سلام دوستان. من هم بعد از یکی دو ماهی دوباره آپ کردم. این بار هم یه
مدار خیلی خوب و پرکاربرد واسه شما دارم. این مدار یکی از واجبات کار هر فرد تو
زمینه ی الکترونیک است. یعنی مدار منبع تغذیه ی متغییر صفر نا سی ولت و صفر تا دو
آمپر (Power
supply 0-30v/ 0-2A)هست.یه وقت نگید این همون مداری که تو اوون وبلاگ و اوون وب سایت
دیدیم. نه این اوون نیست. این مدار از اوون یکی خیلی بهتره. یعنی خروجی رو واسه
شما رگوله میکنه بیست بیست حرف نداره. من که نتونستم آی سی شو پیدا کنم اما هنوز
دنبالش هستم ببینیم یه بامرامی پیدا می شه واسمون گیر بیاره. اگه بسازیدش ضرر
نمیکنی هیچی، کلی هم نیازات برطرف می شه. میگی نه! خوب بساز!!(حالا یه بارم که شده
یه متن انگلیسی رو هم بخون، یه کمی که سر در میاری)
The basic requirements than one laboratorial power supply, it is
to provide voltages and currents of operation that need the usual units, to
have low output resistance, low noise, small ripple and good stabilisation. The
above requirements are covered, from the circuit. Many power supply allocate
electronic safety that him protects from destruction, when short their exit. In
the circuit it can be regulated the superior price of output current, in a any
price from 0 until 2A and him exceed, even if the load need has bigger
requirements. Thus not only auto protection, but simultaneously it can it
protects also the unit that it supplies, if the last one has the tendency to
pull current bigger than forecasted. The circuit, it can be used still for the
control of elements, the mapping out of characteristics of voltage /current and
be used as a ideal source of constant voltage - current, capable it gives 0-30V
dc and 0-2A, continuously regulated and no in steps. The transformer T1 has two
secondary coils. The A coil supplies the circuit of output with high current,
via the D1-4, C2 and the B coil, that it supplies the IC1, after is rectified
by the D1, C4 and is stabilised by the D7, C5. The current passes through LED
D6, who is also useful as clue of operation. The C7 makes compensation of
frequency in the internal circuit of IC1 and the R2/D8/D9, him protects from
the peaks voltage of network. With R3, we regulate the output voltage, in the
point that we want. With the R8, we regulate the limit of current, that we wish
in the exit. In the exit of power supply exists one multiple Darlington,
constituted from the Q1, Q2 and Q3, Q4 that is parallel.The Resistances R14,
R15 ensure the homology of currents of collector, the R10 until R12 improve the
DC stability of output circuit, that has basic importance in high temperature,
where the reverse currents begin to become considerable. The R9, c10, c11
achieves the compensation of frequency in the output amplifier of IC1 and the
D13, his protection. Through the R19 it passes the output current. The fall of
voltage that is presented in utmost his is degraded at a percentage and it is
applied in the entry of 11 IC1. In the second entry of 10 IC1 is applied a
constant voltage, the price of which is regulated by the R8, in the desirable
biggest price of output current. As soon as the output current exceed this price,
the fall of voltage in the R19, it is applied in the entry of 10 IC1, so that
is activated the differential amplifier in the IC1 and it prohibits the further
increase of output current. Capacitors C13, C14, C15 make unyoke of exit, while
the D15 him protects from the reverse voltage. With instrument VA1, we can
measure so much the output voltage, what the current, depending on the place
that is placed switch S2. In the place that is appears in the circuit, the
switch measure the current, taking sample from the fall of voltage, above in
the R19, via the R17, R18. To we measure the voltage it will be supposed we
move the switch in the other place, taking sample of output voltage. The
micrometer regulation becomes from the R21, R22. The Transistor Q2, should be
placed in a small heatsink, as well as the Q3, Q4, in heatsink with thermic
resistance 2.6° C/W. The regulation of power supply can become easily, with the
help of digital multimeter, which we will connect in the exit. Moving and
regulating him trimmer in combination with main pontesometer regulation of
voltage and current.
|
R1= 1.2Kohm 1W
|
R20= 3.9Kohm
|
D6= LED 5mm RED
|
|
R2-12= 100ohm
|
R22= 56Kohm
|
D7= 1N5252B
|
|
R3= 47Kohm Lin.
|
C1-3= 330nF 250V
|
D8= IN5236B
|
|
R4-7-21= 10Kohm trimmer
|
C2= 4700uF 63V
|
D9....14= 1N4002
|
|
R5= 8.2Kohm
|
C4= 68uF 63V
|
D15= MR501
|
|
R6-10= 12Kohm
|
C5= 47uF 40V
|
Q1= MPSL01
|
|
R8= 470ohm Lin.
|
C6-15= 10nF 100V
polyester
|
Q2= 2N4923
|
|
R9= 1.2Kohm
|
C7-12= 100nF 100V
polyester
|
Q3-4= 2N3055
|
|
R11= 820ohm
|
C8= 680nF 100V
polyester
|
IC1= MC1466L
Motorola
|
|
R13= 560ohm
|
C9-14= 1uF 40V
|
T1=220VAC/ A:34V/4A
B:36V/50mA
|
|
R14-15= 0.68ohm 2W
|
C10= 220pF
ceramic
|
F1= 1A/250V slow
Fuse
|
|
R16= 330ohm
|
C11=
10pF ceramic
|
F2= 2A slow Fuse
|
|
R17= 470ohm
|
C13= 220uF 40V
|
S1= 2XON/OFF
10A/250V switch
|
|
R18= 470ohm trimmer
|
D1-4= 15A Bridge
|
S2= 2X2 ON 1A
switch
|
|
R19= 0.22ohm 2W
|
D5= 1N4002
|
VA1= 500μA
|
|
ضمنا نظر
هم یادتون نره
سلام من كامران محمدي يكي از علاقه مندان به الكترونيك هستم و اين وبلاگ را نيز به همين دليل تاسيس كرده ام. من از شما دوستان ميخواهم كه مرا با نظراتتان و معرفي وب سايت ها و وبلاگ هاي الكترونيكي ياري دهيد.