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WO2018177389A1 - Système de partage de courant à tension constante de del - Google Patents

Système de partage de courant à tension constante de del Download PDF

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Publication number
WO2018177389A1
WO2018177389A1 PCT/CN2018/081237 CN2018081237W WO2018177389A1 WO 2018177389 A1 WO2018177389 A1 WO 2018177389A1 CN 2018081237 W CN2018081237 W CN 2018081237W WO 2018177389 A1 WO2018177389 A1 WO 2018177389A1
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WO
WIPO (PCT)
Prior art keywords
resistor
current sharing
voltage
module
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/081237
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English (en)
Chinese (zh)
Inventor
林耀烽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridonic GmbH and Co KG
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Tridonic GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Publication of WO2018177389A1 publication Critical patent/WO2018177389A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for DC mains or DC distribution networks
    • H02J1/10—Parallel operation of DC sources
    • 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
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/06—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/08—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • 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]

Definitions

  • the invention belongs to the field of LEDs, and in particular relates to an LED constant voltage current sharing system.
  • the high-power LED system requires several or more power modules to supply power. All the power modules share the load, which requires the power module to be perfect. Stable current sharing circuit.
  • the parallel power supply of the LED load module utilizes the load change rate of the power supply itself and the DC-blocking diode to achieve natural current sharing, without complicated current sharing circuit, and only needs to be outputted in each power module.
  • Adding a DC blocking diode at the end can be achieved, but the current sharing effect is poor due to its own load change rate and the natural current sharing of the DC blocking diode.
  • the prior art has no current sharing circuit, resulting in a problem of poor current sharing effect.
  • the invention provides an LED constant voltage current sharing system, which aims to solve the problem that the prior art has no current sharing circuit, thereby causing poor current sharing effect.
  • the present invention is achieved by an LED constant voltage current sharing system including a plurality of current sharing modules, a plurality of DC power sources, and an LED load module;
  • the plurality of current sharing modules are connected to the plurality of DC power sources in a one-to-one correspondence, wherein the current sampling end and the feedback output end of each current sharing module are respectively connected to the sampling end and the feedback input end of the corresponding DC power supply.
  • the equalization voltage ends of the plurality of current sharing modules are connected to the current sharing bus, and the positive output ends of the plurality of DC power sources are connected to the first end of the LED load module, and the negative output terminals of the plurality of DC power sources And the second end of the LED load module is connected to the power ground;
  • Each of the current sharing modules detects an output voltage of a corresponding DC power source, and generates an equalization voltage according to the output voltage, and the plurality of equalization voltages generated by the plurality of current sharing modules are output to the current sharing bus to generate A bus voltage, each current sharing module generating a feedback signal according to the current sharing bus voltage to adjust an output voltage of its corresponding DC power supply.
  • the LED constant voltage current sharing system includes a plurality of current sharing modules, a plurality of DC power sources, and an LED load module; and a plurality of current sharing modules and a plurality of The DC power sources are connected one by one, each current sharing module detects the output voltage of the corresponding DC power source, and generates an equalized voltage according to the output voltage, and the plurality of equalized voltages generated by the plurality of current sharing modules are output to the current sharing bus to generate a current sharing.
  • the bus voltage, each current sharing module generates a feedback signal according to the current sharing bus voltage to adjust the output voltage of the corresponding DC power supply, so that the current sharing effect of the parallel power supply of the LED load module can be improved.
  • FIG. 1 is a block diagram of a prior art LED constant voltage current sharing system
  • FIG. 2 is a block diagram of a module for constant voltage equalization of an LED according to an embodiment of the present invention
  • FIG. 3 is a schematic circuit structural diagram of a current sharing module of an LED constant voltage current sharing system according to an embodiment of the present invention
  • FIG. 4 is another schematic circuit structure diagram of a current sharing module for an LED constant voltage current sharing system according to an embodiment of the present invention.
  • FIG. 5 is a block diagram of a current sharing module of an LED constant voltage current sharing system according to an embodiment of the present invention.
  • FIG. 6 is a schematic circuit structural diagram of the LED constant voltage current sharing system current sharing module provided in FIG. 5.
  • FIG. 6 is a schematic circuit structural diagram of the LED constant voltage current sharing system current sharing module provided in FIG. 5.
  • FIG. 2 shows a module structure of an LED constant voltage current sharing system according to an embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, which are described in detail as follows:
  • An LED constant voltage current sharing system includes a plurality of current sharing modules 01i, a plurality of DC power sources 02i, and an LED load module 03.
  • the current sharing module 01i is connected to the plurality of DC power sources 02i in one-to-one correspondence, wherein the current sampling end and the feedback output end of each current sharing module 01i are respectively connected to the sampling end and the feedback input end of the corresponding DC power supply 02i.
  • the equalized voltage terminals of the plurality of current sharing modules 01i are connected to the current sharing bus, and the positive output terminals of the plurality of DC power sources 02i are connected to the first end of the LED load module, and the negative output terminals of the plurality of DC power sources 02i and the LED load
  • the second end of the module is connected to the power ground.
  • Each current sharing module 01i detects an output voltage of the corresponding DC power source 02i, and generates an equalization voltage according to the output voltage.
  • the plurality of equalization voltages generated by the plurality of current sharing modules 01i are output to the current sharing bus to generate a current sharing bus voltage.
  • the current sharing module 01i generates a feedback signal according to the current sharing bus voltage to adjust the output voltage of its corresponding DC power supply 02i.
  • the plurality of equalization voltages generated by the plurality of current sharing modules 01i are output to the current sharing bus to generate a current sharing bus voltage, and each current sharing module 01i generates a feedback signal according to the current sharing bus voltage to adjust the output of the corresponding DC power supply 02i.
  • voltage There are two specific situations for voltage:
  • the plurality of equalization voltages generated by the current sharing modules 01i are output to the current sharing bus to generate a current sharing bus voltage, and each current sharing module 01i generates a feedback signal according to the current sharing bus voltage to adjust the output voltage of the corresponding DC power supply 02i.
  • the equalization voltage of the main current sharing module is output to the current sharing bus to generate a current sharing bus voltage, and each of the current sharing modules compares the respective equalization voltage and the current sharing bus voltage, and generates a feedback signal to adjust each of the current sharing modules.
  • the output voltage of the corresponding DC power supply when one of the plurality of current sharing modules 01i is the main current sharing module 01i, and the plurality of current sharing modules 01i other than the main current sharing module 01i are from the current sharing module 01i.
  • one current sharing module with the largest equalization voltage in the plurality of current sharing modules is a primary current sharing module, and the plurality of current sharing modules except the main current sharing module are slave current sharing modules.
  • one of the plurality of current sharing modules is set as a primary current sharing module, and the plurality of current sharing modules except the main current sharing module are set as a secondary current sharing module.
  • the plurality of equalization voltages generated by the plurality of current sharing modules 01i are output to the current sharing bus to generate a current sharing bus voltage, and each current sharing module 01i generates a feedback signal according to the current sharing bus voltage to adjust its corresponding DC voltage.
  • the output voltage of the power source 02i is specifically: a plurality of equalization voltages generated by the plurality of current sharing modules 01i are output to the current sharing bus to generate a current sharing bus voltage, and each current sharing module 01i performs a corresponding equalization voltage and a current sharing bus voltage. Comparing and generating a feedback signal to adjust the output voltage of the DC power source 02i corresponding to each current sharing module 01i.
  • the LED load module can be a series of LED modules, a parallel LED module or a single LED.
  • FIG. 3 shows an example circuit structure of a current sharing module 01i in an LED constant voltage current sharing system according to an embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, which are detailed below. :
  • the current sharing module 01i includes a current sharing chip U1, an optical coupling U2, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
  • the current detecting terminal SENSE and the current sharing chip U1 The first end of the resistor R1 is the current sampling end of the current sharing module 01i, the power terminal Vcc of the current sharing chip U1 is connected to the first end of the second resistor R2, and the current regulating terminal ADJ of the current sharing chip U1 and the optical coupling
  • the diode negative terminal is connected, the current regulation setting terminal ADJR of the current sharing chip U1 is connected with the first end of the third resistor R3, and the external capacitor terminal COMP of the current sharing chip U1 is connected with the first end of the first capacitor C1, and the current sharing chip U1
  • the bus terminal SHARE+ is the equalized voltage terminal of the current sharing module 01i, the bus reference terminal SHARE- of the current sharing chip U1, the ground terminal GND of the
  • the emitter of the optocoupler U2 and the first end of the fourth resistor R4 are connected to the power ground.
  • the second end of the second resistor R2 is connected to the anode of the photocoupler U2, and the collector of the optocoupler U2 is a current sharing module. 01i feedback output.
  • the current sharing chip U1 includes a first operational amplifier U11, a second operational amplifier U12, a third operational amplifier U13, a fourth operational amplifier U14, a first diode D1, and a first transistor Q1, and a first operational amplifier U11.
  • the inverting input terminal is the current detecting terminal of the current sharing chip U1
  • the non-inverting input terminal of the first operational amplifier U11 is the grounding terminal GND of the current sharing chip U1
  • the output terminal of the first operational amplifier U11 and the second operational amplifier U12 are positive.
  • the input terminal is connected to the inverting input terminal of the fourth operational amplifier U4, the inverting input terminal of the second operational amplifier U12, the forward input terminal of the third operational amplifier U13, and the negative terminal of the first diode D1 are current sharing chips.
  • the bus terminal SHARE+ of U1 the output terminal of the second operational amplifier U12 is connected to the anode of the first diode D1
  • the output terminal of the third operational amplifier U13 is connected to the forward input terminal of the fourth operational amplifier U14
  • the inverting input terminal of U13 is the bus reference terminal SHARE- of the current sharing chip U1
  • the output terminal of the fourth operational amplifier U14 is connected to the base of the first transistor Q1
  • the collector of the first transistor Q1 is current sharing.
  • Chip U1 Flow regulating terminal ADJ, the emitter electrode of the first transistor Q1 is a current flow are set terminal regulator chip U1 ADJR.
  • the current sampling signal of the DC power source is input to the first operational amplifier U11 through the current detecting terminal SENSE of the current sharing chip U1, and the first operational amplifier U11 is amplified and divided into two signal outputs, and one path is amplified by the second operational amplifier U12 and then passed through the current sharing.
  • the bus terminal SHARE+ of the chip U1 is output to the current sharing bus. Since the output terminal of the second operational amplifier U12 and the bus terminal SHARE+ of the current sharing chip U1 have a diode, the current sharing module with the largest output current value on the current sharing bus becomes the main module. The remaining current sharing modules are adjusted according to the output current value of the main module.
  • the level of the forward input terminal of the fourth operational amplifier U14 of each slave module is locked to a constant value. If the output current of a current sharing module is small, the positive of the fourth operational amplifier U14 The level to the input terminal is small, the output level of the fourth operational amplifier U14 is large, and the current flowing through the first transistor Q1 is also large, so the current of the collector of the photocoupler U2 is large, thereby completing the current sharing adjustment.
  • FIG. 4 is a diagram showing another example circuit structure of the current sharing module 01i in the LED constant voltage current sharing system according to the embodiment of the present invention. For the convenience of description, only parts related to the embodiment of the present invention are shown. as follows:
  • the current sharing module 01i includes a fifth operational amplifier U5, a sixth operational amplifier U6, a seventh operational amplifier U7, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a fifth resistor R5, and a sixth Resistor R6, seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, fourteenth resistor R14, fifteenth Resistor R15, sixteenth resistor R16 and seventeenth resistor R17;
  • the positive input terminal of the fifth operational amplifier U5 is connected to the first end of the third capacitor C3 and the first end of the fifth resistor R5, and the inverting input terminal of the fifth operational amplifier U5 and the first end of the eighth resistor R8
  • the first end of the tenth resistor R10 is connected
  • the output end of the fifth operational amplifier U5 is connected to the second end of the eighth resistor R8 and the first end of the eleventh resistor R11
  • the positive input terminal of the sixth operational amplifier U6 is
  • the first end of the second capacitor C2 is connected to the first end of the seventh resistor R7
  • the inverting input end of the sixth operational amplifier U6 is connected to the first end of the ninth resistor R9 and the second end of the tenth resistor R10
  • the output end of the sixth operational amplifier U6 is connected to the second end of the ninth resistor R9 and the first end of the twelfth resistor R12
  • the fifth operational amplifier U5 and the sixth operational amplifier U6 are used to check the amplification and the seventh operation of the subsequent stage.
  • the amplifier U6 is amplified, at the output end of the seventh operational amplifier U6, a voltage value of the DC power supply and the current-sharing bus voltage error n times the amplified voltage value can be obtained, and the output voltage is positive, so that the voltage value is raised.
  • the output voltage of the feedback output terminal (the second end of the sixteenth resistor R16 and the first end of the seventeenth resistor R17) of the current sharing module 01i is increased, and the output voltage of the DC power source is increased.
  • FIG. 5 is a block diagram showing a structure of a current sharing module 01i in an LED constant voltage current sharing system according to an embodiment of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, which are detailed below. :
  • the current sharing module 01i includes a first amplifier 01i-1, a second amplifier 01i-2, a bus control module 01i-3, a clamp module 01i-4, and a third amplifier 01i-5;
  • the output of the first amplifier 01i-1 and the input of the second amplifier 01i-2, the input of the clamp module 01i-4, and the second input of the third amplifier 01i-5, the output of the second amplifier 01i-2 The end is connected to the second input and output end of the bus control module 01i-3, the input and output end of the clamp module 01i-4, and the first input end of the third amplifier 01i-5;
  • the first input end and the second input end of the first amplifier 01i-1 together form a current sampling end of the current sharing module 01i, and the first input and output end of the bus control module 01i-3 is a balanced voltage end of the current sharing module 01i,
  • the output of the three amplifier 01i-5 is the feedback output of the current sharing module 01i;
  • the first amplifier 01i-1 detects an output voltage of the DC power source 02i corresponding to the current sharing module 01i, and generates a first voltage according to the output voltage
  • the second amplifier 01i-2 generates a second voltage according to the first voltage
  • the bus control module 01i- 3 generating an equalization voltage according to the second voltage
  • the clamping module 01i-4 clamps the equalization voltage
  • the plurality of equalization voltages generate a current sharing bus voltage
  • the third amplifier 01i-5 compares the first voltage and the current sharing bus voltage, And generating a feedback signal to adjust the output voltage of the DC power source 02i corresponding to the current sharing module 01i.
  • FIG. 6 shows an exemplary circuit configuration diagram corresponding to the current sharing module 01i in the LED constant voltage current sharing system provided in FIG. 5. For convenience of explanation, only parts related to the embodiment of the present invention are shown. Said as follows:
  • the first amplifier 01i-1 includes an eighth operational amplifier U8, an adjustable resistor R01, a fifth capacitor C5, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, and a second The thirteenth resistor R23 and the twenty-fourth resistor R24; the eighth operational amplifier U8 is connected to the first end of the eighteenth resistor R18, and the eighth operational amplifier U8 is opposite to the input terminal and the twentieth resistor R20 One end is connected to the first end of the twenty-first resistor R21.
  • the second end of the eighteenth resistor R18, the first end of the nineteenth resistor R19, and the first end of the fifth capacitor C5 are the first amplifier 01i-1.
  • the first input end, the second end of the twentieth resistor R20, the second end of the nineteenth resistor R19, and the second end of the fifth capacitor C5 are the second input end of the first amplifier 01i-1, and the eighth operation
  • the output end of the amplifier U8 is connected to the first end of the twenty-fourth resistor R24, the adjustment end of the adjustable resistor R01, the first fixed end of the adjustable resistor R01, and the first end of the twenty-third resistor R23, the twenty-first
  • the second end of the resistor R21 is connected to the second fixed end of the adjustable resistor R01 and the second end of the twenty-third resistor R23, A first terminal of a second amplifier output fourteen resistor R24 to 01i-1.
  • the second amplifier 01i-2 includes a ninth operational amplifier U9, a twenty-fifth resistor R25, a twenty-sixth resistor R26, and a twenty-seventh resistor R27; a forward input terminal and a twenty-fifth resistor of the ninth operational amplifier U9
  • the first end of the R25 is connected, the second end of the twenty-fifth resistor R25 is the input end of the second amplifier 01i-2, the inverting input terminal of the ninth operational amplifier U9 and the output end of the ninth operational amplifier U9 and the second
  • the first end of the seventeen resistor R27 is connected, and the second end of the twenty seventh resistor R27 is the output of the second operational amplifier.
  • the bus control module 01i-3 includes a first FET M1, a second FET M2, and a twenty-eighth resistor R28; the drain of the first FET M1 is a first input and output of the bus control module 01i-3, The source of the first field effect transistor M1 is connected to the drain of the second field effect transistor M2, and the source of the second field effect transistor M2 is the second input and output end of the bus control module 01i-3, and the first field effect transistor M1 The gate is connected to the gate of the second field effect transistor M2, the first end of the twenty-eighth resistor R28, and the bus control signal, and the second end of the twenty-eighth resistor R28 is connected to the second power source VBB.
  • the clamping module 01i-4 includes a second diode D2, a sixth capacitor C6, a twenty-ninth resistor R29, and a thirtieth resistor R30; a first end of the twenty-ninth resistor R29 and a second diode D2
  • the negative electrode is the input and output end of the clamp module 01i-4, the second end of the twenty-ninth resistor R29 and the third power source VDD, the first end of the sixth capacitor C6, the anode of the second diode D2, and the thirtyth
  • the first end of the resistor R30 is connected, and the second end of the sixth capacitor C6 and the second end of the thirtieth resistor R30 are the input ends of the clamping module 01i-4.
  • the third amplifier 01i-5 includes a tenth operational amplifier U10, a seventh capacitor C7, a thirty-first resistor R31, and a thirty-second resistor R32; the positive input terminal of the tenth operational amplifier U10 is the third amplifier 01i-5.
  • a first input end, an inverting input terminal of the tenth operational amplifier U10, a first end of the seventh capacitor C7, and a first end of the thirty first resistor R31 are second input ends of the third amplifier 01i-5, tenth
  • the output end of the operational amplifier U10 is connected to the first end of the thirty-second resistor R32, the second end of the seventh capacitor C7, and the second end of the thirty-first resistor R31.
  • the second end of the thirty-second resistor R32 is The output of the third amplifier 01i-5.
  • the input terminal of the eighth operational amplifier U8 is connected to the sampling resistor of the DC power supply, and the amplified current signal is output to the inverting input terminal of the tenth operational amplifier U10, and the other route is amplified by the ninth operational amplifier U9 to the current sharing bus. And the positive phase input of the tenth operational amplifier U10. If the output current of a DC power supply is smaller than other DC power supplies, the voltage of the non-inverting input terminal of the tenth operational amplifier U10 will be higher than the voltage of the inverting input terminal, and the voltage of the output terminal of the tenth operational amplifier U10 will increase, that is, increase the direct current. The output voltage of the power supply increases the output current.
  • the voltage of the non-inverting input terminal of the tenth operational amplifier U10 will be lower than the voltage of the inverting input terminal, and the voltage of the output terminal of the tenth operational amplifier U10 is reduced, that is, the DC power supply is lowered.
  • the output voltage is reduced by the output current.
  • the embodiment of the present invention includes a plurality of current sharing modules, a plurality of DC power sources, and an LED load module; the plurality of current sharing modules are connected to the plurality of DC power sources one by one, and each current sharing module detects each corresponding The output voltage of the DC power source generates an equalization voltage according to the output voltage, and a plurality of equalization voltages generated by the plurality of current sharing modules are output to the current sharing bus to generate a current sharing bus voltage, and each current sharing module generates a feedback according to the current sharing bus voltage.
  • the signal adjusts the output voltage of the corresponding DC power supply, so that the current sharing effect of the parallel power supply of the LED load module can be improved.
  • LED thermostat system similar to the LED constant voltage current sharing system, which maintains multiple parallel DC power supplies at the same operating temperature and supplies power to the LED load modules, as follows:
  • the utility model comprises a plurality of DC power sources, a plurality of sensor modules and a plurality of microprocessors, wherein each sensor obtains the temperature of each DC power source corresponding to each sensor, and then obtains an average temperature through the microprocessor, and finally the microprocessor is configured according to The average temperature and the temperature of each of the DC power sources determine the feedback signals of each of the DC power sources, and each of the DC power sources adjusts the output voltage/output current according to the respective corresponding feedback signals.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Led Devices (AREA)
  • Dc-Dc Converters (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

La présente solution concerne le domaine des DEL et propose un système de partage de courant à tension constante de DEL. Dans la présente solution, le système comprend une pluralité de modules de partage de courant, une pluralité d'alimentations électriques à courant continu, et un module de charge de DEL. La pluralité de modules de partage de courant est connectée à la pluralité d'alimentations électriques à courant continu selon une correspondance biunivoque. Chaque module de partage de courant détecte une tension de sortie d'une alimentation électrique à courant continu correspondante, et génère une tension d'équilibre en fonction de la tension de sortie. La pluralité de tensions d'équilibre générées par la pluralité de modules de partage de courant est délivrée à un bus de partage de courant pour générer une tension de bus de partage de courant. Chaque module de partage de courant génère un signal de rétroaction en fonction de la tension de bus de partage de courant pour ajuster une tension de sortie de l'alimentation électrique à courant continu correspondante. Par conséquent, l'effet de partage de courant d'une alimentation électrique parallèle du module de charge de DEL peut être amélioré.
PCT/CN2018/081237 2017-03-31 2018-03-30 Système de partage de courant à tension constante de del Ceased WO2018177389A1 (fr)

Applications Claiming Priority (2)

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CN201710209405.X 2017-03-31
CN201710209405.XA CN108668403B (zh) 2017-03-31 2017-03-31 一种led恒压均流系统

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WO2018177389A1 true WO2018177389A1 (fr) 2018-10-04

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CN109755935A (zh) * 2019-01-31 2019-05-14 洛阳隆盛科技有限责任公司 一种电源并联均流控制电路
CN114389465A (zh) * 2021-12-17 2022-04-22 国网福建省电力有限公司 一种实现多整流桥柜并联运行且均流输出的装置
CN114430596A (zh) * 2021-12-23 2022-05-03 深圳市崧盛电子股份有限公司 Led电源的均流控制系统和方法、多功能灯杆

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CN110941295A (zh) * 2019-12-27 2020-03-31 重庆希诺达通信有限公司 一种多电源模块温度均衡控制系统
CN110994585B (zh) * 2019-12-31 2021-10-15 浙江中控技术股份有限公司 一种供电系统
CN115512643A (zh) * 2021-06-21 2022-12-23 广州视源电子科技股份有限公司 一种led显示电源及显示设备
CN116780734B (zh) * 2023-08-23 2023-11-14 洛仪科技(苏州)有限公司 一种基于极值控制的直流电源并联控制电路及其控制方法

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