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Mencarelli Simone
V B Elettronica e telecomunicazioni
Esame di stato 2014
PRESENTAZINE !E" PR#ETT
DRIVER DI POTENZA PER LA REGOLAZIONE DELLE LU
IN UN IMPIANTO DI DOMOTICA
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INTRODUZIONE
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Robert
The men who changed history:
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Bosch cproduceinnovatcars. 3n
biggestinnovatcontrol electronsystems
car is th
An Invention of Robert Bosch Gmb
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All
!uring this year we haveproduced a 4A6 bus domotic $93e/pander. 5he circuit is made toac:uire and to distribute digitaland analog datas all along the
line from dierent pointsconnected to the 4A6 bus.
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The projectActive light controller
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5he aim of this pro;ect is to control houthe domotics 4an bus $93 e/pander.
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How it works
Analoginputx4
Line phasedsaw toothgenerator
Filteringandattenuation
,=> >3!
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The in!ut is com!osed of four voltage dividers #ith lo#$!ass filt
Analog input
The %a!lace trans
this circuit can e
R'(
)*s+ , $$$$$$$$$$$$ - $$$
R(.R'(
(
so& 0 (
)*s+ , $$$$ - $$$$$$$$$$
11 (.(235
(
6t , $$$$$$$$$$$$$$$$$$$$$
7-:-(235E*$1+
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;AIN AND UEN/? RE=
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4ircuit and waveforms oline phased generator
5he voltage of line signal is reducand transformed in a double halfbridge.=hen the obtained signal reachtransistor & passes to interdicticurrent to pass through the basthat discharges the capacitor 4&voltage of the double half-wave the transistor & is in saturatiointerdicted and the current comthe capacitor generating a small a
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4ircuit and waveforms oline phased generator
5he voltage of line signal is reducand transformed in a double halfbridge.=hen the obtained signal reachtransistor & passes to interdicticurrent to pass through the basthat discharges the capacitor 4&voltage of the double half-wave the transistor & is in saturatiointerdicted and the current comthe capacitor generating a small a
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-5he ,=> is a modulation techni:ue that the width )or duty cycle* of an impulsivewave signal.-5he width of the modulated signal is proto the voltage of the input signal.
-$t is often used in power controls )to cospeed of a motor*" in class ! ampliers )toutput of smartphones* and in switchinpacks.
-,=> is used because all transistors w
ulse !idth "odulation
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!" generator
5he ,=> generator is made using C operational am
comparators )integrated circuit 5?1'C*.5he sawtooth signal is compared with the signal incothe input circuit. 5he result of the comparison is the ,=
mathematical model reali9ed
using ;eogera
IN
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5he output circuit for lamp control is reali#optocouplers )to avoid the possibility of shwith 001v current* and C triacs.
#amp $ontrol
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5he 5%$A4 )5%$ode for Alternating 4electronic component used to control t$f a certain voltage is applied to his bais triggered and it starts conducbetween A& and A0. $t stops conduct
voltage applied to A& and A0 is e:ual t
5he circuit give a trigger signal on thon the negative half-wave of the line vspecic time that can be regulated duty cycle of the ,=> wave that de
amplitude of the input signal.
Triac
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5he %oot >ean D:voltage value that ppower dissipation on aload of the waveformcircuit it is directly p
intensity of the light.
5his model calculatedimmered sin wave.
5he slider +: relationship between
5%$A4 is +o and ththe sin wave )&9E1 s*
Toff 'i
C , $$$$$$ , $$$$$$$$
T 'imax
5he green curve relationship betwee
)@i9@ima/ * and the %
mathematical model reali9ed
using ;eogera
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Mencarelli Simone 5BE
not yet 5H6!