驻做射此时改称,选举择电触电容时特别关注其他们的q,等于那什麽是q值呢?
Q what is the meaning, why is it important?
Quality factor Q: characterization of an energy storage device (
如电感线圈、电容等)
,谐振电路所储能量该每周损耗功能量之比的一种质量指标。
前件的q值愈大,用该元件组成的电路或网路选举择性愈佳。
Or Q = / active power reactive power, or the ratio of the characteristic impedance and the loop resistance.
The higher the Q value, the smaller the loss, the higher the efficiency;
Q value is higher, the higher the frequency stability of resonator, therefore, can be more accurate.
Defines the quality factor of capacitance, Q value, also is the capacitance of the storage power loss and power than: Qc = (
1/ωC)
/ esrq值对高宽带电容是比较重要的参数。
The reciprocal of Q value is equal to the D value.
损失角即d等于:一般电解电容器因为内阻较大故d值较高,其规格视电容等于高低决定,造作。
1 -
0.
24 the following.
塑胶薄膜电容器则d值较低,视其材质决定为。
001 -
0.
The following 01.
陶瓷电容器视其材质决定,hi-
k type及s / c type为。
025 the following.
T/C type, its specification to Q value is said to be higher than 400 -
1000.
Note: XC = -
j/(
2πfC)
;
XL=j(
2πfL)
根据损耗因可数d的定义:d = 1 / q = r / | x | & gt;
0 to plug in the previous formula, get: if leakage between electrodes can be ignored, that is, the impedance of the Rp infinity (
Or is far greater than the impedance of the relative to the capacitance value of C)
计算公式,损耗因可数d大大简化为:我们信号频率远远小归于srf谐振此时率,则x c & gt;>
X L, namely X L can be ignored, it further simplify the formula mentioned above: the figure shown, the
capacitor lead inductance would reduce with the increase of frequency and the characteristics of the capacitor.
我们引线电感与实时,电容器的电容谐振这将会产串联谐振生一个,使日本内阁总理电抗趋向为w。
As a result of this series resonance to create a very small series impedance, so it is suitable for applications in the radio frequency circuit of coupling and decoupling circuit.
然而,当电路工作此时率高于串友联谐振此时率时,该电容器将表现为电感性文字是电容性。
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