CN105491713A - High-power LED street lamp drive circuit - Google Patents
High-power LED street lamp drive circuit Download PDFInfo
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- CN105491713A CN105491713A CN201510982501.9A CN201510982501A CN105491713A CN 105491713 A CN105491713 A CN 105491713A CN 201510982501 A CN201510982501 A CN 201510982501A CN 105491713 A CN105491713 A CN 105491713A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a high-power LED street lamp drive circuit. A three-phase alternating current is connected with an EMI filter circuit through an anti-surge module; the three-phase alternating current becomes a pulsating direct current after passing through a full-bridge rectifier and outputs a direct current voltage under the action of a filter capacitor and an inductor; a master switch DC/AC circuit converts the direct current into a high-frequency pulse voltage to output at a secondary side of a transformer; a high-frequency pulse output by the transformer outputs a direct current power supply required by an LED street lamp through high-frequency rectifying, LC filtering and EMI filtering; voltage and current double-loop control is adopted by a PWM control circuit to achieve adjustment on the output voltage and limitation on the output current; a constant-current and constant-voltage device TSM101 and a comparator are adopted by a feedback network; the constant-current and constant-voltage device TSM101 adjusts the output voltage and current to form a constant-current and constant-voltage circuit; and a feedback signal is transmitted to a PFC device L6561 through an optocoupler. The high-power LED street lamp drive circuit has the beneficial effects that a complete EMC circuit and an efficient lightning protection circuit are internally installed in an outdoor LED street lamp power supply employing an active PFC function circuit design, so that the requirements of the safety and the electromagnetic compatibility are met.
Description
Technical field
The present invention relates to high-power LED illumination, specifically a kind of drive circuit for high-power LED street.
Background technology
LED street lamp is the driving element of low-voltage, big current, the intensity of its luminescence is determined by the electric current flowing through LED, electric current crosses the decay that can cause by force LED, electric current crosses the weak luminous intensity that can affect LED, therefore the driving of LED needs to provide constant-current supply, to ensure the fail safe that great power LED uses, reach desirable luminous intensity simultaneously.The shortcoming of above-mentioned technology is: need to solve step-down, isolation, PFC (Active PFC) and constant current problem with city's electric drive great power LED, also need higher conversion efficiency.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, and a kind of drive circuit for high-power LED street is provided.
The object of the invention is to be achieved through the following technical solutions.This drive circuit for high-power LED street, three-phase alternating current is connected with EMI filter circuit by Anti-surging module, the direct current that three-phase alternating current becomes pulsation after full-bridge rectification is under the effect of filter capacitor and inductance, output dc voltage, direct current is converted to the secondary output that high-frequency electrical pulses is pressed in transformer by main switch DC/AC circuit, the high-frequency impulse that transformer exports is through high-frequency rectification, LC filtering and EMI filtering, export the DC power supply that LED street lamp needs, pwm control circuit adopts electric current and voltage double-loop control, to realize the adjustment of output voltage and the restriction of output current, feedback network adopts constant current constant voltage device TSM101 and comparator, constant current constant voltage device TSM101 regulation output voltage and current forms constant-current constant-voltage circuit, feedback signal gives PFC device L6561 by optocoupler.
DC/DC circuit employing isolation inverse-excitation type, inverse-excitation type switch power-supply by transformer as energy-storage travelling wave tube; During switching tube conducting, transformer storage power, load current is provided by output filter capacitor; When switching tube turns off, the energy of storage is sent to load and output filter capacitor by transformer, provides separately the energy consumed during load current with building-out capacitor.
In constant-current constant-voltage circuit: Uout+ and Uout-is isolating transformer through the voltage of double diode and electrolytic capacitor filtering, output again after inductance L 4 and capacitor filtering is Uout+ and Uout-, for the output voltage of this power module, be directly added in LED street lamp; The size of adjustable resistor RV1 and RV2 difference regulation output voltage and current, R10 and R11 is the resistance of 22m Ω, respectively to the voltage and current sample that power supply exports, the output TOUT of TMS101 delivers to the pin 5 of PFC device L6561 by circuit such as photoelectrical coupler, controllable silicon and triodes, current constant control is realized by feedback circuit, device pin 8 connects accessory power supply, and pin 4 connects transformer T1 secondary ground.
In PFC device L6561, pin 8 is power input, is provided by the vice-side winding of transformer T1; Pin 7 is drive singal output pin, Direct driver metal-oxide-semiconductor VQ1; Pin 6 is that the ground of this pin and major loop connects together with reference to ground; Pin 5 is zero passage detection pin, for determining when conducting metal-oxide-semiconductor; The winding that the pin 1 of transformer T1 and pin 2 form, by resistance, inductive current zero cross signal is transferred to the pin 5 of this device, simultaneously the signal DOUT that produces of comparator LM258 transfers to the pin 5 of device by optocoupler, triode, controllable silicon, to detect output current; Pin 4 adopts pin for metal-oxide-semiconductor electric current, compared with the inductor current signal that the signal that this pin detects by device and device inside produce, determines when to turn off metal-oxide-semiconductor; Ubout is sent to pin 3 after 3 electric resistance partial pressures, and pin 2 is another input of internal multiplier, is the output of voltage error amplifier simultaneously, and pin 1 is the input of system feedback voltage; Voltage Feedback is sent to the pin 1 of device by the output TOUT of constant current constant voltage device by optocoupler, form the negative feedback loop of output voltage; Resistance R28 and electric capacity C18 is connected between the pin 1 of device and pin 2, for the formation of the compensating network of Voltage loop.
The effect that the present invention is useful: adopt the outdoor LED streetlamp power source that active PFC functional circuit designs, built-in complete EMC circuit and high efficiency lightning protection circuit, meet the requirement of safety and electromagnetic compatibility.Employing Voltage loop is fed back, pressure limiting constant current, and efficiency is high, and constant current is accurate, and wide ranges, achieves wide input, and pressure-stabilizing constant flow exports, and avoids the change of LED forward voltage and causes current variation, and constant electric current makes the brightness stability of LED simultaneously.Complete machine element is less, and circuit is simple.Power is 90W, and power factor reaches 0.95.The negative feedback of LED temperature can be increased according to user's request in constant current output, prevent LED temperature too high.
Accompanying drawing explanation
Fig. 1 is circuit overall block schematic illustration of the present invention;
Fig. 2 is the circuit diagram of DC/DC converter of the present invention;
Fig. 3 is constant-current constant-voltage circuit schematic diagram of the present invention;
Fig. 4 is comparator circuit schematic diagram of the present invention;
Fig. 5 is pfc circuit circuit diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
The present invention adopts the Switching Power Supply of isolating transformer, PFC control realization, exports the voltage of constant pressure and flow, driving LED street lamp.The general frame of circuit as shown in Figure 1.
The ability of LED antisurge is poor, and particularly anti-reflective is to voltage capability.The protection strengthening this respect is also very important.LED street lamp is contained in open air more will strengthen carrying out surge protection.Open the induction of getting rid of and being struck by lightning due to network load, can invade various surge from network system, some surge can cause the damage of LED.Therefore LED drive power should have the intrusion of suppression surge, the not impaired ability of protection LED.EMI filter circuit mainly prevents the humorous wave interference on electrical network from sealing in module, affects the normal work of control circuit.
The direct current that three-phase alternating current becomes pulsation after full-bridge rectification under the effect of filter capacitor and inductance, output dc voltage.Direct current is converted to the secondary output that high-frequency electrical pulses is pressed in transformer by main switch DC/AC circuit.The high-frequency impulse that transformer exports, through high-frequency rectification, LC filtering and EMI filtering, exports the DC power supply that LED street lamp needs.
Pwm control circuit adopts electric current and voltage double-loop control, to realize the restriction of adjustment to output voltage and output current.Feedback network adopts constant current constant voltage device TSM101 and comparator, and feedback signal gives PFC device L6561 by optocoupler.The power factor of module is made to reach 0.95 owing to employing PFC device.
The type of DC/DC converter has multiple, and in order to ensure Electrical Safety, present design is elected as isolated.Isolated DC/DC variation can be further subdivided into positive activation type, inverse-excitation type, semibridge system, full-bridge type and push-pull type etc. again.Wherein, semibridge system, full-bridge type and push-pull type are generally used for high-power output occasion, and its exciting circuit is complicated, implements more difficult; Positive activation type and reverse excitation circuit are then simple, but because inverse-excitation type more adapts to the vicissitudinous situation of input voltage than positive activation type, and PFC output voltage can have greatly changed in this power-supply system, therefore DC/DC conversion adopts flyback mode, is conducive to guaranteeing that output voltage stabilization is constant.
Inverse-excitation type switch power-supply is mainly used in the situation that power output is 5 ~ 150W.This power supply architecture is deduced by Buck-Boost structure and adds isolating transformer and obtain, as shown in Figure 2.In reverse exciting topological, by transformer as energy-storage travelling wave tube.During switching tube conducting, transformer storage power, load current is provided by output filter capacitor; When switching tube turns off, the energy of storage is sent to load and output filter capacitor by transformer, provides separately the energy consumed during load current with building-out capacitor.
In figure, T1 is high-frequency isolation transformer, and VQ1 is CMOS pliotron 17N80C3, VD7 and VD8 is transient supression diode, and VD6 is fast recovery diode, and VD5 is double diode, and C3, C4, C5 and C6 are electrolytic capacitor.Ubout is the pulsating direct current signal from rectifier bridge, and GD is the control signal from circuit of power factor correction.The lead-in wire l of a transformer and 2 composition winding, provides working power to PFC device, and a lead-in wire 11 and 12 composition winding, for constant current constant voltage device and comparator provide working power.
Feedback network circuit
1, constant-current constant-voltage circuit
The design uses constant-current constant-voltage controller part TSM101 regulation output voltage and current, makes it stable.Circuit as shown in Figure 3.By the control action of TSM101, ensure that power supply constant current (CC) and constant voltage (CV) work.In Fig. 3, Uout+ and Uout-is isolating transformer through the voltage of double diode and electrolytic capacitor filtering, then the output after inductance L 4 and capacitor filtering is Uout+ and Uout-, is the output voltage of this power module, is directly added in LED street lamp.The size of adjustable resistor RV1 and RV2 difference regulation output voltage and current.R10 and R11 is the resistance of 22m Ω, respectively to the voltage and current sample that power supply exports.The output TOUT of TMS101 delivers to the pin 5 of L6561 by circuit such as photoelectrical coupler, controllable silicon and triodes, realize current constant control by feedback circuit.Device pin 8 connects accessory power supply, and pin 4 connects transformer T1 secondary ground.
2, comparator circuit
Adopt comparator LM258, circuit as shown in Figure 4.Voltage signal VR+ and VR-at the sampling resistor two ends of output delivers to comparator LM258, by comparing with predeterminated voltage, produces voltage feedback signal DOUT.VF is the accessory power supply that transformer T1 vice-side winding produces.
Pfc circuit: the present invention adopts the control device L6561 of Active Power Factor Correction.Pfc circuit operation principle as shown in Figure 5.The pin 8 of L6561 is power input, is provided by the vice-side winding of transformer T1; Pin 7 is drive singal output pin, Direct driver metal-oxide-semiconductor VQ1; Pin 6 is that the ground of this pin and major loop connects together with reference to ground; Pin 5 is zero passage detection pin, for determining when conducting metal-oxide-semiconductor.The winding that the pin 1 of transformer T1 and pin 2 form, by resistance, inductive current zero cross signal is transferred to the pin 5 of this device, the signal DOUT that comparator LM258 produces simultaneously transfers to the pin 5 of device by optocoupler, triode, controllable silicon etc., to detect output current.Pin 4 adopts pin for metal-oxide-semiconductor electric current, compared with the inductor current signal that the signal that this pin detects by device and device inside produce, determines when to turn off metal-oxide-semiconductor.In Fig. 2, resistance R4 is as current sense resistor, and sampling metal-oxide-semiconductor electric current, this resistance one end is connected to systematically, and the other end is simultaneously at the source electrode of metal-oxide-semiconductor and the pin 4 of device.Pin 3 is an input of device inside multiplier, and this pin is connected with rectifier circuit output voltage, determines waveform and the phase place of input voltage, in order to the inductive current reference signal of generating device inside.In Fig. 5, Ubout is sent to pin 3 after 3 electric resistance partial pressures.Pin 2 is another input of internal multiplier, is the output of voltage error amplifier simultaneously, and pin 1 is the input of system feedback voltage.Voltage Feedback is sent to the pin 1 of device by the output TOUT of constant current constant voltage device by optocoupler, form the negative feedback loop of output voltage.Resistance R28 and electric capacity C18 is connected between the pin 1 of device and pin 2, for the formation of the compensating network of Voltage loop.
Experimental data
| Experimental quantities | Efficiency (%) | Power factor |
| 1 | 90.9 | 0.991 |
| 2 | 91.2 | 0.992 |
| 3 | 93.2 | 0.993 |
| 4 | 92.3 | 0.995 |
| 5 | 94.3 | 0.992 |
| 6 | 96.2 | 0.991 |
| 7 | 92.1 | 0.992 |
| 8 | 93.3 | 0.992 |
| 9 | 94.6 | 0.991 |
| 10 | 97.1 | 0.994 |
The present invention has less volume, can work long hours, easy heat radiation, low cost, electromagnetism interference, and excess temperature, overcurrent, short circuit, open-circuit-protection etc.PFC Switching Power Supply of the present invention is functional, reliable, economical and practical and efficiency is high, in LED street lamp use procedure, obtain satisfied effect.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (4)
1. a drive circuit for high-power LED street, it is characterized in that: three-phase alternating current is connected with EMI filter circuit by Anti-surging module, the direct current that three-phase alternating current becomes pulsation after full-bridge rectification is under the effect of filter capacitor and inductance, output dc voltage, direct current is converted to the secondary output that high-frequency electrical pulses is pressed in transformer by main switch DC/AC circuit, the high-frequency impulse that transformer exports is through high-frequency rectification, LC filtering and EMI filtering, export the DC power supply that LED street lamp needs, pwm control circuit adopts electric current and voltage double-loop control, to realize the adjustment of output voltage and the restriction of output current, feedback network adopts constant current constant voltage device TSM101 and comparator, constant current constant voltage device TSM101 regulation output voltage and current forms constant-current constant-voltage circuit, feedback signal gives PFC device L6561 by optocoupler.
2. drive circuit for high-power LED street according to claim 1, is characterized in that: the employing of DC/DC circuit isolation inverse-excitation type, inverse-excitation type switch power-supply by transformer as energy-storage travelling wave tube; During switching tube conducting, transformer storage power, load current is provided by output filter capacitor; When switching tube turns off, the energy of storage is sent to load and output filter capacitor by transformer, provides separately the energy consumed during load current with building-out capacitor.
3. drive circuit for high-power LED street according to claim 1, it is characterized in that: in constant-current constant-voltage circuit: Uout+ and Uout-is isolating transformer through the voltage of double diode and electrolytic capacitor filtering, output again after inductance L 4 and capacitor filtering is Uout+ and Uout-, for the output voltage of this power module, be directly added in LED street lamp; The size of adjustable resistor RV1 and RV2 difference regulation output voltage and current, R10 and R11 is the resistance of 22m Ω, respectively to the voltage and current sample that power supply exports, the output TOUT of TMS101 delivers to the pin 5 of PFC device L6561 by circuit such as photoelectrical coupler, controllable silicon and triodes, current constant control is realized by feedback circuit, device pin 8 connects accessory power supply, and pin 4 connects transformer T1 secondary ground.
4. drive circuit for high-power LED street according to claim 1, is characterized in that: in PFC device L6561, and pin 8 is power input, is provided by the vice-side winding of transformer T1; Pin 7 is drive singal output pin, Direct driver metal-oxide-semiconductor VQ1; Pin 6 is that the ground of this pin and major loop connects together with reference to ground; Pin 5 is zero passage detection pin, for determining when conducting metal-oxide-semiconductor; The winding that the pin 1 of transformer T1 and pin 2 form, by resistance, inductive current zero cross signal is transferred to the pin 5 of this device, simultaneously the signal DOUT that produces of comparator LM258 transfers to the pin 5 of device by optocoupler, triode, controllable silicon, to detect output current; Pin 4 adopts pin for metal-oxide-semiconductor electric current, compared with the inductor current signal that the signal that this pin detects by device and device inside produce, determines when to turn off metal-oxide-semiconductor; Ubout is sent to pin 3 after 3 electric resistance partial pressures, and pin 2 is another input of internal multiplier, is the output of voltage error amplifier simultaneously, and pin 1 is the input of system feedback voltage; Voltage Feedback is sent to the pin 1 of device by the output TOUT of constant current constant voltage device by optocoupler, form the negative feedback loop of output voltage; Resistance R28 and electric capacity C18 is connected between the pin 1 of device and pin 2, for the formation of the compensating network of Voltage loop.
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| CN201510982501.9A CN105491713A (en) | 2015-12-23 | 2015-12-23 | High-power LED street lamp drive circuit |
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| CN201510982501.9A CN105491713A (en) | 2015-12-23 | 2015-12-23 | High-power LED street lamp drive circuit |
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| CN201510982501.9A Pending CN105491713A (en) | 2015-12-23 | 2015-12-23 | High-power LED street lamp drive circuit |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105792444A (en) * | 2016-05-06 | 2016-07-20 | 深圳市华星光电技术有限公司 | Led drive circuit |
| CN106658845A (en) * | 2016-12-20 | 2017-05-10 | 深圳市福瑞新科技有限公司 | Intelligent and fully compatible LED driving power supply circuit |
| CN107547001A (en) * | 2017-08-16 | 2018-01-05 | 北京无线电测量研究所 | A kind of thyratron filament supply and its adjusting method |
| CN107872149A (en) * | 2016-09-23 | 2018-04-03 | 江苏科谷电子有限公司 | A kind of High Power Factor, output ripple and low, the LED power of high performance-price ratio |
| CN108898989A (en) * | 2018-07-11 | 2018-11-27 | 杭州视芯科技有限公司 | LED display and its driving method |
| CN110493922A (en) * | 2019-08-28 | 2019-11-22 | 厦门亚锝电子科技有限公司 | A kind of LED drive circuit of the low ripple without stroboscopic |
| CN111194115A (en) * | 2019-12-30 | 2020-05-22 | 陕西兴安润通电气化有限公司 | Railway tunnel lighting lamp distributed control method based on wireless Internet of things technology |
| CN111988890A (en) * | 2020-10-26 | 2020-11-24 | 南京容测检测技术有限公司 | Light emitting diode lighting equipment power supply for electromagnetic compatibility test |
| CN112188677A (en) * | 2020-11-02 | 2021-01-05 | 东莞市擎洲光电科技有限公司 | Drive power supply circuit with high-power and high-current output |
| CN114007306A (en) * | 2021-11-25 | 2022-02-01 | 鸣志电器(太仓)有限公司 | Nuclear radiation resistant LED driver circuit |
| CN114501729A (en) * | 2022-03-04 | 2022-05-13 | 深圳市金永信科技有限公司 | LED driving power circuit with high power and high alternating voltage |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105792444A (en) * | 2016-05-06 | 2016-07-20 | 深圳市华星光电技术有限公司 | Led drive circuit |
| CN107872149A (en) * | 2016-09-23 | 2018-04-03 | 江苏科谷电子有限公司 | A kind of High Power Factor, output ripple and low, the LED power of high performance-price ratio |
| CN106658845A (en) * | 2016-12-20 | 2017-05-10 | 深圳市福瑞新科技有限公司 | Intelligent and fully compatible LED driving power supply circuit |
| CN106658845B (en) * | 2016-12-20 | 2018-07-03 | 深圳市福瑞新科技有限公司 | The full compatible with LED driving power circuit of intelligence |
| CN107547001A (en) * | 2017-08-16 | 2018-01-05 | 北京无线电测量研究所 | A kind of thyratron filament supply and its adjusting method |
| CN108898989A (en) * | 2018-07-11 | 2018-11-27 | 杭州视芯科技有限公司 | LED display and its driving method |
| CN110493922A (en) * | 2019-08-28 | 2019-11-22 | 厦门亚锝电子科技有限公司 | A kind of LED drive circuit of the low ripple without stroboscopic |
| CN111194115A (en) * | 2019-12-30 | 2020-05-22 | 陕西兴安润通电气化有限公司 | Railway tunnel lighting lamp distributed control method based on wireless Internet of things technology |
| CN111194115B (en) * | 2019-12-30 | 2022-04-15 | 陕西兴安润通电气化有限公司 | Railway tunnel lighting lamp distributed control method based on wireless Internet of things technology |
| CN111988890A (en) * | 2020-10-26 | 2020-11-24 | 南京容测检测技术有限公司 | Light emitting diode lighting equipment power supply for electromagnetic compatibility test |
| CN112188677A (en) * | 2020-11-02 | 2021-01-05 | 东莞市擎洲光电科技有限公司 | Drive power supply circuit with high-power and high-current output |
| CN114007306A (en) * | 2021-11-25 | 2022-02-01 | 鸣志电器(太仓)有限公司 | Nuclear radiation resistant LED driver circuit |
| CN114501729A (en) * | 2022-03-04 | 2022-05-13 | 深圳市金永信科技有限公司 | LED driving power circuit with high power and high alternating voltage |
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Application publication date: 20160413 |