“Q factor(symbol: Q)”的概念、定义、翻译、参考文献-科学参考

Q factor(symbol: Q)

Electronics and Electrical Engineering

A factor that is associated with a resonant circuit and describes both the ability of the circuit to produce a large output at the resonant frequency and the selectivity of the circuit. The Q factor is defined as
$\frac{2 π \times energy stored}{energy dissipated per cycle}$
or alternatively as
$\frac{energy stored}{energy dissipated per radian}$
In the case of a simple series resonant circuit at the resonant frequency,
$ω_{0} L = \frac{1}{ω_{0} C}$
and the Q factor is given by
$Q = \frac{ω_{0} L}{R} or Q = \frac{1}{ω_{0} C R}$
where ω₀ is 2π times the resonant frequency f₀ and L, C, and R are respectively the inductance, capacitance, and resistance of the circuit.
The selectivity of a resonant circuit can be written as
$Q = \frac{f_{0}}{BW}$
where BW is the difference in frequency between the two 3 dB points.
A single reactive component may be capable of resonance without any other components, i.e. if the self-capacitance of an inductance coil or the self-inductance of a capacitor is sufficiently large. The Q factor of a single component is defined as the ratio of the reactance to the effective series resistance of the component, hence for an inductance
$Q = \frac{ω_{0} L}{R}$
and for a capacitor
$Q = \frac{1}{ω_{0} C R}$

单词	Q factor(symbol: Q)
释义	Q factor(symbol: Q) Electronics and Electrical Engineering A factor that is associated with a resonant circuit and describes both the ability of the circuit to produce a large output at the resonant frequency and the selectivity of the circuit. The Q factor is defined as $\frac{2 π \times energy stored}{energy dissipated per cycle}$ or alternatively as $\frac{energy stored}{energy dissipated per radian}$ In the case of a simple series resonant circuit at the resonant frequency, $ω_{0} L = \frac{1}{ω_{0} C}$ and the Q factor is given by $Q = \frac{ω_{0} L}{R} or Q = \frac{1}{ω_{0} C R}$ where ω₀ is 2π times the resonant frequency f₀ and L, C, and R are respectively the inductance, capacitance, and resistance of the circuit. The selectivity of a resonant circuit can be written as $Q = \frac{f_{0}}{BW}$ where BW is the difference in frequency between the two 3 dB points. A single reactive component may be capable of resonance without any other components, i.e. if the self-capacitance of an inductance coil or the self-inductance of a capacitor is sufficiently large. The Q factor of a single component is defined as the ratio of the reactance to the effective series resistance of the component, hence for an inductance $Q = \frac{ω_{0} L}{R}$ and for a capacitor $Q = \frac{1}{ω_{0} C R}$
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