Series Inductor Filter
The rectified output when passed through this filter, the inductor blocks the ac components that are present in the signal, in order to provide a pure dc. This is a simple primary filter.
Which of the following filter is gives comparatively pure DC output?
Series Inductor Filter
The rectified output when passed through this filter, the inductor blocks the ac components that are present in the signal, in order to provide a pure dc. This is a simple primary filter.
How do you get pure DC voltage?
In the circuit, capacitor stores energy while the input increases from zero to a peak value and, while the supply voltage decreases from peak value to zero,
capacitor starts discharging
. This charging and discharging of the capacitor will make the pulsating DC into pure DC, as shown in figure.
What is the source to get pure DC?
Direct Current (DC) Power refers to the unidirectional flow of electrons and is the form of power that is most commonly produced by sources such as
solar cells and batteries
.
Which circuit smoothes the rectified output into a pure DC signal?
15 The function of the smoothing section of a power supply circuit is to take the
pulsating DC (PDC)
and convert it to a “pure” DC with as little AC “ripple” as possible. The smoothed DC voltage, shown in the illustration on the right in Figure 11.32, is then applied to the load.
Is zener a diode?
A Zener diode is
a silicon semiconductor device that permits current to flow in
either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.
How do you remove ripples from DC?
The ripple can be reduced by
smoothing capacitors
which converts the ripple voltage into a smoother dc voltage. Aluminum electrolytic capacitors are widely used for this and have capacitances of 100uF or more. The repeated dc pulses charges the capacitor to the peak voltage.
How do you convert 220V to 5V DC?
In order to use the 220V AC supply as 5V DC supply,
voltage step down transformer and a rectifier circuit
are used, which is shown in Fig. 3. In this circuitry, a step-down transformer is used to convert 220V AC to 9V AC. This 9V AC is then transformed into 9V DC by a full bridge rectifier circuit.
What is ripple factor?
Ripple factor: Ripple factor is
a measure of effectiveness of a rectifier circuit
. It is defined as the ratio of RMS value of the AC component (ripple component) Irrms in the output waveform to the DC component VDC in the output waveform.
Why DC is not used in homes?
Direct current is not used at home
because for the same value of the voltage, DC is more lethal than AC since direct current does not go through zero
. Electrolytic corrosion is more an issue with direct current. DC inductors are more complicated. It requires commutators, electronic switches and brushes.
Which is better AC or DC?
Alternating current
is cheaper to generate and has fewer energy losses than direct current when transmitting electricity over long distances. Although for very long distances (more than 1000 km), direct current can often be better.
Are batteries AC or DC?
Batteries and electronic devices like TVs, computers and DVD players use
DC electricity
– once an AC current enters a device, it’s converted to DC. A typical battery supplies around 1.5 volts of DC.
What is the role of filter in DC power supply?
The filtering stage of a power supply circuit
smoothes out the ripples in the rectified DC to produce a smooth direct current that’s suitable for even the most sensitive of circuits
. Filtering is usually accomplished by introducing a capacitor into the power supply circuit.
How can ripple current be reduced?
A
capacitor input filter
(in which the first component is a shunt capacitor) and choke input filter (which has a series choke as the first component) can both reduce ripple, but have opposing effects on voltage and current, and the choice between them depends on the characteristics of the load.
