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LCR 共振计算器 (串联与并联 RLC 回路)

本工具用于计算由电阻 (R)、电感 (L) 和电容 (C) 组成的 LCR 回路（即 RLC 回路）的谐振频率、谐振时的阻抗与容抗/感抗、品质因数 (Q值)、频带宽度 (BW) 以及截止频率，支持串联和并联两种连接形态。

计算公式

谐振频率 (f₀): f₀ = 1 2π √LC [Hz]

谐振感抗与容抗 (X₀): X_L = ω₀L, X_C = 1 ω₀C （谐振时 X_L = X_C = X₀）

串联谐振 Q值与带宽: Q_s = 1 R √ LC , BW_s = f₀ Q_s

并联谐振 Q值与带宽: Q_p = R √ CL , BW_p = f₀ Q_p

关于 LCR 谐振回路

LCR 电路的谐振发生在感抗 ($X_L$) 与容抗 ($X_C$) 大小相等、方向相反并相互抵消的频率点。
- **串联谐振回路**在谐振频率处回路的总阻抗降至最低（等于电阻 R），从而使得流经电路的电流达到最大值。
- **并联谐振回路**在谐振频率处回路的总阻抗升至最高，从而使外部输入回路的总电流降至最低。
品质因数 Q 值（即谐振锐度）越高，谐振曲线越尖锐，对应的通频带宽度 (BW) 就越窄。

输入参数

输出结果

输入参数并点击“计算”以显示结果。

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电阻 (R):
电感 (L):
电容 (C):