CN102917511A - Anti-lightning type LED (Light Emitting Diode) power supply - Google Patents

Anti-lightning type LED (Light Emitting Diode) power supply Download PDF

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Publication number
CN102917511A
CN102917511A CN2012104387654A CN201210438765A CN102917511A CN 102917511 A CN102917511 A CN 102917511A CN 2012104387654 A CN2012104387654 A CN 2012104387654A CN 201210438765 A CN201210438765 A CN 201210438765A CN 102917511 A CN102917511 A CN 102917511A
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China
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resistance
unit
output
anode
input
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CN2012104387654A
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Chinese (zh)
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何俊兴
张良保
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HUANGSHAN QIANLONG ELECTRONIC CO Ltd
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HUANGSHAN QIANLONG ELECTRONIC CO Ltd
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Priority to CN2012104387654A priority Critical patent/CN102917511A/en
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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

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Abstract

An anti-lightning type LED (Light Emitting Diode) power supply comprises an input power supply unit (1), a power inversion unit (3), an output unit (4), a voltage and current feedback unit (5) and a control unit (6), and further comprises a surge residual voltage suppression unit (2), wherein an input end of the input power supply unit (1) is connected with an alternating-current low-frequency power supply network, an output end of the input power supply unit is connected with an input end of the surge residual voltage suppression unit (2), an output end of the surge residual voltage suppression unit (2) is connected with the power inversion unit (3), the power inversion unit (3) is connected to the output unit (4) through a voltage transformer, the voltage and current feedback unit (5) is connected with the output unit (4), output voltage and current are fed back to the control unit (6) through an photoelectric coupler, and the control unit (6) is connected to the power inversion unit (3).The anti-lightning type LED power supply has the advantages of suitability for being matched with outdoor LED illuminating lamps, good anti-lightning effect, high power factor, simple structure, low cost, etc.

Description

Anti-lightning strike type LED power supply
Technical field
The present invention relates to a kind of LED power supply, especially a kind of outdoor LED power supply with High Power Factor and lightening surge preventing.
Background technology
Led light source is widely used in the fields such as urban afforestation illumination and indoor and outdoor lighting owing to possess luminance height, energy-efficient, the characteristic such as the life-span is long, low pressure is controlled.Outdoor lighting is for safety and reliability consideration, the traditional circuit design, obtain higher power factor and have again certain anti-lightning carrying out surge protection simultaneously, can realize by increase APFC and power conversion circuit in electronic driver, the method of this two-layer configuration will make circuit very complicated, cost improves, and the energy of power device loss will increase on the contrary, is unfavorable for the realization of LED Product Green energy conservation object.Through retrieval and market survey, find the combinational circuit by single-stage PFC (power factor correction) and lightning-protection module, realize that lightning protection and related data and the material object of the LED power supply that improves power factor appear on the market.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of circuit structure simple, the anti-lightning strike type LED power supply that cost is low, energy consumption is less for the deficiency of prior art existence.
Solving the problems of the technologies described above the technical scheme that adopts is: this anti-lightning strike type LED power supply comprises: the input power supply unit, and the power conversion unit, output unit, the feedback of voltage and current unit, control unit also has additional the surge residual voltage and suppresses the unit;
Wherein input the power supply unit input and connect interchange low-frequency power network, output connects the surge residual voltage and suppresses the unit input, and the surge residual voltage suppresses the unit output and connects the power conversion unit, and the power conversion unit passes through Transformer Winding T 1-A, T 1-CConnect output unit, output voltage current feedback unit connects output unit and feeds back to control unit by photoelectrical coupler, and control unit connects the power conversion unit.
Described input power supply unit comprises fuse F 1And piezo-resistance VR 1, fuse F 1A termination receive the electrical network alternating current input power supplying, output connects piezo-resistance VR 1, capacitor C X 2With common mode inductance L 2An end, piezo-resistance VR 1, capacitor C X 2With common mode inductance L 2The other end connect the other end of alternating current input power supplying, common mode inductance L 2Output and thermistor RT 1An end connect, the other end is connected with respectively bleeder resistance R 13And R 14, capacitor C X 1With rectifier bridge B 1Input, rectifier bridge B 1Output filter capacitor C in parallel 3
Described surge residual voltage suppresses the unit and comprises inductance L 1, resistance R 1, diode D 1With D 5, bleeder resistance R 2With R 3, electrochemical capacitor C 11Inductance L wherein 1Parallel resistance R 1One termination rectifier bridge B 1Anode output, the other end and diode D 1Negative electrode is connected to the primary winding T of power conversion unit 1-AAnode; Diode D 5Negative electrode connects the output of rectifier bridge anode, diode D 5And D 1Anode, bleeder resistance R 3Be connected to electrochemical capacitor C 11Anode, bleeder resistance R 3The other end and resistance R 2Be connected in series to primary winding T 1-AAnode.
Described power conversion unit, wherein capacitor C 4, primary winding T 1-AAnode is connected to the output that the surge residual voltage suppresses the unit, voltage stabilizing didoe D 2, capacitor C 1, discharge resistance R 7And be connected to fast recovery diode D 3The peak absorbing loop that the sun level forms is parallel to primary winding T 1-ATwo ends; Primary winding T 1-ANegative terminal and power switch pipe Q 1Drain electrode link to each other power switch pipe Q 1Grid be connected power switch pipe Q with the driving signal of control unit 1Source electrode and sample resistance R CS1Resistance R with control unit 35Connect.
Described output unit, its mesohigh ceramic disc capacitor C 2With current-limiting resistance R 9Be parallel to recovery diode D 4Two ends, D 4Negative electrode meets transformer secondary output winding T 1-CAnode, anode and filter capacitor C 13, C 16Positive pole connect the anode of LED lamp load, resistance R 12Be parallel to capacitor C 13Two ends, transformer secondary output winding T 1-CNegative pole series winding sample resistance R CS2, the resistance R of the other end and feedback of voltage and current unit 31The negative terminal that connects the LED lamp load.
Described feedback of voltage and current unit comprises operational amplifier U 2AWith U 2B, voltage reference chip U 3, photoelectrical coupler U 4, the auxiliary winding T of transformer secondary output 1-DAnd peripheral resistance and electric capacity; Transformer secondary output is assisted winding T 1-DAnode connects diode D 8Negative electrode, diode D 8Anode and current-limiting resistance R 26, filter capacitor C 12With C 15Be connected to operational amplifier U 2AWith U 2BWith voltage reference chip U 3Feeder ear; Resistance R 11With R 45An end is connected to the positive pole of output unit behind the series winding, and the other end is connected to operational amplifier U 2BInverting input, resistance R 31One end is connected to the output negative pole of output unit, and the other end is connected to operational amplifier U 2AInverting input; Voltage reference chip U 3Input and reference edge concatenation operation amplifier U 2BNormal phase input end, and pass through resistance R 42With R 41Receive operational amplifier U after the series winding dividing potential drop 2ANormal phase input end; Operational amplifier U 2AWith U 2BOutput respectively by diode D 9And D 1Negative electrode be connected to photoelectrical coupler U 4Anode.
The pulse frequency adjuster U with multiplier in the described control unit 1The annexation of each pin is:
Error amplifier inverting input 1 pin passes through resistance R 33Connect photoelectrical coupler U 4Emitter;
Error amplifier reversed-phase output 2 pin, wherein resistance R 17, capacitor C 5Rear and the R of series connection 16Parallel connection, a termination error amplifier reversed-phase output 2 pin, another termination error amplifier inverting input 1 pin;
Multiplier input 3 pin pass through resistance R 18, R 19Connection transformer primary coil T 1-AAnode, resistance R 20And capacitor C 6Ground connection;
Control comparator input terminal 4 pin pass through resistance R 35Connect power switch pipe Q 1Source electrode;
Zero current detection input 5 pin pass through resistance R 37Connect the elementary auxiliary winding T of depressor 1-BAnode;
Current reflux end ground connection with the pulse frequency modulator of multiplier;
Door drive output 7 pin pass through resistance R 23, R 24With diode D 7Connect power switch pipe Q 1Grid;
Supply power voltage end 8 pin pass through resistance R 5, R 6Connect electrochemical capacitor C 17Anode and ceramic disc capacitor C 7Primary is assisted winding T 1-BPositive terminating diode D 6Negative electrode, D 6Anode series limiting resistor R 22Connect supply power voltage end 8 pin.
The invention has the beneficial effects as follows: owing to use single-stage power factor (PF) emphasizer circuit to improve power factor, energy-conservation, circuit structure is simple, reduced cost; Be provided with the surge residual voltage and suppress circuit unit, the anti-lightning surge capacity of circuit has obtained very large lifting, has improved the reliability of circuit.
Description of drawings
Fig. 1 is the circuit block diagram of this anti-lightning strike type LED power supply;
Fig. 2 is the circuit theory diagrams of this anti-lightning strike type LED power supply.
Embodiment
The present invention is described in detail below in conjunction with embodiment and with reference to accompanying drawing:
As shown in Figure 1, this anti-lightning strike type LED power supply comprises input power supply unit 1, and the surge residual voltage suppresses unit 2, power conversion unit 3, output unit 4, feedback of voltage and current unit 5, control unit 6;
Input power supply unit 1 comprises piezo-resistance VR 1The input surge voltage-suppressing circuit that consists of plays the effect of voltage clamping when electrical network is subject to the surge voltage impact, with peak voltage decay, simultaneously common mode inductance L 2With thermistor RT 1Play the effect of surge current suppression, common mode inductance L 2With capacitor C X 1, CX 2Form π type filter circuit, effectively suppress harmonic wave and noise, improve EMC effect, filtering common mode interference.Current rectifying and wave filtering circuit is used for low frequency ac and is converted to direct current.
The surge residual voltage suppresses unit 2 and comprises inductance L 1, resistance R 1, diode D 1With D 5, bleeder resistance R 2With R 3With electrochemical capacitor C 11When input receives stronger surge voltage energy, the described input power supply unit of front end is decayed to surge voltage, but when energy is larger, the front-end circuit portion of energy that only decayed, still have stronger residual voltage energy by input power supply unit 1, be serially connected with the inductance L on the main circuit this moment 1Can produce opposite electromotive force at input when running into peak voltage, make spike not pass through smoothly this element, the energy of surging can select the path of low-resistance to go to release, and can pass through diode D this moment 5To electrochemical capacitor C 11Charge electrochemical capacitor C 11Be a larger energy-storage travelling wave tube, peak voltage can be dragged down, simultaneously energy is stored into first electric capacity and makes the spike energy late-class circuit of can not releasing moment, cause device electric understrressing and with component wear; Select suitable electrochemical capacitor parameter just spike energy can be suppressed in the less scope, thereby play the effect of protection late-class circuit; After the peak voltage decay, electrochemical capacitor C 11By bleeder resistance R 2, R 3Slowly discharge arranges resistance R 2, R 3Parameter controlled discharge electric current a smaller value, make spike in the past after on late-class circuit without impact; During stabilized input voltage, electrochemical capacitor C 11Current potential identical with the current potential of input power supply unit output, do not discharge and recharge, thereby both guaranteed protection to lightning surge, again not with large capacitor C 11And link in the circuit, affect power factor (PF) calibration (PFC) circuit of rear class.
Power conversion unit 3 comprises power switch pipe Q 1, the elementary feedback winding of flyback transformer T 1-A, elementary peak absorbing circuit, wherein power switch pipe Q 1The direct current that to input power supply unit together and provide with flyback transformer converts the high frequency output pulse to.
Output unit 4 is used for that rectifying and wave-filtering is carried out in the high frequency output pulse of power conversion unit 3 outputs to be processed, to obtain the required stable direct current output of led light source.
Feedback of voltage and current unit 5 comprises operational amplifier U 2AWith U 2B, voltage reference chip U 3, photoelectrical coupler U 4, the auxiliary winding of transformer secondary output and peripheral biasing resistor and electric capacity;
Current signal passes through resistance R CS2Sampling obtains, and passes through resistance R again 31Concatenation operation amplifier U 2AInverting input, voltage reference chip U 3The reference voltage that provides is again through resistance R 41, R 42After the dividing potential drop, be connected to operational amplifier U 2ANormal phase input end, compare with current signal and to obtain current error signal, this error signal is by operational amplifier U 2AOutput and diode D 9Anode is connected, diode D 9Negative electrode and photoelectrical coupler U 4Anode links to each other, thereby the error signal of electric current is fed back to control unit 6 by photoelectrical coupler.
Voltage signal passes through resistance R by output cathode 11, R 45After the dividing potential drop, be connected to operational amplifier U 2BInverting input, voltage reference chip U 3The reference voltage that provides is connected to operational amplifier U 2BNormal phase input end, compare with voltage signal and to obtain current error signal, this error signal is by operational amplifier U 2BOutput and diode D 9Anode is connected, diode D9Negative electrode and photoelectrical coupler U 4Emitter link to each other, thereby the error signal of voltage is fed back to control unit 6 by photoelectrical coupler.
Control unit 6 comprises the pulse frequency adjuster U with multiplier 1, error amplifier inverting input 1 pin passes through resistance R 33Connect photoelectrical coupler U 4Emitter, be used for the input of described output voltage, current error signal, compare by accepting error signal, to reach the purpose of control output; Error amplifier reversed-phase output 2 pin, wherein resistance R 17, capacitor C 5Rear and the R of series connection 16Parallel connection, a termination error amplifier reversed-phase output 2 pin, another termination error amplifier inverting input 1 pin is by adjusting resistance R 17, R 16And capacitor C 5Parametric compensation signal input signal; Multiplier input 3 pin pass through resistance R 18, R 19Connection transformer primary coil T 1-AAnode is by the input acquisition input voltage signal of cut-off stream voltage; Control comparator input terminal 4 pin pass through resistance R 35Receive power switch pipe Q 1Source electrode, be used for the input of described primary current error signal; Zero current detection input 5 pin pass through resistance R 37The elementary auxiliary winding T of connection transformer 1-B justEnd is used for described input voltage and crosses the shape tracking; Door drive output 7 pin pass through resistance R 23, R 24With diode D 7, connect power switch pipe Q 1Grid, controller U 1By comparing input voltage waveform and primary current waveform generation output control signal, output to switching tube Q by the gate-drive end 1, control Q 1Break-make, make input current waveform follow input voltage waveform, to reach the purpose that improves power factor (PF).

Claims (1)

1. an anti-lightning strike type LED power supply comprises input power supply unit (1), power conversion unit (3), output unit (4), feedback of voltage and current unit (5), control unit (6) is characterized in that also having additional the surge residual voltage and suppresses unit (2);
Wherein input power supply unit (1) input and connect interchange low-frequency power network, output connects the surge residual voltage and suppresses unit (2) input, the surge residual voltage suppresses unit (2) output and connects power conversion unit (3), and power conversion unit (3) are by Transformer Winding T 1-A, T 1-CConnect output unit (4), output voltage current feedback unit (5) connects output unit (4) and feeds back to control unit (6) by photoelectrical coupler, and control unit (6) connects Power Exchange unit (3);
Described input power supply unit (1) comprises fuse F 1And piezo-resistance VR 1, fuse F 1A termination receive the electrical network alternating current input power supplying, output connects piezo-resistance VR 1, capacitor C X 2With common mode inductance L 2An end, piezo-resistance VR 1, capacitor C X 2With common mode inductance L 2The other end connect the other end of alternating current input power supplying, common mode inductance L 2Output and thermistor RT 1An end connect, the other end is connected with respectively bleeder resistance R 13And R 14, capacitor C X 1With rectifier bridge B 1Input, rectifier bridge B 1Output filter capacitor C in parallel 3
Described surge residual voltage suppresses unit (2) and comprises inductance L 1, resistance R 1, diode D 1With D 5, bleeder resistance R 2With R 3, electrochemical capacitor C 11Inductance L wherein 1Parallel resistance R 1One termination rectifier bridge B 1Anode output, the other end and diode D 1Negative electrode is connected to the primary winding T of power conversion unit (3) 1-AAnode; Diode D 5It is defeated by, diode D that negative electrode connects the rectifier bridge anode 5And D 1Anode, bleeder resistance R 3Be connected to electrochemical capacitor C 11Anode, bleeder resistance R 3The other end and resistance R 2Be connected in series to primary winding T 1-AAnode;
Described power conversion unit (3), wherein capacitor C 4, primary winding T 1-AAnode is connected to the output that the surge residual voltage suppresses unit (2), voltage stabilizing didoe D 2, capacitor C 1, discharge resistance R 7And be connected to fast recovery diode D 3The peak absorbing loop that the sun level forms is parallel to primary winding T 1-ATwo ends; Primary winding T 1-ANegative terminal and power switch pipe Q 1Drain electrode link to each other power switch pipe Q 1Grid be connected power switch pipe Q with the driving signal of control unit (6) 1Source electrode and sample resistance R CS1And the resistance R of control unit (6) 35Connect;
Described output unit (4), its mesohigh ceramic disc capacitor C 2With current-limiting resistance R 9Be parallel to recovery diode D 4Two ends, D 4Negative electrode meets transformer secondary output winding T 1-CAnode, anode and filter capacitor C 13, C 16Positive pole connect the anode of LED lamp load, resistance R 12Be parallel to capacitor C 13Two ends, transformer secondary output winding T 1-CNegative pole series winding sample resistance R CS2, R CS2The other end and the resistance R of feedback of voltage and current unit (5) 31The negative terminal that connects the LED lamp load;
Described feedback of voltage and current unit (5) comprises operational amplifier U 2AWith U 2B, voltage reference chip U 3, photoelectrical coupler U 4, the auxiliary winding T of transformer secondary output 1-DAnd peripheral resistance and electric capacity; Transformer secondary output is assisted winding T 1-DAnode connects diode D 8Negative electrode, diode D 8Anode and current-limiting resistance R 26, filter capacitor C 12With C 15Be connected to operational amplifier U 2AWith U 2BWith voltage reference chip U 3Feeder ear; Resistance R 11With R 45An end is connected to the positive pole of output unit (4) behind the series winding, and the other end is connected to operational amplifier U 2BInverting input, resistance R 31One end is connected to the output negative pole of output unit (4), and the other end is connected to operational amplifier U 2AInverting input; Voltage reference chip U 3Input and reference edge concatenation operation amplifier U 2BNormal phase input end, and pass through resistance R 42With R 41Receive operational amplifier U after the series winding dividing potential drop 2ANormal phase input end; Operational amplifier U 2AWith U 2BOutput respectively by diode D 9And D 1Negative electrode be connected to photoelectrical coupler U 4Anode;
The pulse frequency adjuster U with multiplier in the described control unit (6) 1The annexation of each pin is:
Error amplifier inverting input 1 pin passes through resistance R 33Connect photoelectrical coupler U 4Emitter;
Error amplifier reversed-phase output 2 pin, wherein resistance R 17, capacitor C 5Rear and the R of series connection 16Parallel connection, a termination error amplifier reversed-phase output 2 pin, another termination error amplifier inverting input 1 pin;
Multiplier input 3 pin pass through resistance R 18, R 19Connection transformer primary coil T 1-AAnode, resistance R 20And capacitor C 6Ground connection;
Control comparator input terminal 4 pin pass through resistance R 35Connect power switch pipe Q 1Source electrode;
Zero current detection input 5 pin pass through resistance R 37Connect the elementary auxiliary winding T of depressor 1-BAnode;
Current reflux end ground connection with the pulse frequency modulator of multiplier;
Door drive output 7 pin pass through resistance R 23, R 24With diode D 7Connect power switch pipe Q 1Grid;
Supply power voltage end 8 pin pass through resistance R 5, R 6Connect electrochemical capacitor C 17Anode and ceramic disc capacitor C 7Primary is assisted winding T 1-BPositive terminating diode D 6Negative electrode, D 6Anode series limiting resistor R 22Connect supply power voltage end 8 pin.
CN2012104387654A 2012-11-06 2012-11-06 Anti-lightning type LED (Light Emitting Diode) power supply Pending CN102917511A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014190837A1 (en) * 2013-05-30 2014-12-04 Liao Shunan Power supply apparatus for low-temperature led lighting
CN104486893A (en) * 2015-01-06 2015-04-01 宁波江北华瑞电子有限公司 Intelligent LED constant-current control power supply device
CN104640314A (en) * 2015-01-06 2015-05-20 宁波江北华瑞电子有限公司 High-reliability LED (Light Emitting Diode) drive circuit
CN104640313A (en) * 2015-01-06 2015-05-20 宁波江北华瑞电子有限公司 High-power energy-saving LED (Light Emitting Diode) driving power supply device
CN105246215A (en) * 2015-11-03 2016-01-13 佛山市南海区联合广东新光源产业创新中心 LED driving power supply with bluetooth remote control
CN105792431A (en) * 2016-04-14 2016-07-20 成都恒稳光电科技有限公司 Led lamp energy-saving power supply
CN106026062A (en) * 2016-06-21 2016-10-12 贵州电网有限责任公司电力科学研究院 Electricity information acquisition terminal power supply and metering unit protection circuit
CN108539969A (en) * 2018-04-26 2018-09-14 王俊 A kind of shock resistance protective loop of use in driving power
CN109526102A (en) * 2018-11-29 2019-03-26 安徽世林照明股份有限公司 The locked protection circuit of antisurge with auxiliary power supply low standby power loss
CN110225628A (en) * 2019-07-19 2019-09-10 无锡奥利杰科技有限公司 A kind of Linear Driving is to publicly high voltage protective application circuit
CN110572019A (en) * 2018-06-06 2019-12-13 青岛鼎信通讯股份有限公司 wide-range, high-reliability and low-EMI flyback switching power supply
CN111901928A (en) * 2020-01-03 2020-11-06 杭州市中策职业学校 Subway LED lamp driving power supply capable of correcting power factor and power adjusting method
CN112911764A (en) * 2021-02-02 2021-06-04 深圳市安普信达软件技术服务有限公司 LED drive power supply anti-surge system

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CN201312397Y (en) * 2008-12-08 2009-09-16 河源市粤兴实业有限公司 Led street lamp circuit
CN201639281U (en) * 2010-03-30 2010-11-17 江苏指南针导航通信技术有限公司 Current-limiting type lightning induction surge suppressor
US20120075895A1 (en) * 2010-09-27 2012-03-29 Cooper Technologies Company Universal-Voltage Discrete Input Circuit

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CN201312397Y (en) * 2008-12-08 2009-09-16 河源市粤兴实业有限公司 Led street lamp circuit
CN201639281U (en) * 2010-03-30 2010-11-17 江苏指南针导航通信技术有限公司 Current-limiting type lightning induction surge suppressor
US20120075895A1 (en) * 2010-09-27 2012-03-29 Cooper Technologies Company Universal-Voltage Discrete Input Circuit

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014190837A1 (en) * 2013-05-30 2014-12-04 Liao Shunan Power supply apparatus for low-temperature led lighting
CN104486893A (en) * 2015-01-06 2015-04-01 宁波江北华瑞电子有限公司 Intelligent LED constant-current control power supply device
CN104640314A (en) * 2015-01-06 2015-05-20 宁波江北华瑞电子有限公司 High-reliability LED (Light Emitting Diode) drive circuit
CN104640313A (en) * 2015-01-06 2015-05-20 宁波江北华瑞电子有限公司 High-power energy-saving LED (Light Emitting Diode) driving power supply device
CN105246215A (en) * 2015-11-03 2016-01-13 佛山市南海区联合广东新光源产业创新中心 LED driving power supply with bluetooth remote control
CN105792431A (en) * 2016-04-14 2016-07-20 成都恒稳光电科技有限公司 Led lamp energy-saving power supply
CN106026062A (en) * 2016-06-21 2016-10-12 贵州电网有限责任公司电力科学研究院 Electricity information acquisition terminal power supply and metering unit protection circuit
CN108539969A (en) * 2018-04-26 2018-09-14 王俊 A kind of shock resistance protective loop of use in driving power
CN108539969B (en) * 2018-04-26 2024-04-16 王俊 Impact-resistant protection circuit used on driving power supply
CN110572019A (en) * 2018-06-06 2019-12-13 青岛鼎信通讯股份有限公司 wide-range, high-reliability and low-EMI flyback switching power supply
CN109526102A (en) * 2018-11-29 2019-03-26 安徽世林照明股份有限公司 The locked protection circuit of antisurge with auxiliary power supply low standby power loss
CN110225628B (en) * 2019-07-19 2021-04-27 无锡奥利杰科技有限公司 Linear drive is to public ground high voltage protection application circuit
CN110225628A (en) * 2019-07-19 2019-09-10 无锡奥利杰科技有限公司 A kind of Linear Driving is to publicly high voltage protective application circuit
CN111901928A (en) * 2020-01-03 2020-11-06 杭州市中策职业学校 Subway LED lamp driving power supply capable of correcting power factor and power adjusting method
CN111901928B (en) * 2020-01-03 2022-06-10 杭州市中策职业学校 Subway LED lamp driving power supply capable of correcting power factor and power adjusting method
CN112911764A (en) * 2021-02-02 2021-06-04 深圳市安普信达软件技术服务有限公司 LED drive power supply anti-surge system

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Application publication date: 20130206