EP3900494B1 - Alimentation électrique pour lampe - Google Patents

Alimentation électrique pour lampe Download PDF

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Publication number
EP3900494B1
EP3900494B1 EP18938325.0A EP18938325A EP3900494B1 EP 3900494 B1 EP3900494 B1 EP 3900494B1 EP 18938325 A EP18938325 A EP 18938325A EP 3900494 B1 EP3900494 B1 EP 3900494B1
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EP
European Patent Office
Prior art keywords
power supply
controller
adjustment signal
signal
processed
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.)
Active
Application number
EP18938325.0A
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German (de)
English (en)
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EP3900494A4 (fr
EP3900494A1 (fr
Inventor
Cui ZHOU
Xingming HE
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
Original Assignee
Tridonic GmbH and Co KG
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Publication of EP3900494A4 publication Critical patent/EP3900494A4/fr
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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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
    • 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
    • H05B45/32—Pulse-control circuits
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/39—Circuits containing inverter bridges

Definitions

  • Embodiments of the present disclosure generally relate to the field of electrical apparatus, and more particularly to a power supply for a lamp.
  • the invention relates to a power supply for a lamp according to claim 1.
  • Preferred embodiments of the invention are defined by the dependent claims.
  • the power supply isolates the input side (primary side) and output side (secondary side), thus it is safer for users to use.
  • some power supplies have dimming function, the users may change an output state of the power supply according to various applications.
  • CN 106 992 664 A discloses a power supply for a lamp according to the preamble of independent claim 1.
  • the first solution is as follows: a feedback signal is detected by a detection circuit on the secondary side, and the feedback signal is transmitted to a control circuit on the primary side via an isolator. The control circuit adjusts the work state according to the feedback signal, until the output state of the power supply is in accordance with the state of the input adjustment signal.
  • the second solution is as follows: a feedback signal on the secondary side is encoded by a modulator and transmitted to a control circuit on the primary side by means of a preferably electrically isolated signal transformer. Then the signal decoded by a demodulator and transmission through a filter or a frequency discriminator to the control circuit. And the control circuit outputs an adjustment signal to a main circuit according to the feedback signal. By detecting the operation state of the secondary side and coupling the feedback signal to the primary side, then the main control circuit adjusts the working state according to the feedback signal, so that the working state of the power supply is consistent with requirements.
  • embodiments of the present disclosure provide a power supply for a lamp.
  • an adjustment signal is detected and processed by a first controller on a primary side, and the processed adjustment signal is transmitted to a second controller on a secondary side via an isolator.
  • the quality of the adjustment signal is ensured in the transmission, and the output state of the power supply may be adjusted accurately by the second controller on the secondary side.
  • no additional circuit for translating and encoding or decoding signals is needed.
  • a power supply for a lamp including: a first controller on a primary side of the power supply; a second controller on a secondary side of the power supply; and an isolator between the primary side and the secondary side, the first controller detects and processes an adjustment signal, and transmits the processed adjustment signal to the second controller via the isolator.
  • the second controller adjusts an output state of the power supply according to the adjustment signal.
  • the first controller translates and encodes the adjustment signal, to obtain the processed adjustment signal
  • the second controller decodes and translates the processed adjustment signal, to obtain the adjustment signal.
  • the isolator includes an optocoupler.
  • an input voltage and an output voltage of the optocoupler are square waves with a same frequency and different duty cycles.
  • the isolator includes a capacitor.
  • an input voltage and an output voltage of the capacitor are square waves with different frequencies and a same duty cycle.
  • the first controller comprises a first MCU (Microcontroller Unit).
  • the second controller comprises a second MCU.
  • the adjustment signal is a variable signal, a digital signal, e. g. a DALI (Digital Addressable Lighting Interface) signal or an analog signal, e. g. a 0 - 10 V signal.
  • a digital signal e. g. a DALI (Digital Addressable Lighting Interface) signal
  • an analog signal e. g. a 0 - 10 V signal.
  • the lamp is a LED light.
  • an adjustment signal is detected and processed by a first controller on a primary side, and the processed adjustment signal is transmitted to a second controller on a secondary side via an isolator.
  • the quality of the adjustment signal is ensured in the transmission, and the output state of the power supply may be adjusted accurately by the second controller on the secondary side.
  • no additional circuit for translating and encoding or decoding signals is needed.
  • the terms “first” and “second” refer to different elements.
  • the singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the terms “comprises,” “comprising,” “has,” “having,” “includes” and/or “including” as used herein, specify the presence of stated features, elements, and/or components and the like, but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof.
  • a power supply for a lamp is provided in a first embodiment.
  • Fig. 1 is a diagram of a power supply for a lamp with an embodiment of the present disclosure.
  • a power supply 100 includes:
  • the power supply 100 may be any type of dimmable power supply.
  • the power supply 100 is dimmable with PWM (Pulse Width Modulation), or amplitude modulation or a combination of PWM and amplitude modulation.
  • PWM Pulse Width Modulation
  • amplitude modulation or a combination of PWM and amplitude modulation.
  • the power supply 100 may further include a rectifier 104 and a flyback circuit 105.
  • the rectifier 104 may be a bridge rectifier (BR), which includes a diode D1.
  • BR bridge rectifier
  • the flyback circuit 105 may include a switch S 1, a transformer T, capacitors C1 and C2 and a diode D2.
  • the lamp 10 may be any type of lamp.
  • the lamp 10 is a LED light.
  • the first controller 101 and the second controller 102 may be any type of controller.
  • the first controller 101 includes a first MCU (Microcontroller Unit), and the second controller 102 includes a second MCU.
  • first MCU Microcontroller Unit
  • second MCU Microcontroller Unit
  • the adjustment signal is detected by the first controller 101 on the primary side.
  • the adjustment signal may be various types of signals.
  • the adjustment signal is a variable signal, a digital signal, e. g. DALI (Digital Addressable Lighting Interface) signal or an analog signal, e. g. a 0 - 10 V signal.
  • the adjustment signal could be sent also over the AC power lines of the power supply 100.
  • the voltage of the variable signal may be changed in a range of 0 - 10V.
  • the first controller 101 may translate and encode the adjustment signal, to obtain the processed adjustment signal. And the processed adjustment signal is transmitted to the second controller 102 via the isolator 103.
  • the second controller may decode and translate the processed adjustment signal, to obtain the adjustment signal.
  • the adjustment signal may be transmitted from the primary side to the secondary side with good quality and without any additional circuit for translating and encoding or decoding signals.
  • the second controller 102 may adjust the output state of the power supply according to the adjustment signal.
  • the second controller 102 may use an existing method for adjusting the output state of the power supply.
  • an adjustment signal is detected and processed by a first controller on a primary side, and the processed adjustment signal is transmitted to a second controller on a secondary side via an isolator.
  • the quality of the adjustment signal is ensured in the transmission, and the output state of the power supply may be adjusted accurately by the second controller on the secondary side.
  • no additional circuit for translating and encoding or decoding signals is needed.
  • a power supply for a lamp is provided in a second embodiment.
  • Fig. 2 is another diagram of a power supply for a lamp in accordance with an example not forming part of the present disclosure.
  • a power supply 200 includes:
  • the optocoupler 203 is applied as an isolator.
  • first MCU 201, the second MCU 202 and the optocoupler 203 may be similar to those of the first controller 101, the second controller 102 and the isolator 103 in the first embodiment, and shall not be described herein any further.
  • constructions and functions of other parts of the power supply 200 may be similar to those in the related art, and shall not be described herein any further.
  • the adjustment signal is input and detected by the first MCU 201, and the processed adjustment signal is output by the first MCU 201.
  • Vp1 is the voltage of the processed adjustment signal and is input into the optocoupler 203.
  • Vs1 is the voltage of the processed adjustment signal output from the optocoupler 203.
  • Fig. 3 is a diagram of the voltages of the processed adjustment signal before input into the optocoupler and output from it in accordance with an example not forming part of the present disclosure.
  • Vp1 and Vs1 are square waves with a same frequency and different duty cycles.
  • the duty cycle of the Vp1 may be in a range of 1% to 100%.
  • an adjustment signal is detected and processed by a first controller on a primary side, and the processed adjustment signal is transmitted to a second controller on a secondary side via an isolator.
  • the quality of the adjustment signal is ensured in the transmission, and the output state of the power supply may be adjusted accurately by the second controller on the secondary side.
  • no additional circuit for translating and encoding or decoding signals is needed.
  • a power supply for a lamp is provided in a third embodiment.
  • Fig. 4 is another diagram of a power supply for a lamp with an embodiment of the present disclosure.
  • a power supply 300 includes:
  • the capacitor 303 is applied as an isolator.
  • Functions of the first MCU 301, the second MCU 302 and the capacitor 303 may be similar to those of the first controller 101, the second controller 102 and the isolator 103 in the first embodiment, and shall not be described herein any further.
  • constructions and functions of other parts of the power supply 300 may be similar to those in the related art, and shall not be described herein any further.
  • the adjustment signal is input and detected by the first MCU 301, and the processed adjustment signal is output by the first MCU 301.
  • Vp2 is the voltage of the processed adjustment signal and is input into the capacitor 303.
  • Vs2 is the voltage of the processed adjustment signal output from the capacitor 303.
  • Fig. 5 is a diagram of the voltages of the processed adjustment signal before input into the capacitor and output from it with an embodiment of the present disclosure.
  • Vp2 and Vs2 are square waves with different frequencies and a same duty cycle.
  • the duty cycle of the Vp2 and VS2 may be 50%.
  • an adjustment signal is detected and processed by a first controller on a primary side, and the processed adjustment signal is transmitted to a second controller on a secondary side via an isolator.
  • the quality of the adjustment signal is ensured in the transmission, and the output state of the power supply may be adjusted accurately by the second controller on the secondary side.
  • no additional circuit for translating and encoding or decoding signals is needed.
  • a power supply for a lamp is provided in a fourth embodiment.
  • Fig. 6 is another diagram of a power supply for a lamp in accordance with an example not forming part of the present disclosure.
  • a power supply 400 includes:
  • the optocoupler 403 is applied as an isolator.
  • first MCU 401, the second MCU 402 and the optocoupler 403 may be similar to those of the first controller 101, the second controller 102 and the isolator 103 in the first embodiment, and shall not be described herein any further.
  • a switching regulator e.g. a half bridge converter, supplied from a DC voltage V DC with a high switch HS and a low switch LS connected in a half bridge.
  • the switches of the half bridge can be transistors, e.g. FETs or MOSFETs .
  • LS an LLC series is connected with capacity Cr followed by an inductivity Lr (forming a resonant LC circuit) and the primary side inductivity Lm of the transformer.
  • the secondary side inductivity Lt of the transformer is shown connected to diodes Dl and D2 providing a DC LED current I LED to the lighting means, in this case the LED.
  • the LED current I LED is shunt to ground via shunt resistor R sns .
  • an adjustment signal is detected and processed by a first controller on a primary side, and the processed adjustment signal is transmitted to a second controller on a secondary side via an isolator.
  • the quality of the adjustment signal is ensured in the transmission, and the output state of the power supply may be adjusted accurately by the second controller on the secondary side.
  • no additional circuit for translating and encoding or decoding signals is needed.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (8)

  1. Alimentation électrique (100 ; 300) pour une lampe (10), comprenant :
    un premier contrôleur (101 ; 301) sur un côté primaire de l'alimentation électrique (100 ; 300) ;
    un second contrôleur (102 ; 302) sur un côté secondaire de l'alimentation électrique (100 ; 300) ; et
    un isolateur (103 ; 303) comprenant un condensateur entre le côté primaire et le côté secondaire, dans lequel
    le premier contrôleur (101 ; 301) est configuré pour détecter et traiter un signal d'ajustement, et transmettre le signal d'ajustement traité au second contrôleur (102 ; 302) par l'intermédiaire de l'isolateur (103 ; 303), dans lequel,
    le second contrôleur (102 ; 302) est configuré pour ajuster un état de sortie de l'alimentation électrique (100 ; 300) selon le signal d'ajustement traité ;
    caractérisé en ce que
    le premier contrôleur est configuré pour traduire et coder le signal d'ajustement afin d'obtenir le signal d'ajustement traité.
  2. Alimentation électrique (100 ; 300) selon la revendication 1, dans laquelle,
    le second contrôleur (102 ; 302) est configuré pour décoder et traduire le signal d'ajustement traité, afin d'obtenir le signal d'ajustement.
  3. Alimentation électrique selon la revendication 1 ou la revendication 2, dans laquelle,
    une tension d'entrée et une tension de sortie du condensateur sont des ondes carrées avec des fréquences différentes et un même rapport cyclique.
  4. Alimentation électrique (100 ; 300) selon l'une quelconque des revendications 1 à 3, dans laquelle, le premier contrôleur (101 ; 301) comprend une première MCU (unité de microcontrôleur).
  5. Alimentation électrique (100 ; 300) selon l'une quelconque des revendications 1 à 4, dans laquelle, le second contrôleur (102 ; 302) comprend une seconde MCU.
  6. Alimentation électrique (100 ; 300) selon l'une quelconque des revendications 1 à 5, dans laquelle, le signal d'ajustement est un signal variable, un signal numérique ou un signal analogique.
  7. Alimentation électrique (100 ; 300) selon la revendication 6, dans laquelle,
    le signal numérique est un signal DALI (interface d'éclairage adressable numérique),
    le signal analogique est un signal 0-10 V.
  8. Alimentation électrique (100 ; 300) selon l'une quelconque des revendications 1 à 7, dans laquelle,
    la lampe (10) est une lumière LED.
EP18938325.0A 2018-10-29 2018-10-29 Alimentation électrique pour lampe Active EP3900494B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/112333 WO2020087199A1 (fr) 2018-10-29 2018-10-29 Alimentation électrique pour lampe

Publications (3)

Publication Number Publication Date
EP3900494A1 EP3900494A1 (fr) 2021-10-27
EP3900494A4 EP3900494A4 (fr) 2022-05-18
EP3900494B1 true EP3900494B1 (fr) 2023-09-20

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EP18938325.0A Active EP3900494B1 (fr) 2018-10-29 2018-10-29 Alimentation électrique pour lampe

Country Status (3)

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EP (1) EP3900494B1 (fr)
CN (1) CN112970334B (fr)
WO (1) WO2020087199A1 (fr)

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Also Published As

Publication number Publication date
EP3900494A4 (fr) 2022-05-18
CN112970334B (zh) 2023-09-29
EP3900494A1 (fr) 2021-10-27
CN112970334A (zh) 2021-06-15
WO2020087199A1 (fr) 2020-05-07

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