DE102015207433A1 - Operating circuit, luminaire and method for detecting a control signal - Google Patents

Operating circuit, luminaire and method for detecting a control signal

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Publication number
DE102015207433A1
DE102015207433A1 DE102015207433.1A DE102015207433A DE102015207433A1 DE 102015207433 A1 DE102015207433 A1 DE 102015207433A1 DE 102015207433 A DE102015207433 A DE 102015207433A DE 102015207433 A1 DE102015207433 A1 DE 102015207433A1
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DE
Germany
Prior art keywords
power factor
factor correction
phase
correction circuit
operating circuit
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.)
Pending
Application number
DE102015207433.1A
Other languages
German (de)
Inventor
Reinhard Böckle
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
Priority to DE102015207433.1A priority Critical patent/DE102015207433A1/en
Publication of DE102015207433A1 publication Critical patent/DE102015207433A1/en
Application status is Pending legal-status Critical

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B37/00Circuit arrangements for electric light sources in general
    • H05B37/02Controlling
    • H05B37/0209Controlling the instant of the ignition or of the extinction
    • H05B37/0245Controlling the instant of the ignition or of the extinction by remote-control involving emission and detection units
    • H05B37/0263Controlling the instant of the ignition or of the extinction by remote-control involving emission and detection units linked via power line carrier transmission
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials
    • H05B33/0806Structural details of the circuit
    • H05B33/0809Structural details of the circuit in the conversion stage
    • H05B33/0815Structural details of the circuit in the conversion stage with a controlled switching regulator
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials
    • H05B33/0842Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control
    • H05B33/0845Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control of the light intensity

Abstract

An operating circuit for a lighting device (52) comprises an input (60) for receiving a supply voltage, a power factor correction circuit (62) and a control device (65) which is arranged to control the operating circuit (51) in response to control signals which are in phase cuts and / or phase portions of the supply voltage are encoded. The control device (65) is set up to detect a phase angle and / or phase section depending on a behavior of the power factor correction circuit (62).

Description

  • Embodiments of the invention relate to an operating circuit for a luminous means and to a method for detecting a control signal. In particular, embodiments of the invention relate to operating circuits and methods in which control signals can be transmitted to the operating circuit in phase slices and / or phase sections of half-waves of a supply voltage.
  • Operating circuits for non-conventional bulbs, such as LED-based bulbs, serve to provide a supply voltage or a supply current for the light source. Examples of such operating circuits are LED converters. Additional functions may be integrated in such operating circuits. For example, the operating circuits may be configured to receive control signals over a supply line. Such control signals can be coded, for example, in phase sections and / or phase sections of half-waves of the supply voltage. By transmitting control signals via supply lines, the installation costs for the operating circuit or the lamp comprising them can be kept low.
  • Operating circuits such as LED converters may include a power factor correction circuit, also referred to in the art as a PFC ("Power Factor Correction") circuit. The power factor correction circuit is used to reduce or eliminate harmonic currents in an input current. Harmonic currents can occur, in particular in the case of non-linear consumers, such as, for example, rectifiers with subsequent smoothing in power supplies, since in such consumers the input current is shifted in phase and distorted in a non-sinusoidal manner despite the sinusoidal input voltage. The occurring higher-frequency harmonics can be counteracted by a power factor correction circuit upstream of the respective device.
  • The detection of control signals which are received at a supply input of the operating circuit, for example, by monitoring circuit, which monitors the input signal. Such monitoring circuits provided only for the purpose of detecting phase gating and / or phase sections increase the complexity, the cost and the installation space of the operating circuit.
  • Embodiments of the invention is based on the object of specifying improved operating circuits, luminaires and methods, which is set up for receiving control signals via a supply line. Embodiments of the invention are in particular the object of specifying such operating circuits, lights and methods that reduce the circuit complexity for the detection of phase cuts and / or phase sections.
  • According to embodiments, an operating device, a luminaire and a method with the features specified in the independent claims are provided. The dependent claims define embodiments.
  • According to exemplary embodiments, an operating circuit has a power factor correction circuit. For detecting phase gates and / or phase sections, an information present in the power factor correction circuit is evaluated. This makes it possible to exploit the fact that the performance of the power factor correction circuit, for example the time-dependent clocked switching of a controllable switch of the power factor correction circuit, depends on whether or not a half-wave of the supply voltage has a phase angle and / or phase portion.
  • The information about the performance of the power factor correction circuit may be provided by a control loop of the power factor correction circuit. A control device of the operating device can evaluate the information, which can be contained, for example, in one or two bits, in order to detect whether or not a half-wave of the supply voltage has a phase angle and / or phase section.
  • For example, in response to the detection of a control signal that may be transmitted in one or more phase slices and / or phase slices, the operating circuit may initiate a dimming operation, a color control process or a transmission of status information.
  • According to one embodiment, an operating circuit for a light source is specified. The operating circuit may be configured for use with a lighting device comprising at least one light emitting diode (LED). The operating circuit comprises an input for receiving a supply voltage, a power factor correction circuit and a control device. The control device is set up to control the operating circuit as a function of control signals which are coded in phase sections and / or phase sections of the supply voltage. The control device is set up in dependence on a behavior of the power factor correction circuit to detect a phase angle and / or phase portion.
  • The power factor correction circuit may include a controllable switch. The control device can be set up to detect the phase angle and / or phase section as a function of a time interval of switching operations of the controllable switch of the power factor correction circuit.
  • The power factor correction circuit may include the topology of a boost converter, a flyback converter, or other converter topology. The controllable switch can be clocked to cause a reduction in total harmonic distortion (THD).
  • The controllable switch may be clocked to store energy in an inductance of the power factor correction circuit and to discharge it from the inductance into a capacitor.
  • The control device can be set up to detect the phase angle and / or phase section as a function of information about a parameter of the power factor correction circuit.
  • The parameter may be dependent on a on- time during which the controllable switch of the power factor correction circuit is switched to an on state. Alternatively or additionally, the parameter may be dependent on a T off time during which the controllable switch of the power factor correction circuit is switched to an on state. Alternatively or additionally, the parameter may be dependent on a switching cycle duration of the controllable switch of the power factor correction circuit. This can be used to detect the phase angle and / or the phase section that the switching on and off of the controllable switch power factor correction circuit to reduce the THD takes place with a timeout that depends on the amount of supply voltage.
  • The power factor correction circuit may be configured to change the parameter at least at a power source correction power supply zero. A control loop of the power factor correction circuit may automatically adjust the parameter depending on the magnitude of the supply voltage. The logical information as to whether the supply voltage is only close to zero for a duration corresponding to a normal zero crossing of the supply voltage, or for a duration near zero, which is prolonged due to the phase angle and / or the phase portion, may be determined by the controller used to detect the control signal.
  • The control device may be configured to detect the phase angle and / or phase section as a function of a duration while the parameter at the zero point of the supply voltage is changed
  • The power factor correction circuit may be configured to increase the on- time if an amount of the supply voltage is less than a voltage threshold.
  • The power factor correction circuit may be configured to increase the on- time using at least one map defining changes in the on- time depending on the current value of the supply voltage.
  • The control device may be configured to detect the phase angle and / or phase section as a function of a duration during which the on time is increased.
  • The control device may be configured to detect the phase angle and / or phase section as a function of at least one state signal of the power factor correction circuit.
  • The at least one status signal may indicate or it may be possible to derive from the at least one status signal whether the duration is less than or greater than a time threshold value.
  • The power factor correction circuit may include a semiconductor integrated circuit for controlling the controllable switch configured to generate the at least one status signal.
  • The at least one state signal may be represented by at least two bits of a memory device of the operating circuit.
  • The at least two bits may be set by the semiconductor integrated circuit of the power factor correction circuit.
  • The control device can be set up to detect for a plurality of half-waves of the supply voltage in each case whether there is a phase section and / or a phase section in order to receive a control signal coded in a binary sequence.
  • The control device may be configured to detect for a plurality of half-waves of the supply voltage in each case depending on the behavior of the power factor correction circuit, which angle corresponds to the phase angle and / or phase section.
  • The control device can be set up to execute a dimming operation as a function of the control signals.
  • The control device may alternatively or additionally be configured to execute a color control depending on the control signals.
  • The control device may alternatively or additionally be set up to start a transmission of status information depending on the control signals.
  • The operating circuit may include a converter connected to the power factor correction circuit. The controller may be configured to control the converter in response to the control signals.
  • The converter can be a DC / DC converter. The converter may have a galvanic isolation.
  • The operating circuit may be an LED converter.
  • A luminaire according to an embodiment comprises a luminous means which comprises at least one light-emitting diode, and an operating circuit according to an embodiment which is connected to the lighting means.
  • A system according to an embodiment comprises an operating circuit or a light according to an embodiment and a device for generating control signals.
  • The means for generating the control signals may be a dimmer, which may have a manually operable adjustment.
  • The means for generating the control signals may comprise a control unit for brightness and / or color control. The control unit may generate the control signals in response to user input to a user interface and / or automatically.
  • According to an exemplary embodiment, a method is provided for detecting a control signal that is coded in phase sections and / or phase sections of a supply voltage of an operating circuit for a lighting device, wherein the operating circuit comprises a power factor correction circuit. The method comprises detecting a phase angle and / or a phase portion depending on a behavior of the power factor correction circuit. The method comprises controlling the operating circuit depending on the detected phase angle and / or phase portion.
  • The method may be automatically performed by the operating circuit or the light according to an embodiment.
  • In the method, the power factor correction circuit may include a controllable switch. The detection of the phase angle and / or of the phase section may be effected in dependence on a time lapse of switching operations of the controllable switch of the power factor correction circuit.
  • In the method, the power factor correction circuit may include the topology of a boost converter, a flyback converter, or other converter topology. The controllable switch can be clocked to cause a reduction in total harmonic distortion (THD).
  • The method may include clocking the controllable switch to store energy in an inductor of the power factor correction circuit and to discharge it from the inductor into a capacitor.
  • The detection of the phase angle and / or the phase section may be effected in dependence on information about a parameter of the power factor correction circuit.
  • In the method, the parameter may be dependent on a on- time during which the controllable switch of the power factor correction circuit is switched to an on state. Alternatively or additionally, the parameter may be dependent on a T off time during which the controllable switch of the power factor correction circuit is switched to an off state. Alternatively or additionally, the parameter may be dependent on a switching cycle duration of the controllable switch of the power factor correction circuit. As a result, it can be used in the method for detecting the phase angle and / or the phase section that the switching on and off of the controllable switch power factor correction circuit for reducing the THD takes place with a timeout that depends on the magnitude of the supply voltage.
  • In the method, the power factor correction circuit may change the parameter at least at a power source correction power supply zero. A control loop of the power factor correction circuit can automatically adjust the parameter depending on the amount of supply voltage. The logical information as to whether the supply voltage is only close to zero for a duration corresponding to a normal zero crossing of the supply voltage, or for a duration near zero, which is prolonged due to the phase angle and / or the phase portion, may be used in the method used to detect the control signal.
  • In the method, depending on a duration during which the parameter is changed at the zero point of the supply voltage, the phase angle and / or phase portion can be detected
  • In the method, the power factor correction circuit may increase the on- time if an amount of the supply voltage is less than a voltage threshold.
  • In the method, using at least one map that defines changes in the on- time dependent on the current value of the supply voltage, the on- time from the power factor correction circuit may be increased.
  • In the method, depending on a duration during which the T on time is increased, the phase angle and / or the phase portion can be detected.
  • In the method, the phase angle and / or phase section can be detected as a function of at least one state signal of the power factor correction circuit.
  • In the method, the at least one status signal may indicate whether the duration is less than or greater than a time threshold.
  • In the method, it can be derived from the at least one status signal whether the duration is smaller or larger than a time threshold value.
  • In the method, the power factor correction circuit may include an integrated semiconductor circuit for controlling the controllable switch configured to generate the at least one status signal.
  • In the method, the at least one state signal may be represented by at least two bits of a memory device of the operating circuit.
  • In the method, the at least two bits may be set by the semiconductor integrated circuit of the power factor correction circuit.
  • In the method, it can be detected in each case for a plurality of half-waves of the supply voltage, whether there is a phase section and / or a phase section in order to receive a control signal coded in a binary sequence.
  • In the method, it can be detected in each case for a plurality of half-waves of the supply voltage, depending on the behavior of the power factor correction circuit, to which angle the phase angle and / or phase section corresponds.
  • The control of the operating circuit may include a dimming operation that depends on the control signal.
  • The controlling of the operating circuit may alternatively or additionally comprise a color control which depends on the control signal.
  • The control of the operating circuit may alternatively or additionally include transmission of status information that depends on the control signal.
  • The operating circuit may include a converter connected to the power factor correction circuit. In the method, the converter can be controlled depending on the control signals.
  • In the method, the converter may be a DC / DC converter. The converter may have a galvanic isolation.
  • The operating circuit may be an LED converter.
  • The method may include providing an LED current to the light emitting device comprising at least one LED.
  • The method may include generating the control signal.
  • The control signal can be generated by a dimmer, which may have a manually operable adjustment.
  • The control signal can be generated by a control unit for brightness and / or color control. The control unit may generate the control signals in response to user input to a user interface and / or automatically.
  • In operating circuits, lights and methods according to embodiments, a phase angle and / or phase portion can be detected depending on logical information that is present in the power factor correction circuit. The Complexity of the components of the operating circuit required for the detection of phase cuts and / or phase sections can be kept low.
  • The invention will be explained below with reference to the drawings with reference to preferred embodiments, wherein identical or similar reference numerals designate identical or similar units.
  • 1 shows a system with an operating circuit according to an embodiment.
  • 2 shows a circuit diagram of a power factor correction circuit of an operating circuit according to an embodiment.
  • 3 is a schematic representation of a control signal for a controllable switch of the power factor correction circuit for explaining the operation of the operating circuit according to an embodiment.
  • 4 is a schematic representation of a control signal for a controllable switch of the power factor correction circuit for explaining the operation of the operating circuit according to an embodiment.
  • 5 is a schematic representation of a state signal of the operating circuit for explaining the operation of the operating circuit according to an embodiment.
  • 6 FIG. 12 is a block diagram for explaining the operation of the operation circuit according to embodiments. FIG.
  • 7 FIG. 12 is a block diagram for explaining the operation of the operation circuit according to embodiments. FIG.
  • 8th is a diagram for explaining the operation of the operation circuit according to embodiments.
  • 9 is a diagram for explaining the operation of the operation circuit according to embodiments.
  • 10 FIG. 10 is a flowchart of a method performed by an operation circuit according to an embodiment. FIG.
  • 11 illustrates a control signal transmitted in a sequence of half-waves.
  • 12 shows a lamp according to an embodiment.
  • Embodiments will now be described with reference to the figures, in which identical or similar reference numerals designate identical or similar elements. The features of the embodiments may be combined with each other unless expressly excluded in the following description.
  • Although embodiments are described in the context of transmission of control signals that control an operation circuit to trigger a dimming operation, a color control or a transmission of status information by the operation circuit, the embodiments are not limited to these applications. Embodiments may be used generally when an operating circuit includes a power factor correction circuit and is adapted for transmission of signals via power lines (PLC).
  • 1 shows a block diagram representation of a system 1 that is an operating circuit 51 for a light source 52 includes. The light source 52 can one or more light emitting diodes (LEDs) 53 include. The LEDs may include inorganic LEDs and / or organic LEDs.
  • The system 1 can be a device 15 for generating control signals. The system 1 includes a supply source 10 , A light 50 that the operating circuit 51 is covered by the device 12 controlled. This may be the device 15 a control signal, which may be encoded analog or digital, transmitted via a load line. The device 15 can be configured to generate at least one phase angle and / or a phase portion of a half-wave of a supply voltage of the operating circuit for generating the control signal 51 to create.
  • The device 15 can for brightness control of the operating circuit 51 serve and designed as a dimming device, which is an actuatable adjusting element 16 includes. The device 15 can be configured as a control unit for color and / or brightness control unit. The device 15 may include a user interface for generating control signals in response to an operation of the user interface. The device 15 may alternatively or additionally be arranged to automatically generate control signals, for example for a brightness control.
  • One from the mains voltage source 10 outgoing mains voltage conductor 11 is with the light 50 connected. Another from the mains voltage source 10 outgoing mains voltage conductor 12 is with the device 15 connected. In which Line voltage conductor 11 it can be a neutral, while the mains voltage 12 is a phase conductor. The device 15 is via a load line 13 with the light 50 connected. The lamp 50 is with the mains voltage conductor 11 and the load line 13 coupled and takes its supply voltage via the load line 13 and the mains voltage conductor 11 on. The supply voltage of the operating circuit 51 this is on the one hand the mains voltage conductor 11 and on the other hand via the mains voltage conductor 12 , the load ladder 13 and the device coupled therebetween 15 fed. The device 15 can be connected in such a way that it is only connected to one of the mains voltage conductors 1 . 12 directly connected.
  • The lamp 50 includes the operating circuit 51 and the bulb 52 , The light source 52 can one or more light emitting diodes (LEDs) 53 include. Accordingly, the operation circuit 51 be designed as an LED converter. The light source 52 can be implemented in various ways, eg by one or more inorganic LEDs, organic LEDs or other bulbs. In addition, a combination of the aforementioned types of lamps can be used. About the operating circuit 51 a suitable operation of the respective light source takes place 52 , For this purpose, the operating circuit 51 For example, comprise a power supply, which from one of the lamp supplied supply voltage for the operation of the lamp 52 generates a suitable voltage and / or current.
  • A control device 65 the operating circuit 51 can implement the control signals to a brightness and / or color of the bulb 52 depending on the control signals to control. Alternatively or additionally, the control device 65 convert the control signals to a transmission of status information through the operating circuit 51 to start.
  • As will be described in more detail below, the controller is 65 set up to be dependent on a power factor correction circuit behavior 62 to detect whether a half-wave of the supply voltage in each case has a phase angle and / or a phase portion. For this purpose, the control device 65 logical information of a control loop of the power factor correction circuit 62 use.
  • The control device 65 For example, depending on how a controllable switch 71 the power factor correction circuit is switched, detect whether a half-wave without phase angle and without phase section is present or whether the respective half-wave has a phase angle and / or phase section.
  • The behavior of the power factor correction circuit 62 can provide in different ways a logical information indicating whether a phase angle and / or a phase section is present. For example, from a time-dependent T on -Zeit, while the controllable switch 71 the power factor correction circuit 62 is switched to an on state, it can be determined whether a phase angle and / or a phase section is present. Alternatively or additionally, from a time-dependent T off time, while the controllable switch 71 the power factor correction circuit 62 is switched to an off state, it can be determined whether a phase angle and / or a phase section is present. Alternatively or additionally, from a time-dependent switching cycle duration for the controllable switch 71 the power factor correction circuit 62 be determined whether a phase angle and / or a phase section is present.
  • The change in the T on time and / or the T off time may be provided by the power factor correction circuit 62 be made automatically depending on the supply voltage to further reduce the THD. For example, the power factor correction circuit 62 increasing the on time over a T on threshold value when the magnitude of the supply voltage is greater than a voltage threshold. The power factor correction circuit 62 the T on time, and / or the T off time can, for example, map-based dependent change over time depending on the supply voltage.
  • The operating circuit 51 can be a rectifier 61 , the power factor correction circuit 62 and a DC / DC converter 63 exhibit. An output driver 64 can in the operating circuit 51 or in the bulb 52 be provided. The power factor correction circuit 62 provides an output voltage for downstream components of the operating circuit 51 ready, which is also referred to as bus voltage V bus . Another voltage conversion and / or dimming functions, for example via the DC / DC converter 63 , which may be configured as LLC resonant converter, and / or the output driver 64 be achieved. The control device 65 can fulfill various control or regulation functions.
  • The operation of the operating circuit 51 According to embodiments, with reference to 2 - 12 described in more detail. While in 1 schematically an operating circuit is shown, in which the power factor correction circuit 11 provides a bus voltage to other components of the operating circuit, the Detection of phase gating and / or phase sections according to embodiments can also be used in an isolated power factor correction circuit with a downstream driver stage.
  • 2 is a circuit diagram of components of the operating circuit 51 according to an embodiment. A supply alternating voltage U s , for example the mains voltage, can optionally be smoothed and rectified by the rectifier 61 converted into a rectified AC voltage, the input voltage U IN at the input of the power factor correction circuit 62 is applied. While in 2 an example of one of the power factor correction circuit 62 with up-converter topology, any other can
  • The input voltage U IN becomes an inductance 72 the power factor correction circuit 62 fed, which may include a coil. A resistance 73 at the input of the power factor correction circuit is also shown schematically. The inductance 72 is with a diode 74 between the input terminal and an output terminal of the power factor correction circuit 62 connected in series. At that with an output capacitor 76 coupled output terminal of the power factor correction circuit 62 a DC voltage V bus is provided which is used to supply a load, for example the DC / DC converter 63 with the bulbs connected on the output side 52 , serves.
  • To a node between the inductor 72 and the diode 74 is the controllable switch 71 connected. The controllable switch 71 can have a shunt resistance 75 connected to ground. The desk 71 is a controllable electronic switch. The desk 71 may be an insulated gate switch. The desk 71 can for example be designed as a field effect transistor (FET), in particular as a MOSFET. The desk 71 Clocked is switched to the on state and the off state to reduce the total harmonic distortion (THD).
  • In the switched-on state of the switch 71 is the inductance 72 over the switch 71 connected to ground, the diode 74 locks so that the inductance 72 charged and energy in inductance 72 is stored. Is, however, the switch 71 off, ie open, is the diode 74 conductive, so that the inductance 72 over the diode 74 in the output capacitor 76 can discharge and in the inductance 72 stored energy in the output capacitor 76 is transmitted.
  • The desk 71 can be controlled according to a control or regulation loop. A semiconductor integrated circuit 70 or another switch controller may be separate from the controller 65 be provided. It is also possible the function of the switch control and the control device 65 to combine in a single integrated circuit.
  • The semiconductor integrated circuit 70 For example, it can be configured as an application-specific special circuit (ASIC). The power factor correction is made by repeatedly turning the switch on and off 71 achieved, with the switching frequency for the switch 71 is much larger than the frequency of the rectified input AC voltage U IN . The power factor correction circuit 62 can work as an up-converter, but can also have a different transducer topology.
  • The control of the controllable switch 71 can be done depending on an amount and optionally depending on a sign of the time derivative of the input voltage U IN of the power factor correction circuit. For example, the control of the controllable switch 71 such that a T on- time, during which the controllable switch is switched to an on state in a switching cycle, is selectively increased when the magnitude of the supply voltage U s is less than a voltage threshold. Alternatively or additionally, a T off time, during which the controllable switch is switched to an off state in a switching cycle, and / or a switching cycle duration for the controllable switch 71 be changed in a manner that depends on the current value of the amount of the supply voltage U s .
  • An adaptation of the control of the controllable switch 71 To reduce the THD may be from a control loop of the power factor correction circuit 62 be executed automatically. For this purpose, the input voltage U IN via an ohmic voltage divider 81 . 82 be monitored. Optionally, the bus voltage V bus via another Ohmic voltage divider 83 . 84 be monitored.
  • Depends on a behavior of the power factor correction circuit 62 Phase cuts and / or phase sections can be detected. The detection of phase gates and / or phase sections can be done, for example, depending on how switching cycles for the controllable switch 71 change while a half-wave of the supply voltage is received.
  • The in the power factor correction circuit 62 existing logical information, when at least one parameter for the switching behavior of the controllable switch 71 is adapted in a certain way, can be used to detect phase slices and / or phase sections. Of the Parameter may, for example, be the T on- time generated by the semiconductor integrated circuit 70 is automatically increased when the supply voltage U s has a zero. Alternatively or additionally, a change in another parameter can be monitored for the detection of phase cuts and / or phase sections, for example a change in the T off time, the switching cycle duration or the ratio of T on- time to T off time, which of the integrated semiconductor circuit 70 is made at the time when the supply voltage U s has a zero point or its amount is smaller than the voltage threshold.
  • Depending on the duration of the on- time, the off- time, a switching cycle duration or any other parameter that determines the performance of the power factor correction circuit 62 is changed in a half-wave in a manner characteristic of small supply voltage values, it can be determined whether the respective half-wave has a phase angle and / or a phase portion.
  • For example, if the on time for the controllable switch 71 is selectively increased when the supply voltage has an amount less than a voltage threshold, the duration in which there is an increase in T on- time compared to that duration can be used to phase cut and / or Detecting phase sections. For example, a time threshold may be defined to be greater than or equal to the duration for which a half-wave of the supply voltage without phase-angle and without phase-phase is less than the voltage threshold. If the duration in which there is an increase in the T on time is greater than the time threshold, the presence of a phase angle or phase section can be concluded.
  • Similarly, a change in the T off time or the switching cycle duration of the controllable switch 71 , which are made dependent on the amount of the supply voltage time-dependent, can be used to detect a phase angle and / or phase portion.
  • 3 illustrates an exemplary change in the course of a switching cycle of the controllable switch 72 as stated by the power factor correction circuit 62 can be implemented to reduce the THD. It is in 3 the performance of the power factor correction circuit shown when no phase angle and no phase section is present.
  • 3 shows a control signal 91 for switching the controllable switch 71 , The control signal 91 can from the semiconductor integrated circuit 70 be generated. 3 also shows the course of an amount of the supply voltage | U s | 94 ,
  • For values of the supply voltage, their amount 94 can be close to the amplitude of the supply voltage or greater than a voltage threshold, the controllable switch 71 each for a T on time 92 be switched to the on state. The controllable switch 71 remains a T off time 96 in the off state, before turning it back on.
  • For values of the supply voltage, their amount 94 is less than a voltage threshold, the controllable switch 71 each for a T on time 93 be switched to the on-state that is greater than the on- time 92 , The controllable switch 71 remains a T off time 97 in the off state, before turning it back on. The T off time 97 can equal the T off time 96 be or may be different from this.
  • If there is no phase gating and no phase section, this is a first duration 95 in which the on time is the higher value 93 determined by how long the amount of the supply voltage is less than the voltage threshold.
  • If there is a phase cut or phase cut, the duration in which the on time increases to the higher value 93 as shown by 4 will be described in more detail.
  • 4 illustrates an exemplary change in the course of a switching cycle of the controllable switch 72 as stated by the power factor correction circuit 62 can be implemented to reduce the THD. It is in 4 the behavior of the power factor correction circuit shown when a phase angle is present.
  • 4 shows a control signal 101 for switching the controllable switch 71 , The control signal 101 can from the semiconductor integrated circuit 70 be generated. 4 also shows the course of an amount of the supply voltage | U s | 104 , Due to the phase angle 106 The amount of the supply voltage | U s | lingers 104 longer at low voltage values.
  • For values of the supply voltage, their amount 104 is less than the voltage threshold, the controllable switch 71 each for a T on time 93 be switched to the on-state that is greater than the on- time 92 for larger amounts of supply voltage. As a phase control 106 is present, is a second duration 105 in which the on time is the higher value 93 longer than the first duration 95 , if there is no phase angle and phase phase.
  • By monitoring the time duration in which the on time, the off time or another parameter such as the switching cycle duration of the controllable switch 71 to reduce the THD is changed because the amount of supply voltage | U s | is small, it can be determined whether a phase angle and / or a phase section is present.
  • Even if in 3 and 4 By way of example, the mode of operation of the operating circuit according to an exemplary embodiment in connection with a selective increase in the on time for small amounts of the supply voltage has been explained, corresponding techniques can also be used if the off- time or a switching cycle duration 98 . 99 depending on the amount of supply voltage | U s | will be changed.
  • 5 shows a sequence of half waves 112 - 114 the supply voltage 111 , A half wave 112 has no phase gating and no phase section. Another half-wave 113 has a phase angle 115 on. Another half-wave 114 has a phase angle 116 on.
  • The power factor correction circuit 62 can be set up such that a parameter, eg the T on time of the controllable switch 71 is changed while the amount of the supply voltage is smaller than a voltage threshold, that is, the supply voltage in a range 119 lies.
  • 5 also shows a logical value L inc which indicates whether there is an increase in the on time each time. For half-waves without phase angle and phase section, the T on time is in each case during a first duration 95 elevated. For half waves 113 . 114 with phase gating 115 . 116 or phase portion becomes the T on time each for a second duration 105 increases that are longer than the first duration 95 is.
  • Depending on the time duration in which the T on time each by the power factor correction circuit 62 is increased, half-waves can be distinguished without phase control of half-waves with phase control. Depending on the time duration in which the T on time each by the power factor correction circuit 62 is increased, half-waves without phase section of half-waves with phase section can be distinguished.
  • Information about the behavior of the power factor correction circuit 62 can be done in different ways by the controller 65 be recorded. For example, the power factor correction circuit 62 a signal 121 as it is in 5 is shown. The signal 121 can from the semiconductor integrated circuit 70 the power factor correction circuit 62 to be provided. The signal 121 may have different signal levels to indicate whether the on time is just increased to decrease the THD or not. The signal 121 can from the controller 131 be evaluated.
  • Through a control loop of the power factor correction circuit 62 It is also possible to set at least one flag which indicates whether an increase in the on time with a first duration 95 as by the pulse 122 or an increase in the on time with a second longer duration 105 as through the pulses 125 . 126 is present. The control device can process this information further.
  • A distinction of half-waves with phase control or phase section of half-waves without phase angle and phase section can not only be made dependent on the change in T on time. For example, such a discrimination may also be made when the T off time or a switching cycle duration by the power factor correction circuit 62 depending on the amount of supply voltage | U s | is changed, so that it can be determined how long the amount of supply voltage | U s | is less than a voltage threshold.
  • 6 illustrated in a block diagram 130 as the operating circuit 50 According to one embodiment, in a PFC controller or controller can use existing logical information to detect phase cuts and / or phase sections. A PFC control 131 can be a signal, for example 121 indicating when the on- time or other parameter of the power factor correction circuit 62 to reduce the THD is changed. A detection component 132 can the signal 121 evaluate in each case to determine for each half-wave of the supply voltage, whether it has a phase angle and / or a phase portion. For this purpose, the duration in which the T on time is changed in each case can be compared with a time threshold value which distinguishes the first duration 95 from the second duration 105 allowed.
  • The PFC control 131 and the detection component 132 can in different elements of the operating circuit 51 be implemented. For example, the PFC control 131 in the semiconductor integrated circuit 70 the power factor correction circuit 62 be implemented. The detection component 132 can in the control device 65 be implemented. The PFC control 131 and the detection component 132 can also be combined in only one semiconductor integrated circuit.
  • 7 illustrated in a block diagram 130 as the operating circuit 50 According to one embodiment, in a PFC controller or controller can use existing logical information to detect phase cuts and / or phase sections. A PFC control 131 For example, it may set at least one flag, that of the detection component 132 is evaluated.
  • The operating circuit 51 can store at least one bit 133 . 134 include in which the PFC scheme 131 can set a flag. For example, the PFC control 131 set a flag indicating that a half-wave is an increase in T on- time by the first duration 95 through the power factor correction circuit 62 causes. The PFC control 131 may alternatively or additionally set a flag indicating that a half wave is increasing the T on time by the second duration 105 through the power factor correction circuit 62 causes, so that a phase angle or phase section is detected.
  • By combining two flags, a first flag of which is the presence or absence of an increase in the on time by the first duration 95 through the power factor correction circuit 62 and a second flag of which indicates the presence or absence of an increase in the on- time by the second duration 105 through the power factor correction circuit 62 indicates that the error rate can be reduced.
  • The flag or flags may be from the detection component 132 be read out.
  • As for 6 can also be described in the implementation of 7 the PFC regulation 131 and the detection component 132 in different elements of the operating circuit 51 be implemented. For example, the PFC control 131 in the semiconductor integrated circuit 70 the power factor correction circuit 62 be implemented. The detection component 132 can in the control device 65 be implemented. The PFC control 131 and the detection component 132 can also be combined in only one semiconductor integrated circuit.
  • Embodiments of the invention can be used both when a parameter of the power factor correction circuit, for example the T on time and / or the T off time for the controllable switch 71 is changed stepwise, as well as when the T on time and / or the T off time is changed continuously as a function of the magnitude of the supply voltage.
  • Even if in 6 and 7 an example of a PFC controller 131 can be shown instead of the PFC controller 131 Also a PFC control can be used.
  • 8th shows by way of example a step-like change in T on- time 140 through the power factor correction circuit 62 when the amount of supply voltage is a voltage threshold 141 below. The logical information as to when or for what duration the T on time is increased in each case can be determined by the control device 65 be used to detect half-waves with a phase angle and / or a phase section.
  • 9 shows by way of example a steady change in the on time 145 through the power factor correction circuit 62 as a function of the amount of the supply voltage. In this case, you can still set the duration in which the on time 145 for a half-wave of the supply voltage leading to a voltage threshold 145 T on time falls short, can be used to detect the presence of phase slices and / or phase sections.
  • 10 is a flowchart of a method 150 , The procedure 150 can from the operating circuit 51 be carried out automatically according to one embodiment. The procedure 150 can be executed depending on a behavior of the power factor correction circuit 62 for each of a plurality of half-waves to determine whether the half-wave has in each case a phase angle and / or a phase portion.
  • At step 151 becomes a behavior of a power factor correction circuit 62 detected. Capturing the behavior may be evaluating a signal 121 which indicates when each one parameter of the power factor correction circuit 62 is selectively changed depending on the amount of the supply voltage. Detecting the behavior may include evaluating at least one flag received from the power factor correction circuit 62 is set.
  • At step 152 can be determined if the behavior of the power factor correction circuit 62 is characteristic of a half-wave with a phase angle and / or phase section. For example, a duration in which the on time, the off time, or another parameter for reducing the THD is reduced may be compared to a time threshold.
  • At step 153 For example, the transmitted control signal can be selectively decoded from the phase gating and / or phase section if there is a phase-angle and / or phase-phase half-wave.
  • The procedure can be used to step 151 to return.
  • 11 illustrates how the operating circuit 51 Phase sections can evaluate to decode a control signal.
  • One at the operating circuit 51 the lamp voltage supply 160 has several half waves 161 - 168 on. Several of the half-waves have phase sections. The phase sections are from the device 14 generated so that, for example, by the presence or absence of a phase section in a half-wave, a logical "0" or a logical "1" can be encoded. A first half-wave 161 the sequence of half waves can be a phase section 171 exhibit. As a result, a start bit of a data packet can be coded. At least one half-wave 168 the sequence of half waves can be a phase section 178 to indicate the end of the data packet. For the intermediate half-waves 162 - 167 For example, phase sections may be selectively generated to transmit a dimming value, a color value, or another bit sequence. For example, with the phase sections 172 . 173 . 174 and 176 the half waves 162 . 163 . 164 and 166 in each case one bit value, eg a logical "1", are coded. Due to the lack of phase sections 175 and 177 at the other half-waves 165 and 167 In each case, another bit value, for example a logical "0", can be coded. Other embodiments are possible. For example, instead of a target value for a brightness or a color that is to be approached by the operating device in a cross-fading process, only information about it in the data packet is transmitted as to whether a brightness value, a color value or another control variable should be incremented or decremented.
  • The evaluation circuit, which monitors the received supply voltage for the presence of phase gates and / or phase sections, is in the operating circuit 51 so implemented that information about the behavior of the power factor correction circuit 62 is used to infer the presence or absence of phase gates and / or phase sections, respectively. The operating circuit 51 can detect the start of a data packet based on at least one phase gating or phase section. The operating circuit 51 can determine the control command transmitted with the data packet, for example a target value of a manipulated variable. The operating circuit 51 Sets the control command, for example, by approaching the target value of the manipulated variable with a transition time. If an instruction for incrementing or decrementing the manipulated variable, which is coded in a sequence of phase sections and / or phase sections, is transmitted with the data packet, the operating circuit can 51 also perform a corresponding crossfade process.
  • Other exemplary control functions may be performed. For example, the operating circuit 51 Status information indicating the operating circuit 51 or the bulb 52 is transmitted in response to a control signal encoded in a sequence of phase slices and / or phase slices.
  • As in 11 shown schematically, phase sections or phase cuts can be generated both for half-waves with a positive sign and half-waves with a negative sign in the transmission of the data packet. In other embodiments, phase sections or phase cuts may be selectively generated only for halfwaves with a sign.
  • A variety of other embodiments may be used to generate and evaluate control signals. For example, control signals need not be encoded in a sequence of phase sections or phase slices. A manipulated variable or a change of a manipulated variable may, for example, also be coded in a length of a phase angle or phase section which is determined by the operating circuit as described above.
  • The operating circuit 51 and the bulb 52 according to embodiments may have different configurations. For example, a light 50 that the operating circuit 51 according to one embodiment, be designed as an LED lamp. The LED lamp can be a socket 161 and a translucent material 162 exhibit. The translucent material 162 can the bulbs 52 at least partially surrounded.
  • While embodiments have been described with reference to the figures, modifications may be made in other embodiments. For example, the functions of the control device 65 also be executed by several separate circuits.
  • While embodiments have been described in which the on- time is varied depending on an amount of the supply voltage, changes in other parameters of the power factor correction circuit depending on an amount of the supply voltage may also be used to detect phase cuts and / or phase portions. The T off time, a quotient of T on time and T off time or a switching cycle duration of the controllable switch 71 are exemplary of such parameters.
  • While embodiments have been described in which the power factor correction circuit includes the topology of a boost converter, the embodiments may also include other power factor correction circuit topologies. For example, the power factor correction circuit may be designed as a flyback converter.
  • Methods and devices according to embodiments can be used in operating devices for lighting, for example in an LED converter.

Claims (16)

  1. Operating circuit for a light source ( 52 ), comprising an entrance ( 60 ) for receiving a supply voltage ( 111 ; 160 ), a power factor correction circuit ( 62 ) and a control device ( 65 ), which is set up to provide the operating circuit ( 51 ) depending on control signals, which in phase intersections ( 115 . 116 ) and / or phase sections ( 171 . 172 . 176 . 178 ) of the supply voltage ( 111 ; 160 ), the control device ( 65 ) is adapted to be dependent on a behavior of the power factor correction circuit ( 62 ) a phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 176 . 178 ) to detect.
  2. Operating circuit according to claim 1, wherein the power factor correction circuit ( 62 ) a controllable switch ( 71 ), and wherein the control device ( 65 ) is arranged to be dependent on a timing of switching operations of the controllable switch ( 71 ) of the power factor correction circuit ( 62 ) the phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 176 . 178 ) to detect.
  3. Operating circuit according to claim 2, wherein the control device ( 65 ) is arranged to be dependent on information about a parameter of the power factor correction circuit ( 62 ) the phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 176 . 178 ), the parameter being dependent on a on- time ( 92 . 93 ) while the controllable switch ( 71 ) of the power factor correction circuit ( 62 ) is switched to an on state, a off time ( 96 . 97 ) while the controllable switch ( 71 ) of the power factor correction circuit ( 62 ) is switched to an off state, or a switching cycle duration ( 98 . 99 ) of the controllable switch ( 71 ) of the power factor correction circuit ( 62 ).
  4. Operating circuit according to claim 3, wherein the power factor correction circuit ( 62 ) is arranged to at least at a zero point of the supply voltage ( 111 ; 160 ) to modify the power factor correction.
  5. Operating circuit according to claim 4, wherein the control device ( 65 ) is set up to be dependent on a duration ( 95 . 105 ), while the parameter at the zero point of the supply voltage ( 111 ; 160 ), the phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 176 . 178 ) to detect.
  6. Operating circuit according to one of claims 3 or 4, wherein the power factor correction circuit ( 62 ) is set to the T on- time ( 92 . 93 ), when an amount of the supply voltage ( 111 ; 160 ) smaller than a voltage threshold ( 141 ), and wherein the control device ( 65 ) is set up to be dependent on a duration ( 95 . 105 ), during which the T on time is increased, the phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 176 . 178 ) to detect.
  7. Operating circuit according to claim 5 or claim 6, wherein the control device ( 65 ) is arranged to the phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 176 . 178 ) depending on at least one status signal ( 121 ) of the power factor correction circuit ( 62 ), wherein the at least one status signal ( 121 ) or from which at least one status signal can be derived, whether the duration ( 95 . 105 ) is less than or greater than a time threshold.
  8. Operating circuit according to claim 7, wherein the power factor correction circuit ( 62 ) an integrated semiconductor circuit ( 70 ) for controlling the controllable switch ( 71 ) arranged to receive the at least one status signal ( 121 ) to create.
  9. An operating circuit according to claim 7 or claim 8, wherein the at least one state signal is represented by at least two bits of a memory device ( 133 . 134 ) of the operating circuit ( 51 ) is represented.
  10. Operating circuit according to one of the preceding claims, wherein the control device ( 65 ) is set up for a plurality of half-waves ( 112 - 114 ; 161 - 168 ) of the supply voltage ( 111 ; 160 ) in each case to detect whether a phase section ( 171 . 172 . 176 . 178 ) and / or a phase section ( 171 . 172 . 176 . 178 ) is present to receive a control signal encoded in a binary sequence.
  11. Operating circuit according to one of the preceding claims, wherein the control device ( 65 ) is arranged to execute, in response to the control signals, an operation selected from a group consisting of: a dimming operation, a color control, and a transmission of status information.
  12. Operating circuit according to claim 11, comprising one with the power factor correction circuit ( 62 ) connected transducers ( 63 ), wherein the control device ( 65 ) is set up to the converter ( 63 ) depending on the control signals.
  13. Operating circuit according to one of the preceding claims, wherein the operating circuit ( 51 ) is an LED converter.
  14. Luminaire comprising a light source ( 52 ), the at least one light emitting diode ( 53 ) and an operating circuit according to one of the preceding claims, which is connected to the lighting means ( 52 ) connected is.
  15. Method for detecting a control signal that is used in phase gating ( 115 . 116 ) ( 115 . 116 ) and / or phase sections ( 171 . 172 . 176 . 178 ) of a supply voltage ( 111 ; 160 ) an operating circuit ( 51 ) for a light source ( 52 ), the operating circuit ( 51 ) a power factor correction circuit ( 62 ), the method comprising: detecting a phase angle ( 115 . 116 ) and / or a phase section ( 171 . 172 . 173 . 176 . 178 ) depending on a behavior of the power factor correction circuit ( 62 ), and controlling the operating circuit ( 51 ) depending on the detected phase angle ( 115 . 116 ) and / or phase section ( 171 . 172 . 173 . 176 . 178 ).
  16. Method according to claim 15, characterized by the operating circuit ( 51 ) according to one of claims 1 to 13 or of the luminaire ( 50 ) is carried out according to claim 14.
DE102015207433.1A 2015-04-23 2015-04-23 Operating circuit, luminaire and method for detecting a control signal Pending DE102015207433A1 (en)

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DE102015207433.1A DE102015207433A1 (en) 2015-04-23 2015-04-23 Operating circuit, luminaire and method for detecting a control signal
ATGM194/2015U AT16413U1 (en) 2015-04-23 2015-07-02 Operating circuit, luminaire and method for detecting a control signal
EP16166641.7A EP3086626B1 (en) 2015-04-23 2016-04-22 Operating circuit, lighting fixture and method for detecting a control signal

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DE60222550T2 (en) * 2001-06-28 2008-06-26 Vlaamse Instelling Voor Technologisch Onderzoek, Afgekort V.I.T.O. Method and device for load control of an electric power supply
US20080094003A1 (en) * 2004-07-21 2008-04-24 Koninklijke Philips Electronics, N.V. Color Adjustable Lamp
DE102011007229A1 (en) * 2010-04-30 2011-11-03 Infineon Technologies Austria Ag Dimmable LED power supply with power factor control
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EP3086626B1 (en) 2017-11-15
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