EP3510836B1 - Operating device with power factor correction and ripple compensation by change in operation - Google Patents

Operating device with power factor correction and ripple compensation by change in operation Download PDF

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Publication number
EP3510836B1
EP3510836B1 EP16921213.1A EP16921213A EP3510836B1 EP 3510836 B1 EP3510836 B1 EP 3510836B1 EP 16921213 A EP16921213 A EP 16921213A EP 3510836 B1 EP3510836 B1 EP 3510836B1
Authority
EP
European Patent Office
Prior art keywords
cbulk
energy store
light
operating device
emitting means
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
EP16921213.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3510836A4 (en
EP3510836A1 (en
Inventor
Yaofeng LIN
Zhihong ZOU
Junxiang LIN
Guoji Zhong
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
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 EP3510836A1 publication Critical patent/EP3510836A1/en
Publication of EP3510836A4 publication Critical patent/EP3510836A4/en
Application granted granted Critical
Publication of EP3510836B1 publication Critical patent/EP3510836B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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]
    • H05B45/30—Driver circuits
    • H05B45/355—Power factor correction [PFC]; Reactive power compensation
    • 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]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • 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

  • the invention relates to an operating device for a light-emitting means in accordance with the preamble of patent claim 1 and to a method in accordance with the preamble of patent claim 7.
  • Such operating devices are used in lighting systems in order to achieve lighting of rooms, routes or else escape routes.
  • the light-emitting means are actuated and, if necessary, activated by operating devices.
  • gas discharge lamps or else light-emitting diodes (LEDs) are used as light source.
  • US 2014/346965 A1 shows an operating device for light emitting means having a driver circuit, an energy storage and a power factor correction circuit.
  • the voltage at the energy storage of the power factor correction circuit is monitored, and an operation of the operating device is changed, if the ripple of the voltage and the energy store exceeds a predetermined limit value.
  • US 2014/346965 A1 shows reducing the output current, in this case.
  • US 2016/204693 A1 shows a two-stage electronic ballast including a boost power factor control (PFC) stage at the input, an intermediate circuit electrolytic capacitor which supplies a second stage of the two-stage electronic ballast, which second stage supplies the load with electrical energy.
  • PFC boost power factor control
  • the power drawn from the intermediate circuit capacitor by the second stage is set, such that an undershooting of a required minimum intermediate circuit voltage is avoided.
  • the intermediate circuit capacitor has applied to it a maximum possible current that still allows intended operation of the energy converter, such that rapid heating of the intermediate circuit capacitor is achieved leading to a reduction of the ESR.
  • the object of the invention consists in providing an operating device for a light-emitting means which has power factor correction and only transmits very low levels of interference.
  • the invention relates to an operating device for a light-emitting means according to claim 1.
  • the operating device preferably has means for estimating the life of the energy store to be expected. These means for estimating the life to be expected preferably evaluate the detected ripple of the voltage at the energy store. Optionally, in addition also further measurements or actuation variables can be evaluated within the operating device.
  • the invention also relates to a method for operating light-emitting means according to claim 7.
  • Figure 1 shows an operating device A for a light-emitting means.
  • Such an operating device A for a light-emitting means typically has a driver circuit (lamp driver) for operating at least one light-emitting means (load), an energy store, which feeds the driver circuit, a power factor correction circuit (PFC), which can be in the form of a boost converter and feeds the energy store, having a storage inductor, an actively clocked switch and a rectifying diode.
  • a filter circuit and a rectifier circuit are preferably connected upstream of the power factor correction circuit.
  • the driver circuit is a resonant half-bridge for actuating a lamp load.
  • the driver circuit can also be formed by a resonant half-bridge with electrical isolation and rectification at the output for actuating LEDs.
  • Figure 2 shows a power factor correction circuit according to the invention for an operating device for a light-emitting means.
  • the power factor correction circuit is in the form of a boost converter and feeds the energy store Cbulk.
  • the energy store Cbulk is, for example, an electrolytic capacitor. It has a storage inductor Lb, an actively clocked switch S and a rectifying diode D.
  • the operating device (A) for a light-emitting means has at least one driver circuit for operating at least one light-emitting means, an energy store (Cbulk), which feeds the driver circuit (LED driver), and a power factor correction circuit, which is preferably in the form of a boost converter and feeds the energy store (Cbulk), having a storage inductor (Lb), an actively clocked switch (S) and a rectifying diode (D).
  • the voltage at the energy store (Cbulk) is monitored, and the operation of the operating device (A) is changed if the ripple of the voltage at the energy store (Cbulk) exceeds a predetermined limit value.
  • the operating device (A) for a light-emitting means changes the operation of the driver circuit (LED driver) and of the power factor correction circuit if the ripple of the voltage at the energy store (Cbulk) exceeds a predetermined limit value.
  • the voltage at the energy store (Cbulk) can be decreased if the ripple of the voltage at the energy store (Cbulk) exceeds a predetermined limit value.
  • the control loop or the control parameters of the power factor correction circuit can be changed.
  • the power output or output current by the driver circuit (LED driver) is increased.
  • driver circuits LED drivers
  • the driver circuit (LED driver) is preferably a circuit with radiofrequency clocking having at least one actively clocked switch and one inductance (L), which is charged and discharged by the radiofrequency clocking.
  • the driver circuit (LED driver) is, for example, a buck converter, an isolated flyback converter or an inverter circuit.
  • a plurality of light emitting means are fed directly or indirectly from the driver circuits (LED drivers) and, according to the invention, in the event that a limit value for the ripple of the voltage at the energy store (Cbulk) is exceeded, at least some additional light-emitting means are connected to the driver circuit (LED driver).
  • LED driver there may be a bridging switch arranged in parallel to one or more light emitting means which is permanently closed at the start of operation.
  • the bridging switch may be permanently opened and thus additional light emitting means would be powered by the driver circuit (LED driver).
  • LED driver which is in the form of a buck converter is shown in figure 3 .
  • the LEDs in the LED string are actuated depending on the clocking of the switch S.
  • the power output or output current by the driver circuit could be increased by clocking of the switch S with a increased duty factor.
  • the light-emitting means can be an LED or a gas discharge lamp.
  • the operating device (A) can transmit a fault message via an interface or optical signalling via the light-emitting means can take place in the event that a limit value for the ripple of the voltage at the energy store (Cbulk) is exceeded.
  • a power factor correction circuit feeds the energy store (Cbulk) and an energy store (Cbulk) feeds the driver circuit (LED driver).
  • the voltage at the energy store (Cbulk) is monitored, and the operation of the light-emitting means is performed depending on the detected ripple of the voltage at the energy store (Cbulk) a predetermined limit value.
  • Temperature monitoring can be performed at the energy store (Cbulk), the power factor correction circuit or the driver circuit (LED driver) and, as a result of a predetermined limit temperature being exceeded, a reduction in the power or current transmitted to the light-emitting means or else another change to the operation of the light-emitting means can be performed, and the value of the limit temperature to be predetermined can be set depending on the detected ripple of the voltage at the energy store (Cbulk).
  • Such limitation of current or power transmitted to the light-emitting means in case of high temperature may prevent damages from the operating device.
  • a lighting unit having an operating device A for a light-emitting means comprising the power factor correction circuit according to the invention can be constructed.
  • the life to be expected of the energy store (Cbulk) and therefore also of the entire operating device (1) can be estimated.
  • the operating device (A) therefore has means for estimating the life to be expected of the energy store (Cbulk). Said means preferably evaluate the detected ripple of the voltage at the energy store (Cbulk), but it is optionally also additionally possible for further measurements or actuation variables to be evaluated.
  • the operating device is designed for estimating the life to be expected of the energy store (Cbulk) on the basis of the detected ripple of the voltage at the energy store (Cbulk).
  • the operating device (A) can also have further power stages connected in series.
  • an energy store can be arranged in each case between these power stages, it being possible for the voltage ripple of said energy stores to be monitored for identification of aging.
  • the ripple of the voltage at the energy store (Cbulk) can be read, for example, via an analog-to-digital converter.
  • This analog-to-digital converter can be part of an integrated control circuit, which can also influence the operation of the operating device.
  • this integrated control circuit can actuate, for example, the actively clocked switch (S) of the power factor correction circuit or else the switch(es) of the driver circuit (LED driver).
  • the operating device (A) has an interface
  • reading of the life to be expected may also be possible via this interface.
  • the reading can for example automatically in the event that a predetermined value for the life to be expected is exceeded or else the present value for the life can be output in response to an external request via the interface.
  • the operating device (A) can transmit a fault message via an interface since, as described, the fact that a limit value for the ripple of the voltage at the energy store (Cbulk) is exceeded indicates that a specific life of the energy store (Cbulk) has been exceeded.
  • a stepwise compensation of the ageing of the operating device, especially the energy store (Cbulk) as well as the ageing of the light-emitting means may be compensated and the light intensity of the light-emitting means may be held constant.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP16921213.1A 2016-11-08 2016-11-08 Operating device with power factor correction and ripple compensation by change in operation Active EP3510836B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/105035 WO2018085976A1 (en) 2016-11-08 2016-11-08 Operating device with power factor correction and ripple compensation by change in operation

Publications (3)

Publication Number Publication Date
EP3510836A1 EP3510836A1 (en) 2019-07-17
EP3510836A4 EP3510836A4 (en) 2020-05-13
EP3510836B1 true EP3510836B1 (en) 2023-01-04

Family

ID=62109019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16921213.1A Active EP3510836B1 (en) 2016-11-08 2016-11-08 Operating device with power factor correction and ripple compensation by change in operation

Country Status (3)

Country Link
EP (1) EP3510836B1 (zh)
CN (1) CN109952813B (zh)
WO (1) WO2018085976A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113381613B (zh) * 2018-03-14 2022-10-04 海信视像科技股份有限公司 电源控制电路和显示设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7262584B2 (en) * 2004-02-19 2007-08-28 Analog Modules, Inc Efficient fast pulsed laser or light-emitting diode driver
US8193738B2 (en) * 2009-08-07 2012-06-05 Phihong Technology Co., Ltd. Dimmable LED device with low ripple current and driving circuit thereof
AT13441U1 (de) * 2011-12-23 2013-12-15 Tridonic Gmbh & Co Kg Betriebsgerät mit leistungsfaktorkorrektur
DE102012007477B4 (de) * 2012-04-13 2024-02-22 Tridonic Gmbh & Co Kg Verfahren zum Betreiben eines LLC-Resonanzwandlers für ein Leuchtmittel, Wandler und LED-Konverter
CN102833916B (zh) * 2012-08-23 2014-10-15 冠捷显示科技（厦门）有限公司 一种直流调光型led驱动电路
DE102013216878A1 (de) * 2013-08-23 2015-02-26 Osram Gmbh Zweistufiger getakteter elektronischer Energiewandler
CN103917017B (zh) * 2014-03-10 2016-08-31 上海大学 一种单级式无电解电容ac/dc led恒流驱动电源
US9271352B2 (en) * 2014-06-12 2016-02-23 Power Integrations, Inc. Line ripple compensation for shimmerless LED driver
CN104066247B (zh) * 2014-06-24 2017-02-01 浙江生辉照明有限公司 一种led照明装置的驱动电路及调光控制方法

Also Published As

Publication number Publication date
EP3510836A4 (en) 2020-05-13
CN109952813B (zh) 2021-06-22
WO2018085976A1 (en) 2018-05-17
CN109952813A (zh) 2019-06-28
EP3510836A1 (en) 2019-07-17

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