modulation POT current regulation unit unit 12 obtains is adjusted, to realize regulating the current value of output current; Pulse-width modulation PWM current regulation unit 15 is regulated the current value of output current.
Fig. 2 is the concrete structure schematic diagram of constant-current source shown in Figure 1, be that example illustrates the present invention below with Fig. 2, the AC signal of input 100-300V is handled through the prime EMC of C1 (safety electric capacity), L1 (common mode inductance) and C2 (safety electric capacity), L2 (common mode inductance) and C3 (safety electric capacity), enter rectifier bridge D1, become the pulsating direct current signal of telecommunication of 50HZ (or 60HZ), level EMC handles behind C5 (safety electric capacity), and the pulsating direct current signal of telecommunication enters main switch circuit.
The pulsating direct current signal of telecommunication is through dividing potential drop, the Filtering Processing of R10, R11, R12, R13, R14, R15, R16, R17, C13, C14, send into the PFC testing circuit of main control loop, finish detection, for the same-phase that realizes voltage, electric current provides foundation to phase place, peak value.
The pulsating direct current signal of telecommunication is handled through rectification, filtering and the current limliting of D7, C8, R1, for main control loop provides the startup energy.
The pulsating direct current signal of telecommunication is through T1, Q1, R3, forms the main circuit of importation, for the output stage of transformer T1 provides controlled power conversion.
Transformer T1 output provides the energy of voltage, controlled current through D12, C20, C21, C22, the rectification of C23, L3, Filtering Processing for client's load.
(former limit is 1 circle to L5, secondary is the transformer of N circle) be connected on the output of transformer T1, output current signal is converted into available voltage signal, after the D16 rectification, through C26, C27 carries out filtering, output current signal is converted into operable d. c. voltage signal, through R28, the R29 resistance sampling, deliver among the U3 by R30, when sampling voltage surpasses setting voltage, the U4 conducting, overvoltage signal (conversion of overcurrent signal) is sent among the U1 of main control loop unit 5 through U2, realized the constant current control of output current, setting voltage can be by R30, R31 sets, and realizes the setting to output current constant current controlling value.
Present popular active clamp circuit, all be to adopt the leakage inductance of electric capacity and main transformer to carry out the mode of parallel resonance, the sort circuit topology, causing control signal to isolate floatingly handles, just can be used for driving clamper tube, the control signal section processes complexity that causes active clamp circuit, because present embodiment adopts the control chip of two-way output, and the control signal of two-way output has the Dead Time that can regulate, so just guaranteed the operate as normal that active clamp circuit drives, in the present embodiment, the control signal control Q3's of active clamp circuit is open-minded, leakage inductance by C30 and T1 forms series resonant tank, and the voltage on C30 realizes that near in zero Q1's is open-minded, to realize soft switch, because the S of Q3 extremely directly is connected on the earth-return of circuit, so just can realize the direct driving of control chip to Q3, has so just simplified driving circuit section.
Between POT DIM contact and A contact, connect adjustable resistance, can realize electric current on the R31 is flow through in change, so just can go up the voltage signal that detects to U4 changes, change with the constant current controlling value that realizes output current, the output current of determining (constant current) can be regulated between 10%～100%, in like manner, between POT DIM contact and B contact, connect adjustable resistance, realized change equally, the output current of determining (constant current) can have been regulated between 100%～150% the constant current controlling value of output current.
On output loop, insert Q4, when external pwm signal is imported, Q4 carries out conducting, shutoff according to pwm signal, thereby realize external PWM control to output current, the output current of determining (constant current) is regulated between 10%～100%, the output current that can guarantee T1 so under any circumstance can not surpass the output constant current controlling value of setting.
Through R6, R35 feedback circuit, input stage is fed back to main control loop by the current signal that R3 takes a sample, controlling for the variation of main circuit current provides foundation.
Through the winding of transformer T1, by the processing of D4, D5, D6, C6, C7, for main control loop provides the continuous and reliable energy.
Reach the circuit that links to each other with U2 by U2, realize output voltage signal is fed back to main control loop, for the controlled of output voltage given security.
Above execution mode only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (9)
1. a constant-current source is characterized in that, comprising:
Input AC signal element (1) is used for input AC electricity AC signal;
Input stage EMI filter unit (2) links to each other with described input AC signal element (1), is used for the alternating current AC signal filtering to being imported;
Rectification circuit unit (4) links to each other with described input stage EMI filter unit (2), and being used for filtered alternating current AC signal rectification is the pulsating direct current signal of telecommunication;
PFC testing circuit unit (3) links to each other with described rectification circuit unit (4), is used for the zero passage detection of carrying out to the described pulsating direct current signal of telecommunication, and detects the peak value of this pulsating direct current signal of telecommunication;
Main control loop unit (5) links to each other with described PFC testing circuit unit (3), is used for receiving the reference signal from PFC testing circuit unit (3), and this reference signal is carried out Active PFC PFC control;
Main switch circuit unit (6), link to each other with main control loop unit (5) with described rectification circuit unit (4) respectively, so that the pulsating direct current signal of telecommunication of described rectification circuit unit (4) output enters the main switch circuit unit, main switch circuit unit (6) are converted into the pulsating direct current signal of telecommunication high-frequency switching signal of power frequency component modulation under the control of described main control loop unit (5);
Transformer isolation circuit unit (7) links to each other with described main switch circuit unit (6), is used for the high-frequency switching signal isolated variable;
Output rectification filtering unit (8) links to each other with described transformer isolation circuit unit (7), is used for the high-frequency switching signal rectifying and wave-filtering to transformer isolation circuit unit (7) output;
Current sample control loop unit (12), its input links to each other with transformer isolation circuit unit (7), its output links to each other with main control loop unit (5), be used to obtain the HF switch current signal of transformer isolation circuit unit (7) output, and after the HF switch current signal of described output handled, send into described main control loop unit (5), so that output current is a steady state value.
2. constant-current source as claimed in claim 1 is characterized in that, described current sample control loop unit (12) comprises the processing that described high-frequency signal carries out: rectification, filtering and sampling.
3. constant-current source as claimed in claim 1, it is characterized in that, described constant-current source also comprises: active clamp circuit unit (13), link to each other with main switch circuit unit (6) with described main control loop unit (5) respectively, be used for described main switch circuit unit (6) being carried out clamper control, to realize soft switch according to the control signal of described main control loop unit (5).
4. constant-current source as claimed in claim 1, it is characterized in that, described constant-current source also comprises: POT current regulation unit (14), link to each other with described current sample control loop unit (12), be used for the described HF switch current signal that described current sample control loop unit (12) obtains is adjusted, to regulate the current value of output current.
5. constant-current source as claimed in claim 1 is characterized in that, described constant-current source also comprises: PWM current regulation unit (15), be connected with described output rectification filtering unit (8), and be used to regulate the current value of output current.
6. Switching Power Supply as claimed in claim 1, it is characterized in that, described Switching Power Supply also comprises: voltage feedback loop unit (10), its input links to each other with described output rectification filtering unit (8), its output links to each other with described main control loop unit (5), described voltage feedback loop unit (10) is used for acquisition process output rectification filtering unit (8) after handling treats output signal, and sends into described main control loop unit (5), with real-time control output voltage.
7. constant-current source as claimed in claim 1, it is characterized in that, described Switching Power Supply also comprises: current feedback circuit unit (11), its input links to each other with described main switch circuit unit (6), its output links to each other with described main control loop unit (5), described current feedback circuit unit (11) is used for main control loop unit (5) is sent in the electric current variation of main switch circuit unit (6), with real-time control output current.
8. constant-current source as claimed in claim 1 is characterized in that, described Switching Power Supply also comprises: output loading unit (9), link to each other with described output rectification filtering unit (8), be used to receive the high-frequency switching signal of described output rectification filtering unit (8) output.
9. as each described constant-current source of claim 1～8, it is characterized in that described power frequency component is identical with the pulsating direct current electrical signal phase of being imported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100869117A CN102185481B (en) | 2011-04-07 | 2011-04-07 | Constant current source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100869117A CN102185481B (en) | 2011-04-07 | 2011-04-07 | Constant current source |
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| CN102185481A true CN102185481A (en) | 2011-09-14 |
| CN102185481B CN102185481B (en) | 2013-09-25 |
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| CN2011100869117A Active CN102185481B (en) | 2011-04-07 | 2011-04-07 | Constant current source |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882389A (en) * | 2012-10-16 | 2013-01-16 | 周建文 | Constant current source |
| CN107167515A (en) * | 2017-07-18 | 2017-09-15 | 中国石油化工股份有限公司 | A kind of control method of quick constant current |
| WO2019056318A1 (en) * | 2017-09-22 | 2019-03-28 | Oppo广东移动通信有限公司 | Power supply circuit, power supply device, and control method |
| CN113093850A (en) * | 2021-03-17 | 2021-07-09 | 海安天一智控设备有限公司 | Method for generating standard sine wave AC constant current source |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2847345Y (en) * | 2005-06-07 | 2006-12-13 | 杨义根 | Constant current controller for switch power source |
| CN101860236A (en) * | 2010-05-07 | 2010-10-13 | 马生茂 | Switching power supply |
| CN201663734U (en) * | 2010-01-03 | 2010-12-01 | 无锡职业技术学院 | Constant-current driving power supply for LED desk lamp |
-
2011
- 2011-04-07 CN CN2011100869117A patent/CN102185481B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2847345Y (en) * | 2005-06-07 | 2006-12-13 | 杨义根 | Constant current controller for switch power source |
| CN201663734U (en) * | 2010-01-03 | 2010-12-01 | 无锡职业技术学院 | Constant-current driving power supply for LED desk lamp |
| CN101860236A (en) * | 2010-05-07 | 2010-10-13 | 马生茂 | Switching power supply |
Non-Patent Citations (1)
| Title |
|---|
| NATIONAL SEMICONDUCTOR: "LM5025 Active Clamp Voltage Mode PWM Controller", 《WWW.NATIONAL.COM》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882389A (en) * | 2012-10-16 | 2013-01-16 | 周建文 | Constant current source |
| CN107167515A (en) * | 2017-07-18 | 2017-09-15 | 中国石油化工股份有限公司 | A kind of control method of quick constant current |
| WO2019056318A1 (en) * | 2017-09-22 | 2019-03-28 | Oppo广东移动通信有限公司 | Power supply circuit, power supply device, and control method |
| US11251712B2 (en) | 2017-09-22 | 2022-02-15 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Power supply circuit, power supply device and control method |
| CN113093850A (en) * | 2021-03-17 | 2021-07-09 | 海安天一智控设备有限公司 | Method for generating standard sine wave AC constant current source |
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| CN102185481B (en) | 2013-09-25 |
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