Starting device for high-pressure gas-discharge lamps

FIELD: electrical engineering; starting and operating circuits for gas-discharge lamps.

SUBSTANCE: proposed device designed for use in gas-discharge lamps of high starting voltage amounting to about 4 kV, such as high-pressure sodium vapor lamps, xenon and metal halide lamps that enables starting two lamps at a time from ac 220 V supply mains has dc current supply whose output is connected through series-interconnected converter and rectifier to input of inverter whose common input is connected to common inputs of inverter and rectifier and output, to its inverting output through two series-connected lamps; novelty is introduction of two voltage sensors, current sensor, second inverter, voltage multiplier, switch, capacitor, two delay circuits, OR circuit and NAND circuit; common output of dc current supply is connected to common inputs of two voltage sensors, multiplier, and through current sensor, to common inputs of converter and switch; output of dc current supply is connected to input of second inverter whose output is connected through multiplier to midpoint of two lamps and to capacitor electrode, other electrode of capacitor being connected to input of inverter; output of first voltage sensor is connected to input of NAND circuit and to input of first delay circuit whose inverting output is connected to input of OR circuit whose other input is connected to output of second voltage sensor and output, to clear inputs of converter and inverter, to control input of switch, and to input of second delay circuit whose output is connected to other input of NAND circuit; output of the latter is connected to clear input of second inverter; switch input is connected to rectifier output and current sensor output is connected to control input of converter.

EFFECT: enhanced efficiency, service life, power factor, and light stability; reduced power requirement.

1 cl, 2 dwg

 

The invention relates to electrical engineering, and in particular to circuits for ignition and operation of gas discharge lamps, mainly such as sodium lamps high-pressure metal halide lamp, a xenon lamp.

Known control circuit for a light source - U.S. patent No. 5130609 declared 26.01.1990, published 17.07.1992, which contains the input transformer is connected through a rectifier bridge and a diode to the smoothing capacitor, the positive electrode through a variable resistor and the first winding of the transformer is connected to the collector of the transistor, the base through the second winding of the transformer is connected to the positive electrode of the smoothing capacitor, the negative electrode of which is connected to the emitter of the transistor and through a capacitor to the first winding of the transformer. The third winding of the transformer is connected to the fluorescent lamp.

In this control scheme, the rectified voltage from the power supply and the smoothing capacitor is supplied through a variable resistor on the transformer winding and passes through the second winding of the transformer to the base of the transistor. Creates a positive feedback and the circuit oscillates. The collector of the transistor are formed of the voltage pulses which are converted on the third winding and serves on l is the IPA. When not burning the lamp current flowing through it, is small, the voltage pulses are large and lit the lamp. The current increases, the voltage pulse falls to a value sufficient for combustion of the gas in the lamp.

The disadvantage of this device is that it can only be used for low-power lamps, because when increasing the power increases the current flowing through the variable resistor; a greater power loss, and variable resistor overheats. In addition, a negative voltage pulse to the lamp is constant, proportional to the line voltage, and the positive pulse has a variable amount dependent on the resistance of the lamp. Therefore, the magnitude of the negative current of the lamp is not equal to the value of the positive current of the lamp and the light is unstable and can fade from one end. The low reliability of the device in case of overload. In addition, the device may not generate the ignition voltage of about 4 kV required for ignition of metal halide, xenon and sodium high pressure lamps.

Known pascarelli apparatus for lamps - patent of Russia №2116009 filed 19.06.1997, published 20.07.1998, the Apparatus includes serially connected surge protector, inverter, resonant circuit, the output of which is connected to two parallel connected lamps. To the other electrodes of the lamps under the offline current sensor, connected through serially connected diode bridge, power and the optocoupler to the control input of the inverter.

In this apparatus a constant voltage through a network filter to the input of the inverter, make it rectangular pulses, which are fed through the resonant circuit on the lamp. When the LEDs are off, the current passing through them is small, so the resonant circuit generates a high voltage, lighting the lamp. Then the voltage across the lamp drops to a voltage of combustion. The current of the lamp is detected in the current sensor, the output of which is rectified and amplified, and through the optocoupler is supplied to the inverter by adjusting the frequency of the rectangular pulse, changing the operating point on the resonance curve of the circuit, resulting in stabilizing the current passing through the lamp.

The disadvantages of this device are low reliability due to the absence of current protection apparatus when the failure of the transistors of the inverter, the lack of voltage protection when the failure or absence of lamps, as this resonant circuit develops a high output voltage, which can damage it. The device may not work on lamp high power, since the resonant circuit is difficult to do with output power of more than 80 watts. The device does not provide voltage saiga the Oia about 4 kV, required for ignition of metal halide, xenon and sodium high pressure lamps.

Known start-regulating device, certificate No. 12319 from 13.05.1999, BI 12-99. The device comprises a constant current source, the output of which is connected to the supply input of the inverter, the output of which through a smoothing unit connected to the input of the control unit of the inverter, the two outputs of which are connected to respective two control inputs to the inverter, the output of the smoothing unit connected through a ballast resistor to the input of the power supply control unit of the inverter and the second output smoothing unit through serially connected diode and resistor connected to the electrodes of the capacitor and dynistor, the second electrodes which are connected to the common output of the constant current source and a common input power source control unit of the inverter, a control unit of the inverter and the inverter. The output of the inverter can be connected through serially connected first capacitor and the inductor electrodes of the lamp and the second capacitor, the second electrodes are connected to a common input of the inverter.

When turning on the constant current source the output voltage is fed to the input power of the inverter, which generates at its output a rectangular pulse, the amplitude of which is equal to the voltage at which ihade constant current source. These pulses arrive at the input of the smoothing block, forming at its output a DC voltage through a balanced resistance is supplied to the power source control unit of the inverter, and the control unit inverter generates two output pulses controlling the operation of the inverter. The output pulses of the inverter through the first condenser is fed to the input of the resonant circuit consisting of the inductor and the second capacitor. When the non-burning lamp resonance occurs, the capacitor is formed of an alternating voltage, the amplitude of which may exceed the output voltage of the constant current source many times and may be of the order of 600-800 C. When this lamp is lit, and the lamp is supported by the amplitude of the voltage pulses is equal to the voltage of the lamp burn about 120 C. the Current in the lamp is limited to inductive resistance of the inductor. When a faulty operation in the circuits of the inverter increases the output voltage of the smoothing unit increases the voltage at the dynistor, he breaks and reduces the output voltage of the smoothing unit, and the control unit inverter stops working and the inverter stops the operation.

The disadvantages of this device is the low power lamp (40 W) in the load, because at high power resonant circuit is unstable, in the device from outstay connectivity to output more than one lamp. The device has no protection against overheating of the transistors of the inverter, short circuit these transistors, in which the constant current source fails. The device is not cheap, as it has no ability to change the brightness of the lamp depending on the ambient light. The device may not cause the amplitude of the resonance is of the order of 4 kV, which makes it impossible to use it to power metal halide, xenon and sodium high pressure lamps.

Known start-regulating device for gas discharge lamps, patent application No. 2001129485/09 (031513) from 29.10.2001, which is taken as a prototype. The device comprises a constant current source, the output of which is connected through serially connected inverter DC to AC pulse voltage (hereinafter referred to as "Converter"), the first rectifier to the inverter input, the total output of the constant current source is connected to the common input of the Converter, the inverter, the first and second rectifiers, whose input is connected to another output of the inverter, and the output connected to the inputs of the additional power of the Converter and the inverter, the output of which through the n series-connected lamps is connected to its inverted output.

When turning on the constant current source outputs the second voltage is fed to the input of the power Converter, output which pulses appear with a frequency of 20-50 kHz and variable amplitude, which is straight in the first rectifier and its output variable DC voltage is fed to the input power of the inverter. Simultaneously pulses of constant amplitude from another inverter output is fed to the input of the second rectifier, producing at its output a DC voltage used to power the circuits of the Converter and the inverter. At the outputs of the inverter formed by two anti-phase pulse repetition frequency of 50-100 kHz, with amplitude equal and proportional DC output voltage of the first rectifier, and a duty cycle equal to two (the pulse shape of the meander).

If the lamp is not lit, then the consumption of power is close to zero. This Converter generates at its output a pulse with a high amplitude, the value of which is limited by the internal circuit of the Converter at 600 volts. Therefore, the input power of the inverter receives DC voltage to 600 volts. Resulting in lamp comes pulsed AC voltage with amplitude n times higher ignition voltage single lamp (800). When this lamp is lit, sharply increasing the current of the lamps and power consumption, and the lamp automatically comes AC pulse voltage with amplit the DOI, n times greater voltage burning lamps (120 V). In this mode, the inverter output has a pulse of positive amplitude which is 90 volts. The brightness of the lamps is determined by the power consumption, the value of which is adjusted in the Converter by limiting the amplitude of the current stored in the primary winding of the transformer of the Converter.

The disadvantage of this device is that it cannot work with a sodium high-pressure lamps (HPS), metal halide and xenon lamps, which require ignition high, of the order of 4 kV, the voltage at significant power in the combustion mode of the order of 500 watts with a voltage of burning 80 C. This is because the combustion mode voltage at the input power of the inverter falls from 600 V to Un=600·(80/400)=12 Century When this power inverter current will be I=P/Un=500/12=41,7 A. This current passes through the power transistor of the inverter, the maximum pulse voltage at the time of launch is Umax=2·Un=2·600=1200 Century the Best of the existing field-effect transistors with such operational voltages and currents have the on-state resistance of the order of R=0.3 Ohms, the transistor will dissipate a power of P=1/2·I2·R=1/2·41,72·0,5=430 watts. Thus, almost all set transformed into the LEM 500 watts will be dissipated in the power transistor of the inverter, and the lamp will, in fact, canceled.

The claimed invention solves the problem of creating a more reliable and efficient ballast, ensuring efficient operation of sodium lamps, high pressure (HPS), metal halide and xenon lamps with an ignition voltage of 4000 V, stable power light bulbs, high efficiency, increase lamp life, increasing the value of cos ϕ to a value close to one.

To solve the problem in start-regulating device for gas discharge lamps high-pressure containing constant current source, the output of which is connected through serially connected inverter DC to AC pulse voltage (hereinafter referred to as "Converter") and the rectifier to the inverter, one input of which is connected to the common input of the inverter and rectifier, and the output is connected through two series-connected lamp with its inverted output, characterized in that the two sensor voltages, a current sensor, a second inverter, the voltage multiplier, key, condenser, two delay circuit, the scheme "or" and scheme "and-not", the total output of the constant current source is connected to the common inputs of two voltage sensors, multiplier and through the current sensor to the common inputs of the Converter and the key, exit IP is the source of constant current connected to the input of the first voltage detector and the input of the second inverter, exit through which the multiplier is connected to the input of the second voltage detector to the middle connection point of the two lamps and the electrode of the capacitor, the other electrode of which is connected to the input of the inverter, the output of the first voltage detector connected to the input schema "and not" and to the input of the first delay circuit, the inverted output of which is connected to the input circuit or, the other input of which is connected to the output of the second sensor voltage, and the output connected to the inputs of the reset to zero of the Converter and the inverter control input key and input of the second delay circuit, the output of which is connected to another input scheme "and-not", the output of which is connected to the input of the reset to zero of the second inverter, the input of the key is connected to the output of the rectifier, and the output of the current sensor is connected to the control input of the Converter.

This device can be optionally excluded connection between the output of the first sensor voltage and the input schema "and not" and the first delay circuit, it is the relationship between sensor output voltage and the control input of the Converter, but also introduced two temperature sensor, photo sensor, the controller, the interface, the third voltage sensor, an input connected to the output of the rectifier, the total input is connected to the common input of the inverter, and the output connected to the first input of the controller, a second input connected to the output of the second is Attica voltage, the third input is connected to the output of the current sensor, the fourth input is connected to the output of the first sensor voltage, the fifth input is connected to the output of the first temperature sensor, the sixth input is connected to the output of the second temperature sensor, seventh, eighth and ninth inputs connected to respective outputs of the three photosensors, a control input coupled to the output interface, analog output connected to the control input of the Converter, and a digital output connected to the input of the first delay circuit and to the input schema.

The invention is illustrated by drawings, where figure 1 - diagram of the ballast; figure 2 - timing diagram.

As shown in figure 1, the device consists of a source 1 DC, sensor 2 voltage, inverter 3, a multiplier 4, a transmitter 5, a rectifier 6, scheme 7 or circuits 8, 9 of the delay circuit 10 "and not"key 11, the inverter 12, the lamps 13, 14, capacitor 15, a sensor 16 current sensors 17, 18 voltage, the controller 19, the interface 20, the photosensors 21, 22, 23, sensors 24, 25 temperature.

Thus the output of source 1 DC is connected to the power input sensor 2 voltage of the inverter 3, the inverter 5, the total input of which is connected to the common input rectifier 6; key 11, the inverter 12 and through the current sensor 16 is connected to the common source output 1 DC, to the common inputs of the sensor 2, i.e. the taxpayer, inverter 3, a multiplier 4 and the voltage sensor 17, the output of the sensor 2 voltage is connected to the input circuit 10 "and not" and through the circuit 8 delays the input circuit 7 or, the other input of which is connected to the output of the voltage sensor 17, and the output connected with the control input key 11, with the inputs of the reset to zero of the inverter 12 and the inverter 5 and through the circuit 9 delays is connected to another input circuit 10 "and-not", the output of which is connected to the input of the reset to zero of the inverter 2, the output of which through the multiplier 4 is connected to the input of the divider 17 voltage to the electrodes of the lamps 13, 14 and capacitor 15, the other electrode of which is connected to the power input key 11 and the inverter 12 and the output of the rectifier 6, the inlet of which is connected to the output of the Converter 5, which has a control input connected to the output of the current sensor 16, the output of inverter 12 is connected to another electrode of the lamp 13, and the inverted output of inverter 12 is connected to the other electrode of the lamp 14.

The device operates as follows. When you enable source 1 power (1) at the output of the sensor 2 voltage appears at time T1 the voltage U2(figure 3). This voltage triggers the circuit 8 delays the output of which is during the time TV appears logical unit UUP. This signal forms the output of the circuit 7 or a logical unit U7dropping the zero key 11, the inverter 12 and preobrazovala the ü 5, who are excluded from work. In addition, the voltage U7through the circuit 9 delays is fed to the input circuit 10 "and-not", the output of which produces a logical zero U10authorizing the operation of the inverter 2, which in turn in the presence of supply voltage U1from source 1 starts to generate at its output variables pulses with a duty cycle of 2 (meander) and amplitude equal to twice the supply voltage 2U1. These pulses increase in magnitude in the multiplier 4, straighten up and begin to charge the capacitor 15, forming a high voltage in the form of the exponent U4. When reaching this voltage value 2 kV triggered sensor 17 voltage (T2) and its output appears logical unit that supports logical unit on the output of the circuit 7 "or".

The voltage from capacitor 15 is served on the joint electrodes of the lamps 13 and 14, and when it reaches the ignition voltage of about 4 kV (time T3) lamp break, discharging the capacitor 15 to zero. At this point, it triggers the voltage sensor 17, forming the output of the circuit 7 or a logical zero, which closes the key 11 and launches Converter 5 and the inverter 12. This Converter 5 generates approximately at a frequency of 30 kHz pulses that are straight rectifier 6, forming a constant voltage U6680 C. These pulses arrive at the lamp 13 and 14, the common electrodes have a voltage approximately equal to the voltage U6. The lamp should light up.

If the lamp does not light up, they restored high internal resistance and capacity of the multiplier 4 is enough to start again charge the capacitor 15. At time T4the sensor triggers 17 voltage, the voltage U17increases to the logical unit, which also appears on the output of the circuit 7 "or"opening the key 11, and prohibiting the operation of the Converter 5 and the inverter 12. Key 11 when this discharges the capacity of the rectifier 6 to zero, and the device enters a "zero" state. With increasing voltage U4up to 4 kV lamps 13 and 14 are punched again. The breakdown of the lamps is approximately 2-4 times. After another break of the lamp lights up (T5). The low-resistance state of the lamps bypasses the output voltage of the multiplier 4, which becomes close to the voltage at the output of the rectifier U6=80 Century

After lighting up of the lamps 13, 14 through time T9triggered circuit 9 delays its output will find is a logical zero, forming the output of the circuit 10 "and not" logical unit U10to disable the inverter 3, and the multiplier is 4 stops to work.

When you enable source 1 at the time T7triggered divider 2 voltage, all circuitry is de-energized, and the device enters the initial state.

In the combustion mode of the lamps at the output of the inverter 5 are formed pulses, the amplitude of which is equal to the voltage of burning lamps. The new bulbs this voltage is approximately equal to 80 C. the aging of the lamps this voltage increases due to the increase of the internal resistance of the lamps. Voltage combustion can reach 300 C. While the device continues to operate successfully, forming the inverter output 5 pulses with an amplitude of 300 C. the brightness of the lamp depends on the power consumed by the lamp power. This power is approximately equal to the power consumption of the entire device, which is defined:

RP=U1·I16,

where I16the current flowing through the current sensor 16;

U1- output voltage source 1.

While the current sensor 16 transmits to the control input of the Converter 5, the voltage proportional to the current I16.

This voltage is compared in the transducer 5 with an adjustable reference voltage, setting the current through the sensor 16 current proportional to a reference voltage. Therefore, regulation is coy reference voltage in the Converter 5 reach regulation of the luminous intensity of burning lamps 13 and 14.

In the currently used uskoregulirujushchej devices for lamps type LAMP, in which one lamp the inductor in AC 220 V, aging lamps, accompanied by an increase in internal resistance, leads to a drop in the strength of the light bulbs and then for their periodic shutdowns. In the inventive device, these lamps continue steadily to burn, because the device separately defined consumed by the lamp power and supported the voltage required for combustion.

When performing source 1 DC in the form of a rectifier AC 220 V, 50 Hz stability of the input voltage according to the state standard must be within ±10%. Therefore, the power consumed by the device, and hence the strength of the light bulbs can fluctuate within ±10%.

The device can operate with a single lamp in the load (lamp 14 excluded). It is necessary that the internal resistance of the capacitor 15 was an order of magnitude less than the resistance of a burning lamp. For this purpose it is necessary to fulfill the condition:

C15≥Pl/(Ug2f5)=500/(802·60·103)=1,3·10-6F=1,3 international film festival,

where Ug- the burning voltage of the lamp 13;

f5the frequency of the pulses at the output of inverter 12;

Pl- rated lamp power.

It should be noted that in the moments in which Hania lamps 13 and 14 high voltage (moments of T 3T5, figure 2) power units 5, 6, and 12 are either off or at zero voltage. When this high voltage interference, resulting in the breakdown of the lamps 13 and 14, not incapacitate these blocks, ensuring high reliability of the device as a whole. Only after passing the high-voltage interference blocks 5, 6, and 12 are included in the operation.

Use separate circuits for lighting lamps, consisting of the inverter 3 and the multiplier 4, allows the use of the Converter 5 and the inverter 12 low-voltage power MOSFETs with a maximum voltage of about 400 C. These transistors have a resistance in the open state at the level of less than 0.1 Ohm. Thus the current flowing through the power transistor of the inverter 12, will be:

I12=Pl/Ub=500/80=6,25 A

Then on the power transistor will dissipate power:

P12=0,5·I122·Rt=0,5·6,252·0,1=1,9 W

This small, compared with 500 watts of power will ensure high efficiency of the device.

Start-regulating device for gas discharge lamps high-pressure containing constant current source, the output of which is connected through serially connected inverter DC to AC pulse voltage (hereinafter in the text of the "Converter") and the rectifier to the inverter, the total input of which is connected to the common input of the inverter and rectifier, and the output is connected through two series-connected lamp with its inverted output, characterized in that the two sensor voltages, a current sensor, a second inverter, the voltage multiplier, key, condenser, two delay circuit scheme "or" scheme "and-not", the total output of the constant current source is connected to the common inputs of two voltage sensors, multiplier and through the current sensor to the common inputs of the Converter and the key output of the constant current source is connected to the input of the first voltage detector and with the input of the second inverter, the output of which through a multiplier connected to the input of the second voltage detector to the middle connection point of the two lamps and the electrode of the capacitor, the other electrode of which is connected to the input of the inverter, the output of the first voltage detector connected to the input schema "and not" and to the input of the first delay circuit, the inverted output of which is connected to the input circuit or, the other input of which is connected to the output of the second sensor voltage, and the output connected to the reset inputs in the "zero" of the Converter and the inverter control input key and input of the second delay circuit, the output of which is connected to another input circuit "and-not", the output of which is connected to the reset input in the "zero" of the second inverter, the input of the key is connected to the output of the rectifier, and the output of the current sensor is connected to the control input of the Converter.



 

Same patents:

The invention relates to electrical engineering and can be used when designing a power supply with high power factor for gas discharge lamps, for maximum match the shape of the consumed current and the shape of the mains voltage and eliminate failures output voltage

The invention relates to electrical engineering and can be used to power gas discharge lamps, such as fluorescent lighting lamps

The invention relates to lighting and can be used to eliminate false positives protect the ballast against harmful interference in a network, simplify the configuration of the ballast in the manufacturing process to compensate for process variation in load

Svitanak // 2173288
The invention relates to a means of visual identification of ground objects

The invention relates to electrical engineering and can be used to power a gas-discharge devices and, in particular, gas-discharge lamps

The invention relates to electrical engineering and can be used to power gas discharge lamps, e.g. fluorescent lighting lamps

FIELD: municipal equipment of residential houses and industrial buildings, namely automatic systems for controlling electric parameters, namely apparatuses for automatic control of different-designation illuminating devices.

SUBSTANCE: apparatus includes primary pulse-type photo-converter with built-in photo detector forming output pulse-width modulated information signal; secondary converter including micro-controller, shaping amplifier, switch, display module, power unit, inductor, unit for controlling illumination, switching controller of power supply of mains. Secondary converter includes in addition real-time clock and standby power source. Primary pulse-type photo-converter is connected with secondary converter by means of two-wire line that is connected with inlet of shaping amplifier and first terminal of inductor at one side and outlet of primary pulse type converter at other side. Outlet of shaping amplifier is connected with first inlet of micro-controller whose second inlet is connected with switch. Third inlet of micro-controller is connected with outlet of real-time clock. First outlet of micro-controller is connected with first inlet of power unit. Second outlet of micro-controller is connected with inlet of display module. Inlet of illumination control module is connected with third outlet of micro-controller. AC supply mains is connected with second inlet of power unit whose first outlet is connected with second terminal of inductor. Second outlet of power unit is connected with inlet of standby power source whose outlet is connected with respective inlet of real time clock. Outlet of illumination control unit is connected with connected in parallel first inlets of N switching controllers of power of mains. AC mains is connected with second (connected in parallel) inlets of N switching controllers of power of mains. Connected in parallel outlets of said switching controllers through load (illuminating lamps) are connected with zero wire of AC mains.

EFFECT: enhanced operational reliability and safety of apparatus.

7 cl, 1 dwg

FIELD: transport engineering; railway traffic control light signals.

SUBSTANCE: proposed controlled light-emitting diode light signal contains N transformers whose primary windings are connected in series aiding and connected to supply source through contact of signal relay and power electrodes of transistor, and each of N secondary windings of transformers is connected through protective diodes with corresponding group of light-emitting diodes consisting of K light-emitting diodes connected in series aiding. Each of K x N light-emitting diodes of groups is optically coupled with each of parallel connected K x N photoresistors. Light signal contains resistor and comparator circuit where first point of connection of parallel-connected photoresistors is connected to point of connection of contact of signal relay and transformer, and second point of connection of parallel-connected photoresistor is connected to first output of resistor and input of comparator circuit. Comparator circuit consists of differential amplifier whose first input is connected with common contact of voltage drop relay, its front and resting contacts are connected to first and second sources of reference voltage, respectively, second input of differential amplifier being input of comparator circuit whose output connected to control input of pulse generator being output of differential amplifier. Second output of resistor is connected with point of connection of one of power electrodes of transistor and supply source. Invention makes it possible to control brightness of light-emitting diodes and stabilize radiation, and it provides possibility of double reduction of voltage and blackout.

EFFECT: provision of reliable control of light signal.

1 dwg

Light diode lamp // 2248107

FIELD: engineering.

SUBSTANCE: device has block for connection to AC current source, converter for forming a DC current source and light diode group, consisting of multiple light diodes. Light diode group is provided with block for prior telling of service duration, including counter for measuring power-on period on basis of frequency of AC current source, integration device for power feeding, which is measured by counter, and for recording integrated value in energy-independent memory device and device for controlling power feeding mode for controlling light level of diodes in different modes, including normal lighting modes. Prior messaging block is meant for integration of power-on period for output of forwarding message, indicating approach of service duration end.

EFFECT: broader functional capabilities.

10 cl, 2 dwg

The invention relates to electrical engineering and can be used in the development of power devices light sources

The invention relates to electrical engineering and can be used to control lighting of staircases of residential and public buildings

The invention relates to electrical engineering and can be used to power a gas-discharge devices and, in particular, gas-discharge lamps

The invention relates to circuits regulating electrical power to loads such as, for example, fluorescent lighting system

Light diode lamp // 2248107

FIELD: engineering.

SUBSTANCE: device has block for connection to AC current source, converter for forming a DC current source and light diode group, consisting of multiple light diodes. Light diode group is provided with block for prior telling of service duration, including counter for measuring power-on period on basis of frequency of AC current source, integration device for power feeding, which is measured by counter, and for recording integrated value in energy-independent memory device and device for controlling power feeding mode for controlling light level of diodes in different modes, including normal lighting modes. Prior messaging block is meant for integration of power-on period for output of forwarding message, indicating approach of service duration end.

EFFECT: broader functional capabilities.

10 cl, 2 dwg

FIELD: transport engineering; railway traffic control light signals.

SUBSTANCE: proposed controlled light-emitting diode light signal contains N transformers whose primary windings are connected in series aiding and connected to supply source through contact of signal relay and power electrodes of transistor, and each of N secondary windings of transformers is connected through protective diodes with corresponding group of light-emitting diodes consisting of K light-emitting diodes connected in series aiding. Each of K x N light-emitting diodes of groups is optically coupled with each of parallel connected K x N photoresistors. Light signal contains resistor and comparator circuit where first point of connection of parallel-connected photoresistors is connected to point of connection of contact of signal relay and transformer, and second point of connection of parallel-connected photoresistor is connected to first output of resistor and input of comparator circuit. Comparator circuit consists of differential amplifier whose first input is connected with common contact of voltage drop relay, its front and resting contacts are connected to first and second sources of reference voltage, respectively, second input of differential amplifier being input of comparator circuit whose output connected to control input of pulse generator being output of differential amplifier. Second output of resistor is connected with point of connection of one of power electrodes of transistor and supply source. Invention makes it possible to control brightness of light-emitting diodes and stabilize radiation, and it provides possibility of double reduction of voltage and blackout.

EFFECT: provision of reliable control of light signal.

1 dwg

FIELD: municipal equipment of residential houses and industrial buildings, namely automatic systems for controlling electric parameters, namely apparatuses for automatic control of different-designation illuminating devices.

SUBSTANCE: apparatus includes primary pulse-type photo-converter with built-in photo detector forming output pulse-width modulated information signal; secondary converter including micro-controller, shaping amplifier, switch, display module, power unit, inductor, unit for controlling illumination, switching controller of power supply of mains. Secondary converter includes in addition real-time clock and standby power source. Primary pulse-type photo-converter is connected with secondary converter by means of two-wire line that is connected with inlet of shaping amplifier and first terminal of inductor at one side and outlet of primary pulse type converter at other side. Outlet of shaping amplifier is connected with first inlet of micro-controller whose second inlet is connected with switch. Third inlet of micro-controller is connected with outlet of real-time clock. First outlet of micro-controller is connected with first inlet of power unit. Second outlet of micro-controller is connected with inlet of display module. Inlet of illumination control module is connected with third outlet of micro-controller. AC supply mains is connected with second inlet of power unit whose first outlet is connected with second terminal of inductor. Second outlet of power unit is connected with inlet of standby power source whose outlet is connected with respective inlet of real time clock. Outlet of illumination control unit is connected with connected in parallel first inlets of N switching controllers of power of mains. AC mains is connected with second (connected in parallel) inlets of N switching controllers of power of mains. Connected in parallel outlets of said switching controllers through load (illuminating lamps) are connected with zero wire of AC mains.

EFFECT: enhanced operational reliability and safety of apparatus.

7 cl, 1 dwg

FIELD: electrical engineering; starting and operating circuits for gas-discharge lamps.

SUBSTANCE: proposed device designed for use in gas-discharge lamps of high starting voltage amounting to about 4 kV, such as high-pressure sodium vapor lamps, xenon and metal halide lamps that enables starting two lamps at a time from ac 220 V supply mains has dc current supply whose output is connected through series-interconnected converter and rectifier to input of inverter whose common input is connected to common inputs of inverter and rectifier and output, to its inverting output through two series-connected lamps; novelty is introduction of two voltage sensors, current sensor, second inverter, voltage multiplier, switch, capacitor, two delay circuits, OR circuit and NAND circuit; common output of dc current supply is connected to common inputs of two voltage sensors, multiplier, and through current sensor, to common inputs of converter and switch; output of dc current supply is connected to input of second inverter whose output is connected through multiplier to midpoint of two lamps and to capacitor electrode, other electrode of capacitor being connected to input of inverter; output of first voltage sensor is connected to input of NAND circuit and to input of first delay circuit whose inverting output is connected to input of OR circuit whose other input is connected to output of second voltage sensor and output, to clear inputs of converter and inverter, to control input of switch, and to input of second delay circuit whose output is connected to other input of NAND circuit; output of the latter is connected to clear input of second inverter; switch input is connected to rectifier output and current sensor output is connected to control input of converter.

EFFECT: enhanced efficiency, service life, power factor, and light stability; reduced power requirement.

1 cl, 2 dwg

FIELD: lighting equipment.

SUBSTANCE: device with control device has emission source, diffuser, electric outputs. Emission source has at least two light diodes of different colors with given space distributions of emission and localized in space as at least one group, board and control device, containing programmed channels for separate control over emission of light diodes of each color by feeding periodically repeating power pulses, lengths of which for light diodes of different color are independent from each other, while relations of lengths of period of power pulse, its increase front, decrease and pause are determined for light diodes of each color. Diffuser, inside which board with light diodes is positioned, is made at least partially enveloping the area of effect of emission of light diodes of emission source.

EFFECT: better aesthetic and emotional effect, close to optimal psycho-physiological effect of decorative multicolor lamp with vastly improved gamma of color effects, resulting in hypnotizing effect, increase of its attractiveness, efficiency, and broadening of its functional capabilities and addition of new consumer functions, lower costs and simplified usage.

20 cl, 15 dwg, 1 tbl

Up!