what is Dc power supply ? types D.c power supply

1. DC Power Supply
Abdullahi Shire ALi
172-19-1998
DC power supplies are power supplies which
produce an output DC voltage. Power supplies are
devices that deliver electric power to one or several
loads. They generate the output power by converting
an input signal into an output signal (in this case, a
DC output). The main function of this device is to
change the electrical current from a source to the
accurate voltage, frequency and current to supply .
Dc power supply Operation
A basic DC power supply can be built with four
circuits (or sections), as shown in the following
diagram
Rectifier
Transforme
r
Filters Regulator
Transformer: The transformer's main function is to
step-down (lower the amplitude) or step-up
(increase the amplitude) the signal to produce the
desired DC level required at the output of the
power supply.
Rectifier : is an electrical device composed of one or
more diodes that converts alternating current (AC)
to direct current (DC), the rectifier can be a half-
wave or full-wave rectifier
Filters: is device which is remove the A.C current and
produce D.C current, also filter circuit is general a
combination of inductor (L) and Capacitors is called
filter .In the D.C power supply the output of bridge
rectifier is not pure D.C and need to be converted into
pure form.so that Capativice circuit is used as filter or
smooth
Input: 120 VAC
RMS,
60 Hz
Steps the input
voltage up and
down as needed
Convert the ac to
a pulsing dc
Low-pass type
for removing
voltage
variation
Keeps voltage
constant
regardless of
load change
Types of D.C Power supply
Regulator: is a circuit that is connected between
the power source and a load, that provides
a constant voltage
despite variations in input voltage or output load.
The regulator has two functions: (1) to smooth the
signal from the filter producing a DC signal with no
ripple, and (2) to produce a constant voltage at the
output
Conclusion
Reference
Syed Nazmus Sakib
Lecture
Eletronics and Telecommunication Engineering
Daffodil international University
Types of D.C
Power supply
The power supply is fundamental piece in
your lab testing and the others
equipment like using our Computer
1)Electronic Measurement and Instrumentation
Book by Klaas B. Klaassen
2)Electronic Measurement & Instrumentation
Book by R.K. Rajput
3)Power supply - Wikipedia
https://en.wikipedia.org/wiki/Power_supply
4)DC Power Supply | Keysight (formerly Agilent's Electronic Measurement)
https://www.keysight.com/en/pc.../dc-power-supplies?cc=US&lc=eng