Device for lighting control


H05B39/02 - Switching-on, e.g. with predetermined rate of increase of lighting current

 

The invention relates to electrical engineering and can be used to control lighting of staircases of residential and public buildings. The technical result is to increase the service life of incandescent lamps due to their inclusion in the time zero value of the mains voltage and most of the time they feed partial pressure. Device for lighting control contains connected with leads for connection to the mains AC input power semiconductor switch and power supply and pulse shaping. The first output of the power supply and pulse shaping is connected to the first input of the processing unit pauses, the output of which is connected through the power amplification control pulses with the control input of the power semiconductor key. Output power semiconductor key is connected to the lighting load, which consists of incandescent lamps. Storey button is connected to the second output of the power supply and pulse shaping and the input of the unit delay time, the output of which is connected to the second input of the processing unit pauses. 4 Il.

The invention relates to electrical engineering and can be used for UPRAVLENIE, containing two outputs for connection to a supply of alternating current connected to a programmed timer, power semiconductor key lighting load in the form of incandescent lamps.with. THE USSR 818038, H 05, 37/02, 1981).

A disadvantage of the known device is the ability of the supply voltage to the spiral bulbs at the moment of the peak value of the mains voltage. The cold resistance of the spiral is much less than hot, so there is inrush current exceeding the rated current of the incandescent lamp, which leads to the release of the lamps fail.

The closest in technical essence is a device for lighting control, containing leads for connection to the mains AC power semiconductor key, the unit time delay, floor buttons, incandescent (and.with. THE USSR 1427605, H 05, 37/02, 1986).

A disadvantage of the known device is powered emergency lighting half-wave rectified voltage that when the mass use of the device causes an unwanted DC component of the load current of the transformer supplying the transformer substation. Possible supply voltage spirolactone less than hot, so there is inrush current exceeding the rated current of the incandescent lamp, which leads to the release of the lamps fail. The device has a complex, adaptable lighting control system.

The technical result of the invention is to increase the service life of incandescent lamps.

The technical result is achieved in that the device for lighting control, containing leads for connection to the mains AC power semiconductor key, the unit time delay, floor buttons, incandescent lamp further comprises a power supply and pulse shaping, shaping unit breaks, the unit gain control pulses, and the first output of the power supply and pulse shaping is connected to the first input of the processing unit pauses, the output of which is connected through the power amplification control pulses with the control input of the power semiconductor key, the output of which is connected to the lighting load, and storey button is connected to the second output of the power supply and pulse shaping and the input of the unit delay time, the output of which is connected to the second input of the processing unit pauses.

In Fig.1 presents a block diagram of the device is the Loka formation pauses; in Fig.4 - diagram of the voltages in the nodes forming unit pauses.

Schematic and working principle of the zero-body known (Electrical engineering Handbook. /Under the General editorship Gerasimov Century, and others, so 3 kN. 2, page 65. - M.: Energoatomizdat, 1988). The use of counter-parallel connected thyristors as power semiconductor key is known (Electrical engineering Handbook, pp. 82-83). A device for receiving clock is known (Electrical engineering Handbook, page 65). The use of the capacitor as breathalyser element is known (Electrical engineering Handbook, page 525). The forming unit pauses made of standard logic elements.

The proposed technical solution, are new relationships between known elements.

Device for lighting control contains connected with leads for connection to the mains AC input power semiconductor key 1 and unit 2 power and pulse shaping. The first output unit 2 power and pulse shaping is associated with the first input unit 3 forming pauses, the output of which is connected through the block 4 gain control pulses with the control input of the power semiconductor CL is incandescent. Storey button 6 is connected to the second output of the unit 2 power and pulse shaping and the input unit 7 time delay, the output of which is connected to the second input unit 3 forming pauses. Unit 2 power and pulse shaping is intended to supply all of the elements of the device. Unit 3 forming pauses contains logic elements 8, 10, 11, 12 "2 - NO" and BCD four-digit counter 9. The output element 8 is connected to the input of the counter 9, the output of which is connected to the first input element 10. The second input element 10 connected to the first input element 12, the first and second inputs of the element 8. The output of the element 10 connected to the first input element 11, the second input is connected with the output element 12. The inputs of the element 8 is connected to the output of the unit 2 power and pulse shaping. The output element 11 is connected to the amplification unit 4 pulses, and the second input element 12 is connected with the block 7 time delay. Conclusions 2, 3, 11 logical element 9 (counter) are connected.

The device operates as follows.

When switching on the mains voltage (Fig.2A) is fed to the power semiconductor key 1 and unit 2, which generates the pulses "a" (Fig.2B), synchronize with each moment of transition napriagaius, which generates pulses "b" (Fig.2B) packages of two pulses at the moment of transition of the first period of the mains voltage through zero.

Pulses "and" (logical "1") (Fig. 2B; 4B) are fed to the first input unit 3 forming pauses: the inputs of the element 8, the second input element 10 and the first input element 12. With the output element 8 proinvestirovany a sequence of pulses (Fig.4B) is fed to the input of the counter 9 (findings 2, 3, 11 logical element 9 are connected), the output of the counter 9 signal changes the logical value "0" to logic "1" (Fig.4G) in the time of arrival of each odd pulse to the input of the counter 9. The duration of the signals of logical "1" or a logical "0" output of the counter 9 is equal to the duration of the period of the network. When the coincidence signal of logical "1" at the inputs of the element 10 at its output, a signal is generated logical "0" (Fig.4D), synchronized with the moment of transition of the first (odd) period of the mains voltage through zero. When receiving element 10 to the first input element 11 a logical signal "0" at the output of the element 11 a signal of logical "1" (Fig.2B; 4E).

When the mismatch of the signals at the inputs of the element 10 at its output, a signal is generated logical "1". When matching signpost signal is longer than the period of the mains voltage, eliminating the third and fourth pulses of logic "1" from a sequence of four pulses, i.e., formed a pause in the sequence of pulses.

Pulses "b" (Fig.2B), synchronized with the moment of transition of the voltage through zero, the stronger the block 4 and fed to the control input of the power semiconductor 1 key, opening it at the time, close to a zero value of the mains voltage.

Semiconductor power key 1 enables power to the incandescent lamp only in the transition zone of the mains voltage through zero, and generates the working and non-working periods of the lighting network (Fig.2G). Incandescent bulbs burn at half intensity.

To turn on the lighting load to full strength pressed any of the floor buttons 6. When snapping storey button 6 signal logical "1" from block 7 time delay is supplied to the second input unit 3 forming pauses. When signals at both inputs of unit 3 at its output pulses "b" and "C" (Fig.2D), synchronize with the time of the transition voltage through zero for the first and second (odd and even) periods of the mains, they are amplified and fed for managing Brusco 5 served the full supply voltage (Fig.2A). Incandescent lamps are lit to full strength.

The exposure time required for descent or ascent on the n-floor mounted unit 7 extracts the time. After the time delay to the second input unit 3 disappears, the logical signal "1" from the output unit 7. Device for lighting control is returned to the initial state: incandescent bulbs burn at half intensity.

The proposed solution allows to increase service life of incandescent lamps due to their inclusion in the time zero value of the mains voltage, and also due to the fact that most of the time they feed partial pressure. During operation of the device there is no constant component of the load current of the transformer mains. Simplified diagram of the lighting control, floor buttons are made low. Energy saving in time when the load is supplied incomplete voltage.

Claims

Device for lighting control, containing leads for connection to the mains AC power semiconductor key, the unit time delay, floor buttons, tungsten, characterized in that the device additionally the key and output for connection to a supply of alternating current, the shaping unit breaks, the unit gain control pulses, and the first output of the power supply and pulse shaping is connected to the first input of the processing unit pauses, the output of which is connected through the power amplification control pulses with the control input of the power semiconductor key, the output of which is connected with incandescent lamps, and floor buttons connected to the second output of the power supply and pulse shaping and the input of the unit delay time, the output of which is connected to the second input of the processing unit pauses.

 

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