Effect Of High Frequency On Inductor

Very simply if you drop the frequency the motor will slow down. Is called inductive reactance x l.

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The inductances are often in the 50 500 nh range.

Effect of high frequency on inductor. The opposition that an inductor presents to ac. Speaking very generally for a fixed inductance increasing the switching frequency will decrease the inductor ripple current and usually the output voltage ripple. 2 cooling is a direct function of rotational speed.

Because the inductor reacts to a changing current it is known as a reactive component. The speed change that results will be proportional to the frequency change. 1 rotational speed is a direct function of the power frequency.

However if the current flowing through an inductor changes very rapidly such as with the operation of a switch high voltages can be induced across the inductors coil. This is observed as high frequency inductive behavior. Because the effect is magnetic using shielded wires or coax does not eliminate the effect.

Consider the circuit of the inductor on the right. Circuit an inductor produces inductive reactance which causes the current to lag the voltage by 90 degrees. If the increase in high frequency output impedance shown in the previous slides is not a concern or only the inductor value is decreased the higher resonant frequency resulting from lower value output filter components does permit more of the error amplifier gain to be used to control output voltage at middle frequencies.

The inductor also has its own resonance frequency. Increases in inductance of up to 28 times corresponding to inductance densities of up to 13 mhmm2 were obtained significantly greater than prior values for on chip inductors. Effect of frequency on inductive reactance.

These effects can be minimized by twisting the wires and by their proper placement. Conversely if you raise the frequency the motor will speed up. As the frequency increases the impedance of the inductor increases while the impedance of the parasitic capacitor decreases so at some high frequency the impedance of the capacitor is much lower than the impedance of the inductor which means that your inductor behaves like a capacitor.

It will increase switching losses and decrease efficiency. This opposition is caused by the inductor reacting to the changing current of the ac. High frequency heating induction is type of a heating process that uses high frequency electricity to heat the substances that are conductive electrically in nature.

This article describes the basics of induction heating the frequency range used for rapid heating of small parts or the skin of larger parts mid frequency 500 hz to 10 khz and high range high frequency 100 khz to 2 mhz used for deep penetration.

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