What Is Quality Factor Of Inductor?

What is meant by quality factor?

In physics and engineering the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is.

It is approximately defined as the ratio of the initial energy stored in the resonator to the energy lost in one radian of the cycle of oscillation..

What is the unit of Q factor?

Q-factor is a dimensionless quantity, and hence, will have no units.

How is Q of inductor measured?

The ratio between the resistance components and the frequency-dependent inductance (R/2πf L) is called the loss factor, and its inverse number is the Q value (Q=2πf L/R). Because f is the frequency of the current flowing through the coil, the Q value will differ according to the frequency.

What is quality factor of a filter?

The “Q” or Quality Factor In a Band Pass Filter circuit, the overall width of the actual pass band between the upper and lower -3dB corner points of the filter determines the Quality Factor or Q-point of the circuit.

What is quality factor in parallel RLC circuit?

The selectivity or Q-factor for a parallel resonance circuit is generally defined as the ratio of the circulating branch currents to the supply current and is given as: Note that the Q-factor of a parallel resonance circuit is the inverse of the expression for the Q-factor of the series circuit.

What is coil quality factor?

Quality factor (Q) or coil Q-factor is a dimensionless unit for the losses of a coil, quartz, or a resonator. For coils this refers to the ohmic losses of the coil-wire. They are inversely proportional for the coil quality and are calculated from the ratio of reactance to ohmic resistance.

How do I increase the quality factor of an inductor?

When current flows through an inductor, the inductor opposes the flow of current with some resistance. Lower the resistance, higher the quality or Q-factor of the inductor and the better its performance. One important point to note is that the higher the Q, the narrower the 3 dB bandwidth of the Inductor.

What is Q factor in resonance?

The Q, or quality, factor of a resonant circuit is a measure of the “goodness” or quality of a resonant circuit. … Q = Pstored/Pdissipated = I2X/I2R Q = X/R where: X = Capacitive or Inductive reactance at resonance R = Series resistance.

What is mechanical quality factor?

The mechanical quality factor is defined as(2) Q m = 2 π f U e P d where Ue is the stored mechanical energy of the system and Pd is the power dissipated, the unit of which is watts [9]. 2πf is the angular frequency.

How do I lower my Q factor?

The easiest way to reduce your Q factor is to install a shorter bottom bracket. There are many good, inexpensive square-taper BBs available in different lengths. You could pull the cranks off your present BB, measure them, and then order a shorter BB.

How is Q factor calculated?

Q factor is the overall width of an installed crankset, measured parallel to the bottom bracket shell from the outside of one pedal insertion point to the other. You can think of it like this: the larger the Q factor, the farther apart your feet will be.

How can you determine the coil quality?

Every inductor possesses a small resistance in addition to its inductance. The lower the value of this resistance R, the better the quality of the coil. The quality factor or the Q factor of an inductor at the operating frequency ω is defined as the ratio of reactance of the coil to its resistance.

What is the range of q?

0 to 5Q can be any positive or negative number. Q can be any positive number. Q ranges from 0 to 5.

Why is Q factor important?

When dealing with RF tuned circuits, there are many reasons why Q factor is important. … As losses decrease so the tuned circuit becomes sharper as energy is stored better in the circuit. It can be seen that as the Q increases, so the 3 dB bandwidth decreases and the overall response of the tuned circuit increases.

What is the relation between Q factor and voltage?

Explanation: We know that voltage across the capacitor in resonance condition is equal to Q times the source voltage. Hence as the Q factor increases, the voltage across the capacitor also increases.

What do you mean by dissipation factor?

Dissipation factor is defined as the reciprocal of the ratio between the insulating materials capacitive reactance to its resistance at a specified frequency.

What is a definition of a factor?

Factor, in mathematics, a number or algebraic expression that divides another number or expression evenly—i.e., with no remainder. For example, 3 and 6 are factors of 12 because 12 ÷ 3 = 4 exactly and 12 ÷ 6 = 2 exactly. … The prime factors of a number or an algebraic expression are those factors which are prime.

What is quality factor formula?

The quality factor relates the maximum or peak energy stored in the circuit (the reactance) to the energy dissipated (the resistance) during each cycle of oscillation meaning that it is a ratio of resonant frequency to bandwidth and the higher the circuit Q, the smaller the bandwidth, Q = ƒr /BW.

What is quality factor of capacitor?

Q Factor definition In an AC system, the Q factor represents the ratio of energy stored in the capacitor to the energy dissipated as thermal losses in the equivalent series resistance. For example, a capacitor that is capable of storing 2000 joules of energy while wasting only 1 joule has a Q factor of 2000.

What is quality factor investing?

The quality factor refers to the tendency of high-quality stocks with typically more stable earnings, stronger balance sheets and higher margins to outperform low-quality stocks, over a long time horizon.