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What does a choke do in a power supply?
In electronics, a choke is an inductor used to block higher-frequency alternating currents while passing direct current (DC) and lower-frequencies alternating current (AC) in an electrical circuit.
What is filter choke used for?
Choke filters help reduce AC voltages to very small values, so that a load component such as a resistor will basically receive DC voltages. These unwanted AC signal fluctuations are called ripples. Chokes are very often used to filter out radio frequencies.
What is a power line choke?
A choke, also known as an inductor, is used to block higher-frequency while passing direct current (DC) and lower-frequencies of alternating current (AC) in an electrical circuit. The name comes from blocking, or “choking”, high frequencies while passing low frequencies.
Why is a choke filter used in AC?
The reason behind this is that capacitor allow AC and block DC. Choke filter came into existence due to shortcomings of the series inductor and shunt capacitor filter. A series inductor filter filters the output current but reduces the output current (RMS value and Peak value) up to a large extent.
How did the choke filter come into existence?
Choke filter came into existence due to shortcomings of the series inductor and shunt capacitor filter. A series inductor filter filters the output current but reduces the output current (RMS value and Peak value) up to a large extent. And the shunt capacitor filter performs filtering efficiently but increases the diode current.
How are chokes used in a power supply?
Chokes: A Choke is an Inductor type with or without a ferromagnetic core, used to block, hence “choke”, alternating current (AC) in a circuit by limiting the rate of change over a specified frequency range, while allowing passage of lower frequency AC or direct current (DC). This effect is often used in power supply
Why is a choke coil called an L section filter?
It is also called L-section filter because the inductor and capacitor are connected in the shape of inverted L. The output pulsating DC voltage from a rectifier circuit passes through the inductor or choke coil. The inductor has low DC resistance and extremely high AC reactance. Thus, ripples get filtered through choke coil.