WO2013174209A1 - Forming circuit of three-section dimming control signals of fluorescent lamp ballast - Google Patents

Forming circuit of three-section dimming control signals of fluorescent lamp ballast Download PDF

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Publication number
WO2013174209A1
WO2013174209A1 PCT/CN2013/075243 CN2013075243W WO2013174209A1 WO 2013174209 A1 WO2013174209 A1 WO 2013174209A1 CN 2013075243 W CN2013075243 W CN 2013075243W WO 2013174209 A1 WO2013174209 A1 WO 2013174209A1
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Prior art keywords
line
dimming control
ballast
voltage
power supply
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PCT/CN2013/075243
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French (fr)
Chinese (zh)
Inventor
张华�
毛松领
杨建文
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上海阿卡得电子有限公司
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Publication of WO2013174209A1 publication Critical patent/WO2013174209A1/en

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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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation
    • 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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps

Definitions

  • the present invention relates to a dimming controller for an electronic ballast for fluorescent lamps for illumination, and more particularly to a control signal forming circuit for segment dimming.
  • ballasts that can normally illuminate fluorescent lamps
  • dimming ballasts have been developed which can control the brightness variation of fluorescent lamps.
  • the brightness control of a fluorescent lamp is achieved by changing the operating frequency of the electronic ballast that drives the fluorescent lamp to change the current flowing through the fluorescent lamp.
  • the core of the fluorescent dimming ballast can be attributed to a low-level DC control signal that controls the frequency of the ballast inverter. By controlling the oscillation frequency of the internal inverter of the ballast, the fluorescent lamp can be realized. Adjustment of brightness.
  • the form of the control signal also determines the form of dimming, that is, the change in brightness of the fluorescent lamp.
  • Fluorescent dimming is typically performed by applying a variable low level DC voltage, such as IV to 10V, to the frequency control circuit of the electronic ballast inverter. The high and low variations of the DC control level cause a corresponding change in the operating frequency of the ballast, so that the corresponding current flowing through the fluorescent lamp and the brightness of the illumination change.
  • the dimming of the electronic ballast of the fluorescent lamp can be divided into two types: a continuous dimming control mode from dark to bright or from bright to dark brightness, and a segmental dimming control mode in which the brightness is changed step by step.
  • the most common segmentation dimming is the so-called "two-stage” dimming and "three-segment” dimming. Only two brightness changes (bright (100% brightness level) and dark (such as 5% or 10% brightness level) are called two-stage dimming; and bright (100% brightness level), medium brightness (such as 50) % brightness level) and dark (such as 5% or 10% brightness level) The three brightness level changes are called three-stage dimming.
  • the continuously varying dimming control signal voltage achieves the effect of bright and dark continuous dimming; the dimming control signal voltage that produces the grading level enables segmental dimming.
  • the two-stage dimming mode is realized by forming two high-level and low-level control signals; the three-stage dimming mode is realized by forming three levels of high, medium and low control signals.
  • ballast AC power input line There is a combination of four on-off states of two single-pole switches connected to the ballast AC power input line. Through photoelectric coupling and digital-to-analog conversion, three levels of three control levels, high, medium, low and zero, are output. Light ballast. There are also dedicated integrated circuits for segmented dimming.
  • the technical problem to be solved by the present invention is to provide a fluorescent lamp ballast that is connected with a ballast by three lines of a power supply phase line L, a power supply neutral line N and a control line C to form high, medium and low three-level control signals.
  • the three-stage dimming control signal forming circuit is to provide a fluorescent lamp ballast that is connected with a ballast by three lines of a power supply phase line L, a power supply neutral line N and a control line C to form high, medium and low three-level control signals.
  • the present invention provides a three-stage dimming control signal forming circuit for a fluorescent lamp ballast, and an electronic ballast for suppressing an electromagnetic interference inductor coil on an intermediate line of an AC power supply line and a neutral line.
  • the connection between the control line C connected to the ballast input AC power supply via the dimming control single-pole three-position band switch K2, or the neutral line of the ballast input AC power supply, or the formation of no connection Three different levels of dimming control signals.
  • the control line C of the dimming control single-pole three-band switch K2 is connected to the input AC power supply phase line L in turn, or connected to the input AC power supply neutral line N, or is not connected and suspended, correspondingly realizes that the fluorescent lamp is 100% brightness, Or medium 50% brightness, or 5% to 10% brightness.
  • the control line C of the dimming control single-pole three-position band switch K2 is connected to one end of the electromagnetic interference inductance coil L1 on the input AC power supply neutral line N, and the other end of the inductance coil L1 and the reference point of the control signal forming circuit, that is, two The sources of the field effect switching transistors Q1 and Q2 are connected.
  • the dimming control signal forming circuit is connected to a rectifier diode D1 connected to the control line C of the dimming control single-pole three-bit band switch K2, and the voltage filtered by the filter capacitor C1 is divided by the voltage dividing resistors R1 and R2 and the field effect switch.
  • the gate of the transistor Q1 is connected, the drain of the field effect switch Q1 is connected to the gate of another field effect switch Q2, the drain load resistor R4 of the field effect switch Q1 and the drain load resistor of the field effect switch Q2.
  • R6 and the common point of the voltage dividing resistors R3 and R5 output the dimming DC control voltage.
  • the drain load of FET Q2 outputs a DC control voltage.
  • the AC power line voltage Vac input directly from the off-the-shelf ballast and the voltage drop VL on the electromagnetic interference suppression inductor connected to the neutral line N of the input AC power source in the ballast during normal operation are used to form a high voltage corresponding to the brightest brightness.
  • the utility model has the advantages of simple circuit, low manufacturing cost, reliable and convenient operation and the like.
  • the dimming control single-pole three-position band switch K2 is used as a control switch for forming high, medium and low levels.
  • the power supply voltage Vac is rectified and filtered by the control line C via the diode D1 and the filter capacitor C1, and is connected to the gate of the field effect switch Q1.
  • the voltage divided by the voltage resistors R1 and R2 turns on the switching transistor Q1 and causes the switching transistor Q2 to be turned off.
  • the above rectified voltage is divided by the voltage dividing resistors R3 and R4, and the obtained output voltage Vo is at a high level.
  • the voltage drop VL on the electromagnetic interference suppression inductor L1 connected to the input AC power supply line N in the ballast during normal operation passes through the control line C through the diode D1 and the filter
  • the rectified and filtered DC voltage of the capacitor C1 and the divided voltage of the voltage dividing resistors R1 and R2 also turn on the field effect switch Q1 and the switch Q2.
  • the above-mentioned rectified voltage is divided by the voltage dividing resistor R3 and the switching resistor Q1 of the switching transistor Q1, and the obtained output voltage Vo is at a medium level.
  • the control line C When the dimming control single-pole three-position switch K2 bit 3 position, the control line C is suspended, no voltage is rectified and filtered by the diode D1 and the filter capacitor C1, the field effect switch tube Q1 is turned off, and the control pole of the switch tube Q2 passes through the resistor R4. And R5 is connected to the low voltage DC power +Vdc provided inside the ballast. The voltage Vo formed at this time is +Vdc divided by the resistor R5 and the switching transistor Q2 load resistor R6 to obtain a low-level output voltage Vo.
  • the value of the high, medium and low level of the output voltage Vo formed can be based on the power supply voltage Vac, the voltage drop VL on the electromagnetic interference suppression inductor L1, the voltage +Vdc provided inside the ballast, by adjusting the resistors R3, R4 , R5 and R6 resistance values are determined.
  • the superior function of the present invention is that the voltage drop on the electromagnetic interference suppression inductor coil connected to the power supply neutral N is used as a sampling signal for forming a medium brightness level; when the control line C is connected to the power supply phase line L Forming a high level corresponding to the brightest brightness; and forming the most brightness when the control line C is left floating Dark corresponds to the low level.
  • the utility model has the advantages of simple circuit, low manufacturing cost, reliable and convenient operation and the like.
  • Figure 1 is a schematic circuit diagram of the present invention
  • VL mid-line electromagnetic interference suppresses the voltage drop across the inductor
  • K2 power factor correction single-pole three-bit band switch
  • N AC power supply neutral line
  • R4 Switch tube Q 1 load resistance
  • the present invention provides a three-stage dimming control signal forming circuit for a fluorescent lamp ballast.
  • the power supply of the ballast is a two-phase AC power source, and the inductor is provided with an electromagnetic coil for suppressing electromagnetic interference.
  • Phase line, mid-line power supply and electronic ballast with built-in electromagnetic interference suppression coil on the neutral line connected to the phase line of the ballast input AC power supply by a control line C connected to a dimming control single-pole three-band switch K2 Connected, or connected to the centerline of the ballast input AC power, or not connected to form three different levels of dimming control signals.
  • the dimming control control line C of the single-pole three-position band switch K2, the dimming control of the phase line L of the input AC power supply is alternately controlled, the bit 1 of the single-pole three-bit band switch K2, or the dimming of the neutral line N connected to the input AC power source Controlling the bit 2 of the single-pole three-position band switch K2, or sequentially connecting with the floating position of the floating dimming control single-pole three-position band switch K2, correspondingly realizes that the fluorescent lamp is 100% brightness, or medium brightness, or 5% ⁇ 10 %brightness.
  • the control line C of the dimming control single-pole three-position band switch K2 is connected to one end of the electromagnetic interference inductance coil L1 on the input AC power supply neutral line N, and the other end of the inductance coil L1 and the reference point of the control signal forming circuit, that is, two The sources of the field effect switching transistors Q1 and Q2 are connected.
  • the dimming control signal forming circuit is connected to a rectifier diode D1 connected to the control line C of the dimming control single-pole three-bit band switch K2, and the voltage filtered by the filter capacitor C1 is divided by the voltage dividing resistors R1 and R2 and the field effect switch.
  • the gate of the transistor Q1 is connected, the drain of the field effect switch Q1 is connected to the gate of another field effect switch Q2, the drain load resistor R4 of the field effect switch Q1 and the drain load resistor of the field effect switch Q2.
  • R6 and the common point of the voltage dividing resistors R3 and R5 output the dimming DC control voltage.
  • the electronic ballast 1 is connected to the phase line of the AC power supply via the power switch K1. When the power switch K1 is closed, the electronic ballast 1 obtains the AC supply voltage Vac from the phase line L and the neutral line N of the AC power supply and works normally.
  • the AC power supply voltage Vac of the input ballast is first passed through the electromagnetic interference suppression inductor 10 to suppress electromagnetic interference inside the ballast to the power grid.
  • the AC power source voltage is changed to a DC voltage.
  • the power factor of the ballast is increased by the power factor correction circuit 30 to improve the harmonic distortion of the power supply current.
  • the boosted DC voltage is converted into a high frequency alternating current in the inverter 40, and is output from the ballast 1 to drive the load fluorescent lamp 2.
  • the normal operating frequency of the inverter is fixed at 20 kHz to 33 kHz or 40 kHz or more.
  • the change in brightness is by changing the operating frequency of the inverter. To achieve.
  • the operating frequency of the inverter is controlled by the dimming control circuit 60.
  • a DC control voltage of 0 ⁇ 10V is applied to the dimming control circuit 60, which can change the operating frequency of the inverter, so that the fluorescent lamp is between the darkest and the brightest. Variety.
  • the 60 provides three high, medium and low control signals corresponding to the three brightness levels.
  • the dimming control single-pole three-bit band switch K2 bit 1 corresponds to the output high level, and is connected to the phase line L of the alternating current power supply after the power switch K1.
  • the dimming control single-pole three-position band switch K2 bit 2 corresponds to the output intermediate level, which is connected to the input terminal 1 of the EMI suppression inductor L1 on the neutral line N of the AC power supply.
  • Dimming control Single-pole three-position band switch K2 bit 3 is left floating, corresponding to output low level.
  • the reference point for the three high, medium and low control signals formed is the output of the EMI suppression inductor L1 on the neutral line N of the AC supply.
  • a control line C is drawn from the knife of the dimming control single-pole three-band switch K2, and is connected to the positive pole of the rectifier diode D1.
  • the negative terminal of the rectifier diode D1 is connected to the common point of the filter capacitor C1 and the voltage dividing resistors R1 and R3.
  • the gate of the field effect switch Q1 is connected to the common point of the voltage dividing resistors R1 and R2.
  • the drain of the field effect switch Q1 is connected to the load resistor R4 and the gate of the field effect switch Q2.
  • the sources of the field effect switching transistors Q1 and Q2 are connected to the other end of the voltage dividing resistor R2 and connected to the output terminal 2 of the neutral line N to suppress the electromagnetic interference inductor coil L1.
  • the drain of the field effect switch Q2 is connected to one end of the load resistor R6, one end of the voltage dividing resistor R5 is connected to the DC low voltage +Vdc provided inside the ballast, the other end is connected with the load resistor R6 and the voltage dividing resistor R3 and the load resistor
  • the common points of R4 are connected together, and the dimming control voltage Vo formed by the output is outputted through the potential isolation and level shifting circuit 50 to obtain a dimming control voltage adapted to the control input of the dimming control 60.
  • the power supply voltage Vac is rectified and filtered by the diode D1 and the filter capacitor C1, and the voltage dividing resistors R1 and R2 connected to the gate of the field effect switch Q1 are connected.
  • the divided voltage turns on the switching transistor Q1 and causes the switching transistor Q2 to be turned off.
  • the rectified voltage is synthesized by the voltage dividing resistor R3 and the load resistor R4 and the low voltage DC voltage +Vdc provided by the internal ballast, and is divided and divided by the voltage dividing resistor R5 and the load resistor R4, and the output voltage Vo is a high level.
  • the dimming control single-pole three-position band switch K2 When the dimming control single-pole three-position band switch K2 is in position 2, the voltage drop VL on the electromagnetic interference suppression inductor L1 connected to the input AC power supply line N in the ballast during normal operation passes through the diode D1 and the filter capacitor C1.
  • the rectified and filtered DC voltage, the divided voltage of the voltage dividing resistors R1 and R2 also turns on the field effect switch Q1 and the switch Q2.
  • the rectified voltage at this time is divided by the voltage dividing resistor R3 and the load resistor R4, and the obtained output voltage Vo is at a medium level.
  • the control line C is suspended, no voltage is rectified and filtered by the diode D1 and the filter capacitor C1, the field effect switch tube Q1 is turned off, and the gate of the switch tube Q2 passes the load resistor R4 and voltage divider resistor R5 are turned on with the low voltage DC power supply +Vdc provided inside the ballast.
  • the output voltage Vo formed at this time is +Vdc divided by the voltage dividing resistor R5 and the load resistor R6 to obtain a low level.
  • the value of the high, medium and low level of the formed output voltage Vo can be adjusted according to the power supply voltage Vac, the voltage drop VL on the electromagnetic interference inductor L1, the voltage +Vdc provided inside the ballast, by adjusting the resistor R3,
  • the resistance values of R4, R5 and R6 are determined.

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Abstract

The present invention discloses a forming circuit of three-section dimming control signals of a fluorescent lamp ballast. An electronic ballast which is supplied with power by a phase line and a middle line of an alternating current power supply is internally provided with an electromagnetic interference inhibition inductance coil on the middle line, and the electronic ballast is connected with the phase line of a ballast input alternating current power supply through a control line C on a dimming control single-pole three-position band switch K2, or is connected with the middle line of the ballast input alternating current power supply, or is not connected with the phase line and the middle line, thereby forming three dimming control signals with different level. The present invention has the advantages of simple circuit, low manufacture cost, reliable and convenient operation and control.

Description

荧光灯镇流器三段调光控制信号形成电路  Fluorescent lamp ballast three-stage dimming control signal forming circuit
技术领域 Technical field
本发明涉及一种照明用荧光灯电子镇流器的调光控制器，特别涉及一种分段 调光的控制信号形成电路。  The present invention relates to a dimming controller for an electronic ballast for fluorescent lamps for illumination, and more particularly to a control signal forming circuit for segment dimming.
背景技术 Background technique
为了满足荧光灯照明的不同应用需求， 除了能正常点亮荧光灯的镇流器之 外， 已经出现了各种能控制荧光灯亮度变化的调光镇流器。  In order to meet the different application requirements of fluorescent lighting, in addition to the ballast that can normally illuminate fluorescent lamps, various dimming ballasts have been developed which can control the brightness variation of fluorescent lamps.
荧光灯的亮度控制是通过改变驱动荧光灯的电子镇流器的工作频率从而改 变流过荧光灯的电流来实现的。荧光灯调光镇流器的核心可以归结为产生一个对 镇流器逆变器进行频率控制的低电平直流控制信号，通过对镇流器内部逆变器的 振荡频率进行控制，便可实现荧光灯亮度的调节。控制信号的形式也就确定了调 光即荧光灯亮度变化的形式。通常是对电子镇流器逆变器的频率控制电路施加一 个如 IV至 10V的可变低电平直流电压来实现荧光灯调光的。直流控制电平的高、 低变化使镇流器的工作频率发生相应的变化，因而相对应的流过荧光灯的电流以 及发光亮度也就随之改变。  The brightness control of a fluorescent lamp is achieved by changing the operating frequency of the electronic ballast that drives the fluorescent lamp to change the current flowing through the fluorescent lamp. The core of the fluorescent dimming ballast can be attributed to a low-level DC control signal that controls the frequency of the ballast inverter. By controlling the oscillation frequency of the internal inverter of the ballast, the fluorescent lamp can be realized. Adjustment of brightness. The form of the control signal also determines the form of dimming, that is, the change in brightness of the fluorescent lamp. Fluorescent dimming is typically performed by applying a variable low level DC voltage, such as IV to 10V, to the frequency control circuit of the electronic ballast inverter. The high and low variations of the DC control level cause a corresponding change in the operating frequency of the ballast, so that the corresponding current flowing through the fluorescent lamp and the brightness of the illumination change.
按控制方式，荧光灯电子镇流器的调光可分为由暗到亮或由亮到暗亮度渐变 的连续调光控制方式和亮度逐级变化的分段调光控制方式两大类。  According to the control mode, the dimming of the electronic ballast of the fluorescent lamp can be divided into two types: a continuous dimming control mode from dark to bright or from bright to dark brightness, and a segmental dimming control mode in which the brightness is changed step by step.
最常见的分段调光是所谓 "两段"调光和 "三段"调光。 只有亮（100%亮度 电平）和暗（如 5%或 10%亮度电平）两种亮度变化的称为两段调光；而有亮（100% 亮度电平）、 中等亮度 （如 50%亮度电平） 和暗 （如 5%或 10%亮度电平） 三种亮 度电平变化的称为三段调光。  The most common segmentation dimming is the so-called "two-stage" dimming and "three-segment" dimming. Only two brightness changes (bright (100% brightness level) and dark (such as 5% or 10% brightness level) are called two-stage dimming; and bright (100% brightness level), medium brightness (such as 50) % brightness level) and dark (such as 5% or 10% brightness level) The three brightness level changes are called three-stage dimming.
连续变化的调光控制信号电压得到亮暗连续调光的效果；产生分级电平的调 光控制信号电压就可实现分段调光。两段调光方式通过形成高、低两个电平的控 制信号来实现； 三段调光方式则是通过形成高、 中和低三个电平的控制信号来实 现。 The continuously varying dimming control signal voltage achieves the effect of bright and dark continuous dimming; the dimming control signal voltage that produces the grading level enables segmental dimming. The two-stage dimming mode is realized by forming two high-level and low-level control signals; the three-stage dimming mode is realized by forming three levels of high, medium and low control signals. Now.
有一种对接在镇流器交流电源输入线上两个单刀开关的四种通断状态组合， 通过光电耦合和数模转换， 输出高、 中、低和零等四种控制电平的三段调光镇流 器。 也有采用专用集成电路实现分段调光的。  There is a combination of four on-off states of two single-pole switches connected to the ballast AC power input line. Through photoelectric coupling and digital-to-analog conversion, three levels of three control levels, high, medium, low and zero, are output. Light ballast. There are also dedicated integrated circuits for segmented dimming.
发明内容 Summary of the invention
本发明所要解决的技术问题是要提供一种要以电源相线 L、 电源中线 N以及 控制线 C三根线与镇流器连接， 形成高、 中和低三个电平控制信号的荧光灯镇流 器三段调光控制信号形成电路。  The technical problem to be solved by the present invention is to provide a fluorescent lamp ballast that is connected with a ballast by three lines of a power supply phase line L, a power supply neutral line N and a control line C to form high, medium and low three-level control signals. The three-stage dimming control signal forming circuit.
为了解决以上的技术问题，本发明提供了一种荧光灯镇流器三段调光控制信 号形成电路，在以交流电源相线， 中线供电并在中线上内置抑制电磁干扰电感线 圈的电子镇流器中， 通过接在一调光控制单刀三位波段开关 K2上的控制线 C与 镇流器输入交流电源的相线连接， 或与镇流器输入交流电源的中线连接， 或都不 连接的形成三种不同电平的调光控制信号。  In order to solve the above technical problem, the present invention provides a three-stage dimming control signal forming circuit for a fluorescent lamp ballast, and an electronic ballast for suppressing an electromagnetic interference inductor coil on an intermediate line of an AC power supply line and a neutral line. The connection between the control line C connected to the ballast input AC power supply via the dimming control single-pole three-position band switch K2, or the neutral line of the ballast input AC power supply, or the formation of no connection Three different levels of dimming control signals.
所述调光控制单刀三位波段开关 K2的控制线 C， 轮流连接输入交流电源相 线 L， 或连接输入交流电源中线 N， 或者都不连接而悬空， 则相应地实现荧光灯 为 100%亮度， 或中等 50%亮度， 或 5%〜10%亮度。  The control line C of the dimming control single-pole three-band switch K2 is connected to the input AC power supply phase line L in turn, or connected to the input AC power supply neutral line N, or is not connected and suspended, correspondingly realizes that the fluorescent lamp is 100% brightness, Or medium 50% brightness, or 5% to 10% brightness.
所述调光控制单刀三位波段开关 K2的控制线 C与输入交流电源中线 N上的 抑制电磁干扰电感线圈 L1的一端连接，电感线圈 L1的另一端与控制信号形成电 路的基准点， 即二个场效应开关管 Ql、 Q2的源极连接。  The control line C of the dimming control single-pole three-position band switch K2 is connected to one end of the electromagnetic interference inductance coil L1 on the input AC power supply neutral line N, and the other end of the inductance coil L1 and the reference point of the control signal forming circuit, that is, two The sources of the field effect switching transistors Q1 and Q2 are connected.
所述调光控制信号形成电路， 是与调光控制单刀三位波段开关 K2的控制线 C连接一整流二极管 Dl， 经滤波电容 C1滤波后的电压经分压电阻 Rl、 R2后与场 效应开关管 Q1的栅极连接， 场效应开关管 Q1漏极与另一场效应开关管 Q2的栅 极连接， 从场效应开关管 Q1的漏极负载电阻 R4和场效应开关管 Q2的漏极负载 电阻 R6以及分压电阻 R3， R5的公共点输出调光直流控制电压。 场效应管 Q2的 漏极负载输出直流控制电压。 直接以现成的镇流器输入的交流电源线电压 Vac 和正常工作时镇流器中接 在输入交流电源中线 N上的电磁干扰抑制电感上的压降 VL作为形成与亮度最亮 相对应的高电平和与形成中等亮度电平的取样信号。具有线路简单， 制造成本低 廉， 操控可靠方便等优点。 The dimming control signal forming circuit is connected to a rectifier diode D1 connected to the control line C of the dimming control single-pole three-bit band switch K2, and the voltage filtered by the filter capacitor C1 is divided by the voltage dividing resistors R1 and R2 and the field effect switch. The gate of the transistor Q1 is connected, the drain of the field effect switch Q1 is connected to the gate of another field effect switch Q2, the drain load resistor R4 of the field effect switch Q1 and the drain load resistor of the field effect switch Q2. R6 and the common point of the voltage dividing resistors R3 and R5 output the dimming DC control voltage. The drain load of FET Q2 outputs a DC control voltage. The AC power line voltage Vac input directly from the off-the-shelf ballast and the voltage drop VL on the electromagnetic interference suppression inductor connected to the neutral line N of the input AC power source in the ballast during normal operation are used to form a high voltage corresponding to the brightest brightness. Peace and form a sampled signal with a medium brightness level. The utility model has the advantages of simple circuit, low manufacturing cost, reliable and convenient operation and the like.
以调光控制单刀三位波段开关 K2作为形成高、中和低三个电平的控制开关。 在调光控制单刀三位波段开关 K2的位 1位置时， 电源电压 Vac通过控制线 C经二极管 D1和滤波电容 C1整流、 滤波后的直流电压， 接在场效应开关管 Q1 控制门极上的分压电阻 R1和 R2分得的电压使开关管 Q1导通， 并导致开关管 Q2 截止。 上述整流电压经分压电阻 R3和 R4分压， 得到的输出电压 Vo为高电平。  The dimming control single-pole three-position band switch K2 is used as a control switch for forming high, medium and low levels. In the position 1 of the dimming control single-pole three-bit band switch K2, the power supply voltage Vac is rectified and filtered by the control line C via the diode D1 and the filter capacitor C1, and is connected to the gate of the field effect switch Q1. The voltage divided by the voltage resistors R1 and R2 turns on the switching transistor Q1 and causes the switching transistor Q2 to be turned off. The above rectified voltage is divided by the voltage dividing resistors R3 and R4, and the obtained output voltage Vo is at a high level.
在调光控制单刀三位波段开关 K2位 2位置时， 正常工作时镇流器中接在输 入交流电源中线 N上的电磁干扰抑制电感 L1上的压降 VL通过控制线 C经二极管 D1和滤波电容 C1整流、 滤波后的直流电压， 分压电阻 R1和 R2的分压电压也使 场效应开关管 Q1导通和开关管 Q2截止。 此时的上述整流电压经分压电阻 R3和 开关管 Q1负载电阻 R4分压， 得到的输出电压 Vo为中电平。  When the dimming control single-pole three-position switch K2 bit 2 position, the voltage drop VL on the electromagnetic interference suppression inductor L1 connected to the input AC power supply line N in the ballast during normal operation passes through the control line C through the diode D1 and the filter The rectified and filtered DC voltage of the capacitor C1 and the divided voltage of the voltage dividing resistors R1 and R2 also turn on the field effect switch Q1 and the switch Q2. At this time, the above-mentioned rectified voltage is divided by the voltage dividing resistor R3 and the switching resistor Q1 of the switching transistor Q1, and the obtained output voltage Vo is at a medium level.
在调光控制单刀三位波段开关 K2位 3位置时， 控制线 C悬空， 没有电压经 二极管 D1和滤波电容 C1整流、滤波， 场效应开关管 Q1截止， 开关管 Q2的控制 极因通过电阻 R4和 R5与镇流器内部提供的低压直流电源 +Vdc而导通。 此时形 成的电压 Vo为 +Vdc经电阻 R5和开关管 Q2负载电阻 R6分压， 得到一个低电平 的输出电压 Vo。  When the dimming control single-pole three-position switch K2 bit 3 position, the control line C is suspended, no voltage is rectified and filtered by the diode D1 and the filter capacitor C1, the field effect switch tube Q1 is turned off, and the control pole of the switch tube Q2 passes through the resistor R4. And R5 is connected to the low voltage DC power +Vdc provided inside the ballast. The voltage Vo formed at this time is +Vdc divided by the resistor R5 and the switching transistor Q2 load resistor R6 to obtain a low-level output voltage Vo.
所形成的输出电压 Vo的高、 中和低电平的值， 可根据电源电压 Vac， 电磁 干扰抑制电感 L1上的压降 VL， 镇流器内部提供的电压 +Vdc， 通过调整电阻 R3， R4， R5和 R6的阻值来确定。  The value of the high, medium and low level of the output voltage Vo formed can be based on the power supply voltage Vac, the voltage drop VL on the electromagnetic interference suppression inductor L1, the voltage +Vdc provided inside the ballast, by adjusting the resistors R3, R4 , R5 and R6 resistance values are determined.
本发明的优越功效在于：以镇流器输入端接在电源中线 N上的抑制电磁干扰 电感线圈上的压降作为形成中等亮度电平的取样信号； 在控制线 C与电源相线 L 连接时， 形成与亮度最亮相对应的高电平； 而在控制线 C悬空时， 形成与亮度最 暗相对应的低电平。 具有线路简单， 制造成本低廉， 操控可靠方便等优点。 附图说明 The superior function of the present invention is that the voltage drop on the electromagnetic interference suppression inductor coil connected to the power supply neutral N is used as a sampling signal for forming a medium brightness level; when the control line C is connected to the power supply phase line L Forming a high level corresponding to the brightest brightness; and forming the most brightness when the control line C is left floating Dark corresponds to the low level. The utility model has the advantages of simple circuit, low manufacturing cost, reliable and convenient operation and the like. DRAWINGS
图 1为本发明的原理电路图；  Figure 1 is a schematic circuit diagram of the present invention;
图中标号说明 Description of the figures in the figure
1 -电子镇流器； VL 中线上电磁干扰抑制电感上的压降； 1 - electronic ballast; VL mid-line electromagnetic interference suppresses the voltage drop across the inductor;
2—荧光灯； Vo—调光控制信号输出电压； 2—fluorescent lamp; Vo—dimming control signal output voltage;
3—三段调光控制信号形成电路； +Vdc 直流低电压；  3—three-stage dimming control signal forming circuit; +Vdc DC low voltage;
10 电磁干扰抑制电感； Gnd—地；  10 electromagnetic interference suppression inductance; Gnd-ground;
20—整流电路； K1一镇流器通断开关；  20—rectifier circuit; K1 ballast switch;
30—功率因数校正； K2—调光控制单刀三位波段开关:  30—power factor correction; K2—dimming control single-pole three-bit band switch:
40—逆变器； L1一抑制电磁干扰电感线圈；  40—inverter; L1—inhibiting electromagnetic interference inductance coil;
50 电位隔离电平转移； D1 整流二极管；  50 potential isolation level shift; D1 rectifier diode;
60—调光控制； C1一滤波电容；  60-dimming control; C1-filter capacitor;
L一交流供电相线； Rl、 R2、 R 3、 R 5—分压电阻； L-AC power supply phase line; Rl, R2, R 3, R 5 - voltage divider resistor;
N—交流供电中线； R4—开关管 Q 1负载电阻； N—AC power supply neutral line; R4—Switch tube Q 1 load resistance;
C 调光控制线； R6—开关管 Q 2负载电阻  C dimming control line; R6—switch tube Q 2 load resistor
Vac—交流供电电压； Ql， Q2—场效应管开关管。  Vac—AC supply voltage; Ql, Q2— FET switch.
具体实施方式 detailed description
请参阅附图所示， 对本发明作进-一步的描述。  The present invention will be described in more detail with reference to the accompanying drawings.
如图 1所示， 本发明提供了一种荧光灯镇流器三段调光控制信号形成电路， 镇流器的供电为二相交流电源， 整流器内设置有抑制电磁干扰电感线圈， 在以交 流电源相线， 中线供电并在中线上内置抑制电磁干扰电感线圈的电子镇流器中， 通过接在一调光控制单刀三位波段开关 K2上的控制线 C与镇流器输入交流电源 的相线连接， 或与镇流器输入交流电源的中线连接， 或都不连接的形成三种不同 电平的调光控制信号。 所述调光控制单刀三位波段开关 K2的控制线 C， 轮流连接输入交流电源的 相线 L的调光控制单刀三位波段开关 K2的位 1， 或连接输入交流电源的中线 N 的调光控制单刀三位波段开关 K2的位 2， 或者与悬空的调光控制单刀三位波段 开关 K2的位 3依次相连接， 则相应地实现荧光灯为 100%亮度， 或中等亮度， 或 5%〜10%亮度。 As shown in FIG. 1 , the present invention provides a three-stage dimming control signal forming circuit for a fluorescent lamp ballast. The power supply of the ballast is a two-phase AC power source, and the inductor is provided with an electromagnetic coil for suppressing electromagnetic interference. Phase line, mid-line power supply and electronic ballast with built-in electromagnetic interference suppression coil on the neutral line, connected to the phase line of the ballast input AC power supply by a control line C connected to a dimming control single-pole three-band switch K2 Connected, or connected to the centerline of the ballast input AC power, or not connected to form three different levels of dimming control signals. The dimming control control line C of the single-pole three-position band switch K2, the dimming control of the phase line L of the input AC power supply is alternately controlled, the bit 1 of the single-pole three-bit band switch K2, or the dimming of the neutral line N connected to the input AC power source Controlling the bit 2 of the single-pole three-position band switch K2, or sequentially connecting with the floating position of the floating dimming control single-pole three-position band switch K2, correspondingly realizes that the fluorescent lamp is 100% brightness, or medium brightness, or 5%~10 %brightness.
所述调光控制单刀三位波段开关 K2的控制线 C与输入交流电源中线 N上的 抑制电磁干扰电感线圈 L1的一端连接，电感线圈 L1的另一端与控制信号形成电 路的基准点， 即二个场效应开关管 Ql、 Q2的源极连接。  The control line C of the dimming control single-pole three-position band switch K2 is connected to one end of the electromagnetic interference inductance coil L1 on the input AC power supply neutral line N, and the other end of the inductance coil L1 and the reference point of the control signal forming circuit, that is, two The sources of the field effect switching transistors Q1 and Q2 are connected.
所述调光控制信号形成电路， 是与调光控制单刀三位波段开关 K2的控制线 C连接一整流二极管 Dl， 经滤波电容 C1滤波后的电压经分压电阻 Rl、 R2后与场 效应开关管 Q1的栅极连接， 场效应开关管 Q1漏极与另一场效应开关管 Q2的栅 极连接， 从场效应开关管 Q1的漏极负载电阻 R4和场效应开关管 Q2的漏极负载 电阻 R6以及分压电阻 R3， R5的公共点输出调光直流控制电压。  The dimming control signal forming circuit is connected to a rectifier diode D1 connected to the control line C of the dimming control single-pole three-bit band switch K2, and the voltage filtered by the filter capacitor C1 is divided by the voltage dividing resistors R1 and R2 and the field effect switch. The gate of the transistor Q1 is connected, the drain of the field effect switch Q1 is connected to the gate of another field effect switch Q2, the drain load resistor R4 of the field effect switch Q1 and the drain load resistor of the field effect switch Q2. R6 and the common point of the voltage dividing resistors R3 and R5 output the dimming DC control voltage.
电子镇流器 1经电源开关 K1接交流供电源的相线 L， 电源开关 K1合上时， 电子镇流器 1从供电交流电源的相线 L和中线 N获得交流供电电压 Vac而正常工 作。  The electronic ballast 1 is connected to the phase line of the AC power supply via the power switch K1. When the power switch K1 is closed, the electronic ballast 1 obtains the AC supply voltage Vac from the phase line L and the neutral line N of the AC power supply and works normally.
输入镇流器的交流电源电压 Vac,先经过电磁干扰抑制电感 10， 抑制镇流器 内部对电网的电磁干扰。 在整流电路 20中， 将交流电源电压变成直流电压。 通 过功率因数校正电路 30提高镇流器的功率因数， 改善电源电流的谐波失真。 提 升后的直流电压在逆变器 40中变换成高频交流， 从镇流器 1输出， 驱动负载荧 光灯 2。 在非调光的电子镇流器中逆变器的正常工作频率按规定为固定的 20kHz〜33kHz或大于等于 40kHz ; 在调光镇流器中， 亮度的变化是通过改变逆变 器的工作频率来实现的。 通过调光控制电路 60控制逆变器的工作频率， 逆变器 工作频率愈高，荧光灯的发光亮度愈暗。通常是对调光控制电路 60施加一个 0〜 10V的直流控制电压， 就能改变逆变器的工作频率， 使荧光灯在最暗和最亮之间 变化。 The AC power supply voltage Vac of the input ballast is first passed through the electromagnetic interference suppression inductor 10 to suppress electromagnetic interference inside the ballast to the power grid. In the rectifier circuit 20, the AC power source voltage is changed to a DC voltage. The power factor of the ballast is increased by the power factor correction circuit 30 to improve the harmonic distortion of the power supply current. The boosted DC voltage is converted into a high frequency alternating current in the inverter 40, and is output from the ballast 1 to drive the load fluorescent lamp 2. In a non-dimming electronic ballast, the normal operating frequency of the inverter is fixed at 20 kHz to 33 kHz or 40 kHz or more. In a dimming ballast, the change in brightness is by changing the operating frequency of the inverter. To achieve. The operating frequency of the inverter is controlled by the dimming control circuit 60. The higher the operating frequency of the inverter, the darker the luminance of the fluorescent lamp. Usually, a DC control voltage of 0~10V is applied to the dimming control circuit 60, which can change the operating frequency of the inverter, so that the fluorescent lamp is between the darkest and the brightest. Variety.
为了实现亮、中等亮度和暗三种亮度变化的三段调光， 就是为调光控制电路 In order to realize three-stage dimming of three brightness changes of bright, medium brightness and dark, it is a dimming control circuit
60提供一个与三种亮度电平相对应的高、 中和低三种控制信号。 The 60 provides three high, medium and low control signals corresponding to the three brightness levels.
所述调光控制单刀三位波段开关 K2的位 1对应输出高电平， 与经电源开关 K1之后的交流供电源的相线 L相连接。调光控制单刀三位波段开关 K2的位 2对 应输出中电平， 与交流供电源的中线 N上的抑制电磁干扰电感线圈 L1的输入端 1相连接。 调光控制单刀三位波段开关 K2的位 3悬空， 对应输出低电平。 形成 的高、中和低三种控制信号的基准点是交流供电源的中线 N上的抑制电磁干扰电 感线圈 L1的输出端 2。  The dimming control single-pole three-bit band switch K2 bit 1 corresponds to the output high level, and is connected to the phase line L of the alternating current power supply after the power switch K1. The dimming control single-pole three-position band switch K2 bit 2 corresponds to the output intermediate level, which is connected to the input terminal 1 of the EMI suppression inductor L1 on the neutral line N of the AC power supply. Dimming control Single-pole three-position band switch K2 bit 3 is left floating, corresponding to output low level. The reference point for the three high, medium and low control signals formed is the output of the EMI suppression inductor L1 on the neutral line N of the AC supply.
从调光控制单刀三位波段开关 K2的刀引出一根控制线 C， 与整流二极管 D1 的正极相接。整流二极管 D1的负极与滤波电容 C1及分压电阻 R1和 R3的公共点 接在一起。  A control line C is drawn from the knife of the dimming control single-pole three-band switch K2, and is connected to the positive pole of the rectifier diode D1. The negative terminal of the rectifier diode D1 is connected to the common point of the filter capacitor C1 and the voltage dividing resistors R1 and R3.
场效应开关管 Q1的栅极与分压电阻 R1和 R2的公共点接在一起。 场效应开 关管 Q1 的漏极接负载电阻 R4 以及场效应开关管 Q2的栅极。 场效应开关管 Q1 和 Q2的源极与分压电阻 R2的另一端接在一起后与中线 N上抑制电磁干扰电感线 圈 L1的输出端 2相连接。  The gate of the field effect switch Q1 is connected to the common point of the voltage dividing resistors R1 and R2. The drain of the field effect switch Q1 is connected to the load resistor R4 and the gate of the field effect switch Q2. The sources of the field effect switching transistors Q1 and Q2 are connected to the other end of the voltage dividing resistor R2 and connected to the output terminal 2 of the neutral line N to suppress the electromagnetic interference inductor coil L1.
场效应开关管 Q2的漏极与负载电阻 R6的一端相接， 分压电阻 R5的一端接 镇流器内部提供的直流低电压 +Vdc，另一端与负载电阻 R6以及分压电阻 R3和负 载电阻 R4的公共点接在一起， 输出形成的调光控制电压 Vo， 经电位隔离和电平 转移电路 50， 得到与调光控制 60的控制输入相适配的调光控制电压。  The drain of the field effect switch Q2 is connected to one end of the load resistor R6, one end of the voltage dividing resistor R5 is connected to the DC low voltage +Vdc provided inside the ballast, the other end is connected with the load resistor R6 and the voltage dividing resistor R3 and the load resistor The common points of R4 are connected together, and the dimming control voltage Vo formed by the output is outputted through the potential isolation and level shifting circuit 50 to obtain a dimming control voltage adapted to the control input of the dimming control 60.
当调光控制单刀三位波段开关 K2在位 1位置时， 电源电压 Vac经二极管 D1 和滤波电容 C1整流、滤波后的直流电压， 接在场效应开关管 Q1栅极上的分压电 阻 R1和 R2分得的电压使开关管 Q1导通， 并导致开关管 Q2截止。上述整流电压 经分压电阻 R3和负载电阻 R4以及由镇流器内部提供的低压直流电压 +Vdc，经分 压电阻 R5和负载电阻 R4分压合成， 输出电压 Vo为高电平 当调光控制单刀三位波段开关 K2在位 2位置时， 正常工作时镇流器中接在 输入交流电源中线 N上的抑制电磁干扰电感线圈 L1上的压降 VL经二极管 D1和 滤波电容 C1整流、 滤波后的直流电压， 经分压电阻 R1和 R2的分压电压也使场 效应开关管 Q1导通和开关管 Q2截止。 此时的上述整流电压经分压电阻 R3和负 载电阻 R4分压， 得到的输出电压 Vo为中电平。 When the dimming control single-pole three-position band switch K2 is in the position 1 position, the power supply voltage Vac is rectified and filtered by the diode D1 and the filter capacitor C1, and the voltage dividing resistors R1 and R2 connected to the gate of the field effect switch Q1 are connected. The divided voltage turns on the switching transistor Q1 and causes the switching transistor Q2 to be turned off. The rectified voltage is synthesized by the voltage dividing resistor R3 and the load resistor R4 and the low voltage DC voltage +Vdc provided by the internal ballast, and is divided and divided by the voltage dividing resistor R5 and the load resistor R4, and the output voltage Vo is a high level. When the dimming control single-pole three-position band switch K2 is in position 2, the voltage drop VL on the electromagnetic interference suppression inductor L1 connected to the input AC power supply line N in the ballast during normal operation passes through the diode D1 and the filter capacitor C1. The rectified and filtered DC voltage, the divided voltage of the voltage dividing resistors R1 and R2 also turns on the field effect switch Q1 and the switch Q2. The rectified voltage at this time is divided by the voltage dividing resistor R3 and the load resistor R4, and the obtained output voltage Vo is at a medium level.
在调光控制单刀三位波段开关 K2位 3位置时， 控制线 C悬空， 没有电压经 二极管 D1和滤波电容 C1整流、滤波， 场效应开关管 Q1截止， 开关管 Q2的栅极 因通过负载电阻 R4和分压电阻 R5与镇流器内部提供的低压直流电源 +Vdc而导 通。 此时形成的输出电压 Vo为 +Vdc经分压电阻 R5和负载电阻 R6分压， 得到一 个低电平。  When the dimming control single-pole three-position switch K2 bit 3 position, the control line C is suspended, no voltage is rectified and filtered by the diode D1 and the filter capacitor C1, the field effect switch tube Q1 is turned off, and the gate of the switch tube Q2 passes the load resistor R4 and voltage divider resistor R5 are turned on with the low voltage DC power supply +Vdc provided inside the ballast. The output voltage Vo formed at this time is +Vdc divided by the voltage dividing resistor R5 and the load resistor R6 to obtain a low level.
所形成的输出电压 Vo的高、 中和低电平的值， 可根据电源电压 Vac、 抑制 电磁干扰电感线圈 L1上的压降 VL、 镇流器内部提供的电压 +Vdc， 通过调整电阻 R3、 R4、 R5和 R6的阻值来确定。  The value of the high, medium and low level of the formed output voltage Vo can be adjusted according to the power supply voltage Vac, the voltage drop VL on the electromagnetic interference inductor L1, the voltage +Vdc provided inside the ballast, by adjusting the resistor R3, The resistance values of R4, R5 and R6 are determined.

Claims

权 利 要 求 书 Claims
、 一种荧光灯镇流器三段调光控制信号形成电路， 其特征在于： 在以交流电源 相线， 中线供电并在中线上内置抑制电磁干扰电感线圈的电子镇流器中， 通 过接在一调光控制单刀三位波段开关 K2上的控制线 C与镇流器输入交流电源 的相线连接， 或与镇流器输入交流电源的中线连接， 或都不连接的形成三种 不同电平的调光控制信号。 a three-stage dimming control signal forming circuit for a fluorescent lamp ballast, characterized in that: in an electronic ballast with an AC power supply phase line, a neutral line power supply and a built-in suppression electromagnetic interference inductance coil on the neutral line, The control line C on the single-pole three-band switch K2 of the dimming control is connected to the phase line of the ballast input AC power source, or to the center line of the ballast input AC power source, or is not connected to form three different levels. Dimming control signal.
、 根据权利要求 1所述的荧光灯镇流器三段调光控制信号形成电路， 其特征在 于： 所述调光控制单刀三位波段开关 K2的控制线 C， 轮流连接输入交流电源 相线 L， 或连接输入交流电源中线 N， 或者都不连接而悬空， 则相应地实现荧 光灯为 100%亮度， 或中等亮度， 或 5%〜10%亮度。 The three-stage dimming control signal forming circuit of the fluorescent lamp ballast according to claim 1, wherein: the control line C of the dimming control single-pole three-bit band switch K2 is connected in turn to the input AC power supply phase line L, Or connect the input AC power line N, or do not connect and hang, then the fluorescent lamp is 100% brightness, or medium brightness, or 5%~10% brightness.
、 根据权利要求 1或 2所述的荧光灯镇流器三段调光控制信号形成电路， 其特 征在于：所述调光控制单刀三位波段开关 K2的控制线 C与输入交流电源中线 N上的抑制电磁干扰电感线圈 L1的一端连接， 电感线圈 L1的另一端与控制 信号形成电路的基准点， 即二个场效应开关管 Ql、 Q2的源极连接。 The three-stage dimming control signal forming circuit of the fluorescent lamp ballast according to claim 1 or 2, characterized in that: the control line C of the dimming control single-pole three-bit band switch K2 and the input AC power supply neutral line N One end of the electromagnetic interference inductive coil L1 is connected, and the other end of the inductor L1 is connected to a reference point of the control signal forming circuit, that is, the sources of the two field effect switching transistors Q1 and Q2.
、 根据权利要求 1所述的荧光灯镇流器三段调光控制信号形成电路， 其特征在 于： 所述调光控制信号形成电路， 是与调光控制单刀三位波段开关 K2的控制 线 C连接一整流二极管 Dl， 经滤波电容 C1滤波后的电压经分压电阻 Rl、 R2 后与场效应开关管 Q1的栅极连接， 场效应开关管 Q1漏极与另一场效应开关 管 Q2的栅极连接， 从场效应开关管 Q1的漏极负载电阻 R4和场效应开关管 Q2的漏极负载电阻 R6以及分压电阻 R3，R5的公共点输出调光直流控制电压。 The fluorescent lamp ballast three-stage dimming control signal forming circuit according to claim 1, wherein: said dimming control signal forming circuit is connected to a control line C of the dimming control single-pole three-bit band switch K2. A rectifier diode D1, the voltage filtered by the filter capacitor C1 is connected to the gate of the field effect switch Q1 via the voltage dividing resistors R1 and R2, and the gate of the field effect switch Q1 and the gate of the other field effect switch Q2 Connected, the dimming DC control voltage is output from the common point of the drain load resistor R4 of the field effect switch Q1 and the drain load resistor R6 of the field effect switch Q2 and the voltage dividing resistors R3, R5.
PCT/CN2013/075243 2012-05-21 2013-05-07 Forming circuit of three-section dimming control signals of fluorescent lamp ballast WO2013174209A1 (en)

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