EP3419389A1 - Commande de phase realisée par interruption - Google Patents

Commande de phase realisée par interruption Download PDF

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Publication number
EP3419389A1
EP3419389A1 EP18174807.0A EP18174807A EP3419389A1 EP 3419389 A1 EP3419389 A1 EP 3419389A1 EP 18174807 A EP18174807 A EP 18174807A EP 3419389 A1 EP3419389 A1 EP 3419389A1
Authority
EP
European Patent Office
Prior art keywords
thyristor
phase control
control according
coil
core
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.)
Granted
Application number
EP18174807.0A
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German (de)
English (en)
Other versions
EP3419389B1 (fr
Inventor
Friedhelm Holtz
Rainer Köllner
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.)
Insta GmbH
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Insta GmbH
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Publication date
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Publication of EP3419389A1 publication Critical patent/EP3419389A1/fr
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Publication of EP3419389B1 publication Critical patent/EP3419389B1/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
    • H05B45/31—Phase-control circuits

Definitions

  • the invention relates to a two-wire phase-angle control for a low-energy consumer, such as an LED lamp, comprising an electronic power setting with an inductor provided by a core having a core and a noise suppression capacitor.
  • Dimmers are often designed as so-called two-wire devices for driving at least one energy consumer, so that they can be used easily in an existing installation instead of switches in flush-mounted boxes.
  • two-wire devices are to be understood in the context of these embodiments devices that have only two ports like a simple switch. Such devices do not have a third connection for a neutral conductor. Thus, such a device must take the energy for its own needs the current flow, it is used to control it.
  • the brightness of light sources such as a room lighting or other electrical consumers is set in many cases.
  • Such dimmers have been available for many years and are designed for dimming nominal powers of at least 20 to 60 watts.
  • This power design is based on the performance of the past incandescent or halogen lamps.
  • the electronic power setting is typically realized by a triac pulse drive circuit. This is inexpensive and garhardd.
  • Such a drive circuit requires an inductor to protect the power controller and to comply with the radio interference suppression.
  • the inductance causes a damping of the load current when switching on the power controller, the triac, so that the triac current rises slowly.
  • a suppression capacitor to comply with the interference suppression according to standard is required in parallel to the dimmer circuit.
  • phase control controls which were designed at the time for dimming higher loads, can only be used to a limited extent if low-energy loads, such as LED lamps, are to be dimmed.
  • low-energy loads such as LED lamps
  • the minimum load of such a phase control is lower, with the result that flickering is observed when such dimmers are used for dimming, for example, LED lamps.
  • flickering is observed when such dimmers are used for dimming, for example, LED lamps.
  • the latching and holding current at these low loads especially when dimmed, falls below and within the network half-wave between its Leitend ein and its non-Leitend ein.
  • ghosting in the off state of the dimmer.
  • the triac In order to avoid the flicker in a phase control of low-energy loads, such as LEDs, has been replaced by a thyristor control in such a phase control as an electronic power controller, the triac.
  • thyristors require much lower gate currents than triacs.
  • the gate current for the entire half-wave can be made available from the ignition point.
  • the thyristor remains switched on regardless of the load with the set phase angle. Even if an undesired flicker can be avoided with a prior art thyristor control circuit, the noise is still observed.
  • a filter member such is used, as this is known from triac drives, thus a coil of low quality as an inductor and a suppression capacitor with a corresponding capacity, for example, 100 nF.
  • this may be unproblematic in some cases, this is perceived as unpleasant in dimmers with which light sources, such as a room lighting to be dimmed.
  • a dimmer hum at least in the vicinity of the dimmer to hear.
  • the present invention seeks to propose a phase control, in which when driving low-energy loads, such as LED lamps, not only avoided flickering, but in which a noise is significantly reduced or avoided altogether.
  • loads with even smaller nominal powers than previously possible were safely dimmed, such as LED lamps with only 1 W nominal power.
  • the electronic power position is designed as a thyristor with two antiparallel thyristor circuits with at least one thyristor and the coil core of the coil inductance is made of a magnetostriction poor or magnetostriction-free material.
  • the electronic power position is realized by a thyristor drive circuit with two thyristors in this phase control.
  • the coil core of the inductance magnetostriction poor or magnetostriction-free is executed.
  • this is a coil with a core of high quality, ie a coil in which the damping of the resonant circuit is significantly lower than in a coil with low coil quality. Under the same conditions, this also reduces the power loss of the dimmer.
  • pulse control coils with a low coil quality were deliberately used in the prior art, in order to avoid the resulting by the suppression capacitor and the coil oscillation and thus flicker of the lamp by falling below the latching and holding current.
  • the proposal to provide an inductance through a coil with high coil quality therefore, contrary to the teaching of prevailing opinion.
  • this concept makes use of the possibilities of a thyristor drive circuit in order to use an inductance with a coil with a coil core of a material of high quality.
  • the oscillation of the coil does not lead to a switching of the thyristor, since the Thyristoran Kunststoffscnies is designed so that after ignition for the duration of each line half-wave in its gate, a sufficiently large current flows.
  • This feature of a Thyristoran horrscnies used in the proposed phase control not only to avoid flicker, but also so that a very low-noise or noise-free coil high quality and therefore at the same time a low-noise or noise-canceling suppression capacitor can be used.
  • the capacitance of the suppression capacitor need only be less than 35 nF.
  • the use of suppression capacitors for example, have only a capacity of 10 nF to 25 nF.
  • the lower limit of the use of these suppression capacitors is determined in this concept not only by the coil, as this can have a correspondingly high inductance, but also by the EMC requirements to be met. This allows the use noiseless Capacitors.
  • capacitors having such a small capacitance are very small in size and can be designed as SMD capacitors. Therefore, these can readily be accommodated in a standardized flush-mounted box together with the other components of such a phase control.
  • Magnetostriction-free coil cores are noiseless. Magnetostriction poor coil cores cause no significant hum or buzzing noise. Thus, by this phase gating control, noise minimization is provided in two ways, both with respect to the inductance and with respect to the noise suppression capacitor.
  • An alloy consisting of the coil core is suitable as an alloy of 83-87% Fe, 7-10.5% Si and 5-6.5% Al, this alloy preferably having the following composition: 84-86% Fe, 8 , 5 - 9.8% Si and 5.3 - 6.1% Al.
  • Such a coil core is preferably a powder composite material with air inclusions.
  • the basic brightness is adjustable by a variable resistor 11.1.
  • the maximum brightness is fixed with another resistor 11.
  • FIG. 1 shows a block diagram of a phase control as the Thyristor horrscrien is executed.
  • the executed in the illustrated embodiment as Phasenanroughdimmer 1 circuit is used to drive a series-connected LED lamp 2.
  • the LED lamp 2 and the phase gating dimmer 1 are connected to an AC voltage source 3.
  • the power position of the illustrated embodiment has two antiparallel thyristor circuits, each with a thyristor 4, 4.1, so that in each AC half-cycle, a thyristor 4 or 4.1 is in its forward direction.
  • the source terminal of the thyristor 4 is connected to the drain terminal of the thyristor 4.1.
  • the source terminal of the thyristor 4.1 is connected to the drain terminal of the thyristor 4.
  • Each thyristor 4, 4.1 is assigned a drive circuit 5, 5.1.
  • the drive circuits 5, 5.1 ensure that a current is applied to the gate 6, 6.1 of the respective thyristor 4, 4.1 for the duration of the conducting phase of a half-wave.
  • the gate drive lines 7, 7.1 is in each case a resistor, 8, 8.1 between the drive circuits 5, 5.1 and the respective gate 6, 6.1 is turned on.
  • the drive circuits 5, 5.1 are the same in terms of their individual components and not shown in detail. Overall, this is the known thyristor circuit.
  • adjusting member 9 Connected to the drive circuits 5, 5.1 to an adjusting member 9, via which the desired dimming position is set.
  • a potentiometer 10 In the illustrated embodiment serves for this purpose as a manual actuator therein a potentiometer 10.
  • the adjusting member 9 are also associated with two resistors 11, 11.1.
  • the resistor 11 is used to set the maximum brightness and the resistor 11.1 to the user side adjustable adjustment of the minimum brightness.
  • the maximum brightness should be as large as possible with dimmers, whereby the circuit must also be safely designed with regard to standard tests.
  • Two capacitors 12, 12.1 are associated with the drive circuits 5, 5.1.
  • the phase gating dimmer 1 further comprises a filter member 13 with a coil high-coil coil 14 and with a suppression capacitor 15.
  • the coil 14 has a coil core with extremely low magnetostriction. In the illustrated embodiment, this consists of 85% Fe, 9.6% Si and 5.4% Al.
  • the spool core is made by means of a powder metallurgical process. Thus, this spool core is a powder composite workpiece.
  • the inductance of the coil is high, so high that the capacitance of the noise suppression capacitor 15 can be minimized to satisfy the EMC requirements.
  • the capacitance of the suppression capacitor 15 is nF. In the illustrated embodiment, this is designed as an SMD component.
  • the resistors 8, 8.1 in the gate connection lines 7, 7.1 are designed high impedance, so that the capacitors 12, 12.1 only have to have a correspondingly lower capacity. This prevents together with the small RFI 15 in many cases a so-called ghosting of the LED lamp 2.
  • the small capacity of the suppression capacitor 15 allows it to be designed as a noise-free capacitors.
  • the amount of current to be protected is relatively small for LED and comparable loads.
  • the current to be protected in the illustrated embodiment is only so large that they can be performed by self-resetting fuses as an electrical component, so-called Polyswitche.
  • the use of such a fuse is also made possible by the damping of the coil, since such fuses are much slower than non-self-resetting fuses.
  • the two antiparallel thyristor circuits described in the preceding embodiment may be integrated as follows:
  • the two thyristors 4, 4.1 may be implemented as one component in an integrated circuit with a 4-pole housing, for example a known TO-220 based housing. This can be used without modification for such a triac dimmer.
  • the drive circuits which include the actual drive circuits 5, 5.1 and the associated circuit parts 7, 8 and 7.1, 8.1 are, while maintaining the isolation conditions as two monolithic circuits in a housing, for example integrated into an SMD housing.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP18174807.0A 2017-06-21 2018-05-29 Commande de phase realisée par interruption Active EP3419389B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017113637.1A DE102017113637A1 (de) 2017-06-21 2017-06-21 Phasenanschnittsteuerung

Publications (2)

Publication Number Publication Date
EP3419389A1 true EP3419389A1 (fr) 2018-12-26
EP3419389B1 EP3419389B1 (fr) 2020-09-02

Family

ID=62562946

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EP18174807.0A Active EP3419389B1 (fr) 2017-06-21 2018-05-29 Commande de phase realisée par interruption

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EP (1) EP3419389B1 (fr)
DE (1) DE102017113637A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113257199B (zh) * 2020-06-01 2022-07-08 海信视像科技股份有限公司 背光驱动电路、方法及显示设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1949699A1 (de) * 1969-10-02 1971-04-15 Hsl Elektronische Schaltgeraet Spannungswaehler zur Einstellung der Betriebsspannung von Drehstromverbrauchern,z.B. Drehstrommotoren
DE2119950C3 (de) * 1971-04-23 1975-06-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Funk-Entstördrossel
DE2721967A1 (de) * 1977-05-14 1978-11-16 Vogt Gmbh & Co Kg Funkenstoerdrosseln fuer phasenanschnittgesteuerte halbleiterschaltungen
DE19528873A1 (de) * 1995-08-05 1997-02-06 Volker Petschick Helligkeitssteuergerät für Bühnenbeleuchtungen

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Magnetic core - Wikipedia", WIKIPEDIA, 5 June 2017 (2017-06-05), pages 1 - 8, XP055514410, Retrieved from the Internet <URL:https://en.wikipedia.org/w/index.php?title=Magnetic_core&oldid=783992097#Sendust,_KoolMU> [retrieved on 20181011] *
ANONYMOUS: "STEVAL-ILD003V1 - Analog wall dimmer for CFL/LED lamps based on the TS820 (EU version 220 V)", 1 February 2013 (2013-02-01), pages 1 - 4, XP055514395, Retrieved from the Internet <URL:https://www.st.com/resource/en/data_brief/steval-ild003v1.pdf> [retrieved on 20181011] *
ANONYMOUS: "UM1512 User manual Contents - Doc ID 022738 Rev 2", 28 February 2013 (2013-02-28), pages 1 - 15, XP055514448, Retrieved from the Internet <URL:https://www.st.com/content/ccc/resource/technical/document/user_manual/fb/85/0b/06/a7/ae/48/21/DM00047288.pdf/files/DM00047288.pdf/jcr:content/translations/en.DM00047288.pdf> [retrieved on 20181011] *

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DE102017113637A1 (de) 2018-12-27
EP3419389B1 (fr) 2020-09-02

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